Fast cooling styrene polymer foams

Details Fast cooling styrene polymer foams Fast cooling styrene polymer foams

C - Chemistry, Metallurgy

08

J

403/76, 403/80

C08J 9/18 (2006.01) C08J 9/00 (2006.01) C08L 25/06 (2006.01)

Patent

CA 1054299

. FAST-COOLING STYRENE POLYMER FOAMS 73S216 ABSTRACT OF THE DISCLOSURE Expandable styrene polymer particles which have fast cooling rates during molding are produced by suspending styrene polymer particles in an aqueous medium and impregnating a blowing agent into the particles in the presence of 0.05 to 0.4 parts of silicone surfactant per 100 parts of polymer particles. The silicone surfactant is selected from the siloxane-oxyalkylene copolymers having at least one polysiloxane block which contains mers of the general formula R2SiO, where R is selected from the group consisting of alkyl having 1 to 4 carbon atoms and halo- genated alkyl having 1 to 4 carbon atoms, and at least one polyoxyalkylene block containing mers of general formula CnH2nO, where n is 2, 3 or 4, attached to said polysiloxane block and terminated by hydroxyl groups. 1.

249016

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