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US 7,612,029 B2Granted
Controlled release using gels in a melamine foam
AssigneeThe Clorox Company
InventorsLafayette D. Foland, Mimi Y. Lee, David Lestage, Sara Morales
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Abstract
A substrate comprising a nonwoven layer containing an ionically crosslinked polymer can be used to control the release of active ingredients. The substrate can be a melamine foam and contain a surfactant and an alginate polymer crosslinked with calcium.
Claims14
A method of making a cleaning substrate comprising the steps of:
- a. providing a substrate layer comprising a melamine foam;
- b. forming an active layer on the substrate by
- i. contacting the substrate layer with a first composition comprising a saccharinic gum;
- and
- ii. then contacting the substrate layer with a second composition comprising divalent metal ions and their salts, trivalent metal ions and their salts, and mixtures thereof.
2 more elements
Dependencies are inferred from the claim text.