Patent ID: 7081500
Filing Date: 2006-07-25
Classification: C07F,C08J,C08K,C08L

Abstract:
1. A process of manufacturing a filled rubber comprising the steps of mixing a rubber, an inorganic filler, and a blocked mercaptosilane of the formula wherein Y is a polyvalent species (Q) each R is chosen independently from hydrogen, straight, cyclic, or branched alkyl that may or may not contain unsaturation, alkenyl groups, aryl groups, and aralkyl groups, with each R containing from 1 to 18 carbon atoms; each G is independently a monovalent or polyvalent group derived by substitution of alkyl, alkenyl, aryl, or aralkyl wherein G can contain from 1 to 18 carbon atoms, with the proviso that G is not such that the blocked mercaptosilane would contain an α,β-unsaturated carbonyl that can undergo polymerization reactions, and if G is univalent, G can be a hydrogen atom; X is independently selected from the group consisting of —Cl, —Br, RO—, RC(═O)O—, R p is 0 to 5; r is 1 to 3; z is 0 to 2; j is 0 to 1, but it may be 0 only if p is 1; t is 0 to 5; s is 1 to 3; k is 1 to 2; with the provisos that (I) if A is carbon, sulfur, or sulfonyl, then k is 1; and (II) if A is phosphorus, then k is 2; to produce a rubber mixture; mixing into the rubber mixture (i) a deblocking agent to deblock the blocked mercaptosilane, and (ii) a curing agent; and allowing the rubber mixture to cure.