Stabilised bleaching compositions

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/39 (2006.01) C01B 15/10 (2006.01) C11D 3/10 (2006.01) C11D 3/12 (2006.01)

Patent

CA 2167160

There is provided a bleaching composition comprising alkali metal percarbonate as an oxygen releasing compound and alkali metal carbonate or bicarbonate particles of defined size (mean particle size of 250 µm or greater) preferably fewer than 20 % of the particles have a particle size of below 250 µm and fewer than 5 % of the particles have a particle size of below 150 µm. The particulate bleaching composition may form a component of a machine dishwashing composition, a bleach booster composition or in particular a laundry detergent composition. The percarbonate has increased storage stability in the compositions of the invention.

Une composition de blanchiment comprend du percarbonate de métal alcalin comme composé libérateur d'oxygène et des particules de carbonate ou de bicarbonate de métal alcalin d'une grosseur définie (grosseur particulaire moyenne de 250 mum ou supérieure), de préférence moins de 20 % des particules ont une grosseur inférieure à 250 mum, et moins de 5 % des particules ont une grosseur inférieure à 150 mum. La composition de blanchiment particulaire peut être un composant d'une composition pour machine à laver la vaisselle, une composition renforçant le blanchiment ou notamment une composition détergente pour blanchisserie. Le percarbonate a une stabilité à la conservation accrue dans les compositions de l'invention.

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