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    LOW MOLECULAR WEIGHT HIGH-CIS POLYBUTADIENES
    41.
    发明授权
    LOW MOLECULAR WEIGHT HIGH-CIS POLYBUTADIENES 有权
    低分子高顺式含量

    公开(公告)号：EP1189983B1

    公开(公告)日：2010-04-21

    申请号：EP00936192.4

    申请日：2000-05-19

    申请人： Bridgestone Corporation

    发明人： MILLER, H., Jerrold ,  HAMADA, Tatsuro ,  OZAWA, Yoichi ,  PAKDEL, Peyman

    IPC分类号： C08L9/00 ,  C08F36/06 ,  C08F4/54

    CPC分类号： C08L9/00 ,  C08F36/06 ,  Y02T10/862 ,  C08F4/545 ,  C08L2666/08

    摘要： A process for polymerizing 1,3-butadiene into a low molecular weight high-cis polybutadiene is described using a catalyst system comprising: (a) a neodymium-containing compound, (b) an aluminoxane or a trialkyl aluminum compound, (c) an organoaluminum hydride, and (d) a halogen source. A blend of a high molecular weight high-cis polybutadiene and the low molecular weight high-cis polybutadiene is also disclosed for use in pneumatic tire treads. Desirably both the high and the low molecular weight polymers have high cis contents, with the low molecular weight polymer being at least 70 percent cis and the high molecular weight polymer being at least 92 percent cis. Desirably both polymers are made with a neodymium catalyst system. The blends provide a balance of properties including good snow traction, wet traction, and rolling resistance while providing a balance of good physical properties including tension at break, modulus etc.

    RUBBER COMPOSITION AND TIRE USING THE SAME
    42.
    发明公开
    RUBBER COMPOSITION AND TIRE USING THE SAME 有权
    维也纳国家民主共和国

    公开(公告)号：EP1640412A1

    公开(公告)日：2006-03-29

    申请号：EP04746458.1

    申请日：2004-06-25

    申请人： Bridgestone Corporation

    发明人： SUZUKI, Eiju ,  OZAWA, Yoichi

    IPC分类号： C08L9/00 ,  B60C1/00 ,  C08F136/08 ,  C08K3/04 ,  C08K3/36 ,  C08L7/00

    CPC分类号： C08L7/00 ,  B60C1/00 ,  B60C9/02 ,  B60C9/18 ,  B60C11/0008 ,  C08L9/00 ,  Y10T152/10495 ,  C08L2666/08 ,  C08F36/04 ,  C08F4/545

    摘要： This invention relates to a rubber composition including a polyisoprene rubber having a very high cis-1,4-bond content and having an excellent balance between dynamic properties and processability, and more particularly to a rubber composition comprising as a rubber component (A) a synthetic polyisoprene rubber having a cis-1,4-bond content of not less than 99.0%, a 3,4-bond content of not more than 0.5% and a Mooney viscosity ML 1+4 (100°C) of 20-110 and (B) a natural rubber.

    摘要翻译： 本发明涉及一种橡胶组合物，其包含具有非常高的顺式-1,4-键含量并且在动态性能和加工性之间具有优异平衡性的聚异戊二烯橡胶，更具体地说，涉及一种橡胶组合物，其包含橡胶组分（A）a 顺式-1,4-键含量不低于99.0％，3,4-键含量不超过0.5％，门尼粘度ML 1 + 4（100℃）为20-110的合成聚异戊二烯橡胶 和（B）天然橡胶。