Thomas C Curran

US Patent:

58303154, Nov 3, 1998

Filed:

Jul 6, 1995

Appl. No.:

8/499098

Inventors:

David Brian Mitchell - Arlington Heights IL
Ralph Lemmel Minnis - Des Plaines IL
Thomas Peter Curran - Lake Zurich IL
Steven M. Deboo - Lake Zurich IL
John Arthur Kelly - Crystal Lake IL
Rashmi Patwardhan - Wheeling IL
Wun Ten Tai - Palo Hills IL

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

D21C 502
D21F 132
C02F 156

US Classification:

162500

Abstract:

There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e. g. acetic anhydride), etherification agent (e. g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e. g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e. g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7. The above modified tannins are useful for the coagulation and/or detackification of solid particles suspended in an aqueous system, such as paint particles suspended in the waste water of a paint spray booth operation.

US Patent:

59772875, Nov 2, 1999

Filed:

Jul 16, 1998

Appl. No.:

9/116500

Inventors:

David Brian Mitchell - Arlington Heights IL
Ralph Lemmel Minnis - Des Plaines IL
Thomas Peter Curran - Lake Zurich IL
Steven M Deboo - Lake Zurich IL
John Arthur Kelly - Crystal Lake IL
Rashmi Patwardhan - Wheeling IL
Wun Ten Tai - Palo Hills IL

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C08G 804

US Classification:

528129

Abstract:

There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e. g. acetic anhydride), etherification agent (e. g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e. g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e. g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7. The chemically modified tannins are useful for the coagulation and/or detackification of solid particles suspended in the aqueous system, such as paint particles suspended in the waste water of a paint spray booth operation.

US Patent:

52981860, Mar 29, 1994

Filed:

Sep 11, 1992

Appl. No.:

7/944136

Inventors:

David B. Mitchell - Arlington Heights IL
Thomas P. Curran - Round Lake IL
Wun T. Tai - Palos Hills IL
Gary G. Engstrom - Kenosha WI

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

C02F 510

US Classification:

252180

Abstract:

A composition and method of treating paint spray booth water to detackify organic solvent based paint particles. The composition comprises a melamine polymer obtained from the reaction of melamine, aldehyde and an amine selected from the group consisting of dicyandiamide and glycine. These melamine polymers may be used in combination with a polyacrylamide, which combination exhibits surprising and unexpected effects when used to detackify organic solvent paint particles.

US Patent:

39661059, Jun 29, 1976

Filed:

Aug 10, 1973

Appl. No.:

5/387235

Inventors:

Thomas F. Curran - Hoffman Estates IL

Assignee:

Cary Metal Products, Inc. - Barrington IL

International Classification:

B65H 2526

US Classification:

226 21

Abstract:

A web aligning apparatus is disclosed wherein a web path correcting tilt frame is mounted for tilting movement between the laterally spaced side plates of the tilt frame support structure. The tilt frame includes a pair of laterally spaced frame members which extend generally longitudinally of the path of travel of the web through the apparatus and which rotatably support a pair of steering rollers therebetween. The axes of the steering rollers extend generally transversely to the path of travel of the web through the apparatus. A pair of elongated links respectively connect the tilt frame members with the support structure side plates and are arranged so that the instantaneous center of rotation of the tilt frame is located outside the perimeter of the tilt frame and shifts along an arcuate path that extends laterally of the path of travel of the web with tilting movements of the tilt frame.

US Patent:

52484408, Sep 28, 1993

Filed:

Jan 30, 1992

Appl. No.:

7/828257

Inventors:

David B. Mitchell - Arlington Heights IL
Thomas P. Curran - Round Lake IL

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

C02F 156

US Classification:

210712

Abstract:

The present invention relates to a novel method for coagulating waterborne paints in paint spray booth recirculating water. The coagulant aid comprises a polynucleate hydroxy silicate-sulphate compound (hereinafter PASS) having the following average composition of the general formula: Al(OH). sub. B (SO. sub. 4). sub. C (SiO. sub. X). sub. D (H. sub. 2 O). sub. E wherein B ranges from 0. 75 to 2. 0; C ranges from 0. 30 to 1. 12; D ranges from 0. 005 to 0. 1; X is greater than 2. 0 but less or equal to 4. 0 such that 3=B+2C+2D(X-2) E is 1. 5 to 4 when the product is in solid form; and E is larger than 4 when the product is in aqueous form, which may optionally be used together with alum or a mixture of alum and a polyamine. The coagulant aids of this invention may also be used advantageously with detackifying agents to simultaneously detackify and coagulate solvent based paint particles.

US Patent:

49043935, Feb 27, 1990

Filed:

May 27, 1988

Appl. No.:

7/199969

Inventors:

David B. Mitchell - Palatine IL
Thomas P. Curran - Lake Zurich IL

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

C02F 156

US Classification:

210712

Abstract:

A composition and method for detackifying paint spray booth water containing particles from paint spray is disclosed which uses a reaction product of an aldehyde with either a urea or an aminotriazine or both, and at least one of; (i) a hydrolyzed polyacrylamide; (ii) certain modified tannins in further combination with diallyldialkyl quaternary ammonium polymers or polymers derived by reacting certain dialkylamines with epihalohydrins.

US Patent:

58433376, Dec 1, 1998

Filed:

Aug 4, 1997

Appl. No.:

8/905427

Inventors:

David Brian Mitchell - Arlington Heights IL
Ralph Lemmel Minnis - Des Plaines IL
Thomas Peter Curran - Lake Zurich IL
Steven M Deboo - Lake Zurich IL
John Arthur Kelly - Crystal Lake IL
Rashmi Patwardhan - Wheeling IL
Wun Ten Tai - Palo Hills IL

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

B01D 1704
C02F 156

US Classification:

252340

Abstract:

There is provided a composition comprising tannin containing hydroxyl groups which has been (a) chemically modified by reaction of at least one of said hydroxyl groups with at least one member selected from the group consisting of an esterification agent (e. g. acetic anhydride), etherification agent (e. g. dichloromethane or quaternary organic amine such as N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride) to form the corresponding ester, or ether, through said hydroxyl group, and (b) derivatized. The chemically modified tannin is derivatized by reaction with aldehyhde (e. g. formaldehyde), or aldehyde and at least one member selected from the group consisting of ammonia and organic amine containing at least one primary or secondary nitrogen (e. g. cyclohexyl amine); said derivatized tannin being water soluble or dispersable at a pH below 7 and water insoluble at a pH above 7. The above modified tannins are useful for the coagulation and/or detackification of solid particles suspended in an aqueous system, such as paint particles suspended in the waste water of a paint spray booth operation.