Method for producing ethylene polymers

Details Method for producing ethylene polymers Method for producing ethylene polymers

1972-10-30

1977-05-31

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429C, 526115, 526116, 526119, 526121, 526124, 526351, 526352, C08F 402, C08F 1002

Patent

active

040270874

ABSTRACT:
Ethylene can be polymerized or copolymerized by the use of a catalyst prepared by mixing a trivalent metal halide with a metal carbonate or/and a metal hydrogen carbonate, reacting the resulting mixture with a transition metal compound in the presence of an aromatic compound, and activating the resulting solid product with an organoaluminum compound.
By substituting said metal carbonate or/and metal hydrogen carbonate for metal salt hydrates, sulfide hydrates, hydroxides or hydroxide hydrates, or metal oxides in our prior art, drawbacks such as dehydrochlorination in the preparation of catalyst or difficulty in removal of catalyst residue from polymer can be overcome while various advantages in our prior art are still maintained.

REFERENCES:
patent: 2981725 (1961-04-01), Luft et al.
patent: 3647772 (1972-03-01), Kashiwa
patent: 3718636 (1973-02-01), Stevens et al.

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