Low phosphate content dishwashing detergent

Details Low phosphate content dishwashing detergent Low phosphate content dishwashing detergent

C - Chemistry, Metallurgy

11

D

134/16

C11D 1/72 (2006.01) C11D 3/06 (2006.01) C11D 17/06 (2006.01)

Patent

CA 1094909

ABSTRACT OF THE DISCLOSURE A dry powder, detergent composition suitable for machine dishwashing and which may contain a low phosphate content utilizes as the essential combination of components an alkali metal tripolyphosphate or an alkali metal hexameta- phosphate, an appropriate proportion of an alkali metal carbonate, an alkali metal silicate, and a mixture or blend of liquid non-ionic surfactants which are sorbed on solid constituents of the composition to provide a detergent which exhibits superior performance in hard water notwithstanding the relatively low phosphate content of the composition. The liquid non-ionic surfactant mixture comprises a relatively low-foaming, water-soluble, non-ionic surfactant and a relatively high-foaming non-ionic surfactant. Optionally, an oil-soluble, liquid non-ionic surfactant can also be present in the blend. The weight ratio of the low-foaming surfactant to the balance of surfactant in the blend is about 1.5:1 to about 9 1, preferably about 2:1 to about 4:1.

281030

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