Preparation of homopolymers and copolymers of .alpha.-monoolefin

Details Preparation of homopolymers and copolymers of .alpha.-monoolefin Preparation of homopolymers and copolymers of .alpha.-monoolefin

1983-11-03

1989-09-05

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502113, 526114, 526129, 5263485, 526352, C08F 464, C08F 1000

Patent

active

048640050

ABSTRACT:
A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by polymerization of the monomer or monomers using a Ziegler catalyst system comprising (1) a transition metal catalyst component and (2) an organoaluminum catalyst component, in which the transition metal catalyst component (1) employed is a solid-phase product (VI) obtained by (1.1) first bringing (1.1.1) a finely divided, porous, inorganic oxidic substance (I) as the carrier, and (1.1.2) a solution (II), as obtained on combining (IIa) an alcohol and (IIb) a transition metal composition, into contact with one another to form a suspension (III), evaporating this suspension to dryness (formation of a solid-phase intermediate (IV)) and (1.2) then (1.2.1) bringing the solid-phase intermediate (IV) obtained from stage (1.1), and (1.2.2) a solution of an organoaluminum compound (V) in an organic solvent, into contact with one another to form a suspension, the resulting suspended solid-phase product (VI) being transition metal catalyst component (1), wherein the transition metal catalyst component (1) employed in a solid-phase product (VI) obtained using a transition metal composition (IIb) comprising (IIb1) a vanadium trihalide, (IIb2) a titanium trihalide and (IIb3) a zirconium tetrahalide.

REFERENCES:
patent: 3678025 (1972-07-01), Binell
patent: 4154701 (1979-05-01), Milquist
patent: 4368305 (1983-01-01), Tanaka et al.

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