US1999160A - Cleansing cream containing - Google Patents

Description

Patented pr. 23, 1 935 CLEANSING GEE C(IBNT GNIESI RUE Bruce Walton, Glenbrook, Conn, assignor to Chas. Jill. Phillips "Chemical 0120., "Glenbroolr, Conn, a corporation of Connecticut No Drawing. Application llnly 29, 1933, Serial No. 682,881

d Claims.

skin cleansing cream containing free magnesium hydroxide and with a process of producing such a cream. Up to the present time attempts to produce a cream of this kind have always resulted in failure. It has been proposed, for example, to incorporate free magnesium'hydroxide with an ordinary ,soapbase liquid face cream, but experiment has shown that the soap reacts chemically with the magnesium hydroxide with the result that magnesium hydroxide is not present in the final product. A skin cream containing free magnesium hydroxide has, therefore, up to the present time not been known in the art. It has also been proposed to prepare mineral oil-aqueous suspensions of finely divided magnesium hydroxide, but these preparations are pharmaceutical liquid compositions which have no skin cleansing properties. a 7

It has now been found that a cleansing cream containing free magnesium hydroxide can be readily made by preparing a semi-colloidal nor-.

mally solid suspension of magnesium hydroxide, a wax and a viscous oily material. The magnesium hydroxide may be employed in amounts ranging from about 0.5% to 6%. If too much magnesium hydroxide is used the excess magnesium hydroxide will have a tendency to chalk out while if too little is employed the practical advantages of the cream are not realized. The magnesium hydroxide is preferably added in the form of an aqueous suspension of finely divided magnesium hydroxide. The preferred wax is white beeswax. Other waxes such as spermacetti', ceresin or white paramn wax niay, however, be employed. The amount of the wax employed may, for example, vary between about 1% and 6%. The particular amount required will depend on the hardness of the wax and upon the proportions of the more fluid ingredients which enter into the composition. .1

,The viscous oily material is preferably either a mineral oil or petrolatum or a mixture of both these ingredients. Vegetable oils may also be employed but they are not considered to be as satisfactory because they may become rancid on standing or upon exposure to the air.

example, ranging from about 30% to 60% of the final composition. The petrolatum may vary within a like range. The content of petrolatum or other semi-solid hydrocarbon may be lowered by increasing the amount of the mineral oil employed and by slightly increasing the amount of the wax. Likewise the petrolatum may be in- The Y mineral oil may be employed in an amount, for

(ill. 1107-91) The present invention is concerned with a novel creased at the expense of the mineral oil and a corresponding slight decrease in the wax content. The final product must, however, be a semi-solid colloidal mass if it is to be suitable as a cleansing cream. A product of this type will therefore be solid at normal room temperature. The petrolatum, mineral oil, etc. described above are referred to in the claims as viscous oils. The cream should preferably contain a limited amount of water. The water content may vary from about 10% to 30%. A certain amount of water is required in order to maintain the magnesium K hydroxidein a wet and suitably active form. It

has also been found advantageous to include a small amount of borax as a part of the final composition since it assists in the emulsification of the mixture. ,Since the wax is principally relied upon to produce the emulsion the use of other assistants is optional. Perfumes or coloring materials may be, of course, added to the cream as desired.

The. semi-colloidal suspension may, for example, be prepared in the following manner. The wax, mineral oil and petrolatum are first heated to a temperature of about 170 F. The borax is then thoroughly stirred with a 7% aqueous suspension of finely divided magnesium hydroxide and the mixture then added to the hot wax and oils. The composition is then further heated at about 170 F. and thoroughly agitated until a satisfactory emulsion or semi-colloidal suspension is obtained, after which it is allowed to cool to about 110 F., the perfume then added and the composition further cooled until it becomes a semisolid mass. x

The percentage composition of a typical cream prepared in the above manner is set forth below:

The cleansing properties of the magnesium hydroxide cream described above show a marked improvement over creams not containing this ingredient. The mild alkaline nature of the cream results in a slight astringent and whitening effect A upon the skin. Because of its semi-colloidal condition the magnesium hydroxide is in a very availtemperature containing a wax, a viscous oil, water and about 0.5% to 6% of free magnesium hydroxide.

3. A cleansing cream which is solid at room temperature containing a substantial amount of magnesium hydroxide in semi-colloidal form, a wax, a viscous oil and water.

4. A cleansing cream which is solid at room temperature containing about 1% to 6% of a wax, about 30% to 60% of mineral oil, about 30% to 60% of petrolatum, about 10% to 30% of water and about 0.5% to 6% of magnesium hydroxide.

BRUCE WALTON.