US1771707A - Shaving soap - Google Patents

Description

Patented July 29, 1930 GEORGE r. 130mm, er woncnsrnn,;-ivrnssncnusnrms SHAVING SOAP I No Drawing.

This invention relates to soaps and particularly to a soap especially adapted for shaving or shampoo.

Among the objects of the invention are to provide a soap of suflicient hardness to adapt it to be manufactured in the form of a bar, dry stick, or powder, while at the same time possessing the capacity for forming a profuse lather. V

A-further object of the invention is the provision of a shaving soap including a specific ingredient for softening the beard.

Other objects of the invention will appear as the following description of a embodiment thereof proceeds.

Ordinarily hard soap is made by the saponification of talloW or other animal fat by means of an alkali such as caustic soda. The tallow contains two fatty substances, one of g which, stearin (C H O is solid, and the other, olein (C I-1 0 liquids, the quantity of stearin being about thrice that of olein. The presence of this proportion of olein in the soap detracts from its degree of hardness to an extent which renders it inadapted for pulverization, while the olein itself is ofonly fair capacity as a lather produceryas is also the stearin itself so that the average tallow soap is not characterized to a marked degree by thosequalities which go to make an ideal shaving soap.

By my invention the use of tallow as a base is avoided, the most desirable constituent of the tallow, that is to say the stearin being used in the form of stearic acid. The stearic acid used in this soap is what is known as triple pressed, the sameheretofore, when used in a predominating quantity, beingunfit for shaving soap due tothe impossibility of producing the moist 'lathernecessary in shaving. However, by mixing it as herein after'set forth with approximately one-third the quantity of cocoa-nut oil, with threethird of stearic acid properly proportioned with. lye, it has been found in practice that the stearic acidwill produce a hard soap,

thatflis, a soap very solid in texture, and which can be molded 1nto cakesor sticks or comminuted to produce a very fine soap for shaving, and will produce a lather especially preferred Application filed December Q9, ?;25. SeriaLIQ'a IF/EQBB.

desirable forithis purpose. Through .avoid- .anceof; the useeof oleingthe hardness. of the .soap.is greatly enhancedz-so that it; maybe formed into a dry stick of economicallhar'd- 1 ness, or. readily. comminuted into J a pulverulent material. .7

In place of the lolein II. substitute a vege-.

table oil such as cocoa-nut oil which contains a vegetable fat known as trilaurin (6 1-1 0 which does not diminish the? hardness of the soap and at the same time possesses when saponified a high degree of surface tension in aqueous solution, forming a profuse lather.

In carrying out the step of saponification I may use various proportions of stearic acid and cocoa-nut oil. For instance seven and one-half pounds of stearic acid may be melted with two and one-half pounds of cocoa-nut oil to which four pounds of lye are added. .10 In making a soap according to the present invention I have found that a lye containing lye solution is cooled down to Fahrenheit.

Stir as the lye is added.- It saponiiies immediately and heats up. Mix for ten minutes at which time the whole is saponified.

I/Vhen the saponification is completed other desirable ingredients such as glycerine, water and perfume may be incorporated and I also add a mild alkali such as borax in the pro- 1 portion of two ounces to the weights of the other ingredients above mentioned. This. alkali is for the specific purpose of softening the beard. The soap is then framed as usual and cut into bars, or if to be used in powder form it is permitted to harden and then pulverized. V

The boraX used is a very mild alkali, and in practice it has been found where used as a 5% part of thesoap of a solution, that it has a tendency to soften the beard without injury to the skin; in fact, to the most delicate of skins. e

While I have in the above disclosure de- 5 scribed a soap eminently adapted for shaving or shampoo, it is to be understood that my invention is by no means limited to a shaving soap but will be found equally good for most detersive purposes.

Having described my invention what I 7 claim as new and-desire to secure by Letters Patent, is e A shaving soap formed by mixing together i the following ingredients, triple pressed stearin acid approximately 53.6%, cocoanut 'oil approximately, 17.8%, sodium hydroxide approximately 14.3%, potassium hydroxide approximately 14.3% and borax approximately .5%. r

In testimony whereof I have hereunto set my hand.

GEORGE F. DORAN.