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    • 1. 发明申请
    • Tire with tread of specialized trans 1,4-polybutadiene polymer and CIS 1,4-polyisoprene natural rubber
    • 专用反式1,4-聚丁二烯聚合物和CIS 1,4-聚异戊二烯天然橡胶的胎面轮胎
    • US20050245688A1
    • 2005-11-03
    • US10837740
    • 2004-05-03
    • Paul SandstromAdel HalasaWen-Liang HsuRoger BeersChad Jasiunas
    • Paul SandstromAdel HalasaWen-Liang HsuRoger BeersChad Jasiunas
    • B60C1/00C08K3/04C08K3/36C08L7/00C08L9/00C08L9/06C08L21/00
    • B60C1/0016C08K3/04C08K3/36C08L7/00C08L9/06C08L21/00C08L2666/02C08L2666/08
    • This invention relates to a tire with a tread of a natural rubber-rich rubber composition. A partial replacement of the natural rubber in the tire tread is accomplished by an inclusion of a relatively low Mooney viscosity specialized trans 1,4-polybutadiene. The tire tread rubber composition is comprised of a blend of the specialized trans 1,4-polybutadiene polymer and cis 1,4-polyisoprene natural rubber optionally together with at least one additional diene-based elastomer in which the natural rubber remains a major portion of the elastomers in the tread rubber composition. A significant aspect of the invention is a partial replacement of natural cis 1,4-polyisoprene rubber in the tread rubber composition. The specialized trans 1,4-polybutadiene polymer has a relatively low Mooney (ML1+4), 100° C., viscosity within a range of 25 to 55. The specialized trans 1,4-polybutadiene polymer has a weight average molecular weight (Mw) of less than 220,000, preferably within a range of from 100,000 to 220,000, a number average molecular weight (Mn) of less than 120,000, preferably within a range of from 60,000 to 120,000 and a microstructure comprised of a trans 1,4-isomeric unit content in a range of from 75 to 85 percent, a cis 1,4-isomeric unit content in a range of from 10 to 20 percent and a vinyl 1,2-content in a range of from 3 to 5 percent.
    • 本发明涉及具有天然橡胶丰富橡胶组合物的胎面的轮胎。 轮胎胎面中天然橡胶的部分替换通过包含相对较低的门尼粘度的特殊的反式1,4-聚丁二烯来实现。 轮胎胎面橡胶组合物由专门的反式1,4-聚丁二烯聚合物和顺式1,4-聚异戊二烯天然橡胶的混合物组成,任选地与至少一种另外的二烯基弹性体共混,其中天然橡胶保留主要部分 胎面橡胶组合物中的弹性体。 本发明的一个重要方面是在胎面橡胶组合物中部分替代天然顺式1,4-聚异戊二烯橡胶。 专用的反式1,4-聚丁二烯聚合物具有相对较低的门尼(ML1 + 4),100℃,粘度在25至55的范围内。专用的反式1,4-聚丁二烯聚合物具有重均分子量( Mw)小于220,000,优选在100,000至220,000的范围内,数均分子量(Mn)小于120,000,优选在60,000至120,000的范围内,以及由反式1,4- 异构单元含量在75至85%的范围内,顺式1,4-异构体单元含量在10至20%范围内,乙烯基1,2-含量在3至5%的范围内。