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公开(公告)号：US08302643B2
公开(公告)日：2012-11-06
申请号：US12845081
申请日：2010-07-28
CPC分类号： C08L9/00 , B60C1/0016 , B60C11/005 , B60C11/0058 , C08K3/36 , C08L9/06 , C08L15/00 , C08L2666/08
摘要： A pneumatic tire having a rubber tread of a cap/base construction comprised of an outer rubber tread cap layer containing an outer running surface and an underlying rubber tread base layer, wherein said tread cap layer is comprised of a plurality of circumferential, longitudinal rubber tread cap zones of graduated physical properties, wherein said tread cap zones individually extend from said tread cap running surface radially inward to said tread base layer; wherein said tread cap zones are comprised of two primary tread cap zones and one central tread cap zone; wherein said central tread cap zone is positioned between said primary tread cap zones and spans at least 14 percent of the total running surface of the tread cap layer, wherein said primary tread cap zones are of substantially equal widths and collectively span at least 50 percent of the total running surface of the tread cap layer.
摘要翻译： 一种充气轮胎，其具有帽/底座结构的橡胶胎面，其包括外部橡胶胎冠层，其包含外部运行表面和下部橡胶胎面基底层，其中所述胎面覆盖层由多个周向纵向橡胶胎面 具有分级物理性质的帽区域，其中所述胎面覆盖区域从所述胎面胎圈运动表面径向向内分别延伸到所述胎面基底层; 其中所述胎冠区域由两个初级胎冠区域和一个中央胎冠区域组成; 其中所述中心胎冠区域位于所述主胎面胎冠区域之间并且跨越所述胎面覆盖层的总行驶表面的至少14％，其中所述主胎面胎面区域具有基本相等的宽度并且共同跨越至少50％ 胎冠层的总行驶面。
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公开(公告)号：US20120024441A1
公开(公告)日：2012-02-02
申请号：US12845081
申请日：2010-07-28
IPC分类号： B60C11/00
CPC分类号： C08L9/00 , B60C1/0016 , B60C11/005 , B60C11/0058 , C08K3/36 , C08L9/06 , C08L15/00 , C08L2666/08
摘要： The present invention is directed to a pneumatic tire having a rubber tread of a cap/base construction comprised of an outer rubber tread cap layer containing an outer running surface and an underlying rubber tread base layer, wherein said tread cap layer is comprised of a plurality of circumferential, longitudinal rubber tread cap zones of graduated physical properties, wherein said tread cap zones individually extend from said tread cap running surface radially inward to said tread base layer: wherein said tread cap zones are comprised of two primary tread cap zones and one central tread cap zone; wherein said central tread cap zone is positioned between said primary tread cap zones and spans at least 14 percent of the total running surface of the tread cap layer, wherein said primary tread cap zones are of substantially equal widths and collectively span at least 50 percent of the total running surface of the tread cap layer; wherein the central tread cap zone comprises a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A1) from about 60 to about 90 phr of an emulsion or solution polymerized styrene-butadiene rubber with a styrene content of from about 20 to about 40 percent by weight, and a Tg of from about −55° C. to about −20° C.; (A2) from about 40 to about 10 phr of a polybutadiene with a cis 1, 4 content of at least 90 percent, a number average molecular weight (Mn) of greater than 175,000 and a heterogeneity index (Mw/Mn) of less than 2.5; (A3) from about 50 to about 150 phr of silica; wherein the primary tread cap zones comprise a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (B1) from about 60 to about 90 phr of a solution polymerized styrene-butadiene rubber functionalized with an alkoxysilane group and at least one functional group selected from the group consisting of primary amines and thiols; (B2) from about 40 to about 10 phr of polybutadiene having a microstructure comprised of about 96 to about 99 percent cis 1,4-isomeric units, about 0.1 to about 1 percent trans 1,4-isomeric units and from about 1 to about 3 percent vinyl 1,2-isomeric units; a number average molecular weight (Mn) in a range of from about 75,000 to about 150,000 and a heterogeneity index (Mw/Mn) in a range of from about 3/1 to about 5/1; and (B3) from about 50 to about 150 phr of silica.
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