Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1998-03-26
2000-05-02
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526240, 526279, 526280, 526281, 526283, 526347, C08F 3208, C08F 3004, C08F 3008, C08F 3010
Patent
active
060574100
ABSTRACT:
Polymeric ligands, polymeric metallocenes, and processes for preparing same are provided. The process for preparing polymeric metallocenes comprises reacting a polymeric ligand, a transition metal compound, and an alkali metal compound. In one embodiment, a process for preparing polymeric ligands comprises reacting at least one bridged cyclopentadienyl-type monomer and an initiator under polymerization conditions. In another embodiment, a polymeric ligand is represented by the formula [Q'].sub.n, wherein Q' is a unit containing at least one bridged cyclopentadienyl-type group and wherein n is 1-5000. In another embodiment, a polymeric metallocene is represented by the formula [Q"MX.sub.m ].sub.n, wherein Q" is a unit containing at least one fluorenyl-type group, M is a transition metal, each X is individually a hydrocarbyl group containing 1 to 20 carbon atoms, an alkoxy group containing 1 to 12 carbon atoms, an aryloxy group containing 6 to 20 carbon atoms, a halide, or hydride, m is 2 or 3, and wherein n is 1-5000. Other aspects of the present invention include a catalyst system comprising the polymeric metallocene and an organoaluminoxane, a method for preparing same, and a polymerization process employing the catalyst system.
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Alt Helmut G.
Palackal Syriac J.
Peifer Bernd
Schertl Peter
Welch M. Bruce
Bowman Edward L.
Phillips Petroleum Company
Zitomer Fred
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