Toray Industries, Inc.

Toray Plastics (malaysia) Sdn. Bhd.

Takuya Shibata

Takanori Suga

Takayuki Hase

Akira Saito

Takashi Ueda

Takamasa Owaki

Kosuke Shirotani

Yoshiyasu Naito

Masafumi Koyama

Nobuaki Shirakawa

Tadakatsu Takasaki

Taku Shimozawa

Taku Araki

Kazuaki Hirota

Nobuhiko Ota

Saburo Shioda

Noboru Watanuki

Akira Morito

A styrene-based thermoplastic resin composition includes: (A) a graft copolymer obtained by graft-polymerizing, in the presence of a conjugated-diene-based rubber, (a) a monomer mixture containing at least an aromatic vinyl-based monomer, a methacrylic acid ester-based monomer, and an acrylic acid ester-based monomer; and (B) a vinyl-based copolymer obtained by copolymerizing (b) a monomer mixture containing an aromatic vinyl-based monomer, a methacrylic acid ester-based monomer, and a vinyl cyanide-based monomer, and containing substantial no acrylic acid ester-based monomer.

Styrene-based thermoplastic resin composition, production method of styrene-based thermoplastic resin composition, molded article, and production method of molded article

A transparent thermoplastic resin composition containing: based on 100 parts by mass of the transparent thermoplastic resin composition, 10 to 60 parts by mass of a graft copolymer (A) obtained by graft copolymerizing a monomer mixture (a) containing at least an aromatic vinyl-based monomer (a1) and a (meth)acrylic acid ester-based monomer (a2) in the presence of a rubbery polymer (R); 40 to 90 parts by mass of a vinyl copolymer (B) obtained by copolymerizing a monomer mixture (b) containing at least an aromatic vinyl-based monomer (b1) and a (meth)acrylic acid ester-based monomer (b2); 100 to 1,000 ppm of a phenolic compound (C); and a dihydrooxaphosphaphenanthrene-based phosphorus compound (D), wherein a molar ratio (P/OH) of a phosphorus atom (P) of the dihydrooxaphosphaphenanthrene-based phosphorus compound (D) to a hydroxyl group (OH) of the phenolic compound (C) is 0.2 to 5.0.

Transparent thermoplastic resin composition, production method therefor, molded article obtained by molding transparent thermoplastic resin composition, and production method for molded article

A transparent thermoplastic resin composition includes: 100 parts by mass of a transparent thermoplastic resin composition composed of 10 to 60 parts by mass of a graft copolymer (A) obtained by graft-copolymerizing a monomer mixture (a) containing at least an aromatic vinyl-based monomer (a1) and a (meth)acrylic acid ester-based monomer (a2) in the presence of a rubbery polymer (r), and 40 to 90 parts by mass of a vinyl-based copolymer (B) obtained by copolymerizing a monomer mixture (b) containing at least an aromatic vinyl-based monomer (b1), a (meth)acrylic acid ester-based monomer (b2), and a vinyl cyanide-based monomer (b3); and 15 ppm or more and 40 ppm or less of a polydimethyl siloxane gum (C) having a weight-average molecular weight of 300,000 or more.

Transparent thermoplastic resin composition and article molded thereof

A thermoplastic resin composition includes a graft copolymer (A) obtained by graft copolymerization of a monomer mixture (a) that includes at least an aromatic vinyl monomer (a1) and a (meth)acrylate monomer (a2), but does not practically contain a vinyl cyanide monomer (a3), in the presence of a rubbery polymer (r) having a refractive index of not lower than 1.510 and not higher than 1.520; and a vinyl copolymer (B). An acetone insoluble component (C) of the thermoplastic resin composition does not practically contain a vinyl cyanide monomer-derived unit. An acetone soluble component (D) of the thermoplastic resin composition contains the vinyl cyanide monomer-derived unit. The content of the vinyl cyanide monomer-derived unit is not lower than 2% by mass and not higher than 20% by mass relative to 100% by mass of the acetone soluble component (D).

Thermoplastic resin composition, manufacturing method of thermoplastic resin composition, molded product and manufacturing method of molded product

A thermoplastic resin composition having an excellent moldability capable of producing a molded article having excellent chemical resistance, and in particular, an excellent chemical resistance in TD is provided. The thermoplastic resin composition of the present invention is a thermoplastic resin composition produced by blending 40 to 90 parts by weight of a vinyl copolymer (A) prepared by copolymerization of a vinyl monomer mixture (a) comprising at least 5 to 40% by weight of an aromatic vinyl monomer (a1), 30 to 80% by weight of an unsaturated alkyl carboxylate ester monomer (a2), and 10 to 50% by weight of a cyanated vinyl monomer (a3) and 10 to 60 parts by weight of a graft copolymer (B) prepared by graft copolymerization of a vinyl monomer mixture (b) comprising at least 10 to 30% by weight of an aromatic vinyl monomer (b1), 30 to 80% by weight of an unsaturated alkyl carboxylate ester monomer (b2), and 1 to 10% by weight of a cyanated vinyl monomer (b3) in the presence of a rubbery polymer (r); wherein acetone-soluble content (C) of the thermoplastic resin composition has a number average molecular weight of 65,000 to 90,000.

Thermoplastic resin composition, method for producing same, and molded article of same

A natural rubber-containing thermoplastic resin composition includes a graft copolymer (A) obtained by graft-polymerizing a vinyl monomer mixture (a) including at least an aromatic vinyl monomer to a rubbery polymer (R) composed of 10 to 70% by mass of a natural rubber having a weight average particle size of 0.3 to 1.2 &#x3bc;m and 30 to 90% by mass of a synthetic rubber having a weight-average particle size of 0.2 to 0.4 &#x3bc;m, wherein particles of the natural rubber include not less than 5% by mass of natural rubber articles with a size of 1.0 &#x3bc;m or larger; and particles of the rubbery polymer (R) with a size of 1.0 &#x3bc;m or larger have an internal graft ratio of 20% or higher.

Natural rubber-containing thermoplastic resin composition and molded article thereof

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Ichihara, Japan

Takuya Shibata