Sterically shielded diboron-containing metallocene olefin polyme

Details Sterically shielded diboron-containing metallocene olefin polyme Sterically shielded diboron-containing metallocene olefin polyme

1994-03-10

1995-09-05

Beck, Shrive

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502103, 502118, 502202, B01J 3116

Patent

active

054478952

ABSTRACT:
A non-coordinating anion, preferably containing a sterically shielded diboron hydride, if combined with a cyclopenta-dienyl-substituted metallocene cation component, such as a zirconocene metallocene, is a useful olefin polymerization catalyst component. The anion preferably has the formula ##STR1## where R is branched lower alkyl, such as t-butyl.

REFERENCES:
patent: 5153157 (1992-10-01), Hlatky et al.
patent: 5278119 (1994-01-01), Turner et al.
Organometallics 1991, 10, 840-842.
J. Am. Chem. Soc. 1991, 113, 3623-3625.
J. Am. Chem. Soc. 1991, 113, 8569-8570.
J. Am. Chem. Soc. 1991, 113, 8570-8571.

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