Patent ID: 8148467

Claim:
A silicone-polymer-modified vulcanized-rubber composition based on unvulcanized rubber, characterized in that the composition is produced by co-vulcanization from the following components: A1) at least one vinyl-reactive polysiloxane component; A2) at least one mercapto-reactive polysiloxane component, and B) at least one unsaturated vulcanizable unvulcanized-rubber component, wherein the weight-average molecular weight of the mercapto-reactive polysiloxane component A2) is from 3000 to 28 000 and wherein the vinyl-reactive polysiloxane component A1) has been selected from the group consisting of vinyldimethyl-terminated polydimethylsiloxanes, vinylmethylsiloxane-polydimethyl-siloxane copolymers, alkyldimethyl-terminated polydimethylsiloxanes, vinyl-terminated dimethyldiphenyl-siloxane copolymers, and branched polydimethylsiloxanes having a vinyl group at the branching point.