Process for polymerizing 1-olefins with a chromium-containing ca

Details Process for polymerizing 1-olefins with a chromium-containing ca Process for polymerizing 1-olefins with a chromium-containing ca

1979-08-15

1981-02-24

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526352, 526903, C08F 424

Patent

active

042529271

ABSTRACT:
Process for polymerizing ethylene or mixtures of ethylene with up to 40 weight % of other 1-olefin(s) by contacting the monomer with a catalyst (A) in the presence of a catalyst modifier (B), catalyst (A) being prepared by supporting chromium trioxide, or a chromium compound calcinable thereto, on a refractory oxide support material and heat activating, catalyst modifier (B) comprising (1) a trihydrocarbyl aluminum compound and (2) an .alpha., .omega.-aliphatic diene containing a chain of at least 6 carbon atoms. The refractory oxide is preferably silica, alumina, zirconia, thoria or silica-alumina. The trihydrocarbyl aluminum compound is suitably an alkyl, aryl or alkaryl aluminum. The .alpha.,.omega.-diene is peferably 1,5-hexadiene or 1,7-octadiene. The polymerization is preferably carried out under particle form process conditions in a fluid medium.

REFERENCES:
patent: 3351623 (1967-11-01), Walker et al.

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