FI65908C - PROCESS FOR FAIRGOING AV HAOR I VILKEN DJUPHETEN AV NYANSEN GRADVIS OEKAS VID SUCCESSIVA BEHANDLINGAR - Google Patents

Description

65908 2 for application to hair, usually in combination with aminophenols, in admixture with an oxidizing agent - in particular I 2 Cl 2 or its derivatives such as urea peroxide, perborates, percarbonates, persulphates, perphosphates, periodates, etc. - where the so-called oxidative dyes or dyes are formed in situ in the hair. In the color formation reaction, the aromatic primary amino groups and phenol hydroxyl groups are oxidized in situ to form imino groups and CO groups, and in the coupling reaction, polyimino compounds are formed in which the aromatic rings are in the quinonoid form - e.g. It is also common to include coupling compounds, such as a polyhydric phenol, e.g. resorcinol, pyrogallol, etc., in the dye mixture. Atmospheric oxygen can be used as the sole oxidant in hair dyeing, but the use of I or C or its derivatives is generally preferred because the reaction proceeds faster with the latter. can be more easily regulated. Combinations that form oxidative dyes are usually combined with surfactants (detergents, wetting agents) and thickeners such as are common in hair detergents, making it easier to remove excess reagents by rinsing.

Women generally prefer staining methods in which the desired color is achieved with a single treatment. However, men are usually reluctant to dye their hair in such a way that a complete color change occurs in a single reading because they find this confusing. Numerous preparations have been marketed for men which gradually change or darken the color with repeated use of the dyeing combination at selected intervals, and the maintenance of the final desired color takes place with additional use at less frequent intervals. Such dye combinations usually use a heavy metal compound and some reagent to form a dark colored sulfide of the metal. Compared to oxidative dyes, however, these combinations lack versatility in the color tones of the available dyes.

Until now, it has been known to achieve a gradual darkening of the hair by repeatedly using an oxidizing dye mixture at successive 65908 intervals. It has also been known to vary the depth of tone by varying the concentration of the dye. The depth of tone has also been adjusted by increasing the duration of the treatment. By using trivalent phenol as the dye and oxidant, iodate, periodate or persulfate has been known to increase the depth of the dye tint obtained by increasing the concentration of the oxidant - whereby the oxidant and the dye were applied in the same or separate solvents.

Hitherto known methods of using aromatic primary amines and aminophenols as oxidative dyes for hair do not know how to vary the proportion or concentration of oxidant as a means of controlling the depth of color.

The hair coloring method according to the invention is characterized in that (a) the dye / oxidant mixture is applied to the hair several times in succession, whereby the undesired hair color is gradually removed, whereby (i) the color is applied to the hair for a short time of the order of 5-15 minutes; the time is substantially the same with each successive treatment, (ii) the amount of dye solution is such that it moisturizes the hair evenly, and is substantially the same with all treatments, (iii) the amount of oxidant in the mixture is 0.5-2 times the first treatment; compared to the amount required to oxidize the primary aromatic amines and aminophenols in the dye solution, and the amount of oxidant used in each successive treatment is a simple multiple of that used in the previous treatment to form a geometric series that eventually reaches an amount of oxidant 10 times greater than the amount of oxidant required for the above oxidation, (b) each mixture is capable of providing an oxidizing color to normal human hair, and (c) each color has a stronger shade than that used in the previous treatment, allowing the user to stop the dyeing process after achieving any desired color tone. color tone by repeating the treatment with the last mixture of dye and oxidant used.

65908 4

According to the invention, a dye solution is prepared containing a mixture of oxidizing dyes such as p-phenylenediamine, p-tolylenediamine, p-aminophenol, 2,4-diaminoanisole and p-methylaminophenol - usually with a coupling agent such as resorcinol - in combination with an aqueous excipient. which solution contains surfactants commonly used in hair detergents, such as Na-lauryl sulfate, Na-lauryldiethanolamine and the Na salt of ethylenediaminetetraacetic acid, as well as time reagents such as borax, morpholine and Na sulfite, which adjust the pH of the combination. . Fragrance can also be added. The concentration of the dye mixture (including the coupling compound (such as resorcinol)) is preferably between 0.5 and 8% by weight. The pH is preferably adjusted to between 8 and 10. For use with such a dye solution, an oxidizing solution is prepared - in particular solutions of equivalent value of a 6%; * · ** 2 ^ 2 ”derivative such as urea peroxide, perborate or percarbonate, persulphate or periodate.

For hair coloring - first to a light shade and then to successively deeper shades, a substantially constant amount of dye solution (suitable to moisten the scalp evenly) is mixed in successive treatments with the amount of oxidant solution added in each successive treatment (e.g. a total of 3 treatments). tone. In each case, after the mixture of dye and oxidant has been applied to the hair, the development of the color is allowed to take place for a certain time, which is the same for each treatment (e.g. 5, 10 or 15 minutes). The combination is then rinsed from the hair with water. After reaching the desired shade, it is maintained by re-applying the mixture used in the last treatment of the darkening series, at intervals such that new hair growth stains to the desired shade.

The method according to the invention is suitable for use without professional assistance, since the user only has to measure a certain substantially constant amount of dye solution in each treatment, mixes it with a similarly measured amount of oxidant solution - the amounts in successive treatments after the first preferably being simple multiples of the first application. apply the resulting mixture of dye and oxidant to the hair, wait for practically the same time each time - eg 5-15 minutes - and rinse the remaining mixture from the hair.

The following examples, in which parts and percentages are by weight, illustrate the method of the invention.

Example 1

An aqueous adjuvant is prepared which contains surfactants commonly used in hair detergents and pH adjusting agents and has the following composition: 311 parts of deionized water

Na sulphite 7 parts borax 15 parts morpholine 20 parts ethylenediaminetetraacetic acid tri-Na salt 5 parts N-lauroyl-diethanolamine 35 parts

Na-lauryl polyethylene glycol ether sulfate 60% 100 parts

Na-lauryl sulfate 30% 200 parts

Prepare 2 dye solutions having the following compositions - where the first (X) gives a light brown target shade and the second (B) gives a medium brown target shade: resorcinol 2.5 parts 2.5 parts p-phenylenediamine 6.0 parts 8.0 parts p- tolylenediamine sulphate 2.0 parts 5.0 parts p-aminophenol 3.0 parts 6.0 parts 2,4-diaminoanisole sulphate 0.25 parts 2.5 parts p-methylaminophenol sulphate 1.0 part 00.0 parts perfume (Lavender) 5, 0 parts 5.0 parts deionized water 302.0 parts 302.0 parts excipient as above 693.0 parts 693.0 parts_ 1014.75 parts 1024.0 parts

The pH of the obtained dye solutions is 9.5, which promotes the decomposition of Η2θ2: η and its peroxy derivatives.

As oxidants with the above dye solution, 6% (i.e., 20 parts by volume) is used or an aqueous solution of 6 65908 equivalents of superoxide, Na perborate or Na percarbonate can be used - replacing - if desired - part of the water to readily dissolve the propylene glycol. .

In practice, 30 ml of dye solution A are mixed with 2.5 ml of oxidant solution for the first treatment. The mixture is applied to the hair and allowed to develop for 5 minutes, which is a very short time according to standard dyeing standards. The hair is then rinsed. The treatment gives a barely perceptible brownish color. After the desired interval determined by the user (e.g. 1 week), a second treatment is performed, in this case using 5 ml of oxidizing solution with 30 ml of dye solution.

After 5 minutes of development, the hair is rinsed to give a light brown intermediate tone. Again, after the desired interval of about one week, a third application is made using 10 ml of oxidizing solution and 30 ml of dye solution. The development of 5 minutes, followed by rinsing, gives the final light brown target shade. This can be maintained by repeating the third treatment at such intervals (e.g. at intervals of about 2-8 weeks) that the new hair growth is colored to the target shade.

Similar treatments using dye solution B first give a light brown hue, then a darker brown intermediate color and finally a medium brown target shade. The maintenance of the final staining is carried out in the same way as in the case of dye solution A.

Example 2

Prepare three dye solutions having the following compositions - the first (C) giving a dark medium brown as the target shade - the second (D) a light medium brown - and the third (E) a light brown:

C D E

1. Deionized water 56.864% 57.410% 59.51% 2. Trisodium ethylenediaminetetraacetic acid 0.488 0.493 0.49 3. Sodium sulphite 0.684 0.690 0.68 4. Borax 1.465 1.478 1.46 5. Morpholine 1.953 1.970 1.94 6. Sodium lauryl polyethylene glycol ether 60%) 9,766 9,854 9.71 65908

C D E

7. Sodium lauryl sulphate (30%) 19.531 19.709 19.42 8. N-lauroyl-diethanolamide 6.418 6.449 4.85 9. Resorcinol 0.244 0.246 0.24 10. Paraphenylenediamine 0.781 0.591 0.58 11. Para-aminophenol 0.586 0.296 0.29 12. Paratolyethylenediamine sulphate 0.488 0.188. 2,4-diaminoanisole sulfate 0.244 0.025 0.05 13a. Paramethylaminophenol sulphate - 0.099 14. Perfume (Lavender) 0.488 0.493 0.49 100 .—% 100 .—% 100 .—%

To prepare the above dye solutions, the water (1) is heated to 80 ° C in a stirrer. Reagents 2, 3, 4 and 5 are added sequentially, each completely complete before the next addition. Reagents 6 and 7 are then added at the same temperature. Reagents 8 and 9 are then added sequentially at 70 ° C. Reagents 10, 11, 12 and 13 (as well as 13a in combination D) are added and stirring is continued for 15 minutes.

The mixture is cooled to 40 ° C and then reagent 14 is added. Example 3

Prepare two dye solutions having the following compositions - the first (F) giving a light brown as the target shade - and the second (G) giving a medium darker brown:

F G

1. Deionized water 56.84% 48.32% 2. Trisodium ethylenediaminetetraacetic acid 0.48 0.47 3. Sodium sulfite 0.67 0.66 4. Borax 1.44 1.41 5. Monoethanolamine 1, 91 2.67 6. Sodium lauryl polyethylene glycol ether sulphate (60%) 9.59 13.39 7. Sodium lauryl sulphate (30%) 19.18 20.78 8. N-lauroyl diethanolamide 5.36 7, 29 9. 4-Chloro-resorcinol 0.515 0.515 10. Paratolylenediamine sulfate 2.130 2.130 11. Meta-aminophenol sulfate 0.745 0.745 12. Para-aminodiphenylamine sulfate 0.650 0.650 13. 2,5-Diaminoanisole sulfate 0.50 14. Fragrance (Lavender) 0.48 0 47 8 65908 Dye solutions F and G are prepared essentially in the same manner as described in Example 2.

For hair dyeing, the dye solutions of Examples 2 and 3 are applied in substantially the same manner as described in Example 1.

In the first treatment, as described in the examples above, the amount of oxidant used should be 0.5 to 2 times the amount required to oxidize the aromatic primary amino groups and aminophenols contained in the components of the dye solution. In the second treatment, as described in the examples, the amount of oxidant used should be 1.0 to 4 times the amount required to oxidize the primary amino groups and aminophenols contained in the dye solution. In the third and subsequent maintenance treatments described in the examples, the amount of oxidant should be 2-10 times the amount required to oxidize the aromatic primary aminophenols contained in the dye solution used.

The colorant solutions described in the previous examples preferably have a content of surfactants of between 10-25%, pH-adjusting components of 2-10% and aromatic primary compounds of the aromatic amino group and aminophenols (with coupling agent or coupling agents) of between 0.5 and 8. %.

As described in the examples, the amounts of oxidant used in the first treatments after the first treatments are simple multiples of the amount used in the first treatment - especially multiples forming a geometric series (1,2, -4) - or simple multiples (1,2,3,4). A geometric series of multiples is preferred because it provides a substantially straight hair darkening to achieve the target tone. In all cases, the development time for each processing in the series is essentially constant - e.g., 5, 10, or 15 minutes.

Oxidizable aromatic primary amines and aminophenols, which can be used in dye solutions as such or in the form of their water-soluble salts, such as sulfates, hydrochlorides or acetates, can be selected from o, p- and m-phenylenediamine, p-aminodiphenylamine. p-Aminodiphenylamine sulfonic acid, 2-amino-4-nitrophenol, 4-amino-2-nitrophenol, p-aminophenol, m-aminophenol, o-aminophenol, o-, m- and p-methylaminophenol , 2-aminophenol-4-sulfonic acid, 4-aminophenol-2-sulfonic acid, o-anisidine, 2,4-diaminoanisole, 2,5-diaminoanisole, p, p'-diaminodiphenylamine, p, p'-diaminodiphenylamine sulfonic acid , p, p'-diaminodiphenylmethane, 1,8-diaminonaphthalene, 2,4-diaminophenol, 2,4-diaminophenol, 2,5-diaminophenol-4-sulfonic acid, N, N'-dimethyl-p-phenylenediamine, 4 , 6-dinitro-2-aminophenol, N- (p-hydroxyphenyl) glycine, N- (2-hydroxy-5-nitrophenyl) glycine, p-methylaminophenol, 4-nitro-o-phenylenediamine, m- and p-tolylenediamine and 2,4,6-trinitroaniline.

Coupling compounds that can be used in the dye solution include, for example, polyhydric phenols such as resorcinol, chloro-resorcinols, pyrocatechol, pyrogallol, and hydroquinone.

Surfactants suitable for addition to the dye solution or the oxidizing solution combined with it include, for example, higher fatty acid soaps, higher fatty alcohol-sulfuric acid ester salts of alkali metals, ammonium or aliphatic amines, higher fatty alcohol-tetraacetic acid-ethylene ethylene amide ethylene amides, alkali metal or ammonium salts.

Compounds suitable for pH control which may be added to the dye solutions described in the examples include alkylolamines such as amino, di- and triethanolamine, water-soluble alicyclic amines such as morpholine and alkali metal salts of weak inorganic acids such as borax, alkali metal alkali metal carbonates.

The oxidants used in the oxidizing solution of the example may be derivatives such as urea peroxide, alkali metal perborates, percarbonates, perphosphates, persulfates or periodates, as well as themselves.

Other variations that will be apparent to those skilled in the art may be made in the above examples and variations thereof without departing from the spirit or scope of the invention.

Claims (13)

A method of coloring hair by applying to the hair a mixture comprising a dye solution of a primary aromatic amines and aminophenols and an oxidizing agent which is hydrogen peroxide or a peroxy derivative, and allowing the mixture to act on the hair for a period of time to develop color, then rinsing the remaining mixture, characterized in that (a) the dye / oxidant mixture is applied to the hair several times in succession, whereby the undesired hair color is gradually removed, whereby (i) the color is applied to the hair for a short time of the order of 5-15 minutes, practically the same for each successive treatment, (ii) the amount of dye solution is such that it moisturizes the hair evenly and is practically the same for all treatments, (iii) the amount of oxidant in the mixture in the first treatment is 0.5-2 times the amount which required to oxidize v the primary aromatic amines and aminophenols in the solvent solution, and the amount of oxidant used in each successive treatment is a simple multiple of that used in the previous treatment to form a geometric series so as to finally reach an amount of oxidant 10 times the amount of oxidant required for the above oxidation, (b) to provide an oxidizing color to normal human hair, and (c) each color has a stronger shade than that used in the previous treatment, allowing the user to stop the coloring process after achieving any desired color tone and then maintain that color tone by repeating the treatment with the last dye and oxidant mixture. il 65908 Process according to Claim 1, characterized in that the amounts of oxidant used in the successive treatments of the series are essentially in the ratio of 1.2 and 4. Process according to Claim 1, characterized in that the dye solution contains polyhydric phenol as coupling compound. A method according to claim 1, characterized in that the dye solution contains a surfactant. Process according to Claim 1, characterized in that the oxidant is a Pereasu derivative of urea Peroxy and H 2 O 2. Process according to Claim 1, characterized in that the amount of oxidizable aromatic primary amines and aminophenols contained in the dye solution, together with all the coupling compound contained therein, is between 0.5 and 8% by weight of the solution. Process according to Claim 1, characterized in that the oxidant is used in a solution having the same oxidation potential concentration as a solution having an H 2 O 2 content of about 6%. A method according to claim 1, characterized in that the amount of dye solution used in each treatment is about 30 ml and the amounts of oxidant solution used in three successive treatments are 2.5, 5 and 10 ml, respectively. Process according to Claim 1, characterized in that the pH of the mixture used in each successive treatment is between 8 and 10. Process according to Claim 1, characterized in that the dye solution contains 2.5 parts of resorcinol, 6 to 8 parts of p-phenylenediamine, 2 to 5 parts of p-tolylenediamine sulphate, 3 to 6 parts of p-aminophenol, 0.25 to 2.5 parts. - one part 2,4-diaminoanisole sulphate, up to 1 part p-methylaminophenol sulphate, 5 parts perfume, 7 6 5 908 parts Na sulphite, 15 parts borax, 20 parts boron, 35 N-lauroyldiethanolamine, 5 parts ethylenediaminetetraacetic acid Na-lauryl polymethylene glycol ether sulphate, 60 parts Na-lauxyl sulphate and about 793 parts water, and the oxidizing solution contains 6% 10 65908 Process according to Claim 1, characterized in that the dye solution contains 0.24 to 0.246 parts of resorcinol, 0.58 to 0.781 parts of paraphenylenediamine, 0.29 to 0.86 parts of paraaminophenol, 0.197 to 0.488 parts of paratolylenediamine sulphate. tia, 0.025 to 0.244 parts of 2,4-diaminoanisole sulfate, up to 0.099 parts of p-methylaminophenol sulfate, 0.488 to 0.493 parts of perfume, 0.68 to 0.69 parts of sodium sulfite, 1.46 to 1.478 parts of borax, 1.94 to 1.97 parts of parts of morpholine, 0.488 to 0.493 parts of the trisodium salt of ethylenediaminetetraacetic acid, 9.71 to 9.854 parts of sodium lauryl polyethylene glycol ether sulphate (60%), 19.42 to 19.709 parts of sodium lauryl sulphate (30%), 4.85 to 6.85 lauroyl diethanolamide and 56.864 to 59.51 parts of water. Process according to Claim 1, characterized in that the dye solution contains 0.515 parts of 4-chlororesorcinol, 2.13 parts of paratolylenediamine sulphate, 0.745 parts of meta-aminophenol sulphate, 0.65 parts of para-aminodiphenylamine sulphate, up to 2 parts of 2.5- diaminoanisole sulphate, 0.47 to 0.4 parts of perfume, 0.66 to 0.67 parts of sodium sulphite, 1.41 to 1.44 parts of borax, part of monoethanolamine, 0.47 to 0.48 parts of the trisodium salt of ethylenediaminetetraacetic acid, , 59 to 13.39 parts of sodium lauryl polyethylene glycol ether sulfate (60%), 19.18 to 20.78 parts of sodium lauryl sulfate (30%), 5.36 to 7.29 parts of N-lauryl diethanolamide and -56, 84 parts water. 13 Patentkrav: 6 5 90 8