Catalyst for the polymerization of olefines and processes for th

Details Catalyst for the polymerization of olefines and processes for th Catalyst for the polymerization of olefines and processes for th

1996-03-27

1998-05-05

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

502125, 502108, 5261248, 5261253, 526904, C08F 4649, C08F 1006

Patent

active

057475954

ABSTRACT:
A catalyst for the polymerization of olefines comprises a solid catalytic component obtained by pre-polymerizing propylene in the presence of (A) a solid component containing magnesium, titanium, halogen and an electron-donating compound, (B) an organoaluminum compound, and (C) an alkylalkoxysilane represented by the formula, R.sup.1 Si(OR.sup.2)(OCH.sub.3).sub.2, wherein R.sup.1 represents a branched or cyclic alkyl group having 3 to 6 carbon atoms, and R.sup.2 represents a branched alkyl, alkenyl or alkinyl group having 3 to 6 carbon atoms; (B) an organoaluminum compound; and (D) an alkyltrialkoxysilane represented by the formula, R.sup.3 Si(OR.sup.4).sub.2 (OCH.sub.3), wherein R.sup.3 represents a linear alkyl group having 3 to 6 carbon atoms, and R.sup.4 represents a branched alkyl, alkenyl or alkinyl group having 3 to 5 carbon atoms.

REFERENCES:
patent: 4990478 (1991-02-01), Hoppin et al.
patent: 5100981 (1992-03-01), Schreck et al.
patent: 5449738 (1995-09-01), Koura et al.
patent: 5473021 (1995-12-01), Koura et al.

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