Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-10-31
2006-10-31
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...
C526S114000, C526S160000, C526S165000, C526S124900, C526S348000, C526S352000, C526S943000, C502S113000, C502S114000, C502S115000, C502S104000
Reexamination Certificate
active
07129302
ABSTRACT:
Bimetallic catalyst for producing polyethylene resins with a bimodal molecular weight distribution, its preparation and use. The catalyst is obtainable by a process which includes contacting a support material with an organomagnesium component and carbonyl-containing component. The support material so treated is contacted with a non-metallocene transition metal component to obtain a catalyst intermediate, the latter being contacted with an aluminoxane component and a metallocene component, This catalyst may be further activated with, e.g., alkylaluminum cocatalyst, and contacted, under polymerization conditions, with ethylene and optionally one or more comonomers, to produce ethylene homo- or copolymers with a bimodal molecular weight distribution and improved resin swell properties in a single reactor. These ethylene polymers are particularly suitable for blow molding applications.
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Barry David Bruce
Diamond Gary M.
Fruitwala Hitesh A.
Mink Robert Ivan
Nowlin Thomas Edward
Arechederra Leandro
Faulkner Kevin M.
Lu Caixia
Univation Technologies LLC
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