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    • 6. 发明授权
    • Thermoformable blends of multiblock polymer compositions with polystyrene
    • 多嵌段聚合物组合物与聚苯乙烯的可热成型共混物
    • US5089558A
    • 1992-02-18
    • US646485
    • 1991-01-28
    • James E. HallDaniel F. Graves
    • James E. HallDaniel F. Graves
    • C08L25/02C08L53/02
    • C08L25/02C08L53/02C08L2205/02
    • 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.
    • 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。
    • 7. 发明授权
    • Process for preparation of block copolymers in mixed alkane/cycloalkane solvents
    • 在混合烷烃/环烷烃溶剂中制备嵌段共聚物的方法
    • US06242536B1
    • 2001-06-05
    • US08988925
    • 1997-12-11
    • James E. HallDaniel F. GravesHideo Takeichi
    • James E. HallDaniel F. GravesHideo Takeichi
    • C08F29300
    • C08F297/04
    • 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.
    • 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。
    • 10. 发明授权
    • Method for generating free radical capable polymers using tin or silicon halide compounds
    • 使用锡或卤化硅化合物生成可自由基聚合物的方法
    • US07737218B2
    • 2010-06-15
    • US11618059
    • 2006-12-29
    • James E. HallDavid F. Lawson
    • James E. HallDavid F. Lawson
    • C08L83/00C08L51/08C08L51/00C08L61/04C08L53/00C08F293/00C08F36/00C08F8/18C08F8/00C08F2/38C08C19/44C08G63/48C08K5/00
    • C08F8/42
    • Provided is a method comprising reacting the anionic living end of a polymer with a compound selected from the group consisting of tin halides and silicon halides to produced a polymer with a homolytically cleavable group containing a Sn—C bond or a Si—C bond. An engineered plastic may then be produced by adding the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond to a solvent comprising at least one vinyl monomer; (b) optionally adding at least one additional inert solvent; (c) optionally adding additives selected from the group consisting of extender oils, modifiers, and antioxidants; and (d) initiating polymerization of the at least one vinyl monomer by the use of an initiator and/or heat, wherein a free radical is produced from the polymer containing a homolytically cleavable group containing a Sn—C bond or a Si—C bond.
    • 提供了一种方法,其包括使聚合物的阴离子活性端与选自卤化锡和卤化硅的化合物反应,以制备具有含Sn-C键或Si-C键的均聚裂解基团的聚合物。 然后可以通过将含有含有Sn-C键或Si-C键的均聚裂解基团的聚合物加入到包含至少一种乙烯基单体的溶剂中来制备工程塑料; (b)任选地加入至少一种另外的惰性溶剂; (c)任选地添加选自由增量油,改性剂和抗氧化剂组成的组的添加剂; 和(d)通过使用引发剂和/或加热引发至少一种乙烯基单体的聚合,其中由含有Sn-C键或Si-C键的均聚裂解基团的聚合物产生自由基 。