ANTI-REVERSION COAGENTS FOR RUBBER VULCANIZATION

摘要

PCT No. PCT/EP91/02048 Sec. 371 Date Apr. 28, 1993 Sec. 102(e) Date Apr. 28, 1993 PCT Filed Oct. 29, 1991 PCT Pub. No. WO92/07904 PCT Pub. Date May 14, 1992.A rubber composition which is the vulcanization reaction product of a rubber, sulfur or a sulfur donor and particular anti-reversion coagents, is disclosed. The anti-reversion coagents only partially react under sulfur-vulcanization reaction conditions up to optimum cure, and, after optimum cure, form cross-links bonded to the sulfur cross-linked rubbers by carbon-carbon linkages. Also disclosed are a vulcanization process carried out in the presence of the anti-reversion coagents and the use of these anti-reversion coagents in the sulfur-vulcanization of rubbers. The anti-reversion coagents of the disclosure provide sulfur-vulcanized rubbers having significantly improved physical properties.