Olefin polymerization process

Details Olefin polymerization process Olefin polymerization process

1992-11-13

1994-03-29

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526142, 526351, 526352, 526119, 526128, 502111, 502125, 502113, C08J 900

Patent

active

052985792

ABSTRACT:
A method of using a catalyst with a suitable cocatalyst in the polymerization or copolymerization of 1-olefins are disclosed. The catalyst is prepared by: a) contacting a Group IIA organometallic compound, like 2-methylpentanoxymagnesium chloride, or a Group III organometallic compound, like triethylaluminum, or a combination thereof, with a porous or nonporous biodegradable substrate having active surface hydroxyl groups, like cellulose, to provide a modified biodegradable substrate; then b) contacting the modified biodegradable substrate with a transition metal compound, such as a transition metal halide or alkoxide, like titanium tetrachloride or vanadium (V) trichloride oxide, to form discrete catalyst particles. The catalyst particles are used in conjunction with a suitable cocatalyst, like triethylaluminum, in the homopolymerization or copolymerization of 1-olefins. During polymerization, porous biodegradable catalyst particles are fragmented into small solid particles that are trapped within polymer. The fragmented catalyst particles are allowed to remain within the polymer; do not adversely affect the physical or esthetic properties of the polymer or articles made therefrom; and serve as biodegradable sites that facilitate environmental degradation of the polymer.

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