JPS61235456A - Polyester resin composition - Google Patents

Abstract

PURPOSE:To improve moldability in a low-temperature mold and to increase impact resistance in a low-temperature regin, by blending an inorg. nucleating agent, a modified polyolefin, a copolyolefin and an ester plasticizer with polyethylene terephthalate contg. an arom. polycarbonate added thereto. CONSTITUTION:0.05-10pts.wt. at least one member (a) selected from among inorg. nucleating agents having an average particle size of 50mu or below and high-molecular compds. or org. compds. contg. carboxyl groups in the form of a metal salt, 3-30pts.wt. modified polyolefin (b) obtd. by adding 0.001-10mol% of at least one compd. selected from alicyclic carboxylic acids contg. a cis double bond in its ring and functional derivatives thereof to a polyolefin, 1-30pts.wt. copolymer (c) composed of 80-99wt% alpha-olefin, 1-20wt% glycidyl (meth)acrylate and 0-19wt% vinyl acetate, 0.3-10pts.wt. ester plasticizer (d) and 0-150pts.wt. reinforcing fiber (e) are blended with a component (f) composed of 60-90pts.wt. polyester and 10-40pts.wt. arom. polycarbonate.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a polyester resin composition that has good moldability and provides molded articles with excellent impact strength and heat resistance. More specifically, the product has a high crystallization rate, exhibits excellent mold releasability even at a mold temperature of about 120°C or less during injection molding, and has excellent impact strength and high heat distortion temperature. The present invention relates to a polyester resin composition.

(Prior Art) Polyethylene terephthalate has excellent mechanical properties, electrical properties, heat resistance, chemical resistance, etc., and is used in the form of 1 m fibers and films in many industrial products.

In this way, when used as fibers or films, 2
Normally, stretched products are used, but if the product is to be used as an injection molded product in plastic applications, for example, the stretching process described above has not been applied.
It is known that various problems occur in molding and physical properties. In other words, since the crystallization rate is low at low temperatures9, the crystallization rate is insufficient at mold temperatures of about 120°C or lower, which are normally used when injection molding other plastics, so the resulting molded product has There is a difference in the degree of crystallinity inside the mold, which results in uneven mechanical properties, dimensional stability, and shape stability, making it extremely difficult to obtain a molded product that can withstand practical use.

As a conventional method to solve such problems.

Many methods have been proposed, such as using a high-temperature mold, adding a crystal nucleating agent or crystallization accelerator, and blending an ethylene terephthalate copolymer with excellent low-temperature crystallinity, all of which have proven to be quite effective. It recognized. Polyethylene terephthalate (hereinafter P
BT) or compositions, especially those blended with fibrous reinforcing materials such as glass fibers, exhibit excellent mechanical properties and high heat distortion temperatures, and have established themselves as engineering plastics to this day. However, one drawback of reinforced PET-based compositions containing polyethylene terephthalate-based compositions or glass fibers is that they have low impact strength.
In other words, there is a problem of poor toughness, and there is currently a strong desire to improve this problem.

On the other hand, aromatic polycarbonates, such as bisphenol^-based polycarbonates, have good heat distortion temperature and molding dimensional stability, but have disadvantages such as poor solvent resistance 9 surface hardness, high melt viscosity, and poor moldability. . Such P
In order to solve the drawbacks of ET-based compositions or reinforced PET-based compositions and aromatic polycarbonates, 9.If both are uniformly mixed in a molten state, dimensional stability and chemical resistance can be achieved.

It has been found that moldability is improved.

Such compositions have the disadvantage of insufficient impact resistance, which limits their use in applications requiring impact resistance. And how to solve the above problems.

That is, various proposals have been made as methods for improving impact strength.

For example, Japanese Patent Publication No. 55-9435, Japanese Patent Publication No. 59-10
Publication No. 0154 proposes that impact strength can be improved by blending a butadiene-based graft copolymer with an aromatic polyester and an aromatic polycarbonate.

Furthermore, in Japanese Patent Application No. 57-228823, the present applicant added modified polyolefin or modified olefin-based elastomer, which is component (0) of the present invention, to thermoplastic polyester.
When a specific amount of component (c) glycidyl (meth)acrylate copolymerized polyolefin is blended.

It was proposed that impact resistance strength would be significantly improved by the combined effect of the blue component. It has been found that although this composition improves the impact strength near room temperature, the impact strength at low temperatures of -10°C to -30°C does not improve as much as expected.

(Problems to be Solved by the Invention) As a result of intensive research to solve the various problems mentioned above, we found that component (C), that is, a polyolefin copolymerized with glycidyl (meth)acrylate, and component (D), that is, a specific In the composition of Japanese Patent Application No. 57-228823 which combines a modified polyolefin or an olefin elastomer, a part of PET is replaced with an aromatic polycarbonate, and an ester plasticizer (component) is further added.
The generation of gel during the production of beleft by heating and kneading is suppressed and operational stability is improved, and furthermore, when components (a) and (b) are added, that is, an ester plasticizer, PE
The crystallization rate of T is increased, and a molded product with excellent surface gloss can be obtained even when molded in a low temperature mold of 120'C or less.

and the mold releasability is significantly improved, and the low temperature range 9 of the obtained polyester resin composition, e.g. -10°C to -30°C.
The present invention was achieved by discovering that the impact strength of the steel sheet can be further improved.

(Means for solving the problems) That is, the present invention provides polyethylene terephragm
For 60 to 90 parts by weight of polyester having 0 mol% or more of ethylene terephthalate repeating units and 10 to 40 parts by weight of aromatic polycarbonate, (a) average particle size of 50
0.05 to 10 parts by weight of at least one of an inorganic crystal nucleating agent of μ or less, an organic compound having a metal salt of a carboxyl group, and a polymer compound having a metal salt of a carboxyl group to the trJ1 polyolefin or olefin elastomer. Modified polyolefin or modified olefin elastomer 3 to 30 to which 0.001 to 10 mol% of at least one compound selected from the group consisting of alicyclic carboxylic acids having a cis-type double bond in the ring or functional derivatives thereof is added parts by weight, (c) 1 to 30 parts by weight of a copolymer consisting of 80 to 99% by weight of α-olefin, 1 to 20% by weight of glycidyl methacrylate or glycidyl acrylate, and 0 to 19% by weight of vinyl acetate, and (3) ester plasticizer. 0.3 to 10 parts by weight, (Ho>vh fibrous reinforcement 0 to
This relates to a polyester resin composition containing 150 parts by weight.

(Function) The PET used in the present invention is obtained from terephthalic acid or an ester of terephthalic acid and ethylene glycol by ordinary melt polymerization.

Or it has been subjected to solid phase polymerization treatment.

And what is a polyester having at least 80 mol% or more of ethylene terephthalate repeating units?

It means a copolymer consisting of 80 mol% or more of ethylene terephthalate repeating units and other repeating units, that is, other copolymerization components, and as the above other copolymerization components, various acid components and glycol components are used. can do. For example, acid components include isophthalic acid, naphthalene dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenylmethane dicarboxylic acid, diphenylsulfone dicarboxylic acid,
P-(2-hydroxyethoxy)benzoic acid, 5-sodium sulfoisophthalic acid, adipic acid, azelaic acid,
Sebacic acid, dodeca-1,12-dicarboxylic acid, tetradecane-1,14-dicarboxylic acid, hexadecane-1,
Examples include 16-dicarboxylic acid, octadecane-1118-dicarboxylic acid, 6-nitylhexadecane-1,16-dicarboxylic acid, and the like.

In addition, glycol components include propylene glycol,
Examples include polyalkylene glycols such as diethylene glycol, butylene glycol, pentyl glycol, neopentyl glycol, hexamethylene glycol, polyethylene glycol, and polytetramethylene glycol.

The polycarbonate used in the present invention is produced by a phosgene method or a transesterification method using bisphenol as a main raw material. As raw material bisphenol, 2.
2-bis(4-hydroxyphenyl)-propane (hereinafter abbreviated as bisphenol A), further partially or completely converted into bisphenol by other 4.4°-dihydroxydiphenylalkane or 4.4°-dihydroxydiphenylsulfone, 4 Examples include 4'-dihydroxydiphenyl ether. The polycarbonate preferably has an average molecular weight of 10,000 to 100,000.

The inorganic compound used as component (a) of the present invention is as follows.

The effect as a crystal nucleating agent varies depending on the particle size, and the effect decreases when the average particle size exceeds about 50 μm, so inorganic compounds with an average particle size of 50 μm or less are generally useful.

Specific examples of inorganic compounds with an average particle size of 50μ or less used in the present invention include carbon blank, silica, calcium carbonate, synthetic silicic acid and silicates, zinc white, hallosite clay, kaolin, basic carbonate, etc. Magnesium, mica.

Examples include talc, quartz powder, diatomaceous earth, dolomite powder, titanium oxide, zinc oxide, antimony oxide, barium sulfate, calcium sulfate, alumina, calcium silicate, etc., and one or more of these inorganic compounds are used. Although you can.

Among them, mica, kaolin, talc, and silica are useful in the present invention.

Further, as the organic compound having a metal salt of a carboxyl group used in the present invention, any compound having a metal salt of a carboxyl group can be used, but usually has about 7 to 7 carbon atoms. 30 higher fatty acids, metal salts of aromatic acids are used, such as heptanoic acid,
pelargonic acid.

Lauric acid, myristic acid, valmitic acid, stearic acid, behenic acid, cerotic acid, montanic acid.

Metal salts of higher fatty acids such as melisic acid, benzoic acid.

Terephthalic acid, terephthalic acid monomethyl ester.

Specific examples include metal salts of aromatic acids such as isophthalic acid and monomethyl ester of isophthalic acid.

Further, the polymer compound having a metal salt of a carboxyl group is not particularly limited as long as it has a metal salt of a carboxyl group at the terminal or side chain of the polymer, but for example, a carboxyl group obtained by oxidation of polyethylene is used. Containing polyethylene, carboxyl group-containing polypropylene obtained by oxidizing polypropylene, copolymers of olefins such as ethylene, propylene, butene-1, and (meth)acrylic acid, copolymers of olefins and maleic anhydride, styrene and ( Specific examples include metal salts such as copolymers of meth)acrylic acid and copolymers of styrene and maleic anhydride.9 Usually, copolymers of olefin and (meth)acrylic acid or styrene and (meth)acrylic acid are used. Polymeric metal salts are used. As metals that form salts with carboxyl groups, alkaline earth metals, alkali metals, etc. are usually used, and alkali metals are excellent in their effectiveness as crystal nucleating agents, with sodium and potassium being particularly useful.

In the present invention, the polyolefin or olefin elastomer used as a starting material in producing the modified polyolefin or modified olefin elastomer which is the component (b) is 1. For example, olefins such as polyethylene, polypropylene, polybutene-1, polypentene-1, etc. homopolymers or ethylene-propylene copolymers, ethylene-butene-1 copolymers, propylene-butene-1 copolymers, and ethylene-vinyl acetate copolymers.

Propylene-vinyl acetate copolymer, ethylene-butadiene copolymer, ethylene-isoprene copolymer 9ethylene-chloroprene copolymer, 7” rohylene-butadiene copolymer, ethylene-propylene-butadiene copolymer, etc. Examples include copolymers with different types of olefins or diolefins, and the type of copolymer is a random copolymer.

Any of block copolymers, graft copolymers, and alternating copolymers may be used.

and especially ethylene-propylene copolymers, ethylene-
butene-1 copolymer, ethylene-vinyl acetate copolymer,
Ethylene-propylene-butadiene copolymers, ethylene-propylene-isoprene copolymers, ethylene-propylene-chlorobrene copolymers, etc. are preferred, and two or more types of polyolefins or olefin elastomers can also be used as a mixture.

The alicyclic carboxylic acid having a cis-type double bond in the ring as used in the present invention includes 0, for example, cis-4-cyclohexene-1
, 2-dicarboxylic acid, endo-bicyclo-(2,2,1
) -5-hebutene-2,3-dicarboxylic acid, methyl-
Endo-cis-bicyclo-[2゜2.1)-5-hebutene-2,3-dicarboxylic acid, endo-bicyclo-(2,
2,1) -1,2,3,4,7,7-hexachloro-
Examples include 2-hebutene-5,6-dicarboxylic acid, and functional derivatives thereof include acid anhydrides, esters, acid amides, acid halides, and the like.

And especially preferably endo-bicyclo-[2゜2.1
)-5-hebutene-2,3-dicarboxylic acid or its acid anhydride. Note that the functional derivative does not necessarily need to be converted into a functional derivative before being added to the polyolefin or olefin elastomer.

For example, it can be converted during the modification process of polyolefin or olefin-based elastomer or as a thermoplastic polyester composition.

The modified polyolefin or modified olefin elastomer of the present invention is at least one compound selected from the group consisting of alicyclic carboxylic acids or functional derivatives thereof having a cis-type double bond in the ring in the polyolefin or olefin elastomer. It means a modified polyolefin or a modified olefin elastomer obtained by adding , or a mixture thereof with an unmodified polyolefin or an unmodified olefin elastomer. The modified polyolefin or modified olefin elastomer can be produced by various methods, but it is preferable to produce radicals by combining the above-mentioned polyolefin or olefin-based elastomer and the above-mentioned alicyclic carboxylic acid or functional derivative having a cis double bond in the ring. Agent 1 For example, an organic peroxide such as di-tert-butyl peroxide, dicumyl peroxide, or benzoyl peroxide is added and melted, or the polyolefin or olefin elastomer and the carboxylic acid or its functional derivative are mixed in water. The method is carried out by dispersing the mixture in water and heating it in the presence of the above-mentioned radical generator or water-soluble peroxide.

Here, the addition ratio of the carboxylic acid or its functional derivative to be added to the polyolefin or olefin elastomer varies depending on the type of polyolefin or olefin elastomer, their mixing ratio, and the type of the carboxylic acid or its functional derivative. 0.001 to 10 of the carboxylic acid or its functional derivative for polyolefin or olefin elastomer
Although mol% addition is used, preferably 0.0
1 to 5.0 mol%, more preferably 0.05 to 3.0
A mole % addition is used.

The amount of the carboxylic acid or functional derivative added is 0.001
If it is less than 10% by mole, the synergistic effect on improving impact strength when used in combination with component (c) will not be sufficient, and if it is added in excess of 10% by mole, the polyolefin will be Otherwise, side reactions such as lowering of the molecular weight of the olefin elastomer and gelation occur, which is undesirable.

α-olefin-glycidyl (meth)acrylate copolymer or α used as component (c) in the present invention
- The content of glycidyl (meth)acrylate in the olefin-glycidyl (meth)acrylate-vinyl acetate copolymer is 1 to 20% by weight, preferably 1 to 10% by weight.
If the amount is less than 1% by weight, there is no sufficient effect in improving the impact resistance when used in combination with the modified polyolefin or modified olefin elastomer, and if it is more than 20% by weight, the resin composition of the present invention This is not preferable because side reactions such as gelation occur during the production. The α-olefin component in these copolymers is ethylene.

Propylene, butene-1, etc. The vinyl acetate component in the terpolymer can be contained in an amount of 0.1-19% by weight. If the vinyl acetate content exceeds 19% by weight, it is undesirable because the thermal stability of the resulting resin composition will decrease.2) Various ester plasticizers can be used as the component. However, among these, compounds represented by the following general formulas (1), (II), and (III) are particularly useful.

RI: Alkylene group Rx + Rs: A group selected from an alkyl group, a benzyl group, and an aromatic substituted benzyl group.

R1 and R are the same or different groups It is.

m, n: An integer of 1 or more (...) X: Direct bond, alkylene group, -SO-, -S-, -
O- or -〇- R4, Rs: A group selected from an alkyl group, a benzyl group, a phenyl group, or a derivative thereof, and R4 and R8 are the same or different groups.

R@, R? : Hydrogen, an alkyl group, or a halogen, and R@ and Rf are the same or different groups.

m, n: an integer of 1 or more R@+ b: water 1i-+alkyl group, phenyl group.

Benzyl group or these derivatives A group selected from conductors, Ra.

b is the same or different group Ru.

Rho: A group selected from a phenyl group, a benzyl group, and a derivative of Shikakore et al.

R1: A group consisting of hydrogen, an alkyl group or a group defined by Rm.

n: An integer of 4 or more.

In the ester plasticizer represented by the general formula (I), RI represents an alkylene group, usually having 1 to 20 carbon atoms.
It is preferable to use a linear or branched alkyl group having molecular symmetry, R1°R3 is methyl,
Ethyl, propyl, butyl.

Specific examples include pentyl, hexyl, heptyl, octyl, and benzyl. 1. As for n, as 1lln increases, the effect as a crystallization accelerator tends to increase, but conversely, the compatibility with PET decreases and the heat resistance decreases, so 9 Usually, m and n are 1~
Approximately 20. Preferably it is 1 to about 10.

In the general formula (ff), X is usually an alkylene group such as methylene, ethylene, propylene, or 10-
is useful, and as R4 and R8, alkyl groups having 5 or more carbon atoms, benzyl groups, and phenyl groups are usually effective, and m and n are 1.
~10 is desirable.

In the general formula (III), hydrogen and alkyl groups are useful as Ra+R., and benzyl groups are useful as R+o and Ru. If n is 3 or less, it will easily volatilize during heating and have little effect as a crystallization promoter, so n is 4.
The above are effective, such as adipic acid, azelaic acid, decane-1,10-dicarboxylic acid, octadecane-1,18
-Dibenzyl esters of dicarboxylic acids are useful.

Specific examples of the fibrous reinforcing material used in the present invention include glass fibers, carbon fibers, aromatic polyamide fibers, silicon carbide fibers, titanate fibers, etc.9 Usually, glass fibers are often used. Ru. There are no particular restrictions on the diameter and length of the various fibers, but if the fiber length is too long, it may be difficult to uniformly mix and disperse the fibers with the polyester and other compounding agents, that is, the (a) component or elongation component. On the other hand, if the fiber length is too short, the effect as a reinforcing material will be insufficient.9 Usually, those with a fiber length of 0.1 to 10 mm are used, especially when the fibrous reinforcing material is glass fiber. In this case, the fiber length is 0
．． 1 to 7a+m is preferable, and more preferably 0.3 to 4cm.Furthermore, the fibrous reinforcing material may be treated with various compounds as necessary for the purpose of improving the interfacial adhesion with polyester and increasing the reinforcing effect. However, when using glass fiber as the fibrous reinforcement material, 1.
Various surface treatment agents such as vinyltriethoxysilane, γ-methacryloxypropylmethoxysilane, β-(
Silanes such as 3゜4-epoxycyclohexyl)-ethyltrimethoxysilane, T-glycidoxypropyltrimethoxysilane, γ-aminopropyltriethoxysilane, T-chloropropylmethoxysilane, and T-mercaptopropyltrimethoxysilane A treatment agent treated with a chromium-based treatment agent such as methacrylate chromium chloride is used.

Regarding the blending amount of each component of the present invention, polyester 10
10 to 70 parts by weight, preferably 15 to 60 parts by weight of aromatic polycarbonate per 0 parts by weight! It is i quantity part. The proportion of aromatic polycarbonate is 10! If the amount is less than 1 part, the improvement in heat distortion temperature will be so small that it will be of no practical value.

If the amount exceeds 70 parts by weight, the excellent properties of the polyester will be impaired, which is not preferable.

Next, regarding the amount of component (a), that is, the inorganic crystal nucleating agent and the metal salt of the carboxyl group, based on the sum of aromatic polycarbonate and polyester (100 parts fi),
If it is less than 0.05 parts by weight, it will not be effective as a crystal nucleating agent, and conversely, if it is added in more than 10 parts by weight, the effect as a crystal nucleating agent will not be better than if it is 1 oii part or less. On the contrary, it is not preferable because it may induce a decrease in impact resistance strength. Therefore, the amount of component (a) to be blended is 0.05 to 10 parts by weight, preferably 0.5 to 5 parts by weight. The amount of the component (b), that is, the modified polyolefin or modified olefin elastomer, is the sum of the aromatic polycarbonate and the polyester! ! If it is less than 3 parts by weight based on i part, the improvement in impact resistance strength due to the effect of the combination with component (c) will be small, and on the other hand, if it is blended in more than 30 parts by weight, the thermal properties of the composition will deteriorate. Unfavorable, therefore (/9 component blending amount is 3 to 30
Weight part.

Preferably 5 to 25 parts by weight, more preferably 5 to 20 parts by weight
Parts by weight. Regarding the blending amount of component (c), that is, the glycidyl (meth)acrylate copolymerized polyolefin, if it is less than 1 part by weight, the effect of improving impact strength will be small, and even if it is blended in an amount of more than 30 parts by weight, the impact strength will not improve. It is not preferable because it does not increase as the amount increases, but instead reaches a saturation value and promotes gelation during heating and crosstalk.

Therefore, the blending amount of component (c) is 1 to 30 parts by weight, preferably 3 to 20 parts by weight! ! ! Quantity parts, more preferably 3 to 10 parts
Parts by weight. The mixing ratio of component (B) and component (C) is 10:1 to 1:10. Preferably 10:1 to 1:2. Particularly preferably, a range of 5:1 to 1:1 is effective for improving the targeted impact strength. 2) Regarding the blending amount of the ester plasticizer component, 0.
If it is less than 3 parts by weight, the effect of promoting crystallization and improving the mold releasability will be small, and if it is more than 10 parts by weight, the heat resistance will decrease, which is not preferable. Department.

Preferably it is 1 to 7 parts by weight. Furthermore, in the present invention, the amount of fiber reinforcing material blended as necessary is 150! If the amount exceeds 100 parts by weight, it will be difficult to disperse and mix them evenly in the resin, so the amount is usually 100 parts by weight or less.

Furthermore, various inorganic or organic compounds such as antioxidants, ultraviolet absorbers 1 colorants, fillers, etc. may be added to the composition of the present invention, if necessary, within a range that does not significantly reduce the impact strength. be able to. The method for producing the composition of the present invention is not particularly limited, and may be produced in various forms,
For example, it can be molded into various molded products, sheets, fibrous materials, tubular materials, and the like.

(Example) Next, the present invention will be specifically described with reference to Examples and Comparative Examples.

Note that "parts" shown in Examples and Comparative Examples indicate "parts by weight."

Reference example 1 Melt index 2.0g / 10 minutes / 190°C,
Ethylene content 72. 1000 parts by weight of ethylene-propylene copolymer (hereinafter referred to as EPR), endo-bicyclo-(2,2,1)-5-heptene-2,3-dicarboxylic anhydride (hereinafter referred to as dicarboxylic anhydride) −
It is abbreviated as H. ) and 1 il part of di-tertiary-butyl peroxide were mixed at room temperature using a Henschel mixer. This mixture was fed to a single screw extruder, and
Extruded at 00℃, diameter 2m+11, length 31iIIIl
Cylindrical pellets of modified polyolefin were prepared.

Reference Examples 2 to 5 Ethylene-butene-1 copolymer (hereinafter abbreviated as E/B copolymer), polypropylene (hereinafter abbreviated as PP), polyethylene (hereinafter abbreviated as PP), having a melt index shown in Table 1 as polyolefin (hereinafter referred to as PE) or ethylene-vinyl acetate copolymer (hereinafter referred to as EVA), and then endo-bicyclo(2,2, 1
) -5-hebutene-2,3 anhydrous cicala 1! Modified polyolefin pellets to which alicyclic dicarboxylic anhydride was added in the proportions shown in Table 1 were obtained in the same manner as in Reference Example 1 using phosphoric acid (hereinafter abbreviated as dicarboxylic anhydride-H).

Table 1 Examples 1-5. Comparative Examples 1 to 3 "Niepiron S-2000" as an aromatic polycarbonate with an intrinsic viscosity (measured in phenol/tetrachloroethane-6/4, concentration 0.5%, temperature 20°C) of 0.68
(Product name: Mitsubishi Gas Chemical) and crystal nucleating agent.

Plasticizer, modified polyolefin 9 glycidyl methacrylate copolymer polyolefin (GM copolymer) was mixed in a predetermined amount as shown in Table 2, and this mixture was heated to a cylinder temperature of 260°C using a co-rotating twin screw extruder. , Pellets were produced by cross-wire extrusion at a screw speed of 20 rpm. After drying the pellet under reduced pressure, the cylinder temperature is 26
0℃, mold temperature 100℃.

1/8 inch x 1/2 inch x 2.5 with cooling time of 15 seconds
Inch specimens were molded and ASTM, D-638
The notched Izot impact strength was measured at room temperature and -20°C according to the method, and the surface gloss was further evaluated. The results are summarized in Table 2.

d: Dibenzyl ester of adipic acid 2% by weight) copolymer Surlyn 1555: Ethylene-acrylic acid copolymer sodium salt (manufactured by DuPont) Example 6. Comparative Example 4 In addition to the composition shown in Example 1, 0.5 part of talc and glass fiber (Asahi Fiberglass ■, 3 mm long tongue long tufted strand, product number N1429) were added in an amount of 30% by weight based on the total composition.
The ingredients were blended so that the ingredients were mixed and kneaded using a twin-screw extruder to create pellets (Example 6). Similarly, for comparison, pellets containing 30% by weight of glass fibers having the composition shown in Comparative Example 3 were prepared (Comparative Example 4).

Various test pieces were molded at a cylinder temperature of 260°C, a mold temperature of 100°C, and a cooling time of 10 seconds, and the notched isot impact strength (test piece thickness: 2178 inches) was determined according to ASTH.
and 18.56 Kg/cnlr1 weight JE
J degree (test piece thickness 2178 inches) was measured.

The results are shown in Table 3.

Table 3 (Effects of the Invention) As shown in Comparative Example 4, in the composition in which no modified polyolefin is blended, the Izot strength is significantly inferior. It can be seen that the composition of the present invention has excellent impact strength and heat distortion temperature due to the combination of modified polyolefin and surrounding copolymer.

Claims (7)

[Claims] (1) 60 to 90 parts by weight of polyethylene terephthalate or polyester having 80 mol% or more of ethylene terephthalate repeating units and 10 parts by weight of aromatic polycarbonate
to 40 parts by weight, at least one of (a) an inorganic crystal nucleating agent with an average particle size of 50 μ or less, an organic compound having a metal salt of a carboxyl group, and a polymer compound having a metal salt of a carboxyl group is added to 0. .05 to 10 parts by weight, (b)
Modified polyolefin or modified polyolefin or olefin elastomer with 0.001 to 10 mol% of at least one compound selected from the group consisting of alicyclic carboxylic acids having a cis-type double bond in the ring or functional derivatives thereof 3-30 parts by weight of olefin elastomer, (c) 80-99% by weight of α-olefin, 1-1 to glycidyl methacrylate or glycidyl acrylate
1 to 30 parts by weight of a copolymer consisting of 20% by weight and 0 to 19% by weight of vinyl acetate, (d) 0.3 parts by weight of an ester plasticizer
-10 parts by weight, and (e) 0 to 150 parts by weight of a fibrous reinforcing material. (2) The molding composition according to claim 1, wherein the aromatic polycarbonate is bisphenol A polycarbonate. (3) The ester plasticizer has the following general formula (I) or (II)
The polyester resin composition according to claim 1, which is an ester compound of at least one of (III). ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (I) R_1: Alkylene group R_2, R_3: Groups selected from alkyl groups, benzyl groups, and aromatic substituted benzyl groups, and R_2 and R_3 are the same or different groups. m, n: Integer greater than or equal to 1 ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ (II) X: Direct bond, alkylene group, -SO_2-, -S-,
-O- or ▲ Numerical formula, chemical formula, table, etc. ▼ R_4, R_5: A group selected from an alkyl group, a benzyl group, a phenyl group, or a derivative thereof. R_4 and R_8 are the same or different groups. R_6, R_7: hydrogen, alkyl group, or halogen, and R_6 and R_7 are the same or different groups. m, n: Integers of 1 or more ▲ Numerical formulas, chemical formulas, tables, etc. ▼ (III) R_8, R_9: Groups selected from hydrogen, alkyl groups, phenyl groups, benzyl groups, or derivatives thereof, and R_8 and R_9 are They are the same or different groups. R_1_0: A group selected from a phenyl group, a benzyl group, or a derivative thereof. R_1_1: A group consisting of hydrogen, an alkyl group, or a group defined by R_1_0. n: An integer of 4 or more. (4) The polyester resin composition according to claim 1, wherein at least one inorganic substance selected from the group of talc, mica, kaolin, and silica is used as the inorganic compound having an average particle size of 50 μm or less. . (5) The polyester resin composition according to claim 1, wherein the metal salt of the carboxyl group is a sodium salt or potassium salt of the carboxyl group. (6) The polyester resin composition according to claim 1, wherein the compound having a metal salt of a carboxyl group is a compound having about 7 to 30 carbon atoms. (7) The polymer compound having a carboxyl group is a copolymer of olefin and (meth)acrylic acid or a copolymer of styrene and (
Claim 1, which is a copolymer of meth)acrylic acid
The polyester resin composition described in .