Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-05-08
2007-05-08
Lu, Caixia (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S140000, C526S142000, C526S165000, C502S103000, C502S114000, C502S128000, C502S132000
Reexamination Certificate
active
11158719
ABSTRACT:
A catalyst system comprising (i) a bulky ligand catalyst compound; and (ii) a novel borate activator is active for olefin polymerization. The novel borate contains at least one chelating (divalent) ligand and contains at least one fluorine atom. Preferred borate activators are provided as anilinium or carbonium salts. Highly preferred borate salts contain two perfluorinated alkoxy chelating ligands. The catalyst system may be used to produce polyethylene for “end use” applications such as polyethylene film and molded polyethylene goods.
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Gao Xiaoliang
Jaber Isam
Johnson Kenneth H.
Lu Caixia
Nova Chemicals (International) S.A.
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