C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 7/00 (2006.01) B60C 1/00 (2006.01) B60C 11/00 (2006.01) C08L 9/00 (2006.01)
Patent
CA 2138609
Pneumatic rubber tire with a tread composed of a rubber blend of a base of at least two synthetic elastomers composed of (i) specialized isoprene/butadiene copolymer elastomer having a low Tg in a range of about -70 to about -100°C and (ii) a diene based elastomer having a Tg in a range of about -5 to about -30°C together with a minor amount of natural cis 1,4-polyisoprene rubber. Selection of the base of the said two synthetic elastomers having spaced apart, or spatially defined, Tg's of at least 40°C is an important feature of the tread rubber blend. Representative examples of contemplated elastomers with Tg's in a range of about -5 to about -30°C are 3,4-polyisoprene elastomer, styrene/isoprene copolymer elastomer and high vinyl polybutadiene elastomers. In one aspect, the tread rubber blend is reinforced with reinforcing filler composed of carbon black or a combination of carbon black and silica accompanied by a coupling agent.
Dirossi Raymond Robert
Holtzapple Gregory Martin
Sandstrom Paul Harry
Verthe John Joseph Andre
Zanzig David John
Smart & Biggar
The Goodyear Tire & Rubber Company
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