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AssigneeSolvay Interox Limited
InventorsAlun P. James, Graham R. Horne, Richard Roesler, Soraya Parvaneh, Romano Pardini, Pier-Luigi Deli
Estimating the term…
Sodium percarbonate exhibits a tendency to decompose in built compositions and particularly detergent compositions built with zeolites. The tendency can be ameliorated by selecting sodium percarbonate which intrinsically has a mean particle size of from 500 to 1000 microns and not more than 20% by weight of below 350 microns and has a moisture pick-up when measured in a test at 80% relative humidity and 32° C. after 24 hours of not greater than 30 g/1000 g sample. A suitable sodium percarbonate can be made most conveniently by crystallisation from a bulk saturated solution of sodium percarbonate in a crystalliser/classifier that does not employ a conventional chloride salting-out agent.
Sodium percarbonate intrinsically having a mean particle size of from 500 to 1200 microns and no more than 20% by weight of a particle size below 350 microns and a moisture pick-up when measured in a test at 80% relative humidity and 32° C. after 24 hours of not greater than 30 g/1000 g sample.
A method of selecting sodium percarbonate for incorporation in a builder-containing composition comprising:
Dependencies are inferred from the claim text.