Lever Brothers Company, Division of Conopco, Inc.

Unilever Home and Personal Care Usa, Division of Conopco, Inc.

Lever Brothers Company

Chesebrough-pond's USA Co., Division of Conopco, Inc.

Unilever Home & Personal Care Usa, a Division of Conopco, Inc.

David William Thornthwaite

John Oakes

Katherine Mary Thompson

Stephen A Madison

Ronald Hage

Ton Swarthoff

Andrew Joiner

Daniel Convents

David Tetard

David Taylor

David W Roberts

Karen Anne Steele

Manmohan Bhakoo

Monique Doornink

Keith C Francis

Jean Hypolites Koek

Richard George Smith

Keith Jones

Peter S Sims

Jayne Elisabeth Nation

Joan Lesley Williams

Fraser William Whyte

Nicole Zwets

Sally Gillian Grimshaw

James R Darwent

Alexander Martin

David Victor Beggs

Christopher J Adams

Francis R McDonnell

Nicola Rogers

Stuart N Morgan

The invention relates to catalytically bleaching substrates, especially laundry fabrics, with atmospheric oxygen and a peroxyl species. A method of bleaching a substrate is provided that comprises applying to the substrate, in an aqueous medium, a specified organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by atmospheric oxygen and a peroxyl species. Also provided is a bleaching composition comprising, in an aqueous medium, atmospheric oxygen and an organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by the atmospheric oxygen, wherein the aqueous medium is provided with a peroxygen bleach or a peroxy-based or peroxy-generating bleach system.

Composition and method for bleaching a substrate

The present invention concerns deodorant products based on a synergistically active antimicrobial mixture of picolinic acid and a peroxyl species or equivalent source thereof. Also described is the cosmetic use of such products to treat malodour on the human body.

Antimicrobial deodorant compositions

Oxidation process and composition

Multiple component hard surface cleaning compositions

An oral composition comprising picolinic acid and a peroxyl species or equivalent source thereof, characterised in that the molar ratio of picolinic acid to peroxyl species or equivalent source thereof is from 1:30 to 100:1.

Oral composition

Multiple component bleaching compositions

Method and composition for enhancing the activity of an enzyme

The present invention relates to oral care compositions with an improved teeth whitening effect. This effect is achieved by inclusion in the oral care compositions of certain organic peroxy compounds as teeth whitening/bleaching agents, particularly peroxyamidophthalamides, sulphoperbenzoic acid, monoperoxyphthalic acid, and (per)acetylatedperboric acid with imine quaternary salts as catalysts for the peroxy compounds.

Oral composition with an improved teeth whitening effect

The invention provides a bleaching composition of pH 8-14 which comprises an oxygen transfer agent and hypochlorite or a source thereof and a method for bleaching a stained substrate which comprises the step of treating the substrate with a bleaching composition of pH 8-14 which bleaching composition comprises an oxygen transfer agent and hypochlorite or a source thereof. Particularly preferred oxygen transfer agents are imine quaternary ammonium salts such as N-methyl-3,4-dihydroisoquinolinium salts. Where these salts are used, suitable counter-ions include halides, sulphate, methosulphate, sulphonate, p-toluene sulphonate and phosphate. Oxygen transfer agents which comprise a quaternary nitrogen atom are preferred. In the alternative, the oxygen transfer agent can be a sulphonimine.

Bleaching compositions comprising hypochlorite and delivery systems

There is provided a cationic organic peroxyacid having the general formula ##STR1## wherein: R.sub.1 is an optionally substituted, linear or branched, C.sub.8 -C.sub.12 alkyl or alkenyl group; R.sub.2 and R.sub.3 are each a methyl group; R.sub.4 is an optionally substituted, linear or branched C.sub.3 -C.sub.5 alkyl or alkenyl group; p is 0 or 1; z is an integer selected from 0-3; y is an integer selected from 0-5; w is 0 or 1; and X.sup.- is a counter anion. This peroxyacid was found to have good bleaching performance without showing incompatibility with anionic surfactants.

Peroxyacids

Cationic peroxyacid are provided having formula (I): ##STR1## wherein: R.sub.1 is an optionally substituted C.sub.1 -C.sub.24 alkyl or alkenyl or alkylaryl with a C.sub.1 -C.sub.24 alkyl group; R.sub.2 and R.sub.3 are each independently a C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 substituted alkyl group; R.sub.4 and R.sub.6 are each independently aryl or (CH.sub.2).sub.n where n is an integer from 1 to 7; R.sub.5 is selected from hydrogen, C.sub.1 -C.sub.7 alkyl, or aryl substituted with a C.sub.1 -C.sub.2 alkyl; and X.sup.- is a counter anion. These cationic peroxyacids show good bleaching activity over a wide range of pH conditions.

Bleaching compositions comprising peroxy acid bleach precursors preferably based on acetylated pentose, hexose or lactose.

Bleach precursors

Novel cationic nitriles, methods of preparing such nitriles and use thereof as cationic peroxyacid bleach precursor in bleaching (detergent) compositions are disclosed. The novel cationic nitriles are non-hygroscopic and are characterized in that they have a counter-anion X.sup.- selected from the group consisting of 1) R-SO.sub.3.sup.-, 2) R-SO.sub.4.sup.-, 3) R-CO.sub.2.sup.-, wherein R is a straight or branched chain, optionally substituted, alkyl, alkylether or alkylene group containing 4 to 20 carbon atoms, or a phenyl or alkyl phenyl group containing 6 to 20 carbon atoms, and 4) any other surfactant anion not falling under the groups 1), 2) and 3).

Bleaching composition

Cationic peroxycarboxylic acids having the general formula (I) ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently a C.sub.1 -C.sub.7 alkyl group or C.sub.1 -C.sub.7 substituted alkyl group, n is an integer of from 2 to 10 and X is a counter anion. The peroxycarboxylic acids may be used in bleaching and detergent compositions.

Growing community of inventors

Bebington, United Kingdom

David William Thornthwaite