Patent ID: 6982050

Claim:
A process for recapping a tire which comprises the steps of: Applying between two prevulcanized parts of rubber, for connecting said parts, a rubber composition which is free of precursor of at least one carcinogenic nitrosamine, comprising at least one rubber selected from the group consisting of natural rubber, polyisoprene, polybutadiene, styrenebutadiene copolymer, styrene-isoprene copolymer and styrene-butadiene-isoprene terpolymer, and capable of vulcanizing in a cold vulcanization process at a temperature between about 95° C. to about 140° C., wherein the composition comprises, as vulcanization system (parts by weight for 100 parts of rubber): between about 0.5 and about 5 parts of sulfur; between about 0.1 and about 3 parts of at least one accelerator compound selected from the group consisting of benzothiazyl disulfide and mercaptobenzothiazole; between about 0.2 and about 3 parts of at least one ultra-accelerator compound selected from the group consisting of tetrabenzylthiuram disulfide and zinc dibenzyldithiocarbamate; and between about 0.05 and about 1 part of at least one vulcanization amine activator selected from the group consisting of amines, guanidines, aldehyde and amine condensates, and quaternary ammonium salts; and Vulcanizing said parts at a temperature between about 95° C. and about 140° C.