Transparent heat-resistant styrene-base copolymer

Details Transparent heat-resistant styrene-base copolymer Transparent heat-resistant styrene-base copolymer

C - Chemistry, Metallurgy

08

F

402/297

C08F 212/04 (2006.01)

Patent

CA 1306828

Abstract A transparent heat-resistant styrene-base copolymer useful, for example, as a molding material, comprising specific amounts of units derived respectively from (a) a styrene-type monomer, (b) a (meth)acrylonitrile monomer and/or (meth)acrylic ester type monomer and (c) a phenylmaleimide monomer, in which the weight ratio (b)/(c) and the ratio of the weight average molecular weight to the number average molecular weight fall within their respective specific ranges and the amount of the phenylmaleimide-type monomer still remaining in the copolymer is below a certain specific concentration.

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