Method of making expandable styrene-type polymer beads

Details Method of making expandable styrene-type polymer beads Method of making expandable styrene-type polymer beads

C - Chemistry, Metallurgy

08

J

403/72, 403/80

C08J 9/16 (2006.01) C08J 9/18 (2006.01)

Patent

CA 1154200

Abstract Of The Disclosure Expendable styrene-type polymer beads having a short cooling time are made by impregnating the polymer beads, after the substantial completion of the polymerization, in an aqueous suspension medium comprising a suspending agent and about 0.005 - 0.3%, based on the weight of water, of non-ionic surfactant which is a copolymer of propylene oxide and ethylene oxide having an HLB number of 8 - 18 and an average molecular weight of at least 1,000, and by subsequently washing and drying the beads.

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