Cosmetic Cleanser Formulation

This invention relates to a novel cosmetic cleanser formulation, which is non-irritating and non-stinging.

It is, therefore, an object of the present invention to provide a cosmetic cleanser formulation. The cleanser can be used in conjunction with other cosmetic formulations.

The cleanser formulation is one of a four-component regime, which is used to treat sensitive skin. The other three components are: a toner, a moisturizer, and a cream. Each of the other three components is a separate invention; the toner is claimed in application Ser. No. 289,656, filed Aug. 3, 1981; the moisturizer is claimed in application Ser. No. 289,655, filed Aug. 3, 1981; and the cream is claimed in application Ser. No. 289,653, filed Aug. 3, 1981. The method of treating sensitive skin using the regime is claimed in application Ser. No. 289,658, filed Aug. 3, 1982. In addition a cream pack formulation is claimed in application Ser. No. 289,654, filed Aug. 3, 1981.

The cleanser formulation consists essentially of, in percent by weight:

One skilled in the cosmetic formulation art will appreciate that various preservatives can be added to the formulation in sufficient quantities. These preservatives include the esters of p-hydroxybenzoic acid, such as methyl p-hydroxybenzoate, and propyl p-hydroxybenzoate; cis-1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamatane chloride; ethylenediaminetetraacetic acid (EDTA) and salts of EDTA; imidazolidinyl urea; sodium N-lauryl-.beta.-iminodipropionate; and the like or any combination thereof. The total amount of preservative used can vary, but usually it is from about 0.3 to about 1.0 percent.

In addition, color and essence can be included in the formulation as desired. Color additives would include both natural and artificial dyes, such as carotenoid derivatives, D+C or F,D+C colors, and the like, while essences can include any non-irritating natural and artificial oils, perfumes, and the like.

The formulation is both non-irritating and non-stinging, according to standard cosmetic testing procedures. The first procedure utilized was the Lanman-Maibach Cumulative Irritation Test, which is a 21-day patch irritation procedure as described by Dr. B. M. Lanman at the Joint Conference on Cosmetic Sciences Apr. 21-23, 1968 in Washington, D.C. as further modified in Phillips, L., Steinberg M., Maibach, H., and Akers, W., Toxicology and Applied Pharmacology 21, 369-382 (1972). The non-stinging properties of the formulation were established by the Lactic Acid Sting Test as described in P. J. Frosch and A. M. Kligman: "A Method for Appraising the Stinging Capacity of Topically Applied Substances" Journal of the Society of Cosmetic Chemists 28, 197-209, May 1977.

In general, the individual ingredients used in the formulation should be of a quality or purity (such as U.S.P. or N.F.) suitable for cosmetic use.

The formulation is prepared by mixing the ingredients according to conventional methods and the preparation of this formulation is described in the following example. This example is illustrative of the formulation, but is not to be construed as limiting the invention.

Phase A is prepared in a jacketed tank equipped with a propeller stirrer and side-sweep mixer, heated to about 75.degree.-80.degree. C., and mixed until all the powders are dissolved. The gums of Phase B are added to the propylene glycol and mixed until a uniform slurry is obtained.

Phase B is slowly added to Phase A while mixing rigorously, but without aerating. The temperature is maintained at about 75.degree.-80.degree. C. and Phase AB is mixed until all the gums are dispersed.

The ingredients of Phase C are heated to about 75.degree.-85.degree. C. mixed until all the waxes are melted and all the powders dissolved.

Phase C is added to Phase AB while both are at about 75.degree.-80.degree. C. Phase ABC is mixed with side-sweep and propeller stirrer for about 15 minutes at about 75.degree.-80.degree. C., avoiding aeration. Mixing is continued and Phase ABC is cooled to about 50.degree.-55.degree. C. Then Phase D is added, and the product is cooled to about room temperature while mixing.