Fast cooling styrene polymer foams

Details Fast cooling styrene polymer foams Fast cooling styrene polymer foams

1975-06-17

1977-03-22

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25S, 260827, 264 53, 264237, C08J 922

Patent

active

040135977

ABSTRACT:
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 R.sub.2 SiO, where R is selected from the group consisting of alkyl having 1 to 4 carbon atoms and halogenated alkyl having 1 to 4 carbon atoms, and at least one polyoxyalkylene block containing mers of general formula C.sub.n H.sub.2n O, where n is 2, 3 or 4, attached to said polysiloxane block and terminated by acetoxy or alkyl ether groups.

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