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1. (WO1994014881) PROCESS FOR PRODUCING ALKENYL AROMATIC FOAMS USING A COMBINATION OF ATMOSPHERIC AND ORGANIC GASES AND FOAMS PRODUCED THEREBY

Pub. No.:    WO/1994/014881    International Application No.:    PCT/US1993/012542
Publication Date: Fri Jul 08 01:59:59 CEST 1994 International Filing Date: Thu Dec 23 00:59:59 CET 1993
IPC: C08J 9/12
Applicants: REEDY, Michael, E.
RIDER, Edward, W., Jr.
Inventors: REEDY, Michael, E.
RIDER, Edward, W., Jr.
Title: PROCESS FOR PRODUCING ALKENYL AROMATIC FOAMS USING A COMBINATION OF ATMOSPHERIC AND ORGANIC GASES AND FOAMS PRODUCED THEREBY
Abstract:
There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30 % by weight of atmospheric gas, and preferably also using a predetermined amount of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.