Charles D Irwin

US Patent:

50552171, Oct 8, 1991

Filed:

Nov 20, 1990

Appl. No.:

7/543640

Inventors:

Rigoberto F. Garcia - Nutley NJ
Elizabeth M. Coppinger - Rutherford NJ
Charles F. Irwin - Randolph NJ
Angela M. Sangirardi - Saddle Brook NJ

Assignee:

Lever Brothers Company, Division of Conopco, Inc. - New York NY

International Classification:

C11D 3395
C11D 360

US Classification:

252 94

Abstract:

A particulate detergent composition additive is disclosed wherein each particle is an intimately blended mixture of a bleach precursor, a binder and a sugar. The binder is a non-crosslinked polymer having in an unplasticized form a T. sub. g of at least 40. degree. C. Suitable sugars include sorbitol, glucose, sucrose and lactose.

US Patent:

46557822, Apr 7, 1987

Filed:

Dec 6, 1985

Appl. No.:

6/805531

Inventors:

Elizabeth J. McCallion - Hasbrouck Heights NJ
William Karpusiewicz - Floral Park NY
Charles F. Irwin - Randolph NJ

Assignee:

Lever Brothers Company - New York NY

International Classification:

C11D 304
C11D 312
C11D 3395
D06L 302

US Classification:

8111

Abstract:

A bleaching composition is disclosed wherein the bleach catalyst is an aggregate comprising manganese (II) cations adsorbed onto an aluminosilicate support, a binder and a phosphate salt; the aggregates have a diameter ranging from at least 250 to about 2000 microns which aggregates upon dispersion in water for two minutes at pH 10 and 40. degree. C. leave undissolved less than 5% particles of 125 microns or higher. The base detergent powder comprises a phosphate salt and a peroxy compound. It was found that bleach performance improves by having phosphate salt both in the aggregate and in the detergent powder base.

US Patent:

49178113, Apr 17, 1990

Filed:

Jan 3, 1989

Appl. No.:

7/292692

Inventors:

Jeffrey N. Foster - Rutherford NJ
William M. Karpusiewicz - Floral Park NY
Charles F. Irwin - Randolph NJ
Hien T. Pham - Fort Lee NJ
Michael P. Aronson - West Nyack NY

Assignee:

Lever Brothers Company - New York NY

International Classification:

C11D 3395
C11D 339
D06L 302

US Classification:

252 95

Abstract:

Dry, granular bleach compositions comprising an organic peroxycarboxylic acid as the active bleaching agent are obtained by cogranulating the acid with a strongly alkaline, hydratable inorganic or organic salt. These cogranulates show a reduced tendency to decompose or detonate. A typical cogranulate is made from diperoxydodecanedioic acid and dibasic sodium orthophosphate with seven moles of water of hydration. The cogranulates are useful as bleach ingredients in detergent and cleaning compositions.