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15 条记录 (耗时 0.021 秒)

    Method for reducing and/or preventing production of excessively low density polymer product during polymerization transitions
    1.
    发明授权
    Method for reducing and/or preventing production of excessively low density polymer product during polymerization transitions 有权
    用于在聚合过渡期间减少和/或防止生产过低密度聚合物产物的方法

    公开(公告)号：US07847036B2

    公开(公告)日：2010-12-07

    申请号：US12519484

    申请日：2007-12-12

    申请人： Bruce J. Savatsky ,  Daniel P. Zilker, Jr.

    发明人： Bruce J. Savatsky ,  Daniel P. Zilker, Jr.

    IPC分类号： C08F2/34 ,  C08F210/16

    CPC分类号： C08F10/00 ,  C08F210/16 ,  C08F2400/02 ,  Y10S526/901 ,  Y10S526/905 ,  C08F2/34 ,  C08F2/00 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/08

    摘要： A method for controlling a transition from an initial polymerization reaction to a target polymerization reaction in a manner that reduces significantly the amount of off-grade product having excessively low density produced during the transition, including steps of: during the transition, maintaining a first one of a concentration ratio and a feed ratio at an at least substantially constant value while implementing process changes in an effort to bring produced polymer into compliance with a target specification set and monitoring (without controlling) the other one of the concentration ratio and the feed ratio to generate first data; and during the transition, determining from the first data whether polymer having excessively low density is likely to be produced during the transition, and upon determining that polymer having excessively low density is likely to be produced during the transition, maintaining during the remaining portion of the transition the other ratio at a value that is at least substantially constant while allowing the first ratio to vary is provided.

    摘要翻译： 用于控制从初始聚合反应转变为目标聚合反应的方法，其显着降低在转变期间产生的具有过低密度的低级产物的量，包括以下步骤：在转变期间，保持第一个 浓度比和进料比在至少基本恒定的值的同时，同时实施过程变化，努力使生成的聚合物符合目标规范集和监测（不控制）另一个浓度比和进料比 生成第一个数据; 并且在转变期间，从第一数据确定是否可能在转变期间产生具有过低密度的聚合物，并且在确定在转变期间可能产生密度过低的聚合物时，保持在剩余部分 提供了在允许第一比率变化的同时至少基本上恒定的值的另一比例的转变。

    Shape-shifted magnesium alkoxide component for polymerizing olefins
    6.
    发明授权
    Shape-shifted magnesium alkoxide component for polymerizing olefins 失效
    用于聚合烯烃的形状转化的醇镁组分

    公开(公告)号：US5567665A

    公开(公告)日：1996-10-22

    申请号：US447921

    申请日：1995-05-23

    申请人： Burkhard E. Wagner ,  Daniel P. Zilker, Jr. ,  Robert J. Jorgensen

    发明人： Burkhard E. Wagner ,  Daniel P. Zilker, Jr. ,  Robert J. Jorgensen

    IPC分类号： B01J21/10 ,  B01J37/08 ,  C07C29/68 ,  C07C31/30 ,  C08F4/656 ,  C08F10/00 ,  C08F210/06 ,  C08F210/16

    CPC分类号： C07C31/30 ,  B01J21/10 ,  B01J37/088 ,  C07C29/68 ,  C08F10/00 ,  C08F210/06 ,  C08F210/16 ,  Y10S526/908

    摘要： A process is provided for preparing a shape-shifted catalyst component comprising (1) contacting a dihydrocarbyloxide magnesium compound with carbon dioxide in the presence of a slurrying agent to form a slurry of a carboxylated dihydrocarbyloxide magnesium compound; (2) adding a filler to the slurry either before or after the carboxylation of step (1); (3) spray drying the slurry of step (2) to evaporate the slurrying agent and to produce solid particles of the carboxylated dihydrocarbyloxide magnesium compound incorporating the filler; and, optionally, (4) heating the solid particles to remove carbon dioxide to produce a shape-shifted dihydrocarbyloxide magnesium compound component. A catalyst system using the component and a polymerization process employing the catalyst system are also provided.

    摘要翻译： 提供了一种制备形状转移催化剂组分的方法，其包括（1）在淤浆剂存在下使二氢氧化镁镁化合物与二氧化碳接触以形成羧基化二氢氧化镁镁化合物的浆料; （2）在步骤（1）的羧化之前或之后向浆料中加入填料; （3）喷雾干燥步骤（2）的浆料以蒸发制浆剂并产生掺入填料的羧化二氢氧化镁镁化合物的固体颗粒; 和（4）加热固体颗粒以除去二氧化碳以产生形状转移的二氢氧化镁化合物组分。 还提供了使用该组分的催化剂体系和采用催化剂体系的聚合方法。

    Ethylene/propylene copolymer rubbers
    8.
    发明授权
    Ethylene/propylene copolymer rubbers 失效
    乙烯/丙烯共聚物橡胶

    公开(公告)号：US5342907A

    公开(公告)日：1994-08-30

    申请号：US83616

    申请日：1993-06-28

    申请人： Kevin J. Cann ,  Fathi D. Hussein ,  Kiu H. Lee ,  Daniel P. Zilker, Jr. ,  James W. Nicoletti ,  Xinlai Bai

    发明人： Kevin J. Cann ,  Fathi D. Hussein ,  Kiu H. Lee ,  Daniel P. Zilker, Jr. ,  James W. Nicoletti ,  Xinlai Bai

    IPC分类号： C08F2/34 ,  C08F4/60 ,  C08F4/68 ,  C08F210/00 ,  C08F210/02 ,  C08F210/16

    CPC分类号： C08F210/16 ,  Y10S526/901

    摘要： A process comprising contacting a mixture comprising ethylene, propylene, and, optionally, a diene, in the gas phase, under polymerization conditions, with a catalyst system comprising:(a) a catalyst precursor, in independent or prepolymer form, consisting of vanadium (acetylacetonate).sub.3 ;(b) optionally, a support for said precursor;(c) a cocatalyst consisting essentially of (i) an alkylaluminum halide having the formula AlR.sub.(3-a) X.sub.a wherein each R is independently alkyl having 1 to 14 carbon atoms; each X is independently chlorine, bromine, or iodine; and a is 1 or 2, and (ii) optionally, a trialkylaluminum provided that the molar ratio of alkylaluminum halide to trialkylaluminum is at least about 1.5:1; and(d) optionally, a promoter, which is a chlorinated ester having at least 2 chlorine atoms; a saturated or unsaturated aliphatic halocarbon having at least 3 carbon atoms and at least 6 halogen atoms; or a haloalkyl substituted aromatic hydrocarbon wherein the haloalkyl substituent has at least 3 halogen atoms.

    摘要翻译： 一种方法，包括在气相中在聚合条件下将包含乙烯，丙烯和任选的二烯的混合物与催化剂体系接触，所述催化剂体系包含：（a）催化剂前体，其独立或预聚物形式由钒 乙酰丙酮）3; （b）任选地，所述前体的载体; （c）助催化剂，其基本上由（i）具有式AlR（3-a）Xa的烷基铝卤化物组成，其中每个R独立地为具有1至14个碳原子的烷基; 每个X独立地是氯，溴或碘; 并且a为1或2，和（ii）任选的三烷基铝，条件是卤化烷基铝与三烷基铝的摩尔比为至少约1.5:1; 和（d）任选地，具有至少2个氯原子的氯化酯的促进剂; 具有至少3个碳原子和至少6个卤素原子的饱和或不饱和脂族卤代烃; 或卤代烷基取代的芳族烃，其中卤代烷基取代基具有至少3个卤素原子。