Patent ID: 7137423
Filing Date: 2006-11-21
Classification: B60C,C08C,C08K,C08L

Abstract:
1. A tire having at least one component of a rubber composition comprised of, based upon parts by weight per 100 parts by weight of elastomer (phr), (A) elastomers comprised of: (B) about 35 to about 100 phr of particulate reinforcement comprised of (C) an alkoxysilane polysulfide based coupling agent having: wherein: (D) said carbon black which contains said domains of silica on its surface is pre-reacted with said coupling agent to form a composite thereof prior to addition to said amine functionalized styrene/conjugated diene copolymer elastomer, (E) said coupling agent is a combination of a first alkoxysilane polysulfide as a bis-(3-triethoxysilylpropyl) polysulfide having an average of from 2 to 2.6 connecting sulfur atoms in its polysulfidic bridge and a second polysulfide as a bis-(3-triethoxysilylpropyl) polysulfide having an average of from 3 to 4 connecting sulfur atoms in its polysulfidic bridge, wherein said first polysulfide is blended with said rubber composition in the absence of sulfur and sulfur vulcanization accelerator and wherein said second polysulfide is thereafter blended with said rubber composition in the presence of sulfur and at least one sulfur vulcanization accelerator, and/or (F) at least one amine group is introduced as one or more terminal amine groups at an end of the copolymer chain by copolymerizing styrene and at least one of 1,3-butadiene and isoprene monomers in an organic solvent solution in the presence of using a polymerization initiator of the general formula (IV): wherein said polymerization initiator is modified by chain extension with isoprene.