Microwave-dried amorphous alkali metal silicate powders and their use as builders in detergent compositions
AssigneeColgate-Palmolive Company
InventorCharles John Schramm, Jr.
Life of this patent
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Abstract
A microwave-dried amorphous alkali metal silicate detergent builder is provided characterized by a surface area of at least 20 m.sup.2 /gram and a water content of at least about 13%, by weight. The microwave-dried silicate provides effective complexation with hardness ion in wash water and more rapid solubility than conventional spray-dried silicate powders. The microwave-dried silicate can function as an efficient builder in laundry detergent compositions and over a broad range of laundry detergent applications.
Claims11
A microwave-dried amorphous alkali metal silicate detergent builder characterized by a surface area of at least about 20 m.sup.2 /gram, and a water content of at least about 13%, by weight, said alkali metal silicate builder being formed by drying an aqueous slurry consisting of said alkali metal silicate at ambient pressure and at a temperature of at least 212.degree. F. by means of microwave radiant energy to a water content of at least about 13%, by weight.
Dependencies are inferred from the claim text.