Preparation of .alpha.-monoolefin homopolymers and copolymers

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

1981-03-03

1985-07-02

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502127, 526351, 526906, C08F 464, C08F 1000

Patent

active

045269440

ABSTRACT:
A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by means of a Ziegler-Natta catalyst system comprising (1) a halide of trivalent titanium, (2) an oxygen compound (ester) having a specific formula and (3) an aluminum-alkyl, the titanium halide (1) and the oxygen compound (2) being milled together before use, wherein the catalyst system employed contains, as a further component, (4) a phenolic compound of the formula ##STR1## where R.sup.3 is C.sub.1 -C.sub.6 -alkyl, R.sup.4 is hydrogen or C.sub.1 -C.sub.6 -alkyl, p is an integer from 0 to 5 and q is an integer from 1 to 5.

REFERENCES:
patent: 4154699 (1979-05-01), Mueller-Tamm et al.
patent: 4260710 (1981-04-01), Staiger et al.

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