JPS6310656A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To provide the title compsn. having excellent rigidity, moldability and resistance to impact and heat, by blending a specified polyphenylene ether with a polyamide and a (hydrogenated) block copolymer elastomer. CONSTITUTION:100pts.wt. polyphenylene ether (i) of the formula [wherein Q1, Q2 Q3 and Q4 are each H, halogen, a (halo)hydrocarbon or a (halo) hydrocarbonoxy; n is the total number of monomers and 20 or greather] is reacted with 0.1-20pts.wt. 1,2-substd. olefin compd. (ii) having a carboxyl group or carboxylic acid anhydride structure in the presence of 0.1-30pts.wt. [based on the amount of the component (ii)] radical-generating agent to obtain a polyphenylene ether (a) having a carboxyl group and/or carboxylic acid anhydride structure as part of substituents. 5-95wt% component (a) is blended with 5-90wt% polyamide (b) and 5-60wt% (hydrogenated) A-B-A' block copolymer elastomer (c) (wherein A and A' are each a polymerized hydrocarbon block; and B is a polymerized conjugated block which may be hydrogenated).

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention consists of a modified product of polyphenylene ether, polyamide, and a block copolymer elastomer, and has excellent impact resistance represented by Izot impact strength and flexural modulus. The present invention relates to a thermoplastic resin composition that is well-balanced and excellent in rigidity, heat resistance as represented by heat distortion temperature, and moldability.

<Prior Art> Polyphenylene ether is a resin that has excellent properties such as heat resistance and rigidity, and is attracting attention as an engineering plastic, but it has poor impact resistance. Moreover, since the resin has a high melt viscosity, high temperatures are required to mold the resin itself while melting it, which causes various undesirable problems such as discoloration and oxidative deterioration.

To solve this problem, a resin composition of polyphenylene ether and rubber-modified polystyrene resin is disclosed in US Pat. No. 3,383,435.

Furthermore, a method has been proposed in which a rubber-like elastic body is blended in order to improve the impact resistance of a resin composition of polyphenylene ether and rubber-modified polystyrene resin. For example, in Japanese Patent Publication No. 57-56941, A
is a polymerized vinyl aromatic hydrocarbon block,
B increases the degree of unsaturation by hydrogenation to 10 of the initial degree of unsaturation.
To hydrogenation through diene block reduced to less than %-
A resin composition containing a B-A type block copolymer elastomer is disclosed.

There are also proposals to improve the moldability and impact resistance of polyphenylene ether by blending polyolefin with it (U.S. Pat. No. 3,361.851 and Japanese Patent Publication No. 42-70
Publication No. 69).

In addition, another proposal to improve the impact resistance of polyphenylene ether is to incorporate an ethylene/propylene/polyene copolymer (so-called EPDM) (U.S. Pat. No. 3,920,770M). Specification).

As a method for improving the impact resistance of polyamide, a resin composition comprising a polyamide and a polybutadiene elastomer is disclosed in JP-A-52-105952.
A resin composition prepared by blending a conjugated diene-monovinyl aromatic hydrocarbon block copolymer with polyamide is also disclosed in JP-A-48-89240.

For the purpose of improving the fluidity of polyphenylene ether, a resin composition comprising polyphenylene ether and polyamide is disclosed in Japanese Patent Publication No. 45-997. In addition, for the purpose of improving the solvent resistance of polyphenylene ether, a method for producing a resin composition obtained by adding a compound having a specific structure such as maleic anhydride to polyphenylene ether and polyamide and melt-kneading the mixture. is disclosed in Japanese Patent Publication No. 60-11966. Additionally, a resin composition comprising polyphenylene ether modified with a specific compound and polyamide is also disclosed in JP-A-59-66452.

Partially hydrogenated A consisting of a monoalkenyl allene terminal polymer block A and a partially hydrogenated polymer block B of a co-19 diene polymer to improve the impact resistance of a resin composition consisting of polyphenylene ether and polyamide. -B-A-
A resin composition containing a hydrogenated Prolock copolymer is also disclosed in JP-A-53-132053. Furthermore, a resin composition obtained by adding a specific compound such as maleic anhydride to polyphenylene ether, polyamide, and a rubber-like substance and melt-kneading the mixture is also disclosed in JP-A-56-49753. .

<Problems to be Solved by the Invention> However, the resin composition comprising polyphenylene ether and rubber-modified polystyrene resin described in U.S. Pat. No. 3,383,435 does not improve the moldability of polyphenylene ether. However, it cannot be said that it has sufficient impact resistance at a practical level.

In the resin composition described in JP-A-57-56941, in which a hydrogenated A-B-A type block copolymer elastomer is blended with a resin composition consisting of polyphenylene ether and rubber-modified polystyrene resin, a small amount of hydrogenated A is generally added. - When B-A type block copolymer elastomer is blended, the effect of improving impact resistance is small; on the other hand, when it is blended in a large amount, unfavorable phenomena such as poor appearance and decreased melt flow properties due to poor dispersion of the rubber-like elastomer occur. .

Polyphenylene ether and polyolefin or EP
Resin composition consisting of DM (U.S. Pat. No. 3,361,85
1 specification, 3,920°770 specification, and Japanese Patent Publication No. 42-7069), polyolefin or E
Since the compatibility between PDM and polyphenylene ether is essentially poor, phase separation is likely to occur, and the impact resistance improvement effect is not as great as expected.

Although the resin composition prepared by blending a conjugated diene-monovinyl aromatic hydrocarbon block copolymer with a polyamide described in JP-A-48-89240M has improved low impact properties, rigidity, and heat resistance, Since it contains glass fiber, it has poor moldability and also impairs the appearance of the molded product, which is undesirable.

The resin composition described in JP-A-52-105952, which is made by blending a polyamide with a polybutadiene elastomer, has improved impact resistance, but is inferior in heat resistance.

Furthermore, although the resin composition comprising poly-phenylene ether and polyamide described in Japanese Patent Publication No. 45-997 has improved fluidity, it has poor impact resistance and is not preferred.

A modified polymer made of polyphenylene ether, polyamide, and a specific compound represented by maleic anhydride produced by the method described in Japanese Patent Publication No. 60-11966 is a modified polymer made of polyphenylene ether, polyamide, and a specific compound represented by maleic anhydride. Although the impact resistance has been improved to some extent, it is still not satisfactory. Further, since polyphenylene ether and polyamide are crosslinked via a compound having a specific structure, moldability is impaired, which is not preferable.

The resin composition made of modified polyphenylene ether and polyamide described in Japanese Patent Publication No. 59-66452 had insufficient impact resistance and heat resistance, and was still unsatisfactory.

The resin composition described in JP-A-53-132053, which is made by blending polyphenylene ether and polyamide with a rubber-like substance, has slightly lower impact resistance because the polyphenylene ether is not modified with a compound having a specific structure. Although it has been improved, it is not enough.

In addition, a resin composition comprising a specific compound represented by polyphenylene ether, polyamide, a rubber-like substance, and maleic anhydride described in JP-A-56-49753 is prepared by melt-kneading polyphenylene ether, polyamide, and a rubber-like substance. Since a specific compound was added at the same time, the impact resistance was considerably improved, but it was still not satisfactory, and the heat resistance was not as high as expected.

That is, a resin with high impact resistance, high rigidity, high heat resistance, and excellent moldability has not yet been obtained, and there is currently a desire to develop a resin that has all of these properties.

As a result of extensive research aimed at developing a resin with high impact strength, flexural modulus, and heat resistance, as well as excellent moldability, the present inventors discovered that the carboxyl group and/or carboxylic acid anhydride structure has been modified as a substituent. It has been discovered that the above object can be achieved by blending polyphenylene ether, polyamide, and block copolymer elastomer in a specific ratio, and the present invention has been achieved.

<Means for solving the problem> That is, in the present invention, Q2, Q3, and Q4 are each independently composed of hydrogen, halogen, hydrocarbon, 8-day hydrocarbon, hydrocarbon oxy, and 8-day hydrocarbon oxy. (where n represents the total number of monomer units and is an integer of 20 or more), 0.1 to 20 parts by weight of carboxyl groups are added to the polyphenylene ether selected from the group consisting of Alternatively, it is obtained by reacting a 1,2-substituted olefin compound having a carboxylic acid anhydride structure in the presence of 0.1 to 30 parts by weight of a radical generator based on 100 parts by weight of the 1,2-substituted olefin compound. 5 to 90% by weight of polyphenylene ether having a carboxyl group and/or carboxylic acid anhydride structure as part of the substituents, (B) 5 to 90% by weight of polyamide, and (C) A
-B-A" type block copolymer elastomer where A, A"
are the same or different types of polymerized vinyl aromatic hydrocarbon blocks, and B is a polymerized conjugated diene block) and/or in the block copolymer elastomer, the intermediate polymer block portion B is hydrogenated. Hydrogenated A-B-A' type block copolymer elastomer (A,
(The definition of A-1B is the same as above) A thermoplastic resin composition is provided in which 5 to 60% by weight of A-1B is mixed.

The thermoplastic resin composition of the present invention comprises (A) a modified product of polyphenylene ether, (8) polyamide, and (C) A-
It is obtained by mixing a B-A-type block copolymer elastomer and/or a hydrogenated A-B-A'' type block copolymer elastomer.

The polyphenylene ether used to prepare component (A) constituting the resin composition of the present invention is preferably a homopolymer or copolymer containing one or more units represented by the above general formula.

The method for producing polyphenylene ether is not particularly limited, but
See, for example, U.S. Pat.
, 257.357 and 3,257,358
It can be produced by reaction of phenols according to the procedure described in the specification. These phenols include 2.6-dimethylphenol, 2.6-dinitylphenol, 2,6-sibutylphenol, 2.6-dilaurylphenol, 2.6-dipropylphenol,
2,6-diphenylphenol, 2-methyl-6-nitylphenol, 2-methyl-6-cyclohexylphenol, 2-methyl-6-tolylphenol, 2-methyl-6-medoxyphenol, 2-methyl-6 -butylphenol, 2,6-simethoxyphenol, 2.3.6
-trimethylphenol, 2.3.5', e-tetramethylphenol and 2,6-dinitoxyphenol.

Each of these may be reacted alone to form a corresponding homopolymer or with another phenol to form a corresponding copolymer having different units encompassed by the above formula. In particular, 2,6-dimethylphenol and the corresponding polymers, namely poly(2,6-dimethyl-1,4-phenol) ether, as well as 2.6-dimethylphenol and the corresponding phenols, e.g. ．．
Examples include combination use with 6-dolimethylphenol, 2-methyl-6-butylphenol, etc., and copolymers corresponding thereto, such as poly(2,6-dimethyl-co-2-medy-6-butyl-1,4-phenylene) ether.

Preferred specific examples of the 1,2-substituted olefin compound having a carboxyl group or carboxylic anhydride structure used in the preparation of component (A) include maleic anhydride, himic anhydride, itaconic anhydride, glutaconic anhydride, Examples include citraconic anhydride, aconitic anhydride, 5-norbornene 2-methyl-2-carboxylic acid, and phthalic acid. The amount of the 1,2-substituted olefin compound having a levoxyl group or carboxylic acid anhydride structure is 0.1 to 0.1 to 100 parts by weight of polyphenylene ether.
20 parts by weight, preferably in the range of 0.3 to 10 parts by weight. If the amount is less than 0.1 parts by weight, balanced improvements in impact strength, bending strength and heat resistance will not be observed in the resin composition comprising the modified product, polyamide and block copolymer elastomer.

In addition, the radical generator used in the preparation of component (A) includes known organic peroxides and diazo compounds, and preferred specific examples include benzoyl peroxide, dicumyl peroxide, and di-tert-butyl peroxide. , tert-butylcumyl peroxide, tert-butyl hydroperoxide, cumene hydroperoxide, azobisin butyronitrile, and the like. The amount of the radical generator used is in the range of 0.1 to 30 parts by weight, preferably 1 to 20 parts by weight, per 100 parts by weight of the 1,2-substituted olefin compound. If the amount is less than 0.1 part by weight, no improvement in performance, particularly in heat resistance and impact resistance, will be observed in the resin composition made of the obtained modified product, polyamide, and block copolymer elastomer.

(^) The following methods can be used to prepare the ingredients.

(a) Adding a radical generator and a 1,2-substituted olefin compound having a carboxyl group or carboxylic acid anhydride structure to a solution containing polyphenylene ether,
A method of stirring at a temperature of 0°C to 150°C for several tens of minutes to several hours.

(b) In a system substantially free of solvent, at 220°C to 370°C
℃ range for 20 seconds to 30 minutes, preferably 40 seconds to 5 minutes.

Method (a) is preferably adopted when existing reaction equipment and purification equipment are available, but method (b) can be modified using light equipment such as a general-purpose twin-screw extruder. It has the advantage of being able to be changed in a short time because it does not require a desolvation step or a polymer purification step.

The polyamide (8) used in the present invention includes polyamides obtained by ring-opening polymerization of lactams such as ε-cabrolactam and ω-dodecalactam, 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, etc. Polyamides derived from amino acids, ethylenediamine, tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4-/2,4°4-trimethylhexamethylenediamine, 1°3- and 1 .4-bis(aminomethyl)cyclohexane, bis(4,4”-aminocyclohexyl)methane, aliphatic, cycloaliphatic, aromatic diamines such as meta- and para-xylylene diamine and adipic acid, speric acid, sebacic acid, Dodecanniic acid, 1.3-a
and aliphatic, alicyclic, such as 1,4-cyclohexanedicarboxylic acid, isophthalic acid, terephthalic acid, dimer acid,
Examples include polyamides derived from aromatic dicarboxylic acids, copolyamides thereof, and mixed polyamides. Among these, polycaproamide (nylon 6), polyundecamide (nylon 11), polydodecanamide (nylon 12), polyhexamethylene adipamide (nylon 66), and copolyamides containing these as main components are usually used. is useful. As a method for polymerizing polyamide, generally known melt polymerization, in-phase polymerization, or a combination thereof can be employed. Furthermore, the degree of polymerization of polyamide is not particularly limited, and the relative viscosity (1 g of polymer is 98%
Dissolved in 100d of concentrated sulfuric acid and measured at 25℃) is 2.0-5
Any polyamide within the range of 0° can be selected depending on the purpose.

The block copolymer elastomer used as component (C) in the present invention is an A-B-A-type block copolymer elastomer consisting of a vinyl aromatic hydrocarbon and a conjugated diene. A' may be the same or different, and is a thermoplastic homopolymer or copolymer derived from a vinyl aromatic hydrocarbon whose aromatic moiety may be monocyclic or polycyclic. Examples of such vinyl aromatic hydrocarbons include styrene, α-methylstyrene, vinyltoluene, vinylxylene, ethylvinylxylene, vinylnaphthalene, and mixtures thereof. Intermediate polymer block B consists of a conjugated diene hydrocarbon, such as polymers derived from 1,3-butadiene, 2,3-dimethylbutadiene, isoprene, 1,3-pentadiene, and mixtures thereof. . Furthermore, the hydrogenated A-B-A" type block copolymer elastomer refers to the above-mentioned A
-B-Am type block copolymer elastomer in which the intermediate polymer block portion B is hydrogenated, and may be hydrogenated in any proportion. The block copolymer elastomer can be produced by a generally known method. For example, it can be manufactured by the method shown in US Pat. No. 3,251,905, US Pat. No. 3,231,635 @ specification, etc. Furthermore, a hydrogenated block copolymer elastomer can be produced by hydrogenating the block copolymer elastomer by the method disclosed in US Pat. No. 3,431,323.

In the thermoplastic resin composition of the present invention, the blending ratio of the modified polyphenylene ether (A), the polyamide (B), and the block copolymer elastomer is such that (8) is 5 to 90% by weight.
, preferably 15 to 80% by weight, particularly preferably 20 to 80% by weight
70% by weight, (B) from 5 to 90% by weight, preferably 10
-80% by weight, particularly preferably 15-70% by weight and (C) 5-60% by weight, preferably 8-50% by weight,
Particularly preferred is 10 to 40% by weight.

If (A) is less than 5% by weight, heat resistance and rigidity will be poor;
If it exceeds 90% by weight, impact resistance will be poor and moldability will be impaired, which is not preferable. If (B) is less than 5% by weight, moldability is poor, and if (B) is more than 90% by weight, rigidity and heat resistance are poor, which is not preferable. (C) is 5% by weight
If the content is less than 60% by weight, the impact resistance will be poor, and if the content (C) exceeds 60% by weight, the rigidity and heat resistance will not only be poor, but also the moldability will be impaired, which is not preferable.

There are no particular limitations on the method for producing the thermoplastic resin composition of the present invention, and generally known methods can be employed.

That is, after uniformly mixing the modified polyphenylene ether (^), polyamide (B), and block copolymer elastomer (C) in the form of pellets, powder, or pieces using a high-speed stirrer, sufficient kneading ability is obtained. Various methods can be employed, such as a method of melt-kneading using a single-screw or multi-screw extruder, or a method of melt-kneading using a Banbury mixer or a rubber roll machine. In addition, modified polyphenylene ether (A) and polyamide (8), polyamide (B) and block copolymer elastomer (C), modified polyphenylene ether (^) and block copolymer elastomer (C)
) etc. may be pre-kneaded in advance, and then the blending ratio may be adjusted to a predetermined ratio and kneaded.

The thermoplastic resin composition of the present invention contains polystyrene (P
S), styrene/acrylonitrile copolymer (SAN
D, polymethyl methacrylate (PMMA), styrene/methyl methacrylate/acrylonitrile copolymer, α
- methylstyrene/acrylonitrile copolymer, α-methylstyrene/styrene/acrylonitrile copolymer,
Vinyl polymers such as α-methylstyrene/methyl methacrylate/acrylonitrile copolymer, p-methylstyrene/acrylonitrile copolymer, styrene/N-phenylmaleimide copolymer, styrene/maleic anhydride copolymer, acrylonitrile - Thermoplastic resins such as butadiene-styrene terpolymer (ABS) resin, methacrylic acid resin-butadiene-styrene terpolymer (MBS) resin, AES resin, AAS resin, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, etc. Mix appropriately or use polyethylene, polypropylene,
Ethylene/propylene copolymer, ethylene/butene-1
Copolymer, ethylene/propylene/dicyclopentadiene copolymer, ethylene/propylene 15-ethylidene 2
- By appropriately mixing polyolefin rubbers such as norbornene copolymer, ethylene/propylene/1°4-hexadiene copolymer, ethylene/vinyl acetate copolymer, and ethylene/butyl acrylate copolymer, It is also possible to adjust the physical properties and characteristics to desired ones.

Depending on the purpose, pigments, dyes, glass fibers, metal fibers,
Reinforcing materials and fillers such as metal flakes and carbon fibers, heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, lubricants, plasticizers, antistatic agents, and flame retardants can be added.

The resin composition of the present invention is useful as an engineering plastic, and can be particularly used as an automobile outer panel material such as wheel caps and bodies. It can be used for various molded products that require properties such as durability or chemical resistance.

<Examples> Hereinafter, the present invention will be explained in detail using Examples and Comparative Examples. Izot impact strength is ASTM D25
6-56, Methocj A.

The heat distortion temperature was measured according to ASTM D64B-56, and the flexural modulus was measured according to ASTM D790-61. Izot impact strength and flexural modulus were measured in an absolutely dry state.

Reference Example 1 (Production of modified product (A) of polyphenylene ether) A-1: Powder of polyphenylene ether was added to 100 parts by weight of polyphenylene ether with 5 parts by weight of maleic anhydride and 10 parts by weight of maleic anhydride. 2.5 parts by weight
- Dimethyl-2,5-di(t-butylperoxy)hexyne-3 was charged into an extruder, and while degassing the generated gas from the exhaust port attached to the extruder, the extrusion temperature was 32
Extrusion was carried out at 0'C to obtain a modified polyphenylene ether (
A-1> was manufactured. 10 g of the resulting pellets were collected, pulverized into fine powder using a pulverizer, and heated under reflux for 48 hours using a Soxhlet extractor using 100 d of methanol.

The sample was then dried under reduced pressure at 90° C. for 8 hours to obtain a sample. The presence of a CO2- structure derived from the reaction with maleic anhydride in this sample was detected at 1600 nm in the Fourier integrated infrared absorption spectrum.
This was confirmed by analysis of the absorption peak at ~1800cI&-1.

A-2 = A modified polyphenylene ether (A-2) was produced in the same manner as A-1, except that itaconic anhydride was used instead of maleic anhydride as a modifier. 10 g of the resulting pellet was A-
Purification was carried out in the same manner as in the case of A-1, and the presence of a -CO2- structure derived from the reaction with itaconic anhydride was confirmed by analyzing the absorption peak of the infrared absorption spectrum in the same manner as in the case of A-1.

A-3: Pipio was prepared in the same manner as (A-1) except that 2 parts by weight of 2,5-dimethyl-2,5-di(1-butylperoxy)hexyne-3 was used based on maleic anhydride. A modified product (A-3> was produced. The resulting pellet was purified in the same manner as in the case of A-1, and 1CO2- derived from the reaction with maleic anhydride was purified in the same manner as in the case of A-1. The existence of the structure was confirmed.

A-4: 0.0% of 2,5-dimethyl-2,5-di(1-butylperoxy)hexyne-3 to maleic anhydride.
A modified polyphenylene ether (A-4>) was produced in the same manner as (A-1>) except that 7 parts by weight was used.

The obtained pellet was purified in the same manner as in the case of A-1,
The presence of a -CO2- structure derived from the reaction with maleic anhydride was confirmed in the same manner as in the case of A-1.

Reference Example 2 (Manufacture of polyamide (B)) The following nylon 6, nylon 66, and nylon 12 were manufactured by the melt polymerization method.

Nylon 6: ε-caprolactam to concentrated sulfuric acid Relative viscosity 2
．． 75 nylon 6 (B-1>) was polymerized.

Nylon 66: Nylon 66 with relative viscosity of 2.60 from concentrated sulfuric acid from equimolar salt of hexamethylene diamine and adipic acid (
B-2> was polymerized.

Nylon 12: Nylon 12 (B-3) having a relative viscosity of 2.35 was polymerized from 12-aminododecanoic acid in concentrated sulfuric acid.

Modified polyphenylene ether prepared in Example Reference Example (A
-1, A-2> and polyamides (B-1 to B-3) and the block copolymer elastomer, unsaturated polystyrene-polybutadiene-polystyrene block copolymer "Cariflex" manufactured by Shell Chemical Company (Qarif
l ex>TR-1101 (C-1> and/or
Hydrogenated polystyrene-polybutadiene-polystyrene block copolymer “Kraton” G1652 (C-
2> were mixed at the blending ratio shown in Table 1, melt-kneaded using a 30s+yφ twin-screw extruder, and then pelletized.

The extrusion temperature was 280'C. Next, this pellet was dried in vacuum, and then a test piece for measuring physical properties was molded by injection molding. During injection molding, the cylinder temperature was set at 280°C. The mold temperature was set at 80°C. The measurement results are shown in Table 1.

Comparative Example Modified polyphenylene ether produced in Reference Example (A
), polyamide CB), 1, block copolymer elastomer (C), and polyphenylene ether (hereinafter abbreviated as PPO) used as the raw material polymer in Reference Example 1 were mixed at the blending ratio shown in Table 1, and the mixture was carried out. Physical properties were measured in the same manner as in the example.

The measurement results are shown in Table 1.

The following is clear from the results of Examples and Comparative Examples.

All of the resin compositions of the present invention (Experiments Nα1 to Nα14) had high Izot impact strength, high thermal deformation temperature, and high flexural modulus, and had excellent moldability.

On the other hand, a resin composition (experiment Nα 15.16) consisting only of a modified polyphenylene ether (A) containing no polyamide and a block copolymer elastomer (C) had poor moldability.

The resin composition (experiment Nα 17.18) consisting only of the polyamide (B) and the block copolymer elastomer (C) without containing a modified polyphenylene ether had a low heat distortion temperature.

Resin compositions containing only the modified polyphenylene ether (A) and polyamide (B) that did not contain the block copolymer elastomer (experiments Nα19 to 21) had low Izod impact strength.

The resin composition containing more than 60% by weight of the block copolymer elastomer (C) (Experiment No. 022.23) had drawbacks such as low thermal deformation humidity, low flexural modulus, and poor moldability. Ta.

When polyphenylene ether not modified with a compound having a specific structure was used (experiment Nα24), the Izod impact strength was low. When a compound having a specific structure was melt-kneaded together with each component (Experiment NQ 25 > Izod impact strength and heat distortion temperature were not improved in a balanced manner).

Unmodified polyphenylene ether and polyamide (B-2
) was pre-kneaded with a compound having a specific structure and then melt-kneaded with the block copolymer elastomer (C-1> (Experiment N).
o, 26>, although the Izod impact strength was improved, it was still not sufficient and was not practical.

In addition, when unmodified polyphenylene ether and block copolymer elastomer (C-1) are pre-kneaded with a compound having a specific structure and then melt-kneaded with polyamide (B-2) (
Experiment Nα27) had low Izod impact strength.

<Effects of the Invention As explained above, the resin composition of the present invention has excellent impact resistance as represented by Izot impact strength, stiffness as represented by flexural modulus, and heat resistance as represented by heat distortion temperature. It is excellent and has good moldability.

Claims (1)

[Claims] (A) General formula ▲ Numerical formula, chemical formula, table, etc. ▼ (In the formula, Q_1, Q_2, Q_3 and Q_4 each independently represent hydrogen, halogen, hydrocarbon, halohydrocarbon, hydrocarbon 0.1 per 100 parts by weight of the polyphenylene ether selected from the group consisting of hydrogen oxy and halohydrocarbon oxy, where n represents the total number of monomer units and is an integer of 20 or more. ~20 parts by weight of a 1,2-substituted olefin compound having a carboxyl group or carboxylic acid anhydride structure is coexisting with a radical generator in an amount of 0.1 to 30 parts by weight per 100 parts by weight of the 1,2-substituted olefin compound. Polyphenylene ethers 5 to 90 having carboxyl groups and/or carboxylic acid anhydride structures as part of substituents obtained by the reaction below
% by weight, (B) polyamide 5-90% by weight and (C)
A-B-A' type block copolymer elastomer (here, A, A'
are the same or different types of polymerized vinyl aromatic hydrocarbon blocks, and B is a polymerized conjugated diene block) and/or in the block copolymer elastomer, the intermediate polymer block portion B is hydrogenated. Hydrogenated A-B-A' type block copolymer elastomer (A, A
', B definitions are the same as above) A thermoplastic resin composition consisting of 5 to 60% by weight.