Manufacture of homopolymers and copolymers of .alpha.-monoolefin

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

1978-04-28

1980-02-19

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252431R, 526139, 526141, 526142, 526351, 526903, 526906, 526907, C08F 464

Patent

active

041895576

ABSTRACT:
A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins by polymerizing the monomer or monomers by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminum-alkyl component, wherein the titanium trichloride component (I) employed is obtained by (1) in a first stage moistening a suitable conventional catalyst component, consisting entirely or substantially of titanium trichloride, with a hydrocarbon mixture comprising a liquid alkane hydrocarbon and a liquid benzene hydrocarbon and (2) in a second stage drying the catalyst component, moistened with the hydrocarbon mixture, under an inert gas, with constant mechanical mixing, within a certain period, at a temperature which is from 5.degree. to 50.degree. C. above the boiling point of the highest-boiling hydrocarbon present in the hydrocarbon mixture which has been used to moisten the component. Homopolymers and copolymers having particularly advantageous morphological properties can be manufactured by the process of the invention.

REFERENCES:
patent: 3130004 (1964-04-01), Siggel et al.
patent: 3130005 (1964-04-01), Siggel et al.
patent: 3701763 (1972-10-01), Wada et al.
patent: 3850899 (1974-11-01), Wada et al.
patent: 3926848 (1975-12-01), Wristers et al.
patent: 3979372 (1976-09-01), van der Bend et al.
patent: 4048415 (1977-09-01), Matsuzawa et al.

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