Process for the polymerization of ethylene or .alpha.-olefins an

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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252429B, 252429C, 526119, 526127, 526133, 526139, 526140, 526141, 526142, 526153, 526351, 526903, 526906, C08F 466, C08F 1006

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041580885

ABSTRACT:
Polymerization of ethylene or .alpha.-olefins is carried out with use of a catalyst comprising a modified titanium component obtained by pulverizing the starting titanium component of Ziegler solid catalysts and subjecting the resultant to a modification treatment through contact with an inert organic solvent or a mixture thereof with a modifier, and an organoaluminum component.
The pulverized product of the starting titanium component is pulverized together with an organoaluminum compound and a small amount of ethylene or .alpha.-olefins thereby controlling the particle size distribution.

REFERENCES:
patent: 3004962 (1961-10-01), Matlack
patent: 3701763 (1972-10-01), Wada et al.
patent: 3850899 (1974-11-01), Wada et al.

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