Method for the production of low density copolymers of ethylene

Details Method for the production of low density copolymers of ethylene Method for the production of low density copolymers of ethylene

1977-04-04

1980-02-26

Smith, Edward J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

526 65, 526 73, 526115, 526124, 526125, 526348, 5263486, 526904, C08F 402, C08F25502

Patent

active

041906144

ABSTRACT:
In producing a low density polyethylene by a slurry copolymerization of ethylene and an .alpha.-olefin with use of a catalyst consisting of a magnesium compound-supported titanium and/or vanadium compound and an organoaluminum compound, a certain amount of ethylene is subject to a pre-polymerization in the presence of said catalyst prior to the copolymerization. Successively, the slurry copolymerization of ethylene and an .alpha.-olefin is effected in a low-boiling diluent to obtain a low density polyethylene of 0.925-0.950 in density, covering various grades in a wide range.

REFERENCES:
patent: 3067183 (1962-12-01), Hagemeger et al.
patent: 3780136 (1973-12-01), Khelghatian et al.
patent: 3888835 (1975-06-01), Ito et al.
patent: 3893989 (1975-07-01), Leicht et al.
patent: 3987233 (1976-10-01), Sato et al.
patent: 3993588 (1976-11-01), Thukral

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