Depilatory compositions

Claim 2

An aqueous depilatory composition comprising: (a) from about 0.1M to about 2.0M of an active thiol agent; and (b) from about 0.01M to about 2.0M of biguanide or its salts; wherein said composition has a pH of from about 10.5 to about 12.5 at 25° C.

Claim 3

A depilatory composition as described in claim 1 wherein said active thiol agent is present at a level of from about 0.2M to about 1.0M.

Claim 4

A depilatory composition as described in claim 2 wherein said biguanide is present at a level of from about 0.5M to about 1.0M.

Claim 5

A depilatory composition as described in claim 3 wherein said composition has a pH of from about 11.0 to about 12.3.

Claim 6

A depilatory composition as described in claim 4 wherein the active thiol agent is selected from the group consisting of thioglycolic acid, thiolactic acid, and β-mercaptopropionic acid, the alkali and alkaline-earth metal salts of these thiol acids, α-mercaptoethanol, thioglycerols, 1,3-dithio-2-propanol, 1,4-dithio-2-butanol, 1,4-dimercapto-2,3-butanediol, 1.3-dithio-2-methoxypropane, 1,3-dimercapto-2-aminopropane, 1,4-dimercapto-2,3-diaminobutane, and mixtures thereof.

Claim 7

A depilatory composition as described in claim 5 wherein the active thiol agent is selected from the group consisting of thioglycolic acid, the alkaline-earth metal salts of said acid, and mixtures thereof.

Claim 8

A depilatory composition as described in claim 3, wherein said composition is a cream, lotion, or gel, and in addition contains from about 0% to about 5% of a filler, from about 0% to about 20% of an emulsifier, from about 0% to about 30% of a gelling agent or thickener, from about 0% to about 60% of an emollient, from about 0% to about 5% of a chelating agent, and from about 0% to about 5% fragrance and colorant.

Claim 9

A depilatory composition as described in claim 7, wherein said filler is selected from the group consisting of chalk, magnesium oxide and carbonate, clays, talc, fumed silica, and mixtures thereof.

Claim 10

A depilatory composition as described in claim 8, wherein said emulsifier is selected from the group consisting of anionic surfactants, nonionic surfactants, and mixtures thereof.

Claim 11

A depilatory composition as described in claim 9, wherein said thickener is selected from the group consisting of tragacanth, xanthan, karaya, and guar gums, clays, methyl or hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, fatty and polyvinyl alcohols, modified sugars and starches, and mixtures thereof.

Claim 12

A depilatory composition as described in claim 10, wherein said emollient is selected from the group consisting of paraffin, petrolatum, mineral oil, fatty alcohols, silicone oils, and mixtures thereof.

Claim 13

A depilatory composition as described in claim 11, wherein said chelating agent is selected from the group consisting of ethylenediaminetetraacetic acids, the salts of said acids, and mixtures thereof.

Claim 14

A depilatory composition as described in claim 7 wherein said composition is an aerosol, and in addition contains from about 0% to about 20% propellant.