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US 11,649,417 B2Granted
Colored speckles for use in granular detergents
AssigneeMilliken & Company
InventorsSteven Spanhove, Gregory Edward Fernandes
Life of this patent
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Abstract
This invention relates to non-bleeding, non-staining colored speckles for use in granular or powdered detergents such as laundry detergents and automatic dishwashing detergents. The colored speckles are comprised of a salt or salt-containing carrier and a coloring agent and are characterized as being substantially uniformly colored throughout the cross-sectional volume of the speckle.
Claims14
A method for making a colored speckle having a cross-sectional volume that is substantially uniformly colored by at least one coloring agent consisting of the following steps:
- (a) providing at least one salt carrier material, wherein the carrier material has an interior surface and an exterior surface, and wherein the carrier material is granulated or ungranulated,
- (b) adding at least one polymeric colorant to the at least one salt carrier material to form a carrier-coloring agent composite,
- (c) drying the carrier-coloring agent composite,
- (d) exposing the carrier-coloring agent composite to a pressure agglomeration process to form an agglomerated carrier-coloring agent composite, wherein the pressure agglomeration process is achieved by forcing the composite between two compaction rolls that apply a pressure to the composite so that the rotation of the rolls transforms the composite into a compacted sheet and/or flake, and
- (e) optionally, exposing the agglomerated carrier-coloring agent composite to a process which reduces the size and/or the shape of the agglomerated carrier-coloring agent composite.
2 more elements
Dependencies are inferred from the claim text.