EP0446982A2
Expired / Lapsed
EP
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Low-temperature bleaching compositions
Assignee: Unilever PLC
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Filing: 1991-02-28
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Granted: —
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Expires: 2011-02-28
Abstract
Abstract A bleaching composition is described that includes a peroxygen compound such as sodium perborate, an oxygen transfer agent, suchas sulfonimine, and a bleach precursor such as TAED. These sulfonimines at relatively low concentration enhance the activity of the precursor. A method for bleaching substrates is also provided, especially a method for cleaning fabrics.
Inventors
- 👤 David John Batal
- 👤 Stephen Alan Madison
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 00:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/22; C; C11; C11D; C11D3/00; C11D3/39; A61K8/30; A61K8/46; A61Q; A61Q11/00; A61Q11/02; A61Q5/00; A61Q5/08; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917; C11D3/392
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
A bleaching composition comprising: ( i) from about 1 to about 60% by weight of a peroxygen compound; ( ii) from about 0.05 to about 10% of an oxygen transfer agent whose structure is: R¹R²C=NSO₂R³ wherein: R¹ may be a substituted or unsubstituted radical selected from the grouping consisting of hydrogen, phenyl, aryl, heterocyclic ring, alkyl and cycloalkyl radicals; R² may be a substituted or unsubstituted radical selected from the group consisting of hydrogen, phenyl, aryl, heterocyclic alkyl, cycloalkyl, R¹C=NSO₂R³, nitro, halo, cyano, alkoxy, keto, carboxylic, and carboalkoxy radicals; R³ may be a substituted or unsubstituted radical selected from the group consisting of phenyl, aryl, heterocyclic ring, alkyl, cycloalkyl, nitro, halo and cyano radicals; R¹ with R² and R² with R³ may respectively together form a cycloalkyl, heterocyclic, and aromatic ring system; and (iii) from about 0.1 to about 40% of a bleach precursor that reacts with peroxide anion and forms therewith a peracid or perimidic acid.
Claim 2
Dependent Claim
37 words
A composition according to Claim 1 wherein the peroxygen compound is present in an amount from about 1.5 to 25% and the oxygen transfer agent is present in an amount from about 0.2 to 5% by weight.
Claim 3
Dependent Claim
28 words
A composition according to Claim 1 or 2 wherein the peroxygen compound is an inorganic material selected from the group consisting of perborate, percarbonate, perphosphate, persilicate and monopersulphate,
Claim 4
Dependent Claim
22 words
A composition according to Claims 1-3 wherein at least one of R¹, R² and R³ is substituted with a water-solubilizing functional group.
Claim 5
Dependent Claim
31 words
A composition according to Claim 4 wherein the water-solubilizing functional group is selected from the group consisting of carboxylic acid, phosphoric acid, phosphonic acid, sulfuric acid, sulphonic acid and salts thereof.
Claim 6
Dependent Claim
48 words
A composition according to Claim 1 wherein said substituent on R¹, R² and R³ is a functional unit selected from the group consisting of nitro, halo, cyano, C₁-C₂₀ alkyl, amino, aminoalkyl, thioalkyl, sulfoxyalkyl, carboxyesters, hydroxy, C₁-C₂₀ alkoxy, polyalkoxy C₁-C₄₀ quaternary di- or tri-alkylammonium functional units and mixtures thereof.
Claim 7
Dependent Claim
16 words
A composition according to Claim 6 wherein said quaternary alkylammonium functional unit is a cholyl group.
Claim 8
Dependent Claim
42 words
A composition according to any of the preceding Claims 1-7 wherein the oxygen transfer agent is selected from N-(4-carboxybenzylidene)-4-chlorobenzene sulfonamide; N-(4-carboxybenzylidene)-benzene sulfonamide; N-(4-chlorobenzylidene)-4-carboxybenzenesulfonamide; N-benzylidene-4-carboxybenzene sulfonamide; N-(4-carboxybenzylidene)-4-carboxybenzenesulfonamide; N-(4-carboxybenzylidene)-3-nitrobenzenesulfonamide; N-(4-cyanobenzylidene)-4-carboxy benzenesulfonamide; N-(4-methoxybenzylidene)-4-carboxy benzenesulfonamide; N-(3-hydroxybenzylidene)-4-chloro benzenesulfonamide; bis-N-terephthalidene-4-carboxy benzenesulfonamide; 3-methyl-1,2-benzisothiazole-1,1-dioxide; N-(pyridinylmethylene) benzenesulfonamide; N-benzylidene benzenesulfonamide; and 1,2-benzisothiazole-1,1-dioxide.
Claim 9
Dependent Claim
26 words
A composition according to any of the preceding Claims 1-8 wherein the bleach precursor is selected from N,N,N',N'-tetraacetyl ethylenediamine; tetraacetyl glycoluril; glucose pentaacetate; and xylose tetraacetate.
Claim 10
Dependent Claim
30 words
A composition according to any of the preceding Claims 1-8 wherein the bleach precursor is selected from the group consisting of sodium nonanoylbenzenesulfonate, sodium benzoyl benzenesulfonate and sodium acetyloxybenzene sulfonate.
Claim 11
Dependent Claim
27 words
A composition according to any of the preceding Claims 1-10 wherein the bleach precursor is present in an amount from about 1% to about 10% by weight.
Claim 12
Dependent Claim
21 words
A composition according to any of the preceding Claims 1-11 further comprising about 1 to about 80% of a detergent builder.
Claim 13
Dependent Claim
33 words
A composition according to any of the preceding Claims 1-12 further comprising an effective amount for cleaning of an enzyme selected from the group consisting of proteases, cellulases, lipases, amylases and mixtures thereof.
Claim 14
Dependent Claim
84 words
A method for bleaching a stained substrate, said method comprising treating said stained substrate with a peroxygen compound, a bleach precursor and with an oxygen transfer agent whose structure is ; R¹R²C=NSO₂R³ wherein R¹, R² and R³ are as defined in Claim 1, bleaching occurring in a liquid medium containing about 0.05 to about 250 ppm active oxygen from the peroxygen compound, about 0.05 to about 200 ppm bleach precursor and about 0.01 to about 300 ppm oxygen transfer agent per liter of medium.
References Cited (Backward Citations)
No citation records indexed.
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