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AssigneeThe Goodyear Tire & Rubber Company
InventorsPaul Harry Sandstrom, Xiaoping Yang, Kuo-Chih Hua, James Joseph Golden, Daniel Ray Beha
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The subject invention is directed towards tire components comprising rubber compositions comprising (1) about 2 phr to about 45 phr of a trans-1,4-isoprene-butadiene copolymer which has about 4 weight percent to about 16 weight percent butadiene repeat units and from about 84 weight percent to about 96 weight percent isoprene repeat units, wherein the trans-1,4-isoprene-butadiene copolymer has a Mooney ML 1+4 viscosity which is within the range of about 35 to about 80; and (2) about 55 phr to about 98 phr of at least one other elastomer, preferably a diene based elastomer. The most preferred tire components are those which contain cord reinforcements and require adequate green strength to enhance the tire building and shaping process to maintain cord integrity in the final cured tire.
A rubber composition consisting of (1) 3 phr to about 30 phr of a trans-1,4-isoprene-butadiene copolymer containing 5 weight percent to 10 weight percent 1,3-butadiene repeat units and from 90 weight percent to about 95 weight percent isoprene repeat units, wherein the trans-1,4-isoprene-butadiene copolymer has a Mooney ML 1+4 viscosity at 100° C. which is within the range of 65 to 75, and wherein the trans-1,4-isoprene-butadiene copolymer has a melting point which is within the range of 30° C. to 65° C.;
Dependencies are inferred from the claim text.