US2061468A - Soap preparation - Google Patents

Description

Patented Nov. 17, 1936 UNITED STATES SOAP PREPARATION Walter Kling, Chemnitz, Germany, assignor to H. Th. Bohme Aktiengesellschaft, Chemnitz, Germany, a corporation of Germany No Drawing. Application May 31, 1932, Serial No. 614,628. In Germany June 12, 1931 2 Claims.

This invention relates to soap compositions of such high quality as to be especially suitable as toilet soaps and as medicinal soaps, soaps of this character intended for use on the body being referred to herein as bath soaps to distinguish from industrial soaps and the like of a coarser nature.

More particularly, it relates to soap preparations having as the principal constituent one or more alkali salts of sulphuric derivatives of the higher aliphatic hydroxy hydrocarbons.

The soap compositions constituting the present invention contain in addition to these salts a superfatting agent, and one or more agents to give to the preparation some special property or properties, as will hereinafter be more clearly explained.

The sulphuric derivatives of the higher aliphatic hydroxy hydrocarbons from which the alkali salts are obtained may be esters, sulphonates, or mixed esters and sulphonates. The method by which these sulphuric derivatives are produced does not constitute part of the present invention, for suitable methods of producing the same are already known. The hydroxy hydrocarbons themselves may be obtained in the form of alcohols from natural waxes, or by the oxidation of saturated aliphatic hydrocarbons, or by the reduction of fatty acids or fatty acid derivatives. Instead of first producing the hydroxy hydrocarbon and then sulphonating, the reverse order may be followed.

The salts of sulphuric derivatives of higher aliphatic hydroxy hydrocarbons found suitable are those containing more than eight carbon atoms in the chain, such for example, as sodium dodecyl sulphate and sodium octadecenyl sulphonate.

The superfatting agents employed include, for example, wool fat, lanolin, higher aliphatic alcohols such as octadecenol and octadecanol, and other like products having similar properties.

In order to give the soap some special property making it suitable for a particular purpose, there is added a quantity of one or more therapeutic substances, antiseptic agents, dyestufis or perfumes, as is done in the preparation of ordinary bath soaps.

The soap preparations of the present invention may be compounded by incorporating the superfatting agent or agents into the sulphuric. derivative of the higher aliphatic hydroxy hydrocarbon before the same is neutralized for the formation of the sodium or other alkali salt.

The preparation may also be produced by partially sulphonating or sulphating a suitable fattralizing the sulphuric derivative.

ty alcohol or mixture of fatty alcohols, and neu- In this case, the unreacted excess of the higher aliphatic alcohol acts as the superfatting agent in the final product.

The therapeutic agent may be added to any of the ingredients used or to any mixture thereof so long as it does not interfere with the production of a composition of proper consistency, or will not itself be destroyed or otherwise rendered ineffective by the subsequent treatment in completing the preparation.

The proportions of the components in the soap preparations are not critical, but may be varied within wide limits, according to the particular agents used and the properties desired in the final product.

Example For the production of a soap composition suitable as a shaving soap, 90 kgs. of sodium dodecyl sulphate are mixed in any suitable machine with kgs. of lanolin and a small quantity of perfume.

same is shaped and pressed into bars in the usual manner, by means of a bar press.

In similar fashion special toilet and medicinal soaps may be made by adding to the basic mass, in addition to the superfatting agent, in the usual amounts, other agents customarily added to soaps, in particular, antiseptic or other therapeutic substances.

The soap preparations of the present invention have exceptionally high cleansing power and will not cause irritation of any kind on even the most sensitive skin. As contrasted with ordinary soaps, they have the advantage that they are not adversely aifected by use in very hard or even sea water, this quality being due to their absolute stability in the presence of lime and magnesia salts.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A bath soap composition adapted to produce When the mass becomes homogeneous, the V a non-alkaline solution upon hydrolysis in water,

WALTER KLING.