Copolymer, process for producing copolymer, resin composition, shaped article and vehicle

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11008452
APP PUB NO 20180258272A1
SERIAL NO

15746235

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Abstract

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The present invention provides a copolymer containing 80 mol % or more of a methyl (metl)acrylate unit (A), wherein the Vicat softening temperature thereof is 115° C. or higher, the saturated water absorption rate thereof at 60° C. is 4 % by weight or less, and the yellow index thereof is 1 or less. The process for producing the copolymer includes suspension polymerizing a monomer mixture containing 80 mol % or more of methyl (meth)acrylate (a) and 0.7 mol % to 7 mol % of (meth)acrylic acid (b), followed by melting and kneading the resulting precursor with an extruder to obtain a copolymer containing 80 mol % or more of a methyl (meth)acrylate unit (A), 0.45 mol % to 7 mol % of a (meth)acrylic acid unit (B), and 0.001 mol % to 0.25 mol % of a glutaric anhydride unit (C) wherein a conversion rate to the glutaric anhydride unit (C) is 0.1 % to 5 %.

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Patent Owner(s)

  • MITSUBISHI CHEMICAL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsumoto, Akikazu Tokyo, JP 30 100
Okada, Haruki Tokyo, JP 11 83
Yamashita, Risa Tokyo, JP 4 17

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