Preparation of alpha-olefin polymers of relatively narrow molecu

Details Preparation of alpha-olefin polymers of relatively narrow molecu Preparation of alpha-olefin polymers of relatively narrow molecu

1987-02-20

1988-07-26

Garvin, Patrick P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526142, 526156, 5263485, 526901, C08F 464

Patent

active

047601213

ABSTRACT:
A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier containing OH groups with a liquid solution containing an excess of an organomagnesium composition with respect to the OH groups and contacting the thus-formed magnesium-containing carrier with a solution of at least one transition metal compound. Prior to contacting the magnesium-containing carrier with the transition metal compound, most of the liquid must be removed therefrom, so that it comprises not more than about 6% of the liquid. The amount of the transition metal compound is such that the molar ratio of the transition metal to magnesium in the reaction mixture is about 0.3 to about 0.9. Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention.

REFERENCES:
patent: 4370456 (1983-01-01), George
patent: 4405495 (1983-09-01), Lee et al.
patent: 4481301 (1984-11-01), Nowlin et al.
patent: 4618662 (1986-10-01), Nowlin
patent: 4657996 (1987-04-01), Iwabuchi et al.

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