Idemitsu Petrochemical Co., Ltd.

Idemitsu Kosan Company, Limited

Takaaki Uchida

Keisuke Funaki

Komei Yamasaki

Masami Kogure

Akitoshi Masuyama

Akihiko Okada

Tomoaki Takebe

Takuma Aoyama

Ryosuke Kondo

There is provided a polystyrene resin composition including: (A) a polyamide; (B) a polystyrene resin having a syndiotactic structure; (C) a compatibilizer which has a polar group reactive with the polyamide (A), and which is compatible with the polystyrene resin (B); (D) a particular hindered phenol compound; and (E) an inorganic filler, wherein the amount of the polystyrene resin (B) is 10.0 to 30.0% by weight, and the amount of the hindered phenol compound (D) is 0.3 to 1.0% by weight per 100% by weight of the total amount of the components (A) to (E).

Polystyrene resin composition

The invention relates to a styrene resin material, especially a styrene-based resin composition having good high-speed castability and good spreadability and favorable to extrusion molding lines. Of the styrene-based resin material, the product of the melt index (MI, g/10 min) and the melt tension (MT, g) measured under a specific condition is at least 20. Concretely, for example, it is a styrene-based resin composition comprising (A) from 35 to 95% by weight of a styrenic polymer having a syndiotactic structure, (B) from 5 to 50% by weight of a specific polyethylenic resin, and (C) from 0 to 15% by weight (including 0) of a specific styrene-olefin copolymer.

Styrene resin material

There is disclosed a styrenic resin composition which comprises 70 to 99.9% by weight of an (A) styrenic polymer having a high degree of syndiotactic configuration and 0.1 to 30% by weight of a (B) organic compound having a --NH-- group and a molecular weight of less than 10,000. According to the present invention, there is obtained a styrenic resin composition having a syndiotactic configuration which is improved in electrical insulating properties, especially in withstand voltage against direct current.

Syndiotactic styrenic resin composition

Polystyrenic stretched film and process for producing the polystyrenic

Styrenic resin composition and polystyrene oriented film

Polystyrenic stretched film, process for producing said film,

Styrenic polymer and molded article

There are disclosed a styrenic resin molding having a high crystallinity and excellent in heat resistance, solvent resistance and transparency, and a process for producing the same. Specifically the present invention provides an orientable or thermoformable non-oriented styrenic resin molding having a crystallinity of 25% or more, a spherulite radius of 10 .mu.m or less and a haze of 5% or less and comprising a styrenic polymer having a high degree of syndiotactic configuration; a process for producing the above non-oriented molding; a transparent styrenic-resin molding having a crystallinity of 30% or more which is obtained by thermoforming or orienting the above non-oriented molding at an expansion ratio by area of 1.2 or more; and the process for producing the same. The styrenic resin molding of the present invention can be effectively utilized as heat-resisting transparent sheet, medical treatment container, microwave-range container, food package container such as hot packing container, oven container, retort container, etc., and heat-resisting transparent container such as heat-resisting bottle.

Styrenic resin molding and process for producing same

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Ichihara, Japan

Takaaki Uchida