Powdered detergent or soak
OwnerKarl H. Heinlein, Joachim Buschinventors
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Abstract
A powdered detergent suitable for use in home laundry machines contains (1) an acid component which provides an initial wash solution with a pH of 1-4 and (2) a coated alkali-supplying substance which neutralizes the acid wash solution within a period of about 2 to 25 minutes. The compositions may be free of phosphates and avoid the problem of ash build-up on fabrics usually caused by carbonate-based non-phosphate detergents.
Claims10
Powdered detergent or soak particularly for use in one of a preliminary and main washing cycle of household machines and laundry machines for washing in a phosphate-free wash liquor, which detergent forms with water an acid wash liquor with a pH of 1-4, and contains one or more solid or pseudo-solid acids, in addition to wash-active substances, characterized in that the detergent contains powdered portions, by means of which the acid wash liquor is neutralized or alkalized substantially or completely by itself within a period of about 2 to 25 minutes, and that these portions comprise one or more alkali-supplying substances from the group:
- sodium metasilicate, soda, water-glass, calcium oxide, magnesium oxide, magnesium oxychloride, calcium carbonate and magnesium carbonate, which substances are at least partly coated with one of a film that dissolves in the acid wash liquor and a non-ionic surfactant, wherein the detergent or soak specifically includes as at least part of the alkali supplying substance 8-25% by weight magnesium carbonate, 1-13% by weight magnesium oxide and 0-20% by weight calcium carbonate.
Powdered detergent or soak particularly for use in one of a preliminary and main washing cycle of household machines and laundry machines for washing in a phosphate-free wash liquor, which detergent forms with water an acid wash liquor with a pH of 1-4, and contains one or more solid or pseudo-solid acids, in addition to wash-active substances, characterized in that the detergent contains powdered portions, by means of which the acid wash liquor is neutralized or alkalized substantially or completely by itself within a period of about 2 to 25 minutes, and that these portions comprise one or more alkali-supplying substances from the group:
- sodium metasilicate, soda, water-glass, calcium oxide, magnesium oxide, magnesium oxychloride, calcium carbonate and magnesium carbonate, which substances are at least partly coated with a non-ionic surfactant wherein the detergent or soak specifically includes as at least part of the alkali-supplying substance 8-25% by weight magnesium carbonate, 0-13% by weight magnesium oxide and 0-20% by weight calcium carbonate.
Dependencies are inferred from the claim text.