US2366759A - Brushless shaving preparation - Google Patents

Description

Patented. Jan. 9, 194

UNITED STATE s PATENT OFFICE BRUSHLESS SHAVING PREPARATION Richard Thomas, Bromborough, England, and

Harry Whitham,

deceased,

late of Upton,

ration of Maine No Drawing. Application October 24, 1940, Se-

rial No. 362,606. In Great Britain November 18,

4-Clalms: (01. 167 85) The present invention relates shaving preparations and more particularl to shaving compositions of the so-called brushless type. Unlike brushless shaving creams of the prior art, however, the. present shaving preparations may be prepared without a substantial moisture content, and may even be in a substantially anhydrous condition. Inaddition, the preparations may be produced in stick-like form whereby the compositions may be applied directly to the face without the use of any applicator other than the stick itself.

The brushless shaving creams of the prior art generally comprise a water and oil emulsion prepared by emulsifying, or beating to a cream-like consistency, water and fatty materials with the assistance of emulsifying agents such as soap. A moisture content of the order of at least 50% is conventional. A substantial moisture content has been thought to be essential heretofore to impart to the compositions the lubricating, hair-softening and other properties required for shaving purposes.

The brushless shaving creams of the conventional type being of moist cream-like consistency,

generally are inconvenient and, to some, objec tionable to use. This is particularly true in the application of the compositions to the face which necessitates the use of applicators, normally the fingers of the user. The prior art compositions generally are packaged in metal tubes which are inconvenient to handle, ,are generally wasteful,

and add to the cost of the final product.

We have discovered that the shaving preparations of our invention, unlike the prior art compositions, may be prepared without any substantial water phase and at the same time may have position. In some instances. we have found it desirable also to incorporate a small proportion of stearine.

It will be apparent that compositions composed of the above ingredients will be substantially insoluble in water and for desirable shaving characteristics, we have found it is desirable to impart hydrophilie properties to the mixture. Any conventional emulsifying agents may be utilised in suflicient amount to accomplish this result whereby a thin continuous layer or smear of the wax and oil composition is readily left on the wetted skin when the stick is gently rubbed thereon. Among the emulsifying agents which may be utilised for desirable results are soap, monoglycerides, and the fatty acid esters of polyglycerol, particularly the partial esters whichKcontain unesterified hydroxyl groups. These latter compounds may be prepared, for example, by partially esterifying tri-tetra glycerol with the fatty acids derived from vegetable oils.

The use of a mixture of fatty acid esters of polyglycerol of the type described above also is the application of the composition to all parts of the lubricating, hair-softening and-1 other properties desired in good grade shaving assistants. Moreover, the consistency of the compositions of our invention may be predetermined to provide a preparation both sufliciently solid to be molded in stick-like form-and sufliciently plastic when rubbed on the moistened face of the user to leave a layer, preferably opaque, having the necessary lubricating and other properties for shaving purposes. As a result the compositions when prepared in stick-like form may be applied to the face by direct application, i. e., without the use of any applicators other than the stick itself.

In carrying out our invention, the major proportion of our compositions preferably comprises a mixture of vegetable oil and a waxy ingredient. The particular vegetable oil or waxy ingredient selected is not critical. We prefer, in most cases,

to use an oil of the type of sesame, groundnut or olive oil, and the waxes which we prefer to use are the readily available spermaceti or ozokerite. The waxy ingredients, it is well-known, impart nonvanishing characteristics to the comthe surface to be shaved is readily indicated. It is generally preferred to utilise a harmles metal oxide such as titanium oxide, although other such ingredients capable of indicating the presence of the compositions on the face may be used.

The use of perfumes and other desirable ingredients known to the prior art is included within the scope of our invention. It will be apparent to one skilled in the art that the incorporation of such ingredients may be varied over a wide range provided the desired properties of, the composition are not adversely affected.

The ingredients preferably are selected, as described above, to form a shaving preparation which is practically insoluble in water, but possesses the hydrophilic, lubricating and. other properties required for shaving purposes. The proportions of the ingredients may be varied over a wide range provided the composition possesses the necessary consistency to be molded into stick form. In general, the consistency should be similar to that of an ordinary stick of shaving soap. A shaving preparation in accordance with the preferred form of our invention, for example,

Parts Sesame 38.75 Spermaceti F 45.00 Stearine 7.50 Tallow soap 1.50 Partial polyglycerol fatty acid esters 4.00 Titanium oxide 2.00 Perfume 1.25

In preparing a brushless shaving stick of this composition, the soap is added to the oil and the temperature raised to 180 to 190 C. and maintained at that point until the soap has completely dissolved. The solution is then allowed to cool to 80 C. The polyglycerol fatty acid esters and the titanium oxide are rubbed together, the stearine is added thereto and the mixture, heated to 80 C. poured into the solution of soap in oil and gently stirred. The spermaceti, melted and brought to a temperature of 80 C., is added and the whole mixture gently stirred until the temperature has fallen to 50 0. when the perfume is added. Stirring is continued until the temperature has fallen to about 45 0., the mixture is then poured into molds and allowed to cool to room temperature. The solidified mass is removed from the molds and out and trimmed to the desired size.

As described above, it is preferred to utilize the ingredients of our improved shaving preparations in such proportion that thereis formed a mixture possessing the desired lubricating, hairsoftening and other properties desired'for shaving purposes whichlmay be molded into stick form and may be applied as a thin layer on the face of the user without the use of any applicator other than the stick itself. To indicate more specifically, the variations in proportions of ingredients to which our invention is susceptible,

the following ranges of ingredients, if used, are preferred:

. Parts Vegetable oil 30to 60 Waxy substance 30 to 50 Stearine 5to Soap 1.5to 5 Polyglycerol fatty acid esters 2.0 to 4.0 Indicator 0.5 to 4.0

Perfume 0.5 to 1.5

In general, satisfactory results are obtained when the preparations contain substantially not less than 30% and preferably 33 to 40% vegetable oil, not less than 30% and preferably 40 to 45% waxy ingredient, not more than 10% and preferably 5 to 9% emulsifiers, and not more than or preferably 6 to 11% other ingredients.

It will be apparent that our invention is susl0 ceptible to many variations and all such variations are intended to be included within the scope of the following claims.

We claim: l. A brushless shaving preparation comprising a stick of a substantially solid mixture of 38.75 parts sesame oil, 45 parts spermaceti, 7.5 parts stearine, 1.5 parts tallow soap, 4 parts partial polyglycerol fatty acid esters, 2 parts titanium oxide, and 1.25 parts perfume, whereby said preparation may be applied directly to the face without the use of an applicator other than the stick itself.

2. A substantially non-aqueous brushless shaving preparation in stick-like form and adapted to be applied directly to the face without the use of an applicator other than the stick.

itself, said preparation comprising substantially 33 to 40 parts vegetable oil, 40 to 45 parts wax, and 5 to 9 parts of a glyceryl ester type emulsifying agent for imparting hydrophilic properties to said preparation.

3. A substantially non-aqueous brushless shaving preparation in stick-like form and adapted to be applied directly to the face without the use of an applicator other than the stick itself, said preparation comprising substantially- 33 to parts vegetable oil, 40 to parts wax, 5 to 10 parts stearine, 1.5 to 5.0 parts soap, 2.0 to 4.0 parts pclyglycerol fatty acid esters, 0.5 to 4.0 parts indicator for rendering the preparation visible when applied to the skin, and 0.5 to 1.5 parts perfume.

4 A substantially non-aqueous brushless shaving preparation in stick-like form and adapted 45 to be applied directly to the face, formed of a mixture comprising approximately 30% to 60% of a vegetable oil and approximately 30% to of a waxy substance so that the mixture is sumciently solid to be self-supporting when applied 50 to the face without the use of an applicator other than the stick itself and sufiiciently plastic when rubbed on the face to leave a layer. of the mixture, and an emulsifying agent of the glycerol ester'type in an amount of not more than 10% for imparting hydrophilic properties to said preparation.

RICHARD THOMAS. MAYWHII'HAM, Ezecutrix o] the Estate of Harry Whitham, 00 Deceased.'