C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 3/395 (2006.01) C07D 213/38 (2006.01) C07D 213/55 (2006.01) C07D 401/14 (2006.01) C07F 13/00 (2006.01) C07F 15/02 (2006.01) C11D 3/39 (2006.01) D06L 3/02 (2006.01)
Patent
CA 2342820
The invention relates to catalytically bleaching substrates, especially laundry fabrics, with atmospheric oxygen or air. A method of bleaching a substrate is provided that comprises applying to the substrate, in an aqueous medium, an organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by atmospheric oxygen. 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 substantially devoid of peroxygen bleach or a peroxy-based or generating bleach system.
L'invention concerne le blanchiment catalytique de substrats, notamment de tissus lavables, par l'oxygène atmosphérique ou l'air. L'invention concerne un procédé de blanchiment d'un substrat consistant à appliquer sur le substrat, en milieu aqueux, une substance organique formant un complexe avec un métal de transition, ledit complexe catalysant le blanchiment du substrat par l'oxygène atmosphérique. L'invention concerne également une composition de blanchiment comprenant, en milieu aqueux, de l'oxygène atmosphérique et une substance organique formant un complexe avec un métal de transition, ledit complexe catalysant le blanchiment du substrat par l'oxygène atmosphérique. Ce milieu aqueux est sensiblement dépourvu d'agents de blanchiment peroxygénés ou de tout système de blanchiment à base de peroxy ou générant un peroxy.
Appel Adrianus Cornelis Maria
Carina Riccardo Filippo
Delroisse Michel Gilbert Jose
Feringa Bernard Lucas
Girerd Jean-Jacques
Gowling Lafleur Henderson Llp
Plc Unilever
The Sun Products Corporation
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