Sterically shielded diboron-containing metallocene olefin polymerization catalysts

Title: Sterically shielded diboron-containing metallocene olefin polymerization catalysts

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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.

Inventors:

Marks, Tobin J. ^[1]; Ja, Li ^[2]; Yang, Xinmin ^[1]

(Evanston, IL)
(Chicago, IL)

Issue Date:: 1995-09-05

OSTI Identifier:: 870055

Assignee:: Northwestern University (Evanston, IL) CHO

Patent Number(s):: US 5447895

Application Number:: 08/209,668

Contract Number:: FG02-86ER13511

Research Org:: Northwestern University

Country of Publication:: United States

Language:: English

Subject:: sterically; shielded; diboron-containing; metallocene; olefin; polymerization; catalysts; non-coordinating; anion; preferably; containing; diboron; hydride; combined; cyclopenta-dienyl-substituted; cation; component; zirconocene; useful; catalyst; formula; str1; branched; alkyl; t-butyl; boron hydride; preferably contain; polymerization catalysts; olefin polymerization; containing metal; polymerization catalyst; catalyst component; preferably containing; metallocene olefin; sterically shielded; shielded diboron; non-coordinating anion; olefin polymer; cation component; coordinating anion; /502/526/

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Sterically shielded diboron-containing metallocene olefin polymerization catalysts

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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 as shown in the accompanying diagram where R is branched lower alkyl, such as t-butyl.
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