Effervescent bleach compositions

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/10 (2006.01) C11D 3/00 (2006.01) C11D 3/37 (2006.01) C11D 3/39 (2006.01) C11D 3/395 (2006.01) C11D 7/54 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2270422

The invention relates to solid, effervescent bleach compositions comprising: (i) a bleach activator; (ii) an oxygen effervescence generator comprising a persulphate salt and a perborate salt, wherein the weight ratio of the persulphate salt to the perborate salt is in the range from about 0.8:1 to about 5:1; and (iii) a carbon dioxide efferverscence generator comprising a bicarbonate salt and an acid; wherein the weight ratio of the perborate salt to the bicarbonate salt is in the range from about 2:1 to about 20:1. The compositions provide excellent de-stain activity with improved effervescence and/or tablet disintegration. They are especially suitable in tablet form as denture cleansers.

L'invention concerne des compositions de blanchiment, effervescentes, solides et comprenant: (i) un activateur de blanchiment, (ii) un agent d'effervescence à base d'oxygène, comprenant un sel de persulfate et un sel de perborate, le rapport pondéral entre le sel de persulfate et celui de perborate se situant entre environ 0,8/1 et environ 5/1, et (iii) un agent d'effervescence à base de dioxyde de carbone, comprenant un sel de bicarbonate et un acide, le rapport pondéral entre le sel de perborate et celui de bicarbonate étant compris entre environ 2/1 et environ 20/1. Ces compositions possèdent une excellente activité détachante, ainsi qu'une meilleure effervescence et/ou désintégration de comprimés et elles se présentent de manière tout à fait appropriée sous forme de comprimés, en tant que nettoyants de prothèses dentaires.

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