CA1121530A - Method and composition for coating glass fibers and the fibers obtained - Google Patents
Method and composition for coating glass fibers and the fibers obtainedInfo
- Publication number
- CA1121530A CA1121530A CA000295264A CA295264A CA1121530A CA 1121530 A CA1121530 A CA 1121530A CA 000295264 A CA000295264 A CA 000295264A CA 295264 A CA295264 A CA 295264A CA 1121530 A CA1121530 A CA 1121530A
- Authority
- CA
- Canada
- Prior art keywords
- weight
- organo
- silane
- sizing
- strands
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/40—Organo-silicon compounds
-
- 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
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
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- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2962—Silane, silicone or siloxane in coating
Abstract
ABSTRACT
The present invention concerns aqueous compositions for coating glass fibers to be used particularly for reinforcing thermoset or thermoplastic synthetic resins.
It also concerns both a method for fabricating glass fibers with great tensile strength, in which method these aqueous compositions are applied to the fibers, and the obtained fibers.
The present invention concerns aqueous compositions for coating glass fibers to be used particularly for reinforcing thermoset or thermoplastic synthetic resins.
It also concerns both a method for fabricating glass fibers with great tensile strength, in which method these aqueous compositions are applied to the fibers, and the obtained fibers.
Description
The present invention concerns aqueous compositions for coating glass fibers to be used particularly for reinforcing thermoset or thermop]astic synthetic resins.
It also concerns both a method for fabricating glass fibers with great tensile strength, in which method these a~ueous compositions are applied to the fibers, and the obtained fibers~
The glass fibers are fabricated in a known manner through the attenuation of molten glass threads flowing from ~ie orifices. These glass threads are thinned aown in order to form continuous filaments by means of an attenuation carried out by the winding of the filaments, after being gathered in the form of a strand, on a support borne by a winder turning at great speed. Before being gathered in the form of a strand, the filaments are coated with a sizing by being passed over a continuously fed sizing component.
The sizing is applied for the purpose of preventing the mutual abrasion and the rupturing of the individual filaments when the strana is submitted to a certain number of transformations auring its fabrication or utilization.
Particularly, if the strand must undergo certain textile operations, such as twisting, cabling, warping, pirn winding or weaving, before being incorporated with the organic resins to be reinforced, it is necessary for it to be coated with a coating with good protective and lubricating properties so that the strand can support ~riction during its speedy passage through guide elements. The sizing must also establish an adhesion or sufficient cohesion of the filamen-ts to each other so as to give the strand integrity. The protective anti-abrasion property and unity are essential when the strand undergoes all the aforementioned textile transformation operations.
~L~;Z1530 In another connection, where the strands or webs are used for thc reinforcement of plastic materials, the sizing must be compatible with the matrices to be reinforced and must improve the aahesion of the strands to these matrices so that laminations with good mechanical and dielectrical properties are obtained.
Generally the sizing is a solution or an aqueous dispersion composed essentially of one or several adhesive or film forming agents, contributing to the integrity of the strands; of lubricants, for protecting the filaments and strands against abrasion; and possibly of binding agents favoring adhesion of the filaments to the organic matrices to be reinforced.
~arious additives, such as products stahilizing the emulsions, antistatic products, fungicides or softening agents, can also be added to these sizing compositions, depending on the ultimate range of applications of the strands.
The sized strands can be used in the form of cut strands and are in this case directly submitted lo a cutting operating after fiberization or after the formation of the assemblies ~union of parallel strands without twisting);
these cut strands are then incorporated with the thermoplastic or thermoset s~nthetic resins. The strands can also be used in the form of twisted or untwisted, continuous strands and ~5 can be used for textiles as well as for the reinforcement of the said resins.
The present invention relates particularly to sizings permitting fabrication of strands capable of supporting the strains to which they are submitted during their transforma-tions or ulterior utilizations such as twisting, cabling, sectionalwarping, weaving, wrapping, bra}ding~ filament winding or ~utting. The sizings according to the invention are ~i 2 3~
conducive to s-trands displaying not only strong unity and good adhesion to the matrices to be reinforced, but they also allow for a considerable decrease in the number of filament ruptures and for an improvement in the yields during these transformation opera~ions.
The invention relates to compositions containing, in addition to the usual basic ingredients for coating glass fibers, at least one component from an organosilane family, the formula for whic~ is given hereafter, one particular characteristic of which is that it considerably increases the tensile stren~th of the strands without affecting their other properties, particularly their behavior during textile operations.
In order to coat glass fibers to be used in the form of continuous strands, for reinforcing plastic materials, it is well known to use a~ueous sizings containing:
- adhesive agents such as polyvinyl acetate, acrylic resins, polyesters, epoxy resins, polyurethanes, - lubricating agents;
- and at least one component of the organo-silane type.
This organo-silane component serves as a binding or brid~in~ agent of the glass to the or~anic resins and thus assures comptability of the glass fibers with the resins to be reinforced. However, the organosilanes used most often in these sizings, such as ~ -aminopropyltriethoxysilane, vinyltriacetoxysilane, ~ ~ -~mino-ethyl ~ -amino-propyltri-methoxysilane,--methacrvloxyprop~l~imethoxysilane, ~henyl-f ~ -metf?o,~yethox yst ~a~eJ
C trimethoxysilane vinyl-tri- ~ ~ ,practically do not improve the tensile strength of the sized strands and only provide them the property of ~ood adhesion to the matrices to be reinforced. The same holds true for other prior art organo-silanes which are more rarely used, such as 1~
LS3~
polyaminopropyl-trimethoxysilane or ~ - (3,4-epoxy cyclohexyl) ethyl-tri-methoxysilane, or paraaminophenyltrihydroxysilane.
In another case, when strands coated with these known sizings are first woven so as to then be used in the form of webs for the reinforcement of plastic materials, the various components of the incorporated organo-silane type do not allow for obtain-ing strands possessing integrity, sliding ability and tensile strength strong enough for the twisting, winding on a warp beam and weaving operat;ons to be carried out without filament lo rupture or other difficulties. These conditions thus considerahly decrease the yielas from the operations and also the quality of the webs.
For this application, the publication of French patent 2,259,127 also proposed aqueous sizings containing a partially baked starch, a paraEin wax, an emulsifier, a cationic lubricant and organo-silane of the formula:
H2C = C - C - O - NH~ - CH~ - CH2 - NH - (CH2)3 - Si ~OCH3)3 However, the preceding composition seems to be the only one giving strands leading to satisfactory results during textile operations. In fact, it is specifically stated that replacing this organo-silane with another silane such~ ~-methacryl-oxypropyltrimethoxy-silane totally destroys the ability of the strands to withstand these te~tile operations. In addition, the addition of this organo-silane type of component to the sizings does not seem to improve the tensile strength of the strand in contrast to the use of particularly active organo-silanes as proposed by the invention.
According to the present invention, the addition to the sizing for glass fibers of one or several specific silanes comprising the group defined hereafter surprisingly improves the tensile strenyth of the sized strands, this improvement being generally in an amount of 20 to 60~ depending on the types o strands and the sizing components; this takes place without any effect on the other properties of these strands.
The aqueous compositions forming objects of the invention essentially contain the following elements, the rates for which are expressed throughout the description in weight parts of active materials per 100 parts of the total:
- 0.5 to 15% oE adhesive agent(s), lo - o . 1 to 2~ of at least one organo-silane from the group comprised of the organo-silanes containing an organic chain of the polyazamide type and of the organo-silanes, the organic chain of which contains at least one phenyl radical and at least two secondary or tertiarv amine groups, - 0 to 7% of lubricant(s), - 0 to 2% of another silane or a glass resin binding agent of some sort.
- complementt demineralized water.
The proposed organo-silanes with a polyazamide type of organic chain have the following formula:
H CNH (CH2)n NH Rl C]x CNH (CH2)n I R3 CO~ y NH (CH~)n NH2 Si(~)3 in which:
0.5 ~ y 6 15; 2~ n ~6 and preferably n = 2 or 3.
R is a methoxy, ethoxy, propoxy, n-butoxy or ~ ~methoxyethoxy radical.
ol ~ va l~n,~
C Rl and R3 are~alkylene di-ad radicals containing 1 to 3 carbon atoms.
/er7?' R2 represents a substituted or non-substituted~cycloaliphatic, aromatic or ali~hatic ~ radical.
B~
The various methods for fabrication of these components, the nature of the radicals and the values of x and y as a function of the method used are described in detail in U.S. patent 3,746,738.
Organo-silanes whose organic chain encompasses at least one phenyl radical and at least two secondary or tertiary amine groups reacting substantia]ly on the tensile strength of the sized strands have the following formulas:
Cl ~ - CH2 - NH - (~H2)n - INH - (C~l2)m 3 tB3 Cl ~2C = CH _ ~ - CH2 - NH - (CH2)n - NIH (CH2)m 3 5 in which: 2 ~ n ~ 6, preferably n = 2 or 3 1 ~ m ~ 10, preferably 1 ~ m ~ 4 R is a methoxy, ethoxy, propoxy, n-butoxy or ~ -methoxyethoxy radical.
The unexpected gain in the tensile strength of the strands because of the addition of at least one of the proposed organo-silanes is obtained independently of the constituents forming the basis of the sizing, notwithstanding the different nature of these constituents, depending on the ulterior use of the strands, on the direct reinforcement of the plastic materials or on the intermediary textile trans-formations such as weaving. In addition, this gain in tensile strength is not accompanied by any destruction of the p~operties, such as the integrity, the appearance of the strands, their adhesion to the matrices to be reinforced, their resistance to abrasion, their ability to withs~and thc latter operations for their ulterior uses or for their textile transformations -- proper~ies which vary of course depenaing on iS30 the various sizing compositions used.
There is a considerable, surprising ana particularly interesting advantage to be noted when the strands are submitted to friction strains and substantial tensions, particularly during the textile transformation operations.
It was observed, in fact, that the strands sized with the compositions forming the objects of the invention undergo thes~ operations with a decrease of the nu~er of filament ruptures, of the quantit~ of hairs, or of the tangling of the strands during their passage through guide components.
This reduction of the number of breaks during twisting, warping or weaving permits operations at higher speeds, consequently leading to improvements in the fabrication yields.
These improvements also permit obtaining webs having a better appearance and possessing, as do the strands or the assemblies of strands which are used for their formation, better tensile strength.
In aadition to the considerable increase in the tensile strength of the strands brought about by the introduction into ZO the sizings of the organo-silanes aefined by the invention, it is important to emphasize that these organo-silanes have the property of being good organic glass-resin bindiny agents and assure the cohesion of the matrix to be reinforced and the strands or the webs. The two properties, that is the increase in the tensile strength and the good organic glass-resin bond, are thus both present with these organo-silanes contrary to what happens with the standard silanes known and used up to the present as binding agents o~ glass ana resins to be reinforcea. Because of the fact that the same organo~silane component performs two functions at the same time, the sizings for strands to be used for the reinforcement of organic resins contain, according to the invention, besi~es 15~V
the usual adhesive ag~nts, at least one organo-silane from the group defined hereabove in place of the organo-silane usually used as organic glass-resin binding agent. It is, however, possible to use in these sizings a mixture of standard organosilanes from prior art and organo-silanes having the property of increasing the tensile strength of the strands.
Among the sizin~s for~ing obje~ts of the invention, the preferrea compositions are the following (expressed in parts by weight of active materials per loo parts of sizing):
- 1 to 10% of at least one adhesive agent, such as an acrylic polymer, a polyvinyl acetate, an epoxy resin, a polyester resin, a polyurethane, - 0.05 to 5% of non-ionic lubricant~sJ, - o.l to 2% of at least one organo-silane from the group comprised of the organo~silanes containing an organic chain of the polyazamide type and the organo-silanes whose organic chain contains at least one phenyl raaical and at least two secondary or tertiary amine groups, - 0 to 5% of cationic lubricant(s), - 0 to 3% of coadhesive, such as gelatin, - 0 to 2% of another silane or some so~t of glass-resin binding agent.
- complement: demineralize~ water.
Among the non-ionic lubricants generally used in such compositions, those that can be cited are, for example, polyethylene emulsions or non-ionic polyethylene glycol derivatives or oxyethylenated alkylphenols~ Most often used as the cationic lubricant are condensates of fatty acids on polyethoxylated amino-alcohols, or amino derivatives of fatty bodies.
According to the present invention ~he organo-silanes S:30 from the group previously defined can even be introduced into the sizing compositions for strands, which, in the form of continuous assemhlies or of strands cominy directl~l from dies, are incorporated, for example, with epoxy, phenolie, vinyl-ester, or polyester resins according to a winding technique.In this case the adhesive agent contained in the sizing is preferably either a polyester resin, an epoxy resin or mixtures of the two depending on the nature of the organic matrix to be reinforced. Here again the presence of these organo-silanes lo is accompanied by a gain in the tensile strength of the gathered strands and decreases the risk of rupture of the strands during the winding operation on one hana and, on the other hand, permits obtaining a glass-resin bond at least as good as that obtained with the standard organo-silanes.
For the same reasons, it is advantageous to introduce at least one of these organo-silanes in the sizing compositions for strands which, in the form of assemblies, must be ultimately unwound at great speed so as to undergo a cutting operation.
During this operation the aBove cited advantages are found, these advantages relative to the number of strand ruptures and to the yields resulting from the increased tensile strength of the strands.
The addition, to the sizings, of the organo-silanes defined by the present invention in proportions above the upper limit of 2% in weight brings no further improvement to the tensile strength of the strands and may elsewhere cause either a substantial modification of the stiffness of these strands or a decrease in the protection of the strand causing the appearance of broken filaments during the ulterior trans-formation operations.
Of course the use of these organo-silanes for the over-siziny or coating of stranas having been preliminarily sized ii3~
in the usual way displays similar advantages.
In the fol]owing examples, relating to a few methods of particular embodiments showing certain advantages of the invention, the tensile strength of the strands has been expressea independently o~ the area or of the size of these strands, that is in the form of stress. Each value corresponds to a mean established from several tests.
Example 1 ~ sizing is prepared for strands in the form of webs to be used for reinforcing organic matrices. The composition for this sizing, expressed in parts by weight o~ active materials per 100 parts of sizing is the following:
~ of active materials -adhesive agent: acrylonitrile, acrylamide and acrylic acid, acrylic copolymer in the respective proportions of 45%, 50%, 5%.... ~................ 3.5 - co-adhesive agent: epoxy resin with a base of hisphenol A and epichlor-20hydrine (epoxy index 1.60 EG~kg), modified to 50~ b~ diethanolamine in ethylene glycol monomethylic ether 0.25 - a non-ionic lubricant with a base of polyethylene glycol monolaurate 3no, 25polyethylene glycol 600 dioleate an2 monoethylene glycol dioleate..................... 1.5 - organo-silane of the general formula (C) with ~ = methoxy, n = 2, m = 3:
Cl CH2 = CH - ~ -CH2 - ~IH - (CH2~2 - NH - (CH2~3 - Si~OCH3~3 0.25 H
Bi ln 53~J
- demineralized water .. complement to 100 The acrylic copolymer used has a pH of 7.8 in solution and, at a concentration of 41~, a viscosity of 3900 cPo, a viscosity measured by the Brookfield viscometer, speed 20, module 4 at 20C.
For the first step a 5~ solution of this partially neutral;zed acrylic copolymer is formed by adding triethanola-m;ne to water at 15-20C and aajusted to pH = 5. The non-ionic lubricant, preliminarily dilutea with 50% water ana brought to a pH between 5 an~ 5~5, is incorporated with this solution.
Elsewhere, the 10% epoxy resin solution at pH=5 is added to the preceding mixture.
In a second tank a hydrolysis of the silane is carried out by this silane being introduced into water brought to a pH=4 by acetic acid, the concentration of silane being below 3%. ~t the end of the hydrolysis, the pT-I is adjusted to a value of 4.7. The hydrolyzed silane is then added to the mixture of acrylic copolymer, lubricant and epoxy resin, the final pH being 5+ 0.2.
This sizing is applied at a temperature of 23C during the fiberization of standard glass by the means of sizing r~bb~r~æ eo~ be/f apparatus of the type with~apron. In this example the strand is formed by the union of 9~m filaments coated with the preceding composition. The amount of dry sizing deposited on the strand is determined by loss by burning at 625~Cuntil a constant weight is attained; it rises to 0.65% with relation to the weight of the strana. The strand is submitted to a first twisting of 40 turns per meter and the tensile strength is measured in the known manner by the method described by B.I.S.F.A~ The strands having undergone a twisting of 20 or 40 turns per meter have a tensile strength of 206 kgf/mm2 which, when compared to the values normally reached with standard ,~,, ~, lS3~) sizing compositions such as ~n control example T hereafter, is considerably higher.
~ontrol Example T
In order to demonstrate the increase in tensile strenyth attributed to the organo-silane contained in si~ing example 1, by following the same operatory conaitions as those above, a control composition is preparea containing the same basic components as in the preceding composition, hut the organo-silane is replaced by one of the organo-silanes most currently 1~ used in the techni~ues, that being ~ -aminopropyl-triethoxy-silane. Thus 0.25% of this silane is introduced into the standard composition which is applied to 9~m ~ilaments. The strand obtained possesses a drysizing rate of 0.65~ and displays, after undergoing an identical twisting of 20 to 40 turns per meter, a tensile strength of 142 kgf/mm2.
A comparison of the values for the tensile strengths of the strands coated with the sizing o~ example T and the strands coated with the composition containing the silane from example 1 shows a gain of 46%, which clearly allows for an improvement in the properties of the obtained webs. In fact, textile operations are performed without any difficulties with the stranas sized by means of -the composition according to the invention, while these same textile operations had disturbances when the usual organo-silane such as that in example T was used.
The characteristics of the webs produced in the two cases are collected in comparative table A and show a clear improvement as compared to t~e control.
The webs are d;~rectly incorporated, that is without a preliminary desizing, with the epoxy or polyester resins according to the usual methods. Laminations result the mechanical performances of which are improved in the case of the example according to the invention. These results are L53(~
shown, in the same comparative table A, for laminations with a polyester resin base. Not only is the effectiveness of the organo-silane as a bindin~ agent shown, but, also, its superiority relati~e to glass-resin adhesion, when compared with the usual organo-silane of example T.
TABLE A
Sizing Control composition ¦Composition of ~ T with a usual example 1 with an binding agent: organo-silane ~ ~-amino-propyl- according to the Properties ~ triethoxysilane invention ....
Tensile strength 142 206 in kgf/mm2 _ Tensile strength in kgf of a can~as web HG 30 chain and web ~measured in chain sense in 50 mm test specimen) 275 3S0 ini- ~
Flexion strength in tial kgf/mm2 of a polyester com- 110 156 composite reinforced p~site web HG 30 (measured after 7 according to method 24 71 9 B of norm ~NF.T57105~ boiling l Iwater __ - Example 2 The organo-silane used in the example 1 composition is replaced with 0.20% of a preliminarily hydrolyzed organo-silane including a polyazamide type of chain. This organo-silane which bears the reference Y 5987 (Union Carbide) has the general formula (A~ in which y = 0.92; R = methoxy radical; n = 2 Rl = R3 = et~ylene radical R2 = hydroxy-cyclohexyl~ethy]ene, the cyclohexyl radical ~ 13 .,~P, ~l~lS3~
being bonded to the ~itrogen and the ethylene to the silicon atom.
The operatory conditions for hydrolysis of this silane, the preparation o~ the sizi.ng and the application onto the filaments are identical to those of example 1. Strands having a dry sizing rate of 0.60% and a tensile strength of 184 kgf/mm2 are obtained showing an improvement of 30% as compared with example T. The results with respect to the textile abilities are rather comparable with those of example l; this formula permits, on the other hana, the achievement of good mechanical performances for laminations with an epoxy resin base.
Exa~ple 3 A sizing ~s prepared according to the same operatory conditions and conta~nin~ the same proportions of adhesive agents, co~adhesi`ve ana lubricant as in example 1, but for the silane a mixture including 0.1% of a silane of general formula CB1 is ~sed in which ~ = methoxy, n = 2, m = 3-Cl CH.2 - NH(CH212 ~ N~H (CE2~3 3 3 H
and including 0.15% of ~-methacryloxypropyl-trimethoxysilane.
The sized strands, haviny a dry sizing rate of 0.60%, display, after twisting, a tensile strength of 189 kgf/mm2.
By comparing this result with the results obtained with example T, it can be concluded that there is a further gain of 34% over the tensile strength values of the strands from use of 0.1% of the first of the silanes hereabove. The mixture of these two silanes permits one to obtain, on the other hand, strands or webs which can be incorporated directly with epoxy or polyester resins in order to give, in the two cases, laminations having good mechanical strength.
~' Example 4 A sizing for strands to be used in the form of webs to re:inforce organic synthetic materials such as phenolic polyester, or epoxy resins is prepared from the following components:
% of active materials - adhesive: plasticized polyvinyl acetate .................. 2.8 non-plasticized poly--vinyl acetate ............ 0.3 - co-adhesive: geIatine .............. 0.27 - non-ionic lubricant with a base of polyethylene glycol 300 monolaurate, polyethylene glycol 600 dioleate and monoethylene glycol dioleate ......... 1.5 - organo-silane of formula (C) with R - methoxy, n = 2, m = 3.
Cl CH2 = CH ~ ~ _ CH2 - ~I-CCH2)2 - NH - (CH2)3 - Si(OCH3)3 H
- demineralized water ........... to loo First a 10~ solution is prepared in water with a mixture of the two polyvinyl acetates by adding the polyvinyl acetates, under mild agitation, to the water at 15-20C. In a second tank the gelatin is dispersed into water brought to around 80C
so as to form a 10~ pseudo-solution and the agitation is maintained for 30 minutes until a clear liquid is obtained.
After cooling to 30C with the addition of cold water, the pH
is brought to 5.
Elsewhere, the hydrolysis of the silane is brought about as described previously by introducing the silane into water at pH = 4 in a concentration below 3%.
The final mixture is formed by adding together the dispersed gelatin, the polyvinyl acetates in solution, the preliminarily diluted 10% lubricant and the hydrolyzed silane.
It is complemented with water in order to bring it to the correct volume and if necessary, the pH is adjusted to a 4.7 value.
The final composition presents a dry extract of 4.4%.
This sizing is applied at 23C during fiberization to 9~m and 13~ m filaments.
The strands obtained have a dry sizing rate of 0.80%.
Measurements of the tensile strengths of the twisted strands show values of 204 kgf/mm2.
Control Example T
Strands fabricated under the same conditions with this same sizing formula, in which the orsano-silane is replaced by an equal ~uantity of ~-aminopropyltriethoxysilane, have a tensile strength of 142 kgf/mm .
Thus an improvement of 44% in the tensile strength of the strands is noted as compared with strands sized with the composition of example T', incorporating the currently used silane. There is an improvement in the capability of the strands to withstand textile transformations with the strands obtained with the sizing containing the silane o~ general formula (C) from example 4. The webs incorporated directly with the phenolic or polyester epoxy resins lead to laminations in which the glass-resin adhesion is at least as good as with example T'.
Example 5 Example 4 is repeated by replacing the silane with 0.20% of an organo-silane of formula (B) in which R - methoxy, n = 2, m = 3.
Cl ~ C~2 ~ NH - (C~2)2 - ~1l (C 2)3 3 3 H
Strands are obtained which have a 0.80% dry sizing rate and which, after being submitted to a first twisting of 20 or 40 turns per meter, have a tensile strength of 18~ kgf/mm2.
This value corresponds to a gain of 33% as compared with the tensile strengths of the strands sized with the composition of example T', containing ~-aminopropyl-triethoxysilane.
_ ample 6 A sizing is prepared in order to form strands with a base of 14~m filaments used for the reinforcement by a filament winding technique of organic matrices with a polyester and epoxy resin base.
This sizing has the following composition:
of active materials - bisphenol polyester resin (~TJ.AC 387)................................ 0.3 n = 35,000 cPo at 25C
specific weight = 1.5 - non~modified epoxy resin (ARALDITE CY 207)........................... o.g - polyvinylpyrolidone......................... 0.9 7 = 50 at 70 cPo at 20C in ~%
solution - non-ionic surface-active component w~th alkylphenol polyethoxyether base............ 0.1 - epoxy resin with a base of bisphenol A and epichlorhydrine (epoxy index 1.60 Eq/kg of which 50% of the oxirannes have reacted with the diethanolamine in ~he presence of ethylene glycol monomethylic ether 0.25 ~ 15~(1 - organo-silane of formula ~C) with R = methoxy, n = 2 m - 3:
CH2 = CH ~ ~ 2 (CH2)2 N,H - (CH2)3 - Si(OCH3)3 Q.25 H
- demineralized water ~......... to 100 The non-modified epoxy resin is first melted at ~0C
then brought to 100~C. The polyester and a portion of the surface-active component (about 70%) is added to it and a strong agitation is maintained until a complete dissolution of the surfactant is complete. Then the remainder of the preliminarily dissol~ed surfactant is incorporated with demineralized water brought to 75C.
The polyvinylpyrolidone in a 10% solution in water is then introduced slowly into the preceding mixture and everything is homogenized for 15 minutes, then cooled. The agitation is continued in the tank along with passage through a pressure pump until the temperature stabilizes at around 45C.
The emulsion thus obtained has a dry extract of 50%. The emulsion is diluted with the addition of twice its weight of demineralized water at 15C.
In another tank the organo-silane is hydrolyzed, by being introduced into demineralized water at 15C brou~ht to pH=4 by lactic acid, in such a way so as to form a solution with a concentration below 3%. The agitation is maintained after the end of the hydrolysis in order to obtain a perEectly clear solution.
The hydrolyzed organo-silane is then incorporated with the resin emulsion contained in the first tank and the pH is adjusted to 4 by lactic acid before the introduction of the epoxy resin modified by diethanolamine. After the addition of this resin, the pH is brought to 3.7 if there is need and the remainder of the water is added.
This sizing, maintained at a temperature of 2~C, has a dry extract of 2.70% determined by evaporation in an oven at 105C for 4 hours.
The sizing is applied at a temperature of 23C to 14~m filaments. A strand is obtained which has a dry si~ing rate of 0.40% of its weight and which displays a tensile strength of 204 kgf/mm2.
Control Example T"
Following the sarne method a control sizing is prepared formed from the same basic constituents in identical proportions but the organo-silane ;s replaced with 0.25~ of a binding agent usually incorporated in these compositions, that is ~-methacryl-oxypropyl-trimethoxysilane. The 14~m filaments coated with this sizing at a temperature of 23C produce strands whose dry sizing rates are 0.42%, while the tensile strengths are risen to 140 kgf~mm2.
The results obtained with the strands coated with the composition using the organo-silane from example 6 are clearly superior to those of T"; the comparison of the tensile strength values in fact shows a gain of 46%.
The gathered parallel strands have in addition a shiny and better appearance than the products sized with the usual composition T" due to the absence of broken filaments and due to ~heir good adhesion to the thermoset polyester or phenolic epoxy resins.
Example 7 By replacing the organo~silane from example 6 with 0.25%
of organo-silane of formula (B) w~th R = methoxy, n = 2, m = 3:
Cl~
CH - NH - ~CH2)2 NH - (CH2)3 3 3 e~uivalent results are obtained; however, the composition formed is more particularly adaptable to reinforcing epoxy resins.
~ 19
It also concerns both a method for fabricating glass fibers with great tensile strength, in which method these a~ueous compositions are applied to the fibers, and the obtained fibers~
The glass fibers are fabricated in a known manner through the attenuation of molten glass threads flowing from ~ie orifices. These glass threads are thinned aown in order to form continuous filaments by means of an attenuation carried out by the winding of the filaments, after being gathered in the form of a strand, on a support borne by a winder turning at great speed. Before being gathered in the form of a strand, the filaments are coated with a sizing by being passed over a continuously fed sizing component.
The sizing is applied for the purpose of preventing the mutual abrasion and the rupturing of the individual filaments when the strana is submitted to a certain number of transformations auring its fabrication or utilization.
Particularly, if the strand must undergo certain textile operations, such as twisting, cabling, warping, pirn winding or weaving, before being incorporated with the organic resins to be reinforced, it is necessary for it to be coated with a coating with good protective and lubricating properties so that the strand can support ~riction during its speedy passage through guide elements. The sizing must also establish an adhesion or sufficient cohesion of the filamen-ts to each other so as to give the strand integrity. The protective anti-abrasion property and unity are essential when the strand undergoes all the aforementioned textile transformation operations.
~L~;Z1530 In another connection, where the strands or webs are used for thc reinforcement of plastic materials, the sizing must be compatible with the matrices to be reinforced and must improve the aahesion of the strands to these matrices so that laminations with good mechanical and dielectrical properties are obtained.
Generally the sizing is a solution or an aqueous dispersion composed essentially of one or several adhesive or film forming agents, contributing to the integrity of the strands; of lubricants, for protecting the filaments and strands against abrasion; and possibly of binding agents favoring adhesion of the filaments to the organic matrices to be reinforced.
~arious additives, such as products stahilizing the emulsions, antistatic products, fungicides or softening agents, can also be added to these sizing compositions, depending on the ultimate range of applications of the strands.
The sized strands can be used in the form of cut strands and are in this case directly submitted lo a cutting operating after fiberization or after the formation of the assemblies ~union of parallel strands without twisting);
these cut strands are then incorporated with the thermoplastic or thermoset s~nthetic resins. The strands can also be used in the form of twisted or untwisted, continuous strands and ~5 can be used for textiles as well as for the reinforcement of the said resins.
The present invention relates particularly to sizings permitting fabrication of strands capable of supporting the strains to which they are submitted during their transforma-tions or ulterior utilizations such as twisting, cabling, sectionalwarping, weaving, wrapping, bra}ding~ filament winding or ~utting. The sizings according to the invention are ~i 2 3~
conducive to s-trands displaying not only strong unity and good adhesion to the matrices to be reinforced, but they also allow for a considerable decrease in the number of filament ruptures and for an improvement in the yields during these transformation opera~ions.
The invention relates to compositions containing, in addition to the usual basic ingredients for coating glass fibers, at least one component from an organosilane family, the formula for whic~ is given hereafter, one particular characteristic of which is that it considerably increases the tensile stren~th of the strands without affecting their other properties, particularly their behavior during textile operations.
In order to coat glass fibers to be used in the form of continuous strands, for reinforcing plastic materials, it is well known to use a~ueous sizings containing:
- adhesive agents such as polyvinyl acetate, acrylic resins, polyesters, epoxy resins, polyurethanes, - lubricating agents;
- and at least one component of the organo-silane type.
This organo-silane component serves as a binding or brid~in~ agent of the glass to the or~anic resins and thus assures comptability of the glass fibers with the resins to be reinforced. However, the organosilanes used most often in these sizings, such as ~ -aminopropyltriethoxysilane, vinyltriacetoxysilane, ~ ~ -~mino-ethyl ~ -amino-propyltri-methoxysilane,--methacrvloxyprop~l~imethoxysilane, ~henyl-f ~ -metf?o,~yethox yst ~a~eJ
C trimethoxysilane vinyl-tri- ~ ~ ,practically do not improve the tensile strength of the sized strands and only provide them the property of ~ood adhesion to the matrices to be reinforced. The same holds true for other prior art organo-silanes which are more rarely used, such as 1~
LS3~
polyaminopropyl-trimethoxysilane or ~ - (3,4-epoxy cyclohexyl) ethyl-tri-methoxysilane, or paraaminophenyltrihydroxysilane.
In another case, when strands coated with these known sizings are first woven so as to then be used in the form of webs for the reinforcement of plastic materials, the various components of the incorporated organo-silane type do not allow for obtain-ing strands possessing integrity, sliding ability and tensile strength strong enough for the twisting, winding on a warp beam and weaving operat;ons to be carried out without filament lo rupture or other difficulties. These conditions thus considerahly decrease the yielas from the operations and also the quality of the webs.
For this application, the publication of French patent 2,259,127 also proposed aqueous sizings containing a partially baked starch, a paraEin wax, an emulsifier, a cationic lubricant and organo-silane of the formula:
H2C = C - C - O - NH~ - CH~ - CH2 - NH - (CH2)3 - Si ~OCH3)3 However, the preceding composition seems to be the only one giving strands leading to satisfactory results during textile operations. In fact, it is specifically stated that replacing this organo-silane with another silane such~ ~-methacryl-oxypropyltrimethoxy-silane totally destroys the ability of the strands to withstand these te~tile operations. In addition, the addition of this organo-silane type of component to the sizings does not seem to improve the tensile strength of the strand in contrast to the use of particularly active organo-silanes as proposed by the invention.
According to the present invention, the addition to the sizing for glass fibers of one or several specific silanes comprising the group defined hereafter surprisingly improves the tensile strenyth of the sized strands, this improvement being generally in an amount of 20 to 60~ depending on the types o strands and the sizing components; this takes place without any effect on the other properties of these strands.
The aqueous compositions forming objects of the invention essentially contain the following elements, the rates for which are expressed throughout the description in weight parts of active materials per 100 parts of the total:
- 0.5 to 15% oE adhesive agent(s), lo - o . 1 to 2~ of at least one organo-silane from the group comprised of the organo-silanes containing an organic chain of the polyazamide type and of the organo-silanes, the organic chain of which contains at least one phenyl radical and at least two secondary or tertiarv amine groups, - 0 to 7% of lubricant(s), - 0 to 2% of another silane or a glass resin binding agent of some sort.
- complementt demineralized water.
The proposed organo-silanes with a polyazamide type of organic chain have the following formula:
H CNH (CH2)n NH Rl C]x CNH (CH2)n I R3 CO~ y NH (CH~)n NH2 Si(~)3 in which:
0.5 ~ y 6 15; 2~ n ~6 and preferably n = 2 or 3.
R is a methoxy, ethoxy, propoxy, n-butoxy or ~ ~methoxyethoxy radical.
ol ~ va l~n,~
C Rl and R3 are~alkylene di-ad radicals containing 1 to 3 carbon atoms.
/er7?' R2 represents a substituted or non-substituted~cycloaliphatic, aromatic or ali~hatic ~ radical.
B~
The various methods for fabrication of these components, the nature of the radicals and the values of x and y as a function of the method used are described in detail in U.S. patent 3,746,738.
Organo-silanes whose organic chain encompasses at least one phenyl radical and at least two secondary or tertiary amine groups reacting substantia]ly on the tensile strength of the sized strands have the following formulas:
Cl ~ - CH2 - NH - (~H2)n - INH - (C~l2)m 3 tB3 Cl ~2C = CH _ ~ - CH2 - NH - (CH2)n - NIH (CH2)m 3 5 in which: 2 ~ n ~ 6, preferably n = 2 or 3 1 ~ m ~ 10, preferably 1 ~ m ~ 4 R is a methoxy, ethoxy, propoxy, n-butoxy or ~ -methoxyethoxy radical.
The unexpected gain in the tensile strength of the strands because of the addition of at least one of the proposed organo-silanes is obtained independently of the constituents forming the basis of the sizing, notwithstanding the different nature of these constituents, depending on the ulterior use of the strands, on the direct reinforcement of the plastic materials or on the intermediary textile trans-formations such as weaving. In addition, this gain in tensile strength is not accompanied by any destruction of the p~operties, such as the integrity, the appearance of the strands, their adhesion to the matrices to be reinforced, their resistance to abrasion, their ability to withs~and thc latter operations for their ulterior uses or for their textile transformations -- proper~ies which vary of course depenaing on iS30 the various sizing compositions used.
There is a considerable, surprising ana particularly interesting advantage to be noted when the strands are submitted to friction strains and substantial tensions, particularly during the textile transformation operations.
It was observed, in fact, that the strands sized with the compositions forming the objects of the invention undergo thes~ operations with a decrease of the nu~er of filament ruptures, of the quantit~ of hairs, or of the tangling of the strands during their passage through guide components.
This reduction of the number of breaks during twisting, warping or weaving permits operations at higher speeds, consequently leading to improvements in the fabrication yields.
These improvements also permit obtaining webs having a better appearance and possessing, as do the strands or the assemblies of strands which are used for their formation, better tensile strength.
In aadition to the considerable increase in the tensile strength of the strands brought about by the introduction into ZO the sizings of the organo-silanes aefined by the invention, it is important to emphasize that these organo-silanes have the property of being good organic glass-resin bindiny agents and assure the cohesion of the matrix to be reinforced and the strands or the webs. The two properties, that is the increase in the tensile strength and the good organic glass-resin bond, are thus both present with these organo-silanes contrary to what happens with the standard silanes known and used up to the present as binding agents o~ glass ana resins to be reinforcea. Because of the fact that the same organo~silane component performs two functions at the same time, the sizings for strands to be used for the reinforcement of organic resins contain, according to the invention, besi~es 15~V
the usual adhesive ag~nts, at least one organo-silane from the group defined hereabove in place of the organo-silane usually used as organic glass-resin binding agent. It is, however, possible to use in these sizings a mixture of standard organosilanes from prior art and organo-silanes having the property of increasing the tensile strength of the strands.
Among the sizin~s for~ing obje~ts of the invention, the preferrea compositions are the following (expressed in parts by weight of active materials per loo parts of sizing):
- 1 to 10% of at least one adhesive agent, such as an acrylic polymer, a polyvinyl acetate, an epoxy resin, a polyester resin, a polyurethane, - 0.05 to 5% of non-ionic lubricant~sJ, - o.l to 2% of at least one organo-silane from the group comprised of the organo~silanes containing an organic chain of the polyazamide type and the organo-silanes whose organic chain contains at least one phenyl raaical and at least two secondary or tertiary amine groups, - 0 to 5% of cationic lubricant(s), - 0 to 3% of coadhesive, such as gelatin, - 0 to 2% of another silane or some so~t of glass-resin binding agent.
- complement: demineralize~ water.
Among the non-ionic lubricants generally used in such compositions, those that can be cited are, for example, polyethylene emulsions or non-ionic polyethylene glycol derivatives or oxyethylenated alkylphenols~ Most often used as the cationic lubricant are condensates of fatty acids on polyethoxylated amino-alcohols, or amino derivatives of fatty bodies.
According to the present invention ~he organo-silanes S:30 from the group previously defined can even be introduced into the sizing compositions for strands, which, in the form of continuous assemhlies or of strands cominy directl~l from dies, are incorporated, for example, with epoxy, phenolie, vinyl-ester, or polyester resins according to a winding technique.In this case the adhesive agent contained in the sizing is preferably either a polyester resin, an epoxy resin or mixtures of the two depending on the nature of the organic matrix to be reinforced. Here again the presence of these organo-silanes lo is accompanied by a gain in the tensile strength of the gathered strands and decreases the risk of rupture of the strands during the winding operation on one hana and, on the other hand, permits obtaining a glass-resin bond at least as good as that obtained with the standard organo-silanes.
For the same reasons, it is advantageous to introduce at least one of these organo-silanes in the sizing compositions for strands which, in the form of assemblies, must be ultimately unwound at great speed so as to undergo a cutting operation.
During this operation the aBove cited advantages are found, these advantages relative to the number of strand ruptures and to the yields resulting from the increased tensile strength of the strands.
The addition, to the sizings, of the organo-silanes defined by the present invention in proportions above the upper limit of 2% in weight brings no further improvement to the tensile strength of the strands and may elsewhere cause either a substantial modification of the stiffness of these strands or a decrease in the protection of the strand causing the appearance of broken filaments during the ulterior trans-formation operations.
Of course the use of these organo-silanes for the over-siziny or coating of stranas having been preliminarily sized ii3~
in the usual way displays similar advantages.
In the fol]owing examples, relating to a few methods of particular embodiments showing certain advantages of the invention, the tensile strength of the strands has been expressea independently o~ the area or of the size of these strands, that is in the form of stress. Each value corresponds to a mean established from several tests.
Example 1 ~ sizing is prepared for strands in the form of webs to be used for reinforcing organic matrices. The composition for this sizing, expressed in parts by weight o~ active materials per 100 parts of sizing is the following:
~ of active materials -adhesive agent: acrylonitrile, acrylamide and acrylic acid, acrylic copolymer in the respective proportions of 45%, 50%, 5%.... ~................ 3.5 - co-adhesive agent: epoxy resin with a base of hisphenol A and epichlor-20hydrine (epoxy index 1.60 EG~kg), modified to 50~ b~ diethanolamine in ethylene glycol monomethylic ether 0.25 - a non-ionic lubricant with a base of polyethylene glycol monolaurate 3no, 25polyethylene glycol 600 dioleate an2 monoethylene glycol dioleate..................... 1.5 - organo-silane of the general formula (C) with ~ = methoxy, n = 2, m = 3:
Cl CH2 = CH - ~ -CH2 - ~IH - (CH2~2 - NH - (CH2~3 - Si~OCH3~3 0.25 H
Bi ln 53~J
- demineralized water .. complement to 100 The acrylic copolymer used has a pH of 7.8 in solution and, at a concentration of 41~, a viscosity of 3900 cPo, a viscosity measured by the Brookfield viscometer, speed 20, module 4 at 20C.
For the first step a 5~ solution of this partially neutral;zed acrylic copolymer is formed by adding triethanola-m;ne to water at 15-20C and aajusted to pH = 5. The non-ionic lubricant, preliminarily dilutea with 50% water ana brought to a pH between 5 an~ 5~5, is incorporated with this solution.
Elsewhere, the 10% epoxy resin solution at pH=5 is added to the preceding mixture.
In a second tank a hydrolysis of the silane is carried out by this silane being introduced into water brought to a pH=4 by acetic acid, the concentration of silane being below 3%. ~t the end of the hydrolysis, the pT-I is adjusted to a value of 4.7. The hydrolyzed silane is then added to the mixture of acrylic copolymer, lubricant and epoxy resin, the final pH being 5+ 0.2.
This sizing is applied at a temperature of 23C during the fiberization of standard glass by the means of sizing r~bb~r~æ eo~ be/f apparatus of the type with~apron. In this example the strand is formed by the union of 9~m filaments coated with the preceding composition. The amount of dry sizing deposited on the strand is determined by loss by burning at 625~Cuntil a constant weight is attained; it rises to 0.65% with relation to the weight of the strana. The strand is submitted to a first twisting of 40 turns per meter and the tensile strength is measured in the known manner by the method described by B.I.S.F.A~ The strands having undergone a twisting of 20 or 40 turns per meter have a tensile strength of 206 kgf/mm2 which, when compared to the values normally reached with standard ,~,, ~, lS3~) sizing compositions such as ~n control example T hereafter, is considerably higher.
~ontrol Example T
In order to demonstrate the increase in tensile strenyth attributed to the organo-silane contained in si~ing example 1, by following the same operatory conaitions as those above, a control composition is preparea containing the same basic components as in the preceding composition, hut the organo-silane is replaced by one of the organo-silanes most currently 1~ used in the techni~ues, that being ~ -aminopropyl-triethoxy-silane. Thus 0.25% of this silane is introduced into the standard composition which is applied to 9~m ~ilaments. The strand obtained possesses a drysizing rate of 0.65~ and displays, after undergoing an identical twisting of 20 to 40 turns per meter, a tensile strength of 142 kgf/mm2.
A comparison of the values for the tensile strengths of the strands coated with the sizing o~ example T and the strands coated with the composition containing the silane from example 1 shows a gain of 46%, which clearly allows for an improvement in the properties of the obtained webs. In fact, textile operations are performed without any difficulties with the stranas sized by means of -the composition according to the invention, while these same textile operations had disturbances when the usual organo-silane such as that in example T was used.
The characteristics of the webs produced in the two cases are collected in comparative table A and show a clear improvement as compared to t~e control.
The webs are d;~rectly incorporated, that is without a preliminary desizing, with the epoxy or polyester resins according to the usual methods. Laminations result the mechanical performances of which are improved in the case of the example according to the invention. These results are L53(~
shown, in the same comparative table A, for laminations with a polyester resin base. Not only is the effectiveness of the organo-silane as a bindin~ agent shown, but, also, its superiority relati~e to glass-resin adhesion, when compared with the usual organo-silane of example T.
TABLE A
Sizing Control composition ¦Composition of ~ T with a usual example 1 with an binding agent: organo-silane ~ ~-amino-propyl- according to the Properties ~ triethoxysilane invention ....
Tensile strength 142 206 in kgf/mm2 _ Tensile strength in kgf of a can~as web HG 30 chain and web ~measured in chain sense in 50 mm test specimen) 275 3S0 ini- ~
Flexion strength in tial kgf/mm2 of a polyester com- 110 156 composite reinforced p~site web HG 30 (measured after 7 according to method 24 71 9 B of norm ~NF.T57105~ boiling l Iwater __ - Example 2 The organo-silane used in the example 1 composition is replaced with 0.20% of a preliminarily hydrolyzed organo-silane including a polyazamide type of chain. This organo-silane which bears the reference Y 5987 (Union Carbide) has the general formula (A~ in which y = 0.92; R = methoxy radical; n = 2 Rl = R3 = et~ylene radical R2 = hydroxy-cyclohexyl~ethy]ene, the cyclohexyl radical ~ 13 .,~P, ~l~lS3~
being bonded to the ~itrogen and the ethylene to the silicon atom.
The operatory conditions for hydrolysis of this silane, the preparation o~ the sizi.ng and the application onto the filaments are identical to those of example 1. Strands having a dry sizing rate of 0.60% and a tensile strength of 184 kgf/mm2 are obtained showing an improvement of 30% as compared with example T. The results with respect to the textile abilities are rather comparable with those of example l; this formula permits, on the other hana, the achievement of good mechanical performances for laminations with an epoxy resin base.
Exa~ple 3 A sizing ~s prepared according to the same operatory conditions and conta~nin~ the same proportions of adhesive agents, co~adhesi`ve ana lubricant as in example 1, but for the silane a mixture including 0.1% of a silane of general formula CB1 is ~sed in which ~ = methoxy, n = 2, m = 3-Cl CH.2 - NH(CH212 ~ N~H (CE2~3 3 3 H
and including 0.15% of ~-methacryloxypropyl-trimethoxysilane.
The sized strands, haviny a dry sizing rate of 0.60%, display, after twisting, a tensile strength of 189 kgf/mm2.
By comparing this result with the results obtained with example T, it can be concluded that there is a further gain of 34% over the tensile strength values of the strands from use of 0.1% of the first of the silanes hereabove. The mixture of these two silanes permits one to obtain, on the other hand, strands or webs which can be incorporated directly with epoxy or polyester resins in order to give, in the two cases, laminations having good mechanical strength.
~' Example 4 A sizing for strands to be used in the form of webs to re:inforce organic synthetic materials such as phenolic polyester, or epoxy resins is prepared from the following components:
% of active materials - adhesive: plasticized polyvinyl acetate .................. 2.8 non-plasticized poly--vinyl acetate ............ 0.3 - co-adhesive: geIatine .............. 0.27 - non-ionic lubricant with a base of polyethylene glycol 300 monolaurate, polyethylene glycol 600 dioleate and monoethylene glycol dioleate ......... 1.5 - organo-silane of formula (C) with R - methoxy, n = 2, m = 3.
Cl CH2 = CH ~ ~ _ CH2 - ~I-CCH2)2 - NH - (CH2)3 - Si(OCH3)3 H
- demineralized water ........... to loo First a 10~ solution is prepared in water with a mixture of the two polyvinyl acetates by adding the polyvinyl acetates, under mild agitation, to the water at 15-20C. In a second tank the gelatin is dispersed into water brought to around 80C
so as to form a 10~ pseudo-solution and the agitation is maintained for 30 minutes until a clear liquid is obtained.
After cooling to 30C with the addition of cold water, the pH
is brought to 5.
Elsewhere, the hydrolysis of the silane is brought about as described previously by introducing the silane into water at pH = 4 in a concentration below 3%.
The final mixture is formed by adding together the dispersed gelatin, the polyvinyl acetates in solution, the preliminarily diluted 10% lubricant and the hydrolyzed silane.
It is complemented with water in order to bring it to the correct volume and if necessary, the pH is adjusted to a 4.7 value.
The final composition presents a dry extract of 4.4%.
This sizing is applied at 23C during fiberization to 9~m and 13~ m filaments.
The strands obtained have a dry sizing rate of 0.80%.
Measurements of the tensile strengths of the twisted strands show values of 204 kgf/mm2.
Control Example T
Strands fabricated under the same conditions with this same sizing formula, in which the orsano-silane is replaced by an equal ~uantity of ~-aminopropyltriethoxysilane, have a tensile strength of 142 kgf/mm .
Thus an improvement of 44% in the tensile strength of the strands is noted as compared with strands sized with the composition of example T', incorporating the currently used silane. There is an improvement in the capability of the strands to withstand textile transformations with the strands obtained with the sizing containing the silane o~ general formula (C) from example 4. The webs incorporated directly with the phenolic or polyester epoxy resins lead to laminations in which the glass-resin adhesion is at least as good as with example T'.
Example 5 Example 4 is repeated by replacing the silane with 0.20% of an organo-silane of formula (B) in which R - methoxy, n = 2, m = 3.
Cl ~ C~2 ~ NH - (C~2)2 - ~1l (C 2)3 3 3 H
Strands are obtained which have a 0.80% dry sizing rate and which, after being submitted to a first twisting of 20 or 40 turns per meter, have a tensile strength of 18~ kgf/mm2.
This value corresponds to a gain of 33% as compared with the tensile strengths of the strands sized with the composition of example T', containing ~-aminopropyl-triethoxysilane.
_ ample 6 A sizing is prepared in order to form strands with a base of 14~m filaments used for the reinforcement by a filament winding technique of organic matrices with a polyester and epoxy resin base.
This sizing has the following composition:
of active materials - bisphenol polyester resin (~TJ.AC 387)................................ 0.3 n = 35,000 cPo at 25C
specific weight = 1.5 - non~modified epoxy resin (ARALDITE CY 207)........................... o.g - polyvinylpyrolidone......................... 0.9 7 = 50 at 70 cPo at 20C in ~%
solution - non-ionic surface-active component w~th alkylphenol polyethoxyether base............ 0.1 - epoxy resin with a base of bisphenol A and epichlorhydrine (epoxy index 1.60 Eq/kg of which 50% of the oxirannes have reacted with the diethanolamine in ~he presence of ethylene glycol monomethylic ether 0.25 ~ 15~(1 - organo-silane of formula ~C) with R = methoxy, n = 2 m - 3:
CH2 = CH ~ ~ 2 (CH2)2 N,H - (CH2)3 - Si(OCH3)3 Q.25 H
- demineralized water ~......... to 100 The non-modified epoxy resin is first melted at ~0C
then brought to 100~C. The polyester and a portion of the surface-active component (about 70%) is added to it and a strong agitation is maintained until a complete dissolution of the surfactant is complete. Then the remainder of the preliminarily dissol~ed surfactant is incorporated with demineralized water brought to 75C.
The polyvinylpyrolidone in a 10% solution in water is then introduced slowly into the preceding mixture and everything is homogenized for 15 minutes, then cooled. The agitation is continued in the tank along with passage through a pressure pump until the temperature stabilizes at around 45C.
The emulsion thus obtained has a dry extract of 50%. The emulsion is diluted with the addition of twice its weight of demineralized water at 15C.
In another tank the organo-silane is hydrolyzed, by being introduced into demineralized water at 15C brou~ht to pH=4 by lactic acid, in such a way so as to form a solution with a concentration below 3%. The agitation is maintained after the end of the hydrolysis in order to obtain a perEectly clear solution.
The hydrolyzed organo-silane is then incorporated with the resin emulsion contained in the first tank and the pH is adjusted to 4 by lactic acid before the introduction of the epoxy resin modified by diethanolamine. After the addition of this resin, the pH is brought to 3.7 if there is need and the remainder of the water is added.
This sizing, maintained at a temperature of 2~C, has a dry extract of 2.70% determined by evaporation in an oven at 105C for 4 hours.
The sizing is applied at a temperature of 23C to 14~m filaments. A strand is obtained which has a dry si~ing rate of 0.40% of its weight and which displays a tensile strength of 204 kgf/mm2.
Control Example T"
Following the sarne method a control sizing is prepared formed from the same basic constituents in identical proportions but the organo-silane ;s replaced with 0.25~ of a binding agent usually incorporated in these compositions, that is ~-methacryl-oxypropyl-trimethoxysilane. The 14~m filaments coated with this sizing at a temperature of 23C produce strands whose dry sizing rates are 0.42%, while the tensile strengths are risen to 140 kgf~mm2.
The results obtained with the strands coated with the composition using the organo-silane from example 6 are clearly superior to those of T"; the comparison of the tensile strength values in fact shows a gain of 46%.
The gathered parallel strands have in addition a shiny and better appearance than the products sized with the usual composition T" due to the absence of broken filaments and due to ~heir good adhesion to the thermoset polyester or phenolic epoxy resins.
Example 7 By replacing the organo~silane from example 6 with 0.25%
of organo-silane of formula (B) w~th R = methoxy, n = 2, m = 3:
Cl~
CH - NH - ~CH2)2 NH - (CH2)3 3 3 e~uivalent results are obtained; however, the composition formed is more particularly adaptable to reinforcing epoxy resins.
~ 19
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Aqueous sizing for coating glass fibers to be used for reinforcing thermoplastic and/or thermoset resins, characterized in that it comprises:
- 0.5 to 15% by weight of at least one adhesive agent, - 0.1 to 2% by weight of at least one organo-silane of the formulas, (A) in which ? is 0.5 to 15; n is 2 to 6; R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, R1 and R3 are divalent alkylene radicals containing 1 to 3 carbon atoms, and R2 represents a substituted or non-substituted divalent cycloaliphatic, aromatic or aliphatic radical, (B) (C) in which n is 2 to 6; m is 1 to 10 R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, -0 to 7% by weight of lubricant(s), and -0 to 2% by weight of an organic glass-resin binding agent.
- 0.5 to 15% by weight of at least one adhesive agent, - 0.1 to 2% by weight of at least one organo-silane of the formulas, (A) in which ? is 0.5 to 15; n is 2 to 6; R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, R1 and R3 are divalent alkylene radicals containing 1 to 3 carbon atoms, and R2 represents a substituted or non-substituted divalent cycloaliphatic, aromatic or aliphatic radical, (B) (C) in which n is 2 to 6; m is 1 to 10 R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, -0 to 7% by weight of lubricant(s), and -0 to 2% by weight of an organic glass-resin binding agent.
2. Aqueous sizing for coating glass fibers to be used to reinforce thermoplastic and/or thermoset resins according to claim 1, characterized in that it comprises:
- 1 to 10% by weight of an adhesive agent of an acrylic polymer, a polyvinyl acetate, an epoxy resin, a polyester resin, or a polyurethane, - 0.5 to 5% by weight of non-ionic lubricant(s), and - 0.1 to 2% by weight of at least one organo-silane of the general formula A.
- 1 to 10% by weight of an adhesive agent of an acrylic polymer, a polyvinyl acetate, an epoxy resin, a polyester resin, or a polyurethane, - 0.5 to 5% by weight of non-ionic lubricant(s), and - 0.1 to 2% by weight of at least one organo-silane of the general formula A.
3. Aqueous sizing for coating glass fibers to be used for reinforcing thermoplastic and/or thermoset resins according to claim 1, characterized in that it comprises:
- 1 to 10% by weight of at least one adhesive agent selected from an acrylic polymer, a polyvinyl acetate, an epoxy resin a polyester resin or a polyurethane, - 0.05 to 5% by weight of non-ionic lubricant(s), - 0.1 to 2% by weight of at least one organo-silane of the general formulas B and C.
- 1 to 10% by weight of at least one adhesive agent selected from an acrylic polymer, a polyvinyl acetate, an epoxy resin a polyester resin or a polyurethane, - 0.05 to 5% by weight of non-ionic lubricant(s), - 0.1 to 2% by weight of at least one organo-silane of the general formulas B and C.
4. Aqueous sizing for glass fibers to be used for reinforcing plastic materials according to claim 1, characterized in that it contains at the most up to 3% of a co-adhesive, up to 5% of at least one cationic lubricant, and up to 2% of an organic glass-resin binding agent .
5. Aqueous sizing according to claim 1, characterized in that one of the amine groups of the organo-silane is in the form of hydrochlorate.
6. Aqueous sizing according to claim 1, characterized in that it contains at least one of the organo-silanes with the general formulas:
(B) (C) in which: n is 2 to 6, m is 1 to 10 and R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical.
(B) (C) in which: n is 2 to 6, m is 1 to 10 and R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical.
7. Aqueous sizing for coating glass fibers according to claim 1, characterized in that it contains at least one of the following formulas:
in which n = 2 or 3 and m is 1 to 4.
in which n = 2 or 3 and m is 1 to 4.
8. Aqueous sizing for coating glass fibers according to claim 1, characterized in that it contains at least one of the following formulas:
in which n = 2 and m = 3.
in which n = 2 and m = 3.
9. Method for fabricating glass fibers by mechanical attenuation at great speed of molten glass threads according to which a sizing or an oversizing is deposited on the filaments, characterized in that the sizing composition deposited on the filaments, expressed in weight percentages of active materials, is the following:
- 1 to 10% by weight of at least one adhesive agent selected from an acrylic polymer, a. polyvinyl acetate, an epoxy resin, a polyester resin, a polyurethane, - 0.05 to 5% of non-ionic lubricant(s), - 0.1 to 2% by weight of at least one organo-silane of the formulas, (A) in which ? is. 0.5 to 15; n is 2 to 6; R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, R1 and R3 are divalent alkylene radicals containing 1 to 3 carbon atoms, and R2 represents a substituted or non-substituted divalent cycloaliphatic, aromatic or aliphatic radical, (B) (C) in which n is 2 to 6, m is 1 to 10 R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, - 0 to 3% of a co-adhesive, - 0 to 5% of a cationic lubricant, - 0 to 2% of a glass organic resin binding agent .
- 1 to 10% by weight of at least one adhesive agent selected from an acrylic polymer, a. polyvinyl acetate, an epoxy resin, a polyester resin, a polyurethane, - 0.05 to 5% of non-ionic lubricant(s), - 0.1 to 2% by weight of at least one organo-silane of the formulas, (A) in which ? is. 0.5 to 15; n is 2 to 6; R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, R1 and R3 are divalent alkylene radicals containing 1 to 3 carbon atoms, and R2 represents a substituted or non-substituted divalent cycloaliphatic, aromatic or aliphatic radical, (B) (C) in which n is 2 to 6, m is 1 to 10 R is a methoxy, ethoxy, propoxy, n-butoxy or .beta.-methoxyethoxy radical, - 0 to 3% of a co-adhesive, - 0 to 5% of a cationic lubricant, - 0 to 2% of a glass organic resin binding agent .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7701386 | 1977-01-19 | ||
| FR7701386A FR2377982A1 (en) | 1977-01-19 | 1977-01-19 | COMPOSITIONS FOR COATING FIBERS OF GLASS AND FIBERS SO OBTAINED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1121530A true CA1121530A (en) | 1982-04-06 |
Family
ID=9185655
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000295264A Expired CA1121530A (en) | 1977-01-19 | 1978-01-19 | Method and composition for coating glass fibers and the fibers obtained |
| CA295,290A Expired CA1124926A (en) | 1977-01-19 | 1978-01-19 | Composition and method for coating glass fibers and the fibers obtained |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA295,290A Expired CA1124926A (en) | 1977-01-19 | 1978-01-19 | Composition and method for coating glass fibers and the fibers obtained |
Country Status (20)
| Country | Link |
|---|---|
| US (2) | US4244844A (en) |
| JP (2) | JPS5390496A (en) |
| AT (2) | AT370390B (en) |
| BE (2) | BE863030A (en) |
| CA (2) | CA1121530A (en) |
| DE (2) | DE2802243A1 (en) |
| DK (2) | DK25578A (en) |
| ES (2) | ES466110A1 (en) |
| FI (2) | FI62523C (en) |
| FR (1) | FR2377982A1 (en) |
| GB (2) | GB1590051A (en) |
| IE (2) | IE46309B1 (en) |
| IT (2) | IT1093252B (en) |
| LU (2) | LU78889A1 (en) |
| MX (1) | MX147370A (en) |
| NL (2) | NL7800594A (en) |
| NO (2) | NO150726C (en) |
| SE (2) | SE426051B (en) |
| TR (2) | TR19715A (en) |
| YU (1) | YU10178A (en) |
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| US4927869A (en) * | 1988-09-15 | 1990-05-22 | Ppg Industries, Inc. | Chemically treated glass fibers for reinforcing polymers |
| FR2638448B1 (en) * | 1988-10-27 | 1992-08-21 | Saint Gobain Isover | BINDER AND BONDING THEREOF FOR MINERAL FIBERS |
| GB8829405D0 (en) * | 1988-12-16 | 1989-02-01 | Cerestar Holding Bv | Process for the manufacture of mineral fibre compositions |
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| EP0624176A4 (en) * | 1992-01-30 | 1995-02-01 | Ppg Industries Inc | Starch oil sizing composition and glass fibers treated therewith. |
| US5405895A (en) * | 1992-07-30 | 1995-04-11 | Industrial Technology Research Institute | Surface treating compositions and methods of preparation and use in treating long glass fibers |
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| FR2727972B1 (en) * | 1994-12-13 | 1997-01-31 | Vetrotex France Sa | SIZING COMPOSITION FOR GLASS WIRES, PROCESS USING THIS COMPOSITION AND RESULTING PRODUCTS |
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| DE102008059046B4 (en) | 2008-11-26 | 2013-08-22 | S.D.R. Biotec Verwaltungs GmbH | Aqueous textile sizing for the treatment of R, E, ECR and S glass fibers and their use |
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| DE102018208691A1 (en) | 2018-01-31 | 2019-08-01 | Evonik Degussa Gmbh | Special composition of organofunctional alkoxysilanes and their use |
| EP3611236B1 (en) | 2018-08-17 | 2020-09-30 | Evonik Operations GmbH | An aqueous, storage-stable composition containing n-benzyl substituted n- (2-aminoethyl)-3-aminopropylsiloxane-hydrochlorides, method for their preparation and their use |
| EP3708569A1 (en) | 2019-03-11 | 2020-09-16 | Evonik Operations GmbH | A voc free aqueous and shelf-stable n-vinylbenzylaminalkyl-functional siloxanol and method for producing the same |
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-
1977
- 1977-01-19 FR FR7701386A patent/FR2377982A1/en active Granted
-
1978
- 1978-01-11 GB GB1066/78A patent/GB1590051A/en not_active Expired
- 1978-01-11 GB GB1065/78A patent/GB1597991A/en not_active Expired
- 1978-01-16 MX MX172061A patent/MX147370A/en unknown
- 1978-01-16 FI FI780127A patent/FI62523C/en not_active IP Right Cessation
- 1978-01-16 FI FI780128A patent/FI62524C/en not_active IP Right Cessation
- 1978-01-17 SE SE7800558A patent/SE426051B/en not_active IP Right Cessation
- 1978-01-17 TR TR19715A patent/TR19715A/en unknown
- 1978-01-17 TR TR19555A patent/TR19555A/en unknown
- 1978-01-17 YU YU00101/78A patent/YU10178A/en unknown
- 1978-01-17 SE SE7800559A patent/SE426052B/en not_active IP Right Cessation
- 1978-01-18 BE BE184413A patent/BE863030A/en not_active IP Right Cessation
- 1978-01-18 US US05/870,507 patent/US4244844A/en not_active Expired - Lifetime
- 1978-01-18 NL NL7800594A patent/NL7800594A/en not_active Application Discontinuation
- 1978-01-18 IE IE116/78A patent/IE46309B1/en unknown
- 1978-01-18 LU LU78889A patent/LU78889A1/en unknown
- 1978-01-18 US US05/870,508 patent/US4246145A/en not_active Expired - Lifetime
- 1978-01-18 NO NO780182A patent/NO150726C/en unknown
- 1978-01-18 BE BE184412A patent/BE863029A/en not_active IP Right Cessation
- 1978-01-18 NL NL7800593A patent/NL7800593A/en not_active Application Discontinuation
- 1978-01-18 ES ES466110A patent/ES466110A1/en not_active Expired
- 1978-01-18 NO NO780181A patent/NO150008C/en unknown
- 1978-01-18 DK DK25578A patent/DK25578A/en not_active Application Discontinuation
- 1978-01-18 DK DK25678A patent/DK25678A/en not_active Application Discontinuation
- 1978-01-18 LU LU78890A patent/LU78890A1/en unknown
- 1978-01-18 ES ES466111A patent/ES466111A1/en not_active Expired
- 1978-01-18 IE IE117/78A patent/IE46373B1/en unknown
- 1978-01-19 CA CA000295264A patent/CA1121530A/en not_active Expired
- 1978-01-19 IT IT9429/78A patent/IT1093252B/en active
- 1978-01-19 AT AT0040378A patent/AT370390B/en not_active IP Right Cessation
- 1978-01-19 CA CA295,290A patent/CA1124926A/en not_active Expired
- 1978-01-19 JP JP378078A patent/JPS5390496A/en active Granted
- 1978-01-19 AT AT0040278A patent/AT370389B/en not_active IP Right Cessation
- 1978-01-19 DE DE19782802243 patent/DE2802243A1/en active Granted
- 1978-01-19 DE DE19782802242 patent/DE2802242A1/en active Granted
- 1978-01-19 IT IT789428A patent/IT1093251B/en active
- 1978-01-19 JP JP377978A patent/JPS5394696A/en active Granted
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