Builder agglomerates for laundry detergent powders

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 3/12 (2006.01) C11D 3/10 (2006.01) C11D 3/30 (2006.01) C11D 3/33 (2006.01) C11D 3/36 (2006.01) C11D 3/37 (2006.01) C11D 17/06 (2006.01)

Patent

CA 2344433

A process for improving storage stability and solubility of a laundry detergent powder includes the steps of: (a) forming a builder agglomerate which is free of sodium carbonate and (b) adding the builder agglomerate to a laundry detergent powder composition. The builder agglomerate is present in an amount in a range of from about 14 % to about 21 % by weight of the laundry detergent powder composition. The builder agglomerate has a composition including an aluminosilicate ion exchange and a binder selected from the group consisting of surfactants, polyethylene glycol, polyacrylates, and mixtures thereof. The builder agglomerate also includes sodium ditriaminepentaacetate (DTPA) and balance water but the builder agglomerate is free of sodium carbonate.

L'invention porte sur un procédé visant à améliorer la stabilité au stockage et la solubilité d'un détergent à lessive en poudre. Ce procédé consiste à: (a) former un agglomérat d'adjuvants exempte de carbonate de sodium et (b) ajouter l'agglomérat d'adjuvants à une composition détergente en poudre. L'agglomérat d'adjuvants est présent dans une quantité comprise entre environ 14 % et environ 21 % en poids de la composition détergente en poudre. L'agglomérat d'adjuvants a une composition comprenant un échange ionique d'aluminosilicate et un liant sélectionné dans le groupe comprenant des tensioactifs, un polyéthylène glycol, des polyacrylates, et des mélanges de ceux-ci. L'agglomérat d'adjuvants comprend également un ditriaminepentaacétate (DTPA) de sodium, le reste étant de l'eau, mais étant exempt de carbonate de sodium.

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