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    • 4. 发明申请
    • Synthesis and use of well-defined, highly-branched saturated hydrocarbon polymers
    • 明确定义的高度支化的饱和烃聚合物的合成和使用
    • US20100227977A1
    • 2010-09-09
    • US12658567
    • 2010-02-05
    • David J. LohseCésar Garcia-FrancoNikos Hadjichristidis
    • David J. LohseCésar Garcia-FrancoNikos Hadjichristidis
    • C08L23/04C08F236/00C08F110/02
    • C08C19/44C08C19/02C08F36/04C08F110/02C08F236/10C08F255/02C08G83/003C08L9/00C08L23/0815C08L51/06C08L101/005C08L2205/14C08L2205/16C08L2666/06C08L2666/02C08L2666/04C08F4/48C08F2500/09
    • The present invention relates to a method to produce highly branched polymers with a polyolefin backbone structure of ethylene and precise control of the nature of the branching. In particular, the distribution of branch length and number of branches can be more precisely controlled via the polymerization method of the present invention. The method comprises using anionic chemistry to make unsaturated polydienes with a well-defined, highly-branched structure, and then hydrogenating these polydienes to form highly branched or dendritic saturated hydrocarbon polymers. Highly branched or dendritic polyethylene, ethylene-propylene copolymer and atactic polypropylene are among the saturated hydrocarbon polymers that can be anionically synthesized via the proper selection of diene monomer type, coupling agent, and hydrogenation conditions. The highly branched or dendritic saturated hydrocarbon polymers of the present invention find application in injection molding and extrusion processes as a minor additive for improving processability of linear polyolefins by delaying the onset of melt fracture, and correspondingly increasing melt throughput rates. An additional benefit is that the mechanical properties of the polyolefinic film, sheet, pipe or fiber produced with minor amounts of highly branched or dendritic saturated hydrocarbon polymers of the present disclosure are not negatively impacted.
    • 本发明涉及一种生产具有乙烯聚烯烃骨架结构的高度支化聚合物的方法,并且精确控制了支化性质。 特别地,可以通过本发明的聚合方法更精确地控制分支长度和分支数的分布。 该方法包括使用阴离子化学制备具有明确定义的高支化结构的不饱和聚二烯,然后将这些聚二烯氢化形成高度支化或树枝状饱和烃聚合物。 高分支或树枝状聚乙烯,乙烯 - 丙烯共聚物和无规立构聚丙烯是通过二烯单体类型,偶联剂和氢化条件的适当选择可阴离子合成的饱和烃聚合物之一。 本发明的高度支化或树枝状饱和烃聚合物可用于注射成型和挤出方法,作为通过延迟熔体破裂开始并改善熔体通过速率来改善线性聚烯烃的加工性的次要添加剂。 另外的好处是,用本发明的少量高支化或树枝状饱和烃聚合物生产的聚烯烃膜,片,管或纤维的机械性能不会受到负面影响。
    • 9. 发明申请
    • Process for Making Dendritic Hydrocarbon Polymers
    • 制备树枝状烃聚合物的方法
    • US20110118420A1
    • 2011-05-19
    • US12904428
    • 2010-10-14
    • David John LohseNikos HadjichristidisAndy Haishung TsouSuzzy C.H. HoPaul Edward Schuenzel
    • David John LohseNikos HadjichristidisAndy Haishung TsouSuzzy C.H. HoPaul Edward Schuenzel
    • C08F8/04C08J3/24
    • C08G83/003C08C19/02C08C19/44C08F8/04C08F36/04C08F297/023C08G81/022C08G83/004C08F4/488
    • A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a polyalkadiene defining a multiplicity of lithiated chain ends; (b) reacting the polyalkadiene with an amount of a tri- or di-functional silane coupling agent to form a dendritic polyalkadiene; and (c) hydrogenating the dendritic polyalkadiene to form a substantially saturated dendritic hydrocarbon polymer. Also a process for process for making a dendritic hydrocarbon polymer, comprising: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a hydrocarbon polymer defining a multiplicity of lithiated chain ends; and (b) reacting the hydrocarbon polymer with an amount of a tri- or di-functional silane coupling agent to form a dendritic hydrocarbon polymer.
    • 制备基本上饱和的树枝状烃聚合物的方法。 该方法具有以下步骤:(a)在二 - 或三官能有机锂引发剂的存在下,在阴离子条件下聚合一定量的一种或多种链烯二烯单体和/或一种或多种链烯基芳族聚合物,以产生限定 锂化链末端的多重性; (b)使聚二烯与一定量的三官能或二官能硅烷偶联剂反应以形成树枝状聚二烯; 和(c)氢化树枝状聚亚烷基二醇以形成基本饱和的树枝状烃聚合物。 还有一种用于制备树枝状烃聚合物的方法,其包括:(a)在二 - 或三官能有机锂存在下,在阴离子条件下聚合一定量的一种或多种链烯二烯单体和/或一种或多种链烯基芳族聚合物 引发剂以产生限定多个锂化链端的烃聚合物; 和(b)使烃聚合物与一定量的三官能或二官能的硅烷偶联剂反应以形成树枝状烃聚合物。