Tire tread compounds based on vinyl polybutadiene

Details Tire tread compounds based on vinyl polybutadiene Tire tread compounds based on vinyl polybutadiene

C - Chemistry, Metallurgy

08

L

400/1124, 400/49

C08L 9/00 (2006.01) B60C 1/00 (2006.01)

Patent

CA 1296117

Abstract of the Disclosure Rubber compositions for use in tire tread compounds comprise co- vulcanizable blends of high 1,2 (vinyl) content polybutadiene of high molecular weight and high cis-1,4-poly-butadiene of high molecular weight. The blends show a high degree of homogeneity, so that they act effectively as a single polymer, and exhibit a substantial absence of a glass transition temperature. The relative amounts of the two polymers are such as to obtain a 1,2-group content in the blend of from 35-65 percent. The blend may be compounded with conventional compounding ingredients for curing purposes, and optionally with additional polymers such as natural rubber and/or SBR. The vulcanizates of the compositions exhibit a superior and unexpected balance of resilience, traction and wear properties.

545034

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