Process for preparing a poly (p-methylstyrene) foam

Details Process for preparing a poly (p-methylstyrene) foam Process for preparing a poly (p-methylstyrene) foam

B - Operations, Transporting

29

C

18/661

B29C 67/20 (2006.01) B29C 44/34 (2006.01) C08J 9/14 (2006.01)

Patent

CA 1204569

PROCESS FOR PREPARING A POLY(p-METHYLSTYRENE) FOAM ABSTRACT: A process for preparing a poly(p-methylstyrene) polymer foam including extruding a poly (p-methylstyrene) foam structure from a melt at a temperature which will yield an open cell percentage less than that formed in general purpose polystyrene foamed under the same general conditions. It also includes performing the extrusion from a melt at a rate which will yield a foam structure at least comparable to that of general purpose polystyrene foam, wherein the extrusion rate is greater than the extrusion rate for said polystyrene foam.

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