Phenolate constrained geometry polymerization catalyst and metho

Details Phenolate constrained geometry polymerization catalyst and metho Phenolate constrained geometry polymerization catalyst and metho

1997-10-15

1999-01-05

Bell, Mark L.

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

Catalyst or precursor therefor

Organic compound containing

502104, 502103, 502108, 502111, 502117, 502128, 526134, 526943, 556 52, B01J 3100, C07F 700, C07F 728, C08F 444

Patent

active

058562583

ABSTRACT:
The subject invention involves a method of preparing and the constrained geometry catalyst thereby prepared of the general formula Ar'R4(O)Ar"R'.sub.4 M(CH.sub.2 Ph).sub.2 where Ar' is a phenyl or naphthyl group; Ar" is a cyclopentadienyl or indenyl group, R and R' are H or alkyl substituents (C.ltoreq.10) and M is Ti, Zr or Hf. The synthetic method involves a simple alkane elimination approach which permits a "one-pot" procedure. The catalyst, when combined with a cocatalyst such as Pb.sub.3 C.sup.+ B(Ar.sub.3.sup.F).sub.4 BAr.sub.3.sup.F or methyl alumoxane where Ar.sup.F is a fluoroaryl group, is an effective catalyst for the polymerization of .alpha.-olefins such as ethylene, propylene and styrene.

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