Bridgestone Corporation

Rita E Cook

Yuan-Yong Yan

Zengquan Qin

Christine M Rademacher

Koichi Saito

Erin Sheepwash

A vulcanizate prepared by a method comprising introducing an elastomer, a filler, and a polar polysulfide crosslinking agent to form a masterbatch and introducing a curative to the masterbatch to form a vulcanizable composition. Vulcanizing the composition to graft the polar group from the crosslinking agent onto an elastomer to increase the hydrophilicity of the composition.

Rubber compositions prepared with a polar polysulfide crosslinking agent

Disclosed herein are coupled polymer products comprising polymer with up to five polymer chains bonded to a functionalizing compound of either formula (II) or formula (III), wherein the polymer chains are comprised of conjugated diene-containing monomers optionally in combination with vinyl aromatic monomers and further include vinyl group-functionalized aminosilane compound of formula (I) bonded within the polymer chain. Also disclosed are processes for producing the coupled polymer products as well as a rubber composition containing the coupled polymer product and tire components comprising the rubber composition.

Coupled polymer products, methods of making and compositions containing

Disclosed herein are a functionalized diene monomer-containing polymer containing first and second functionalizing groups, processes for preparing the functionalized polymer, and rubber compositions containing the functionalized polymer. The functionalized polymer contains polymer chains comprises of at least one conjugated diene monomer optionally in combination with at least one vinyl aromatic monomer wherein each polymer chain is functionalized at its chain end with at least the first functionalizing group and is coupled via the first functionalizing group to the second functionalizing group.

Functionalized polymer, process for preparing and rubber compositions containing the functionalized polymer

Disclosed herein is a coupled polymer product comprising polymer with up to four polymer chains bonded to a functionalizing compound of formula II, wherein the polymer chains are comprised of conjugated diene-containing monomers optionally in combination with vinyl aromatic monomers and further include vinyl group-functionalized silane compound of formula I bonded within the polymer chain. Also disclosed are processes for producing the coupled polymer product as well as a rubber composition containing the coupled polymer product and tire components comprising the rubber composition.

Growing community of inventors

Akron, OH, United States of America

Rita E Cook