Fu Dr Chen

US Patent:

6417268, Jul 9, 2002

Filed:

Dec 6, 1999

Appl. No.:

09/455024

Inventors:

Huashi T. Zhang - South Pasadena CA
Baraka A. Kawawa - Bensalem PA
Fu Chen - Newtown PA

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C08L 3100

US Classification:

524833, 524 55, 524831, 524832

Abstract:

Method for producing an hydrophobically associative polymer is provided which is characterized by forming a monomer solution comprising a surfactant, at least one hydrophobic ethylenically unsaturated monomer, at least one hydrophilic monomer selected from nonionic ethylenically monomers, cationic ethylenically unsaturated monomers, anionic ethylenically unsaturated monomers or mixtures thereof, and water; forming a salt solution comprising a multivalent salt and water; mixing the monomer solution and salt solution to form a mixed solution; and charging the mixed solution with an initiator, thereby polymerizing the monomers to form the hydrophobically associative polymer in a dispersion. Aqueous dispersion containing the hydrophobically associative polymer formed by the method. The aqueous dispersion containing the hydrophobically associative polymer may be used in a paint formulation, in a mobility control fluid useful in enhanced oil recovery, in a secondary or tertiary oil recovery system, in an enhanced oil recovery method, in a cementious composition, in an oil well drilling mud formulation, in a fracturing fluid formulation, in a wastewater treatment system, or in a dewatering sludge system.

US Patent:

6444747, Sep 3, 2002

Filed:

Mar 15, 2001

Appl. No.:

09/808679

Inventors:

Fu Chen - West Chester PA
Natalie A. Kolson - West Chester PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C08L 4100

US Classification:

524807, 524817, 524832, 526287, 52631841, 526320

Abstract:

A water soluble or water dispersible polymer composition is disclosed. The polymer has the repeat units characterized by the formula I: Wherein E is the repeat unit remaining after polymerization of an ethylenically unsaturated compound; preferably, a carboxylic acid, sulfonic acid, phosphonic acid, or amide form thereof or mixtures thereof. R is H or lower (C -C ) alkyl. G is âCH â or âCHCH â; R is CH âCH âO or CH âCHCH âO where n ranges from about 1 to 100, preferably about 1 to 20. X is an anionic radical selected from the group consisting of SO , PO , or COO; Z is H or hydrogens or any water soluble cationic moiety which counterbalances the valence of the anionic radical X, including but not limited to Na, K, Ca, or NH. F, when present, is a repeat unit having the structure of formula II: wherein X and Z are the same as in Formula I. R is H or lower (C -C ) alkyl.

US Patent:

6465587, Oct 15, 2002

Filed:

Dec 8, 2000

Appl. No.:

09/732537

Inventors:

Keith A. Bair - Landenberg PA
Fu Chen - West Chester PA
Mohand Melbouci - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C08F22802

US Classification:

526240, 526274, 526287

Abstract:

The present invention relates to compositions and use of water-soluble or water-dispersible copolymers for oil field applications. Specifically, the present invention relates to polymers containing allyloxy linkage and its functional dervatives for use in oil field applications as fluid additives for drilling and cementing processes.

US Patent:

6590050, Jul 8, 2003

Filed:

Aug 20, 2002

Appl. No.:

10/224525

Inventors:

Keith A. Bair - Landenberg PA
Fu Chen - West Chester PA
Mohand Melbouci - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C08F22802

US Classification:

526240, 526271, 526273, 526274, 526277, 526287, 526288

Abstract:

The present invention relates to compositions and use of water-soluble or water-dispersible copolymers for oil field applications. Specifically, the present invention relates to polymers containing allyloxy linkage andits functional dervatives for use in oil field applications as fluid additives for drilling and cementing processes.

US Patent:

6641754, Nov 4, 2003

Filed:

Jun 11, 2001

Appl. No.:

09/878646

Inventors:

Kristin E. Buentello - Newtown PA
Stephen M. Kessler - Plymouth Township PA
Roger C. May - Warminster PA
Julie A. Kaechelin - Feasterville PA
Fu Chen - West Chester PA
Natalie A. Kolson - West Chester PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C08F 510

US Classification:

252180, 252181, 252175, 524807, 526287

Abstract:

A method of inhibiting the formation and deposition of scale forming moieties in aqueous systems by adding water-soluble or water-dispersible polymers is disclosed. The method comprises adding to an aqueous system a polymer having repeat units characterized by the Formula I: Wherein E is the repeat unit remaining after polymerization of an ethylenically unsaturated compound; preferably, a carboxylic acid, sulfonic acid, phosphonic acid, or amide form thereof or mixtures thereof. R is H or lower (C -C )alkyl. G is âCH â or âCHCH â; R is CH âCH âO or CH âCHCH âO where n ranges from about 1 to 100, preferably about 1 to 20. X is an anionic radical selected from the group consisting of SO , PO , or COO; Z is H or hydrogens or any water soluble cationic moiety which counterbalances the valence of the anionic radical X, including but not limited to Na, K, Ca, or NH. F, when present, is a repeat unit having the structure of Formula II: wherein X and Z are the same as in Formula I. R is H or lower (C -C )alkyl.

US Patent:

20030144384, Jul 31, 2003

Filed:

Oct 9, 2001

Appl. No.:

09/976658

Inventors:

Fu Chen - West Chester PA, US
Sung Chu - Hockessin DE, US
Natalie Kolson - Wester Chester PA, US

International Classification:

C08L001/00

US Classification:

524/002000

Abstract:

A building material is composed of a co- or ter-polymer of (i) a material selected from carboxylic acid, sulfonic acid, phosphonic acid, a amide form thereof or mixtures thereof and (ii) at least one polyethylene glycol monoallyl ether sulfate and a binding material of cement or gypsum. This building material can be used throughout the construction industry in many applications because the superplasticizer provides improved fluidity and yet is economical and efficient.

US Patent:

48636142, Sep 5, 1989

Filed:

Feb 21, 1989

Appl. No.:

7/313579

Inventors:

Fu Chen - Newtown PA
William S. Carey - Ridley Park PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 514

US Classification:

210699

Abstract:

New composition of polymers and methods of use are disclosed. The polymers are water soluble and are composed of repeat units formed from an. alpha. ,. beta. ethylenically unsaturated compound, and repeat units formed from allyl alkylene phosphonates.

US Patent:

52699420, Dec 14, 1993

Filed:

Jan 4, 1993

Appl. No.:

8/000424

Inventors:

John C. Harrington - Jacksonville FL
Jen-Chi Chen - Morrisville PA
Fu Chen - Newtown PA

Assignee:

Betz Laboratories - Trevose PA

International Classification:

C02F 156

US Classification:

210727

Abstract:

The use of quaternized polyvinylamine for use in clarification of water in a deinking loop of a paper, such as newspaper, recycling operation.