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    • 2. 发明授权
    • Functionalized rubbery polymer containing polysiloxane
    • 含有聚硅氧烷的官能化橡胶状聚合物
    • US06558805B2
    • 2003-05-06
    • US09970110
    • 2001-10-03
    • Abderrahim KhadirAdel Farhan HalasaWen-Liang Hsu
    • Abderrahim KhadirAdel Farhan HalasaWen-Liang Hsu
    • B32B904
    • C08G77/442Y10T152/10495Y10T428/31663
    • The present invention relates to an anionic polymerization technique for synthesizing functionalized rubbery polymers containing polysiloxane that have excellent characteristics for utilization in (a) tire tread compounds that are highly loaded with silica, (b) shiny tire side-wall compounds, and (c) tire building bladders having improved mold release characteristics. The rubbery polymers of this invention can optionally be coupled with tin halides or silicon halides to further improve the characteristics of the rubber for use in tire tread compounds. The present invention more specifically discloses a process for synthesizing a rubbery polymer that comprises (1) polymerizing at least one conjugated diolefin monomer to produce a living rubbery polymer, wherein said polymerization is optionally carried out in the presence of a polar modifier, wherein said polymerization is an anionic polymerization that is initiated with an alkylsilyloxy protected functional lithium initiator having a structural formula selected from the group consisting: wherein X represents a group IVa element selected from the group consisting of carbon, silicon, germanium, and tin, wherein Y represents phosphorous or nitrogen, wherein R represents alkyl groups that can be the same or different, wherein the alkyl groups contain from 1 to about 8 carbon atoms, and wherein A represents an alkylene group containing from 1 to about 8 carbon atoms; (2) adding a hexaalkylcyclotrisiloxane monomer to the living rubbery polymer; (3) allowing the hexaalkylcyclotrisiloxane monomer to polymerize to produce a living polysiloxane containing rubber; and optionally, (4) reacting the living polysiloxane containing rubber with a coupling agent selected from the group consisting of tin halides and silicon halides to produce a coupled polysiloxane containing rubber.
    • 本发明涉及一种用于合成含有聚硅氧烷的官能化橡胶聚合物的阴离子聚合技术,其具有优异的(a)高度负载二氧化硅的轮胎胎面胶料,(b)有光泽的轮胎侧壁化合物,(c) 具有改善脱模特性的轮胎成型气囊。 本发明的橡胶状聚合物可以任选与锡卤化物或卤化硅偶联,以进一步改善用于轮胎胎面胶料的橡胶的特性。 本发明更具体地公开了一种合成橡胶状聚合物的方法,其包括(1)聚合至少一种共轭二烯单体以制备活性橡胶状聚合物,其中所述聚合反应任选在极性改性剂存在下进行,其中所述聚合 是由具有选自以下的结构式的烷基甲硅烷氧基保护的官能锂引发剂引发的阴离子聚合:其中X表示选自碳,硅,锗和锡的IVa族元素,其中Y表示磷 或氮,其中R表示可以相同或不同的烷基,其中烷基含有1至约8个碳原子,并且其中A表示含有1至约8个碳原子的亚烷基; (2)向活性橡胶状聚合物中加入六烷基环三硅氧烷单体; (3)使六烷基环三硅氧烷单体聚合以制备含有活性聚硅氧烷的橡胶; 和(4)使含有活性聚硅氧烷的橡胶与选自卤化锡和卤化硅的偶合剂反应,生成含有橡胶的偶联聚硅氧烷。