Alkali metal silicate composition with sodium carbonate additive
Patent 5338528 Issued on August 16, 1994. Estimated Expiration Date: June 14, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
423/333, By precipitating or gelling from silicate solution423/332, Alkali metal containing (Li, Na, K, Rb, or Cs)510/220, For use in automatic dishwasher510/232, With inorganic silicon containing component510/233, With alkali metal hydroxide, carbonate, bicarbonate, or sesquicarbonate component510/452, Spray-dried product, or process of preparing510/509, Alkali metal carbonate, bicarbonate, or sesquicarbornate component510/511, Inorganic silicon containing component510/531Detergent builder composition
The invention concerns a solid alkalimetal silicate having a molar ratio SiO2 :M2 O from about 1.5 to about 3, in which M is an alkalimetal and substantially consists of sodium and optionally potassium. The silicate contains from about 7 to about 20% by weight of sodium carbonate based on the dry material and has a water content from about 14 to about 22% by weight.Further, the invention concerns a method of preparing the silicate above, use of the same and cleaning agent compositions containing such a silicate.