High density, high alkalinity dishwashing detergent tablet
AssigneeThe Procter & Gamble Company
InventorsJurgen W. K. Gromer, Hans J. Pracht
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Abstract
A detergent tablet containing a builder salt has an alkalinity of at least equivalent to 3 g. of sodium hydroxide per 100 g. of the tablet composition and a density of at least 1.4 g./cc. The builder salt can be a mixture of a silicate salt and a phosphate salt, preferably with more silicate, for example sodium metasilicate, than phosphate, for example sodium tripolyphosphate. The tablets are preferably free of surfactant materials and are especially adapted for use in automatic dishwashing machines.
Claims12
A rapidly dissolving detergent tablet for use in an automatic dishwasher, having a density of at least 1.4 g./cc. and an alkalinity equivalent to at least 3 g. of sodium hydroxide per 100 g. of the tablet composition, comprising a builder salt and from about 0.1 to about 2% of a surfactant.
A surfactant-free detergent tablet having a density of at least 1.4 g./cc. and comprising (a) from 50% to 90% of a water-soluble silicate salt and (b) from 10% to 40% of a water-soluble phosphate salt.
A process for preparing a rapidly dissolving automatic dishwasher detergent tablet having a density of at least 1.4 g./cc., containing from about 0.1 to about 2% of a surfactant, wherein a particulate mixture of builder salts including a water-soluble silicate salt and a water-soluble phosphate is compressed at a pressure of from 200 to 3,000 kg./sq.cm.
Dependencies are inferred from the claim text.