RUBBER COMPOSITION AND ORGANOPOLYSILOXANE

WIPO Patent Application WO/2024/101082

A1

A rubber composition containing an organopolysiloxane, e.g., one represented by the following average empirical formula (1), which has a mercapto-group-containing organic group and either or both of a trialkoxysilyl-group-containing organic group and a dialkoxymethylsilyl-group-containing organic group. The rubber composition has excellent vulcanizability and, after having been vulcanized, is extremely good in tensile property, wet gripping, and low rolling resistance to render a desired fuel-saving tire possible.　(1) (A)a(B)b(C)c(D)dSiO(4-a-b-c-d)/2 (A represents a mercapto-group-containing organic group, B represents a trialkoxysilyl-group-containing organic group or a dialkoxymethylsilyl-group-containing organic group, C represents a hydrolyzable group, D represents a C1-C12 alkyl group, a C1-C10 haloalkyl group, or a C6-C12 aryl group, and a, b, c, and d indicate numbers satisfying 0