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    Radial multi-block copolymers
    3.
    发明申请
    Radial multi-block copolymers 有权
    径向多嵌段共聚物

    公开(公告)号：US20090137704A1

    公开(公告)日：2009-05-28

    申请号：US12313844

    申请日：2008-11-25

    申请人： Jose Manuel Rojas Garcia ,  Gerardo Gutierrez Cruz ,  Norma Alicia Hernandez Beltran

    发明人： Jose Manuel Rojas Garcia ,  Gerardo Gutierrez Cruz ,  Norma Alicia Hernandez Beltran

    IPC分类号： C08L53/00 ,  C08F297/00 ,  C08L95/00

    CPC分类号： C08F297/04 ,  C08F297/044 ,  C08L53/02 ,  C08L2666/02 ,  C08L2666/24 ,  C09J153/02 ,  Y10S525/901

    摘要： A radial multi-block copolymer composition comprising a polystyrene block A1, a hard block A2 comprising another type of monovinylarene monomer, two soft blocks B, and B2 of conjugated diene monomer and a coupling agent, the composition of the radial multi-block copolymer having the structure (B1A1A2B2)nZ, where the weight percent of n=5+ is greater than about 40 and Z is a residue of the coupling agent. A process comprising (a) anionically polymerizing styrene monomer Al, at least one monovinylarene monomer A2 other than styrene, and at least one conjugated diene monomer B1 to form multi-block copolymer chains having the structure (B1A1A2), wherein the amount of monovinylarene monomer A2 is from about 0.5 wt % to about 80 wt % of the total amount to form a hard block A1A2; (b) anionically polymerizing at least one conjugated diene monomer to form copolymer chains having a soft block B2 and a polydienyllithium carbanion at the end of the copolymer chains; (c) adding a metal alkyl coupling promoter, preferably triethylaluminum, after initiating anionic polymerization and before reaching a peak reaction temperature; and (d) mixing in a coupling agent to form a copolymer having a residue (Z) of the coupling agent, wherein the copolymer is a radial multi-block copolymer having the structure (B1A1A2B2)nZ, and wherein the weight percent of n=5+ is greater than about 40. The radial multi-block copolymer has application in pressure-sensitive adhesives, engineering plastics, and polymer-modified asphalts with good control of viscosity and without yellowness.

    摘要翻译： 一种径向多嵌段共聚物组合物，其包含聚苯乙烯嵌段A1，包含另一类型单乙烯基芳烃单体的硬嵌段A2，共轭二烯单体的两个软嵌段B和B2以及偶联剂，所述径向多嵌段共聚物的组成 结构（B1A1A2B2）nZ，其中n = 5 +的重量百分比大于约40，Z是偶联剂的残基。 一种方法，其包括（a）阴离子聚合苯乙烯单体Al，至少一种除苯乙烯以外的单乙烯基芳烃单体A2和至少一种共轭二烯单体B1以形成具有结构（B1A1A2）的多嵌段共聚物链，其中单乙烯基芳烃单体 A2为形成硬块A1A2的总量的约0.5wt％至约80wt％; （b）阴离子聚合至少一种共轭二烯单体以形成在共聚物链末端具有软嵌段B2和聚二烯基锂碳阴离子的共聚物链; （c）在引发阴离子聚合之后并在达到峰值反应温度之前加入金属烷基偶联助剂，优选三乙基铝; 和（d）在偶联剂中混合以形成具有偶联剂残基（Z）的共聚物，其中该共聚物是具有结构（B1A1A2B2）nZ的径向多嵌段共聚物，并且其中n = 5+大于约40.径向多嵌段共聚物可用于压敏粘合剂，工程塑料和聚合物改性沥青，具有良好的粘度控制和无黄色。