Chevron Phillips Chemical Company LP

Jeffrey F Greco

Max P McDaniel

Qing R Yang

Errun Ding

Mark L Hlavinka

Yongwoo Inn

Vivek Rohatgi

Lloyd W Guatney

Alfred E Brown, Jr

Qing Yang

Youlu Yu

Tony R Crain

Gary L Glass

Jim B Askew

Vivek Rohati

Vivek Rohatghi

Catalyst systems containing a titanium alkoxymagnesium halide supported catalyst component can be used for the polymerization of olefins. The catalyst can be prepared from a microcrystalline solid alkoxymagnesium halide support having a lattice spacing in the 5 nm to 15 nm range.

Ziegler-Natta catalysts prepared from solid alkoxymagnesium halide supports

Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cmand a melt index greater than 50 g/10 min.

Boron-Bridged metallocene catalyst systems and polymers produced therefrom

Disclosed herein are catalyst compositions containing boron bridged, bis-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a density less than 0.92 g/cmand a melt index greater than 25 g/10 min.

Boron-Bridged bis-indenyl metallocene catalyst systems and polymers produced therefrom

Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.

Heterogeneous Ziegler-Natta catalysts with fluorided silica-coated alumina

Boron-bridged metallocene catalyst systems and polymers produced therefrom

Catalyst systems having both a metallocene catalyst component and a Ziegler-type catalyst component are disclosed. Such catalyst systems can contain a metallocene compound, a co-catalyst, and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.

Ziegler-natta&#x2014;metallocene dual catalyst systems with activator-supports

Boron-bridged bis-indenyl metallocene catalyst systems and polymers produced therefrom

Disclosed herein are ethylene-based polymers having a higher molecular weight component and a lower molecular weight component, and characterized by a density greater than 0.945 g/cm, a melt index less than 1.5 g/10 min, and a ratio of high load melt index to melt index ranging from 40 to 175. These polymers have the processability of chromium-based resins, but with improved stiffness and stress crack resistance, and can be used in blow molding and other end-use applications.

Polymers with improved ESCR for blow molding applications

Disclosed herein are catalyst compositions containing boron-bridged, cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene copolymers produced using these catalyst compositions can be characterized by a combination of a flat or a conventional comonomer distribution and low levels of long chain branching.

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Tulsa, OK, United States of America

Jeffrey F Greco