Back to results
US 4,708,816 AGranted
Bleach composition containing controlled density capsules
AssigneeThe Clorox Company
InventorsDaniel M. Chang, Richard J. Wiersema
Life of this patent
Estimating the term…
Abstract
Microcapsules having density controlled to be close to that of an aqueous solution are provided which may be dispersed in liquid bleaching solutions and which are useful as coloring or whitening agents.
Claims5
A composition useful for treating fabrics, comprising:
- a liquid hypochlorite bleaching solution having a predetermined solution density;
- and
- a plurality of microcapsules stably dispersed in the bleaching solution, the plurality of microcapsules having a controlled density distribution in the bleaching solution within about 0.05 g/cc of the solution density, the microcapsules having a polyethylene outer layer and an inner core selected from the group consisting of pigment, optical brightener and mixtures thereof, a density of the outer layer being less than the solution density, and a density of the inner core being greater than the solution density.
Dependencies are inferred from the claim text.