Ram K Gupta

US Patent:

52888657, Feb 22, 1994

Filed:

Oct 30, 1992

Appl. No.:

7/968871

Inventors:

Ram B. Gupta - Bronx NY

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C07D25154
C07D41304

US Classification:

544200

Abstract:

This invention provides a process for preparing amide derivatives of acids by the reaction of haloaminotriazines and acid halides. This invention also provides a process for preparing isocyanates and isocyanate adducts from amide derivatives derived from haloaminotriazines and acid halides such as oxalyl chloride, phosgene and phosgene analogs. Melamine derived acid amides are prepared by reaction of trichloro and hexachloromelamines with chloroformates and acid chlorides. The by-product chlorine may be recycled in this process. Amides, carbamates, sulfonamides, phosphoramides, and related amide derivatives may be prepared by the novel processes of the invention.

US Patent:

56727038, Sep 30, 1997

Filed:

Mar 21, 1995

Appl. No.:

8/408323

Inventors:

Subban Ramesh - Parsippany NJ
Laurence Lyman Williams - Stamford CT
Ram Baboo Gupta - Bronx NY

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C07D25140

US Classification:

544194

Abstract:

New classes of 1,3,5-triazine compounds and compositions containing the same are disclosed, which compounds are of the general formula ##STR1## wherein each of Y, Z and optionally X are independently selected from a group of the formula (II), (III) and/or (IV) ##STR2## These compounds and compositions are particularly suitable for use as crosslinking agents in curable compositions such as coatings, particularly in combination with active hydrogen groups-containing materials. The 1,3,5-triazine compounds of the present invention do not release formaldehyde as a volatile by-product during cure, and certain of these compounds may be used in curable compositions which may be cured at relatively low temperature. Processes for preparing such compounds, compositions containing the same, as well as additional uses thereof, are also disclosed.

US Patent:

58521330, Dec 22, 1998

Filed:

Aug 29, 1996

Appl. No.:

8/705472

Inventors:

Ram Baboo Gupta - Bronx NY
Kuang Jong Wu - Easton CT

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C08F 832

US Classification:

525375

Abstract:

Curable compositions which include a 1,3,5-triazine carbamate crosslinker and a polyfunctional epoxy resin as well as their uses in coatings are disclosed. The compositions may additionally contain a co-crosslinker and/or a polyfunctional hydroxy group containing material. Reduction in the formaldehyde emission levels relative to aminoplast resin based coatings can be achieved without loss of the ultimate film properties.

US Patent:

55719155, Nov 5, 1996

Filed:

Mar 3, 1995

Appl. No.:

8/398256

Inventors:

Ram B. Gupta - Bronx NY

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C07D25148
C07D25154

US Classification:

544200

Abstract:

This invention provides a process for preparing amide derivatives of acids by the reaction of haloaminotriazines and acid halides. This invention also provides a process for preparing isocyanates and isocyanate adducts from amide derivatives derived from haloaminotriazines and acid halides such as oxalyl chloride, phosgene and phosgene analogs. Melamine derived acid amides are prepared by reaction of trichloro and hexachloromelamines with chloroformates and acid chlorides. The by-product chlorine may be recycled in this process. Amides, carbamates, sulfonamides, phosphoramides, and related amide derivatives may be prepared by the novel processes of the invention.

US Patent:

54059593, Apr 11, 1995

Filed:

Nov 10, 1993

Appl. No.:

8/150679

Inventors:

Ram B. Gupta - Bronx NY

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C07D25148
C07D25154

US Classification:

544195

Abstract:

This invention provides a process for preparing amide derivatives of acids by the reaction of haloaminotriazines and acid halides. This invention also provides a process for preparing isocyanates and isocyanate adducts from amide derivatives derived from haloaminotriazines and acid halides such as oxalyl chloride, phosgene and phosgene analogs. Melamine derived acid amides are prepared by reaction of trichloro and hexachloromelamines with chloroformates and acid chlorides. The by-product chlorine may be recycled in this process. Amides, carbamates, sulfonamides, phosphoramides, and related amide derivatives may be prepared by the novel processes of the invention.

US Patent:

57770409, Jul 7, 1998

Filed:

Jul 3, 1997

Appl. No.:

8/887746

Inventors:

Subban Ramesh - Parsippany NJ
Laurence Lyman Williams - Stamford CT
Ram Baboo Gupta - Bronx NY

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C08G 1880

US Classification:

5253299

Abstract:

Curable compositions containing new classes of 1,3,5-triazine compounds as crosslinkers are disclosed, which compounds are of the general formula ##STR1## wherein each of Y, Z and optionally X are independently selected from a group of the formula (II), (III) and/or (IV) ##STR2## and wherein A, D, Q, R. sup. 1, R. sup. 2, R. sup. 3, R. sup. 4, R. sup. 5, R. sup. 6, R. sup. 7 and R. sup. 8 are as defined herein.

US Patent:

57836426, Jul 21, 1998

Filed:

Jul 3, 1997

Appl. No.:

8/887311

Inventors:

Subban Ramesh - Parsippany NJ
Laurence Lyman Williams - Stamford CT
Ram Baboo Gupta - Bronx NY

Assignee:

Cytec Industries Inc. - Stamford CT

International Classification:

C08F 830

US Classification:

525348

Abstract:

Coating compositions containing new classes of 1,3,5-triazine compounds as crosslinkers are disclosed, which compounds are of the general formula ##STR1## wherein each of Y, Z, and optionally X are independently selected from a group of the formula (II), (III) and/or (IV) ##STR2## and wherein A, D, Q, R. sup. 1, R. sup. 2, R. sup. 3, R. sup. 4, R. sup. 5, R. sup. 6, R. sup. 7 and R. sup. 8 are as defined herein.

US Patent:

61536725, Nov 28, 2000

Filed:

Jan 7, 1993

Appl. No.:

8/001697

Inventors:

Ram B. Gupta - Bronx NY
Robert G. Lees - South Stamford CT

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C07D40314
C08G 7306
C08L 3314
C08L 6702

US Classification:

523414

Abstract:

A process for preparing a tris-lactam crosslinking agent, tris-pyrrolidonyl triazine, from N,N',N"-tris(4-chlorobutyryl)melamine by treatment of the chlorobutyryl derivative with a base such as sodium or potassium carbonate to effect intramolecular cyclization to the tris-lactam. A curable composition comprised of tris-pyrrolidonyl triazine as the crosslinking agent and a hydroxyfunctional or aminofunctional material as a resin. Thick films with no pinholes are prepared from the curable compositions using powder coating techniques.