Process for producing a heat resistant resin composition

Details Process for producing a heat resistant resin composition Process for producing a heat resistant resin composition

C - Chemistry, Metallurgy

08

F

402/297

C08F 222/40 (2006.01) C08F 212/00 (2006.01) C08F 212/04 (2006.01)

Patent

CA 1322071

ABSTRACT A process for producing a heat resistant resin composition, which comprises polymerizing by suspension polymerization a monomer mixture comprising from 30 to 80% by weight of an aromatic vinyl monomer, from 10 to 50% by weight of an N-substituted maleimide monomer, from 10 to 40% by weight of a vinyl cyanide monomer and from 0 to 30% by weight of other vinyl monomer copolymerizable therewith, characterized in that the polymerization reaction is initiated in the presence of a part of the monomer mixture and a part of a suspending agent in the suspension polymerization system prior to the initiation of the polymerization reaction, and then during the polymerization, the rest of the monomer mixture and the rest of the suspending agent are added to the polymerization system continuously or intermittently to complete the polymerization reaction.

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