Olefin polymerization process and polymer produced

Details Olefin polymerization process and polymer produced Olefin polymerization process and polymer produced

1993-07-29

1994-09-27

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526113, 526352, 502110, C08F 444

Patent

active

053508165

ABSTRACT:
A polymerization catalyst system is formed by combining an organometal compound and a transition metal compound to produce a catalyst A; and combining catalyst A and a catalyst B comprising a rare earth complex having a formula Cp.sub.n MX.sub.4-n.M'L.sub.x, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with an alkyl or alkyl silyl radical, M is yttrium, scandium or a rare earth metal having an atomic number in the range of 57 to 71, M' is an alkali metal, L is a suitable electron donor ligand, X is a halogen, n is 1 or 2, and x is a number corresponding to the value needed to form a stable complex.
Optionally catalyst A is contacted with a rare earth metal halide.
Optionally catalyst B is contacted with an alkali or alkaline earth metal alkyl.
Optionally a hydrocarbyl aluminum compound can be contacted with catalyst B or with the catalyst system.

REFERENCES:
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4575538 (1986-03-01), Hsieh et al.
patent: 4668773 (1987-05-01), Marks et al.
patent: 4701432 (1987-10-01), Welburn, Jr.
patent: 4801666 (1989-01-01), Marks et al.
patent: 4939217 (1990-07-01), Stricklen
patent: 5028673 (1991-07-01), Pettijohn et al.
patent: 5066739 (1991-11-01), Pettijohn et al.
patent: 5109085 (1992-04-01), Pettijohn et al.
patent: 5110884 (1992-05-01), Pettijohn et al.
"Pentamethylcyclopentadienyl Derivatives of the Trivalent Lanthanide Elements Neodymium, Samarium, and Ytterbium", T. Don Tilley and Richard Andersen, Inorg. Chem. vol. 20, pp. 3267-3270, 1981 (No month available).

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