Nelson S Marans

US Patent:

41691750, Sep 25, 1979

Filed:

Oct 11, 1977

Appl. No.:

5/841247

Inventors:

Nelson S. Marans - Silver Spring MD
Alfred Gluecksmann - Silver Spring MD

Assignee:

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

International Classification:

C08G 1870

US Classification:

528 59

Abstract:

Disclosed herein are improved urethane prepolymers comprising the reaction product of a polyol with a monomeric isocyanate. The amount of residual unreacted monomeric isocyanate in said prepolymer is less than about 0. 7% by weight of said prepolymer.

US Patent:

46147624, Sep 30, 1986

Filed:

Jun 15, 1984

Appl. No.:

6/620977

Inventors:

Nelson S. Marans - Silver Spring MD
Stephen M. Pulford - Baltimore MD

Assignee:

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

International Classification:

C08F 800

US Classification:

525 61

Abstract:

The present invention is directed to a high molecular weight, water soluble polymer product of polyethyleneimine, said product is formed by reacting a linear polyethylenimine with formaldehyde and a polyvinyl alcohol. The resultant product is useful as an improved drainage and retention aid in papermaking processes.

US Patent:

39561577, May 11, 1976

Filed:

Jul 19, 1974

Appl. No.:

5/490120

Inventors:

Nelson S. Marans - Silver Spring MD

Assignee:

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

International Classification:

C11D 3395

US Classification:

252 95

Abstract:

An aqueous solution useful as a detergent and bleach is prepared by dissolving an admixture of sodium perborate, sodium. alpha. -glucoheptonate, and sodium. beta. -glucoheptonate in water; the water can be evaporated to form a free flowing particulate solid useful as a detergent and bleach.

US Patent:

40082946, Feb 15, 1977

Filed:

Jul 22, 1975

Appl. No.:

5/598099

Inventors:

Nelson S. Marans - Silver Spring MD
Thomas E. Ferington - Columbia MD
Philip Messina - Colonia NJ

Assignee:

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

International Classification:

C08K 702

US Classification:

260862

Abstract:

Ultra fine polypropylene fibers having a length of 1-100 microns and a diameter of 0. 05-2 microns are admixed with a polyester resin composition comprising a polyester resin of a polyhydric alcohol and an unsaturated polycarboxylic acid admixed with a solvent such as styrene in an amount effective to cause the resulting thickened composition to have a thixotropic index of 1. 5-8. The resulting thickened composition is useful for building or repairing fiber glass-polyester boats. The incorporation of such ultrafine polypropylene fibers in an epoxy resin composition also thickens the epoxy resin composition and causes it to have a thixotropic index of about 1. 5-8.

US Patent:

41654110, Aug 21, 1979

Filed:

Sep 20, 1977

Appl. No.:

5/834927

Inventors:

Nelson S. Marans - Silver Spring MD
Clifton L. Kehr - Silver Spring MD
Robert M. Murch - Ashton MD

Assignee:

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

International Classification:

C08K 552
C08K 553
C08K 551

US Classification:

521107

Abstract:

The invention disclosed relates to a new polyurethane composition having improved flame retardance and to a method for preparing same. The present composition includes a hydrophilic polyurethane having alumina hydrate and a phosphorus containing compound disposed therein.

US Patent:

41101430, Aug 29, 1978

Filed:

Oct 21, 1974

Appl. No.:

5/516224

Inventors:

Joseph A. Cogliano - Baltimore MD
Nelson S. Marans - Silver Spring MD

Assignee:

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

International Classification:

H01M 216

US Classification:

156167

Abstract:

This invention is directed to a process for forming a wettable battery separator comprising a non-woven mat of polyolefin fiber by forming a non-woven mat of polyolefin fiber having a thickness in the range 10 to 40 mils and pore sizes less than 40 microns, contacting the mat with an aqueous solution of a water soluble peroxy compound, e. g. hydrogen peroxide or potassium persulfate at a temperature below 70. degree. C. , rinsing the mat in water and thereafter immersing the thus treated mat in an aqueous solution of a hydrophilic vinyl monomer such as acrylic, methacrylic, vinyl sulfonic acid, said solution containing a redox catalyst, e. g. an ion of a transition metal, e. g. ferrous, cerous, cobaltous, or an organic amine, thereby causing a graft polymerization of said hydrophilic vinyl monomer on said polyolefin mat to give a wettable polyolefin battery separator.

US Patent:

42018463, May 6, 1980

Filed:

Nov 24, 1978

Appl. No.:

5/963600

Inventors:

Clifton L. Kehr - Silver Spring MD
Louis L. Wood - Rockville MD
Nelson S. Marans - Silver Spring MD
Glenn E. Fulmer - Clarksville MD

Assignee:

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

International Classification:

C08G 1814

US Classification:

521137

Abstract:

The invention disclosed relates to hydrophilic polyurethane foam which exhibits improved tensile and tear properties and reduced shrinkage upon drying as a result of incorporation of substantially hydrophilic reinforcing fibers formed from homopolymers and copolymers of polyvinyl alcohol. The reinforced foams also exhibit reduced swelling upon contact with water.

US Patent:

41328396, Jan 2, 1979

Filed:

Sep 16, 1977

Appl. No.:

5/833843

Inventors:

Nelson S. Marans - Silver Spring MD
Alan R. Pollack - Baltimore MD

Assignee:

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

International Classification:

C08G 1842
C08G 1814

US Classification:

521159

Abstract:

Disclosed herein are novel prepolymers which, when foamed provide hydrophilic polyurethane foams which are biodegradable.