Fu U 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:

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:

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:

49063839, Mar 6, 1990

Filed:

Jul 5, 1988

Appl. No.:

7/215100

Inventors:

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

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 514

US Classification:

210697

Abstract:

This invention relates to novel polymeric compositions which are useful for water treatment. These novel compositions are comprised of polymers of. alpha. ,. beta. ethylenically unsaturated monomer(s), preferably containing carboxylic acid or carboxylic amide functionalities, and amine-containing allyl ether monomers.

US Patent:

47326980, Mar 22, 1988

Filed:

Feb 10, 1987

Appl. No.:

7/012926

Inventors:

Fu Chen - Newtown PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 514

US Classification:

252181

Abstract:

A water soluble polymer composition is disclosed. The polymer has repeat units characterized by the structural formulae: ##STR1## wherein R. sub. 1 is H or lower alkyl (C. sub. 1 -C. sub. 3)b; R. sub. 2 is OH, OM, or NH. sub. 2 ; M is a water soluble cation; R. sub. 3 is a hydroxy substituted alkyl or alkylene radical having from 1 to about 6 carbon atoms or a non-substituted alkyl or alkylene radical having from 1 to 6 carbon atoms; X is an anionic radical; Z is H or hydrogens or a water soluble cation or cations which together counterbalance the valence of X, and D is 0 or 1. The copolymer is effective in inhibiting the precipitation of certain scale forming salts, and also acts to inhibit corrosion of metal parts in contact with water systems.

US Patent:

58464360, Dec 8, 1998

Filed:

Feb 20, 1997

Appl. No.:

8/801401

Inventors:

Jen-Chi Chen - Morrisville PA
Fu Chen - Newtown PA
Gerald C. Walterick - Levittown PA
Stephen R. Vasconcellos - Doylestown PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

B01D 2101

US Classification:

210730

Abstract:

Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The polymers are aldehyde-free and comprise copolymers of tannin and a cationic monomer. Another embodiment comprises aldehyde-free polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.

US Patent:

47598514, Jul 26, 1988

Filed:

Apr 13, 1987

Appl. No.:

7/037484

Inventors:

Fu Chen - Newtown PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 514

US Classification:

210697

Abstract:

A water soluble polymer composition is disclosed. The polymer has repeat units characterized by the structural formulae: ##STR1## wherein R. sub. 1 is H or lower alkyl (C. sub. 1 -C. sub. 3); R. sub. 2 is OH, OM or NH. sub. 2 ; M is a water soluble cation; R. sub. 3 is a hydroxy substituted alkyl or alkylene radical having from 1 to about 5 carbon atoms or a non-substituted alkyl or alkylene radical having from 1 to 6 carbon atoms; X is an anionic radical; Z is H or hydrogens or a water soluble cation or cations which together counterbalance the valence of X, and a is 0 or 1. The copolymer is effective in inhibiting the precipitation of certain scale forming salts, and also acts to inhibit corrosion of metal parts in contact with water systems.

US Patent:

47012625, Oct 20, 1987

Filed:

Oct 21, 1986

Appl. No.:

6/921670

Inventors:

Fu Chen - Newtown PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 514

US Classification:

210699

Abstract:

A water soluble polymer composition is disclosed. The polymer has repeat units characterized by the structural formulae: ##STR1## wherein R. sub. 1 is H or lower alkyl (C. sub. 1 -C. sub. 3); R. sub. 2 is OH, OM, or NH. sub. 2 ; M is a water soluble cation; R. sub. 3 is a hydroxy substituted alkyl or alkylene radical having from 1 to about 6 carbon atoms or a non-substituted alkyl or alkylene radical having from 1 to 6 carbon atoms; X is an anionic radical; Z is H or hydrogens or a water soluble cation or cations which together counterbalance the valence of X, and a is 0 or 1. The copolymer is effetive in inhibiting the precipitation of certain scale forming salts, and also acts to inhibit corrosion of metal parts in contact with water systems.