B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 1/00 (2006.01) B60C 11/00 (2006.01)
Patent
CA 2180768
The invention relates to a truck or bus tire with a rubber tread of cap/base construction where the tread cap is composed of an emulsion polymerization prepared styrene/butadiene copolymer elastomer with a relatively random styrene content (E-SBR-A). Such E-SBR-A, in its uncured state, also has a relatively low Tg. In one aspect, the tire tread's tread cap may also be a blend of elastomers such as cis 1,4- polybutadiene and/or natural rubber together with said E-SBR-A and wherein the tread base elastomer is composed primarily of natural cis 1,4-polyisoprene rubber. In another aspect of the invention, said tread cap has a tread design composed of at least three circumferential continuous ribs designed to be road contacting, said ribs independently separated by continuous, circumferential grooves.
L'invention concerne les pneus de camions ou d'autobus, avec une bande de type chape/base où la chape est constituée d'un élastomère de copolymère de styrène/butadiène, obtenu par polymérisation par émulsion, avec une teneur en styrène relativement aléatoire (E-SBR-A). Cet E-SBR-A possède, à l'état réticulé, une Tg relativement basse. La chape peut également être constituée d'un mélange d'élastomères comme le poly(1,4-butadiène cis) et (ou) le caoutchouc naturel avec ledit E-SBR-A, où l'élastomère de la base est composé principalement de caoutchouc de 1,4-poly(1,4-isoprène cis) naturel. Autre aspect de l'invention : la chape comporte au moins trois nervures continues sur tout le tour, au contact de la route, lesdites nervures étant séparées par des creux continus également sur tout le tour.
Mezynski Stanley Michael
Rodgers Michael Brendan
Ryba Jennifer Lyn
Sim & Mcburney
The Goodyear Tire & Rubber Company
LandOfFree
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