Shaotian T Wang

6403736, Jun 11, 2002

Jun 14, 2000

09/593878

Shaotian Wang - Mason OH

Equistar Chemicals, LP - Houston TX

C08F 444

526160, 526134, 526943, 526941, 526348, 502104, 502114

An ethylene polymerization process is disclosed. The process uses a single-site catalyst that contains a boraaryl ligand. The catalyst is premixed with alkyl aluminum to reduce the induction time of the catalyst. In addition, premixing the catalyst with triethyl aluminum significantly enhances the bulk density of polyethylene.

6476165, Nov 5, 2002

Mar 8, 2000

09/521166

Shaotian Wang - Mason OH

Equistar Chemicals, LP - Houston TX

C08F 402

526129, 526 74, 5261249, 526134, 526141, 526147, 526161, 526172, 526156, 526904

An olefin polymerization process is described. The process comprises polymerizing an olefin in the presence of a support, a single-site catalyst, an optional activator, and a fatty amine. The support is chemically treated with an organoboron compound. The single-site catalyst contains a polymerization-stable, heteroatomic ligand. The fatty amine is added directly to the reactor. The combination of pre-treating the support with an organoboron compound and the addition of fatty amine to the process unexpectedly increases catalyst activity.

6559251, May 6, 2003

Aug 2, 2002

10/211085

Shaotian Wang - Mason OH
Clifford C. Lee - Pearland TX
Mark P. Mack - West Chester OH
Gregory G. Hlatky - Morrow OH
Sandor Nagy - Naperville IL
Barbara M. Tsuie - West Chester OH

Equistar Chemicals, LP - Houston TX

C08F 464

526127, 526129, 526161, 526172, 526943, 5263482, 5263485, 5263486, 502103, 502117, 502120, 502155

A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an -olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having âopen architecture. â The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw 100K) and very low densities (0. 910 g/cm ). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described.

6583240, Jun 24, 2003

May 23, 2001

09/863536

Shaotian Wang - Mason OH

Equistar Chemicals, LP - Houston TX

C08F 444

526153, 526131, 526151, 526134, 526148, 526160, 526170, 526348, 5263482, 5263485, 5263486, 526351, 526352

An ethylene polymerization process is disclosed. The polyethylene has a long-chain-branching index (LCBI) of 1 or greaster. The process uses a single-site catalyst that contains a boraaryl ligand. The catalyst is alkylated with triisobutyl aluminum.

6583242, Jun 24, 2003

Aug 2, 2001

09/921354

Shaotian Wang - Mason OH
Norma J. Maraschin - Cincinnati OH
Debra L. Beran - Pearland TX
William J. Sartain - West Chester OH

Equistar Chemicals, LP - Houston TX

C08F 406

526161, 526172, 526134, 526904, 526943, 526352, 526129, 502104

A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support having mean particle size less than about 30 microns chemically treated with alumoxane; (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is -bonded to M; and (c) an activator. Chemical treatment with alumoxane and support mean particle size less than 30 microns are key to making supported indenoindolyl containing catalysts having high activity.

6630547, Oct 7, 2003

Jun 11, 2002

10/166934

Michael W. Lynch - West Chester OH
Shaotian Wang - Mason OH
William J. Sartain - West Chester OH

Equistar Chemicals, LP - Houston TX

C08F 442

526128, 526160, 526943, 526161, 502155, 502152

A process for polymerizing an olefin is disclosed. The olefin is polymerized with a catalyst precursor in the presence of an activator and an organosilane modifier. Use of the organosilane increases polyolefin molecular weight. The process is easy to practice and affords polyolefins with conventional polymerization methods such as slurry polymerizations or gas-phase polymerizations.

6664349, Dec 16, 2003

Mar 29, 2001

09/820404

Shaotian Wang - Mason OH

Equistar Chemicals, LP - Houston TX

C08F 444

526134, 526131, 526133, 526126, 526160, 526170, 526904, 526943, 526351, 526352, 5263485, 5263482

An ethylene polymerization process is disclosed. The process uses a single-site catalyst that contains a boraaryl ligand. It comprises supporting the catalyst, forming a slurry of the supported catalyst in an organic solvent, mixing the catalyst slurry with trialkyl aluminum compound, and polymerizing ethylene in the presence of the trialkyl aluminum-treated catalyst slurry. The process gives polyethylene having a controlled long-chain-branch index.

6693155, Feb 17, 2004

Mar 5, 2003

10/379752

Craig C. Meverden - Mason OH
Gregory G. Hlatky - Morrow OH
Shaotian Wang - Mason OH

Equistar Chemicals, LP - Houston TX

C08F 464

526160, 526126, 526127, 526129, 526134, 526161, 526170, 5263482, 5263485, 526351, 526943

A process for polymerizing propylene is disclosed. The propylene is polymerized with a catalyst system which comprises an activator and a [1,2-b]indenoindolyl Group 4-6 transition metal complex having open architecture. The process has high catalyst activity and gives high molecular weight elastomeric polypropylene.