Process for producing ethylene copolymers

Details Process for producing ethylene copolymers Process for producing ethylene copolymers

1988-10-20

1991-06-25

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502117, 526129, 526156, 526160, 5263486, 526901, C08F 4648, C08F21002

Patent

active

050267973

ABSTRACT:
A process for producing ethylene copolymers by copolymerizing ethylene with an .alpha.-olefin having 3 to 10 carbon atoms in the gas phase polymerization method in the presence of a catalyst comprising such a solid component, component (A), that a zirconium compound having formed a II-bonding with a conjugated five-membered ring such as bis(cyclopentadienyl)zirconium dichloride is carried on a support of porous particles of a water-insoluble inorganic oxide such as silica which have been preliminarily treated with an alumoxane, and an alumoxane, component (B), characterized in that the alumoxane as the component (B) is in the form of a solution in an aromatic hydrocarbon in a concentration of at least 5% (w/v) and the component (A) and the component (B) are introduced into a polymerization vessel after they have been contacted with each other.

REFERENCES:
patent: 4794096 (1988-12-01), Ewen
patent: 4808561 (1989-02-01), Welborn
patent: 4874734 (1989-10-01), Kioka et al.

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