Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Yuichiro Fujikawa

Ayaka Wakita

Shinji Matsuoka

Sohei Ueki

Toshihiro Kasai

Mitsufumi Nodono

Haruo Sasaki

Atsushi Kuwahara

Hiroaki Otonari

Disclosed is an impact strength modifier (&#x3b1;) for a chlorine-containing resin, comprising a powder of a graft copolymer (A) obtained by graft polymerizing one or more kinds of vinyl monomers (b1) onto a polyorganosiloxane rubber (A1) or a composite rubber (A2) containing a polyorganosiloxane rubber and a polyalkyl(meth)acrylate rubber, wherein the specific surface area of the powder of the graft copolymer (A) measured by a nitrogen gas adsorption method is from 0.6 to 30 m/g, and the pH of water used for extraction under conditions, in which (1) in an oven at 180&#xb0; C., 5.0 g of the powder of the graft copolymer (A) is left to stand still and heated for 15 minutes, and (2) after the heating, the powder is dispersed in 100 ml of heated pure water and extracted for 1 hour at 70&#xb0; C. while stirring, is from 4 to 11.

Impact strength modifier for chlorine-containing resin, chlorine-containing resin composition and molded body of chlorine-containing resin composition

A graft copolymer capable of providing impact resistance, flame retardance, and color rendering properties to a thermoplastic resin is described. The graft copolymer contains a polyorganosiloxane, and is obtained by graft-polymerizing vinyl monomers including a (meth)acrylate ester (b) having an alkyl group or an aromatic group and an aromatic vinyl monomer (b) on a polyorganosiloxane-based rubber. The graft copolymer has a volume average particle diameter of 200-2000 nm, and contains 0.1-69 mass % of polyorganosiloxane. A thermoplastic resin composition is also described, containing a thermoplastic resin (A), the graft copolymer, a fluorine resin (C) and a flame retardant (D). A molded article is also described, which is obtained by molding the thermoplastic resin composition.

Polyorganosiloxane-containing graft copolymer, resin composition, and molded article

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Otake, Japan

Yuichiro Fujikawa