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US 5,496,728 AGranted
Encapsulation of liquids in micro-organisms
AssigneeThe Procter & Gamble Company
InventorsFrederick E. Hardy, Alan D. Willey, Stefano Scialla
Life of this patent
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Abstract
Yeast or other micro-organism cells for use in the encapsulation of liquids (e.g. liquid bleach activators for use in laundry detergent compositions) are deodorised by treatment with a peroxygen bleach, e.g. hydrogen peroxide.
Claims6
A method for encapsulating a bleach activator in micro-organism cells for use in laundry compositions, said method comprising the steps of:
- (a) deodorizing intact microorganism cells with a peroxygen bleach under conditions whereby the odor of the microorganism cells is reduced while maintaining at least a portion of the deodorized cells intact;
- (b) contacting the deodorized microorganism cells from step (a) with a liquid selected from liquid bleach activators and liquids containing solvent and bleach activator under conditions whereby at least a portion of the bleach activator is encapsulated in the intact deodorized microorganism cells;
- and
- (c) collecting the microorganism cell-encapsulated bleach activator.
1 more element
Dependencies are inferred from the claim text.