Patent ID: 6444759
Filing Date: 2002-09-03
Classification: C08K

Abstract:
A vulcanizable rubber composition comprising a rubber, sulfur or a sulfur donor, a vulcanization accelerator, a protective agent and 0.1 phr or more of an N,Nâ€²-disubstituted p-phenylenediamine protective agent selected from the group consisting of N-isopropyl-Nâ€²-phenyl-p-phenylenediamine, N-(1,3-dimethyl-butyl)-Nâ€²-phenyl-p-phenylenediamine (6PPD), N,Nâ€²-bis-(1,4-dimethyl-pentyl)-p-phenylenediamine, N,Nâ€²-bis-(1-ethyl-3-methylpentyl)-p-phenylenediamine, N,Nâ€²-diphenyl-p-phenylenediamine, N,Nâ€²-ditolyl-p-phenylenediamine, and N,Nâ€²-di-&bgr;-napthyl-p-phenylenediamine, present in the form of a salt with a C1-C24 monocarboxylic acid or a C2-C24 dicarboxylic acid, said composition not comprising an elastomeric copolymer having glycidyl groups.