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65 条记录 (耗时 0.023 秒)

    2,5-substituted tetrahydrofurans as anionic initiator modifiers
    2.
    发明授权
    2,5-substituted tetrahydrofurans as anionic initiator modifiers 失效
    2,5-取代的四氢呋喃作为阴离子引发剂改性剂

    公开(公告)号：US5385994A

    公开(公告)日：1995-01-31

    申请号：US139667

    申请日：1993-10-22

    申请人： Daniel F. Graves ,  James E. Hall ,  William J. Shuttleworth

    发明人： Daniel F. Graves ,  James E. Hall ,  William J. Shuttleworth

    IPC分类号： C07D307/06 ,  C08F4/42 ,  C08F4/48 ,  C08F12/04 ,  C08F297/04

    CPC分类号： C08F297/04 ,  C08F12/04

    摘要： A method for improving the initiation efficiency during the anionic polymerization of 15 to 100 percent weight of a vinyl aromatic hydrocarbon monomers and 0 to 85 percent by weight of a conjugated diene monomer by conducting the polymerization in the presence of a catalytically effective amount of: (a) an organolithium initiator and (b) a 2,5-substituted tetrahydrofuran modifier having the structural formula: ##STR1## wherein R.sub.1 and R.sub.1 ' are independently H or an alkyl group containing 1 to 4 carbon atoms and R.sub.2 and R.sub.2 ' are alkyl group containing 1 to 4 carbon atoms.

    摘要翻译： 通过在催化有效量的存在下进行聚合，提高阴离子聚合中的引发效率的方法：15-100重量％的乙烯基芳族烃单体和0至85重量％的共轭二烯单体， a）有机锂引发剂和（b）具有以下结构式的2,5-取代的四氢呋喃改性剂：其中R1和R1'独立地是H或含有1至4个碳原子的烷基，R2和R2'是烷基 含有1至4个碳原子的基团。

    Thermoformable blends of multiblock polymer compositions with polystyrene
    3.
    发明授权
    Thermoformable blends of multiblock polymer compositions with polystyrene 失效
    多嵌段聚合物组合物与聚苯乙烯的可热成型共混物

    公开(公告)号：US5089558A

    公开(公告)日：1992-02-18

    申请号：US646485

    申请日：1991-01-28

    申请人： James E. Hall ,  Daniel F. Graves

    发明人： James E. Hall ,  Daniel F. Graves

    IPC分类号： C08L25/02 ,  C08L53/02

    CPC分类号： C08L25/02 ,  C08L53/02 ,  C08L2205/02

    摘要： A polymer composition for use in making thermoformed products which comprises a blend of: (1) 20 to 75% by weight of a polyvinylaromatic resin, (2) 20 to 75% by weight of S.sub.1 -(B/S.sub.2).sub.n type block copolymer wherein S.sub.1 and S.sub.2 are vinylaromatic block polymers, B is a diene block polymer, (B/S.sub.2) represents a tapered or non-tapered block copolymer and the S.sub.1 block is 5 to 20% by weight of the block copolymer, (S.sub.1 +S.sub.2) is 65 to 95% by weight of the block copolymer, and the total block styrene content of the block copolymer ranges between 35 and 80% by weight, and (3) 0.5 to 10% by weight a diene-vinylaromatic block copolymer (B'-S') containing 10-60% by weight of the vinylaromatic polymer block.

    摘要翻译： 一种用于制造热成型产品的聚合物组合物，其包含以下混合物：（1）20至75重量％的聚乙烯基芳族树脂，（2）20至75重量％的S1-（B / S2）n型嵌段共聚物 其中S1和S2是乙烯基芳族嵌段聚合物，B是二烯嵌段聚合物，（B / S2）表示锥形或非渐变嵌段共聚物，S1嵌段是嵌段共聚物的5〜20重量％（S1 + S2 ）为嵌段共聚物的65〜95重量％，嵌段共聚物的总嵌段苯乙烯含量为35〜80重量％，（3）0.5〜10重量％的二烯 - 乙烯基芳族嵌段共聚物（B '-S'），其含有10-60重量％的乙烯基芳族聚合物嵌段。

    Method of preparing rubber comprising polymeric compositions and isoprene comprising interpolymers
    4.
    发明授权
    Method of preparing rubber comprising polymeric compositions and isoprene comprising interpolymers 失效
    制备包含聚合物组合物和包含互聚物的异戊二烯的橡胶的方法

    公开(公告)号：US08754169B2

    公开(公告)日：2014-06-17

    申请号：US13616809

    申请日：2012-09-14

    申请人： Mark N. Dedecker ,  James E. Hall ,  Daniel F. Graves

    发明人： Mark N. Dedecker ,  James E. Hall ,  Daniel F. Graves

    IPC分类号： C08F287/00 ,  C08L55/02 ,  C08L9/06

    CPC分类号： C08F287/00

    摘要： A method for forming a rubber-modified polymeric composition includes polymerizing vinyl aromatic monomer within a mixture including the vinyl aromatic monomer and an interpolymer having at least one block of polyisoprene, at lest one block of polystyrene, and at lest one block of polybutadiene to thereby form the rubber-modified polymeric composition, where the interpolymer includes an internal block of polyisoprene.

    摘要翻译： 形成橡胶改性聚合物组合物的方法包括在包含乙烯基芳族单体和互聚物的混合物中聚合乙烯基芳族单体，所述互聚物具有至少一个聚异戊二烯嵌段，至少一个聚苯乙烯嵌段，至少一个聚丁二烯嵌段 形成橡胶改性的聚合物组合物，其中互聚物包括聚异戊二烯的内部嵌段。

    Process for preparation of block copolymers in mixed alkane/cycloalkane solvents
    5.
    发明授权
    Process for preparation of block copolymers in mixed alkane/cycloalkane solvents 失效
    在混合烷烃/环烷烃溶剂中制备嵌段共聚物的方法

    公开(公告)号：US06242536B1

    公开(公告)日：2001-06-05

    申请号：US08988925

    申请日：1997-12-11

    申请人： James E. Hall ,  Daniel F. Graves ,  Hideo Takeichi

    发明人： James E. Hall ,  Daniel F. Graves ,  Hideo Takeichi

    IPC分类号： C08F29300

    CPC分类号： C08F297/04

    摘要： The dispersibility of the initial polystyrene block in forming a S-B-S type of copolymer is improved by first preparing a small block of homopolydiene such as homopolybutadiene as a dispersing agent. Onto this small block of homopolybutadiene, the first block of polystyrene is formed and affixed and thereby made dispersible in a mixture of alkanes and 15 to 60% by weight of cycloalkanes, preferably hexane and cyclohexane. After the preparation of the dispersing agent and the first styrene block, the remaining monomer charges to the reactor are fed in aliphatic hydrocarbon diluents, preferably hexane or technical hexane, thereby greatly reducing the final percentage of cycloalkanes including cyclohexane in the reactor to less than 25% of total dispersing medium. The block copolymers produced according to the present process display a narrow molecular weight distribution and improved tensile strength over block copolymers produced in the absence of the additional cycloalkanes in the solvent system.

    摘要翻译： 初始聚苯乙烯嵌段在形成S-B-S型共聚物中的分散性通过首先制备均聚二烯如小聚丁二烯作为分散剂的小块来改善。 在该小块均聚丁二烯上，形成第一块聚苯乙烯并固化，从而使其分散在烷烃和15至60重量％的环烷烃，优选己烷和环己烷的混合物中。 在分散剂和第一苯乙烯嵌段的制备之后，向脂肪烃稀释剂（优选己烷或工业己烷）中将进料到反应器中的剩余单体进料进料，从而大大降低反应器中包括环己烷在内的环烷烃的最终百分比至小于25 总分散介质的百分比。 根据本发明制备的嵌段共聚物在溶剂体系中不存在另外的环烷烃时产生的嵌段共聚物显示窄的分子量分布和改进的拉伸强度。