Techno-umg Co., Ltd.

Mitsubishi Chemical Corporation

Ichiro Kamata

Hiroyuki Atsuta

Takashi Iwanaga

Yoshitaka Naito

Hironori Matsuyama

Kentaro Hiraishi

Yuusuke Fukamachi

Yoshiaki Shinohara

Naotoshi Oohashi

A thermoplastic resin composition comprising: a graft copolymer (A) obtained by polymerizing a vinyl monomer mixture (m1) in the presence of a specific alkyl (meth)acrylate rubbery polymer (a); a graft copolymer (B) obtained by polymerizing a vinyl monomer mixture (m2) in the presence of a specific alkyl (meth)acrylate rubbery polymer (b); and a vinyl copolymer (C) obtained by polymerizing a vinyl monomer mixture (m3), wherein: a proportion of a rubbery polymer contained in the thermoplastic resin composition is 21 to 28% by mass, and a proportion of particles with a particle size of 300 nm or more among all particles formed by the rubbery polymer is 1 to 11% by mass.

Thermoplastic resin composition and molded article of same

A thermoplastic resin composition comprising a graft copolymer (A), a vinyl copolymer (B), and a metal component (C), wherein: an amount of the metal component (C) is 60 ppm or more relative to a total mass of the thermoplastic resin composition, the graft copolymer (A) is a graft polymer obtained by polymerizing 80% by mass to 20% by mass of a vinyl monomer mixture (m1) including at least one type of vinyl monomer in the presence of 20% by mass to 80% by mass of a rubbery polymer (a) including a polyorganosiloxane and an alkyl (meth)acrylate polymer, the vinyl copolymer (B) is a vinyl copolymer obtained by polymerizing a vinyl monomer mixture (m2) including an alkyl (meth)acrylate monomer, and the metal component (C) is an alkali metal.

Thermoplastic resin composition and molded article

A method for producing a rubbery polymer includes a step of preparing a mixture containing an alkyl (meth)acrylate, a hydrophobe, and an emulsifier, wherein an amount of the hydrophobe is 0.1-10 parts by mass relative to 100 parts by mass of the alkyl (meth)acrylate, and an amount of emulsifier is 0.01-1.0 part by mass relative to 100 parts by mass of the alkyl (meth)acrylate; a step of applying a shear force to the mixture to prepare a pre-emulsion, and a step of heating the pre-emulsion to polymerize the resulting mixture by miniemulsion polymerization.

Method of producing a rubbery polymer

A graft copolymer (B-III) includes a rubbery polymer (A-III) that is a miniemulsion polymerization reaction product of an alkyl (meth)acrylate; and at least one monomer selected from aromatic vinyl compounds, (meth)acrylic acid esters, and vinyl cyanide compounds graft-polymerized onto the rubbery polymer (A-III).

Graft copolymer, and thermoplastic resin composition using same

A thermoplastic resin composition is provided from which a molded article that has excellent string resistance at the time of hot plate welding, a highly excellent surface appearance, generates a small amount of gas from the material, and has sufficient impact resistance as a material for a lamp housing can be obtained. The thermoplastic resin composition contains a thermoplastic resin component and a saponified fatty acid ester, in which a content of the saponified fatty acid ester is in a range of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the thermoplastic resin component.

Thermoplastic resin composition for hot plate welding, molded article thereof, and resin conjugate

The thermoplastic resin composition of the present invention contains a thermoplastic resin (A) and carbon black (B), wherein the thermoplastic resin (A) contains a graft copolymer (C) in which a vinyl-based polymer is grafted to a rubber-like polymer, the carbon black (B) has a volume average particle size of secondary particles of 200 nm or more, and a proportion of secondary particles having a particle size of 800 nm or more with respect to the entire secondary particles of less than 20% by volume, and a content of the carbon black (B) is from 0.1 to 3.0 parts by mass with respect to 100 parts by mass of the thermoplastic resin (A).

Thermoplastic resin composition and molded article in which same is used

The present invention is to provide a thermoplastic resin composition capable of obtaining a molded article that is excellent in appearance after laser welding and a color tone and has sufficient impact property as a resin member. In addition, the present invention is to provide a molded article that is excellent in appearance after laser welding and a color tone and has sufficient impact resistance as a resin member. As a result of intensive studies, the present inventors have found that the above problems can be solved by controlling a thermoplastic resin composition containing rubber-containing graft copolymer to have appropriate reflectance in the visible light and absorptivity in the near-infrared region, and have completed the present invention.

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Ube, Japan

Ichiro Kamata