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US 8,071,528 B2Granted
Cleaning compositions with water insoluble conversion agents and methods of making and using them
AssigneeEcolab USA Inc.
InventorsKim R. Smith, Keith E. Olson, Kristen A. Mills, Lee J. Monsrud, Michael Rischmiller
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Abstract
The present invention relates to cleaning compositions comprising conversion agents and methods of using them. The conversion agents of the present invention comprise water insoluble compounds such as metal oxides, metal hydroxides, and combinations thereof. The compositions can be substantially free of a builder, e.g., a chelating agent, sequestrant, and/or threshold agent, while still achieving effective soil removal.
Claims18
A solid cleaning composition comprising:
- (a) 1 to 50 wt % of a conversion agent comprising a water insoluble compound selected from the group consisting of magnesium oxide, magnesium and titanium hydroxides, and combinations thereof;
- (b) greater than about 20 wt % of an alkalinity source, wherein the conversion agent causes calcium hardness ions in a water source to substantially precipitate in a non-calcite crystalline form;
- (c) about 1 to about 50 wt % of a salt selected from the group consisting of monovalent alkali compounds having halide or sulfate as the anion;
- and
- d) 15 to about 50 wt % water;
- and
- the composition is free of chelating agent, phosphate and water soluble magnesium sources.
4 more elements
Dependencies are inferred from the claim text.