Homogeneous catalyst system for producing ethylene...

Details Homogeneous catalyst system for producing ethylene... Homogeneous catalyst system for producing ethylene...

2011-07-26

2011-07-26

Lee, Rip A. (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S160000, C526S170000, C526S172000, C526S134000, C526S131000, C526S148000, C526S153000, C526S151000, C526S348000, C526S352000, C526S348600, C526S348500, C526S348300, C526S348200, C502S113000, C502S114000, C502S132000

Reexamination Certificate

active

07985817

ABSTRACT:
Disclosed is a homogeneous catalyst system for producing an ethylene homopolymer or an ethylene copolymer with α-olefin. Specifically, this invention pertains to a transition metal catalyst which has stability under high temperature solution polymerization at 120˜250° C., in which a cyclopentadiene derivative and an electron donating substituent, both of which are bonded to a Group IV transition metal acting as a central metal, are crosslinked through a silyl derivative substituted with a cyclohexyl, to a catalyst system including such a transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and to a method of producing an ethylene homopolymer or an ethylene copolymer with α-olefin, having high molecular weight, using the catalyst system under conditions of high-temperature solution polymerization. The catalyst according to this invention has excellent thermal stability and compatibility with a paraffin hydrocarbon solvent and thus is effective in the production of an ethylene homopolymer or an ethylene copolymer with α-olefin having various properties in commercial polymerization processes.

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Oh et al., JP 2002-030109 (Jan. 2002); abstract and translation in English.

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