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US 8,476,216 B2Granted
Colored speckles having delayed release properties
AssigneeMilliken & Company
InventorGregory E. Fernandes
Life of this patent
Estimating the term…
Abstract
This invention relates to non-bleeding and controlled color-releasing speckles for use in granular laundry detergents and other consumer products. The speckles are comprised of a salt or salt-containing carrier, a coloring agent, and a water-insoluble (or minimally water-soluble) salt coating.
Claims20
A colored speckle comprising:
- a) a majority by weight of at least one salt or salt-containing carrier material;
- b) at least one coloring agent;
- and
- c) at least one water-insoluble salt coating;
- wherein the at least one carrier material and the at least one coloring agent form a carrier-coloring agent composite, and
- wherein the at least one water-insoluble salt coating is a product of a reaction between the carrier material and a water-soluble salt.
3 more elements
A colored speckle comprising:
- a) a majority by weight of at least one salt or salt-containing carrier material;
- b) at least one polymeric coloring agent;
- and
- c) at least one water-insoluble salt coating;
- wherein the at least one carrier material and the at least one polymeric coloring agent form a carrier-coloring agent composite, and
- wherein the at least one water-insoluble salt coating is a product of a reaction between the carrier material and a water-soluble salt.
3 more elements
A method for forming a colored speckle comprising the steps of:
- (a) providing at least one salt or salt-containing carrier material;
- (b) applying at least one coloring agent to the at least one salt or salt-containing carrier material to form a carrier-coloring agent composite;
- (c) applying at least one water-soluble salt to the carrier-coloring agent composite;
- and
- (d) allowing the at least one water-soluble salt to react with the carrier-coloring agent composite to form a water-insoluble salt on the surface of the colored speckle.
2 more elements
Dependencies are inferred from the claim text.