Olefin polymerization catalyst and olefin polymerization process

Details Olefin polymerization catalyst and olefin polymerization process Olefin polymerization catalyst and olefin polymerization process

1993-08-02

1995-04-18

Pal, Asok

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

Catalyst or precursor therefor

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

502115, 502117, B01J 3114

Patent

active

054078822

ABSTRACT:
A catalyst for polymerization of olefin is provided which comprises (A) a metallocene compound, (B) an organoaluminum compound, and (C) a metal borate or a metal aluminate. The metallocene compound (A) is represented by the general formula (1) below: ##STR1## where Cp.sup.1 and Cp.sup.2 are cyclopentadienyl group; R.sup.1 is an alkylene, arylalkylene, dialkylsilylene, dialkylgermanylene, alkylphosphinediyl, or alkylimino group, R.sup.1 crosslinking Cp.sup.1 and Cp.sup.2 together; m is 0 or 1; M is titanium, zirconium, or hafnium; and R.sup.2 and R.sup.3 are independently hydrogen, halogen, or a hydrocarbon group, an alkoxy group, or an aryloxy group having 1 to 12 carbons, the organic aluminum compound (B) is represented by the general formula (2) below:

REFERENCES:
patent: 5241025 (1993-08-01), Hentky et al.
patent: 5278119 (1994-01-01), Turner et al.
Journal of American Chemical society, vol. 109, No. 13, pp. 4111-4113, R. F., Jordan, et al., "Chemistry of Cationic Zirconium (IV) Benzyl complexes, One Electron Oxidation of dO Organometallics", Feb. 9, 1987.
Journal of American Chemical Society, vol. 110, No. 18, pp. 6255-6256, May 13, 1988, J. A. Ewen, et al., "Syndiospecific Propylene Polymerizations with Group 4 Metallocenes".

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