公开(公告)号：US5912202A

公开(公告)日：1999-06-15

申请号：US781196

申请日：1997-01-10

申请人： John Henry Oskam ,  Thomas Henry Peterson ,  David James Schreck ,  Purna Chand Sishta ,  Timothy Todd Wenzel ,  Gregory Todd Whiteker ,  Clark Curtis Williams

发明人： John Henry Oskam ,  Thomas Henry Peterson ,  David James Schreck ,  Purna Chand Sishta ,  Timothy Todd Wenzel ,  Gregory Todd Whiteker ,  Clark Curtis Williams

IPC分类号： C08F4/651 ,  C08F4/609 ,  C08F4/64 ,  C08F4/6592 ,  C08F10/00 ,  C08F210/16

CPC分类号： C08F10/00 ,  C08F210/16 ,  C08F4/6592 ,  C08F4/65922 ,  Y10S526/943

摘要： A method for preparing an activated catalyst composition comprising a single site catalyst precursor and an activating cocatalyst, which comprises contacting outside of a polymerization reactor a single site catalyst precursor with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with a weakly coordinating electron donor such as 1-hexene.

摘要翻译： 一种制备包含单中心催化剂前体和活化助催化剂的活化催化剂组合物的方法，其包括在将单一位点催化剂前体与一个位点催化剂前体接触之前，期间或之后与聚合反应器的外部接触一单位催化剂前体与活化助催化剂 弱配位电子给体如1-己烯。

公开(公告)号：US6166154A

公开(公告)日：2000-12-26

申请号：US312086

申请日：1999-05-15

申请人： John Henry Oskam ,  Thomas Henry Peterson ,  David James Schreck ,  Purna Chand Sishta ,  Timothy Todd Wenzel ,  Gregory Todd Whiteker ,  Clark Curtis Williams

发明人： John Henry Oskam ,  Thomas Henry Peterson ,  David James Schreck ,  Purna Chand Sishta ,  Timothy Todd Wenzel ,  Gregory Todd Whiteker ,  Clark Curtis Williams

IPC分类号： C08F4/651 ,  C08F4/609 ,  C08F4/64 ,  C08F4/6592 ,  C08F10/00 ,  C08F210/16 ,  C08F4/42

CPC分类号： C08F10/00 ,  C08F4/6592 ,  C08F4/65922 ,  C08F210/16 ,  Y10S526/943 ,  C08F4/64058 ,  C08F4/65912 ,  C08F210/14 ,  C08F2500/12 ,  C08F4/7027

摘要： The invention relates to a process for the polymerization of olifins in the presence of an activated catalyst composition comprising a single site catalyst precursor and an activating cocatalyst, which comprises contacting outside of a polymerization reactor a single site catalyst precursor with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with a weakly coordinating electron donor that does not substantially polymerize during either contacting.

摘要翻译： 本发明涉及一种在包含单中心催化剂前体和活化助催化剂的活化催化剂组合物存在下聚合奥利芬的方法，其包括在聚合反应器外部与单活性催化剂前体与活化助催化剂在 或者在将单一位点催化剂前体与在两种接触期间基本上不聚合的弱配位电子给体接触之后。

公开(公告)号：US5852143A

公开(公告)日：1998-12-22

申请号：US838182

申请日：1997-04-16

申请人： Purna Chand Sishta ,  Eric Paul Wasserman ,  Frederick John Karol

发明人： Purna Chand Sishta ,  Eric Paul Wasserman ,  Frederick John Karol

IPC分类号： C08F2/34 ,  C08F4/60 ,  C08F4/64 ,  C08F4/642 ,  C08F4/659 ,  C08F4/6592 ,  C08F10/00 ,  C08F210/02 ,  C08F210/16

CPC分类号： C08F10/00 ,  C08F210/16 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65927 ,  Y10S526/901 ,  Y10S526/943

摘要： Polyethylene having a broad molecular weight distribution, a narrow comonomer distribution and excellent processability is easily and cost effectively made using stereoisomeric mixtures of bridged metallocene catalysts containing cycloalkadienyl ligands with facial chirality.

摘要翻译： 具有宽分子量分布，窄共聚单体分布和优异加工性能的聚乙烯使用含有环链二烯基配体的桥连金属茂催化剂与面部手性的立体异构体混合物容易且经济地进行。

公开(公告)号：US06177527B1

公开(公告)日：2001-01-23

申请号：US09149579

申请日：1998-09-08

申请人： Purna Chand Sishta ,  Xinmin Yang ,  Frederick John Karol

发明人： Purna Chand Sishta ,  Xinmin Yang ,  Frederick John Karol

IPC分类号： C08F452

CPC分类号： C08F10/00 ,  C08F4/65908 ,  C08F4/65912 ,  C08F110/02 ,  C08F110/06 ,  C08F4/65927 ,  C08F2500/03 ,  C08F2500/15

摘要： A process for the preparation of (i) polyethylene or (ii) polypropylene, which is essentially isotactic or a mixture of atactic and isotactic polypropylenes comprising contacting ethylene or propylene per se, or in admixture with one or more alpha-olefins, under polymerization conditions, with a catalyst system comprising: (a) a precatalyst comprising a mixture of racemic and meso stereoisomers of a metallocene catalyst containing two cycloalkadienyl ligands joined by a bridging linkage, said ligands complexed to a metal atom; and (b) (1) to obtain polyethylene catalyzed by the rac epimer only, a cocatalyst selected from the group consisting of tris(perfluorophenyl)borane and isobutyl alumoxane;  (2) to obtain polyethylene catalyzed by both the rac and the meso epimers, a cocatalyst selected from the group consisting of dimethylanilinium tetrakis(perfluorophenyl)borate and triphenylmethyl tetrakis(perfluorophenyl)borate;  (3) to obtain polypropylene, which is essentially isotactic, a cocatalyst selected from the group consisting of tris(perfluorophenyl)borane and isobutyl alumoxane;  (4) to obtain polypropylene, which is a mixture of atactic and isotactic polypropylenes in a weight ratio of atactic to isotactic polypropylenes of about 0.01:1 to about 1:1, a cocatalyst selected from the group consisting of dimethylanilinium tetrakis(perfluorophenyl)borate and triphenylmethyl tetrakis(perfluorophenyl)borate.

摘要翻译： 一种制备（i）聚乙烯或（ii）聚丙烯的方法，其基本上是全同立构的，或无规立构和全同立构聚丙烯的混合物，包括在聚合条件下使乙烯或丙烯本身接触或与一种或多种α-烯烃混合 催化剂体系包括：（a）预催化剂，其包含茂金属催化剂的外消旋和内立体异构体的混合物，所述茂金属催化剂含有通过桥连键连接的两个环二烯基配体，所述配体与金属原子络合; 和（b）（1）获得由外消旋差向异构体催化的聚乙烯，选自三（全氟苯基）硼烷和异丁基铝氧烷的助催化剂; （2）获得由外消旋和中等差向异构体催化的聚乙烯，选自四（全氟苯基）硼酸二甲基苯铵和四（全氟苯基）硼酸三苯基甲酯的助催化剂; （3）得到选自三（全氟苯基）硼烷和异丁基铝氧烷的助催化剂基本上是全同立构的聚丙烯; （4）得到无规立构聚丙烯与全同立构聚丙烯的重量比为约0.01:1至约1:1的无规立构聚丙烯的混合物的聚丙烯，选自四（全氟苯基）硼酸二甲基苯铵 和四（全氟苯基）硼酸三苯基甲酯。