Patent ID: 6683135
Filing Date: 2004-01-27
Classification: C07F,C08J,C08K,C08L

Abstract:
A rubber composition comprising:a) a blocked mercaptosilane selected from the group consisting of: [[(ROC(&boxH;O))pâ€”(G)j]kâ€”Yâ€”S]râ€”Gâ€”(SiX3)sâ€ƒâ€ƒ(1); and[(X3Si)qâ€”G]aâ€”[Yâ€”[Sâ€”Gâ€”SiX3]b]câ€ƒâ€ƒ(2) whereinY is a polyvalent species (Q)zA(&boxH;E), each wherein the atom A attached to the unsaturated heteroatom E is attached to the sulfur, which in turn is linked via a group G to the silicon atom; 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 if Y is â€”C(&boxH;O)â€”, G is not such that the blocked mercaptosilane would contain an &agr;,&bgr;-unsaturated carbonyl, and if G is univalent, G can be a hydrogen atom; X is independently selected from the group consisting of â€”Cl, â€”Br, ROâ€”, RC(&boxH;O)Oâ€”, R2C&boxH;NOâ€”, R2NOâ€”, R2Nâ€”, â€”R, and â€”(OSiR2)t(OSiR3) wherein each R is as above and at least one X is not â€”R; Q is oxygen, sulfur, or (â€”NRâ€”); A is carbon, sulfur, phosphorus, or sulfonyl; E is oxygen, sulfur, or NR; p is 0 to 5; r is 1 to 3; z is 0 to 2; q is 0 to 6; a is 0 to 7; b is 1 to 3; j is 0 to 1, but it may be 0 only if p is 1; c is 1 to 6, t is 0 to 5; s is 1 to 3; k is 1 to 2, with the provisos that (A) if A is carbon, sulfur, or sulfonyl, then (i) a+b is 2 and (ii) k is 1; (B) if A is phosphorus, then a+b is 3 unless both (i) c is greater than 1 and (ii) b is 1, in which case a is c+1; and (C) if A is phosphorus, then k is 2; b) an organic polymer; c) a filler; and d) a deblocking agent.