JPH0959508A - Polyphenylene ether resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyphenylene ether resin composition which is excellent in melt fluidity, moldability, additionally in heat resistance and is useful as an engineering plastics by adding a specific hydrogenated aromatic resin to a polyphenylene ether resin. SOLUTION: This resin composition comprises (A) 1-100 pts.wt. of a polyphenylene ether resin, (B) 99-0 pt.wt. of polystyrene resin and (C) a hydrogenated aromatic resin in which 30-100% of the aromatic rings are hydrogenated (preferably the hydrogenated product of 9C hydrocarbon resin or styrene polymer) where the content of the component C is 0.1-100 pts.wt. per 100 pts.wt. of the total of components A and B. As a composition A, is preferably used a polymer of the formula (R<1> to R<4> are each H, an alkoxy, a halogen, phenyl; n is the degree of polymerization).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyphenylene ether resin composition.

[0002]

2. Description of the Related Art Polyphenylene ether resins are excellent in various properties such as heat resistance and rigidity and are attracting attention as engineering plastics. However, their high melt viscosity requires high temperatures for melt molding. However, various problems such as discoloration, oxidation and deterioration occur. Therefore, conventionally, polyphenylene ether resins have been put to practical use as a composition in which a polystyrene resin is blended to improve molding processability (for example, US Pat. No. 3,383,435). However, it is difficult to say that the melt fluidity of a resin composition containing such a polystyrene resin is sufficient.

Therefore, various measures have been taken in order to improve the melt fluidity of the polyphenylene ether resin composition. For example, JP-A-55-118916, JP-B-57-13584 and JP-A-58-12.
9050, JP-A-58-129051, JP-A-59-126460, JP-A-47-3136.
Japanese Patent Laid-Open Publication No. 2004-242242 discloses that a low molecular weight hydrocarbon resin such as rosin, aromatic petroleum resin, cyclopentadiene resin, aromatic / cyclopentadiene copolymer resin or coumarone-indene resin is added to a polyphenylene ether resin composition. It has been proposed that an improvement in melt flowability is recognized. However, the addition of the low molecular weight hydrocarbon resin has a drawback that the heat resistance originally possessed by the obtained polyphenylene ether resin cannot be satisfied.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a polyphenylene ether resin composition having excellent melt fluidity, moldability and heat resistance.

[0005]

As a result of intensive studies to solve the above-mentioned problems of the prior art, the present inventors have found that a composition comprising a polyphenylene ether-based resin and a polystyrene-based resin can be further hydrogenated in a specific manner. The inventors have found that a composition obtained by adding an aromatic resin meets the above-mentioned object, and have completed the present invention.

That is, the present invention comprises 1 to 100 parts by weight of the polyphenylene ether resin (A) and 99 to 0 parts by weight of the polystyrene resin (B), and 30 to 100% of the aromatic ring.
A polyphenylene ether which is composed of a hydrogenated aromatic resin (C) obtained by hydrogenating a compound and has a content of (C) of 0.1 to 100 parts by weight based on 100 parts by weight of the total of (A) and (B). A resin composition.

The hydrogenated aromatic resin (C) used in the present invention is a hydride of an aromatic resin. Examples of aromatic resins include C9 hydrocarbon resins, C5 / C9
-Based hydrocarbon resin, coumarone-indene resin, terpene-
Examples thereof include styrene resins and styrene polymers. In the present invention, among these hydrogenated aromatic resins, the content of aromatics in the resin is high and the compatibility with the polyphenylene ether resin (A) and the polystyrene resin (B) is good, and heat coloring, etc. It is preferable to use a hydride of a C9-based hydrocarbon resin or a styrene-based polymer because it is less likely to be deteriorated by heat.

Here, the C9 hydrocarbon resin means a C9 fraction obtained by cracking naphtha (for example, styrene,
(Indene, vinyltoluene, α-methylstyrenes, etc.)
Means a petroleum resin obtained by cationically polymerizing. Hydrogenated C
The 5 / C9 hydrocarbon resin means a petroleum resin obtained by copolymerizing a C9 fraction and a C5 fraction (for example, isoprene, pentadiene, cyclopentadiene, dicyclopentadiene, etc.) obtained by cracking naphtha. . The coumarone-indene resin is generally a thermoplastic resin obtained by copolymerizing coumarone, indene, styrene, etc. contained in solvent naphtha (boiling point 150 to 200 ° C), which is a light fraction in coke oven gas, as a raw material oil. Refers to resin.
The terpene-styrene resin is a resin obtained by copolymerizing terpene-based polymerization components such as pinene, dipentene, and limonene with styrene at an arbitrary ratio. The styrene-based polymer refers to a so-called pure monomer resin obtained by polymerizing a pure monomer such as styrene, vinyltoluene, α-methylstyrene, dimethylstyrene, and isopropenyltoluene by cationic polymerization or radical polymerization.

The hydrogenated aromatic resin (C) used in the present invention is 30 to 100 of the aromatic ring of the aromatic resin.
% Is hydrogenated. Preferably 50 to 50 aromatic rings
98% hydrogenated. Hydrogenation rate of aromatic ring is 3
If it is less than 0%, the residual ratio of aromatic rings in the resin increases,
The heat resistance of the polyphenylene ether resin composition cannot be sufficiently improved. When at least 30% of the aromatic rings are hydrogenated, the olefinic double bond of the hydrogenated aromatic resin is generally completely hydrogenated.

The hydrogenated aromatic resin (C) of the present invention
The softening point of is preferably about 80 to 180 ° C. More preferably, it is 100-160 degreeC. Softening point is 180 ° C
If it exceeds, the melt viscosity becomes high, and the melt fluidity of the obtained polyphenylene ether resin composition cannot be sufficiently improved. On the other hand, when the softening point is less than 80 ° C,
It lowers various properties such as heat resistance and rigidity which the polyphenylene ether resin originally has. The molecular weight of the hydrogenated aromatic resin (C) of the present invention is not particularly limited, but it is preferably in the range satisfying the above softening point, and generally, the number average molecular weight of about 500 to 30,000 is used. It

Such a hydrogenated aromatic resin (C) of the present invention is obtained by hydrogenating the aromatic resin in the presence of a hydrogenation catalyst by a generally known method. It can be manufactured.

As the hydrogenation catalyst, various kinds of metals such as nickel, palladium, platinum, cobalt, rhodium, ruthenium and molybdenum, or metal compounds such as oxides and sulfides thereof can be used. Such a hydrogenation catalyst may be used by being supported on a porous carrier having a large surface area such as alumina, silica, diatomaceous earth, carbon, or titania.
In the present invention, among these catalysts, it is preferable to use a nickel-diatomaceous earth catalyst from the viewpoint of easily adjusting the hydrogenation rate of the aromatic ring within the above range and from the viewpoint of cost. The amount of the catalyst used is about 0.1 to 5% by weight, preferably 0.1 to 3% by weight, based on the aromatic resin as the raw material. 0.
If less than 1% by weight, hydrogenation is difficult to proceed and 5% by weight
It is economically disadvantageous to exceed.

The conditions of the hydrogenation reaction may be appropriately adjusted so that the hydrogenation rate of the aromatic resin falls within the above range.
Usually, hydrogen pressure is about 10 to 300 kg / cm ² , preferably 30 to 200 kg / cm ² , and reaction temperature is 15
Range of about 0 to 330 ° C, preferably 200 ° C to 290 ° C
Range. When the hydrogen pressure is less than 10 kg / cm ² or the reaction temperature is less than 150 ° C., hydrogenation is difficult to proceed. When the hydrogen pressure exceeds 300 kg / cm ² or the reaction temperature exceeds 330 ° C. The decomposition reaction of the resin is likely to occur, resulting in a decrease in softening point and a decrease in yield, which is not preferable in any case. The reaction time is usually about 0.5 to 7 hours, preferably 2 to 7 hours.

Regarding the amount of the catalyst used and the reaction time, the case of using the batch system as the reaction system has been described, but the reaction system is not limited to the batch system.
A flow type (fixed bed type, fluidized bed type, etc.) can be adopted as the reaction type. Further, the hydrogenation reaction can be performed in a state where the aromatic resin is melted or dissolved in a solvent. Examples of the solvent include cyclohexane, n-hexane, n-heptane, decalin and the like.

As the polyphenylene ether resin (A) of the present invention, known resins can be used. For example, general formula (1):

[0016]

Embedded image

(Wherein R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom, an alkyl group, an alkoxy group,
A polymer represented by a halogen atom or phenyl, and n is an integer representing the degree of polymerization.

The method for producing the polymer represented by the above general formula (1) is not particularly limited, and for example, US Pat.
The phenols may be reacted according to the method described in US Pat. No. 4, U.S. Pat. No. 3,257,357 or US Pat. No. 3,257,358. As phenols,
For example, 2,6-dimethylphenol, 2,6-diethylphenol, 2,6-dipropylphenol, 2,
6-dibutylphenol, 2,6-dilaurylphenol, 2,6-diphenylphenol, 2-methyl-6-
Ethylphenol, 2-methyl-6-cyclohexylphenol, 2-methyl-6-tolylphenol, 2-methyl-6-methoxyphenol, 2-methyl-6-butylphenol, 2,6-dimethoxyphenol, 2,
Examples include 3,6-trimethylphenol, 2,3,5,6-tetramethylphenol, 2,6-diethoxyphenol and the like. The polymer represented by the general formula (1) is
The phenol may be a polymer of one kind alone or a copolymer of two or more kinds combined.

Specific preferred examples of the polymer represented by the above general formula (1) include R ¹ and R ² each having 1 to 4 carbon atoms.
An alkyl group or a phenyl group of R ³ and R ^3
4 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. For example, poly (2,6-dimethyl-
1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2-methyl-6-ethyl-1,4-phenylene) ether, poly (2-methyl-6-) Propyl-1,4-phenylene) ether, poly (2,6-propyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1,
4-phenylene) ether, poly (2,6-diphenyl-1,4-phenylene) ether and the like can be mentioned. Further, a copolymer containing a part of alkyl tri-substituted phenol, for example, 2,3,6-trimethylphenol in the polyphenylene ether repeating unit may be used.

The polyphenylene ether resin (A) may be a copolymer obtained by grafting a styrene compound on the polymer represented by the general formula (1). The styrene compound-grafted polyphenylene ether refers to a copolymer obtained by graft-polymerizing a styrene compound such as styrene, α-methylstyrene, vinyltoluene, and chlorostyrene to the above polyphenylene ether resin.

The weight average molecular weight of the polyphenylene ether resin (A) is not particularly limited, but usually the weight average molecular weight is 1,000 to 300,000.
Degree, preferably 1000 to 100,000, and an intrinsic viscosity of 0.005 to 3 dl / g (chloroform, 25
C.), preferably 0.005 to 1 dl / g.

As the polystyrene resin (B) of the present invention, known resins may be used. Specifically, the general formula (2):

[0023]

Embedded image

(In the formula, R ⁵ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R ⁶ represents a halogen atom or an alkyl group having 1 to 4 carbon atoms, and p represents an integer of 0 to 5). , And q is an integer representing the degree of polymerization),
It has at least 25% by weight in the polymer of repeating structural units derived from an aromatic vinyl compound.

Specific examples of such polystyrene resin (B) include styrene, vinyltoluene, and α-.
A homopolymer using one kind of an aromatic vinyl compound such as methylstyrene, α-methyl-p-methylstyrene, chlorostyrene, and bromostyrene, a copolymer combining two or more kinds thereof, or an aromatic vinyl compound Polymers such as butadiene, isoprene, homopolymers of conjugated diene compounds such as chloroprene, copolymers of conjugated diene compounds and unsaturated nitrile compounds or aromatic vinyl compounds, and various rubber components such as natural rubber. Examples include modified products. In the present invention, among these polystyrene-based resins (B), it is preferable to use polystyrene or rubber-reinforced polystyrene composed of 70% by weight or more of styrene and 30% by weight or less of diene rubber. In addition,
The polystyrene resin (B) is obtained by emulsion polymerization, suspension polymerization, bulk polymerization, or solution polymerization.

The weight average molecular weight of the polystyrene resin (B) is not particularly limited, but the weight average molecular weight is usually about 1,000 to 1,000,000.

The polyphenylene ether resin composition of the present invention comprises polyphenylene ether resins (A) 1-10.
0.1 to 100 parts by weight of the hydrogenated aromatic resin (C) is blended with 100 parts by weight of 0 parts by weight and 99 to 0 parts by weight of the polystyrene resin (B).

The blending ratio of the polyphenylene ether resin (A) and the polystyrene resin (B) is preferably
Polystyrene resin (B) is 90 to 5 parts by weight with respect to 10 to 95 parts by weight of polyphenylene ether resin (A).

The blending amount of the hydrogenated aromatic resin (C) is preferably 0.1 to 50 with respect to 100 parts by weight of the total of the polyphenylene ether resin (A) and the polystyrene resin (B). Parts by weight. If the blending amount of the hydrogenated aromatic resin (C) is less than 0.1 parts by weight, the melt fluidity cannot be improved, while if it exceeds 100 parts by weight, the heat resistance originally possessed by the polyphenylene ether resin, It deteriorates various performances such as rigidity, which is not preferable in any case.

The polyphenylene ether resin composition of the present invention contains 70 parts by weight per 100 parts by weight of the polyphenylene ether resin (A) and the polystyrene resin (B) in order to improve impact strength. Hereafter, the proportion is preferably 50 parts by weight or less, and if necessary, the following optional components can be included. Examples of optional components include polyethylene, polypropylene, ethylene / propylene copolymers, ethylene / butene-1 copolymers, ethylene / propylene / dicyclopentadiene copolymers, ethylene / propylene / 5-ethylidene-2-norbornene copolymers. Polymer, ethylene / propylene / 1,4 hexadiene copolymer, ethylene / vinyl acetate copolymer, ethylene /
Butyl acrylate copolymer, ethylene / α, β-unsaturated carboxylic acid and acid anhydride copolymer, ethylene / α, β-
Grafts obtained by polymerizing a vinyl monomer mixture containing methacrylic acid methyl and acrylonitrile as essential components in the presence of an olefin rubber such as an unsaturated carboxylic acid glycidyl ester copolymer or a diene rubber-like polymer. Copolymer, A-B-A 'type block copolymer which is a vinyl-based hydrocarbon block in which A and A'are polymerized and B is a conjugated diene block in which B is polymerized, and its diene block B part is hydrogenated Hydrogenated AB
Examples thereof include -A 'type block copolymers.

Further, the polyphenylene ether resin composition of the present invention contains various known additives other than the above-mentioned components, for example, reinforcing materials and fillers such as pigments and dyes, glass fibers, metal fibers, metal flakes, carbon fibers and the like. Materials, heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, plasticizers, plasticizers, antistatic agents, flame retardants and the like can be added.

The method for producing the polyphenylene ether resin composition of the present invention is not particularly limited, and a generally known method can be adopted. That is, pelletized, powdered or crushed polyphenylene ether resin (A), polystyrene resin (B) and hydrogenated aromatic resin (C)
, Using a high-speed stirrer or the like, after uniform mixing, various methods such as a method of melt-kneading with a single-screw or multi-screw extruder having sufficient kneading ability, or a method of melt-kneading using a Banbury mixer or a rubber roll machine. The method can be adopted.

[0033]

According to the present invention, it is possible to provide a polyphenylene ether resin composition which is excellent in melt flowability, moldability and heat resistance. The polyphenylene ether-based resin composition of the present invention can be used as an engineering plastic in automobile parts, electronic / electrical device parts and their manufacturing processes, and is required to have rigidity, heat resistance, dimensional stability and the like. It can be used for various molded products.

[0034]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Production Example 1 (Production of hydrogenated C9 hydrocarbon resin) C9 hydrocarbon resin having a softening point of 140 ° C. (Mitsui Petrochemical Co., Ltd., trade name Petrosin PR140) 500 g, nickel-diatomaceous earth catalyst (JGC) Made by Kagaku Co., Ltd., product name N
113) 15 g was charged into a 1-liter rotary stirring type autoclave, and hydrogenation reaction was carried out under the conditions of hydrogen pressure of 200 kg / cm ² , reaction temperature of 260 ° C. and reaction time of 6 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, the resulting hydrogenated C9 hydrocarbon resin was taken out from the autoclave, dissolved in 3 liters of cyclohexane, and the catalyst was filtered off. Then, cyclohexane was distilled off from the obtained colorless varnish, and finally, a vacuum distillation treatment was carried out for 20 minutes under a heated reduced pressure condition of 220 ° C. and 15 mmHg to obtain a hydrogenated C9 hydrocarbon resin (softening point 140 C., a color tone of 50 Hazen, and an aromatic ring hydrogenation rate of 95%) were obtained. The resulting hydrogenated C9-based hydrocarbon resin is referred to as compound (a).

The aromatic ring hydrogenation rate was calculated by measuring a proton nuclear magnetic resonance spectrum ( ¹ H-NMR). That is, deuterium-substituted chloroform (CDCl ₃ ) having the same concentration as that of the raw material resin (C9 hydrocarbon resin) and the obtained hydrogenated aromatic resin (hydrogenated C9 hydrocarbon resin)
A solution was prepared, ¹ H-NMR was measured, and calculated from the H-spectral area of the aromatic ring appearing at around 7 ppm based on the following formula. Aromatic ring hydrogenation rate = {1- (spectrum area of hydrogenated resin / spectrum area of raw material resin)} × 10
0 (%). The softening point was determined by the ring and ball method of JIS K2531.

Production Example 2 (Production of hydrogenated C9 hydrocarbon resin) C9 hydrocarbon resin having a softening point of 140 ° C. (Mitsui Petrochemical Co., Ltd., trade name Petrosin PR140) 500 g, nickel-diatomaceous earth catalyst (JGC) Made by Kagaku Co., Ltd., product name N
113) 5 g was charged into a 1 liter rotary stirring type autoclave, hydrogen pressure was 200 kg / cm ² , reaction temperature was 260.
The hydrogenation reaction was carried out under the conditions of a temperature of 5 ° C. and a reaction time of 5 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, the resulting hydrogenated C9 hydrocarbon resin was taken out from the autoclave, dissolved in 3 liters of cyclohexane, and the catalyst was filtered off. Then, cyclohexane was distilled off from the obtained colorless varnish, and finally, vacuum distillation treatment was carried out for 20 minutes at 220 ° C. under heating and reduced pressure conditions of 15 mmHg to obtain a hydrogenated C9-based hydrocarbon resin (softening point 136 C., color tone 50 Hazen, aromatic ring hydrogenation ratio 67%) 480 g was obtained. Hydrogenated C obtained
The 9-based hydrocarbon resin is referred to as compound (b).

Production Example 3 (Production of styrene polymer hydride) 500 g of styrene homopolymer resin having a softening point of 113 ° C., nickel-diatomaceous earth catalyst (trade name N1 manufactured by JGC Chemical Co., Ltd.)
13) Charge 15 g into a 1 liter rotary stirring type autoclave, hydrogen pressure 200 kg / cm ² , reaction temperature 250
The hydrogenation reaction was carried out under the conditions of a temperature of 5 ° C. and a reaction time of 5 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, the obtained hydride of the styrene polymer was taken out from the autoclave, dissolved in 3 liters of cyclohexane, and the catalyst was filtered off. Then
Cyclohexane was distilled off from the obtained colorless varnish, and finally, a vacuum distillation treatment was carried out for 20 minutes under a heated reduced pressure condition of 220 ° C. and 15 mmHg to obtain a hydride of the styrene polymer (softening point 137 ° C., 480 g of a color tone of 150 Hazen and an aromatic ring hydrogenation rate of 75% was obtained. The hydride of the obtained styrene polymer is referred to as compound (c).

Production Example 4 (microhydrogenated C9 hydrocarbon resin) 500 g of a C9 hydrocarbon resin having a softening point of 140 ° C. (Petrosin PR140, trade name, manufactured by Mitsui Petrochemical Co., Ltd.), nickel-diatomaceous earth catalyst (JGC Chemical) Co., Ltd., product name N
113) 2.2 g was charged into a 1 liter rotary stirring type autoclave, hydrogen pressure was 200 kg / cm ² , reaction temperature was 2
The hydrogenation reaction was carried out under the conditions of 70 ° C. and a reaction time of 5 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, the obtained slightly hydrogenated C9 hydrocarbon resin was taken out from the autoclave, dissolved in 3 liters of cyclohexane, and the catalyst was filtered off. Then, cyclohexane was distilled off from the obtained colorless varnish, and finally, vacuum distillation treatment was carried out for 20 minutes at 220 ° C. under heating and depressurizing conditions of 15 mmHg to give a slightly hydrogenated C
478 g of 9-type hydrocarbon resin (softening point 133 ° C., color tone 300 Hazen, aromatic ring hydrogenation ratio 7%) was obtained. The resulting slightly hydrogenated C9 hydrocarbon resin is referred to as compound (d).

Examples 1 to 3 Polyphenylene ether resin (A) {intrinsic viscosity [η]
(Chloroform, 25 ° C.) 0.48 dl / g poly (2,6-dimethyl-1,4-phenylene) ether}
70 parts by weight (hereinafter simply referred to as "part"), polystyrene resin (B) {rubber modified polystyrene, manufactured by Mitsubishi Chemical Corporation,
30 parts of the product name HT644} and the hydrogenated aromatic resin (C) shown in Table 1 are blended with the components in the amounts (parts) shown in Table 1, mixed in a blender, and melt-kneaded through a twin-screw extruder. Then, it was pelletized.

Comparative Example 1 Pelletization was carried out in the same manner as in Example except that the hydrogenated aromatic resin (C) was not used.

Comparative Examples 2 to 6 Pelletization was carried out in the same manner as in Examples except that the hydrogenated aromatic resin (C) was replaced with the various resins shown in Table 1.

The pelletized polyphenylene ether resin compositions obtained in Examples or Comparative Examples were subjected to the following tests. The results of these evaluations are shown in Table 1.

(Melting Fluidity) Melt viscosity (300 ° C.) was measured using the pellets obtained in Examples or Comparative Examples. In addition, the numerical value is 100 (measured value 5200 p) in Comparative Example 1 (when no hydrogenated aromatic resin (C) is added).
s) is used as a relative value. That is, the value is 100
If the value is larger than 100, the melt viscosity is high and the melt fluidity is poor, and if the value is smaller than 100, the melt viscosity is low and the melt fluidity is good.

(Heat Resistance) The pellets obtained in Examples or Comparative Examples were injection molded at a mold temperature of 70 ° C. by an injection molding machine set at a cylinder temperature of 250 to 300 ° C. Heat resistance is 120 under stress of 18.6 kg / cm ^2.
It was judged whether or not deformation occurred at ° C. If the deformation occurred, the heat resistance was evaluated as ×, and if the deformation did not occur, the result was evaluated as ○.

From Table 1, it can be seen that the compositions of Examples 1 to 3 have better melt flowability and heat resistance than the compositions of Comparative Examples 1 to 6. The composition of Comparative Example 1 had poor melt flowability because no hydrogenated aromatic resin (C) was added, and the compositions of Comparative Examples 2 to 6 contained the hydrogenated aromatic resin (C) of the present invention. The heat resistance is poor because other resin is added. Comparative Example 2 also has poor melt flowability.

[0047]

[Table 1]

In Table 1, compound (e) is a hydrogenated C5 petroleum resin (Maruzen Petrochemical Co., Ltd., trade name Marcarets H5).
05, softening point 101 ° C.), compound (f) is coumarone-indene resin (manufactured by Nippon Steel Chemical Co., Ltd., trade name Esclon V)
120, softening point 120 ° C.), compound (g) is C9 hydrocarbon resin (Mitsui Petrochemical Co., Ltd., trade name Petrosin P
R140, softening point 140 ° C.), and compound (h) is a styrene homopolymer resin (softening point 113 ° C.).

Claims (2)

[Claims] 1. A polyphenylene ether resin (A) 1
-100 parts by weight and polystyrene resin (B) 99-0
And hydrogenated aromatic resin (C) in which 30 to 100% of the aromatic ring is hydrogenated, and the content of (C) is 100 parts by weight of the total of (A) and (B). 0.1-
100 parts by weight of a polyphenylene ether resin composition. 2. The polyphenylene ether resin composition according to claim 1, wherein the hydrogenated aromatic resin (C) is a C9 hydrocarbon resin or a hydride of a styrene polymer.