JPS63304048A - Polymer composition and molded body thereof - Google Patents

Abstract

PURPOSE:To obtain a composition, homogeneously mixable and dispersible into the form of fine particles and providing molded bodies having excellent mechanical properties and heat distortion temperature, by blending a mixture of a polyamide with polyester with a grafted and modified polyolefin. CONSTITUTION:A composition consisting of (A) 100pts.wt. mixture of 5-95wt.% polyamide (preferably nylon 6, nylon 66, etc.) with 95-5wt.% thermoplastic polyester (preferably PETF or PBTF) and (B) 0.5-40pts.wt. grafted and modified polyolefin prepared by graft polymerizing an addition polymer having peroxide bonds in the molecular chain onto a modified polyolefin having functional groups in the molecular chain [e.g. poly(ethylene/acrylic acid-g-poly(butyl acrylate/styrene block copolymer)] and a molded body, obtained by molding the above-mentioned composition and containing the component (B) dispersed into the form of fine particles having <=2mum average particle diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a resin composition useful as a constituent material for various automobile parts, mechanical parts, electrical or electronic parts, and general miscellaneous goods, and a molded article thereof.

[Prior Art] Thermoplastic polyesters represented by polyethylene terephthalate and polybutylene terephthalate have excellent mechanical properties, particularly high rigidity and strength, and are widely used as excellent engineering plastics. On the other hand, polyamides such as polycaproamide and polyhexamethylene adipamide are used as important materials in the field of molded products, which have different uses than polyester, due to their excellent toughness, abrasion resistance, and chemical resistance.

Conventionally, attempts have been made to combine such polyesters and polyamides to utilize the excellent properties of each and to improve the problems of each. Publication No. 47-19101, Japanese Patent Publication No. 47-24465, Japanese Unexamined Patent Publication No. 48-56
No. 742, JP-A-49-114661, JP-A-56-34754, and JP-A-57-49657 each contain different blending compositions of polyester and polyamide depending on the purpose, and additives. A technique has been disclosed in which the problems encountered when polyester and polyamide are combined are improved by using a fibrous reinforcing material or an inorganic filler in combination.

[Problems to be solved by the invention] When mixing polyester and polyamide, usually,
Although the melt-mixing method is applied, since polyester and polyamide have poor compatibility, it is not possible to obtain a uniform kneaded product, and as a result, the mechanical properties of the molded product obtained from the mixed product are low. There is a problem in that the mechanical properties vary widely from mold to mold. Among these problems, in particular, the tensile elongation of the molded product is low, the heat distortion temperature varies greatly depending on the molded product, and furthermore, the molded product may cause layer separation during use. The application of constituent materials that combine these to various fields has been hindered.

The present invention solves these problems, and allows constituent components including polyester and polyamide to be uniformly kneaded, so that the molded product obtained from the mixed wire product has no variation.
An object of the present invention is to provide a resin composition having excellent mechanical properties and a molded article thereof.

[Means and effects for solving the problems] As a result of studies to achieve the above-mentioned object, the present inventors found that a composition comprising a mixture of polyester and polyamide further blended with a specific grafted polyolefin. The inventors discovered that the resulting molded product has a dense and homogeneous structure and excellent mechanical properties, leading to the completion of the present invention.

That is, the present invention provides (a) 5 to 95% by weight of polyamide
and (b) 100 parts by weight of a mixture consisting of 95-5% by weight of thermoplastic polyester.

(C) Grafted polyolefin modified product 0 obtained by graft polymerizing an addition polymer having a peroxide bond in the molecular chain to a modified polyolefin having a functional group in the molecular chain.
．． 5 to 35 parts by weight, and a molded article thereof.

The polyamide used as component (a) in the present invention is not particularly limited, and any polymer can be used as long as it is obtained from an amino acid, a lactam, or a diamine, and a dicarboxylic acid, and can be melt-polymerized and melt-molded. Good too.

Among the monomers used as raw materials for producing the polyamide of component (a), examples of amino acids include 6-7 minocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, para-aminomethylbenzoic acid, etc.; Examples of lactams include ε-caprolactam and ω-laurolactam; examples of diamines include tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, and 2,2.4- /2,4,4-)
Limethylhexamethylenediamine, 5-methylnonamethylenediamine, metaxylylenediamine, paraxylylenediamine, 1゜3-bis(aminomethyl)cyclohexane, 114-bis(aminomethyl)cyclohexane,
1-Amino-3-7minomethyl-3.5.5-)limethylcyclohexane, bis(4-7minocyclohexyl)
Methane, bis(3-methyl-4-aminocyclohexyl)methane, 2,2-bis(4-aminocyclohexyl)
Examples include propane, bis(aminopropyl)piperazine, and aminoethylpiperazine. Examples of dicarboxylic acids include adipic acid, superic acid, azelaic acid, sebacic acid, dodecanniic acid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid, 5- Examples include sodium sulfoisophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, and diglycolic acid.

Preferred polyamides as component (a) of the present invention are, for example, polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 6.6), polyhexamethylene dodecamide (nylon 6.10), polyundecamide Methylene adipamide (nylon 11.6), polyhexamethylene dodecamide (nylon 6.12), polyundecaneamide (nylon 11), polydodecanamide (nylon 12), copolyamides thereof, mixed polyamides, etc. can be mentioned.

The polyamide of component (a) preferably has a relative viscosity in the range of 2.0 to 5.0 at 25° C. of a solution obtained by dissolving it in concentrated sulfuric acid to a concentration of 1%.

The thermoplastic polyester resin used in the present invention as component (b) is a polymer obtained by a condensation reaction mainly containing a dicarboxylic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof.

Examples of dicarboxylic acids used here include terephthalic acid, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, bisbenzoic acid, bis(p-carboxyphenyl)methane,
Anthracene dicarboxylic acid, 4,4'-diphenyl ether dicarboxylic acid, 4,4'-diphenoxyethane dicarboxylic acid, adipic acid, sebacic acid, azelaic acid, dodecandioic acid, 1,3-cyclohexane dicarboxylic acid, 1
．． Examples include 4-cyclohexanedicarboxylic acid or ester-forming derivatives thereof alone or in mixtures. Diol components include ethylene glycol, propylene gelcol, 1.4-butanediol, neopentyl gelcol, 1.5-bentanediol, ■, 6
-Hexanediol, decamethylene glycol, cyclohexane dimetatool, cyclohexanediol, long chain glycols with a molecular weight of 400 to 6,000, namely polyethylene glycol, polypropylene glycol, polytetramethylene glycol and mixtures thereof.

As the thermoplastic polyester of component (b), for example,
Polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polycyclohexane dimethylene terephthalate, poly(ethylene terephthalate/ethylene isophthalate) copolymer, poly(butylene terephthalate/bricine dodecadiate) copolymer Examples include polymers.

Particularly useful in this invention are polyethylene terephthalate and polybutylene terephthalate.

The thermoplastic polyester of component (b) preferably has a relative viscosity of 1.15 to 2.5 at 25°C in a solution obtained by dissolving it in orthochlorophenol to a concentration of 0.5%. .3 to 2.1 is more preferred.

The grafted polyolefin modified product of component (C) used in the present invention can be obtained by graft polymerizing an addition polymer having a peroxide bond in one molecule chain to a modified polyolefin having a functional group in one molecule chain. This component (C) is a component that contributes to making the polyamide of component (a) and the thermoplastic polyester of component (b) compatible.

The modified polyolefin having a functional group in its molecular chain (hereinafter simply referred to as "modified polyolefin"), which is one of the raw materials for producing component (C), is composed of ethylene and α-olefins having 3 to 20 carbon atoms and dienes, such as propylene. , butene-1, pentene-1,4-methylpentene-1, inbutylene, 1,4-hexadiene, dicyclopentadiene, 2,5-norbornadiene, 5-ethyl-2,5-norbornadiene, 5-ethylidenenorbornene , 5-(
1'-propenyl)-2-norbornene, butadiene,
Carboxylic acid groups, carboxylic acid metal bases, carboxylic ester groups, acid anhydride groups, epoxy groups, acid amide groups and This is a polymer into which a monomer having at least one functional group selected from imide groups (hereinafter referred to as "functional group-containing monomer") is introduced.

-COR□ (I)〇-COM (II)-C-N
(Vl) (In the above formula, R□ to R4 are hydrogen atoms or aliphatic atoms having 1 to 30 carbon atoms,
Represents an alicyclic or aromatic residue (1M represents a mono- to trivalent metal such as sodium, potassium, magnesium, zinc or aluminum) Examples of functional group-containing materials include acrylic acid, methacrylic acid, Maleic acid, fumaric acid, itaconic acid, crotonic acid, methylmaleic acid, methylfumaric acid, mesaconic acid, citraconic acid, glutaconic acid, methyl hydrogen maleate, methyl hydrogen itaconate, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, methyl methacrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, aminoethyl methacrylate, dimethyl maleate, dimethyl itaconate, sodium methacrylate, potassium methacrylate, methacrylate magnesium acrylate, zinc methacrylate, sodium acrylate, magnesium acrylate, zinc acrylate, maleic anhydride, itaconic anhydride, citraconic anhydride, endobicyclo-[2,2,1]-5-heptene-2,3- dicarboxylic acid, endobicyclo-[2,2,1]-5-heptene-2,3-dicarboxylic anhydride, glycidyl acrylate,
α of glycidyl methacrylate, aryl glycidyl ether, vinyl glycidyl ether, vinyl acetate, acrylamide, etc.

β-unsaturated carboxylic Mu conductor and α described here,
Ammonia to β-unsaturated carboxylic acid or its anhydride,
Methylamine, ethylamine, butylamine, hexylamine, dodecylamine, oleylamine, stearylamine, cyclohexylamine, benzylamine, aniline, naphthylamine, dimethylamine, diethylamine, methylethylamine, dibutylamine, distearylamine, dicyclohexylamine, ethylcyclohexylamine, Methylaniline, phenylnaphthylamine, melamine, ethanolamine, 3-amino-l-propanol, jetanolamine, morpholine, α-amino-1-pyrrolidone, α-amino-(-caprolactam, α-monomethylamino-(-caprolactam), These include N-substituted amide compounds and N-substituted imide compounds obtained by adding α-monoethylamino-(-caprolactam, α-monobenzylamino-ε-caprolactam, nylon 6 oligomer with a terminal amino group, etc.).

Examples of methods for producing modified polyolefins by introducing functional group-containing monomers into polyolefins include α-
A method of copolymerizing a monomer such as an olefin with the functional group-containing polymer, or a method of combining the monomer with a polyolefin can be applied. Here, the amount of the functional group-containing monomer introduced into the polyolefin is such that the content of structural units based on the monomer in the modified polyolefin is preferably 0.001 to 7.
The amount is 0% by weight, more preferably 0.01 to 60% by weight.

Preferred modified polyolefins as raw materials for producing component (C) are listed below, and in the following, rgJ represents, for example, "graft copolymer of X and Y" in the case of rX-g-YJ. shall be taken as a thing. That is, preferred modified polyolefins include, for example, ethylene/acrylic acid copolymer, ethylene/methacrylic acid/sodium methacrylate copolymer, ethylene/methacrylic acid/zinc methacrylate copolymer, and ethylene/methyl methacrylate/methacrylate copolymer. /magnesium methacrylate copolymer, ethylene/isobutyl acrylate/methacrylic acid/zinc methacrylate copolymer, ethylene/methyl acrylate copolymer, ethylene/methyl acrylate/acrylic acid copolymer, ethylene/ethyl acrylate Copolymer, ethylene/glycidyl methacrylate copolymer, ethylene/
Vinyl acetate/glycidyl methacrylate copolymer, polyethylene-g-maleic anhydride copolymer, polypropylene-g-maleic anhydride, poly(ethylene/furopylene)-g-11 hydrated maleic acid, poly(ethylene/furopylene/1) , 4-hexadiene)-g-maleic anhydride, poly(ethylene/fluoropylene/dicyclopentadiene)-g-fll mamaeric acid poly(ethylene/propylene 15-ethylidenenorbornene)-g-maleic anhydride, poly(ethylene/ propylene)-g-endobicyclo-[2,2,1]-5-heptene-2,3-dicarboxylic anhydride, poly(ethylene/methacrylic acid/zinc methacrylate)-g-nylon 6 oligomer with average degree of polymerization 10 , poly(ethylene/propylene)-g-maleic anhydride copolymer with cyclohexylamine added, poly(ethylene/propylene)-g-maleic anhydride with α-
Examples include copolymers to which amino-ε-caprolactam is added.

Such a modified polyolefin preferably has a melt index of 0.05 to 50 g/10 min, more preferably 0.1 to 30 g/10 min. If the melt index is outside these ranges, kneading processability will be poor when grafting the modified polyolefin with the addition polymer described below, which is not preferable.

The other raw material for component (C) is an addition polymer having peroxide bonds in its molecular chain (hereinafter simply referred to as "addition polymer").
) is an addition polymer having a peroxide bond in either the main chain, the side chain, or both in the molecular chain.

Such addition polymers include non-conjugated and/or conjugated vinyl monomers and allyl compounds having peroxide bonds and/or compounds containing acryloyloxy or methacryloyloxy groups (hereinafter referred to as "compounds having peroxide bonds"). ) can be obtained by addition polymerization using a conventional method, for example, an addition polymer obtained by addition polymerizing the vinyl monomer and a compound having a peroxide bond, or an addition polymer obtained by adding the vinyl monomer and a compound having a peroxide bond Any addition polymer obtained by addition-polymerizing a vinyl monomer that is the same as or different from the vinyl monomer described above may be used.

Here, examples of the conjugated vinyl monomer include methyl methacrylate, butyl methacrylate, methyl acrylate, butyl acrylate, 3-vinyl methyl acrylate, styrene, vinyl anisole, etc., and examples of the non-conjugated vinyl monomer include: Examples include vinyl acetate, vinyl chloride, vinyl fluoride, vinyl ketone, and vinyl ether. As an allyl compound having a peroxide bond, allyl t-butyl peroxycarbonate can be cited as a representative example, but in addition to this, any compound or derivative having an allyl group and a peroxide bond may be used. Examples of the acryloyloxy or methacryloyloxy group-containing compound having a peroxide bond, which is not a peroxide bond, include acryloyloxy t-butyl peroxy carbonate and methacryloyloxy t-butyl peroxy carbonate.

Preferred examples of the addition polymer are listed below, and in the following, "b" represents "a block copolymer of X and Y", for example in the case of rX-b-YJ.

That is, addition polymers include 5, for example, poly(vinyl acetate/allyl t-butylperoxycarbonate-b-styrene) addition polymer, poly(n-butyl methacrylate/methacryloyloxymethyl t-butylperoxycarbonate)-b-styrene. ) addition polymers.

Poly(n-butyl acetate/methacryloyloxymethyl t
-butylperoxycarbonate)-b-styrene) addition polymer, poly(butyl methacrylate/methacryloyloxymethyl t-butylperoxycarbonate-b-methyl methacrylate) addition polymer, poly(vinyl acetate/allyl t-butylperoxy) Carpone)-b-methyl methacrylate) addition polymers and the like.

Such an addition polymer preferably has an average molecular weight of 1.00.
0 to 200.000, more preferably 5.00
0 to 100,000. If the average molecular weight is outside these ranges, the kneading processability will deteriorate in grafting with the modified polyolefin, which is undesirable.Also, the content of peroxide bonds in the addition polymer may be lower than the structural unit based on the peroxide bond-containing compound. Preferably 0.5 to 30% by weight
and more preferably 1 to 25% by weight. If the peroxide bond content in the addition polymer is too low, it is undesirable because the grafting effect will be significantly reduced in grafting with modified polyolefin, and if it is too high, gelation will occur in grafting with modified polyolefin. , and a preferred grafted polyolefin modified product cannot be obtained.

The grafted polyolefin modified product of component (C) can be obtained by grafting an addition polymer onto the above-mentioned modified polyolefin by a conventional method.

Here, the usage ratio of the modified polyolefin and the addition polymer is not particularly limited, but preferably 1 to 5% of the addition polymer is used to 50 to 99% by weight of the modified polyolefin.
0% by weight, more preferably modified polyolefin 5
For 5-97% by weight, 3-45% by weight of addition polymer is used. If the amount of addition polymer used is too small, problems may occur such as the inability to obtain a composition that provides desirable physical properties when the resulting grafted polyolefin modified product is added to a mixture of polyamide and thermoplastic polyester. arise. Examples of the grafted polyolefin modified product of component (C), in which if the amount is too large, it is impossible to form a dense structure of thermoplastic polyester or polyamide particles, and it is impossible to obtain a composition that provides preferable physical properties. Examples include poly(ethylene/acrylic acid)-g-poly(acrylic ugly butyl-b-styrene), poly(ethylene/methacrylic acid/sodium methacrylate)-g-poly(butyl acrylate-b-styrene), poly( ethylene/methacrylic acid/zinc methacrylate)-g-poly(butyl acrylate-b-styrene), poly(ethylene/methyl methacrylate/magnesium methacrylate)-g-poly(butyl acrylate-b-styrene), poly (ethylene/isobutyl acrylate/methacrylic acid/methacrylic acid/zinc methacrylate)-g-poly(butyl acrylate-b-styrene), poly(ethylene/methyl acrylate)-g-poly(butyl acrylate-b-) styrene), poly(ethylene/methyl acrylate/acrylic acid)-g-
Poly(butyl acrylate-b-styrene), poly(ethylene/ethyl acrylate)-g-poly(butyl acrylate-b-styrene), poly(ethylene/glycidyl methacrylate)-g-poly(butyl acrylate) b-styrene), poly(ethylene/vinyl acetate/glycidyl methacrylate)-g-poly(butyl acrylate-b-styrene), (polyethylene-g-maleic anhydride)-g-poly(butyl acrylate-b- styrene), (polypropylene-g-maleic anhydride)-g-poly(butyl acrylate-b-styrene), poly[(ethylene/propylene)
-g-1 hydromaleic acid]-g-poly(butyl acrylate-b-styrene), poly[(ethylene/furopylene/1
, 4-hexadiene)-g-maleic anhydride]-g-poly(butyl acrylate-b-styrene), poly[(ethylene/propylene/dicyclopentadiene)-g-maleic anhydride]-g-poly (butyl acrylate-b-styrene), poly[alpha-7 minnow q-cabrolactam adduct to (ethylene/flobiley)-g-maleic anhydride]
-g-poly(butyl acrylate-b-styrene), poly(ethylene/acrylic acid)-g-poly(butyl acrylate-b-butyl acrylate), poly(ethylene/methacrylic acid/sodium methacrylate)-g -Poly(butyl acrylate-b-methyl acrylate), poly(ethylene/methacrylic acid/methacrylic acid)-g-poly(butyl acrylate-b-methyl acrylate), poly(ethylene/methacrylic acid/methacrylic ugly zinc) )-g-poly(butyl acrylate-b-methyl acrylate), poly(ethylene/methyl methacrylate/methacrylic acid/magnesium methacrylate)-g-poly(butyl acrylate-b-butyl acrylate), poly( ethylene/isobutyl acrylate/methacrylic acid/zinc methacrylate)-g-poly(
Butyl acrylate-b-methyl acrylate), poly(ethylene/methyl acrylate)-g-poly(butyl acrylate-b-methyl acrylate), poly(ethylene/methyl acrylate/acrylic acid)-g-poly (butyl acrylate-b-methyl acrylate), poly(ethylene/ethyl acrylate)-g-poly(butyl acrylate-b-methyl acrylate), poly(ethylene/glycidyl methacrylate)-g-poly(acrylic Butyl acrylate-b-methyl acrylate), poly(ethylene/vinyl acetate/glycidyl methacrylate)-g-poly(butyl acrylate-b-methyl acrylate), (polyethylene-g-maleic anhydride)-g-poly (Butyl acrylate-b-methyl acrylate), (polypropylene-g-maleic anhydride)-
g-poly(butyl acrylate-b-methyl acrylate)
, poly[(ethylene/propylene)-g-maleic anhydride]-g-poly(butyl acrylate-b-methyl acrylate), and the like.

The grafting efficiency calculated from the following formula of the addition polymer in the grafted polyolefin modified product of component (C) is preferably 1% or more, more preferably 5% or more.

If the grafting efficiency is too low, the effect of making the polyamide and thermoplastic polyester compatible will not be observed, which is not preferable.

In addition, the grafted polyolefin modified product of component (C) preferably has a melt index of 0.01 to 40g7.
10 minutes, more preferably o, i~30g/10
Normally, when a modified polyolefin and an addition polymer are grafted, the melt index is significantly lowered, but this does not affect the effects of the present invention, and those with a melt index exceeding 40 g/10 minutes are considered polyamides. When added to thermoplastic polyester, a composition that provides desirable physical properties cannot be stably obtained.

The resin composition of the present invention comprises a predetermined amount of component (a) and component (b).
) can be obtained by blending a predetermined amount of component (C) into a mixture.

The blending amount of component (a) and component (b) is 5 to 5% of component (a).
95% by weight, and component (b) is 95-5% by weight. If the amount of component (a) is 5% by weight without vortexing, the excellent advantages of polyamide such as chemical resistance and abrasion resistance will not be exhibited, and disadvantages such as the hydrolyzability of thermoplastic polyester will appear. Also, if the amount of component (a) is 9
If it exceeds 5% by weight, it is not preferable because water absorption is high and dimensional changes become large.Furthermore, the preferred blending ratio of component (a) and component (b) is that component (a) is 35 to 90%.
% by weight, and component (b) is 65 to 10% by weight.
In the present invention, it is preferable that the polyamide and thermoplastic polyester constituting the composition form a so-called sea/island structure (here, the sea represents the thermoplastic polyester and the islands represent the polyamide; Island structure refers to a state in which polyamide particles with a slightly larger particle size are dispersed in thermoplastic polyester particles with a smaller particle size.)
In the above preferred blending ratio, if the blending ratio of component (JL) is less than 35% by weight, it is not very preferable because the above sea/island structure cannot be formed.

The blending amount of component (C) is 0.5 to 4 parts by weight per 100 parts by weight of the mixture of component (a) and component (b) in the above blending ratio.
0 parts by weight, preferably 1 to 35 parts by weight, and more preferably 2 to 30 parts by weight. Here, the ingredients (
When the amount of C) is less than 0.5 parts by weight, component (a)
) and component (b) is reduced, when the composition is melt-kneaded, both components cannot be uniformly dispersed and the particle diameters of the dispersed components become large. As a result, it is impossible to obtain a molded product with a dense and homogeneous structure, resulting in deterioration and variation in its properties. Furthermore, if the amount of component (C) exceeds 40 parts by weight, it becomes difficult for component (a) and component (b) to exhibit their respective characteristics.

The resin composition of the present invention may contain other components as long as they do not impair its moldability and physical properties, such as pigments, dyes, reinforcing materials, fillers, heat resisters, antioxidants, weathering agents, lubricants, crystal nucleating agents,
Antiblocking agents, mold release agents, plasticizers, flame retardants, antistatic agents, other polymers, and the like can be added and blended. In particular, the addition of reinforcing materials and fillers is important, and m! l
A reinforcing material in the form of a solid or a powder can be added and blended.

The method for producing the resin composition of the present invention is not particularly limited, and for example, a method of melt-kneading components (a) to (C) using a spindle or multi-screw extruder can be applied.

A molded article having excellent mechanical properties can be obtained by melt-kneading the resin composition of the present invention as described above and then molding it by a method such as injection molding, extrusion molding, blow molding, or compression molding. can.

This molded product is formed by uniformly dispersing each constituent component, and in particular, the thermoplastic polyester of component (b) is molded as particles with an average particle size of 2- or less, and furthermore, 1 g or less. It exists throughout the body. This indicates that the resin composition was melt-kneaded in a uniform state, and that the obtained molded product had a dense and homogeneous structure.

Such molded bodies are useful as constituent materials for various automobile parts, mechanical parts, electrical or electronic parts, and general miscellaneous goods.

[Example] Hereinafter, the present invention will be explained in more detail with reference to Examples.

In addition, evaluation of each characteristic of the molded object below was performed by the following method.

(1) Tensile strength: ASTM D638 (2) Tensile elongation at break: ASTM D638 (3) Bending strength: A
STM D790 (4) Flexural modulus: ASTM 0
790 (5) Izot impact strength: ASTM D25
6 (6) Heat distortion temperature: 1 according to ASTM D648
Measurement was performed 0 times, and the display shows the minimum value, maximum value, and average value.

(7) Dispersed particle size of thermoplastic polyester: Prepare a small piece of each molded product using a microtome, dye the small piece with Rhodamine B, wash with water, and then analyze with an optical microscope (X 10
00), the particle size of the thermoplastic polyester particles in the small pieces was measured.

Examples 1-13 and Comparative Examples Using the following components as components (a) to (c) of the resin composition of the present invention, a resin composition was prepared using the combinations and amounts of each component shown in Table 1. A test piece for each characteristic evaluation was produced as a molded body.

戊j−ΩlΣ (a) −1 Nylon 66 (Nylon 66 manufactured by Ube Industries ■
, grade name 2020B) (a) -2 nylon 6 (Nylon 6 manufactured by Ube Industries ■, grade name 1013B) (a) -3 Nylon 12 (Nylon 12 manufactured by Ube Industries ■)
, grade name 3035U)
Polyethylene terephthalate manufactured by Teijin Corporation, grade name J125) (b) -2 Polybutylene terephthalate (Polybutylene terephthalate manufactured by Teijin ■, grade name C Angry Yue (c) -1 Poly(ethylene/glycidyl methacrylate) copolymer (ethylene/methacrylate) Glycidyl acid = 85
715) and 30 parts by weight of poly(butyl acrylate-b-methyl acrylate) having a peroxide bond in the side chain (butyl acrylate/methyl acrylate = lO/90) using a melt extruder. , a grafted polyolefin modified product (manufactured by NOF ■) which is poly(ethylene/glycidyl methacrylate)-g-poly(butyl acrylate-b-methyl acrylate) obtained by melt-kneading at a melting temperature of 200±20°C. , grade name Modipar A4200) (c) -2 poly(ethylene/glycidyl methacrylate) copolymer (ethylene/glycidyl methacrylate = 85
715) and 30 parts by weight of poly(butyl acrylate-b-styrene) having a peroxide bond in the side chain (butyl acrylate/styrene = IO'/90) using a melt extruder, Poly(ethylene/glycidyl methacrylate) obtained by melt-kneading at 200±20°C
A molded article of a grafted polyolefin modified product (manufactured by NOF ■, grade name: MODIPER A4100), which is g-poly(butyl acrylate-b-styrene), was produced by the following method. First, each component was premixed in the amounts shown in the table, and then melted and kneaded at 280°C using an extruder with a screw diameter of 30 layers to form pellets. Thereafter, after vacuum drying the pellets, the cylinder temperature was 280°C using an injection molding machine.
Injection molding was performed at a mold temperature of 80°C and a molded body. Evaluation tests were conducted using the obtained molded bodies as test pieces for each characteristic evaluation. The results are shown in the table.

As is clear from the table above, each of the molded bodies of the examples showed excellent values for tensile strength, tensile elongation at break, bending strength, bending modulus, and isot impact strength, and thermal deformation. The temperature is high and the variation is small, and in particular, with respect to each of these properties, the smaller the amount of component (c) mixed within the predetermined range, the better the results. Further, the average particle diameter of the thermoplastic polyester dispersed in the molded body is 2 or less in all cases, and most of the particles are 1 or less. This indicates that each component was melted and kneaded in a uniform state, and that the molded product had a dense and homogeneous structure.

On the other hand, the molded bodies of Comparative Examples showed excellent values for tensile strength, bending strength, and bending modulus, but were low in tensile elongation at break and Izot impact strength. In addition, although there were some examples in which the heat distortion temperature showed a high value, in all cases the variation was very large. The average particle diameter of the thermoplastic polyester dispersed in the molded body was 3 or more in all cases. This means that when polyamide and polyester are melt-kneaded,
This shows that the uniformity of the blue component is inferior to that of the example.

[Effects of the Invention] As explained above, the composition of the present invention uses a grafted polyolefin modified product as a constituent component, so that polyamide and thermoplastic polyester, which are not originally compatible with each other, can be mixed in the form of fine particles. Moreover, they can be mixed and dispersed in a uniform state.

Furthermore, since the molded article of the present invention has a dense and homogeneous structure, it has very excellent mechanical properties, and its heat distortion temperature is high and has small variations.
Furthermore, the molded body does not cause layer separation.

Claims (2)

[Claims] (1) Mixture 100 consisting of (a) 5-95% by weight of polyamide and (b) 95-5% by weight of thermoplastic polyester
(c) A grafted polyolefin modified product obtained by graft polymerizing an addition polymer having a peroxide bond in the molecular chain to a modified polyolefin having a functional group in the molecular chain.
．． A resin composition comprising 5 to 35 parts by weight. (2) To a mixture consisting of (a) 5 to 95% by weight of polyamide and (b) 95 to 5% by weight of thermoplastic polyester (c
) Modified polyolefin with functional groups in the molecular chain,
A molded article of a composition comprising a modified grafted polyolefin obtained by graft polymerizing an addition polymer having a peroxide bond in the molecular chain, wherein the molded article contains particles having an average particle size of 2 μm or less. A molded article characterized in that the thermoplastic polyester particles are dispersed therein.