Balwant N Singh

US Patent:

6630599, Oct 7, 2003

Filed:

Dec 30, 1998

Appl. No.:

09/223512

Inventors:

Balwant Singh - Stamford CT
Laurence Wu-Kwang Chang - Orange CT

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C07C26100

US Classification:

560 25, 5483211, 548537

Abstract:

A process for preparing blocked derivatives of m- or p- isopropenyl-,-dimethylbenzyl isocyanates, comprising reacting a meta- or a para-isopropenyl-,-dimethylbenzyl carbamate ester with hydroxy functional blocking group, such as hydroxyethylene-ethyleneurea, hydroxyethylenepropylene urea, dialkylaminoethanol and dialkylamino propanol.

US Patent:

41397070, Feb 13, 1979

Filed:

Mar 8, 1978

Appl. No.:

5/884674

Inventors:

Sivaraman Raghu - Norwalk CT
Arthur K. Hoffmann - New Canaan CT
Balwant Singh - Stamford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C07D23370
C07D23390

US Classification:

548320

Abstract:

A process for the manufacture of 1-(2-alkoxyethyl)-4-phenyl-4-imidazolin-2-ones, 1-(2-alkoxyethyl)-4-phenyl-2-imidazolidones, 1-(2-alkoxyethyl)-4-phenyl-imidazolidine-2-thiones, certain of the corresponding 1-(2-hydroxyethyl) derivatives and their 3-acylated derivatives, and certain related compounds which are all useful as intermediates in a new process for the manufacture of tetramisole, dl-2,3,5,6-tetrahydro-6-phenylimidazo-[2,1-b]thiazole, and its derivatives. The compound tetramisole is useful as an anthelmintic.

US Patent:

53149505, May 24, 1994

Filed:

Jan 22, 1993

Appl. No.:

8/007225

Inventors:

Balwant Singh - Stamford CT
Robert J. Tynik - Stamford CT

Assignee:

Cytec Technology Corp. - Wilmington DE

International Classification:

C08L 3500
C08L 3506
C08F22240
C08F12240

US Classification:

525 73

Abstract:

Novel resin compositions are provided which possess excellent heat resistance and thermal color stability, alone, or in admixture with bulk resins. The claimed resin compositions comprise homo- and/or copolymers of N-(2,3-dimethylphenyl) maleimide, alone, or in further combination with resins composed of copolymer components, such as vinyl copolymers and rubber-grafted vinyl copolymer resins. The resin compositions have improved heat resistance and produce molded articles with desirably light colors. Also provided is an improved process to make maleimide monomers by using selected polar solvents whereby the amount of uncyclizable trans-amic acid is held at tolerable levels and the desired maleimide is obtained in high yields, free from by-products.

US Patent:

50895613, Feb 18, 1992

Filed:

Mar 11, 1991

Appl. No.:

7/667740

Inventors:

Peter S. Forgione - Stamford CT
Balwant Singh - Stamford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C08F 830

US Classification:

525127

Abstract:

Novel alkylcarbamylmethyl aminotriazines self-cure and also function as crosslinkers for compounds containing active hydrogen groups. When the active hydrogen-containing compounds are hydroxylated polymers, coatings are provided with exceptional resistance to detergent and salt-spray exposure and improved abrasion resistance. The novel aminotriazines also can be combined with fillers as binders which when cured provide shaped articles of manufacture, such as insulation and foundry core molds.

US Patent:

51087987, Apr 28, 1992

Filed:

Jun 8, 1989

Appl. No.:

7/362908

Inventors:

Gerald J. Guerro - Trumbull CT
William A. Henderson - Stamford CT
Balwant Singh - Stamford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

B05D 302

US Classification:

4273898

Abstract:

The binder composition of this invention contains a beta-hydroxy urethane functional material and a polycarboxylic acid. Coated glass fibers are prepared by contacting said fibers with the binder composition of the invention and thereafter curing the composition. This invention is also an improved method of treating glass fibers by contacting them with the improved binder composition of the invention.

US Patent:

43106722, Jan 12, 1982

Filed:

Mar 17, 1980

Appl. No.:

6/131293

Inventors:

Sivaraman Raghu - Norwalk CT
Arthur K. Hoffmann - New Canaan CT
Balwant Singh - Stamford CT

Assignee:

American Cyanamid Co. - Stamford CT

International Classification:

C07D27760

US Classification:

548155

Abstract:

A process for the manufacture of 1-(2-alkoxyethyl)-4-phenyl-4-imidazolin-2-ones, 1-(2-alkoxyethyl)-4-phenyl-2-imidazolidones, 1-(2-alkoxyethyl)-4-phenyl-imidazolidine-2-thiones, certain of the corresponding 1-(2-hydroxyethyl) derivatives and their 3-acylated derivatives, and certain related compounds which are all useful as intermediates in a new process for the manufacture of tetramisole, di-2,3,5,6-tetrahydro-6-phenylimidazo-[2,1-b]thiazole, and its derivatives. The compound tetramisole is useful as an anthelmintic.

US Patent:

39446182, Mar 16, 1976

Filed:

Aug 1, 1974

Appl. No.:

5/493802

Inventors:

Balwant Singh - Stamford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C07C 8900
C07C 8904
C07C 9104

US Classification:

260584R

Abstract:

D-2-Amino-1-butanol, for the synthesis of ethambutol hydrochloride, d,d'-2,2'-(ethylenediimino)di-1-butanol dihydrochloride, is produced in high purity and good yields by the reaction of butene-1, a nitrile, preferably an excess of acetonitrile, and chlorine to form N-[1-(chloromethyl)propyl]acetimidoyl chloride which is hydrolyzed to dl-2-amino-1-butanol, which can be isolated as the hydrochloride, or free base, or a mixture, resolved with L(+)-tartaric acid and the d-2-amino-1-butanol reacted with ethylene dichloride and then hydrochloric acid to form ethambutol hydrochloride. A minimum of by-products which are conveniently split out permits the economical synthesis of a pharmaceutical grade product.

US Patent:

50896172, Feb 18, 1992

Filed:

Nov 13, 1987

Appl. No.:

7/120570

Inventors:

Peter S. Forgione - Stamford CT
Balwant Singh - Stamford CT

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

C07D25118
C07D25170

US Classification:

544196

Abstract:

Novel beta-hydroxyalkylcarbamylmethyl aminotriazines function in self-condensation and as cross-linkers for amino resins and also compounds containing active hydrogen groups. The compositions cure to coatings with excellent properties, and they can be used as binders for fillers such as insulating glass and foundry sand.