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    • 7. 发明授权
    • Modified polymers prepared with lanthanide-based catalysts
    • US06977281B1
    • 2005-12-20
    • US10296082
    • 2000-11-10
    • Yoichi OzawaH. Jerrold MillerKoji Masaki
    • Yoichi OzawaH. Jerrold MillerKoji Masaki
    • C08C19/22C08C19/44C08F8/30C08F136/04C08L19/00
    • C08C19/44C08F136/04C08L19/006C08F4/545
    • A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, where said pseudo-living polymer is characterized by having greater than about 85 percent of the polymer in the cis microstructure and less than about 3 percent of the polymer is in the 1,2- or 3,4-microstructure, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I) or (II) where Z is a substituent that will react or interact with organic or inorganic fillers; R1 is a single bond or a divalent organic group; R2 is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R13 or R14; R3 is a single bond, a divalent organic group, or a trivalent organic group that forms a cyclic organic group with R4 or R5; R13 is a single bond, a divalent organic group, or a trivalent organic group that forms a cyclic organic group with R2 or R14; R4 is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R3 or R5; R14 is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R2 or R13; and R5 is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R3 or R4; with the proviso that each group attached to the imino carbon is attached via a carbon atom and R1, R2, R3, R4, R5, R13, R14 and Z are substituents that will not protonate a pseudo-living polymer.
    • 9. 发明授权
    • Low molecular weight high-cis polybutadienes and their use in high molecular weight-low molecular weight high-cis polybutadiene blends
    • 低分子量高顺式聚丁二烯及其在高分子量低分子量高顺式聚丁二烯共混物中的应用
    • US06437205B1
    • 2002-08-20
    • US09600150
    • 2000-07-10
    • H. Jerrold MillerTatsuro HamadaYoichi OzawaPeyman Pakdel
    • H. Jerrold MillerTatsuro HamadaYoichi OzawaPeyman Pakdel
    • C10L116
    • C08L9/00C08F36/06Y02T10/862C08F4/545C08L2666/08
    • 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.
    • 使用催化剂体系描述了将1,3-丁二烯聚合成低分子量高顺式聚丁二烯的方法,该催化剂体系包含:(a)含钕化合物,(b)铝氧烷或三烷基铝化合物,(c) 有机铝氢化物,(d)卤素源。 还公开了高分子量高顺式聚丁二烯和低分子量高顺式聚丁二烯的共混物用于充气轮胎胎面。 高分子量聚合物和低分子量聚合物理想地具有高顺式含量,低分子量聚合物为顺式至少70%,高分子量聚合物为顺式至少92%。 理想地,两种聚合物都是用钕催化剂体系制成的。 混合物提供了平衡的性能,包括良好的积雪牵引力,湿牵引力和滚动阻力,同时提供良好的物理性能,包括断裂张力,模量等的平衡。