Method for reducing dye fading of fabrics in laundry...

Details Method for reducing dye fading of fabrics in laundry... Method for reducing dye fading of fabrics in laundry...

D - Textiles, Paper

06

L

D06L 3/00 (2006.01) C11D 3/39 (2006.01) C11D 3/395 (2006.01)

Patent

CA 2401651

A method of reducing dye fading of fabrics in laundry bleaching compositions is provided, comprising contacting stained fabric, in a wash liquor, with a bleaching composition that comprises a specified bleach catalyst. The bleach catalyst comprises a ligand which forms a complex with a transition metal, the complex catalysing bleaching of stains by atmospheric oxygen, and the composition is substantially devoid of peroxygen bleach or a peroxy-based or - generating bleach system. The bleaching composition provides effective bleaching performance on fabric stains without causing unacceptable dye damage or dye fading of the fabrics after repeated washes.

L'invention concerne un procédé pour diminuer la perte d'éclat des couleurs des tissus dans les compositions de blanchiment du linge. Ledit procédé consiste à mettre le tissu taché en contact, dans un liquide de lavage, avec une composition de blanchiment comprenant un catalyseur de blanchiment spécifié. Ce catalyseur de blanchiment comprend un ligand qui forme un complexe avec un métal de transition. Ce complexe catalyse le blanchiment des taches par l'oxygène de l'air, et la composition est pratiquement dépourvue de décolorant peroxygène ou de système de blanchiment à base de radicaux peroxyde ou générant de tels radicaux. La composition de blanchiment assure un blanchiment efficace des taches des tissus sans causer des dommages inacceptables aux couleurs ou une perte d'éclat des couleurs après des lavages répétés.

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