Rubber composition which is free of carcinogenic nitrosamine precursor and serves as connecting rubber
OwnerBrigitte Chauvin, Jean-Luc Mangeretinventors
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Abstract
A rubber composition which is free of precursor of at least one carcinogenic nitrosamine, is capable of vulcanization at a temperature of between 95° C. and 140° C., and has a vulcanization system which includes: a) sulfur; b) an accelerator compound; c) an ultra-accelerator compound; d) a vulcanization amine activator. A process for vulcanizing this composition in the manufacture of a new tire or in the repair and/or recapping of a worn tire.
Claims21
A composition which is free of precursor of at least one carcinogenic nitrosamine containing at least one rubber selected from the group consisting of natural rubber, polyisoprene, polybutadiene, styrene-butadiene, styrene-isopreneland butadiene-isoprene copolymers, and styrene-butadiene-isoprene terpolymers, and capable of vulcanizing at a temperature between 95° C. and 140° C., characterized by the fact that it comprises, as vulcanization system:
- a) sulfur;
- b) at least one accelerator compound selected from the group consisting of benzothiazyl disulfide and mercaptobenzothiazole;
- c) at least one ultra-accelerator compound selected from the group consisting of tetrabenzylthiuram disulfide and zinc dibenzyldithiocarbamate;
- d) at least one vulcanization amine activator selected from the group consisting of amines, guanidines, aldehyde and amine condensates, and quaternary ammonium salts.
Dependencies are inferred from the claim text.