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

1981-12-16

1984-10-09

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264DIG5, 425817C, 521 79, 521146, B29D 2700

Patent

active

044760779

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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