Steven J Gray

6486274, Nov 26, 2002

Oct 13, 2000

09/687688

Steven D. Gray - League City TX
Tim J. Coffy - Houston TX

Fina Technology, Inc. - Houston TX

C08F 4614

526119, 526118, 5261242, 5261243, 5261249, 502104, 502110, 502111, 502115, 502126, 502129, 502133

A Ziegler-Natta type catalyst having an improved hydrogen response provides for narrowing of the MWD of resulting polyolefins polymerized using such catalyst, with such catalyst generally made by a) contacting a soluble magnesium dialkoxide compound of the general formula Mg(ORâ) with a halogenating agent capable of exchanging one halogen for one alkoxide to form a reaction product A, where Râ is a hydrocarbyl or substituted hydrocarbyl having from 1 to 20 carbon atoms; b) contacting reaction product A with a first halogenating/titanating agent to form reaction product B; and c) contacting reaction product B with a second halogenating/titanating agent to form a catalyst component; wherein in at least one of steps b) and c), the halogenating/titanating agent is a blend of Ti(OPr) and TiCl. Catalyst components, catalysts, catalyst systems, polyolefin polymers, and methods of forming each are disclosed.

6693058, Feb 17, 2004

Oct 13, 2000

09/687560

Steven D. Gray - Houston TX
Tim J. Coffy - Houston TX

Fina Technology, Inc. - Houston TX

B01J 3100

502103

A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, and an organoaluminum preactivating agent. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution and the fluff morphology of the resulting polyolefins.

6734134, May 11, 2004

Oct 13, 2000

09/687378

Steven D. Gray - League City TX
Tim J. Coffy - Houston TX

Fina Technology, Inc. - Houston TX

B01J 3100

502132, 502133, 502107, 502110, 502113, 502115, 502116, 502125, 502126, 502134

A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with two halogenating/titanating agents, the second stronger than the first, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution of the resulting polyolefins.

6790804, Sep 14, 2004

Jun 27, 2002

10/186262

Steven D. Gray - League City TX
Tim J. Coffy - Houston TX
Edwar S. Shamshoum - Gibsonia PA

Fina Technology, Inc. - Houston TX

B01J 3100

502103, 502104, 502115, 502172, 525 21

A process of forming a polyolefin catalyst component includes contacting a metal compound of the formula MR with a diketone to form a metal bis(diketonate) having the formula M(OCRCRâCRO) , wherein M is a Group IIA or Group VIIB metal, and wherein R and Râ are each hydrocarbyls or substituted hydrocarbyls having from 1 to 20 carbons atoms. Catalyst components, catalysts, polyolefin polymers, catalysts systems, and methods of preparing same are disclosed.

6846859, Jan 25, 2005

May 31, 2002

10/160462

Tim J. Coffy - Houston TX, US
Steven D. Gray - League City TX, US
Gerhard K. Guenther - Seabrook TX, US

Fina Technology, Inc. - Houston TX

C08L 552

524128, 524151, 524121, 524349, 524147, 524585

The present invention includes a polyolefin composition having reduced coloration with aging. The polyolefin composition comprises at least one polyolefin, an effective amount of a primary phenolic antioxidant to promote long term thermal stability of the polymer composition, and an effective amount of a phosphite processing stabilizer to promote thermal stability of the polymer composition during melt processing. The polymer composition further comprises an effective amount of a sacrificial phosphite antioxidant to reduce the yellowness index of the polymer composition. The sacrificial phosphite antioxidant and the phosphite processing stabilizer are not the same compound.

6846887, Jan 25, 2005

Feb 18, 2003

10/370365

Steven D. Gray - League City TX, US
Tim J. Coffy - Houston TX, US
Edwar S. Shamshoum - Gibsonia PA, US
Hong Chen - Atlanta GA, US

Fina Technology, Inc. - Houston TX

C08F 4654
C08F 4655

5261242, 526 75, 5261247, 5261231, 502115, 502132

A method of modifying a Ziegler-Natta type polyolefin catalyst comprises contacting the Ziegler-Natta catalyst with olefin monomer to form a prepolymerized catalyst. The prepolymerized catalyst can comprise a reduced number of catalyst particles having a size of 40 microns or less. The prepolymerized catalyst can be used in a polymerization process to produce polymer fluff particles with a reduced number of polymer fluff fines than the Ziegler-Natta type catalyst.

6864207, Mar 8, 2005

Sep 22, 2003

10/667546

David W. Knoeppel - League City TX, US
Tim J. Coffy - Houston TX, US
Henry Enriquez - Pearland TX, US
Steven D. Gray - Houston TX, US

Fina Technology, Inc. - Houston TX

B01J031/00
B01J037/00
C08F004/02
C08F004/60

502110, 502114, 502115, 502132, 502133, 502134

A process for making a polyolefin catalyst component, catalyst and polymer resin is disclosed. Controlling the viscosity of a catalyst synthesis solution with the addition of aluminum alkyl alters the precipitation of the catalyst component from a catalyst synthesis solution. The average particle size of the catalyst component increases with an increased concentration of aluminum alkyl in the synthesis solution. The catalyst component can be produced by a process comprising contacting a magnesium alkyl compound with an alcohol and an aluminum alkyl to form a magnesium dialkoxide. Catalyst components, catalysts, catalyst systems, polyolefin, products made therewith, and methods of forming each are disclosed. The reaction products can be washed with a hydrocarbon solvent to reduce titanium species [Ti] content to less than about 100 mmol/L.

6916895, Jul 12, 2005

Oct 16, 2003

10/687126

Steven D. Gray - Houston TX, US
Tim J. Coffy - Houston TX, US

Fina Technology, Inc. - Houston TX

C08F110/02

526352, 5261241, 5261231, 5261242, 5261243, 526158, 502103, 502115, 502116, 502134, 502132

A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution of the resulting polyolefins.