Cleansing articles with controlled detergent release and...

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 17/04 (2006.01) C11D 3/37 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2205428

The cleansing article comprises a porous pad which includes a controlled detergent release composition comprising: polyacrylamide (preferably having a weight average molecular weight greater than 200,000) and detergent preferably blended to provide a weight ratio of polymer solids: detergent solids between about 1:9 and about 1:100 and more preferably between about 1:12 and about 1:30. The method comprises preparing a coatable polymer/detergent blend comprising polyacrylamide, detergent and a liquid vehicle which on drying forms a controlled detergent release composition, applying said coatable blend to a porous pad, and drying said blend to provide said controlled detergent release composition. The controlled detergent release composition is substantially retained within the pad for subsequent use and thereafter slowly released when used.

L'article de nettoyage de l'invention comprend un tampon poreux renfermant une composition détergente à libération régulée constituée d'un polyacrylamide (ayant de préférence un poids moléculaire moyen au poids supérieur à 200 000) et d'un détergent de préférence mélangé de façon à avoir un rapport pondéral de solides polymères/solides détergents compris entre environ 1:9 et environ 1:100, et de manière plus souhaitable entre environ 1:12 et environ 1:30. Le procédé consiste à préparer un mélange d'application polymère/détergent comprenant un polyacrylamide, un détergent et un excipient liquide qui, lors du séchage, forme une composition détergente à libération régulée, à appliquer ce mélange d'application sur un tampon poreux et à sécher ce mélange pour obtenir une composition détergente à libération régulée. Cette composition est retenue dans le tampon en vue d'un usage ultérieur et se libère lentement lors de l'utilisation.

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