摘要 |
The invention relates a method of bleaching a substrate that comprises applying to a substrate, in an aqueous medium, a specified ligand which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by atmospheric oxygen. Also provided in an aqueous bleaching composition substantially devoid of peroxygen bleach or a peroxy-based or generating bleach system. Also provided is a method of treating a textile such as a laundry fabric whereby a complex catalyses bleaching of the textile by atmospheric oxygen after the treatment. The catalyst may be used in dry form, or in a liquor that is then dried, such as an aqueous spray-on fabric treatment fluid or a wash liquor for laundry cleaning, or a non-aqueous dry cleaning fluid or spray-on aerosol fluid.
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申请人 |
UNILEVER PLC;UNILEVER NV;HINDUSTAN LEVER LIMITED |
发明人 |
CARINA, RICCARDO, FILIPPO;FOX, STEPHEN, PAUL;KALMEIJER, ROBERTUS, EVERARDUS;KARLIN, KENNETH, DANIEL;THIJSSEN, ROB;TWISKER, ROBIN, STEFAN |