CA2140195A1 - Use of a plastic mixture comprising a linear, high-molecular-weight polyester and an olefin copolymer - Google Patents
Use of a plastic mixture comprising a linear, high-molecular-weight polyester and an olefin copolymerInfo
- Publication number
- CA2140195A1 CA2140195A1 CA 2140195 CA2140195A CA2140195A1 CA 2140195 A1 CA2140195 A1 CA 2140195A1 CA 2140195 CA2140195 CA 2140195 CA 2140195 A CA2140195 A CA 2140195A CA 2140195 A1 CA2140195 A1 CA 2140195A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- unsaturated compound
- plastic mixture
- alkyl
- moulding
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Abstract
Mouldings based on linear, high-molecular-weight poly-esters are frequently used in the electrical industry. A
great disadvantage in the use of this material is leakage path formation on the surface of the mouldings. The present invention avoids the known disadvantages by use of a plastic mixture comprising A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 % by weight of an olefin copolymer.
great disadvantage in the use of this material is leakage path formation on the surface of the mouldings. The present invention avoids the known disadvantages by use of a plastic mixture comprising A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 % by weight of an olefin copolymer.
Description
21~
- 1 - O.Z. 4811 Huls Aktiengesellschaft Patentabteilung Use of a Plastic mixture comPrisinq a 1 ~ n~A r, hiqh-molecular-weiqht PolYester and an olefin copolymer The invention relates to the use of a plastic mixture comprising a linear, high-molecular-weight polyester and an olefin copolymer for the production of moulding compositions having a high comparative tracking index.
Linear, high-molecular-weight polyesters are known and proven construction materials which can be processed, for example, by injection-moulding or extrusion processes.
Mouldings made from them are used on a large scale by the electrical industry as connector strips, housings, switches, relay bases, etc.
A disadvantage of these mouldings, in particular in the case of filled and/or reinforced mouldings, is the formation of leakage paths. These are formed on soiling of the surface of the mouldings by electrolytes under the action of an electrical potential.
It is an object of the invention to reduce or avoid these known disadvantages.
This is achieved according to the invention by use of a plastic mixture comprising 25A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 ~ by weight of an olefin copolymer built up of 30a. from 50 to 84.5 ~ by weight of an unsaturated XlS~0~9S
- 1 - O.Z. 4811 Huls Aktiengesellschaft Patentabteilung Use of a Plastic mixture comPrisinq a 1 ~ n~A r, hiqh-molecular-weiqht PolYester and an olefin copolymer The invention relates to the use of a plastic mixture comprising a linear, high-molecular-weight polyester and an olefin copolymer for the production of moulding compositions having a high comparative tracking index.
Linear, high-molecular-weight polyesters are known and proven construction materials which can be processed, for example, by injection-moulding or extrusion processes.
Mouldings made from them are used on a large scale by the electrical industry as connector strips, housings, switches, relay bases, etc.
A disadvantage of these mouldings, in particular in the case of filled and/or reinforced mouldings, is the formation of leakage paths. These are formed on soiling of the surface of the mouldings by electrolytes under the action of an electrical potential.
It is an object of the invention to reduce or avoid these known disadvantages.
This is achieved according to the invention by use of a plastic mixture comprising 25A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 ~ by weight of an olefin copolymer built up of 30a. from 50 to 84.5 ~ by weight of an unsaturated XlS~0~9S
- 2 - O.Z. 4811 compound having from 2 to 6 carbon atoms in the carbon chain b. from 15 to 35 ~ by weight of an acrylate of the formula CH2--C C~
11 o--R
having Rl = H or Cl6-alkyl and R2 = Cl 8-alkyl ~. ~
c. from 0.5 to 15 % by weight of an unsaturated compound having an acid, anhydride and/or epoxide group as reactive group for producing moulding compositions having a high comparative t~atking index.
The polyesters are prepared by esterification or trans-esterification and subsequent polycondensation of aro-matic dicarboxylic acids or their ester-forming derivatives and also the corresponding diol tSorenson and Campbell, Preparative Methods of Polymer Chemistry, Inter-science Publishers Inc., (N.Y.), 1961, pages lll to 127; Kunst~toff-Handbuch, volume VIII, C. Hanser Verlag Munich, 1973; J. Polym. Sci., Part A 1, 4, pages 1851 to 1859, (1966)].
The reaction temperatures are generally in the range from 160 to 350 C, preferably in the range from 170 to 280 C. The reaction specified is carried out with exclusion of oxygen. For this reason, it is carried out in an inert gas atmosphere. Suitable inert gases are, for example, noble gases, nitrogen, carbon dioxide, etc. The reaction is carried out at atmospheric pressure or under reduced pressure. The polycondensation step is preferably carried out under reduced pressure.
z~ s 3 O.Z. 4811 The aromatic dicarboxylic acid is most commonly tere-phthalic acid. However, it i8 also possible to use other aromatic dicarboxylic acids such as, for example, phthal-ic acid, isophthalic acid, naphthalenedicarboxylic acid, etc., and also derivatives thereof.
Up to 20 mol %, preferably up to 15 mol %, of the aro-matic dicarboxylic acid in the polyesters can be replaced by other dicarboxylic acids known per se and having from 2 to 36 carbon atoms in the carbon skeleton. Examples of suitable dicarboxylic acids are isophthalic acid, phthal-ic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid7 sebacic acid, azelaic acid, decanedicarboxylic acid and dimeric fatty acid.
The diol component is formed by alkanediols having from 2 to 12 carbon atoms in the carbon chain. Preference is given to ethylene glycol and 1,4-butanediol.
Up to 20 mol %, preferably up to 15 mol %, of the diol component can be replaced by other (cyclo)aliphatic diols such as, for example, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,4- or 1,3-dimethylolcyclohexane or 1,12-dodecanediol.
The term polyester also includes block copolyesters. Such products are described, for example, in Chimia 28(9), pages 544 to 552 (1974) and in Rubber Chemistry and Technology 50, pages 688 to 703 (1977). These block copolyesters contain, besides the abovementioned aromatic dicarboxylic acid and diols, a poly(oxyalkylene)diol having a molecular weight in the range from about 600 to 2,500. Preferred poly(oxyalkylene)diol are poly(oxy-ethylene)diol, poly(oxypropylene)diol and poly(oxytetramethylene)diol. The proportion of the poly(oxyalkylene)diols is in the range from 4 to 40 % by weight, preferably from 10 to 35 % by weight (based on the specified block copolyester).
2~ 3s 4 O.Z. 4811 The polyesters have a solution viscosity (J value~ in the range from 80 to 240 cm3/g, preferably from 90 to 170 cm3/g.
Use is made mainly of poly(alkylene terephthalate~, preferably poly(ethylene terephthalate) and poly(butylene terephthalate).
The olefin copolymers used according to the invention are built up of a. from S0 to 84.5 % by weight, preferably from 60 to 75 % by weight, of an unsaturated compound having from 2 to 6, preferably 2 or 3, carbon atoms in the carbon chain, b. from 15 to 35 % by weight, preferably from 23 to 30 % by weight, of an acrylate of the formula C--C
having Rl = H or C16-alkyl and R2 = Cl-8-alkyl, c. from 0.5 to 15 % by weight, preferably from 2 to 10 % by weight, of an unsaturated compound having an acid, anhydride and/or epoxide group as reactive group.
Examples which may be mentioned are, for a.: ethylene, propylene; for b.: methyl, ethyl, propyl or butyl acry-late, ethylhexyl acrylate, methyl, propyl or butyl ethylacrylate; and for c.: maleic acid (anhydride), methyl, propyl, butyl or hexyl glycidyl(meth)acrylate.
Particularly preferred olefin copolymers which may be mentioned are ethylene/methyl acrylate/maleic acid 21~ 5 O.Z. 4811 (anhydride) or ethylene/methyl acrylate/methyl glycidyl-methacrylate or ethylene/methyl ethylacrylate/maleic acid (anhydride) terpolymers.
The olefin copolymers of the invention and their prepar-ation are known.
The melt flow index of the olefin copolymers i8 in the range from 2 to 12, preferably from 4 to 8, g/10 min.
The preparation of the plastic mixture is carried out by conventional and known processes, e.g. by melt mixihg of the two components in a mixer providing good compounding, such as, for example, a twin-screw compounder, at tem-peratures which depend on the melting points of the components, in general at temperatures between 220 and 300 C.
The plastic mixture contains from 60 to 95 % by weight, preferably from 79 to 95 % by weight, of linear, high-molecular-weight polyester and from 5 to 40 % by weight, preferably from 5 to 21 % by weight, of olefin copolymers.
The plastic mixture can be processed using conventional machines by injection moulding or extrusion to give moulding compositions.
The moulding compositions can contain auxiliaries and additives. ~xamples of these are nucleating agents, delustring agents, fluidizers or other processing aids and also pigments, fillers and reinforcing materials.
Nucleating agents, delustring agents, fluidizers or other processing aids are present in the moulding composition in amounts of up to 6 % by weight, preferably from 0.2 to 3.5 % by weight. Pigments, fillers and reinforcing materials are present in the moulding composition in amounts of up to 60 % by weight, preferably from 1 to - - 6 - O.Z. 4811 50 % by weight.
The plastic mixtures of the invention can be used to produce mouldings, in particular for electrical appli-cations, which have a particularly high comparative tracking index.
The parameters referred to in the description and in the examples were determined by means of the following measurement methods.
The determination of the solution vi~cosity (J value) of the polye~ter is carried out on a 0.5 % by weight strength phenol/o-dichlorobenzene solution (weight ratio 1 : 1) at 25 C in accordance with DIN 53 728/ISO 1628/5, Part 5.
The determination of the melt flow inde~ (MFI value) is carried out on a melt of the olefin copolymers at 190 C
and under a load of 2.16 kg (ISO 1133).
The determination of the comparative tracking index (CTI value) is carried out on a test specimen (dimen-sions: 15 x 15 mm, 3 mm thick). The surface of the specimen must be clean (free of fingerprints, fat, oil, etc.). Above the surface are two electrodes, arranged vertically at a distance of 4 ~ 0.1 mm from one another, which form an angle of 60 symmetrically to the vertical.
Both electrodes rest on the surface of the test specimen (contact force: 1 + 0.05 N).
The test solution used is a 0.1 + 0.002 % by weight solution of ammonium chloride in distilled or deionized water.
The test solution is applied dropwise between the elec-trodes at a time interval of 30 + 5 sec.
The comparative tracking index (CTI value) is taken 7 - Z . 4811 as that numerical value of the applied potential at which the potential does not ~ust yet break down after appli-cation of 50 drops of test solution. However, this value is only valid if there is no breakdown of the potential 5 at 5 further points on the te~t specimen surface after 100 applied drops and a potential decreased by 25 volt.
The measurement described is carried out in accordance with DIN/IEC 112 (VDE 0303/Part 1 ) .
The experiments denoted by letters are not according to 10 the invention.
E~ample~;
Example 1 Glass-fibre-reinforced moulding compositions Composition: 80 parts by wt. p o 1 y b u t y 1 e n e terephthalate (J value: 107 cm3/g) 20 parts by wt. ethylene/methyl acrylate/glycidyl methacrylate ter-polymer (MFI value:
11 o--R
having Rl = H or Cl6-alkyl and R2 = Cl 8-alkyl ~. ~
c. from 0.5 to 15 % by weight of an unsaturated compound having an acid, anhydride and/or epoxide group as reactive group for producing moulding compositions having a high comparative t~atking index.
The polyesters are prepared by esterification or trans-esterification and subsequent polycondensation of aro-matic dicarboxylic acids or their ester-forming derivatives and also the corresponding diol tSorenson and Campbell, Preparative Methods of Polymer Chemistry, Inter-science Publishers Inc., (N.Y.), 1961, pages lll to 127; Kunst~toff-Handbuch, volume VIII, C. Hanser Verlag Munich, 1973; J. Polym. Sci., Part A 1, 4, pages 1851 to 1859, (1966)].
The reaction temperatures are generally in the range from 160 to 350 C, preferably in the range from 170 to 280 C. The reaction specified is carried out with exclusion of oxygen. For this reason, it is carried out in an inert gas atmosphere. Suitable inert gases are, for example, noble gases, nitrogen, carbon dioxide, etc. The reaction is carried out at atmospheric pressure or under reduced pressure. The polycondensation step is preferably carried out under reduced pressure.
z~ s 3 O.Z. 4811 The aromatic dicarboxylic acid is most commonly tere-phthalic acid. However, it i8 also possible to use other aromatic dicarboxylic acids such as, for example, phthal-ic acid, isophthalic acid, naphthalenedicarboxylic acid, etc., and also derivatives thereof.
Up to 20 mol %, preferably up to 15 mol %, of the aro-matic dicarboxylic acid in the polyesters can be replaced by other dicarboxylic acids known per se and having from 2 to 36 carbon atoms in the carbon skeleton. Examples of suitable dicarboxylic acids are isophthalic acid, phthal-ic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid7 sebacic acid, azelaic acid, decanedicarboxylic acid and dimeric fatty acid.
The diol component is formed by alkanediols having from 2 to 12 carbon atoms in the carbon chain. Preference is given to ethylene glycol and 1,4-butanediol.
Up to 20 mol %, preferably up to 15 mol %, of the diol component can be replaced by other (cyclo)aliphatic diols such as, for example, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,4- or 1,3-dimethylolcyclohexane or 1,12-dodecanediol.
The term polyester also includes block copolyesters. Such products are described, for example, in Chimia 28(9), pages 544 to 552 (1974) and in Rubber Chemistry and Technology 50, pages 688 to 703 (1977). These block copolyesters contain, besides the abovementioned aromatic dicarboxylic acid and diols, a poly(oxyalkylene)diol having a molecular weight in the range from about 600 to 2,500. Preferred poly(oxyalkylene)diol are poly(oxy-ethylene)diol, poly(oxypropylene)diol and poly(oxytetramethylene)diol. The proportion of the poly(oxyalkylene)diols is in the range from 4 to 40 % by weight, preferably from 10 to 35 % by weight (based on the specified block copolyester).
2~ 3s 4 O.Z. 4811 The polyesters have a solution viscosity (J value~ in the range from 80 to 240 cm3/g, preferably from 90 to 170 cm3/g.
Use is made mainly of poly(alkylene terephthalate~, preferably poly(ethylene terephthalate) and poly(butylene terephthalate).
The olefin copolymers used according to the invention are built up of a. from S0 to 84.5 % by weight, preferably from 60 to 75 % by weight, of an unsaturated compound having from 2 to 6, preferably 2 or 3, carbon atoms in the carbon chain, b. from 15 to 35 % by weight, preferably from 23 to 30 % by weight, of an acrylate of the formula C--C
having Rl = H or C16-alkyl and R2 = Cl-8-alkyl, c. from 0.5 to 15 % by weight, preferably from 2 to 10 % by weight, of an unsaturated compound having an acid, anhydride and/or epoxide group as reactive group.
Examples which may be mentioned are, for a.: ethylene, propylene; for b.: methyl, ethyl, propyl or butyl acry-late, ethylhexyl acrylate, methyl, propyl or butyl ethylacrylate; and for c.: maleic acid (anhydride), methyl, propyl, butyl or hexyl glycidyl(meth)acrylate.
Particularly preferred olefin copolymers which may be mentioned are ethylene/methyl acrylate/maleic acid 21~ 5 O.Z. 4811 (anhydride) or ethylene/methyl acrylate/methyl glycidyl-methacrylate or ethylene/methyl ethylacrylate/maleic acid (anhydride) terpolymers.
The olefin copolymers of the invention and their prepar-ation are known.
The melt flow index of the olefin copolymers i8 in the range from 2 to 12, preferably from 4 to 8, g/10 min.
The preparation of the plastic mixture is carried out by conventional and known processes, e.g. by melt mixihg of the two components in a mixer providing good compounding, such as, for example, a twin-screw compounder, at tem-peratures which depend on the melting points of the components, in general at temperatures between 220 and 300 C.
The plastic mixture contains from 60 to 95 % by weight, preferably from 79 to 95 % by weight, of linear, high-molecular-weight polyester and from 5 to 40 % by weight, preferably from 5 to 21 % by weight, of olefin copolymers.
The plastic mixture can be processed using conventional machines by injection moulding or extrusion to give moulding compositions.
The moulding compositions can contain auxiliaries and additives. ~xamples of these are nucleating agents, delustring agents, fluidizers or other processing aids and also pigments, fillers and reinforcing materials.
Nucleating agents, delustring agents, fluidizers or other processing aids are present in the moulding composition in amounts of up to 6 % by weight, preferably from 0.2 to 3.5 % by weight. Pigments, fillers and reinforcing materials are present in the moulding composition in amounts of up to 60 % by weight, preferably from 1 to - - 6 - O.Z. 4811 50 % by weight.
The plastic mixtures of the invention can be used to produce mouldings, in particular for electrical appli-cations, which have a particularly high comparative tracking index.
The parameters referred to in the description and in the examples were determined by means of the following measurement methods.
The determination of the solution vi~cosity (J value) of the polye~ter is carried out on a 0.5 % by weight strength phenol/o-dichlorobenzene solution (weight ratio 1 : 1) at 25 C in accordance with DIN 53 728/ISO 1628/5, Part 5.
The determination of the melt flow inde~ (MFI value) is carried out on a melt of the olefin copolymers at 190 C
and under a load of 2.16 kg (ISO 1133).
The determination of the comparative tracking index (CTI value) is carried out on a test specimen (dimen-sions: 15 x 15 mm, 3 mm thick). The surface of the specimen must be clean (free of fingerprints, fat, oil, etc.). Above the surface are two electrodes, arranged vertically at a distance of 4 ~ 0.1 mm from one another, which form an angle of 60 symmetrically to the vertical.
Both electrodes rest on the surface of the test specimen (contact force: 1 + 0.05 N).
The test solution used is a 0.1 + 0.002 % by weight solution of ammonium chloride in distilled or deionized water.
The test solution is applied dropwise between the elec-trodes at a time interval of 30 + 5 sec.
The comparative tracking index (CTI value) is taken 7 - Z . 4811 as that numerical value of the applied potential at which the potential does not ~ust yet break down after appli-cation of 50 drops of test solution. However, this value is only valid if there is no breakdown of the potential 5 at 5 further points on the te~t specimen surface after 100 applied drops and a potential decreased by 25 volt.
The measurement described is carried out in accordance with DIN/IEC 112 (VDE 0303/Part 1 ) .
The experiments denoted by letters are not according to 10 the invention.
E~ample~;
Example 1 Glass-fibre-reinforced moulding compositions Composition: 80 parts by wt. p o 1 y b u t y 1 e n e terephthalate (J value: 107 cm3/g) 20 parts by wt. ethylene/methyl acrylate/glycidyl methacrylate ter-polymer (MFI value:
6 g/10 min. ) (LOTADER~ID
AX 8660 ) 25.5 parts by wt. glass fibres (type OCF 429 YZ) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTE~) 1004) 0.5 part by wt. phenolic antioxidant (IRG~NOX~D 1010) 0.5 part by wt. oxidized polyethylene wax (VESTOWAX
AO 1539) 214~35 - 8 - O.Z. 4811 CTI value: 600 Example A
Composition: 100 parts by wt. p o l y b u t y l e n e terephthalate (J value: 107 cm3/g) 25.5 parts by wt. glass fibres (type OCF 429 yz) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTEID 1004) 0.5 part by wt. phenolic antioxidant (IRGANOX~l9 1010) 0.5 part by wt. oxidized polyethylene wa x ( VE S TOWAX~9 AO 1539) CTI value: 375 Example 2 Filler-containing moulding compositions Composition: 80 parts by wt. p o l y b u t y l e n e terephthalate (J value: 107 cm3/g) 20 parts by wt. ethylene/methyl acrylate/glycidyl m e t h a c ry l a t e terpolymer (MFI value:
6 g/10 min.) (LOTADER~D
AX 8660) 43 parts by wt. aminosilanated alu-minium silicate (kaolin) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTE~ 1004) 21~ 5 ~ 9 ~ O.Z. 4811 _ 0.5 part by wt. phenolic antioxidant ( IRGANOXI~9 1010 ) 0.5 part by wt. oxidized polyethylenewa x ( V E S T OWAX~9 A0 1539) CTI value: 600 l~xample B
Composition: 100 parts by wt. p o 1 y b u t y l e n e terephthalate (J value: 107 cm3/g ) 43 parts by wt. ~minosilanated alu-minium silicate (kaolin) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin ( EPIROTE~ 1004 ) 0.5 part by wt. phenolic antioxidant( IRGANOX0 1010 ) 0.5 part by wt. oxidized polyethylene wax (VESTOWAX~
AO 1539) CTI value: 300 (250~
AX 8660 ) 25.5 parts by wt. glass fibres (type OCF 429 YZ) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTE~) 1004) 0.5 part by wt. phenolic antioxidant (IRG~NOX~D 1010) 0.5 part by wt. oxidized polyethylene wax (VESTOWAX
AO 1539) 214~35 - 8 - O.Z. 4811 CTI value: 600 Example A
Composition: 100 parts by wt. p o l y b u t y l e n e terephthalate (J value: 107 cm3/g) 25.5 parts by wt. glass fibres (type OCF 429 yz) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTEID 1004) 0.5 part by wt. phenolic antioxidant (IRGANOX~l9 1010) 0.5 part by wt. oxidized polyethylene wa x ( VE S TOWAX~9 AO 1539) CTI value: 375 Example 2 Filler-containing moulding compositions Composition: 80 parts by wt. p o l y b u t y l e n e terephthalate (J value: 107 cm3/g) 20 parts by wt. ethylene/methyl acrylate/glycidyl m e t h a c ry l a t e terpolymer (MFI value:
6 g/10 min.) (LOTADER~D
AX 8660) 43 parts by wt. aminosilanated alu-minium silicate (kaolin) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin (EPIKOTE~ 1004) 21~ 5 ~ 9 ~ O.Z. 4811 _ 0.5 part by wt. phenolic antioxidant ( IRGANOXI~9 1010 ) 0.5 part by wt. oxidized polyethylenewa x ( V E S T OWAX~9 A0 1539) CTI value: 600 l~xample B
Composition: 100 parts by wt. p o 1 y b u t y l e n e terephthalate (J value: 107 cm3/g ) 43 parts by wt. ~minosilanated alu-minium silicate (kaolin) 0.5 part by wt. bisphenol A/epichloro-hydrin epoxy resin ( EPIROTE~ 1004 ) 0.5 part by wt. phenolic antioxidant( IRGANOX0 1010 ) 0.5 part by wt. oxidized polyethylene wax (VESTOWAX~
AO 1539) CTI value: 300 (250~
Claims (24)
1. Use of a plastic mixture comprising A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 % by weight of an olefin copolymer built up of a. from 50 to 84.5 % by weight of an unsaturated compound having from 2 to 6 carbon atoms in the carbon chain b. from 15 to 35 % by weight of an acrylate of the formula having R1 = H or C1-6-alkyl and R2 = C1-8-alkyl c. from 0.5 to 15 % by weight of an unsaturated compound having an acid, anhydride or epoxide group as reactive group for producing moulding compositions having a high comparative tracking index.
2. Use of a plastic mixture according to Claim 1 comprising A. from 79 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 21 % by weight of an olefin copolymer.
3. Use of a plastic mixture according to Claim 1, wherein the olefin copolymer is built up of a. from 60 to 75 % by weight of unsaturated compound b. from 23 to 30 % by weight of (alkyl)acrylate c. from 2 to 10 % by weight of unsaturated compound having reactive groups.
4. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the unsaturated compound is ethylene.
5. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the unsaturated compound is propylene.
6. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the (alkyl)acrylate is an acrylic ester.
7. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the (alkyl)acrylate is an ethylacrylic ester.
8. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the unsaturated compound having a reactive group is maleic acid (anhydride).
9. Use of a plastic mixture according to any one of Claims 1 to 3, wherein the unsaturated compound having a reactive group is methyl glycidylmethacrylate.
10. Use of the plastic mixture according to any one of Claims 1 to 3 for an electrical moulding.
11. A process for preparing a plastic mixture having a high comparative tracking index comprising A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 % by weight of an olefin copolymer built up of a. from 50 to 84.5 % by weight of an unsaturated compound having from 2 to 6 carbon atoms in the carbon chain b. from 15 to 35 % by weight of an acrylate of the formula having R1 = H or C1-6-alkyl and R2 = C1-8-alkyl c. from 0.5 to 15 % by weight of an unsaturated compound having an acid, anhydride or epoxide group as reactive group which process comprises melt mixing said polyester and said olefin copolymer.
12. A process according to Claim 11 wherein said melt mixing is carried out in a twin-screw compounder.
13. A process according to Claim 11 wherein said melt mixing is carried out at a temperature of from 220°C to 300°C.
14. A process according to any one of Claims 11 to 13 wherein said plastic mixture is subsequently injection moulded to give a moulding composition having a high comparative tracking index.
15. A process according to any one of Claims 11 to 13 wherein said plastic mixture is subsequently extruded to give a moulding composition having a high comparative tracking index.
16. An electrical moulding having a high comparative tracking index comprising A. from 60 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 40 % by weight of an olefin copolymer built up of a. from 50 to 84.5 % by weight of an unsaturated compound having from 2 to 6 carbon atoms in the carbon chain b. from 15 to 35 % by weight of an acrylate of the formula having R1 = H or C1-6-alkyl and R2 = C1-8-alkyl c. from 0.5 to 15 % by weight of an unsaturated compound having an acid, anhydride or epoxide group as reactive group.
17. An electrical moulding according to Claim 16 comprising A. from 79 to 95 % by weight of a linear, high-molecular-weight polyester and B. from 5 to 21 % by weight of an olefin copolymer.
18. An electrical moulding according to Claim 16, wherein the olefin copolymer is built up of a. from 60 to 75 % by weight of unsaturated compound b. from 23 to 30 % by weight of (alkyl)acrylate c. from 2 to 10 % by weight of unsaturated compound having reactive groups.
19. An electrical moulding according to any one of Claims 16 to 18 wherein the unsaturated compound is ethylene.
20. An electrical moulding according to any one of Claims 16 to 18 wherein the unsaturated compound is propylene.
21. An electrical moulding according to any one of Claims 16 to 18 wherein the (alkyl)acrylate is an acrylic ester.
22. An electrical moulding according to any one of Claims 16 to 18 wherein the (alkyl)acrylate is an ethylacrylic ester.
23. An electrical moulding according to any one of Claims 16 to 18 wherein the unsaturated compound having a reactive group is maleic acid (anhydride).
24. An electrical moulding according to any one of Claims 16 to 18 wherein the unsaturated compound having a reactive group is methylglycidylmethacrylate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19944401165 DE4401165A1 (en) | 1994-01-17 | 1994-01-17 | Use of a plastic mixture of a linear, high molecular weight polyester and an olefin copolymer |
| DEP4401165.2 | 1994-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2140195A1 true CA2140195A1 (en) | 1995-07-18 |
Family
ID=6508069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2140195 Abandoned CA2140195A1 (en) | 1994-01-17 | 1995-01-13 | Use of a plastic mixture comprising a linear, high-molecular-weight polyester and an olefin copolymer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0663424A3 (en) |
| JP (1) | JPH07216204A (en) |
| CA (1) | CA2140195A1 (en) |
| DE (1) | DE4401165A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6660796B2 (en) | 2000-12-21 | 2003-12-09 | Degussa Ag | Polyester molding composition |
| US7612130B2 (en) * | 2006-10-16 | 2009-11-03 | Sabic Innovative Plastics Ip B.V. | Composition of polyester, aromatic epoxy compound and epoxy-functional polyolefin and/or copolyester |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3568672B2 (en) * | 1996-01-23 | 2004-09-22 | 株式会社ユポ・コーポレーション | Stretched thermoplastic polyester resin film |
| DE19742884A1 (en) * | 1997-09-29 | 1999-04-01 | Ticona Polymerwerke Gmbh | Thermoplastic molding compound |
| JP4770250B2 (en) * | 2005-04-19 | 2011-09-14 | 株式会社カネカ | Polyester resin composition and molded product obtained therefrom |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985003718A1 (en) * | 1984-02-24 | 1985-08-29 | E. I. Du Pont De Nemours And Company | Toughened thermoplastic polyester compositions |
| JPH03122158A (en) * | 1989-10-06 | 1991-05-24 | Nippon Petrochem Co Ltd | Polyester resin compositon |
| JPH0488051A (en) * | 1990-07-31 | 1992-03-19 | Nippon G Ii Plast Kk | Electric component molding |
| EP0536966B1 (en) * | 1991-10-09 | 1997-05-07 | Sumitomo Chemical Company Limited | Process for producing reinforced crystalline engineering plastic composition |
| JP3164175B2 (en) * | 1992-05-20 | 2001-05-08 | 東洋紡績株式会社 | Polyester resin composition |
-
1994
- 1994-01-17 DE DE19944401165 patent/DE4401165A1/en not_active Withdrawn
- 1994-11-15 EP EP94117966A patent/EP0663424A3/en not_active Withdrawn
-
1995
- 1995-01-13 CA CA 2140195 patent/CA2140195A1/en not_active Abandoned
- 1995-01-17 JP JP513095A patent/JPH07216204A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6660796B2 (en) | 2000-12-21 | 2003-12-09 | Degussa Ag | Polyester molding composition |
| US7612130B2 (en) * | 2006-10-16 | 2009-11-03 | Sabic Innovative Plastics Ip B.V. | Composition of polyester, aromatic epoxy compound and epoxy-functional polyolefin and/or copolyester |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07216204A (en) | 1995-08-15 |
| EP0663424A2 (en) | 1995-07-19 |
| EP0663424A3 (en) | 1995-10-18 |
| DE4401165A1 (en) | 1995-07-20 |
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