Robert L Harper

US Patent:

47657960, Aug 23, 1988

Filed:

Jul 20, 1987

Appl. No.:

7/075169

Inventors:

Robert J. Harper - Metairie LA
John V. Beninate - New Orleans LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06M 900
D06P 500

US Classification:

81157

Abstract:

Cellulosic fabric is dyed by affixing a hydroxymethyl phosphonium-nitrogen based polymer to the fabric and thereafter dyeing it with a cotton dye having anionic groups, in an acidic or neutral environment. In addition, a new method of affixing the polymer to the fabric is provided comprising contacting the fabric with a solution of urea and a precondensate of urea and tetrakis hydroxymethyl phosphonium salt.

US Patent:

43625274, Dec 7, 1982

Filed:

Jan 4, 1982

Appl. No.:

6/337045

Inventors:

Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06M 1308

US Classification:

8194

Abstract:

A process for improving the radiation resistance of cellulosic fabrics is disclosed. Fabric is immersed first in a 23% caustic solution for 15 minutes and then in a 5% caustic solution for 15 minutes. The excess caustic is removed and the fabric padded to 105% wet-pickup using neutralized pentafluorobenzoic acid. The fabric is then cured at 130. degree. -140. degree. C. for 6-8 minutes.

US Patent:

47432667, May 10, 1988

Filed:

Sep 9, 1986

Appl. No.:

6/905208

Inventors:

Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06P 500
D06M 1334

US Classification:

8181

Abstract:

Process for producing smooth dry-cellulose containing fabrics with durable softness and dyeable properties are disclosed. Cellulose containing fabric is treated with a solution of crosslinking agent, acid catalyst and a longchain alkyl bishydroxyethyl quaternary amine salt additive. The resultant fabric is smooth-dry durably softened and can be dyed. Printdyeing is accomplished by selective application of the alkyl quaternary to a fabric padded with a crosslinking agent. This treatment is then followed by curing and dyeing. Differential dyeing is accomplished by first treating separate yarns with different solutions containing crosslinking agent with and without the alkyl quaternary, drying, knitting, curing and then dyeing the knitted fabric. Multicolored crossdyed cellulosic fabrics which are partly crosslinked are produced by crosslinking preselected areas of fabric with a grafted cationic group and leaving other areas untreated; immersing the fabric in an acidic anionic dyebath to dye the cationic areas and then immersing in a different colored alkaline, reactive dyestuff dyebath to dye the untreated areas.

US Patent:

42987474, Nov 3, 1981

Filed:

Aug 25, 1980

Appl. No.:

6/180544

Inventors:

John G. Frick - New Orleans LA
Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

C07D23340

US Classification:

548318

Abstract:

New compounds in the class of. alpha. ,. omega. -bis(4,5-dihydroxy-3-methyl-2-oxoimidazolidin-1-yl)alkanes have been prepared from the reaction of glyoxal and an alkylenebis(3-methylurea). These compounds are useful as formaldehyde-free finishing agents for textiles containing cellulose.

US Patent:

42368901, Dec 2, 1980

Filed:

Jun 7, 1978

Appl. No.:

5/913418

Inventors:

Eugene J. Blanchard - New Orleans LA
Gloria A. Gautreaux - Metairie LA
Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06P 116
D06P 158
D06P 360
D06P 384

US Classification:

8 25A

Abstract:

A pretreatment system composed of hexamethoxymethyl melamine, p-toluene sulfonic acid, 2-amino-2-methyl-1-propanol, triethylamine, butoxy triglycol, and carboxy vinyl polymeric thickener is disclosed, which through application to the fabric surface by a screen printing technique is highly effective in improving the affinity of cellulose-containing textiles for disperse dyestuffs. Fabrics with prints that are durable to washing are produced by simultaneously heat transfer printing and curing at about 190. degree. C. to 220. degree. C. for 20-30 seconds.

US Patent:

42808120, Jul 28, 1981

Filed:

Mar 21, 1980

Appl. No.:

6/132594

Inventors:

Darrell J. Donaldson - Metairie LA
Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06M 100

US Classification:

8116P

Abstract:

Smolder resistance is imparted to cotton and cotton-containing fabrics by applying a certain boron-nitrogen-phosphorus system to the fabric, employing conventional equipment. An inorganic boron compound is placed in solution with a phosphorus-containing compound, then a nitrogen-containing compound is added. The aqueous mixture is applied using conventional textile equipment, dried, and cured by standard methods.

US Patent:

41054032, Aug 8, 1978

Filed:

May 7, 1976

Appl. No.:

5/684127

Inventors:

Bethlehem K. Andrews - New Orleans LA
Robert J. Harper - Metairie LA
Norton A. Cashen - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

D06Q 102

US Classification:

8115

Abstract:

To the surface of knitted cotton fabrics is applied from 20 to 90% wet add-on of crosslinking agent in a novel geometric pattern by any of several techniques including kiss-roll padding, printing, or transferring the solution of crosslinking agent from impregnated material to the surface of the knitted fabric, followed by drying and curing the moist textile at elevated temperatures, and finally by washing the cured fabric to effect differential shrinkage of the fabric in the applied design, which novel shrinkage in the fabric is fixed through the life of the fabric and is stable through subsequent launderings.

US Patent:

46185127, Oct 21, 1986

Filed:

Jun 28, 1985

Appl. No.:

6/749905

Inventors:

Robert J. Harper - Metairie LA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

B05D 302
D06M 1334

US Classification:

427381

Abstract:

Synthetic-cellulosic blended fabric is padded with a solution of nitrogen rich N-methylol crosslinking agent, acid catalyst, antimony oxide and a halogen containing alcohol; dried at about 140. degree. -190. degree. F. and then cured at about 250. degree. -400. degree. F. for sufficient time to impart smooth-dry and flame retardant properties to the fabric. Aqueous polyethylene or silicone emulsion softeners can be added to the padding solution if desired. Dibromoneopentyl glycol makes an exemplary halogen containing alcohol. The process can be varied to first pad with antimony oxide, dry, and then repad with a solution of: nitrogen rich N-methylol crosslinking agent, acid catalyst, and a halogen containing alcohol, dry again and cure, at the above specified temperatures.