Rubber vulcanizers having improved aging properties

摘要

"RUBBER VULCANIZED HAVING IMPROVED AGING PROPERTIES". The invention relates to a vulcanizable rubber composition comprising a rubber, sulfur or sulfur donor, a vulcanization accelerator, and a protective agent and is characterized by the fact that 0.1 phr or more of a p-protective agent N, N'-di-substituted phenylene diamine is present in the form of a salt with an acid, and the composition does not comprise an elastomeric copolymer having glycidyl groups. The invention also relates to a vulcanization process comprising mixing and heating said rubber composition and an article of manufacture comprising the vulcanized rubber obtained through said process. Preferably, the acid is a C ~ 1-24 ~ monocarboxylic acid or a C ~ 2-24 ~ dicarboxylic acid, more preferably a C ~ 12-20 ~ fatty acid such as stearic acid. Most preferably, the protective agent is 6PPD.