Fu Mei Chen

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:

56146027, Mar 25, 1997

Filed:

Jul 9, 1996

Appl. No.:

8/677180

Inventors:

Edward J. Connors - Conshohocken PA
Michelle L. Cotter - Feasterville PA
Fu Chen - Newtown PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C08F22602

US Classification:

5263073

Abstract:

A process for preparing a water-soluble polymer dispersion is herein provided which is characterized by polymerizing from about 10 to 50 mole percent of a monomer having a formula (II); from about 1 to 50 mole percent of N-alkylacrylamide, N,N-dialkylacrylamide or mixtures thereof; having a formula (III) from about 1 to 70 mole percent acrylamide; and optionally up to about 4 mole percent of a monomer having a formula (I) having a benzyl functionality. The polymerization is carried out in the presence of an aqueous solution of a polyvalent anionic salt which contains (1) a water soluble cationic polymer which is insoluble in the aqueous salt solution and (2) a water soluble cationic polymer which is soluble in the aqueous salt solution.

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:

52923797, Mar 8, 1994

Filed:

Jun 19, 1992

Appl. No.:

7/901340

Inventors:

David W. Reichgott - Richboro PA
Fu Chen - Newtown PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23C 2206

US Classification:

148251

Abstract:

Methods of forming a dried in place conversion coating on metal surfaces such as aluminum and aluminum alloys. The methods comprise contacting the metal with an aqueous solution of a water soluble maleic or acrylic acid/allyl ether copolymer alone or with an acid.

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:

51823314, Jan 26, 1993

Filed:

Feb 26, 1991

Appl. No.:

7/661580

Inventors:

Wen P. Liao - Warminster PA
Fu Chen - Newtown PA
Stephen R. Vasconcellos - Doylestown PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C08F29300
C02F 1112

US Classification:

525294

Abstract:

A composition and method of use thereof for the treatment of wastewater comprising a block copolymer having the formula: ##STR1## wherein E is a polymeric segment obtained from the polymerization of hydrophobic monomers, x when present is a nonionic monomer, y is a cationic monomer, R. sub. 1 and R. sub. 2 are the same or different and are H or a lower alkyl group from C. sub. 1 to C. sub. 3 and F is a salt of an ammonium cation.