Method of preparing styrene foams

Details Method of preparing styrene foams Method of preparing styrene foams

B - Operations, Transporting

29

C

18/664

B29C 47/88 (2006.01) C08F 112/08 (2006.01) C08J 9/00 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2011463

ABSTRACT OF THE DISCLOSURE A foam body being characterized as having a density of between about 0.9 to about 3.5 pounds per cubic foot, and a process for preparing the foam body, is described. The process comprises the steps of (A) heat plastifying a mixture of a thermoplastic resin and at least one halocarbon polymer; (B) adding at least one blowing agent to the plastified resin; (C) forming a blowable resin mixture by uniformly mixing the blowing agent and the halocarbon powder in the resin under a pressure sufficient to prevent blowing of the resin; (D) extruding the mixture into a region wherein the blowable resin mixture expands into a foam body; and (E) cooling the foam body.

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