DE4225832A1 - Hair perming compsn. - contg. thio:lactic acid, cysteine and ammonium chloride - Google Patents

Abstract

Thioglycolate-free hair perming compsn. (of the first/reducing phase) comprises (a) 0.1-55 wt.% of 2-mercaptopropionic acid and/or 3-mercaptopropionic acid; (b) 0.5-5 wt.% L-cysteine; and (c) 0.02-5 wt.% ammonium chloride. The finished prod. has a pH of 7.0-7.9. USE/ADVANTAGE - The compsn. is useful for perming. The compsn. does not cause irritation, bad smells, redness, etc. in skin and eyes.

Description

The present invention relates to thioglycolate-free hair duration ver molding agents of the first stage, which contain neutrali based thiolactic acid, cysteine and ammonium chloride.

Aqueous reducing agents are used for permanent hair shaping containing solutions, gels and / or emulsions. These preparations are applied to the towel-dried hair. After ten up to thirty minutes of exposure time, these preparations are rinsed removed with water. Then the reduced hair keratin groups by treatment with an oxidizing agent-containing preparation fixed again. The hair keratin-reducing components are the at the time mainly thioglycolate-containing agents were used. Especially the glycerol monothioglycolate-containing permanent shaping agents of the redu ornamental levels have had enormous application in recent years experience increase. Because of the saponifiability of glycerol mono The ready-to-use solution is thioglycolates only shortly before Ge need by mixing the concentrated glycerol monothioglycolate with an aqueous solution. During mixing and appli ornamental as well as by trial wrapping and not wearing protective hands The users of these preparations can wear shoes through skin contact with preparations containing thioglycolate, skin irritation and sensitivity sufferings. As a relatively strong sensitizing component glycerol monothioglycolate is known. Other thioglycolate compounds, like ammonium thioglycolate and ethanolammonium thioglycolate, can in case of irritation and sensitization. As pH neutral or permanent hair shaping agents adjacent to the pH neutral range preparations containing glycerol monothioglycolate are known in particular. However, these preparations are relatively weakly effective and - as described ben - skin incompatible. Furthermore, these preparations have a very un pleasant smell that, in common cases, lasts several days or weeks clinging to hair. Due to the 7.0-7.9 pH value, these have pre however, has a pronounced hair-gentle effect.

It was therefore the task of a permanent hair formulation the reducing stage to find a pH range that is appropriate not to be mixed before use and not to Irrita ions, sensitizations and unpleasant smells as well as others leads to negative side effects.

Surprisingly, it has now been found that a combination of Thiolactate, cysteine and ammonium chloride form a pronounced pH buffer effect in the aforementioned pH range. This is the realization a correspondingly tolerable hair-gentle and less unpleasant smelling one-component hair permanent shaping agent possible. To the This excellent pH buffering combination can be relatively high Amounts of basic reacting components are added without the pH is more than 7.9. Neutralized or to a pH of 7 discontinued solutions that contain this buffer combination, can, for example, with relatively high basic components Concentrate concentrations without the pH rising above 7.9 chert and thereby be optimized in the hair-reductive effect. Accordingly, e.g. B. those frequently used in permanent wave products Carbonate compounds of ammonia in usual concentrations of 2-6% can be used. The pH range constancy of 7.0-7.9 remains preserved, however. The hair treated with these agents will gentle, pH-mild and intensely brought into the desired shape.

After fixation of the hair keratin groups thus reduced lies as The result is an excellent elastic, permanently formed hair. The duration Forming durability or frill stability is at least as good shaped like the durability achieved with thioglycolates. During the Treatment does not cause irritation, no sensitization, none unpleasant smells and no negative consequences for permanent wave users. Even with customers who use these Preparations are treated, there is no redness, itching and none Burning symptoms in the skin contour and eye areas.

In addition, there is no need for prior production - by mixing different ones Components - of ready-to-use preparations.  

The following examples are intended to illustrate the subject matter of the invention lichen without restricting him to this. The specified therein Percentages relate to percentages by weight.

example 1 Perm for normal hair

30.0% alpha-thiolactic acid
21.0% ammonia solution, 25%, in water
2.8% cysteine
4.7% ammonium hydrogen carbonate
40.0% water, fully desalinated
0.3%

Perfume oil
100.0%

The pH of the preparation is 7.6

Example 2 Perm for dyed hair

11.0% 3-mercaptopropionic acid
9.0% ammonia solution, 25%, in water
2.0% cysteine
0.80% ammonium chloride
2.00% ammonium hydrogen carbonate
0.20% perfume oil
75.00%

Water, fully desalinated
100.00%

The pH of the preparation is 7.4.  

Example 3 Perm for permanent hair

50.0% alpha thiolactic acid
3.5% cysteine
2.0% ammonium chloride
34.0% ammonia solution, 25%, in water
6.0% ammonium hydrogen carbonate
0.5% perfume oil
4.0%

Water, fully desalinated
100.0%

The pH of the preparation is 7.8.

Example 4 Perm for bleached hair

4.0% alpha thiolactic acid
1.8% cysteine
1.0% ammonium chloride
3.5% ammonia solution, 25%
1.5% ammonium hydrogen carbonate
0.2% perfume oil
88.0%

Water, fully desalinated
100.0%

The pH of the preparation is 7.2.

Claims (8)

1. pH buffering combination in thioglycolate-free pH-7. . . Hair duration shaping agents of the reducing stage, characterized in that in the aforementioned means

• a) 0.1-55% by weight of alpha-thiolactic acid (2-mercaptopropionic acid) and / or beta-thiolactic acid (3-mercapto-propionic acid)
• b) 0.5-5% by weight L-cysteine
• c) 0.02-5% by weight of ammonium chloride are contained and
• d) the pH of the ready-to-use preparations is between 7.0-7.9.

2. Composition according to claim 1, characterized in that further Buffer components such as acetates, hydrogen carbonates and carbonates, can be included. 3. Means according to claims 1 and 2, characterized in that except for the reducing agents mentioned under 1 a) and 1 b) tere hair-reductively active components, such as sulfites, thiogly cerin and N-acetyl-L-cysteine. 4. Composition according to claims 1 to 3, characterized in that Ethanolamides, anionic surfactants and / or nonionic surfactants or contain ampholytic surfactants or cationic surfactants could be. 5. Composition according to claims 1 to 4, characterized in that hydrophobic components, such as essential oils, alpha-bisabolol, Wheat germ oil, cypress oil and water-insoluble vitamins can be hold.   6. Composition according to claims 1 to 5, characterized in that Bases such as ethanolamines and / or ammonia can be included. 7. Composition according to claims 1 to 6, characterized in that non-capillary active hair-care components, such as cation Active cellulose can be included. 8. Composition according to claims 1 to 7, characterized in that Plastic emulsions causing dyes and turbidity can be hold.