Manufacture of poly-.alpha.-olefins

Details Manufacture of poly-.alpha.-olefins Manufacture of poly-.alpha.-olefins

1977-03-24

1981-10-20

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526139, 526141, 526142, 526132, 526351, 526906, C08F 466, C08F 1006

Patent

active

042962226

ABSTRACT:
A process for the manufacture of poly-.alpha.-olefins by polymerizing .alpha.-olefins by means of a catalyst system comprising (1) a titanium-containing component obtained from (1.1) a compound of the formula TiCl.sub.3.1/3AlCl.sub.3 and (1.2) an organic electron donor, containing phosphorus, nitrogen and/or oxygen atoms, which has been milled with the compound of the formula TiCl.sub.3.1/3AlCl.sub.3 (1.1), in order to form a complex compound, the milling being carried out without assistants or additives in a vibratory ball mill under specific acceleration conditions and at a temperature which is from 4.degree. to 10.degree. C. below the temperature at which the particles of the material being ground begin to agglomerate, and (2) an aluminum-containing component, in which process the titanium-containing component (1) of the catalyst system used is one which has been treated, after milling and before polymerization, with (i) titanium tetrachloride and (ii) an ether and/or an ester.

REFERENCES:
patent: 3937691 (1976-02-01), Staiger et al.

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