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    Rubber composition for tire treads
    1.
    发明公开
    Rubber composition for tire treads 失效
    轮胎胎面用橡胶组合物

    公开(公告)号：EP0270927A2

    公开(公告)日：1988-06-15

    申请号：EP87117437.1

    申请日：1987-11-26

    申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  SUMITOMO RUBBER INDUSTRIES LIMITED

    发明人： Saito, Yuichi ,  Yabuta, Takuzoh ,  Takao, Hiroyoshi ,  Imai, Akio ,  Tsuji, Mitsuji

    IPC分类号： C08F297/04 ,  B60C1/00 ,  C08G81/02

    CPC分类号： C08L21/00 ,  B60C1/0016 ,  C08F297/044 ,  C08L9/06 ,  C08L53/02 ,  C08L2666/24 ,  C08L2666/08

    摘要： A rubber composition suitable for tire treads having well-balanced excellent steering stability in cornering, wet skid characteristic, ice skid characteristic and rolling characteristic, and an excellent processability, which comprises a rubber component containing a block copolymer consisting essentially of a block A and a block B, obtained by conducting polymerization of an aromatic vinyl compound and a conjugated diene compound in a hydrocarbon solvent in the presence of an organolithium initiator and modifying with a coupling agent, and satisfying the following conditions (A) to (E);

    (A) the block A having a content of an aromatic vinyl compound of 5 to 20 % by weight and a content of 1,2-bonds in the conjugated diene component of 25 to 55 % by weight,
    (B) the block B having a content of an aromatic vinyl compound of 35 to 60 % by weight and a content of 1,2-bonds in the conjugated diene component of 20 to 70 % by weight,
    (C) the content of the block A in the block copolymer being from 20 to 80 % by weight,
    (D) the average content of the aromatic vinyl compound in the block copolymer being from 20 to 40 % by weight and the average content of 1,2-bonds in the conjugated diene component of the block copolymer being from 20 to 60 % by weight, and
    (E) at least 40 % by weight of the polymer chains of the block copolymer being a branched polymer formed by modification with a trifunctional or tetrafunctional coupling agent.

    摘要翻译： 一种适用于轮胎胎面的橡胶组合物，该组合物在转弯，湿滑特性，防冰特性和滚动特性方面具有良好的平衡优异操纵稳定性和优异的可加工性，该橡胶组合物包含含有基本上由嵌段A和 嵌段B，通过在有机锂引发剂存在下在烃溶剂中使芳香族乙烯基化合物和共轭二烯化合物聚合并用偶联剂进行改性而获得，并且满足以下条件（A）至（E）; （A）芳香族乙烯基化合物的含量为5〜20重量％，共轭二烯成分中的1,2-键含量为25〜55重量％的嵌段A，（B）嵌段B具有 芳香族乙烯基化合物的含量为35〜60重量％，共轭二烯成分中的1,2-键含量为20〜70重量％，（C）嵌段共聚物中嵌段A的含量为 （D）嵌段共聚物中的芳香族乙烯基化合物的平均含量为20〜40重量％，嵌段共聚物的共轭二烯成分中的1,2-键的平均含量为20〜80重量％ （E）嵌段共聚物的聚合物链的至少40重量％是通过用三官能或四官能偶联剂改性形成的支化聚合物。

    Rubber composition for tire treads
    6.
    发明公开
    Rubber composition for tire treads 失效

    公开(公告)号：EP0270927A3

    公开(公告)日：1989-08-02

    申请号：EP87117437.1

    申请日：1987-11-26

    申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  SUMITOMO RUBBER INDUSTRIES LIMITED

    发明人： Saito, Yuichi ,  Yabuta, Takuzoh ,  Takao, Hiroyoshi ,  Imai, Akio ,  Tsuji, Mitsuji

    IPC分类号： C08F297/04 ,  B60C1/00 ,  C08G81/02

    CPC分类号： C08L21/00 ,  B60C1/0016 ,  C08F297/044 ,  C08L9/06 ,  C08L53/02 ,  C08L2666/24 ,  C08L2666/08

    摘要： A rubber composition suitable for tire treads having well-balanced excellent steering stability in cornering, wet skid characteristic, ice skid characteristic and rolling characteristic, and an excellent processability, which comprises a rubber component containing a block copolymer consisting essentially of a block A and a block B, obtained by conducting polymerization of an aromatic vinyl compound and a conjugated diene compound in a hydrocarbon solvent in the presence of an organolithium initiator and modifying with a coupling agent, and satisfying the following conditions (A) to (E);
    (A) the block A having a content of an aromatic vinyl compound of 5 to 20 % by weight and a content of 1,2-bonds in the conjugated diene component of 25 to 55 % by weight, (B) the block B having a content of an aromatic vinyl compound of 35 to 60 % by weight and a content of 1,2-bonds in the conjugated diene component of 20 to 70 % by weight, (C) the content of the block A in the block copolymer being from 20 to 80 % by weight, (D) the average content of the aromatic vinyl compound in the block copolymer being from 20 to 40 % by weight and the average content of 1,2-bonds in the conjugated diene component of the block copolymer being from 20 to 60 % by weight, and (E) at least 40 % by weight of the polymer chains of the block copolymer being a branched polymer formed by modification with a trifunctional or tetrafunctional coupling agent.

    A process for producing a modified ethylene-alpha-olefin copolymer rubber
    10.
    发明公开
    A process for producing a modified ethylene-alpha-olefin copolymer rubber 失效
    改性乙烯 - 丙烯共聚物橡胶及其制造方法

    公开(公告)号：EP0268985A3

    公开(公告)日：1990-03-21

    申请号：EP87116991.8

    申请日：1987-11-17

    申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

    发明人： Takao, Hiroyoshi ,  Imai, Akio ,  Tsuji, Mitsuji

    IPC分类号： C08F255/02 ,  C08F2/02

    CPC分类号： C08F255/02 ,  C08F212/00 ,  C08F222/06

    摘要： A modified copolymer rubber obtained by kneading at 200-280°C
    (A) at least one copolymer rubber material selected from the group consisting of an ethylene-α-olefin copolymer rubber having a number-average molecular weight of 10,000-100,000 and an ethylene content of 15-85% by weight and an ethylene-α-olefin-nonconjugated diene copolymer rubber having a number-average molecular weight of 10,000-100,000, an ethylene content of 15-85% by weight and a nonconjugated diene content of 3.0% by weight or less, (B) a free-radical initiator, (C) at least one vinyl aromatic monomer and (D) an unsaturated dicarboxylic anhydride, the bound vinyl aromatic monomer content and the bound unsaturated dicarboxylic anhydride content in the modified copolymer rubber being 0.1-5% by weight and 0.1-5% by weight, respectively, based on the weight of the copolymer rubber material and a process for producing the same are disclosed. This modified copolymer rubber obtained has so excellent properties such as a high bound unsaturated dicarboxylic anhydride content, a low gel formation property, a low tendency of increase of the Mooney viscosity [ML 1+4 (121°C)], and an excellent moldability and storage stability that it can be suitably used for thermoplastic elastomer, blending polymer, adhesive etc.