Idemitsu Petrochemical Co., Ltd.

Idemitsu Kosan Company, Limited

Akihiko Okada

Nobuyuki Sato

Nobuyuki Satoh

Akitoshi Masuyama

Shinji Chino

Takuma Aoyama

Hiroki Fukui

Yusuke Otsuki

Keisuke Funaki

Shuji Machida

Takaaki Uchida

Koji Matsukawa

Styrene resin composition and method of manufacturing the same, and method of manufacturing styrene resin molded products

There are disclosed a molding material which is used for molding a styrenic polymer and which is capable of affording moldings that are excellent in solvent resistance and mechanical strength even when produced at a molding temperature almost same as that of ordinary atactic polystyrene, namely at a resin temperature of 260&deg; C. or lower, dispensing with a melt kneading step; a process for producing a molding by molding the above molding material, which process enables to shorten molding cycle time and curtail the producton cost; and the moldings produced thereby. The molding material comprises a dry blend of 10 to 95% by weight of a (A) styrenic polymer having atactic configuration and 2 to 90% by weight of a (B) styrenic polymer having a melting point of 250&deg; C. or lower, a weight average molecular weight of at most 200,000 and mainly syndiotactic configuration.

Molding material, process for producing molded article, and molded article

Disclosed is a syndiotactic, polystyrenic resin composition comprising (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a styrene-olefin copolymer having a styrene content of from 40 to 85% by weight, and optionally (C) from 0.5 to 10.0 parts by weight, relative to 100 parts by weight of the component (a) of (A), of a polyphenylene ether (having an intrinsic viscosity in chloroform at 25&deg; C. of 0.4 dl/g or higher) and/or (D) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of a styrene-olefin copolymer having a styrene content of from 5 to 35% by weight and/or (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of at least one selected from paraffinic oils, paraffinic waxes, mineral oils and siloxanic oils. The composition may optionally contain (F), from 0.5 to 350 parts by weight, relative to 100 parts by weight of the resin components, of an inorganic filler and (G) from 0.1 to 10 parts by weight, relative to the same, of a polymer which is miscible with or has an affinity for the component (a) of (A) and which has a polar group. The composition can be formed into articles having good heat resistance, a high modulus of elasticity and good toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.

Styrene-based resin composition

A plated molded article which comprises a molded article formed with a resin composition comprising specific relative amounts of (A) a styrenic polymer having a syndiotactic configuration and (B) at least one selected from the group consisting of (a) rubbery elastomers soluble in an oxidizing agent, (b) thermoplastic resins soluble in an oxidizing agent, and (c) inorganic compounds soluble in an oxidizing agent, and has been plated; and a process for producing the plated molded article. A plated molded article containing a styrenic polymer having a syndiotactic configuration which suppresses skipped plating and has a high adhesive strength of the plating film can efficiently be obtained with stability in an industrial process.

Plated molded article and process for producing a plated molded article

Disclosed is a syndiotactic, polystyrenic resin composition comprising (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a styrene-olefin copolymer having a styrene content of from 40 to 85% by weight, (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of at least one selected from paraffinic oils, paraffinic waxes, mineral oils and siloxanic oils. The composition can be formed into articles having good heat resistance, a high modulus of elasticity and good toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.

Styrene-based syndiotactic resin composition

Battery jar material for sealed secondary battery and battery jar for

The present invention relates to an impact resistant polystyrene composition which comprises 5 to 97% by weight of an (a) styrenic polymer having syndiotactic configuration, 2 to 95% by weight of a (b) rubbery elastomer having an olefinic component or a polyolefin, 0.5 to 10% by weight of a (c) styrene/olefin block or graft copolymer having a micro-phase separation temperature of 180.degree. C. at the highest when diluted with dioctyl phthalate to a solution with a concentration of 60% by weight and 0.5 to 5% by weight of (d) poly(phenylene ether); according to the present invention, an impact resistant polystyrene composition can be provided which is greatly enhanced in impact resistance and extensibility without impairing heat resistance and modulus of elasticity.

Impact modified syndiotactic polystyrene blend

Disclosed is a syndiotactic, polystyrenic resin composition comprising (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 40 to 85% by 'weight, and (C) from 0.5 to 10.0 parts, relative to 100 parts by weight of component (a) of (A), of a polyphenylene ether. The '. composition can be formed into articles having good heat resistance, a high modulus of elasticity and good toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.

Blends comprising a syndiotactic polystyrene and a polyphenylene ether

Polystyrenic resin composition and molded article thereof

There is disclosed an impact resistant polystyrene composition which comprises 5 to 98% by weight of an (a) styrenic polymer having a syndiotactic configuration and 2 to 95% by weight of a (b) styrene/diolefin diblock copolymer, styrene/diolefin/styrene triblock copolymer or styrene/diolefin random compolymer, each having a hydrogenation rate of 70 to 98 mol %, and optionally a (c) rubbery elastomer having an olefinic component or polyolefin, a (d) poly(phenylene ether), etc. The above composition is greatly enhanced in its impact resistance and elongation properties without deterioration of heat resistant stability of color tone, etc.

Impact resistant polystyrene composition

Process for producing acid-modified polyphenylene ether and polystyrenic

There are disclosed a thermoplastic resin composition which comprises a styrenic resin comprising a modified styrenic polymer in which a compound having an unsaturated group and a polar group is bonded to the skeleton of a styrenic polymer having syndiotactic configuration (SPS) or to an end or an intermediate position of a substituent of the SPS, or the mixture of the above modified styrenic polymer and an unmodified SPS; and an inorganic filler, as well as a thermoplastic resin composition which comprises the aforesaid styrenic resin; and an other thermoplastic resin. The compositions are excellent in water resistance, impact resistance, heat resistance, modulus of elasticity and dynamical properties and capable of improving the adhesiveness to the inorganic filler or compatibility with the other resin without impairing the crystallization of the SPS and deteriorating the long-term heat resistant stability of the compositions.

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Ichihara, Japan

Akihiko Okada