Process for polymerization of butene

Details Process for polymerization of butene Process for polymerization of butene

1979-11-21

1980-12-16

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263482, 5263483, 5263485, 5263486, 526922, C08F 214, C08F11008

Patent

active

042398711

ABSTRACT:
A process for the polymerization of butene-1 in a liquid aliphatic hydrocarbon medium in the presence of a catalyst composed of a titanium trihalide and an organoaluminum compound which comprises initially polymerizing a minor part of the butene-1 at a temperature within a range sufficiently low that a slurry of polymer in said medium is produced and then increasing the temperature of polymerization so that the greater part of the butene-1 is polymerized within a high temperature range higher than that of the initial polymerization but not at a temperature so high that the polymer formed dissolves in said medium, characterized in that (1) the initial polymerization is carried out at a temperature of not more than 20.degree. C. in the presence of said titanium trihalide in an amount of not less than 50 millimoles and up to 1,000 millimoles per liter of said medium, and then (2) the polymerization is carried out in the presence or absence of said medium at a temperature of 25.degree. C. to less than 48.degree. C. in the presence of said titanium trihalide in an amount up to one-fifth of that of the initial polymerization.

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