US20130231022A1 - Prepregs based on a storage-stable reactive or highly reactive polyurethane composition - Google Patents
Prepregs based on a storage-stable reactive or highly reactive polyurethane composition Download PDFInfo
- Publication number
- US20130231022A1 US20130231022A1 US13/824,084 US201113824084A US2013231022A1 US 20130231022 A1 US20130231022 A1 US 20130231022A1 US 201113824084 A US201113824084 A US 201113824084A US 2013231022 A1 US2013231022 A1 US 2013231022A1
- Authority
- US
- United States
- Prior art keywords
- group
- dye
- prepreg according
- uretdione
- reactive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 92
- 239000004814 polyurethane Substances 0.000 title claims abstract description 79
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 78
- 239000000049 pigment Substances 0.000 claims abstract description 44
- PCHXZXKMYCGVFA-UHFFFAOYSA-N 1,3-diazetidine-2,4-dione Chemical group O=C1NC(=O)N1 PCHXZXKMYCGVFA-UHFFFAOYSA-N 0.000 claims description 44
- 239000011159 matrix material Substances 0.000 claims description 36
- 239000002131 composite material Substances 0.000 claims description 30
- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 claims description 28
- 239000003054 catalyst Substances 0.000 claims description 27
- 238000004519 manufacturing process Methods 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 239000000975 dye Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 239000005056 polyisocyanate Substances 0.000 claims description 24
- 229920001228 polyisocyanate Polymers 0.000 claims description 24
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 21
- 229920000642 polymer Polymers 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 125000001931 aliphatic group Chemical group 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 11
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 229920003235 aromatic polyamide Polymers 0.000 claims description 9
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 8
- 125000000524 functional group Chemical group 0.000 claims description 8
- -1 inorganic acid anion Chemical class 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 7
- 150000002513 isocyanates Chemical class 0.000 claims description 7
- 150000004714 phosphonium salts Chemical group 0.000 claims description 7
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 7
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- 239000002981 blocking agent Substances 0.000 claims description 6
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 claims description 6
- 150000002118 epoxides Chemical class 0.000 claims description 6
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- WJIOHMVWGVGWJW-UHFFFAOYSA-N 3-methyl-n-[4-[(3-methylpyrazole-1-carbonyl)amino]butyl]pyrazole-1-carboxamide Chemical compound N1=C(C)C=CN1C(=O)NCCCCNC(=O)N1N=C(C)C=C1 WJIOHMVWGVGWJW-UHFFFAOYSA-N 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 239000001023 inorganic pigment Substances 0.000 claims description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 4
- 125000005496 phosphonium group Chemical group 0.000 claims description 4
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 4
- ATOUXIOKEJWULN-UHFFFAOYSA-N 1,6-diisocyanato-2,2,4-trimethylhexane Chemical compound O=C=NCCC(C)CC(C)(C)CN=C=O ATOUXIOKEJWULN-UHFFFAOYSA-N 0.000 claims description 3
- QGLRLXLDMZCFBP-UHFFFAOYSA-N 1,6-diisocyanato-2,4,4-trimethylhexane Chemical compound O=C=NCC(C)CC(C)(C)CCN=C=O QGLRLXLDMZCFBP-UHFFFAOYSA-N 0.000 claims description 3
- NAUBYZNGDGDCHH-UHFFFAOYSA-N N=C=O.N=C=O.CCCC(C)C Chemical compound N=C=O.N=C=O.CCCC(C)C NAUBYZNGDGDCHH-UHFFFAOYSA-N 0.000 claims description 3
- JGCWKVKYRNXTMD-UHFFFAOYSA-N bicyclo[2.2.1]heptane;isocyanic acid Chemical compound N=C=O.N=C=O.C1CC2CCC1C2 JGCWKVKYRNXTMD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 claims description 2
- SDXAWLJRERMRKF-UHFFFAOYSA-N 3,5-dimethyl-1h-pyrazole Chemical class CC=1C=C(C)NN=1 SDXAWLJRERMRKF-UHFFFAOYSA-N 0.000 claims description 2
- NSPMIYGKQJPBQR-UHFFFAOYSA-N 4H-1,2,4-triazole Chemical compound C=1N=CNN=1 NSPMIYGKQJPBQR-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000980 acid dye Substances 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims description 2
- 239000000981 basic dye Substances 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 229940043279 diisopropylamine Drugs 0.000 claims description 2
- 239000000982 direct dye Substances 0.000 claims description 2
- 239000000986 disperse dye Substances 0.000 claims description 2
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000434 metal complex dye Substances 0.000 claims description 2
- 239000000983 mordant dye Substances 0.000 claims description 2
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 claims description 2
- 150000002989 phenols Chemical class 0.000 claims description 2
- 239000000985 reactive dye Substances 0.000 claims description 2
- 125000003396 thiol group Chemical group [H]S* 0.000 claims description 2
- 239000000984 vat dye Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims 1
- 229920001692 polycarbonate urethane Polymers 0.000 claims 1
- 238000010248 power generation Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000001723 curing Methods 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 16
- 238000004132 cross linking Methods 0.000 description 15
- 238000005470 impregnation Methods 0.000 description 14
- 239000000843 powder Substances 0.000 description 12
- 239000002904 solvent Substances 0.000 description 12
- 239000003365 glass fiber Substances 0.000 description 11
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 239000004744 fabric Substances 0.000 description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 6
- 230000009477 glass transition Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical compound [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- NHGXDBSUJJNIRV-UHFFFAOYSA-M tetrabutylammonium chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CCCC NHGXDBSUJJNIRV-UHFFFAOYSA-M 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000004760 aramid Substances 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 4
- 125000005442 diisocyanate group Chemical group 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- FPGGTKZVZWFYPV-UHFFFAOYSA-M tetrabutylammonium fluoride Chemical compound [F-].CCCC[N+](CCCC)(CCCC)CCCC FPGGTKZVZWFYPV-UHFFFAOYSA-M 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- OKIZCWYLBDKLSU-UHFFFAOYSA-M N,N,N-Trimethylmethanaminium chloride Chemical compound [Cl-].C[N+](C)(C)C OKIZCWYLBDKLSU-UHFFFAOYSA-M 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical class C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 3
- 238000010410 dusting Methods 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 150000004679 hydroxides Chemical class 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 description 2
- OQZAQBGJENJMHT-UHFFFAOYSA-N 1,3-dibromo-5-methoxybenzene Chemical compound COC1=CC(Br)=CC(Br)=C1 OQZAQBGJENJMHT-UHFFFAOYSA-N 0.000 description 2
- HSNJERRVXUNQLS-UHFFFAOYSA-N 1-(4-tert-butylphenyl)propan-2-one Chemical compound CC(=O)CC1=CC=C(C(C)(C)C)C=C1 HSNJERRVXUNQLS-UHFFFAOYSA-N 0.000 description 2
- APVHHYZQHRNDOY-UHFFFAOYSA-N C[O-].CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC Chemical compound C[O-].CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC APVHHYZQHRNDOY-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NIPLIJLVGZCKMP-UHFFFAOYSA-M Neurine Chemical compound [OH-].C[N+](C)(C)C=C NIPLIJLVGZCKMP-UHFFFAOYSA-M 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- UHHXUPJJDHEMGX-UHFFFAOYSA-K azanium;manganese(3+);phosphonato phosphate Chemical compound [NH4+].[Mn+3].[O-]P([O-])(=O)OP([O-])([O-])=O UHHXUPJJDHEMGX-UHFFFAOYSA-K 0.000 description 2
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- VBQDSLGFSUGBBE-UHFFFAOYSA-N benzyl(triethyl)azanium Chemical compound CC[N+](CC)(CC)CC1=CC=CC=C1 VBQDSLGFSUGBBE-UHFFFAOYSA-N 0.000 description 2
- HTZCNXWZYVXIMZ-UHFFFAOYSA-M benzyl(triethyl)azanium;chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC1=CC=CC=C1 HTZCNXWZYVXIMZ-UHFFFAOYSA-M 0.000 description 2
- FKPSBYZGRQJIMO-UHFFFAOYSA-M benzyl(triethyl)azanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC1=CC=CC=C1 FKPSBYZGRQJIMO-UHFFFAOYSA-M 0.000 description 2
- YOUGRGFIHBUKRS-UHFFFAOYSA-N benzyl(trimethyl)azanium Chemical compound C[N+](C)(C)CC1=CC=CC=C1 YOUGRGFIHBUKRS-UHFFFAOYSA-N 0.000 description 2
- KFSZGBHNIHLIAA-UHFFFAOYSA-M benzyl(trimethyl)azanium;fluoride Chemical compound [F-].C[N+](C)(C)CC1=CC=CC=C1 KFSZGBHNIHLIAA-UHFFFAOYSA-M 0.000 description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 description 2
- NDKBVBUGCNGSJJ-UHFFFAOYSA-M benzyltrimethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)CC1=CC=CC=C1 NDKBVBUGCNGSJJ-UHFFFAOYSA-M 0.000 description 2
- NSPSPMKCKIPQBH-UHFFFAOYSA-K bismuth;7,7-dimethyloctanoate Chemical compound [Bi+3].CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O NSPSPMKCKIPQBH-UHFFFAOYSA-K 0.000 description 2
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- 238000006471 dimerization reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- WNEGXOWUERJNTB-UHFFFAOYSA-N ethanolate;triethyl(methyl)azanium Chemical compound CC[O-].CC[N+](C)(CC)CC WNEGXOWUERJNTB-UHFFFAOYSA-N 0.000 description 2
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- FUCULZLKZDDJCS-UHFFFAOYSA-N methanolate;triethyl(methyl)azanium Chemical compound [O-]C.CC[N+](C)(CC)CC FUCULZLKZDDJCS-UHFFFAOYSA-N 0.000 description 2
- MOVBJUGHBJJKOW-UHFFFAOYSA-N methyl 2-amino-5-methoxybenzoate Chemical compound COC(=O)C1=CC(OC)=CC=C1N MOVBJUGHBJJKOW-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 125000002524 organometallic group Chemical group 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- YKYONYBAUNKHLG-UHFFFAOYSA-N propyl acetate Chemical compound CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 2
- 150000003512 tertiary amines Chemical class 0.000 description 2
- 229940073455 tetraethylammonium hydroxide Drugs 0.000 description 2
- CIFIGXMZHITUAZ-UHFFFAOYSA-M tetraethylazanium;benzoate Chemical compound CC[N+](CC)(CC)CC.[O-]C(=O)C1=CC=CC=C1 CIFIGXMZHITUAZ-UHFFFAOYSA-M 0.000 description 2
- QSUJAUYJBJRLKV-UHFFFAOYSA-M tetraethylazanium;fluoride Chemical compound [F-].CC[N+](CC)(CC)CC QSUJAUYJBJRLKV-UHFFFAOYSA-M 0.000 description 2
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 description 2
- ZYSDERHSJJEJDS-UHFFFAOYSA-M tetrakis-decylazanium;hydroxide Chemical compound [OH-].CCCCCCCCCC[N+](CCCCCCCCCC)(CCCCCCCCCC)CCCCCCCCCC ZYSDERHSJJEJDS-UHFFFAOYSA-M 0.000 description 2
- HNRXDBMBQAOWFV-UHFFFAOYSA-M tetraoctadecylazanium;hydroxide Chemical compound [OH-].CCCCCCCCCCCCCCCCCC[N+](CCCCCCCCCCCCCCCCCC)(CCCCCCCCCCCCCCCCCC)CCCCCCCCCCCCCCCCCC HNRXDBMBQAOWFV-UHFFFAOYSA-M 0.000 description 2
- QGAKFUJUPKPDCN-UHFFFAOYSA-M tetraoctylazanium;fluoride Chemical compound [F-].CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC QGAKFUJUPKPDCN-UHFFFAOYSA-M 0.000 description 2
- DCFYRBLFVWYBIJ-UHFFFAOYSA-M tetraoctylazanium;hydroxide Chemical compound [OH-].CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC DCFYRBLFVWYBIJ-UHFFFAOYSA-M 0.000 description 2
- JVOPCCBEQRRLOJ-UHFFFAOYSA-M tetrapentylazanium;hydroxide Chemical compound [OH-].CCCCC[N+](CCCCC)(CCCCC)CCCCC JVOPCCBEQRRLOJ-UHFFFAOYSA-M 0.000 description 2
- OSBSFAARYOCBHB-UHFFFAOYSA-N tetrapropylammonium Chemical compound CCC[N+](CCC)(CCC)CCC OSBSFAARYOCBHB-UHFFFAOYSA-N 0.000 description 2
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 2
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
- C08J5/241—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres
- C08J5/244—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres using glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
- Y10T442/2893—Coated or impregnated polyamide fiber fabric
- Y10T442/2902—Aromatic polyamide fiber fabric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2926—Coated or impregnated inorganic fiber fabric
- Y10T442/2984—Coated or impregnated carbon or carbonaceous fiber fabric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2926—Coated or impregnated inorganic fiber fabric
- Y10T442/2992—Coated or impregnated glass fiber fabric
Definitions
- the invention relates to prepregs coloured with pigment or dye preparations and based on a storage-stable reactive or highly reactive polyurethane composition.
- Prepregs based on a storage-stable reactive or highly reactive polyurethane composition are known from DE 102009001793, DE 102009001806, DE 10201029355.
- the stated object is achieved with pigment or dye preparations which are suitable for powder coating applications and are already present in the course of prepreg production in the matrix material composition based on storage-stable reactive or highly reactive polyurethane compositions.
- a subject of the invention are coloured prepregs
- the production of the prepregs can in principle be effected by any process.
- a powdery polyurethane composition B) comprising the dyes and/or pigments is applied onto the support by powder impregnation, preferably by a dusting process.
- powder impregnation preferably by a dusting process.
- fluidized bed sinter processes, pultrusion or spray processes are also possible.
- the powder (as a whole or a fraction) is preferably applied by dusting processes onto the fibrous support, e.g. onto ribbons of glass, carbon or aramid fibre scrims/fabrics, and then fixed.
- the powder-treated fibrous support is preferably heated in a heated section (e.g. with IR rays) directly after the dusting procedure, so that the particles are sintered on, during which temperatures of 80 to 100° C. should not be exceeded, in order to prevent initiation of reaction of the highly reactive matrix material.
- a heated section e.g. with IR rays
- the production of the prepregs can also be effected by the direct melt impregnation process.
- the principle of the direct melt impregnation process for the prepregs consists in that firstly a reactive or highly reactive polyurethane composition B) comprising the dyes and/or pigments is produced from the individual components thereof in the melt. This melt of the reactive polyurethane composition B) comprising the dyes and/or pigments is then applied directly onto the fibrous support A), in other words an impregnation of the fibrous support A) with the melt from B) is effected. After this, the cooled storable prepregs can be further processed into composites at a later time.
- very good impregnation of the fibrous support takes place, due to the fact that the then liquid low viscosity reactive polyurethane compositions wet the fibres of the support very well.
- the production of the prepregs can also be effected using a solvent.
- the principle of the process for the production of prepregs then consists in that firstly a solution or dispersion comprising the reactive or highly reactive polyurethane composition B) comprising dyes and/or pigments is produced from the individual components thereof in a suitable common solvent. This solution or dispersion of the reactive polyurethane composition B) is then applied directly onto the fibrous support A), whereby the fibrous support becomes soaked/impregnated with this solution. Next, the solvent is removed. Preferably the solvent is removed completely at low temperature, preferably ⁇ 100° C., e.g. by heat treatment or application of a vacuum.
- the storable prepregs again freed from the solvent can be further processed to composites at a later time.
- very good impregnation of the fibrous support takes place, due to the fact that the solutions of the reactive polyurethane compositions wet the fibres of the support very well.
- aprotic liquids can be used which are not reactive towards the reactive polyurethane compositions, exhibit adequate solvent power towards the individual components of the reactive polyurethane composition used and can be removed from the prepreg impregnated with the reactive polyurethane composition during the solvent removal process step apart from slight traces ( ⁇ 0.5 weight %), whereby recycling of the separated solvent is advantageous.
- ketones acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclo-hexanone
- ethers tetrahydrofuran
- esters n-propyl acetate, n-butyl acetate, isobutyl acetate, 1,2-propylene carbonate, propylene glycol methyl ether acetate
- the prepregs according to the invention exhibit very high storage stability at room temperature, provided that the matrix material exhibits a Tg of at least 40° C.
- the reactive polyurethane composition contained this is at least a few days at room temperature, but as a rule the prepregs are storage-stable for several weeks at 40° C. and below.
- the prepregs thus produced are not sticky and are thus very good for handling and further processing.
- the reactive or highly reactive polyurethane compositions used according to the invention thus exhibit very good adhesion and distribution on the fibrous support.
- the prepregs thus produced can as required be combined into different forms and cut to size.
- the prepregs are cut to size, optionally sewn or otherwise fixed and compressed in a suitable mould under pressure and optionally application of vacuum.
- this procedure of the production of the composites from the prepregs is effected at temperatures of over about 160° C. with the use of reactive matrix materials (modification I) or at temperatures of over 100° C. with highly reactive matrix materials provided with appropriate catalysts (modification II).
- both the rate of the crosslinking reaction in the production of the composite components and also the properties of the matrix can be varied over wide ranges.
- the reactive or highly reactive polyurethane composition used for the production of the prepregs is defined as the matrix material, and in the description of the prepregs the still reactive or highly reactive polyurethane composition applied onto the fibres by the process according to the invention.
- the matrix is defined as the matrix materials from the reactive or highly reactive polyurethane compositions crosslinked in the composite.
- the fibrous support in the present invention consists of fibrous material (also often called reinforcing fibres).
- fibrous material also often called reinforcing fibres.
- any material of which the fibres consist is suitable, however, fibrous material of glass, carbon, plastics such as for example polyamide (aramid) or polyester, natural fibres or mineral fibre materials such as basalt fibres or ceramic fibres (oxide fibres based on aluminium oxides and/or silicon oxides) is preferably used.
- aramid polyamide
- mineral fibre materials such as basalt fibres or ceramic fibres (oxide fibres based on aluminium oxides and/or silicon oxides)
- Mixtures of fibre types such as for example fabric combinations of aramid and glass fibres, or carbon and glass fibres, can be used.
- hybrid composite components with prepregs of different fibrous supports can be produced.
- glass fibres are the most commonly used fibre types.
- all types of glass-based reinforcing fibres are suitable (E glass, S glass, R glass, M glass, C glass, ECR glass, D glass, AR glass, or hollow glass fibres).
- Carbon fibres are generally used in high performance composite materials, where the lower density in comparison to glass fibres with at the same time higher strength is also an important factor.
- Carbon fibres are industrially produced fibres made from carbon-containing starting materials which are converted by pyrolysis into carbon in graphite configuration.
- isotropic and anisotropic isotropic fibres have only low strength and lower industrial importance, anisotropic fibres exhibit high strength and rigidity with at the same time low elongation at break.
- aramid fibres are Nomex® and Kevlar® from DuPont, or Teijinconex®, Twaron® and Technora® from Teijin. Supports made of glass fibres, carbon fibres, aramid fibres or ceramic fibres are particularly suitable and preferred.
- the fibrous material is a flat textile sheet. Flat textile sheets of non-woven material, also so-called knitted goods, such as hosiery and knitted fabrics, but also non-knitted sheets such as woven fabrics, non-wovens or braided fabrics, are suitable.
- long-fibre and short-fibre materials as supports.
- rovings and yarns are also suitable according to the invention. All the said materials are suitable as fibrous supports in the context of the invention.
- An overview of reinforcing fibres is contained in “Composites Technologies, Paolo Ermanni (Version 4), Script for Lecture at ETH Zürich, August 2007, Chapter 7”.
- suitable polyurethane compositions consist of mixtures of a polymer b) (binder) having functional groups—reactive towards NCO groups, also described as resin, and di- or polyisocyanates that are temporarily deactivated, in other words internally blocked and/or blocked with blocking agents, also described as curing agents a) (component a)).
- binder As functional groups of the polymers b) (binder), hydroxyl groups, amino groups and thiol groups which react with the free isocyanate groups with addition and thus crosslink and cure the polyurethane composition are suitable.
- the binder components must be of a solid resin nature (glass transition temperature greater than room temperature).
- Possible binders are polyesters, polyethers, polyacrylates, polycarbonates and polyurethanes with an OH number of 20 to 500 mg KOH/gram and an average molecular weight of 250 to 6000 g/mole.
- Particularly preferably hydroxyl group-containing polyesters or polyacrylates with an OH number of 20 to 150 mg KOH/gram and an average molecular weight of 500 to 6000 g/mole are used.
- the quantity of the polymers b) having functional groups is selected such that for each functional group of the component b) 0.6 to 2 NCO equivalents or 0.3 to 1 uretdione group of the component a) is consumed.
- di and polyisocyanates that are blocked with blocking agents or internally blocked (uretdione) are used.
- the di and polyisocyanates used according to the invention can consist of any aromatic, aliphatic, cycloaliphatic and/or (cyclo)aliphatic di and/or polyisocyanates.
- aromatic di- or polyisocyanates in principle, all known aromatic compounds are suitable. Particularly suitable are 1,3- and 1,4-phenylene diisocyanate, 1,5-naphthylene diisocyanate, tolidine diisocyanate, 2,6-toluoylene diisocyanate, 2,4-toluoylene diisocyanate (2,4-TDI), 2,4′-diphenylmethane diisocyanate (2,4′-MDI), 4,4′-diphenylmethane diisocyanate, the mixtures of monomeric diphenylmethane diisocyanates (MDI) and oligomeric diphenylmethane diisocyanates (polymeric MDI), xylylene diisocyanate, tetramethylxylylene diisocyanate and triisocyanatotoluene.
- MDI monomeric diphenylmethane diisocyanates
- polymeric MDI oligomeric diphen
- Suitable aliphatic di- or polyisocyanates advantageously possess 3 to 16 carbon atoms, preferably 4 to 12 carbon atoms, in the linear or branched alkylene residue and suitable cycloaliphatic or (cyclo)aliphatic diisocyanates advantageously possess 4 to 18 carbon atoms, preferably 6 to 15 carbon atoms, in the cycloalkylene residue.
- (Cyclo)aliphatic diisocyanates are adequately understood by those skilled in the art simultaneously to mean cyclically and aliphatically bound NCO groups, as is for example the case with isophorone diisocyanate.
- cycloaliphatic diisocyanates are understood to mean those which only have NCO groups directly bound to the cycloaliphatic ring, e.g. H 12 MDI.
- Examples are cyclohexane diisocyanate, methylcyclohexane diisocyanate, ethylcyclohexane diisocyanate, propylcyclohexane diisocyanate, methyldiethylcyclohexane diisocyanate, propane diisocyanate, butane diisocyanate, pentane diisocyanate, hexane diisocyanate, heptane diisocyanate, octane diisocyanate, nonane diisocyanate, nonane triisocyanate, such as 4-isocyanatomethyl-1,8-octane diisocyanate (TIN), decane di and triisocyanate, undecane di and triisocyanate, and do
- IPDI Isophorone diisocyanate
- HDI hexamethylene diisocyanate
- H 12 MDI diisocyanatodicyclohexyl-methane
- MPDI 2-methylpentane diisocyanate
- TMDI 2,2,4-trimethylhexamethylene diisocyanate/2,4,4-trimethylhexamethylene diisocyanate
- NBDI norbornane diisocyanate
- mixtures of the di and polyisocyanates can also be used.
- oligo or polyisocyanates which can be produced from the said di- or polyisocyanates or mixtures thereof by linking by means of urethane, allophanate, urea, biuret, uretdione, amine, isocyanurate, carbodiimide, uretonimine, oxadiazinetrione or iminooxadiazinedione structures are preferably used.
- Isocyanurate in particular from IPDI and/or HDI, are particularly suitable.
- the polyisocyanates used according to the invention are blocked. Possible for this are external blocking agents, such as for example ethyl acetoacetate, diisopropylamine, methyl ethyl ketoxime, diethyl malonate, ⁇ -caprolactam, 1,2,4-triazole, phenol or substituted phenols and 3,5-dimethylpyrazole.
- external blocking agents such as for example ethyl acetoacetate, diisopropylamine, methyl ethyl ketoxime, diethyl malonate, ⁇ -caprolactam, 1,2,4-triazole, phenol or substituted phenols and 3,5-dimethylpyrazole.
- the curing agents preferably used are IPDI adducts which contain isocyanurate groups and ⁇ -caprolactam-blocked isocyanate structures.
- Internal blocking is also possible and this is preferably used.
- the internal blocking occurs via dimer formation via uretdione structures which at elevated temperature cleave back again to the isocyanate structures originally present and hence set the crosslinking with the binder in motion.
- the reactive polyurethane compositions can contain additional catalysts.
- organometallic catalysts such as for example dibutyl tin dilaurate (DBTL), tin octoate, bismuth neodecanoate, or else tertiary amines, such as for example 1,4-diazabicyclo[2.2.2]octane, in quantities of 0.001-1 wt. %.
- DBTL dibutyl tin dilaurate
- tin octoate bismuth neodecanoate
- tertiary amines such as for example 1,4-diazabicyclo[2.2.2]octane
- the additives usual in powder coating technology such as levelling agents, e.g. polysilicones or acrylates, light stabilizers e.g. sterically hindered amines, or other additives, such as were for example described in EP 669 353, can be added in a total quantity of 0.05 to 5 wt. %.
- reactive (modification I) means that the reactive polyurethane compositions used according to the invention as described above cure at temperatures beyond 160° C., depending on the nature of the support.
- the reactive polyurethane compositions according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C.
- the time for the curing of the polyurethane composition used according to the invention as a rule lies within 5 to 60 minutes.
- a matrix material B) is used made of a polyurethane composition B) containing uretdione groups, essentially containing
- Uretdione group-containing polyisocyanates are well known and are for example described in U.S. Pat. No. 4,476,054, U.S. Pat. No. 4,912,210, U.S. Pat. No. 4,929,724 and EP 417 603.
- a comprehensive overview concerning industrially relevant processes for the dimerization of isocyanates to uretdiones is given in J. Prakt. Chem. 336 (1994) 185-200.
- the conversion of isocyanates to uretdiones takes place in the presence of soluble dimerization catalysts such as for example dialkylaminopyridines, trialkylphosphines, phosphorous acid triamides or imidazoles.
- the reaction is stopped by addition of catalyst poisons on attainment of a desired conversion level. Excess monomeric isocyanate is then removed by short path evaporation. If the catalyst is sufficiently volatile, the reaction mixture can be freed from the catalyst in the course of the monomer removal. In this case the addition of catalyst poisons can be omitted.
- a broad range of isocyanates are suitable for the production of uretdione group-containing polyisocyanates. The aforesaid di and polyisocyanates can be used.
- IPDI isophorone diisocyanate
- HDI hexamethylene diisocyanate
- H 12 MDI diisocyanato-dicyclohexylmethane
- MPDI 2-methylpentane diisocyanate
- TMDI 2,2,4-trimethyl-hexamethylene diisocyanate/2,4,4-trimethylhexamethylene diisocyanate
- NBDI norbornane diisocyanate
- IPDI, HDI, TMDI and/or H 12 MDI are used, and the isocyanurates are also usable.
- IPDI and/or HDI are used for the matrix material.
- the conversion of these uretdione group-containing polyisocyanates to uretdione group-containing curing agents a) comprises the reaction of the free NCO groups with hydroxyl group-containing monomers or polymers, such as for example polyesters, polythioethers, polyethers, polycaprolactams, polyepoxides, polyester amides, polyurethanes or low molecular weight di, tri and/or tetrahydric alcohols as chain extenders and optionally monoamines and/or monohydric alcohols as chain terminators and has already often been described (EP 669 353, EP 669 354, DE 30 30 572, EP 639 598 or EP 803 524).
- Preferred curing agents a) having uretdione groups have a free NCO content of less than 5 wt. % and a content of uretdione groups of 3 to 25 wt. %, preferably 6 to 18 wt. % (calculated as C 2 N 2 O 2 , molecular weight 84). Polyesters and monomeric dihydric alcohols are preferred. Apart from the uretdione groups, the curing agents can also have isocyanurate, biuret, allophanate, urethane and/or urea structures.
- polyesters, polyethers, polyacrylates, polyurethanes and/or polycarbonates with an OH number of 20-200 in mg KOH/gram are preferably used.
- Polyesters with an OH number of 30-150 and an average molecular weight of 500-6000 g/mole which are in solid form below 40° C. and in liquid form above 125° C. are particularly preferably used.
- Such binders have for example been described in EP 669 354 and EP 254 152. Of course, mixtures of such polymers can also be used.
- the quantity of the hydroxyl group-containing polymers b) is selected such that for each hydroxyl group of the component b) 0.3 to 1 uretdione group of the component a), preferably 0.45 to 0.55, is consumed.
- additional catalysts c) can be contained in the reactive polyurethane compositions B) according to the invention. These are organometallic catalysts such as for example dibutyltin dilaurate, zinc octoate, bismuth neodecanoate, or else tertiary amines such as for example 1,4-diazabicyclo[2.2.2.]octane, in quantities of 0.001-1 wt. %. These reactive polyurethane compositions used according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C. and designated as modification I.
- the additives usual in powder coating technology e.g. polysilicones or acrylates, light stabilizers e.g. sterically hindered amines, or other additives, such as were for example described in EP 669 353, can be added in a total quantity of 0.05 to 5 wt. %.
- the reactive polyurethane compositions used according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C.
- the reactive polyurethane compositions used according to the invention provide very good flow and hence good impregnation behaviour and in the cured state excellent chemicals resistance.
- aliphatic crosslinking agents e.g. IPDI or H 12 MDI
- a matrix material which is made from
- Suitable highly reactive uretdione group-containing polyurethane compositions according to the invention contain mixtures of temporarily deactivated, that is uretdione group-containing (internally blocked) di- or polyisocyanates, also described as curing agents a), and the catalysts c) and d) contained according to the invention and optionally in addition a polymer (binder) having functional groups—reactive towards NCO groups—also described as resin b).
- the catalysts ensure curing of the uretdione group-containing polyurethane compositions at low temperature.
- the uretdione group-containing polyurethane compositions are thus highly reactive.
- component a) and b) those such as described above are used.
- quaternary ammonium salts preferably tetraalkylammonium salts and/or quaternary phosphonium salts with halogens, hydroxides, alcoholates or organic or inorganic acid anions as counter-ion, are used. Examples of these are:
- the content of catalysts c) can be 0.1 to 5 wt. %, preferably from 0.3 to 2 wt. %, based on the total formulation of the matrix material.
- One modification according to the invention also includes the binding of such catalysts c) to the functional groups of the polymers b). Apart from this, these catalysts can be surrounded by an inert shell and be enapsulated thereby.
- epoxides are used. Possible here are for example glycidyl ethers and glycidyl esters, aliphatic epoxides, diglycidyl ethers based on bisphenol A and glycidyl methacrylates.
- epoxides examples include triglycidyl isocyanurate (TGIC, trade name ARALDIT 810, Huntsman), mixtures of diglycidyl terephthalate and triglycidyl trimellitate (trade name ARALDIT PT 910 and 912, Huntsman), glycidyl esters of versatic acid (trade name KARDURA E10, Shell), 3,4-epoxycyclohexylmethyl 3′,4′-epoxycyclohexanecarboxylate (ECC), diglycidyl ethers based on bisphenol A (trade name EPIKOTE 828, Shell), ethylhexyl glycidyl ether, butyl glycidyl ether, pentaerythritol tetraglycidyl ether (trade name POLYPDX R 16, UPPC AG) and other polypox types with free epoxy groups. Mixtures can also be used.
- metal acetylacetonates are possible. Examples of these are zinc acetylacetonate, lithium acetylacetonate and tin acetylacetonate, alone or in mixtures. Zinc acetylacetonate is preferably used.
- quaternary ammonium acetylacetonates or quaternary phosphonium acetylacetonates are also possible.
- Such catalysts are tetramethylammonium acetylacetonate, tetraethylammonium acetylacetonate, tetrapropylammonium acetylacetonate, tetrabutylammonium acetylacetonate, benzyltrimethylammonium acetylacetonate, benzyltriethylammonium acetylacetonate, tetramethylphosphonium acetylacetonate, tetraethylphosphonium acetylacetonate, tetrapropylphosphonium acetylacetonate, tetrabutylphosphonium acetylacetonate, benzyltrimethylphosphonium acetylacetonate and benzyltriethylphosphonium acetylacetonate. Particularly preferably, tetraethylammonium acetylacet
- the quantity of cocatalysts d1) and/or d2) can be from 0.1 to 5 wt. %, preferably from 0.3 to 2 wt. %, based on the total formulation of the matrix material.
- highly reactive means that the uretdione group-containing polyurethane compositions used according to the invention cure at temperatures from 100 to 160° C., depending on the nature of the support.
- This curing temperature is preferably 120 to 150° C., particularly preferably from 130 to 140° C.
- the time for the curing of the polyurethane composition used according to the invention lies within from 5 to 60 minutes.
- the highly reactive uretdione group-containing polyurethane compositions B) used according to the invention provide very good flow and hence good impregnation behaviour and in the cured state excellent chemicals resistance.
- aliphatic crosslinking agents e.g. IPDI or H 12 MDI
- Suitable pigments are in principle all known pigments.
- the pigments from the known classes of the natural and synthetic inorganic pigments are employed.
- Useful natural pigments include earth colours, for example, green earth, yellow ochre or umber, and also mineral colours, for example iron oxides, malachite or cinnabar.
- inorganic synthetic pigments for example carbon black, chromium pigments, cobalt pigments, iron pigments, ultramarine blue, or white pigments, for example titanium dioxide.
- natural organic pigments and synthetic organic pigments such as azo pigments (brilliant yellow, permanent red), polycyclic pigments (phthalocyanine blue, heliogen green) or diketopyrrolopyrrole pigments.
- metal effect pigments or pearlescent pigments are employed.
- pigments examples include Prussian blue (pigment blue 27 C.I. 77510), brilliant yellow (pigment yellow 74 C.I. 11741), cadmium yellow (pigment yellow 35 C.I. 77205), cadmium red (pigment red 108 C.I. 77202), chromium oxide green (pigment green 17 C.I. 77288), cobalt blue (pigment blue 28 C.I. 77346), cobalt blue turquoise light (pigment blue 36 C.I. 77343), cobalt violet light (pigment violet 49 C.I. 77362), iron oxide black (pigment black 11 C.I. 77499), irgazine red (pigment red 254 C.I.
- Suitable dyes are all known dyes, especially reactive dyes, disperse dyes, pigment dyes, acid dyes, developing dyes, cationic or basic dyes, coupling dyes, mordant dyes, vat dyes, metal complex dyes, substantive dyes.
- Important classes of dyes useable in the context of the invention are anthraquinone dyes, azo dyes, dioxazine dyes, indigo dyes, nitro dyes, nitroso dyes, phthalocyanine dyes, sulphur dyes, triphenylmethane dyes.
- Dyes and pigments especially suitable for powder coating applications are detailed, for example, in the documents from Clariant “Colorants for Powder Coatings” (2005) and from BASF “Colorants and additives from BASF for powder coatings” (2008).
- dyes have an at least limited light stability or weathering stability which limits direct outdoor use of the composite components produced from the correspondingly coloured prepregs according to the invention.
- the dyes are present in an amount of 15 up to % by weight in the matrix material B).
- Pigments are present in an amount of 0.5 up to 20% by weight in the matrix material B).
- the production of the matrix material can be effected as follows: the homogenization of all components for the production of the polyurethane composition B) can be effected in suitable units, such as for example heatable stirred vessels, kneaders, or even extruders, during which temperature upper limits of 120 to 130° C. should not be exceeded.
- suitable units such as for example heatable stirred vessels, kneaders, or even extruders, during which temperature upper limits of 120 to 130° C. should not be exceeded.
- the mixing of the individual components is preferably effected in an extruder at temperatures which are above the melting ranges of the individual components, but below the temperature at which the crosslinking reaction starts. Use directly from the melt or after cooling and production of a powder is possible thereafter.
- the production of the polyurethane composition B) can also be effected in a solvent by mixing in the aforesaid units.
- the matrix material B) with the support A) is processed into the prepregs.
- the prepregs according to the invention and also the composite components have a fibre content by volume of greater than 50%, preferably of greater than 50-70%, particularly preferably of 50 to 65%.
- the reactive or highly reactive polyurethane compositions used according to the invention as matrix material essentially consist of a mixture of a reactive resin and a curing agent. After melt homogenization, this mixture has a Tg of at least 40° C. and as a rule reacts only above 160° C. in the case of the reactive polyurethane compositions, or above 100° C. in the case of the highly reactive polyurethane compositions, to give a crosslinked polyurethane and thus forms the matrix of the composite.
- the prepregs according to the invention after their production are made up of the support and the applied reactive polyurethane composition as matrix material, which is present in noncrosslinked but reactive form.
- the prepregs are thus storage-stable, as a rule for several days and even weeks and can thus at any time be further processed into composites. This is the essential difference from the 2-component systems already described above, which are reactive and not storage-stable, since after application these immediately start to react and crosslink to give polyurethanes.
- the production of the prepregs according to the invention can be performed by means of the known plants and equipment by reaction injection moulding (RIM), reinforced reaction injection moulding (RRIM), pultrusion processes, by application of the solution in a cylinder mill or by means of a hot doctor knife, or other processes.
- RIM reaction injection moulding
- RRIM reinforced reaction injection moulding
- pultrusion processes by application of the solution in a cylinder mill or by means of a hot doctor knife, or other processes.
- prepregs in particular with fibrous supports of glass, carbon or aramid fibres.
- Also subject matter of the invention is the use of the prepregs produced according to the invention, for the production of composites in boat and shipbuilding, in aerospace technology, in automobile manufacture, and for two-wheel vehicles, preferably motorcycles and bicycles, and in the automotive, construction, medical engineering and sport fields, electrical and electronics industry, and power generating plants, e.g. for rotor blades in wind power plants.
- a reactive polyurethane composition with the following formula was used for the production of the prepregs and the composites.
- the milled ingredients from the table are intimately mixed in a premixer and then homogenized in the extruder up to a maximum of 130° C.
- This reactive polyurethane composition can then after milling be used for the production of the prepregs by the powder impregnation process.
- the homogenized melt mixture produced in the extruder can be used directly.
- no upstream melt homogenization is required for the direct melt impregnation.
- the DSC tests (glass transition temperature determinations and enthalpy of reaction measurements) are performed with a Mettler Toledo DSC 821e as per DIN 53765.
- the glass transition temperature of the extrudate was determined to 62° C.; the reaction enthalpy for the crosslinking reaction in the fresh state was 65.5 J/g.
- glass fibre scrims and glass fibre fabrics were used in the examples and are referred to below as type I and type II.
- Type I is a linen E glass fabric 281 L Art. No. 3103 from “Schlösser & Cramer”.
- the fabric has an areal weight of 280 g/m 2 .
- Type II GBX 600 Art. No. 1023 is a sewn biaxial E glass scrim ( ⁇ 45/+45) from “Schlösser & Cramer”. This should be understood to mean two layers of fibre bundles which lie one over the other and are set at an angle of 90 degrees to one another. This structure is held together by other fibres, which do not however consist of glass. The surface of the glass fibres is treated with a standard size which is aminosilane-modified. The scrim has an areal weight of 600 g/m 2 .
- the production of the prepregs is effected by direct melt impregnation processes according to DE 102010029355.
- the storage stability of the prepregs was determined from the glass transition temperatures and the enthalpies of reaction of the crosslinking reaction by means of DSC studies.
- the crosslinking capacity of the PU prepregs is not impaired by storage at room temperature for a period of 5 weeks.
- the composite components are produced on a composite press by a compression technique known to those skilled in the art.
- the homogeneous prepregs produced by direct impregnation were compressed into composite materials on a benchtop press.
- This benchtop press is the Polystat 200 T from the firm Schwabenthan, with which the prepregs are compressed to the corresponding composite sheets at temperatures between 120 and 200° C.
- the pressure is varied between normal pressure and 450 bar. Dynamic compression, i.e. alternating applications of pressure, can prove advantageous for the crosslinking of the fibres depending on the component size, thickness and polyurethane composition and hence the viscosity setting at the processing temperature.
- the temperature of the press is increased from 90° C. during the melting phase to 110° C.
- the pressure is increased to 440 bar after a melting phase of 3 minutes and then dynamically varied (7 times each of 1 minute duration) between 150 and 440 bar, during which the temperature is continuously increased to 140° C.
- the temperature is raised to 180° C. and at the same time the pressure is held at 350 bar until the removal of the composite component from the press after 30 minutes.
- the hard, rigid, chemicals resistant and impact resistant composite components (sheet products) with a fibre volume content of >50% are tested for the degree of curing (determination by DSC).
- the determination of the glass transition temperature of the cured matrix indicates the progress of the crosslinking at different curing temperatures. With the polyurethane composition used, the crosslinking is complete after ca. 25 minutes, and then an enthalpy of reaction for the crosslinking reaction is also no longer detectable.
Abstract
The invention relates to prepregs coloured with pigment or dye preparations and based on a storage-stable reactive or highly reactive polyurethane composition.
Description
- The invention relates to prepregs coloured with pigment or dye preparations and based on a storage-stable reactive or highly reactive polyurethane composition.
- Prepregs based on a storage-stable reactive or highly reactive polyurethane composition are known from DE 102009001793, DE 102009001806, DE 10201029355.
- It was an object of the present invention to enable the production of coloured prepregs based on a storage-stable reactive or highly reactive polyurethane composition.
- The stated object is achieved with pigment or dye preparations which are suitable for powder coating applications and are already present in the course of prepreg production in the matrix material composition based on storage-stable reactive or highly reactive polyurethane compositions.
- A subject of the invention are coloured prepregs,
- essentially made up of
- A) at least one fibrous support
- and
- B) at least one reactive or highly reactive polyurethane composition as matrix material, wherein the polyurethane compositions essentially contain mixtures of a polymer b) having functional groups reactive towards isocyanates as binder and di- or polyisocyanate internally blocked and/or blocked with blocking agents as curing agent a),
- wherein the matrix material additionally comprises
- 1. pigments having a particle diameter of <150 nm
- and/or
- 2. dyes.
- The production of the prepregs can in principle be effected by any process.
- In a suitable manner, a powdery polyurethane composition B) comprising the dyes and/or pigments is applied onto the support by powder impregnation, preferably by a dusting process. Also possible are fluidized bed sinter processes, pultrusion or spray processes. The powder (as a whole or a fraction) is preferably applied by dusting processes onto the fibrous support, e.g. onto ribbons of glass, carbon or aramid fibre scrims/fabrics, and then fixed. For avoidance of powder losses, the powder-treated fibrous support is preferably heated in a heated section (e.g. with IR rays) directly after the dusting procedure, so that the particles are sintered on, during which temperatures of 80 to 100° C. should not be exceeded, in order to prevent initiation of reaction of the highly reactive matrix material. These prepregs can as required be combined into different forms and cut to size.
- The production of the prepregs can also be effected by the direct melt impregnation process. The principle of the direct melt impregnation process for the prepregs consists in that firstly a reactive or highly reactive polyurethane composition B) comprising the dyes and/or pigments is produced from the individual components thereof in the melt. This melt of the reactive polyurethane composition B) comprising the dyes and/or pigments is then applied directly onto the fibrous support A), in other words an impregnation of the fibrous support A) with the melt from B) is effected. After this, the cooled storable prepregs can be further processed into composites at a later time. Through the direct melt impregnation process according to the invention, very good impregnation of the fibrous support takes place, due to the fact that the then liquid low viscosity reactive polyurethane compositions wet the fibres of the support very well.
- The production of the prepregs can also be effected using a solvent. The principle of the process for the production of prepregs then consists in that firstly a solution or dispersion comprising the reactive or highly reactive polyurethane composition B) comprising dyes and/or pigments is produced from the individual components thereof in a suitable common solvent. This solution or dispersion of the reactive polyurethane composition B) is then applied directly onto the fibrous support A), whereby the fibrous support becomes soaked/impregnated with this solution. Next, the solvent is removed. Preferably the solvent is removed completely at low temperature, preferably <100° C., e.g. by heat treatment or application of a vacuum. After this, the storable prepregs again freed from the solvent can be further processed to composites at a later time. Through the process according to the invention, very good impregnation of the fibrous support takes place, due to the fact that the solutions of the reactive polyurethane compositions wet the fibres of the support very well.
- As suitable solvents for the process according to the invention, all aprotic liquids can be used which are not reactive towards the reactive polyurethane compositions, exhibit adequate solvent power towards the individual components of the reactive polyurethane composition used and can be removed from the prepreg impregnated with the reactive polyurethane composition during the solvent removal process step apart from slight traces (<0.5 weight %), whereby recycling of the separated solvent is advantageous.
- By way of example, ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclo-hexanone), ethers (tetrahydrofuran), esters (n-propyl acetate, n-butyl acetate, isobutyl acetate, 1,2-propylene carbonate, propylene glycol methyl ether acetate) may be mentioned here.
- After cooling to room temperature, the prepregs according to the invention exhibit very high storage stability at room temperature, provided that the matrix material exhibits a Tg of at least 40° C. Depending on the reactive polyurethane composition contained this is at least a few days at room temperature, but as a rule the prepregs are storage-stable for several weeks at 40° C. and below. The prepregs thus produced are not sticky and are thus very good for handling and further processing. The reactive or highly reactive polyurethane compositions used according to the invention thus exhibit very good adhesion and distribution on the fibrous support.
- During the further processing of the prepregs to composites (composite materials) e.g. by pressing at elevated temperatures, very good impregnation of the fibrous support takes place, due to the fact that the then liquid low viscosity reactive or highly reactive polyurethane compositions before the crosslinking reaction wet the fibres of the support very well, before gelling occurs or the complete polyurethane matrix cures fully due to the crosslinking reaction of the reactive or highly reactive polyurethane composition at elevated temperatures.
- The prepregs thus produced can as required be combined into different forms and cut to size.
- For the consolidation of the prepregs into a single composite and the crosslinking of the matrix material to give the matrix, the prepregs are cut to size, optionally sewn or otherwise fixed and compressed in a suitable mould under pressure and optionally application of vacuum. In the context of this invention, depending on the curing time this procedure of the production of the composites from the prepregs is effected at temperatures of over about 160° C. with the use of reactive matrix materials (modification I) or at temperatures of over 100° C. with highly reactive matrix materials provided with appropriate catalysts (modification II).
- Depending on the composition of the reactive or highly reactive polyurethane composition used and optionally added catalysts, both the rate of the crosslinking reaction in the production of the composite components and also the properties of the matrix can be varied over wide ranges.
- In the context of the invention, the reactive or highly reactive polyurethane composition used for the production of the prepregs is defined as the matrix material, and in the description of the prepregs the still reactive or highly reactive polyurethane composition applied onto the fibres by the process according to the invention.
- The matrix is defined as the matrix materials from the reactive or highly reactive polyurethane compositions crosslinked in the composite.
- The fibrous support in the present invention consists of fibrous material (also often called reinforcing fibres). In general, any material of which the fibres consist is suitable, however, fibrous material of glass, carbon, plastics such as for example polyamide (aramid) or polyester, natural fibres or mineral fibre materials such as basalt fibres or ceramic fibres (oxide fibres based on aluminium oxides and/or silicon oxides) is preferably used. Mixtures of fibre types, such as for example fabric combinations of aramid and glass fibres, or carbon and glass fibres, can be used. Likewise, hybrid composite components with prepregs of different fibrous supports can be produced.
- Mainly because of their relatively low price, glass fibres are the most commonly used fibre types. In principle here, all types of glass-based reinforcing fibres are suitable (E glass, S glass, R glass, M glass, C glass, ECR glass, D glass, AR glass, or hollow glass fibres). Carbon fibres are generally used in high performance composite materials, where the lower density in comparison to glass fibres with at the same time higher strength is also an important factor. Carbon fibres are industrially produced fibres made from carbon-containing starting materials which are converted by pyrolysis into carbon in graphite configuration. A distinction is made between isotropic and anisotropic: isotropic fibres have only low strength and lower industrial importance, anisotropic fibres exhibit high strength and rigidity with at the same time low elongation at break. Here all textile fibres and fibre materials obtained from plant and animal material (e.g. wood, cellulose, cotton, hemp, jute, flax, sisal or bamboo fibres) are described as natural fibres. Similarly also to carbon fibres, aramid fibres exhibit a negative coefficient of thermal expansion, i.e. become shorter on heating. Their specific strength and modulus of elasticity are markedly lower than that of carbon fibres. In combination with the positive coefficient of expansion of the matrix resin, highly dimensionally stable components can be manufactured. Compared to carbon fibre-reinforced plastics, the compressive strength of aramid fibre composite materials is markedly lower. Well-known brand names for aramid fibres are Nomex® and Kevlar® from DuPont, or Teijinconex®, Twaron® and Technora® from Teijin. Supports made of glass fibres, carbon fibres, aramid fibres or ceramic fibres are particularly suitable and preferred. The fibrous material is a flat textile sheet. Flat textile sheets of non-woven material, also so-called knitted goods, such as hosiery and knitted fabrics, but also non-knitted sheets such as woven fabrics, non-wovens or braided fabrics, are suitable. In addition, a distinction is made between long-fibre and short-fibre materials as supports. Also suitable according to the invention are rovings and yarns. All the said materials are suitable as fibrous supports in the context of the invention. An overview of reinforcing fibres is contained in “Composites Technologies, Paolo Ermanni (Version 4), Script for Lecture at ETH Zürich, August 2007, Chapter 7”.
- In principle, all reactive or highly reactive polyurethane compositions, even others which are storage-stable at room temperature, are suitable as matrix materials. According to the invention, suitable polyurethane compositions consist of mixtures of a polymer b) (binder) having functional groups—reactive towards NCO groups, also described as resin, and di- or polyisocyanates that are temporarily deactivated, in other words internally blocked and/or blocked with blocking agents, also described as curing agents a) (component a)).
- As functional groups of the polymers b) (binder), hydroxyl groups, amino groups and thiol groups which react with the free isocyanate groups with addition and thus crosslink and cure the polyurethane composition are suitable. The binder components must be of a solid resin nature (glass transition temperature greater than room temperature). Possible binders are polyesters, polyethers, polyacrylates, polycarbonates and polyurethanes with an OH number of 20 to 500 mg KOH/gram and an average molecular weight of 250 to 6000 g/mole. Particularly preferably hydroxyl group-containing polyesters or polyacrylates with an OH number of 20 to 150 mg KOH/gram and an average molecular weight of 500 to 6000 g/mole are used. Of course, mixtures of such polymers can also be used. The quantity of the polymers b) having functional groups is selected such that for each functional group of the component b) 0.6 to 2 NCO equivalents or 0.3 to 1 uretdione group of the component a) is consumed.
- As the curing component a), di and polyisocyanates that are blocked with blocking agents or internally blocked (uretdione) are used.
- The di and polyisocyanates used according to the invention can consist of any aromatic, aliphatic, cycloaliphatic and/or (cyclo)aliphatic di and/or polyisocyanates.
- As aromatic di- or polyisocyanates, in principle, all known aromatic compounds are suitable. Particularly suitable are 1,3- and 1,4-phenylene diisocyanate, 1,5-naphthylene diisocyanate, tolidine diisocyanate, 2,6-toluoylene diisocyanate, 2,4-toluoylene diisocyanate (2,4-TDI), 2,4′-diphenylmethane diisocyanate (2,4′-MDI), 4,4′-diphenylmethane diisocyanate, the mixtures of monomeric diphenylmethane diisocyanates (MDI) and oligomeric diphenylmethane diisocyanates (polymeric MDI), xylylene diisocyanate, tetramethylxylylene diisocyanate and triisocyanatotoluene.
- Suitable aliphatic di- or polyisocyanates advantageously possess 3 to 16 carbon atoms, preferably 4 to 12 carbon atoms, in the linear or branched alkylene residue and suitable cycloaliphatic or (cyclo)aliphatic diisocyanates advantageously possess 4 to 18 carbon atoms, preferably 6 to 15 carbon atoms, in the cycloalkylene residue. (Cyclo)aliphatic diisocyanates are adequately understood by those skilled in the art simultaneously to mean cyclically and aliphatically bound NCO groups, as is for example the case with isophorone diisocyanate. In contrast, cycloaliphatic diisocyanates are understood to mean those which only have NCO groups directly bound to the cycloaliphatic ring, e.g. H12MDI. Examples are cyclohexane diisocyanate, methylcyclohexane diisocyanate, ethylcyclohexane diisocyanate, propylcyclohexane diisocyanate, methyldiethylcyclohexane diisocyanate, propane diisocyanate, butane diisocyanate, pentane diisocyanate, hexane diisocyanate, heptane diisocyanate, octane diisocyanate, nonane diisocyanate, nonane triisocyanate, such as 4-isocyanatomethyl-1,8-octane diisocyanate (TIN), decane di and triisocyanate, undecane di and triisocyanate, and dodecane di and triisocyanate.
- Isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), diisocyanatodicyclohexyl-methane (H12MDI), 2-methylpentane diisocyanate (MPDI), 2,2,4-trimethylhexamethylene diisocyanate/2,4,4-trimethylhexamethylene diisocyanate (TMDI) and norbornane diisocyanate (NBDI) are preferred. Quite particularly preferably IPDI, HDI, TMDI and/or H12MDI are used, and the isocyanurates are also usable. Also suitable are 4-methyl-cyclohexane 1,3-diisocyanate, 2-butyl-2-ethylpentamethylene diisocyanate, 3(4)-isocyanatomethyl-1-methylcyclohexyl isocyanate, 2-isocyanatopropylcyclohexyl isocyanate, 2,4′-methylenebis(cyclohexyl)diisocyanate and 1,4-diisocyanato-4-methylpentane.
- Of course, mixtures of the di and polyisocyanates can also be used.
- Further, oligo or polyisocyanates which can be produced from the said di- or polyisocyanates or mixtures thereof by linking by means of urethane, allophanate, urea, biuret, uretdione, amine, isocyanurate, carbodiimide, uretonimine, oxadiazinetrione or iminooxadiazinedione structures are preferably used. Isocyanurate, in particular from IPDI and/or HDI, are particularly suitable.
- The polyisocyanates used according to the invention are blocked. Possible for this are external blocking agents, such as for example ethyl acetoacetate, diisopropylamine, methyl ethyl ketoxime, diethyl malonate, ε-caprolactam, 1,2,4-triazole, phenol or substituted phenols and 3,5-dimethylpyrazole.
- The curing agents preferably used are IPDI adducts which contain isocyanurate groups and ε-caprolactam-blocked isocyanate structures.
- Internal blocking is also possible and this is preferably used. The internal blocking occurs via dimer formation via uretdione structures which at elevated temperature cleave back again to the isocyanate structures originally present and hence set the crosslinking with the binder in motion.
- Optionally, the reactive polyurethane compositions can contain additional catalysts. These are organometallic catalysts, such as for example dibutyl tin dilaurate (DBTL), tin octoate, bismuth neodecanoate, or else tertiary amines, such as for example 1,4-diazabicyclo[2.2.2]octane, in quantities of 0.001-1 wt. %. These reactive polyurethane compositions used according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C. and designated as modification I.
- For the production of the reactive polyurethane compositions, the additives usual in powder coating technology, such as levelling agents, e.g. polysilicones or acrylates, light stabilizers e.g. sterically hindered amines, or other additives, such as were for example described in EP 669 353, can be added in a total quantity of 0.05 to 5 wt. %.
- In the context of this invention, reactive (modification I) means that the reactive polyurethane compositions used according to the invention as described above cure at temperatures beyond 160° C., depending on the nature of the support.
- The reactive polyurethane compositions according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C. The time for the curing of the polyurethane composition used according to the invention as a rule lies within 5 to 60 minutes.
- Preferably in the present invention a matrix material B) is used made of a polyurethane composition B) containing uretdione groups, essentially containing
- a) at least one uretdione group-containing curing agent, based on polyaddition compounds from aliphatic, (cyclo)aliphatic or cycloaliphatic uretdione group-containing polyisocyanates and hydroxyl group-containing compounds, wherein the curing agent is in solid form below 40° C. and in liquid form above 125° C. and has a free NCO content of less than 5 wt. % and a uretdione content of 3-25 wt. %,
- b) at least one hydroxyl group-containing polymer which is in solid form below 40° C. and in liquid form above 125° C. and has an OH number between 20 and 200 mg KOH/gram,
- c) optionally at least one catalyst, and
- d) optionally auxiliary agents and additives known from polyurethane chemistry,
so that the two components a) and b) are present in the ratio such that for each hydroxyl group of the component b) 0.3 to 1 uretdione group of the component a) is consumed, preferably 0.45 to 0.55. The latter corresponds to a NCO/OH ratio of 0.9 to 1.1 to 1. - Uretdione group-containing polyisocyanates are well known and are for example described in U.S. Pat. No. 4,476,054, U.S. Pat. No. 4,912,210, U.S. Pat. No. 4,929,724 and EP 417 603. A comprehensive overview concerning industrially relevant processes for the dimerization of isocyanates to uretdiones is given in J. Prakt. Chem. 336 (1994) 185-200. In general, the conversion of isocyanates to uretdiones takes place in the presence of soluble dimerization catalysts such as for example dialkylaminopyridines, trialkylphosphines, phosphorous acid triamides or imidazoles. The reaction—optionally performed in solvents, but preferably in the absence of solvents—is stopped by addition of catalyst poisons on attainment of a desired conversion level. Excess monomeric isocyanate is then removed by short path evaporation. If the catalyst is sufficiently volatile, the reaction mixture can be freed from the catalyst in the course of the monomer removal. In this case the addition of catalyst poisons can be omitted. Essentially, a broad range of isocyanates are suitable for the production of uretdione group-containing polyisocyanates. The aforesaid di and polyisocyanates can be used. However, di and polyisocyanates from any aliphatic, cyclo-aliphatic and/or (cyclo)aliphatic di and/or polyisocyanates are preferable. According to the invention, isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), diisocyanato-dicyclohexylmethane (H12MDI), 2-methylpentane diisocyanate (MPDI), 2,2,4-trimethyl-hexamethylene diisocyanate/2,4,4-trimethylhexamethylene diisocyanate (TMDI) or norbornane diisocyanate (NBDI) are used. Quite particularly preferably, IPDI, HDI, TMDI and/or H12MDI are used, and the isocyanurates are also usable.
- Quite particularly preferably, IPDI and/or HDI are used for the matrix material. The conversion of these uretdione group-containing polyisocyanates to uretdione group-containing curing agents a) comprises the reaction of the free NCO groups with hydroxyl group-containing monomers or polymers, such as for example polyesters, polythioethers, polyethers, polycaprolactams, polyepoxides, polyester amides, polyurethanes or low molecular weight di, tri and/or tetrahydric alcohols as chain extenders and optionally monoamines and/or monohydric alcohols as chain terminators and has already often been described (EP 669 353, EP 669 354, DE 30 30 572, EP 639 598 or EP 803 524).
- Preferred curing agents a) having uretdione groups have a free NCO content of less than 5 wt. % and a content of uretdione groups of 3 to 25 wt. %, preferably 6 to 18 wt. % (calculated as C2N2O2, molecular weight 84). Polyesters and monomeric dihydric alcohols are preferred. Apart from the uretdione groups, the curing agents can also have isocyanurate, biuret, allophanate, urethane and/or urea structures.
- For the hydroxyl group-containing polymers b), polyesters, polyethers, polyacrylates, polyurethanes and/or polycarbonates with an OH number of 20-200 in mg KOH/gram are preferably used. Polyesters with an OH number of 30-150 and an average molecular weight of 500-6000 g/mole which are in solid form below 40° C. and in liquid form above 125° C. are particularly preferably used. Such binders have for example been described in EP 669 354 and EP 254 152. Of course, mixtures of such polymers can also be used. The quantity of the hydroxyl group-containing polymers b) is selected such that for each hydroxyl group of the component b) 0.3 to 1 uretdione group of the component a), preferably 0.45 to 0.55, is consumed. Optionally, additional catalysts c) can be contained in the reactive polyurethane compositions B) according to the invention. These are organometallic catalysts such as for example dibutyltin dilaurate, zinc octoate, bismuth neodecanoate, or else tertiary amines such as for example 1,4-diazabicyclo[2.2.2.]octane, in quantities of 0.001-1 wt. %. These reactive polyurethane compositions used according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C. and designated as modification I.
- For the production of the reactive and highly reactive polyurethane compositions according to the invention, the additives usual in powder coating technology, e.g. polysilicones or acrylates, light stabilizers e.g. sterically hindered amines, or other additives, such as were for example described in EP 669 353, can be added in a total quantity of 0.05 to 5 wt. %.
- The reactive polyurethane compositions used according to the invention are cured under normal conditions, e.g. with DBTL catalysis, beyond 160° C., usually beyond ca. 180° C. The reactive polyurethane compositions used according to the invention provide very good flow and hence good impregnation behaviour and in the cured state excellent chemicals resistance. In addition, with the use of aliphatic crosslinking agents (e.g. IPDI or H12MDI) good weather resistance is also achieved.
- Particularly preferably in the invention a matrix material is used which is made from
- B) at least one highly reactive uretdione group-containing polyurethane composition,
- essentially containing
- a) at least one uretdione group-containing curing agent
- and
- b) optionally at least one polymer with functional groups reactive towards NCO groups;
- c) 0.1 to 5 wt. % of at least one catalyst selected from quaternary ammonium salts and/or quaternary phosphonium salts with halogens, hydroxides, alcoholates or organic or inorganic acid anions as counter-ion;
- and
- d) 0.1 to 5 wt. % of at least one cocatalyst, selected from
- d1) at least one epoxide
- and/or
- d2) at least one metal acetylacetonate and/or quaternary ammonium acetylacetonate and/or quaternary phosphonium acetylacetonate; and
- e) optionally auxiliary agents and additives known from polyurethane chemistry.
- Quite especially, a matrix material B) made from
- B) at least one highly reactive powdery uretdione group-containing polyurethane composition as matrix material, essentially containing
- a) at least one uretdione group-containing curing agent, based on polyaddition compounds from aliphatic, (cyclo)aliphatic or cycloaliphatic uretdione group-containing polyisocyanates and hydroxyl group-containing compounds, wherein the curing agent is in solid form below 40° C. and in liquid form above 125° C. and has a free NCO content of less than 5 wt. % and a uretdione content of 3-25 wt. %,
- b) at least one hydroxyl group-containing polymer which is in solid form below 40° C. and in liquid form above 125° C. and has an OH number between 20 and 200 mg KOH/gram;
- c) 0.1 to 5 wt. % of at least one catalyst selected from quaternary ammonium salts and/or quaternary phosphonium salts with halogens, hydroxides, alcoholates or organic or inorganic acid anions as counter-ion;
- and
- d) 0.1 to 5 wt. % of at least one cocatalyst, selected from
- d1) at least one epoxide
- and/or
- d2) at least one metal acetylacetonate and/or quaternary ammonium acetylacetonate and/or quaternary phosphonium acetylacetonate; and
- e) optionally auxiliary agents and additives known from polyurethane chemistry,
is used so that the two components a) and b) are present in the ratio such that for each hydroxyl group of the component b) 0.3 to 1 uretdione group of the component a) is consumed, preferably 0.6 to 0.9. The latter corresponds to a NCO/OH ratio of 0.6 to 2 to 1 or 1.2 to 1.8 to 1 respectively. These highly reactive polyurethane compositions used according to the invention are cured at temperatures of 100 to 160° C. and designated as modification II.
- d) 0.1 to 5 wt. % of at least one cocatalyst, selected from
- Suitable highly reactive uretdione group-containing polyurethane compositions according to the invention contain mixtures of temporarily deactivated, that is uretdione group-containing (internally blocked) di- or polyisocyanates, also described as curing agents a), and the catalysts c) and d) contained according to the invention and optionally in addition a polymer (binder) having functional groups—reactive towards NCO groups—also described as resin b). The catalysts ensure curing of the uretdione group-containing polyurethane compositions at low temperature. The uretdione group-containing polyurethane compositions are thus highly reactive.
- As component a) and b), those such as described above are used.
- As catalysts under c), quaternary ammonium salts, preferably tetraalkylammonium salts and/or quaternary phosphonium salts with halogens, hydroxides, alcoholates or organic or inorganic acid anions as counter-ion, are used. Examples of these are:
- Tetramethylammonium formate, tetramethylammonium acetate, tetramethylammonium propionate, tetramethylammonium butyrate, tetramethylammonium benzoate, tetraethylammonium formate, tetraethylammonium acetate, tetraethylammonium propionate, tetraethylammonium butyrate, tetraethylammonium benzoate, tetrapropylammonium formate, tetrapropylammonium acetate, tetrapropylammonium propionate, tetrapropylammonium butyrate, tetrapropylammonium benzoate, tetrabutylammonium formate, tetrabutylammonium acetate, tetrabutylammonium propionate, tetrabutylammonium butyrate and tetrabutylammonium benzoate and tetrabutylphosphonium acetate, tetrabutylphosphonium formate and ethyltriphenylphosphonium acetate, tetrabutylphosphonium benzotriazolate, tetraphenylphosphonium phenolate and trihexyltetradecylphosphonium decanoate, methyltributylammonium hydroxide, methyltriethylammonium hydroxide, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, tetrapentylammonium hydroxide, tetrahexylammonium hydroxide, tetraoctylammonium hydroxide, tetradecylammonium hydroxide, tetradecyltrihexylammonium hydroxide, tetraoctadecylammonium hydroxide, benzyltrimethylammonium hydroxide, benzyltriethylammonium hydroxide, tri-methylphenylammonium hydroxide, triethylmethylammonium hydroxide, tri-methylvinylammonium hydroxide, methyltributylammonium methanolate, methyltriethylammonium methanolate, tetramethylammonium methanolate, tetraethylammonium methanolate, tetrapropylammonium methanolate, tetrabutylammonium methanolate, tetrapentylammonium methanolate, tetrahexylammonium methanolate, tetraoctylammonium methanolate, tetradecylammonium methanolate, tetradecyltrihexylammonium methanolate, tetraoctadecylammonium methanolate, benzyltrimethylammonium methanolate, benzyltriethylammonium methanolate, trimethylphenylammonium methanolate, triethylmethylammonium methanolate, trimethylvinylammonium methanolate, methyltributylammonium ethanolate, methyltriethylammonium ethanolate, tetramethylammonium ethanolate, tetraethylammonium ethanolate, tetrapropylammonium ethanolate, tetrabutylammonium ethanolate, tetrapentylammonium ethanolate, tetrahexylammonium ethanolate, tetraoctylammonium methanolate, tetradecylammonium ethanolate, tetradecyltrihexylammonium ethanolate, tetraoctadecylammonium ethanolate, benzyltrimethylammonium ethanolate, benzyltriethylammonium ethanolate, trimethylphenylammonium ethanolate, triethylmethylammonium ethanolate, trimethylvinylammonium ethanolate, methyltributylammonium benzylate, methyltriethylammonium benzylate, tetramethylammonium benzylate, tetraethylammonium benzylate, tetrapropylammonium benzylate, tetrabutylammonium benzylate, tetrapentylammonium benzylate, tetrahexylammonium benzylate, tetraoctylammonium benzylate, tetradecylammonium benzylate, tetradecyltrihexylammonium benzylate, tetraoctadecylammonium benzylate, benzyltrimethylammonium benzylate, benzyltriethylammonium benzylate, trimethylphenylammonium benzylate, triethylmethylammonium benzylate, trimethylvinylammonium benzylate, tetramethylammonium fluoride, tetraethylammonium fluoride, tetrabutylammonium fluoride, tetraoctylammonium fluoride, benzyltrimethylammonium fluoride, tetrabutylphosphonium hydroxide, tetrabutylphosphonium fluoride, tetrabutylammonium chloride, tetrabutylammonium bromide, tetrabutylammonium iodide, tetraethylammonium chloride, tetraethylammonium bromide, tetraethylammonium iodide, tetramethylammonium chloride, tetramethylammonium bromide, tetramethylammonium iodide, benzyltrimethylammonium chloride, benzyltriethylammonium chloride, benzyltripropylammonium chloride, benzyltributylammonium chloride, methyltributylammonium chloride, methyltripropylammonium chloride, methyltriethylammonium chloride, methyltriphenylammonium chloride, phenyltrimethylammonium chloride, benzyltrimethylammonium bromide, benzyltriethylammonium bromide, benzyltripropylammonium bromide, benzyltributylammonium bromide, methyltributylammonium bromide, methyltripropylammonium bromide, methyltriethylammonium bromide, methyltriphenylammonium bromide, phenyltrimethylammonium bromide, benzyltrimethylammonium iodide, benzyltriethylammonium iodide, benzyltripropylammonium iodide, benzyltributylammonium iodide, methyltributylammonium iodide, methyltripropylammonium iodide, methyltriethylammonium iodide, methyltriphenylammonium iodide and phenyltrimethylammonium iodide, methyltributylammonium hydroxide, methyltriethylammonium hydroxide, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, tetrapentylammonium hydroxide, tetrahexylammonium hydroxide, tetraoctylammonium hydroxide, tetradecylammonium hydroxide, tetradecyltrihexylammonium hydroxide, tetraoctadecylammonium hydroxide, benzyltrimethylammonium hydroxide, benzyltriethylammonium hydroxide, trimethylphenylammonium hydroxide, triethylmethylammonium hydroxide, trimethylvinylammonium hydroxide, tetramethylammonium fluoride, tetraethylammonium fluoride, tetrabutylammonium fluoride, tetraoctylammonium fluoride and benzyltrimethylammonium fluoride. These catalysts can be added alone or in mixtures. Tetraethylammonium benzoate and/or tetrabutylammonium hydroxide are preferably used.
- The content of catalysts c) can be 0.1 to 5 wt. %, preferably from 0.3 to 2 wt. %, based on the total formulation of the matrix material.
- One modification according to the invention also includes the binding of such catalysts c) to the functional groups of the polymers b). Apart from this, these catalysts can be surrounded by an inert shell and be enapsulated thereby.
- As cocatalysts d1) epoxides are used. Possible here are for example glycidyl ethers and glycidyl esters, aliphatic epoxides, diglycidyl ethers based on bisphenol A and glycidyl methacrylates. Examples of such epoxides are triglycidyl isocyanurate (TGIC, trade name ARALDIT 810, Huntsman), mixtures of diglycidyl terephthalate and triglycidyl trimellitate (trade name ARALDIT PT 910 and 912, Huntsman), glycidyl esters of versatic acid (trade name KARDURA E10, Shell), 3,4-epoxycyclohexylmethyl 3′,4′-epoxycyclohexanecarboxylate (ECC), diglycidyl ethers based on bisphenol A (trade name EPIKOTE 828, Shell), ethylhexyl glycidyl ether, butyl glycidyl ether, pentaerythritol tetraglycidyl ether (trade
name POLYPDX R 16, UPPC AG) and other polypox types with free epoxy groups. Mixtures can also be used. Preferably ARALDIT PT 910 and 912 are used. - As cocatalysts d2), metal acetylacetonates are possible. Examples of these are zinc acetylacetonate, lithium acetylacetonate and tin acetylacetonate, alone or in mixtures. Zinc acetylacetonate is preferably used.
- As cocatalysts d2), quaternary ammonium acetylacetonates or quaternary phosphonium acetylacetonates are also possible.
- Examples of such catalysts are tetramethylammonium acetylacetonate, tetraethylammonium acetylacetonate, tetrapropylammonium acetylacetonate, tetrabutylammonium acetylacetonate, benzyltrimethylammonium acetylacetonate, benzyltriethylammonium acetylacetonate, tetramethylphosphonium acetylacetonate, tetraethylphosphonium acetylacetonate, tetrapropylphosphonium acetylacetonate, tetrabutylphosphonium acetylacetonate, benzyltrimethylphosphonium acetylacetonate and benzyltriethylphosphonium acetylacetonate. Particularly preferably, tetraethylammonium acetylacetonate and/or tetrabutylammonium acetylacetonate are used. Of course mixtures of such catalysts can also be used.
- The quantity of cocatalysts d1) and/or d2) can be from 0.1 to 5 wt. %, preferably from 0.3 to 2 wt. %, based on the total formulation of the matrix material.
- By means of the highly reactive and thus low temperature curing polyurethane compositions B) used according to the invention, at 100 to 160° C. curing temperature not only can energy and curing time be saved, but many temperature-sensitive supports can also be used.
- In the context of this invention, highly reactive (modification II) means that the uretdione group-containing polyurethane compositions used according to the invention cure at temperatures from 100 to 160° C., depending on the nature of the support. This curing temperature is preferably 120 to 150° C., particularly preferably from 130 to 140° C. The time for the curing of the polyurethane composition used according to the invention lies within from 5 to 60 minutes.
- The highly reactive uretdione group-containing polyurethane compositions B) used according to the invention provide very good flow and hence good impregnation behaviour and in the cured state excellent chemicals resistance. In addition, with the use of aliphatic crosslinking agents (e.g. IPDI or H12MDI) good weather resistance is also achieved.
- Suitable pigments are in principle all known pigments.
- The pigments from the known classes of the natural and synthetic inorganic pigments are employed. Useful natural pigments include earth colours, for example, green earth, yellow ochre or umber, and also mineral colours, for example iron oxides, malachite or cinnabar. Also suitable are inorganic synthetic pigments, for example carbon black, chromium pigments, cobalt pigments, iron pigments, ultramarine blue, or white pigments, for example titanium dioxide. Likewise suitable are natural organic pigments and synthetic organic pigments such as azo pigments (brilliant yellow, permanent red), polycyclic pigments (phthalocyanine blue, heliogen green) or diketopyrrolopyrrole pigments. Also suitable are metal effect pigments or pearlescent pigments.
- Examples of such pigments are: Prussian blue (pigment blue 27 C.I. 77510), brilliant yellow (pigment yellow 74 C.I. 11741), cadmium yellow (pigment yellow 35 C.I. 77205), cadmium red (pigment red 108 C.I. 77202), chromium oxide green (pigment green 17 C.I. 77288), cobalt blue (pigment blue 28 C.I. 77346), cobalt blue turquoise light (pigment blue 36 C.I. 77343), cobalt violet light (pigment violet 49 C.I. 77362), iron oxide black (pigment black 11 C.I. 77499), irgazine red (pigment red 254 C.I. 56110), manganese violet (
pigment violet 16 C.I. 77742), phthalocyanine blue (org.) (pigment blue 15 C.I. 74160), titanium white (pigment white C.I. 77891), ultramarine blue (pigment blue 29 C.I. 77007), ultramarine red A (pigment red 259 C.I. 77007), umber (pigment brown 7 C.I. 77491). - Suitable dyes are all known dyes, especially reactive dyes, disperse dyes, pigment dyes, acid dyes, developing dyes, cationic or basic dyes, coupling dyes, mordant dyes, vat dyes, metal complex dyes, substantive dyes.
- Important classes of dyes useable in the context of the invention are anthraquinone dyes, azo dyes, dioxazine dyes, indigo dyes, nitro dyes, nitroso dyes, phthalocyanine dyes, sulphur dyes, triphenylmethane dyes.
- Dyes and pigments especially suitable for powder coating applications are detailed, for example, in the documents from Clariant “Colorants for Powder Coatings” (2005) and from BASF “Colorants and additives from BASF for powder coatings” (2008).
- Overall, preference is given to pigment formulations since dyes have an at least limited light stability or weathering stability which limits direct outdoor use of the composite components produced from the correspondingly coloured prepregs according to the invention.
- The dyes are present in an amount of 15 up to % by weight in the matrix material B).
- Pigments are present in an amount of 0.5 up to 20% by weight in the matrix material B).
- The production of the matrix material can be effected as follows: the homogenization of all components for the production of the polyurethane composition B) can be effected in suitable units, such as for example heatable stirred vessels, kneaders, or even extruders, during which temperature upper limits of 120 to 130° C. should not be exceeded. The mixing of the individual components is preferably effected in an extruder at temperatures which are above the melting ranges of the individual components, but below the temperature at which the crosslinking reaction starts. Use directly from the melt or after cooling and production of a powder is possible thereafter. The production of the polyurethane composition B) can also be effected in a solvent by mixing in the aforesaid units.
- Next, depending on the process, the matrix material B) with the support A) is processed into the prepregs.
- The prepregs according to the invention and also the composite components have a fibre content by volume of greater than 50%, preferably of greater than 50-70%, particularly preferably of 50 to 65%.
- The reactive or highly reactive polyurethane compositions used according to the invention as matrix material essentially consist of a mixture of a reactive resin and a curing agent. After melt homogenization, this mixture has a Tg of at least 40° C. and as a rule reacts only above 160° C. in the case of the reactive polyurethane compositions, or above 100° C. in the case of the highly reactive polyurethane compositions, to give a crosslinked polyurethane and thus forms the matrix of the composite. This means that the prepregs according to the invention after their production are made up of the support and the applied reactive polyurethane composition as matrix material, which is present in noncrosslinked but reactive form.
- The prepregs are thus storage-stable, as a rule for several days and even weeks and can thus at any time be further processed into composites. This is the essential difference from the 2-component systems already described above, which are reactive and not storage-stable, since after application these immediately start to react and crosslink to give polyurethanes.
- The production of the prepregs according to the invention can be performed by means of the known plants and equipment by reaction injection moulding (RIM), reinforced reaction injection moulding (RRIM), pultrusion processes, by application of the solution in a cylinder mill or by means of a hot doctor knife, or other processes.
- Also subject matter of the invention is the use of the prepregs, in particular with fibrous supports of glass, carbon or aramid fibres.
- Also subject matter of the invention is the use of the prepregs produced according to the invention, for the production of composites in boat and shipbuilding, in aerospace technology, in automobile manufacture, and for two-wheel vehicles, preferably motorcycles and bicycles, and in the automotive, construction, medical engineering and sport fields, electrical and electronics industry, and power generating plants, e.g. for rotor blades in wind power plants.
- Also subject matter of the invention are the composite components produced from the prepregs produced according to the invention.
- A reactive polyurethane composition with the following formula was used for the production of the prepregs and the composites.
-
Formulation [Modification I] (according to the invention) Example I in wt. % VESTAGON BF 1321 32.02 (uretdione group-containing curing agent component a)), Evonik Degussa Reafree 17014 46.86 (OH-functional polyester resin component, from Cray Valley) Reafree 17091 15.62 (OH-functional polyester resin component from Cray Valley) Resiflow PV 88 1.00 (levelling agent; from Worlee) Benzoin, 0.50 (degassing aid, from Aldrich) Colortherm Yellow 104.00 (micronized pigment for plastics applications, from Lanxess) NCO:OH ratio 0.9:1 - The milled ingredients from the table are intimately mixed in a premixer and then homogenized in the extruder up to a maximum of 130° C. This reactive polyurethane composition can then after milling be used for the production of the prepregs by the powder impregnation process. For the direct melt impregnation process, the homogenized melt mixture produced in the extruder can be used directly. For the solvent-based process, no upstream melt homogenization is required.
- The DSC tests (glass transition temperature determinations and enthalpy of reaction measurements) are performed with a Mettler Toledo DSC 821e as per DIN 53765.
- The glass transition temperature of the extrudate was determined to 62° C.; the reaction enthalpy for the crosslinking reaction in the fresh state was 65.5 J/g.
- After the crosslinking of the matrix of the prepreg, the glass transition temperature rose to 80° C. and no heat flow for crosslinking was detectable any longer. For the results see
FIG. 1 . - The following glass fibre scrims and glass fibre fabrics were used in the examples and are referred to below as type I and type II.
- Type I is a linen E glass fabric 281 L Art. No. 3103 from “Schlösser & Cramer”. The fabric has an areal weight of 280 g/m2.
- Type II GBX 600 Art. No. 1023 is a sewn biaxial E glass scrim (−45/+45) from “Schlösser & Cramer”. This should be understood to mean two layers of fibre bundles which lie one over the other and are set at an angle of 90 degrees to one another. This structure is held together by other fibres, which do not however consist of glass. The surface of the glass fibres is treated with a standard size which is aminosilane-modified. The scrim has an areal weight of 600 g/m2.
- The production of the prepregs is effected by direct melt impregnation processes according to DE 102010029355.
- The storage stability of the prepregs was determined from the glass transition temperatures and the enthalpies of reaction of the crosslinking reaction by means of DSC studies.
- The crosslinking capacity of the PU prepregs is not impaired by storage at room temperature for a period of 5 weeks.
-
Time (days storage time) Tg [° C.] 2 62 14 64 28 62 35 63 -
Time (days enthalpy of storage time) curing [J/g] 2 65 14 67 28 67 35 66 - The composite components are produced on a composite press by a compression technique known to those skilled in the art. The homogeneous prepregs produced by direct impregnation were compressed into composite materials on a benchtop press. This benchtop press is the Polystat 200 T from the firm Schwabenthan, with which the prepregs are compressed to the corresponding composite sheets at temperatures between 120 and 200° C. The pressure is varied between normal pressure and 450 bar. Dynamic compression, i.e. alternating applications of pressure, can prove advantageous for the crosslinking of the fibres depending on the component size, thickness and polyurethane composition and hence the viscosity setting at the processing temperature.
- In one example, the temperature of the press is increased from 90° C. during the melting phase to 110° C., the pressure is increased to 440 bar after a melting phase of 3 minutes and then dynamically varied (7 times each of 1 minute duration) between 150 and 440 bar, during which the temperature is continuously increased to 140° C. Next the temperature is raised to 180° C. and at the same time the pressure is held at 350 bar until the removal of the composite component from the press after 30 minutes. The hard, rigid, chemicals resistant and impact resistant composite components (sheet products) with a fibre volume content of >50% are tested for the degree of curing (determination by DSC). The determination of the glass transition temperature of the cured matrix indicates the progress of the crosslinking at different curing temperatures. With the polyurethane composition used, the crosslinking is complete after ca. 25 minutes, and then an enthalpy of reaction for the crosslinking reaction is also no longer detectable.
Claims (17)
1. A prepreg, comprising:
A) a fibrous support
and
B) a matrix material of at least one reactive polyurethane composition,
wherein
the reactive polyurethane composition comprises a mixture of a binder, which comprises a polymer b) comprising functional groups reactive towards isocyanates and a curing agent a), which comprises a di- or polyisocyanate internally blocked, externally blocked with an external blocking agent, or both internally and externally blocked, and
the matrix material further comprises
a pigment having a particle diameter of <150 nm,
a dye, or
both the pigment and the dye.
2. The prepreg according to claim 1 ,
wherein the matrix material B) has a Tg of at least 40° C.
3. The prepreg according to claim 1 ,
wherein
prepreg has a fibre content by volume of greater than 50%.
4. The prepreg according to claim 1 ,
wherein
pigment comprises a natural inorganic pigment, a synthetic inorganic pigment, or a mixture of natural and synthetic inorganic pigments.
5. The prepreg according to claim 1 ,
wherein
the dye is selected from the group consisting of a reactive dye, a disperse dye, a pigment dye, an acid dye, a developing dye, a cationic or basic dye, a coupling dye, a mordant dye, a vat dye, a metal complex dye, and a substantive dye.
6. The prepreg according to claim 1 ,
wherein
the polymer b) comprises a hydroxyl group, an amino group, or a thiol group.
7. The prepreg according to claim 1 ,
wherein
the di- or polyisocyanate is selected from the group consisting of isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), diisocyanatodicyclohexylmethane (H12MDI), 2-methylpentane diisocyanate (MPDI), 2,2,4-trimethylhexamethylene diisocyanate/2,4,4-trimethyl-hexamethylene diisocyanate (TMDI), and norbornane diisocyanate (NBDI).
8. The prepreg according to claim 1 ,
wherein
the external blocking agent is selected from the group consisting of ethyl acetoacetate, diisopropylamine, methyl ethyl ketoxime, diethyl malonate, ε-caprolactam, 1,2,4-triazole, phenol, a substituted phenol, and 3,5-dimethylpyrazole.
9. The prepreg according to claim 1 ,
wherein
the curing agent a) comprises an IPDI adduct, an isocyanurate group, or a ε-caprolactam blocked isocyanate structure.
10. The prepreg according to claim 1 ,
wherein
the at least one reactive polyurethane composition further comprises a catalyst.
11. The prepreg according to claim 1 ,
wherein the at least one reactive polyurethane composition comprises
a uretdione group-comprising curing agent, based on polyaddition compounds from aliphatic, (cyclo)aliphatic or cycloaliphatic uretdione group-comprising polyisocyanates and hydroxyl group-comprising compounds, wherein the uretdione group-comprising curing agent is in solid form below 40° C. and in liquid form above 125° C., and has a free NCO content of less than 5 wt % and a uretdione content of 3-25 wt %,
a hydroxyl group-comprising polymer which is in solid form below 40° C. and in liquid form above 125° C. and has an OH number between 20 and 200 mg KOH/gram, and
optionally a catalyst, an auxiliary agent and an additive,
so that for each hydroxyl group of the hydroxyl group-comprising polymer 0.3 to 1 uretdione group of the uretdione group-comprising curing agent is consumed.
12. The prepreg according to claim 1 , wherein the at least one reactive polyurethane composition is powdery and comprises
a uretdione group-comprising curing agent;
optionally a polymer comprising functional groups reactive towards a NCO group;
0.1 to 5 wt % of at least one catalyst selected from the group consisting of a quaternary ammonium salt and a quaternary phosphonium salt, wherein the quaternary ammonium salt and the quaternary phosphonium salt comprise a halogen, a hydroxide, an alcoholate, or an organic or inorganic acid anion as a counter-ion;
0.1 to 5 wt % of at least one cocatalyst selected from the group consisting of
an epoxide,
a metal acetylacetonate, a quaternary ammonium acetylacetonate, and a quaternary phosphonium acetylacetonate; and
optionally an auxiliary agent and an additive.
13. The prepreg according to claim 1 , wherein the at least one reactive polyurethane composition is powdery and comprises
a uretdione group-comprising curing agent, based on polyaddition compounds from aliphatic, (cyclo)aliphatic or cycloaliphatic uretdione group-containing polyisocyanates and hydroxyl group-containing compounds, wherein the uretdione group-comprising curing agent is in solid form below 40° C. and in liquid form above 125° C. and has a free NCO content of less than 5 wt % and a uretdione content of 3-25 wt %;
a hydroxyl group-comprising polymer, which is in solid form below 40° C. and in liquid form above 125° C. and has an OH number between 20 and 200 mg KOH/gram;
0.1 to 5 wt % of at least one catalyst selected from the group consisting of a quaternary ammonium salt and a quaternary phosphonium salt, wherein the quaternary ammonium salt and the quaternary phosphonium salt comprise a halogen, a hydroxide, an alcoholate, or an organic or inorganic acid anion as a counter-ion;
0.1 to 5 wt % of at least one cocatalyst selected from the group consisting of
an epoxide,
a metal acetylacetonate, a quaternary ammonium acetylacetonate, and a quaternary phosphonium acetylacetonate; and
optionally an auxiliary agent and an additive,
so that for each hydroxyl group of the hydroxyl group-comprising polymer 0.3 to 1 uretdione group of the uretdione group-comprising curing agent is consumed.
14. The prepreg according to claim 1 , wherein the fibrous support comprises a fibrous support of glass, carbon or aramid fibres.
15. A process of producing a composite, the process comprising producing the composite with the prepreg according to claim 1 ,
wherein the composite is suitable for boat and ship building, aerospace technology, automobile manufacture, two-wheel vehicle manufacture, automotive technology, construction technology, medical technology, sport fields, electrical and electronics industry, and power generation plants.
16. A composite component produced from the prepreg according to claim 1 .
17. The prepreg according to claim 1 ,
wherein the polymer b) comprises
polyester, polyether, polyacrylate, polycarbonate or polyurethane with an OH number of 20 to 500 mg KOH/gram and an average molecular weight of 250 to 6000 g/mole.
Applications Claiming Priority (3)
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DE102010041239.2 | 2010-09-23 | ||
DE201010041239 DE102010041239A1 (en) | 2010-09-23 | 2010-09-23 | Prepregs based on storage-stable reactive or highly reactive polyurethane composition |
PCT/EP2011/064895 WO2012038200A1 (en) | 2010-09-23 | 2011-08-30 | Prepregs on the basis of a storage-stable reactive or highly reactive polyurethane composition |
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US20130231022A1 true US20130231022A1 (en) | 2013-09-05 |
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US13/824,084 Abandoned US20130231022A1 (en) | 2010-09-23 | 2011-08-30 | Prepregs based on a storage-stable reactive or highly reactive polyurethane composition |
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US (1) | US20130231022A1 (en) |
EP (1) | EP2619256A1 (en) |
JP (1) | JP2013537928A (en) |
KR (1) | KR20130109142A (en) |
CN (1) | CN103210023A (en) |
AU (1) | AU2011304536B2 (en) |
BR (1) | BR112013006846A2 (en) |
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DE (1) | DE102010041239A1 (en) |
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- 2011-08-30 KR KR20137010206A patent/KR20130109142A/en not_active Application Discontinuation
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US10633519B2 (en) | 2011-03-25 | 2020-04-28 | Evonik Operations Gmbh | Storage-stable polyurethane prepregs and mouldings produced therefrom composed of a polyurethane composition with liquid resin components |
US10071510B2 (en) | 2013-03-11 | 2018-09-11 | Evonik Degussa Gmbh | Composite semifinished products and mouldings produced therefrom and directly produced mouldings based on hydroxy-functionalized (meth)acrylates and uretdiones which are crosslinked by means of radiation to give thermosets |
US9550313B2 (en) | 2014-04-25 | 2017-01-24 | Evonik Degussa Gmbh | Process for the production of storage-stable epoxy prepregs, and composites produced therefrom, based on epoxides and acids amenable to free-radical polymerisation |
US9902095B2 (en) | 2014-05-06 | 2018-02-27 | Evonik Degussa Gmbh | Production of fibre composite component part based on steel and polyurethane |
US9902096B2 (en) | 2014-05-06 | 2018-02-27 | Evonik Degussa Gmbh | Production of fibre composite component part based on aluminium and polyurethane |
WO2016201375A1 (en) * | 2015-06-12 | 2016-12-15 | Carbitex, Inc. | Composite materials with binder-enhanced properties and method of production thereof |
US10093085B2 (en) | 2015-06-12 | 2018-10-09 | Carbitex, Inc. | Composite materials with binder-enhanced properties and method of production thereof |
US10428193B2 (en) | 2015-10-30 | 2019-10-01 | Evonik Degussa Gmbh | Polyurethane prepregs with controllable tack |
US11407200B2 (en) | 2015-12-02 | 2022-08-09 | Carbitex, Inc. | Joined fiber-reinforced composite material assembly with tunable anisotropic properties |
US10786973B2 (en) | 2015-12-02 | 2020-09-29 | Carbitex, Inc. | Joined fiber-reinforced composite material assembly with tunable anisotropic properties |
CN107675531A (en) * | 2016-04-19 | 2018-02-09 | 苏州大学 | A kind of terylene continuous melt dyeing staining solution |
CN105672002A (en) * | 2016-04-19 | 2016-06-15 | 苏州大学 | Method for achieving continuous pad-dry-cure dyeing of polyester |
US10626236B2 (en) | 2016-12-02 | 2020-04-21 | Evonik Operations Gmbh | Storage-stable one-component polyurethane prepregs and shaped bodies composed of polyurethane composition that have been produced therefrom |
US11109639B2 (en) | 2018-05-23 | 2021-09-07 | Carbitex, Inc. | Footwear insert formed from a composite assembly having anti-puncture and anisotropic properties |
Also Published As
Publication number | Publication date |
---|---|
CN103210023A (en) | 2013-07-17 |
TW201226453A (en) | 2012-07-01 |
KR20130109142A (en) | 2013-10-07 |
AU2011304536A1 (en) | 2013-04-04 |
MX2013003169A (en) | 2013-05-06 |
ZA201302838B (en) | 2013-12-23 |
EP2619256A1 (en) | 2013-07-31 |
JP2013537928A (en) | 2013-10-07 |
WO2012038200A1 (en) | 2012-03-29 |
AU2011304536B2 (en) | 2014-03-13 |
CA2811063A1 (en) | 2012-03-29 |
DE102010041239A1 (en) | 2012-03-29 |
RU2013118433A (en) | 2014-10-27 |
BR112013006846A2 (en) | 2016-06-07 |
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