Compositions – Oxidative bleachant – oxidant containing – or generative – Free halogen or oxy-halogen acid type
Patent
1998-04-13
2000-03-28
Brouillette, Gabrielle
Compositions
Oxidative bleachant, oxidant containing, or generative
Free halogen or oxy-halogen acid type
25218724, 510370, 510379, 510380, A01N 300, A62D 300, C11D 300, C11D 718, C11D 942
Patent
active
060427442
ABSTRACT:
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.
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Nation Jayne Elisabeth
Thompson Katherine Mary
Thornthwaite David William
Brouillette Gabrielle
Cross LaToya
Honig Milton L.
Lever Brothers Company Division of Conopco, Inc.
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