05198401 is referenced by 428 patents and cites 11 patents.

Ionic catalyst compositions can be prepared by combining two components. The first component is a bis(cyclopentadienyl) Group IV-B metal complex containing at least one ligand which will combine irreversibly with the second component or at least a portion thereof such as a cation portion thereof. The second component comprises a cation which will irreversibly react with at least one ligand on the Group IV-B metal complex and a non-coordinating anion. The combination of the two components produces an ionic catalyst composition comprising a cationic bis(cyclopentadienyl) Group IV-B metal complex which has a formal coordination number of 3 and a 4+ valence charge and the aforementioned non-coordinating anion. The anion is (i) labile and can be displaced by an olefin, diolefin or acetylenically unsaturated monomer; (ii) has a molecular diameter about or greater than 4 angstroms; (iii) forms stable salts with reducible Lewis acids and protonated Lewis bases; (v) has a negative charge delocalized over the framework on the anion or within the core thereof; (v) is not a reducing or oxidizing agent; and (vi) is a relatively poor nucleophile. These ionic catalyst compositions can be used to polymerize .alpha.-olefins, diolefins and/or acetylenically unsaturated monomers, either alone or in combination, to polymers and copolymers.

Title
Ionic metallocene catalyst compositions
Application Number
11471
Publication Number
5198401
Application Date
July 30, 1991
Publication Date
March 30, 1993
Inventor
Richard R Eckman
Houston
TX, US
Gregory G Hlatky
Houston
TX, US
Howard W Turner
Houston
TX, US
Agent
Ben C Cadenhead
Myron B Kurtzman
M Susan Spiering
Assignee
Exxon Chemical Patents
NJ, US
IPC
C08F 4/643
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