Process for the polymerization of olefins

Details Process for the polymerization of olefins Process for the polymerization of olefins

1980-12-29

1982-03-23

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, 526125, 526139, 526140, 526141, 526142, 526153, 526351, C08F 402, C08F 1000

Patent

active

043213472

ABSTRACT:
An alpha olefin is polymerized to obtain highly crystalline polymers by subjecting the alpha olefin to polymerization conditions using as a catalyst therefor the reaction product of (A) an aluminum hydrocarbyl treated with an electron donor compound and (B) a support containing chlorine, bromine and magnesium, wherein the molar ratio of bromine to chlorine ranges between about 1:99 to about 50:50, preferably between about 2.5:97.5 to about 20:80, and most preferably between about 2.5:97.5 to about 15:85, obtained by reacting an organo magnesium compound with a mixture of chlorinated and brominated aluminum compounds, the support having been additionally treated with an electron donor compound and with titanium tetrachloride. The molar ratio of magnesium to combined chlorine and bromine in the support is not critical but generally ranges between about 1:1.6 and about 1:2.0, preferably between about 1:1.8 and about 1:2.0.

REFERENCES:
patent: 4104198 (1978-08-01), May, Jr. et al.
patent: 4163831 (1979-08-01), Gessell
patent: 4172050 (1979-10-01), Gessell
patent: 4186107 (1980-01-01), Wagner
patent: 4223117 (1980-09-01), Sano et al.
patent: 4235984 (1980-11-01), Shiga et al.

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