Unilever Home and Personal Care Usa, Division of Conopco, Inc.

Unilever Patent Holdings B.v.

David Tetard

Ronald Hage

David William Thornthwaite

Ton Swarthoff

Riccardo Filippo Carina

Adrianus Cornelis Appel

Robin Stefan Twisker

Stephen William Russell

Jean-Jacques Girerd

Jalila A Simaan

Michel Gilbert Jose Delroisse

Fr&eacute;d&eacute;ric Banse

Michel G J Delroisse

The invention relates to catalytically bleaching substrates, especially laundry fabrics, with atmospheric oxygen and a peroxyl species. A method of bleaching a substrate is provided that comprises applying to the substrate, in an aqueous medium, a specified organic substance which forms a complex with a transition metal, the complex catalysing bleaching of the substrate by atmospheric oxygen and a peroxyl species. 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 provided with a peroxygen bleach or a peroxy-based or peroxy-generating bleach system.

Composition and method for bleaching a substrate

The invention relates to catalytically bleaching substrates, especially laundry fabrics, with a bleaching composition using either air or a peroxyl source.

The present invention relates to new macrocyclic bleach catalysts, to formulations comprising these catalysts, as well as bleaching processes which employ these catalysts. These catalysts exhibit unexpected hydrolytic stability, as well as stability against metal abstraction by metal abstracting agents.

Bleach catalysts and formulations containing them

Compounds are provided that may be used as ligands in transition metal complexes, in turn useful as bleach catalysts. Also provided are complexes, bleaching compositions and methods of using the compounds.

Bleach catalyst and composition and method for bleaching a substrate

Ligand and complex for catalytically bleaching a substrate

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Wirral, United Kingdom

David Tetard