METHOD OF PRODUCING OPEN CELL ALKENYL AROMATIC POLYMER FOAMS

摘要

Disclosed is a method of enhancing open cell formation in making extruded alkenyl aromatic polymer foams of about 30 % or more open cell content. Open cell formation is enhanced by incorporating into the foam an ethylene copolymer having a Vicat softening point of about 85 ~C or less. The ethylene copolymer is incorporated at from about 0.1 to about 7 percent based upon the weight of the alkenly aromatic polymer material comprising the foam.