Chesebrough-pond's USA Co., Division of Conopco, Inc.

Chesebrough-pond's USA Co.

Andrew C Park

Allan Robert Burger

A method of inhibiting the dissolution in anhydrous ethanol or isopropanol of a powdered aluminium-containing basic halide antiperspirant agent which comprises incorporating in the ethanol or isopropanol an amount effective to inhibit said dissolution of an alcohol soluble or alcohol-insoluble dissolution-inhibiting compound selected from the group consisting of compounds having a basic nitrogen function and compounds having a basic oxygen function. Examples of dissolution-inhibiting compounds are urea, thiorea, amino acids, C.sub.1 -C.sub.20 alkylamines and hydroxyalklyamines, inorganic bases, and alkali metal and alkaline-earth metal salts of inorganic acids and C.sub.1 -C.sub.20 organic carboxylic acids. The dissolution-inhibiting compound may alternatively be a particulate alcohol-insoluble inorganic drying agent such as a molecular sieve.

Method for inhibiting the dissolution of antiperspirant compounds in

A solid antiperspirant product, such as a stick, suitable for topical application to the skin comprises an antiperspirant agent in the form of fine particles dispersed in a solid matrix. The matrix comprises anhydrous ethanol, anhydrous isopropanol or a mixture thereof, an hydrophobically-treated clay as a suspending agent, a gelling agent and other antiperspirant adjuncts as required. The weight ratio of the suspending agent to the anhydrous alcohol is from 1:3 to 1:15 to achieve maximum efficacy as measured by sweat weight reduction following topical application of the product to perspiring skin.

Cosmetic product

A roll-on antiperspirant lotion type composition comprising particles of an antiperspirant agent suspended in a liquid carrier medium wherein the suspending agent is a hydrophobic clay and the liquid medium consists of ethanol or isopropanol or a mixture thereof and 0% to about 3.times.C% by weight of the total liquid medium of one or more liquids less volatile than ethanol or isopropanol provided that where such other liquid comprises a non-polar and water-immiscible liquid such non-polar water-immiscible liquid is present in an amount of not more than about 2.times.C% by weight of the total liquid phase, where C is the percentage weight of the hydrophobic clay in the composition.

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Merseyside, United Kingdom

Andrew C Park