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    • 9. 发明授权
    • Diene elastomer compositions
    • 二烯弹性体组合物
    • US4647614A
    • 1987-03-03
    • US804843
    • 1985-12-05
    • Hiroyoshi TakaoNobuyuki YoshidaAkio Imai
    • Hiroyoshi TakaoNobuyuki YoshidaAkio Imai
    • C08L7/00B60C1/00C08L9/00C08L9/06C08L21/00C08K3/04C08F136/00C08L47/00
    • C08L9/00B60C1/0016
    • Disclosed is a diene elastomer composition especially suitable as tread rubber of tires which has low rolling resistance and high wet grip in combination. This elastomer composition contains a rubber material comprising an elastomeric polymer component of a butadiene polymer and/or a styrene-butadiene copolymer and a rubbery component. The elastomeric polymer is produced by using an organolithium compound as a polymerization initiator, and has a long chain end concentration (LCEC) of 1.5 or less as defined by the following formula: ##EQU1## wherein .alpha.: total number of terminal groups in long chain molecules per polymer,MW: a value obtained from intrinsic viscosity of the polymer as measured in toluene at 30.degree. C. by the following formulas:MW=70,660 x[.eta.].sup.1.282 for styrene-butadiene copolymer,MW=79,167 x[.eta.].sup.1.443 for butadiene polymer,.beta.i: weight fraction of component i when MW=(MW).sub.i.
    • 公开了一种二烯弹性体组合物,其特别适用于轮胎的胎面橡胶,其组合具有低滚动阻力和高湿抓地力。 该弹性体组合物包含橡胶材料,其包含丁二烯聚合物和/或苯乙烯 - 丁二烯共聚物的弹性体聚合物组分和橡胶组分。 弹性体聚合物通过使用有机锂化合物作为聚合引发剂制备,并且具有如下式所定义的1.5或更小的长链末端浓度(LCEC):其中α:长链中的末端基团的总数 每个聚合物的分子,&upbar&M:由在30℃下在甲苯中测量的聚合物的特性粘度得到的值,通过下列公式:<  对于苯乙烯 - 丁二烯共聚物,M = 70,660×η1.282&& M = 79,167× 丁烯聚合物的η1.443,βi:当&upbar&M =(& upbar&M)时组分i的重量分数i。