Title:
COMPOSITION AND METHOD FOR BLEACHING A SUBSTRATE
Document Type and Number:
WIPO Patent Application WO2001016261
Kind Code:
A3
Abstract:
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.
Inventors:
CARINA RICCARDO FILIPPO
FOX STEPHEN PAUL
KALMEIJER ROBERTUS EVERARDUS
KARLIN KENNETH DANIEL
THIJSSEN ROB
TWISKER ROBIN STEFAN
FOX STEPHEN PAUL
KALMEIJER ROBERTUS EVERARDUS
KARLIN KENNETH DANIEL
THIJSSEN ROB
TWISKER ROBIN STEFAN
Application Number:
PCT/EP2000/008078
Publication Date:
August 30, 2001
Filing Date:
August 16, 2000
Export Citation:
Assignee:
UNILEVER PLC (GB)
UNILEVER NV (NL)
LEVER HINDUSTAN LTD (IN)
UNILEVER NV (NL)
LEVER HINDUSTAN LTD (IN)
International Classes:
C07D213/38; C07D213/55; C07D401/14; C11D3/39; (IPC1-7): C11D3/39; C07D213/36; D06L3/02
Domestic Patent References:
| WO1997048710A1 | 1997-12-24 | |||
| WO2000029537A1 | 2000-05-25 |
Foreign References:
| DE19721886A1 | 1998-12-03 |
Other References:
DONG Y ET AL: "A HIGH-VALENT NONHEME IRON INTERMEDIATE. STRUCTURE AND PROPERTIES OF (Fe2(MU-O)2(5-Me-TPA)2)(ClO4)3", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,US,AMERICAN CHEMICAL SOCIETY, WASHINGTON, DC, vol. 117, 1995, pages 2778 - 2792, XP002040679, ISSN: 0002-7863
ZANG Y ET AL: "MODELS FOR NONHEME IRON INTERMEDIATES: STRUCTURAL BASIS FOR TUNING THE SPIN STATES OF Fe(TPA) COMPLEXES", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,US,AMERICAN CHEMICAL SOCIETY, WASHINGTON, DC, vol. 119, 7 May 1997 (1997-05-07), pages 4197 - 4205, XP002040680, ISSN: 0002-7863
ZANG Y ET AL: "MODELS FOR NONHEME IRON INTERMEDIATES: STRUCTURAL BASIS FOR TUNING THE SPIN STATES OF Fe(TPA) COMPLEXES", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,US,AMERICAN CHEMICAL SOCIETY, WASHINGTON, DC, vol. 119, 7 May 1997 (1997-05-07), pages 4197 - 4205, XP002040680, ISSN: 0002-7863
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