Bridgestone Corporation

Arif Omer Gozen

Yaohong Chen

Toshihiro Uchiyama

William L Hergenrother

Christopher G Robertson

Terrence Eugene Hogan

Amy M Randall

Mindaugas Rackaitis

James D Ulmer

Embodiments of the present disclosure are directed to polyolefin grafted polydiene polymers, wherein the polyolefin grafted polydiene polymers comprises a polydiene having a polydiene polymer backbone, a polyolefin, and at least one sulfur containing functionalizing agent which grafts the polyolefin onto at least one non-terminal position on the polydiene polymer backbone.

Polyolefin grafted polydiene polymers, and methods of making and using same

A polymeric composition includes a diene elastomer; an azodicarboxy compound; and a reinforcing filler comprising silica. The composition is not foamed. A method for preparing a polymeric composition includes mixing in one or more steps: a diene elastomer; an azodicarboxy compound; and a reinforcing filler. The mixing temperature is less than 160&#xb0; C. in mixing steps in which the azodicarboxy compound is present. In an embodiment, the mixing temperature is kept below the decomposition temperature of the azodicarboxy compound.

Azodicarboxy additives for rubber compositions

Provided herein are organic solvent-based processes for the isolation of purified natural rubber from non-plants. The processes are particularly useful with plant matter that comprises at least 90% by weight roots sourced from-(Russian dandelion),-(Tau-Saghyz),, and combinations thereof. Also provided herein is a purified non-rubber product containing 100 phr of rubber sourced from---, and combinations thereof, having a specified purity level. Additionally provided are sulfur-vulcanizable rubber compounds and sulfur-vulcanized rubber compounds that incorporate 10-100 phr of purified non-rubber product sourced from--, and combinations thereof, having a specified purity level.

Compositions containing purified non-hevea rubber and related purification methods

Disclosed herein are rubber compositions comprising at least one conjugated diene polymer or copolymer, silica filler, and a silica shielding agent of formula (I), and related methods such as for improving silica dispersability in silica-filled rubber compositions. Also disclosed herein are tire components, such as tire treads containing the rubber compositions disclosed herein.

Silica shielding agents and related methods

Disclosed herein are vulcanizable and vulcanized rubber compositions comprising a conjugated diene polymer or copolymer, silica, and a substituted imidazole-based silica shielding agent of Formula (I), and methods for preparing such rubber compositions. Also disclosed herein are tire components, such as tire treads, containing the rubber compositions disclosed herein.

Rubber composition with imidazole-based silica shielding agent

The present disclosure provides reinforcing filler-containing rubber compositions suitable for use in tires, and particularly in tire treads. These rubber compositions comprise a metal carboxylate. The metal carboxylate provides improved processability to the rubber compositions in the form of a reduced Mooney viscosity. In certain exemplary embodiments, these rubber compositions containing the metal carboxylate also have an enhanced elastic modulus (also referred to as the G'). Further, in certain of the enhanced elastic modulus embodiments, the rubber compositions containing the metal carboxylate also have decreased hysteresis loss.

Growing community of inventors

Akron, OH, United States of America

Arif Omer Gozen