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US 6,432,392 B1Granted
Antiperspirant salts, and methods of their preparation
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsAlexander Thomas Ashcroft, Philippa Margaret Smith
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Abstract
An antiperspirant active salt made by treating an aluminum salt of general formula; Al2(OH)6−aXa wherein X is Cl, Br or I, and a is 0.3 to 4.0, with an effective amount of a phosphorus containing material, and ageing the salt.
Claims4
A method of improving the antiperspirant efficacy of an aluminum compound having the empirical formula:
- Al2(OH)6−aXa
- wherein X is Cl, Br or I, and a is 0.3 to 4.0, comprising treating a solution of the aluminium compound with an effective amount of an acidic water soluble source of phosphorus, and ageing the resultant solution, to gain a salt with good antiperspirant efficacy.
A method of manufacturing a modified aluminium chlorhydrate composition comprising treating a solution of an aluminium compound having the empirical formula:
- Al2(OH)6−aXa
- wherein X is Cl, Br or I, and a is between 0.3 and 4.0, with an effective amount of an acidic water soluble source of phosphorus, and ageing the resultant solution, to gain a salt with good antiperspirant efficacy.
Dependencies are inferred from the claim text.