초록

This invention relates to the discovery that the addition of a free triacrylate, tetraacrylate and/or pentaacrylate compound(s) to an uncrosslinked rubber which is then sulfur-vulcanized results in desirable reversion resistant rubber compound properties.

대표청구항 ▼

[ What is claimed is:] [1.] A sulfur-vulcanizable rubber compound comprising(a) 100 parts by weight of an uncrosslinked rubber selected from the group consisting of natural rubber, synthetic cis-1,4-polyisoprene, polybutadiene, copolymers of isoprene and butadiene, copolymers of acrylonitrile and bu

[ What is claimed is:] [1.] A sulfur-vulcanizable rubber compound comprising(a) 100 parts by weight of an uncrosslinked rubber selected from the group consisting of natural rubber, synthetic cis-1,4-polyisoprene, polybutadiene, copolymers of isoprene and butadiene, copolymers of acrylonitrile and butadiene, copolymers of acrylonitrile and isoprene, terpolymers of styrene, butadiene and isoprene, copolymers of styrene and butadiene and blends thereof;(b) from 0.25 to 10 phr of a free acrylate compound which is intimately dispersed throughout said rubber and said acrylate being selected from the group consisting of trimethyl propane triacrylate, trimethyl propane trimethacrylate, glycerol triacrylate, glycerol trimethacrylate, trimethyl ethane triacrylate, trimethyl ethane triacrylate, pentaerythritol tetraacrylate, pentaerythritol tetramethacrylate, dipentaerythritol pentaacrylate and mixtures thereof;(c) from 0.5 to 6 phr of a sulfur-vulcanizing agent selected from the group consisting of elemental sulfur, an amine disulfide, polymeric polysulfide, sulfur olefin adducts and mixtures thereof;wherein said rubber compound is free from any peroxide curative.