发明名称 Method for improving the grip of a tyre on a snowy and/or icy road, and a winter tyre
摘要 A method for improving tyre grip on snowy and/or icy roads includes forming a tread band with a base elastomeric material comprising at least 70 wt % of a polymer mixture including between 20 wt % and 60 wt % of at least one styrene/1,3-butadiene copolymer and between 40 wt % and 80 wt % of at least one 1,3-butadiene homopolymer. The at least one styrene/1,3-butadiene copolymer comprises styrene units and vinyl units. The at least one 1,3-butadiene homopolymer comprises vinyl units. The glass transition temperature of the at least one styrene/1,3-butadiene copolymer is at least 30° C. higher than that of the at least one 1,3-butadiene homopolymer. A mixture of the at least one styrene/1,3-butadiene copolymer with the at least one 1,3-butadiene homopolymer shows a single glass transition peak having a maximum value corresponding to a temperature greater than or equal to -70° C. and less than or equal to -45° C.
申请公布号 US2007062624(A1) 申请公布日期 2007.03.22
申请号 US20060504096 申请日期 2006.08.15
申请人 PIRELLI PNEUMATICI SPA 发明人 AMADDEO ANGELA;GARRO LUCIANO
分类号 B60C11/00;B60C1/00;C08K3/00;C08K5/54;C08L9/00;C08L9/06 主分类号 B60C11/00
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