申请人:Sumitomo Rubber Industries, Ltd.
公开号:EP2404944A1
公开(公告)日:2012-01-11
The present invention provides a polar group-containing copolymer which can provide a rubber composition and a winter tire achieving the abrasion resistance, performance on ice, and handling stability on dry roads in a balanced manner. The present invention relates to a polar group-containing copolymer obtainable by copolymerizing a conjugated diene compound and a polar group-containing vinyl compound, wherein the polar group-containing vinyl compound is a compound that has a polymerizable unsaturated bond and a polar group, wherein any one of carbon atoms forming the polymerizable unsaturated bond and a carbon atom linked to the polar group are connected to each other via at least one carbon atom, and wherein a cis content of the double bond portion of the conjugated diene compound in the polar group-containing copolymer is 80 mol% or more.
本发明提供了一种含极性基团的共聚物,该共聚物可提供一种橡胶组合物和一种冬季轮胎,以平衡的方式实现耐磨性、冰上性能和在干燥路面上的操控稳定性。本发明涉及一种含极性基团的共聚物,可通过共聚共轭二烯化合物和含极性基团的乙烯基化合物获得,其中含极性基团的乙烯基化合物是一种具有可聚合不饱和键和极性基团的化合物,形成可聚合不饱和键的碳原子和与极性基团相连的碳原子中的任意一个碳原子通过至少一个碳原子相互连接,并且在含极性基团的共聚物中,共轭二烯化合物双键部分的顺式含量为 80 摩尔%或以上。