DE1148039B - Method of setting the hair - Google Patents

Description

Method for fixing the hair As is well known, it is often necessary human hair after washing, dyeing or permanent waving processes with To submit to fixing agents, since without such a measure the hair is too soft and is loose, difficult to style and the hairstyles that are preserved, especially lose their good fit quickly when exposed to moist air. Also will by setting the hair also the structure of the hair is strengthened so that the The possibility of hair damage, especially due to its fragility, is significantly reduced will.

Hair setting agents are usually made from water-soluble plant sludges such as tragacanth, carragheen moss, quince slime or from gums such as gum arabic, caraya gum or from pectins, agar-agar or the like., Obtained. Also methyl celluloses, cellulose ethers or esters, carboxymethyl cellulose in the form of alkali salts, also polyvinyl alcohol, Alginates, polyacrylates or methacrylates, wholly or partially saponified hard resins such as rosin and polyvinylpyrrolidone have been used for this.

All of these substances have the disadvantage that they can be washed out quickly and sensitivity to the action of moisture. They also camp because of the size of the molecules only superficially on the hair, often giving a gray shimmer and are very easy to remove when combing.

There are therefore already water-insoluble compounds such as ethyl celluloses, Shellac, resins of a natural or synthetic type, polyvinyl acetate or the like in Form of their solutions used in organic solvents. Such solutions but are because of their degreasing effect on the hair and scalp as well because of their flammability, their smell and also because of the relative unpopular at high prices. Aqueous dispersions of inherently insoluble solidifying agents, z. B. of polyvinyl acetate, also have the disadvantage that they are only superficial put on the hair.

After all, it is also known to cause permanent deformations of hair with aqueous solutions of a heat-curing precondensate of a urea-formaldehyde resin to effect. This creates three-dimensional aminoplasts, which after the end of the Condensation represent crumbly final condensates. They resist on the hair as a result lack of mechanical strength combing and brushing and also tend to due to their structure to dust formation and graying.

It has now been found that solutions of the curable mono- or Polymethylol compounds, as they are created by the conversion of certain organic nitrogen compounds, vornehmlidii aliphatic diamines with urea and subsequent reaction with Formaldehyde are obtained, especially suitable for fixing the hair. they form on the hair linearly constituted final condensates and vitreous films of high mechanical Strength. When treating hair with solutions of such precondensates, probably also partially cross-link with the hair keratin during the condensation process, occur significantly compared to the aforementioned and already known procedures Benefits a. The hair retains its natural shine, and that which solidifies or the already solidified film can be achieved by mechanical treatment such as combing or brushing, cannot be easily removed. Another major asset of the precondensates leading to linearly constituted films is that for the condensation not that of the condensation of urea-formaldehyde resins required condensation temperatures of 115 to 120 "C are required.

Rather, drying temperatures are sufficient in the claimed process from 40 to 800 C completely in order to achieve the formation of the desired linear resins and thus to achieve the necessary stiffening effects on the hair.

The nitrogen compounds produced by reacting with formaldehyde are suitable for producing the precondensates which can be used according to the invention the general formula X-Z-X or X-Z-X-Z-X or X-Z-X-Z-X-Z-X Here, X means one Remainder of the urea or thiourea. Z denotes an alkylene or cycloalkylene radical or a heterocyclic link.

The aforementioned curable mono- or polymethylol compounds should still be completely water-soluble, so that they can, for example, in the form of the 5- up to 200% of the above, preferably 8 to 100%, aqueous solutions by incorporation into the hair before styling or by spraying onto the hair after styling can be applied. The usual heat treatment to dry the washed or otherwise wet-treated hair is usually sufficient to cause hardening, which, moreover, also solely through the action of the air at normal temperature is achieved or completed after several hours.

The following should be mentioned as examples of compounds which are particularly suitable as hair-setting agents in dissolved form: Dimethylol compound of diethylene triurea Dimethylol compound of di-tetramethylene trithiourea Dimethylol compound of 2-oxoimidazoline-1,3-dicarboxamide. However, other mono-, di- or polymethylol compounds, for example ethylene diurea or hexamethylene diurea, can also be used.

The curable mono- or polymethylol compounds are in the Usually used in an aqueous solution as a hair-setting agent. But you can also find solutions use in organic solvents such as ethanol or isopropanol.

Also solutions in mixtures of water and organic solvents are applicable.

The solutions used according to the invention have compared to the known Means for fixing the hair have the advantage that the curable mono- or polymethylol compounds penetrate well into human hair, in and on this hardened and so in insoluble in water and against moisture insensitive, difficult to comb out deposits with excellent solidifying effect pass over.

The previously described solutions of curable mono- or polymethylol compounds can hair-setting agents known per se, as described in the introduction or plasticizing additives are added. One is that way able to coordinate strength, hardness and elasticity. These additions are stored during the hardening process. The otherwise observed washability or Sensitivity of the known hair-setting substances to moisture is significantly reduced when combined with the products according to the invention.

To achieve rapid hardening of the methylol compounds, it has proven to be useful to apply the solutions to the hair Synthetic resin precondensates still hardening to add catalysts. There are ammonium salts for it and alkanolamine salts of inorganic and organic acids and weak organic acids Acids in question. They accelerate the condensation of the precondensates, so that the desired films and the solidification effect can be achieved quickly.

Example 1 With a 100% aqueous solution of the dimethylol compound of diethylene triurea, which. 1010 more maleic acid is added, it becomes living Soaked women's hair, followed by wiping off the excess of the soaking solution the hairstyle is laid in the usual way. Then under the hood or dried by means of infrared radiation at temperatures of 40 to 70 "C. Here the hardening and fixing of the resin on the hair takes place.

Example 2 A suitable hair setting solution contains 8010 der Dimethylol compound of di-tetramethylene trithiourea and 0.8% maleamic acid Melamine and 2,5010 polyvinyl acetate, which has an average degree of polymerization of 50, in dispersed form. With this solution, human hair becomes treated in the manner described in more detail in Example 1.

Example 3 A 100 / above solution of the dimethylol compound of the 2 - Oxoimidazoline - 1,3 - carboxamides are made up by adding 10 / o glycolic acid PH 4.7 set. With this solution, human hair is made, as in Example 1 described, treated, squeezed, coiffed and dried.

Claims (3)

PATENT CLAIMS: 1. Use a solution that is curable and too linear built-up resins of condensable mono- or polymethylol compounds, such as them by reacting compounds of the general formula X-Z-X or X-Z-X-Z-X or X-Z-X-Z-X-Z-X where X is a urea or thiourea radical and Z is an alkylene or cycloalkylene radical or a heterocyclic intermediate member means with formaldehyde are available for setting and setting hair. 2. Use of a solution according to claim 1, characterized in that that the solution used additionally has a hair-setting effect known per se Contains substances and, if necessary, plasticizing substances. 3. Use of a solution according to claim 1 and 2, characterized in that that the solution used contains curing catalysts. Publications considered: Perfumery and Cosmetics, 1953, No. 6, p. 213.