Polymerization of .alpha.-olefin monomers

Details Polymerization of .alpha.-olefin monomers Polymerization of .alpha.-olefin monomers

1977-06-20

1979-08-28

Holler, Alan

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526151, 526152, 526159, 526164, 526901, 526903, 526904, 526906, 526907, 526908, C08F 234, C08F 464, C08F 1000

Patent

active

041661672

ABSTRACT:
Gas-phase polymerization of an .alpha.-olefin, especially propylene, in a stirred or fluidized bed of substantially uniform and approximately spherical carrier particles of an .alpha.-olefin polymer of diameter 100-500 .mu.m, using a catalyst comprising an organo-metallic compound and a solid transition metal compound which has a particle size of less than 5 .mu.m, produces a propylene polymer having unexpectedly good powder flow characteristics. The transition metal compound is conveniently a titanium trichloride-containing material which has been treated with a dialkyl ether solution.

REFERENCES:
patent: 2968652 (1961-01-01), Mertes
patent: 3041325 (1962-06-01), Farnham
patent: 3575948 (1971-04-01), Blunt
patent: 3752797 (1973-08-01), Gordon et al.
patent: 3772261 (1973-11-01), Faltings et al.
patent: 3925338 (1975-12-01), Ort
patent: 4065609 (1977-12-01), Willmore
Derwent-31,245Q-Abstract of Russian Pat. 215,503.
Derwent-72994U-Abstract of Japanese Pat. Application 48-59186.

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