Process for the polymerization of ethylene or alpha-olefins and

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, 526116, 526119, 526125, 526127, 526129, 526132, 526133, 526139, 526140, 526141, 526142, 526143, 526156, 526159, 526904, C08F 466, C08F 1006

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041873858

ABSTRACT:
Polymerization of ethylene or .alpha.-olefins using a catalyst comprising a titanium component obtained by copulverizing the starting titanium component of Ziegler catalysts and organoaluminum compound with a small amount of ethylene or .alpha.-olefins, and an organoaluminum component. The titanium catalyst component can be modified by subjecting the copulverized titanium component to a contact with an inert organic solvent or its mixture with a modifier (1) an oxygen-, sulphur-, phosphor-, nitrogen- or silicon- containing organic compound, (2) a combination of such an organic compound and an aluminum halide, (3) an organoaluminum compound or (4) a Lewis acid.

REFERENCES:
patent: 3004962 (1961-10-01), Matlack
patent: 3014016 (1961-12-01), Natta et al.
patent: 3984350 (1976-10-01), Karayannis et al.
patent: 4028481 (1977-06-01), Shiomura et al.

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