Fast cooling styrene polymer foams

Details Fast cooling styrene polymer foams Fast cooling styrene polymer foams

C - Chemistry, Metallurgy

08

J

403/64, 403/76,

C08J 9/18 (2006.01) C08J 9/00 (2006.01) C08J 9/224 (2006.01) C08L 25/06 (2006.01) F02B 75/02 (2006.01)

Patent

CA 1054300

FAST COOLING STYRENE POLYMER FOAMS ABSTRACT OF THE DISCLOSURE Expandable styrene polymer particles which have fast cooling rates during molding are produced by dry blending styrene polymer 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 con- sisting of alkyl having 1 to 4 carbon atoms and halogenated alkyl having 1 to 4 carbon atoms, and at least one poly- oxyalkylene block containing mers of general formula CnH2nO, where n is 2, 3 or 4, attached to said polysiloxane block and terminated by acetoxy or alkyl ether groups. 1.

249049

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