Patent ID: 6602923
Filing Date: 2003-08-05
Classification: C08J

Abstract:
A process for the production of alkenyl aromatic foams, said process comprising:(a) heating alkenyl aromatic resin to a temperature above its melting point to form a melted alkenyl aromatic resin; (b) adding talc to the melted alkenyl aromatic resin to form an alkenyl aromatic/talc blend; (c) adding to the alkenyl aromatic/talc blend a non-solid blowing agent comprised of cycloaliphatic gas, wherein said cycloaliphatic gas is present in an amount equal to or greater than the amount of atmospheric gas to form an added melted blend; (d) mixing the added melted blend to form a mixed added melted blend; and (e) extruding and cooling the mixed added melted blend.