POLYARYLENE SULPHIDE FOAMS AND PROCESS FOR PRODUCING THE SAME

摘要

PCT No. PCT/EP95/03080 Sec. 371 Date May 2, 1997 Sec. 102(e) Date May 2, 1997 PCT Filed Aug. 2, 1995 PCT Pub. No. WO96/05246 PCT Pub. Date Feb. 22, 1996A foamed polyarylene sulfide according to the invention has a density which is reduced by at least 50% compared with the theoretical density of nonfoamed material, and is expediently produced by subjecting a polyarylene sulfoxide as such or a mixture of one or more polyarylene sulfides with a polyarylene sulfoxide to heat treatment. The temperature of the heat treatment is in the range from 250 DEG to 400 DEG C.