Perhydrolysis-selective bleach activators

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/39 (2006.01)

Patent

CA 2196703

Bleaching compositions, laundry and automatic diswashing detergent compositions comprising particular neutral or anionically charged substituted bleach activators are provided. More specifically, the invention relates to compositions which provide enhanced cleaning/bleaching benefits through the selection of perhydrolysis-selective bleach activators having specific leaving groups with a conjugate acid pKa above 13 and with specific ratios of the rate of perhydrolysis to the rate of hydrolysis and the rate of perhydrolysis to the rate of diacylperoxide production. Included are preferred activator compounds and methods for washing fabrics, hard surfaces, and tableware using the activators.

La présente invention concerne des compositions de blanchiment, des compositions détergentes de blanchisserie et de lave-vaisselle comprenant des activateurs de blanchiment substitués, particulièrement neutres ou anioniquement chargés. En l'occurrence, l'invention concerne des compositions procurant un effet accru de nettoyage/blanchiment grâce au choix d'activateurs de blanchiment à sélectivité perhydrolytique présentant des groupes partants spécifiques dont le pK¿a? acide conjugué est supérieur à 13, lesquels activateurs sont caractérisés par des valeurs spécifiques pour les rapports entre taux de perhydrolyse et taux d'hydrolyse ainsi qu'entre taux de perhydrolyse et taux de production de diacylperoxyde. L'invention concerne également des composés d'activateurs préférés et des procédés de lavage de tissus, de surfaces dures et de vaisselle de table en employant ces activateurs.

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