Olefin polymerization method comprising allyl-cycloalkadienyl di

Details Olefin polymerization method comprising allyl-cycloalkadienyl di Olefin polymerization method comprising allyl-cycloalkadienyl di

1997-06-26

1999-06-15

Smith, Jeffery T.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526131, 526170, 526171, 526134, 502117, C08F 444

Patent

active

059123117

ABSTRACT:
A catalyst precursor of the formula: ##STR1## wherein: L is a cycloalkadienyl ligand;
W, X, Y, and Z are independently hydrogen, a hydrocarbyl group containing 1 to 20 carbon atoms, or a silyl group, and may be connected to L through a bridging group comprising at least two Group IVA atoms; with the proviso that one of X, Y, and Z is a negative charge stabilizing group selected from the group consisting of Group IVA trialkyl groups, aryl groups, heteroaromatic groups, ethylenically unsaturated hydrocarbon groups, acetylenically unsaturated hydrocarbon groups, ketonic groups, and aromatic organometallic moieties, is provided. When combined with a compound comprising a metal from Groups IIIB to VIII or the Lanthanide series of the Periodic Table of elements and an activating cocatalyst, the catalyst precursor is useful for the polymerization of olefins.

REFERENCES:
patent: 3422128 (1969-01-01), Wilke et al.
patent: 3475471 (1969-10-01), Maxfield
patent: 5081231 (1992-01-01), Stevens et al.
patent: 5395811 (1995-03-01), Novak et al.

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