Jeffrey M Greco

US Patent:

20170088639, Mar 30, 2017

Filed:

Sep 24, 2015

Appl. No.:

14/863575

Inventors:

- The Woodlands TX, US
Qing Yang - Bartlesville OK, US
Lloyd W. Guatney - Bartlesville OK, US
Jeffrey F. Greco - Tulsa OK, US

International Classification:

C08F 4/6592
C08F 4/645

Abstract:

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.

US Patent:

20150259444, Sep 17, 2015

Filed:

Mar 12, 2014

Appl. No.:

14/205461

Inventors:

- The Woodlands TX, US
Jeffrey F. Greco - Bartlesville OK, US
Yongwoo Inn - Bartlesville OK, US
Qing Yang - Bartlesville OK, US

Assignee:

Chevron Phillips Chemical Company LP - The Woodlands TX

International Classification:

C08F 10/14
C08F 10/08

Abstract:

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.

US Patent:

20150141597, May 21, 2015

Filed:

Nov 12, 2014

Appl. No.:

14/538830

Inventors:

- The Woodlands TX, US
Jeffrey F. Greco - Bartlesville OK, US

International Classification:

C08F 210/16

US Classification:

526133, 556 7, 5263485, 502152, 502117

Abstract:

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.

US Patent:

20150141599, May 21, 2015

Filed:

Nov 5, 2014

Appl. No.:

14/533161

Inventors:

- The Woodlands TX, US
Jeffrey F. Greco - Bartlesville OK, US

International Classification:

C08F 10/02

US Classification:

526134, 556 7, 502152, 502117

Abstract:

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.