Crosslinked foamed body and a process for its production

摘要

PCT No. PCT/JP94/02081 Sec. 371 Date Aug. 11, 1995 Sec. 102(e) Date Aug. 11, 1995 PCT Filed Dec. 12, 1994 PCT Pub. No. WO95/16732 PCT Pub. Date Jun. 22, 1995A crosslinked foamed body obtained by subjecting a rubber compounded product comprising (A) a chlorinated ethylene/ alpha -olefin copolymer rubber, (B) a triazinethiol as a vulcanization agent, (C) an alkyl ammonium halide as a vulcanization promotor, and (D) a hydrazide-type blowing agent to two step vulcanization and foaming at a vulcanization temperature of 120 DEG to 140 DEG C. for a vulcanization time of 5 to 10 minutes in a first step and at a vulcanization temperature of 125 DEG to 160 DEG C. for a vulcanization time of 5 to 20 minutes in a second step, the second step vulcanization temperature being higher than the first step by at least 5 DEG C., so that the expansion factor will be 3 to 10 times. This crosslinked foamed body can be colored brilliantly, exhibit excellent weatherability, suppleness and shape retention as well as good outer appearance. This product is well usable, for example, as wet suits.