Expandable thermoplastic resin particles and process for...

Details Expandable thermoplastic resin particles and process for... Expandable thermoplastic resin particles and process for...

C - Chemistry, Metallurgy

08

J

403/80

C08J 9/18 (2006.01)

Patent

CA 1214600

Abstract of the Disclosure Expandable thermoplastic resin particles having excellent heat resistance, solvent resistance, foamability and moldability comprising a copolymer of 10 to 80 % by weight of .alpha.-methylstyrene, 5 to 50 % by weight of acrylonitrile and 0 to 70 % by weight of at least one member selected from the group consisting of styrene, methyl methacrylate, vinyl toluene and t-butylstyrene, and an expanding agent impregnated in the copolymer, prepared easily in high conversions by an aqueous suspension polymerization using particular difunctional organic peroxides, preferably those capable of producing t-butoxy radicals, followed by impregnation of the produced polymer particles with the expanding agent.

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