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31. 发明申请

US20060148994A1 Process for the preparation of block copolymers for tire tread compositions and these copolymers 有权
标题翻译：制备轮胎胎面组合物和这些共聚物的嵌段共聚物的方法
公开(公告)号：US20060148994A1
公开(公告)日：2006-07-06
申请号：US11267259
申请日：2005-11-07
申请人： Pierre Lesage
发明人： Pierre Lesage
IPC分类号： C08F297/02
CPC分类号： C08L53/00 , C08F297/023 , C08F297/044 , C08L53/02 , C08L2666/02
摘要： A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, one at least of said blocks consisting of a polyisoprene and at least one other block consisting of a diene elastomer other than a polyisoprene the molar ratio of units originating from one or more conjugated dienes of which is greater than 15%. The process includes the steps of: (i) copolymerization of one or more monomers comprising a conjugated diene other than isoprene using a catalytic system comprising a hydrocarbon solvent, a compound A of a metal of group IIIA, a compound B of an alkaline-earth metal and a polymer initiator C comprising a C—Li bond which is formed of a monolithiated polyisoprene intended to form the polyisoprene, said polyisoprene block(s) having a number-average molecular weight Mn1 of between 2,500 and 20,000 g/mol, so that said block(s) other than a polyisoprene has/have a content of trans-1,4 linkages equal to or greater than 70% and a number-average molecular weight Mn2 of between 65,000 and 350,000 g/mol, and (ii) addition to the product of copolymerization of a functionalizing, coupling or starring agent comprising one, two or at least three epoxy groups respectively, so that said block other than a polyisoprene is functionalized, coupled or starred.
摘要翻译：一种制备功能化，偶联或加星型嵌段共聚物的方法，其可用于交联状态下具有降低的滞后的硫交联橡胶组合物，至少所述嵌段由聚异戊二烯和至少一种由除了聚异戊二烯以外的二烯弹性体组成的其它嵌段，源自一种或多种共轭二烯的单元的摩尔比大于15％。该方法包括以下步骤：（i）使用包含烃溶剂，IIIA族金属的化合物A，碱土金属化合物B的催化体系，共聚一种或多种包含异戊二烯以外的共轭二烯的单体金属和聚合物引发剂C，其包含由旨在形成所述聚异戊二烯的聚酯聚异戊二烯形成的C-Li键，所述聚异戊二烯嵌段的数均分子量M N 2≤2,500 和20,000g / mol，使得除聚异戊二烯之外的所述嵌段具有等于或大于70％的反式-1,4键含量和数均分子量M N 2，和（ii）分别加入包含一个，两个或至少三个环氧基团的官能化，偶联或引发剂的共聚产物，使得除聚异戊二烯以外的所述嵌段是功能化，耦合或加星标。

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