Fu Yen Chen

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:

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:

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.