JPH0643547B2 - High rigidity resin composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a high-rigidity resin composition useful as a constituent material for various automobile parts, mechanical parts, electric or electronic parts, and general sundries.

[Prior Art] Thermoplastic polyesters typified 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 with different applications, taking advantage of their excellent toughness, abrasion resistance, and chemical resistance. There is.

Conventionally, it has been attempted to combine the above polyester and polyamide to utilize the excellent properties of each and to alleviate the problems of each. The present inventors have already proposed to use a specific modified polyolefin or a specific polyamide as a method for improving these problems.
No. 0 and Japanese Patent Application No. 62-212389.

[Problems to be Solved by the Invention] When a polyester and a polyamide are mixed, usually,
Although a melt kneading method is applied, a uniform kneaded product cannot be obtained because polyester and polyamide have poor compatibility. In order to solve such problems, methods of adding various compatibilizers have been studied, but by these methods, the mechanical properties of the kneaded mixture of polyamide and polyester formed, especially the bending rigidity are naturally It depends on the flexural rigidity of the compounded composition.

That is, an object of the present invention is to provide a resin composition having a greatly improved flexural rigidity without depending on the mechanical properties (particularly with respect to flexural rigidity) of the compounded composition.

[Means and Actions for Solving Problems] As a result of studies to achieve the above-mentioned object, the present inventors further added to a resin composition containing a specific grafted polyolefin of polyester and polyamide, The resin composition containing the methylene dimelamine compound has mechanical properties,
In particular, it was found that a great improvement was found in the flexural modulus, and the present invention was completed.

That is, the present invention provides (a) 5 to 95% by weight of polyamide and
0.5 to 40 parts by weight of a grafted polyolefin modified product obtained by graft-polymerizing 100 parts by weight of a mixture composed of 95 to 5% by weight of a thermoplastic polyester and (c) an addition polymer having a peroxide bond in the molecular chain. Parts and (d) 0.3 to 20 parts by weight of ethylene dimelamine, to a high-rigidity resin composition.

Component (a) polyamide used in the present invention is not particularly limited, any amino acid, obtained from lactam or diamine and dicarboxylic acid, and any polymer capable of melt polymerization and melt molding. Good.

Among the monomers used as the raw material for producing the polyamide of the component (a), examples of amino acids include 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and paraaminomethylbenzoic acid; lactams. As, for example, ε-caprolactam,
ω-lachloractam and the like can be mentioned; examples of the diamine include tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylene. Diamine, 5-methylnonamethylenediamine, metaxylylenediamine, paraxylylenediamine, 1,3-bis (aminomethyl) cyclohexane,
1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine, and the like. Examples of the dicarboxylic acid include adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanenic acid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid, 5- Sodium sulfoisophthalic acid, hexahydroterephthalic acid,
Hexahydroisophthalic acid; diglycolic acid and the like can be mentioned.

Polyamides preferable as the component (a) of the present invention include, for example, polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 6,6), polyhexamethylene sepacamide (nylon 6,10), polyundeca. Methylene adipamide (nylon 11,6), polyhexamethylene dodecamide (nylon 6,12), polyundecane amide (nylon 11), polydodecane amide (nylon 1)
2) and their copolymerized polyamides, mixed polyamides, and the like.

The polyamide as the component (a) is preferably one having a relative viscosity at 25 ° C. of 2.0 to 5.0 in a solution prepared by dissolving the polyamide in concentrated sulfuric acid so as to have a concentration of 1%.

The thermoplastic polyester as the component (b) used in the present invention is a polymer obtained by a condensation reaction of a dicarboxylic acid or its ester-forming derivative and a diol or its ester-forming derivative as main components.

Examples of the dicarboxylic acid 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'-diphenoxyethanedicarboxylic acid, adipic acid, sebacic acid, azelaic acid, dodecanenic acid, 1 , 3-Cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, or ester-forming derivatives thereof, alone or in a mixture. As the diol component, ethylene glycol, propylene glycol, 1,4-butanediol,
Neopentyl glycol, 1,5-pentanediol,
1,6-hexanediol, decamethylene glycole,
Examples thereof include cyclohexanedimethanol, cyclohexanediol, long-chain glycol having a molecular weight of 400 to 6,000, that is, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and mixtures thereof.

Examples of the thermoplastic polyester of the component (b) include polyethylene terephthalate, polymethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polycyclohexane dimethylene terephthalate, poly (ethylene terephthalate / ethylene sophthalate) copolymer Copolymers, poly (butylene terephthalate / butylene dodecanedioate) copolymers and the like can be mentioned, and particularly useful in the present invention are polyethylene terephthalate and polybutylene terephthalate.

The thermoplastic polyester of the component (b) is preferably a solution prepared by dissolving 0.5% of this in orthochlorophenol so that the relative viscosity at 25 ° C. is 1.15 to 2.5. Those of 3 to 2.1 are more preferable.

The grafted polyolefin modified product of the component (c) used in the present invention can be obtained by graft-polymerizing a modified polyolefin having a functional group in the molecular chain with an addition polymer having a peroxide bond in the molecular chain. The component (c) is composed of the polyamide of the component (a) and the component (b).
It is a component that contributes to compatibilizing the thermoplastic polyester of.

The modified polyolefin having a functional group in the molecular chain (hereinafter simply referred to as “modified polyolefin”), which is one of the raw materials for producing the component (c), is ethylene and α having 3 to 20 carbon atoms.
-Olefins and dienes such as propylene and butene-
1, pentene-1, 4-methylpentene-1, isobutylene, 1,4-hexadiene, dicyclopentadiene,
2,5-norbornadiene, 5-ethyl-2,5-norbornadiene, 5-ethylidene norbornene, 5-
In a polyolefin obtained by using (1'-propenyl) -2-norbornene, butadiene, isoprene and the like as a main monomer component, a carboxylic acid group represented by the following formulas (I) to (VI), a carboxylic acid metal base, a carboxylic acid ester group , A polymer having a monomer having at least one functional group selected from an acid anhydride group, an epoxy group, an acid amide group and an imide group (hereinafter referred to as “functional group-containing monomer”).

(In the above formula, R _{1 to} R ₄ are a hydrogen atom or a carbon number of 1 to 30.
Represents an aliphatic, alicyclic or aromatic residue, and M is a monovalent metal such as sodium, potassium, magnesium,
Examples of functional group-containing monomers include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, methylmaleic acid, methylfumaric acid, mesaconic acid, citraconic acid, glutaconic acid, and Methyl hydrogen maleate, methyl hydrogen itacone, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, methyl methacrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, methacrylic acid Aminoethyl, dimethyl maleate, dimethyl itaconate, sodium methacrylate, potassium methacrylate, magnesium methacrylate, zinc methacrylate, sodium acrylate, magnesium acrylate, zinc acrylate, none Maleic acid water, 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,
Glycidyl methacrylate, allyl glycidyl ether,
Α, β-Unsaturated carboxylic acid derivatives such as vinyl glycidyl ether, vinyl acetate and acrylamide, and α, β-unsaturated carboxylic acids or their anhydrides described above are ammonia, methylamine, ethylamine, butylamine, hexylamine and dodecyl. Amine, oleylamine, stearylamine, cyclohexylamine, benzylamine, aniline, naphthylamine, dimethylamine, diethylamine, methylethylamine, dibutylamine, distearylamine, dicyclohexylamine,
Distearylamine, dicyclohexylamine, ethylcyclohexylamine, methylaniline, phenylnaphthylamine, melamine, ethanolamine, 3-amino-1-propanol, diethanolamine, morpholine, α-amino-1-pyrrolidone, α-amino-ε-caprolactam, α-monomethylamine-ε-caprolactam, α-monoethylamino-ε-caprolactam, α
Examples include monobenzylamino-α-caprolactam, N-substituted amide compounds and N-substituted imide compounds obtained by adding nylon 6 oligomer hods having terminal amino groups.

As a method for producing a modified polyolefin by introducing a functional group-containing monomer into polyolefin, for example, α-
A method of copolymerizing a monomer such as an olefin and the functional group-containing monomer or a method of graft-polymerizing the monomer with a polyolefin can be applied. Here, the amount of the functional group-containing monomer to be introduced into the polyolefin is preferably 0.001 to 1 in the content of the structural unit based on the monomer in the modified polyolefin.
It is 70% by weight, more preferably 0.01 to 60% by weight.

The modified polyolefins which are preferable as a raw material for producing the component (c) are listed below. In the following, "g" is, for example,
In the case of "X-g-Y", "graft copolymer of X and Y"
It means that. That is, preferable modified polyolefins include, for example, ethylene / acrylic acid copolymers, ethylene / methacrylic acid / sodium methacrylate copolymers, ethylene / methacrylic acid / zinc methacrylate copolymers, ethylene / methyl methacrylate /
Methacrylic acid / magnesium methacrylate copolymer, ethylene / isobutyl acrylate / methacrylic acid / zinc methacrylate copolymer, ethylene / methyl acrylate copolymer, ethylene / methyl acrylate / acrylic acid copolymer, ethylene / acrylic Ethyl acid copolymer, ethylene /
Glycidyl methacrylate copolymer, ethylene / vinyl acetate / glycidyl methacrylate copolymer, polyethylene-g-maleic anhydride copolymer, polypropylene-g-
Maleic anhydride copolymer, poly (ethylene / propylene) -g-maleic anhydride, poly (ethylene / propylene / 1,4-hexadiene) -g-maleic anhydride, poly (ethylene / propylene / dicyclopentadiene)-
g-maleic anhydride, poly (ethylene / propylene / 5
-Erylidene norbornene) -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 having an average degree of polymerization of 10, poly (ethylene / propylene)- Examples thereof include copolymers obtained by adding cyclohexylamine to g-maleic anhydride, and copolymers obtained by adding α-amino-ε-caprolactam to poly (ethylene / propylene) -g-maleic anhydride.

The modified polyolefin has a melt index of preferably 0.05 to 50 g / 10 minutes, more preferably 0.1 to 30 g / 10 minutes. If the melt index is out of these ranges, it is not preferable because the kneading processability is poor at the time of grafting the modified polyolefin with the following addition polymer.

The addition polymer having a peroxide bond in the molecular chain (hereinafter simply referred to as "addition polymer"), which is the other raw material for the production of component (c), is either a main chain or a side chain in the molecular chain. Alternatively, it is an addition polymer having a peroxide bond in both.

Such an addition polymer is an allyl compound and / or an acryloyloxy group- or methacryloyloxy group-containing compound having a non-conjugated and / or conjugated vinyl monomer and a peroxide bond (hereinafter, these are referred to as “compound having a peroxide bond”). And) are added by an ordinary method to obtain an addition polymer obtained by addition-polymerizing the vinyl monomer and a compound having a peroxide bond. It may be any addition polymer obtained by addition-polymerizing a vinyl monomer which is the same as or different from the vinyl monomer.

Here, examples of the conjugated vinyl monomer include methyl methacrylate, butyl methacrylate, methyl acrylate, butyl acrylate, 3 vinyl methyl acrylate, styrene, vinyl anisole, and the like, and examples of the non-conjugated vinyl monomer include: Examples thereof include vinyl acetate, vinyl chloride, vinyl fluoride, vinyl ketone and vinyl ether. As the allyl compound having a peroxide bond, allyl t-butyl peroxycarbonate can be mentioned as a representative example, but it is not limited to this as long as it is a compound or derivative having an allyl group and having a peroxide bond. Not something.

Examples of the acryloyloxy or methacryloyloxy group-containing compound having a peroxide bond include acryloyloxy t-butylperoxycarbonate and methacryloyloxy t-butylperoxycarbonate.

Preferred examples of the addition polymer are listed below, but in the following, "b" means "X-Y-block copolymer" in the case of "X-B-Y", for example. .
That is, as the addition polymer, for example, poly (vinyl acetate / allyl t-butylperoxycarbonate-b-styrene) addition polymer, poly (n-butylmethacrylate / methacryloyloxymethyl t-butylperoxycarbonate-b-styrene) attached Addition polymer, poly (acetic acid n
-Butyl / methacryloyloxymethyl t-butyl peroxycarbonate-b-styrene) addition polymer, poly (butyl methacrylate / methacryloyloxymethyl t)
-Butyl peroxycarbonate-b-methyl methacrylate) addition polymer, poly (vinyl acetate / allyl t-butyl peroxycarbonate-b-methyl methacrylate)
An addition polymer etc. can be mentioned.

Such an addition polymer preferably has an average molecular weight of 100
0 to 200,000, more preferably 5,000
It is 0 to 100,000. If the average molecular weight is out of these ranges, the kneading processability in the grafting with the modified polyolefin is deteriorated, which is not preferable. The content of the peroxide bond in the addition polymer is preferably 0.5 to 30% by weight as a constitutional unit based on the compound containing the peroxide bond.
And more preferably 1 to 25% by weight. When the content of the peroxide bond in the addition polymer is too small, the grafting effect in the grafting with the modified polyolefin is significantly reduced, which is not preferable. On the other hand, when the amount is too large, gelation occurs in the grafting with the modified polyolefin, and a preferable grafted polyolefin-modified product cannot be obtained.

The grafted polyolefin modified product of the component (c) can be obtained by graft-polymerizing an addition polymer with the above-mentioned modified polyolefin by a conventional method.

Here, the use ratio of the modified polyolefin and the addition polymer is not particularly limited, but preferably 50 to 99% by weight of the modified polyolefin and 1 to 5 of the addition polymer.
0% by weight, and more preferably modified polyolefin 5
3 to 45% by weight of the addition polymer is used with respect to 5 to 97% by weight. When the amount of the addition polymer used is too small, when the resulting grafted polyolefin-modified product is added to the mixture of the polyamide and the thermoplastic polyester, problems such as the inability to obtain a composition giving preferable physical properties may occur. Occurs. On the other hand, if the amount is too large, it is not possible to form a dense structure of the thermoplastic polyester or polyamide particles, and it is not possible to obtain a composition that gives preferable physical properties. Examples of the modified grafted polyolefin as the component (c) include poly (ethylene / acrylic acid) -g-poly (butyl acrylate-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 (acrylic Acid butyl-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-maleic anhydride] -g-poly (butyl acrylate-b-styrene) Poly [(ethylene / propylene / 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 [(ethylene / propylene) -g
-Α-amino-ε-caprolactam adduct to maleic anhydride] -g-poly (butyl acrylate-b-styrene), poly (ethylene / acrylic acid) -g-poly (butyl acrylate-b-acrylic acid) Methyl), poly (ethylene / methacrylic acid / sodium methacrylate) -g-poly (butyl acrylate-b-methyl acrylate), poly (methylene / methacrylic acid / methacrylic acid) -g-poly (butyl acrylate-b) -Methyl acrylate), poly (ethylene / methacrylic acid / zinc methacrylate) -g-
Poly (butyl acrylate-b-methyl acrylate), poly (ethylene / methyl methacrylate / methacrylic acid / magnesium methacrylate) -g-poly (butyl acrylate-b-methyl acrylate), poly (ethylene / acrylic acid Isobutyl / 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 (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 following formula of the addition polymer in the grafted polyolefin modified product of the component (c): The graft efficiency calculated from the above is preferably 1% or more, more preferably 5% or more. If the grafting efficiency is too low, the compatibilizing effect between the polyamide and the thermoplastic polyester is not recognized, which is not preferable.

Further, the grafted polyolefin modified product of the component (c) is
Melt index is preferably 0.01 to 40 g / 1
It is 0 minutes, more preferably 0.1 to 30 g / 10 minutes. Usually, when the modified polyolefin and the addition polymer are grafted, the melt index is significantly lowered, but the effect of the present invention is not affected at all. When the melt index is more than 40 g / 10 minutes, a composition that gives preferable physical properties cannot be stably obtained when added to polyamide and thermoplastic polyester.

The component (d) of the present invention, ethylene dimelamine, is a known compound, for example, the method disclosed in JP-B-61-53348, JP-A-60-50968, or JP-A-59-186965. Obtainable.

The resin composition of the present invention comprises a mixture of a predetermined amount of component (a) and component (b), a predetermined amount of component (c), and a predetermined amount of component (d). It can be obtained.

The blending amounts of the component (a) and the component (b) are 5 to 95% by weight of the component (a) and 95 to 5% by weight of the component (b). If the content of the component (a) is less than 5% by weight, the polyamide does not exhibit excellent advantages such as chemical resistance and abrasion resistance.
The disadvantages such as the hydrolyzability of the thermoplastic polyester are exhibited, which is not preferable. On the other hand, if the content of the component (a) exceeds 95% by weight, the water absorption is high and the dimensional change is large, which is not preferable. Further, the preferable blending ratio of the component (a) and the component (b) is 35 to 90% by weight of the component (a) and 65 to 10% by weight of the component (b).

The blending amount of component (c) is the same as that of component (a) in the above blending ratio.
The amount is 0.5 to 40 parts by weight, preferably 1 to 35 parts by weight, and more preferably 2 to 30 parts by weight, relative to 100 parts by weight of the mixture with (b). Here, when the amount of the component (c) is less than 0.5 part by weight, the components (a) and
Since the effect of compatibilizing (b) with is reduced, when the composition is melt-kneaded, both components cannot be uniformly dispersed, and the dispersed particle size of both components becomes large. Therefore, it is not possible to obtain a compact having a dense and uniform structure, which causes deterioration or variation in mechanical properties. Further, when the amount of the component (c) compounded exceeds 40 parts by weight, it becomes difficult to exhibit the characteristics possessed by the component (a) and the component (b), respectively.

The blending amount of component (d) is the same as that of component (a) in the above blending ratio.
0.3 based on 100 parts by weight of the mixture of (b) and component (c)
To 20 parts by weight, preferably 0.5 to 15 parts by weight, and more preferably 0.5 to 10 parts by weight. If the amount of component (d) is less than 0.3 parts by weight, the resin composition having high rigidity, which is the object of the present invention, cannot be obtained. On the other hand, if it exceeds 20 parts by weight, a resin composition having high rigidity can be obtained, but other mechanical properties such as tensile elongation and impact strength are unfavorably lowered.

The resin composition of the present invention, other moldability, other components as long as the physical properties are not impaired, such as pigments, dyes, heat-resistant agents,
Anti-antioxidant, weather resistance, lubricant, crystal nucleating agent, antiblocking agent, release agent and the like 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 (d) using a uniaxial or multiaxial extruder can be applied.

A resin composition of the present invention is melt-kneaded as described above, and then molded by a method such as injection molding, extrusion molding, blow molding or compression molding to have a molded product having excellent mechanical properties. You can Such a molded product is useful as a constituent material for various automobile parts, mechanical parts, electric or electronic parts, and general sundries.

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

In addition, the evaluation of each characteristic of the molded article below was performed by the following methods.

(1) Tensile strength: ASTM D638 (2) Tensile elongation at break: ASTM D638 (3) Bending strength: ASTM D790 (4) Bending elastic modulus: ASTM D790 Examples 1 to 5 and Comparative Examples Resin compositions of the present invention The following components are shown in the table as components (a) and (b). A resin composition was produced with a combination of each component and a compounding amount, and a test piece for each characteristic evaluation was produced as a molded body.

Ingredients (a) (a) -1 Nylon 66 (Nylon 6 manufactured by Ube Industries, Ltd.)
6, grade name 2015B) (a) -2 nylon 6 (nylon 6, manufactured by Ube Industries, grade name 1013B) Component (b) (b) -1 polyethylene terephthalate (polyethylene terephthalate manufactured by Kuraray Co., Ltd., grade name KS700Y)
T) (b) -2 Polybutylene terephthalate (Polyethylene terephthalate manufactured by Teijin Ltd., grade name C7000) Component (c) Poly (ethylene / glycidyl methacrylate) copolymer (ethylene / glycidyl methacrylate = 85/15) Using a melt extruder, 70 parts by weight and 30 parts by weight of poly (butyl acrylate-b-styrene) (butyl acrylate / styrene = 10/90) having a peroxide bond in the side chain, a melting temperature of 200 ± 20 ° C. Poly (ethylene / glycidyl methacrylate) -g-poly (butyl acrylate-b-styrene) obtained by melting and kneading with a grafted polyolefin modified product (NOF CORPORATION, grade name Modiper A4100) component (d) Ethylene dimelamine (manufactured by Nitto Riken Co., Ltd.) The composition was manufactured by the following method. First, the respective components in the amounts shown in the table were premixed, and then melt-kneaded at a resin temperature of 275 ° C. into a pellet by using a twin-screw extruder having a screw diameter of 30 mm. Then, the pellets are vacuum dried, and then the temperature of the cylinder is 280 ° C. and the mold temperature is 80 by an injection molding machine.
Injection molding was performed under the condition of ° C to obtain a composition. An evaluation test was conducted using the obtained composition as a test piece for each characteristic evaluation. The results are shown in the table.

As is clear from the table shown above, the compositions of the examples show excellent values in all of tensile strength, bending strength, and bending elastic modulus, and in particular, the bending elastic modulus is significantly improved. .

On the other hand, each of the molded articles of the comparative example shows a low value in terms of tensile strength, bending strength, and bending elastic modulus as compared with the examples.

[Effects of the Invention] As described above, the composition of the present invention can greatly improve strength and rigidity by using a grafted polyolefin-modified product and ethylene dimelamine as its constituent components.

Claims (1)

[Claims] 1. A mixture 10 comprising (a) 5 to 95% by weight of polyamide and (b) 95 to 5% by weight of thermoplastic polyester.
0.5 to 40 parts by weight of a grafted polyolefin modified product obtained by graft-polymerizing 0 part by weight and (c) a modified polyolefin having a functional group in the molecular chain with an addition polymer having a peroxide bond in the molecular chain. And (d) 0.3 to 20 parts by weight of ethylene dimelamine, a high-rigidity resin composition.