JPS62285947A - Polyester resin composition - Google Patents

Abstract

PURPOSE:To provide the title compsn. having excellent adhesion, mechanical properties and particularly excellent impact resistance during a repeated heating- cooling cycle, by incorporating a copolymer having epoxy groups and a rubbery graft polymer in an arom. polyester. CONSTITUTION:100pts.wt. arom. polyester (A) having a relative viscosity of 1.15-2.0 (in a 0.5% o-chlorophenol soln. at 25 deg.C) (e.g., polybutylene terephthalate) is blended with 1-80pts.wt. copolymer (B) having epoxy groups and an MFR of 0.1-100g/10min, composed of 1-50wt% unsaturated monomer having an epoxy group, represented by the formula I, II or III (wherein R is a hydrocarbon group having an ethylenically unsaturated bond; X is CH2, O or a bivalent group of formula IV; and R' is H or CH3) and 99-50wt% unsaturated monomer (b) having no epoxy group and copolymerizable with the component (a) (e.g., an olefin) and 1-80pts.wt. rubbery graft polymer (C) having a glass transition temp. of not higher than -20 deg.C, obtd. by grafting a vinyl monomer such as an arom. vinyl compd. or a vinyl cyanide compd. to a base such as polybutadiene.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention <Industrial Field of Application> The present invention has good adhesion to epoxy resin and good mechanical properties, especially resistance to repeated heating and cooling. Impact e!
- Concerning an excellent polyester resin composition.

<Prior Art> Aromatic polyesters such as polyethylene terephthalate and polybutylene terephthalate are used in a wide range of fields such as electrical and electronic equipment parts and automobile parts due to their unique characteristics.

The cores for the various uses described above may be required to have high adhesiveness between the aromatic polyester and the epoxy resin, for example when used as epoxy resin casting containers. However, the adhesion between aromatic polyester and epoxy resin is not good, and the initial adhesive strength may be insufficient, or even if the initial adhesive strength is blue, it may be difficult to use it for a long time, or when it is heated.
Adhesion strength sometimes decreased with repeated cooling. For this reason, JP-A-57-100154 and other publications propose a method of using a vinyl polymer and a glycidyl group-containing copolymer in combination with an aromatic polyester.

<Problems to be Solved by the Invention> However, when the above method is applied, although the adhesion with the epoxy resin is relatively improved, the impact resistance gA is low, and cracking occurs especially when heating and cooling are repeated. Polyester resins of a satisfactory level have not been obtained due to problems such as

Means for Solving the Problems The inventors of the present invention conducted extensive studies to solve the above problems, and found that a specific glycidyl group-containing copolymer and rubber-like graft polymer were added to the aromatic polyester. The present inventors have discovered that by containing a specific amount, the adhesion to the epoxy resin is excellent, and the mechanical properties and impact resistance when repeated heating and cooling are greatly improved.

That is, the present invention is based on the aromatic polyester 100 weight loss section.
Epoxy group-containing copolymer 1 composed of an unsaturated monomer containing an epoxy group and an unsaturated monomer containing no epoxy group
~80 parts by weight and (Q rubbery graph zt coalescence 1-8
The object of the present invention is to provide a polyester resin composition containing 0 parts by weight.

(g) The aromatic polyester used in the present invention is a polyester having an aromatic ring in the chain unit of the polymer, and is composed of an aromatic dicarboxylic acid (or its ester-forming derivative) and a diol (or its ester-forming derivative). It is a polymer or copolymer obtained by a condensation reaction in which the main component is a condensation reaction.

The aromatic dicarboxylic acids mentioned here include terephthalic acid,
Isophthalic acid, orthophthalic acid, ■.

5-naphthalene dicarboxylic acid, 2,5-su7talene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, 4,4'
-Biphenyldicarboxylic acid, 3,3'-biphenyldicarboxylic acid, 4.4'-diphenyl etherdicarboxylic acid, 4.4'-diphenylmethanedicarboxylic acid, 4.4'
-diphenylsulfone dicarboxylic m, 4,4'-diphenylisopropylidene dicarboxylic acid, 1,2-bis(phenoquine)ethane-4,4'-dicarboxylic acid, 2,5-
Examples include anthracenedicarboxylic acid, 2,6-anthracenedicarboxylic acid, 4,4'-p-terphenylenedicarboxylic acid, 2,5-pyridinedicarboxylic acid, and terephthalic acid is preferably used.

Two or more of these aromatic dicarboxylic acids may be used in combination. If the amount is small, one or more types of aliphatic dicarboxylic acids such as adipic acid, azelaic acid, sebanic acid, and dodecanedioic acid, and alicyclic dicarboxylic acids such as nclohexane dicarboxylic acid may be used in combination with these aromatic dicarboxylic acids. Can be done.

In addition, as diol components, ethylene glycol, propylene gelicol, ethylene glycol, hexylene glycol, neopentyl glycol, 2-methyl-1
, 3-propanediol, diethylene glycol, aliphatic diol such as triethylene glycol, alicyclic diol such as 1,4-cyclohexane dimetatool, etc.
Preferred examples include fx, etc., and mixtures thereof. In addition, if it is a small amount, molecules 31,400 to 6,000
Long-chain diols such as polyethylene glycol, poly-1,3-propylene gelylcol, polytetramethylene glycol, etc. may be copolymerized as desired.

Specific preferred aromatic polyesters include polyethylene terephthalate, polypropylene/terephthalate, polybutylene terephthalate, polyhexylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and ethylene-1,2-bis(phenoquine)ethane. In addition to 4,4'-dicarboxylate, copolymerized polyesters such as polyethylene isophthalate/terephthalate, polybutyne/terephthalate/isophthalate, polybutylene terephthalate/decanedicarboxylate, etc. may be mentioned. Among these, polybutylene terephthalate, which has well-balanced mechanical properties and moldability, can be particularly preferably used.

The aromatic polyester used in the present invention is 0.5%
The relative viscosity of the 0-chlorophenol solution measured at 25°C is 1.15 to 2.01, particularly preferably 1.3 to L85.

Next, the 03) epoxy group-containing copolymer used in the present invention includes 1 to 50 (preferably 2 to 20) epoxy group-containing monomers and 99 to 50 (99 to 50%) monomers not containing epoxy groups. Preferably, it is an epoxy group-containing olefin-based and/or vinyl-based copolymer composed of 98 to 80% by weight.

The epoxy group-containing monomer here refers to the general formula % formula % (2 (R is a hydrocarbon group having one ethylenically unsaturated bond,
X is -C)1. -1-Q- or -Q-0-1R' is hydrogen or a methyl group), and specifically, glycidyl acrylate, glycidyl methacrylate, Itaconic acid monoglycidyl ester, butene tricarboxylic acid glycidyl ester, butene tricarbo/triglycidyl ester, 2-methylallyl glycidyl ether, vinyl glycidyl ether, 3,4-epoxybutene, 3,4-epoxy-3-methyl-1- Examples include butene, vinylcyclohexane monoxide, p-glycidylstyrene, and the like. Two or more of these epoxy group-containing unsaturated monomers can also be used in combination.

Further, the unsaturated monomers not containing an epoxy group that are copolymerized with the unsaturated monomer having an epoxy group mentioned above include olefins such as ethylene, propylene, butene-1, decene-11-octacene-11-styrene, etc. Vinyl esters containing 2 to 6 carbon atoms in the saturated carboxylic acid component such as vinyl acetate, vinyl propionate, vinyl benzoate, etc. Alkyl esters of acrylic acid and methacrylic acid (alkyl group has 1 to 18 carbon atoms): Maleic anhydride: Saturated alcohol component Mono- and di-esters of maleic acid containing 1 to 18 carbon atoms: Acrylonitrile: Vinyl ethers: and acrylamide-based compounds, etc., of which two or more types are included. They can also be used in combination. Among the above, ethylene, vinyl acetate, acrylic esters, methacrylic esters, styrene, α-methylstyrene, and acrylonitrile are preferred, and ethylene is particularly preferred. If the amount is small, diene monomers such as butadiene and hexadiene, carbon monoxide, etc. may be copolymerized.

Preferred examples of the epoxy group-containing copolymer in the present invention include styrene/grindyl methacrylate copolymer,
Styrene/acrylonitrile/grindyl methacrylate copolymer, styrene/methyl methacrylate/butyl acrylate/glycidyl methacrylate copolymer, styrene/
Methyl methacrylate/glycidyl methacrylate copolymer, methyl methacrylate/glycidyl methacrylate copolymer, methyl methacrylate/acrylonitrile/glycidyl methacrylate copolymer, ethylene/glycidyl methacrylate copolymer, ethylene/acetic acid Vinyl/glycidyl methacrylate copolymer, ethylene/carbon oxide/glycidyl methacrylate copolymer, ethylene/glycidyl acrylate copolymer, ethylene/glycidyl acrylate/vinyl acetate copolymer, ethylene/allyl glycidyl ether copolymer Examples include polymers and butyl acrylate/glycidyl acrylate copolymers, and two or more of these can also be used in combination. Among the above, monoethylene/glycidyl methacrylate copolymer is particularly preferred.

Melt flow rate of the epoxy group-containing copolymer) (M
FR) is preferably in the range of 0.1-100, more preferably in the range of 0.5-30, since the effect of improving impact resistance tends to decrease if it is too large or too small. . Here IVIFR is ASTM D-1238 (
(measured at 190℃), the unit is 1
It is 710 minutes.

The amount of the epoxy group-containing copolymer added in the present invention is 1 to 80 parts by weight, preferably 2 to 50 parts by weight, more preferably 3 to 30 parts by weight, based on 100 parts by weight of the aromatic polyester.
Parts by weight. If the amount added is less than 1 part by weight, the adhesion to the epoxy resin will not be sufficiently improved, and if it exceeds 80 parts by weight, the heat resistance will decrease, which is not preferable.

Furthermore, the rubbery graft polymer used in the present invention is selected from the group consisting of aromatic monovinyl compounds, vinyl cyanide compounds, and (meth)acrylic ester compounds for polybutadiene-based or polyacrylic ester-based graft bases. The glass transition temperature is preferably 120° C. or lower.

The polybutadiene-based graft base contains 50% by weight or more, preferably 60% by weight or more of butadiene units, and in addition to polybutadiene, it contains one or more copolymers of butadiene and styrene, acrylonitrile, methyl methacrylate, methyl acrylate, etc. For example, butadiene/
(styrene copolymer, butadiene/acrylonitrile copolymer, etc.).

The vinyl monomer grafted onto the polybutadiene kraft base is one or more selected from aromatic monovinyl compounds, vinyl cyanide compounds, and (meth)acrylic acid ester compounds.

Examples of using two or more vinyl monomers include at least one (meth)acrylic acid ester and/or a mixture of acrylonitrile/styrene in a weight ratio of 10/90 to 35/65, preferably 20 /80~35
/65 can be mentioned.

The preferred (co)polymerized amount of vinyl monomer is 10 to 40% by weight, based on the grafted product.

In order to effectively improve the impact resistance of aromatic polyester, the grafting ratio of the polybutadiene-based rubbery graft polymer is 15 to 15% as measured in an acetone solvent.
It is preferably 150%, particularly 20 to 100%.

As a polyacrylic ester based craft base,
Examples thereof include acrylic ester polymers containing or not containing a diene rubber core, and homopathic bodies, and the acrylic ester is preferably 40% by weight or more, more preferably 6% by weight.
It contains 0% by weight or more. The acrylic ester is preferably an ester of acrylic acid and a monohydric alcohol having 1 to 8 carbon atoms, and specific examples include esters such as methyl, ethyl, propyl, hexyl, 2-ethylhexyl, and octyl.

The graft base may be co-bonded with a crosslinkable monomer, and such a crosslinkable monomer has 3 to 8 carbon atoms.
of unsaturated monocarboxylic acid with 2 to 4 ice groups and 2 to
Esters of saturated polyols containing 20 carbon atoms (e.g. ethylene dimethacrylate, ethylene diacrylate, butylene dimethacrylate, butylene diacrylate, trimethylolpropane trimethacrylate, etc.), unsaturated carboxylic acids containing 3 to 8 carbon atoms; Number of carbons is 3
Esters of ~12 unsaturated monohydric alcohols (e.g. allylbutacrylate, allyl acrylate, diallyl maleate, etc.), heterocyclic compounds with multiple unsaturated groups (
Examples include triallyl anurate, triallyl isocyanurate, tris-acryloyl-S-)IJ azine, etc.), polyfunctional vinyl compounds (such as di- and trivinylbenzene), +lylyl phosphate, diallyl phthalate, etc. , allyl methacrylate, ethylene dimethacrylate, diallyl phthalate,
Triallylisocyanurate, triallyl/amelate, triacryloylhexahydro-3-)lyazine and triallylbenzene are preferred. The crosslinkable monomer 1 is 0.02 to 5% by weight, especially 0.0% by weight, based on the graft base.
5 to 2% by weight is preferred. Furthermore, the amount of the trifunctional or higher functional crosslinking monomer is preferably 1% by weight or less based on the graft base.

The vinyl monomer to be grafted onto the polyacrylate kraft base is one or more selected from aromatic vinyl compounds, vinyl cyanide compounds, and (meth)acrylate compounds, preferably α-methyl. Styrene, styrene, acrylonitrile, methyl methacrylate, and mixtures thereof.

Among these, a mixture of styrene/acrylonitrile in a weight ratio of 90/10 to 50,150 is particularly preferred.

Examples of the above-mentioned rubbery graft copolymers include "acryloid" (manufactured by Rohm & No. (manufactured by), (・BTA”
, ")LIA" (manufactured by Kenbetsu Kagaku Co., Ltd.) and other commercially available products can also be used.

In the present invention, the addition t of the rubber-like graft polymer (Q) is 1 to 80 parts by weight, preferably 2 to 5031 parts by weight, more preferably 3 parts by weight, based on 100 parts by weight of the aromatic polyester.
~30 Jubon section. If the amount added is less than 1 part by weight, the impact resistance will be insufficiently improved, and if it exceeds 80 parts by weight, the heat resistance of the aromatic polyester will decrease, which is not preferable.

The use of fibrous and/or particulate reinforcing agents in the composition of the present invention is a preferred method for improving rigidity. Among these, fibrous reinforcing agents include inorganic fibers such as glass fibers, glass fibers, alumina fibers, silicon carbide fibers, ceramic fibers, asbestos A fibers, gypsum fibers, metal fibers (such as stainless steel fibers), and carbon fibers. Examples include. Particulate reinforcing agents include wollastenite, sericite, kaolin, mica, clay, bentonite, asbestos, talc, silicates such as alumina silicate, alumina, silicon oxide,
Metal oxides such as magnesium oxide, zirconium oxide, and titanium oxide, carbonates such as calcium carbonate, nesicum carbonate, and dolomite, sulfates such as calcium sulfate and barium sulfate, glass peas, boron nitride, silicon carbide, and sialon. These may be hollow (eg, hollow glass fibers, glass microballoons, 7 lath balloons, carbon balloons, etc.). Among these, glass fibers are preferred, and examples include chopped strand type glass fibers with a diameter of 5 to 15 μm for ordinary reinforced resins. The glass fibers are preferably treated with a silane coupling agent such as epoxy silane or aminosilane, and more preferably are surface treated with an epoxy resin or the like.

In the present invention, the amount of reinforcing agent used is preferably 100 parts by weight or less, particularly 70 parts by weight or less, per 100 parts by weight of the aromatic polyester.

By further adding an evoquin compound and/or a carbodiimide compound to the composition of the present invention, it is possible to further improve the impact resistance upon repeated heating and cooling. Such an epoxidized compound is a compound having at least one epoxy group in the molecule,
For example, bisphenol-type epoxy compounds obtained by reacting bisphenol and shrimp chloride in various proportions, glycidyl ethers obtained from monophenol and epichlorohydrin, novolac-type epoxy compounds obtained from novolak resin and epichlorohydrin, monocarbo/acid or polycarboxylic acid. Glycidyl ester obtained from acid and epichlorohydrin? alicyclic compound-type epoxy compounds obtained from alicyclic compounds (for example, cyclopentadiene), glycidyl ethers obtained from aliphatic compounds having an alcoholic hydroxyl group (e.g., butanediol, glycerin, etc.) and epichlorohydrin. , glycidyl ether esters obtained from hydroxycarboxylic acid and epichlorohydrin, epoxidized polybutadiene, heterocyclic compounds substituted with epoxy groups (for example, tris-epoxygloby-isocyanurate, etc.), and these are used in combination of 21 or more. You can also do that. Among these epoxy compounds, bisphenol A type epoxy compounds qV) (where n is a number from O to 20) and glycidyl ester compounds R' +C0CH-2C85Hz)mα) (wherein R ' is a hydrocarbon group having 6 to 40 carbon atoms,
m is an integer of 1 to 3). Preferred specific examples of glycidyl ester compounds include diglycidyl phthalate, diglycidyl terephthalate, diglycidyl isophthalate, diglycidyl hexahydrophthalate, diglycidyl tetrahydrophthalate, diglycidyl octadecanedicarboxylate,
These include diglycidyl dimerate, glycidyl p-tert-butylbenzoate, glycidyl benzoate, and Karshera E'' (trade name, manufactured by Yuka Shell (Aji)).

In addition, carbodiimide compounds are (-N=C=N
-) is a compound having a carbodiimide group, specifically diisopropylcarbodiimide, dicyclohexylcarbodiimide, di0-)lylcarbodiimide,
Diphenylcarbodiimide, dioctyldecylcarbodiimide, di-2,6-dimethylphenylcarbodiimide, N-t')yl-N'-cyclohexylcarbodiimide, N-)lyl-N'-phenylcarbodiimide, di-P-)lylcarbonimide, di-P-chlor phenylcarbodiimide, di-P-methkin phenylcarbodiimide, P-phenylene-bis-synchrohexylcarbodiimide, hexamethylene-bis-dicyclohexylcarbodiimide, ethylene-bis-dicyclohexylcarbodiimide, ethylene-bis-diphenylcarbonimide, etc. Mono- or dicarbodiimide compounds and poly(A
, 4'-diphenylmethanecarbodiimide), poly(
3,3'-dimethyl-4,4'-biphenylmethanecarbodiimide), poly(tricarbosiimide), poly(P-phenylenecarbodiimide), poly
(m-phenylenecarbodiimide), poly(1,6-
heki, sametile 7 carposiimide), poly (A, 4'
-methine/biscyclohexylcarbodiimide),
(1,3 and 4-cyclohekylenecarbodiimide), poly(1,3-diisopropylphenylenecarbodiimide), poly(l-methyl-3,5-diisopropylphenylenecarbodiimide) and poly(triisopropylphenylenecarbodiimide) Polycarbodiimide compounds such as carbodiimide) can be used, and two or more of these can be used in combination. Among these, dicyclohexylcarbodiimide, di-2,6-dimethylphenylcarbodiimide, poly(A,4'-diphenylmethanecarbodiimide), poly(tolylcarbodiimide)
, poly (phenylene carbodiimide) and poly (
Triisopropylphenylenecarbodiimide) is preferably used.

The amount of these epoxy compounds and/or carbodiimide compounds added is preferably 0.01 to 10 parts by weight, particularly 0.05 to 3 parts by weight, per 100 parts by weight of the aromatic polyester.

In contrast, the composition of the present invention may contain antioxidants and heat stabilizers (e.g., evahindered phenol, hydroquinone, thioether, phosphites, substitutes thereof, and combinations thereof) within a range that does not impair the object of the present invention. ),
UV absorbers 111 (e.g. various resorcinols, salicylates, benzotriazoles, benzophenones, etc.),
Lubricants and mold release agents (e.g. stearic acid and its salts,
colorants including dyes and pigments (e.g. cadmium sulfide, phthalocyanine, carbon black, etc.); flame release agents (e.g. decabromodiphenyl ether, brominated polycarbonates, etc.); , melamine or cyanuric acid, phosphorus, etc.), flame retardant aids (e.g., antimony oxide, etc.), antistatic agents (e.g., sodium dodecylbenzenesulfonate, polyalkylene glycol, etc.), plasticizers (e.g., triphenyl phosphate, etc.) phosphate esters, phthalate esters, benzoate esters, etc.),
One or more conventional additives such as crystallization promoters can be added. In addition, other thermoplastic resins (e.g. polyethylene, polypropylene, polystyrene, ABS resin, acrylic resin, fluororesin, polyamide, polyacetal,
Ethylene and 3 to I carbon atoms such as polycarbonate, polysulfone, polyester elastomer, ethylene/propylene copolymer, ethylene/butene-I copolymer, etc.
A copolymer consisting of an α-olefin of O, an ethylene/propylene/non-conjugated diene copolymer, a hydrogenated styrene/butadiene block copolymer, etc.) may be added in an amount of −1 or more.

Although the method for producing the composition of the present invention is not particularly limited, it is preferable that the aromatic polyester, the epoxy group-containing copolymer, the rubbery graft copolymer, and other additives as necessary be triblended, and then processed using a screw extruder. An example of this method is to melt and mix the aromatic polyester at a temperature higher than the melting point of the aromatic polyester.

When obtaining a molded article from the resin composition of the present invention, injection molding,
Conventional methods such as extrusion molding and blow molding can be applied, and the obtained molded product exhibits good performance.

<Examples> The present invention will be explained in detail below using examples. Note that "parts" in the examples indicate parts by weight.

Examples 1 to io, Comparative Example 1-11 Glass fiber (chopped strand type,
After tri-blending the amounts listed in Table 1 of the following epoxy group-containing copolymers and rubber-like graft copolymers (epoxy resin surface treated products), melt-mix pellets using a 40flφ screen extruder set at 250°C. It became. The resulting pellet was molded using a screw in-line injection molding machine with a 5 oz injection capacity set at a cylinder temperature of 250°C and a mold temperature of 80°C to obtain ASTiVi 1.
No. 1 dumbbell and 1/2' wide Izotz impact test specimens were obtained. Using these test pieces, a tensile test was conducted in accordance with ASTM D638, and an impact test was conducted in accordance with ASTM D256 to determine the tensile strength and Izot impact strength. The results are shown in Table 1.

In addition, the above Izot impact test piece was treated with epoxy resin (epoxy-Araldite CY2O5, 100 parts by weight, curing agent hardener f (Y2O2, 100 parts by weight, accelerator DY
Adhesion was made using a mixture of O61 and 1 part by weight (all manufactured by Ciba Geigy). However, the epoxy resin is
It was applied between test pieces of the same size stacked one on top of the other at a length of off, and was cured by heating at 130° C. for 5 hours. A compression shear test was performed on this bonded test piece to determine the shear adhesive strength. Further, after 200 cycles of a heat cycle test in which one cycle was 160 DEG C. for 2 hours/-40 DEG C. for 2 hours, the tensile strength, Izot impact strength and shear adhesive strength were determined. These results are shown in Table 1.

(Epoxy group-containing copolymer) A: ET/GMA (90/10 weight ratio) copolymer, MFR=7 (190°C, 2710 minutes).

B: ET/GMA/VA (85/1015 M
m ratio) copolymer, MFR=5 (190°C, 1710
minutes).

C: ST/GMA (90/10 weight ratio) copolymer,
MFR=2.0 (125°C, 1710 minutes).

D: ST/BA/GMA (60/20/20 weight ratio) copolymer, MFR=4.5 (125°C, 171
0 minutes).

E: ST/AN/MMA/GMA (55/15/
15/15 weight ratio) copolymer, IVIFR=9.5
(125°C, 1710 minutes).

(Rubber-like graft copolymer) F: "BTA" INX, manufactured by Kenbetsu Kagaku Co., Ltd.

G: "HIA"' 15, manufactured by Kenbetsu Kagaku Co., Ltd.

H: Pakane Ace==FM, manufactured by Kanebuchi Chemical Co., Ltd.

I: ``Acryloite'' KM330, manufactured by Rohm Ken & Haas.

(The low polymer) J: ST/AN (70/30 weight ratio) copolymer.

(Abbreviations for the above polymers) ET: ethylene, GIVIA: glycidyl methacrylate, VA: acetic acid, ST: styrene, BA
Butyl diacrylate, MMA: Methyl methacrylate,
AN: Acrylonitrile As is clear from Table 1, the composition of the present invention, which contains both a specific epoxy group-containing copolymer and a rubbery graft copolymer to an aromatic polyester, has good adhesive strength with Evoquin resin. It also has excellent mechanical properties such as adhesive strength, tensile strength, and impact resistance even after repeated heating and cooling.

Examples 11 to 17, Comparative Examples 12 to 16 Same as Examples 2 and 6 except that the following epoxy compounds and/or carbodiimide compounds were added to Examples 2 and 6? Then, melt mixing, molding, and physical property evaluation were performed. These results are shown in Table 2.

(Epoxy compound) K: Hexahydrophthalic acid diglycidyl ester L: 0-phenylphenol lvl: "Epicote"' 819 (, trade name,
(manufactured by Yuka NEL Co., Ltd.) N: BolJ (triisoglobilphenylenecarbodiimide) As is clear from the results in Table 2, an Evoquin compound and/or a carbodiimide compound was further added to the composition of the present invention. It can be seen that by doing so, the adhesive strength and mechanical properties after repeated heating and cooling are further improved.

<Effects of the Invention> Molded products made from the polyester resin composition of the present invention have good adhesion to epoxy resin, and have excellent mechanical properties and impact resistance when repeatedly heated and cooled. It is useful as a material for electrical/electronic equipment, automobiles, etc.

Patent application Daitoshi Co., Ltd.

Claims (1)

[Claims] (A) (B) based on 100 parts by weight of aromatic polyester
Epoxy group-containing copolymer 1 composed of an epoxy group-containing unsaturated monomer and an epoxy group-free unsaturated monomer
~80 parts by weight and (C) rubbery graft polymer 1-8
A polyester resin composition containing 0 parts by weight.