Patent ID: 7987881
Filing Date: 2011-08-02
Classification: B60C,C08K,Y10S

Abstract:
1. A rubber tread for a tire, the rubber tread comprising: a plurality of tread pattern elements comprising lateral faces, one contact face for contact with a roadway during travel of the tire, and at least one ridge defined by a limit of the surface of contact of the contact face with the roadway; a plurality of cutouts being defined by the lateral faces; wherein each of the tread pattern elements is formed with at least one base mix and at least one covering mix; wherein at least one of the lateral faces is covered at least in part with the covering mix having a height Hr at least equal to 30% of a height H of the at least one lateral face before a new tire is used, wherein the at least one base mix extends to the contact face either before the new tire is used or after wear is up to 10% of the height Hr of the covering mix, wherein said covering mix comprises more than 30 phr of a butyl rubber and a plasticiser of an unsaturated C wherein the at least one base mix is free of an unsaturated C