Patent Application
20110240052
The present invention concerns a composition for the permanent shaping of human hair used both for the permanent waving of human hair with an excellent waving effect as well as for the straightening of either naturally or chemically curled hair.
It is generally known that permanent waving is carried out in two steps, the reductive splitting of the cysteine disulfide bonds in the hair by a reducing agent and the subsequent neutralization by application of an oxidizing agent, whereby the cysteine disulfide bonds are restored.
The reducing agent still most frequently used today is thioglycolic acid, also in form of the salts thereof, in particular its ammonium salt, although numerous other thio compounds have been proposed for this purpose, which, however, mostly did not succeed.
The compositions containing thioglycolates are customarily applied at a pH-value between 7 and 10, in particular 8.5 and 9.5.
Such compositions vary in their waving and/or straightening performance and, therefore, there is still need for further improvement, especially in permanent shaping of damaged to strongly damaged hair and in particular for permanent shaping hair streaks including parts with various damage level in length.
Cationic or cationizable surfactants have commonly been used in permanent shaping compositions for hair. The ones used are alkyl amine or alkyl quaternary amine types and not the ones described in the present invention.
The present invention starts from the task of providing a composition for the permanent shaping of human hair with excellent waving and straightening performance. Hair waved or straightened with composition disclosed herein looks and feels natural upon touching by hand. For waved hair it is especially important that the hair has excellent elasticity and bounce.
It has surprisingly been found our by the inventors of the present invention that a permanent shaping composition for hair based on at least one reducing agent further comprising an aqueous emulsion of a high viscosity silicone copolymer and at least one alkyl ether or ester or amine alkyl amine or quaternary ammonium compound shows excellent waving effect and further hair feels natural upon touching and excellent shine, elasticity and bounce.
Accordingly, the first object of the present invention is an aqueous composition for permanent shaping and/or straightening hair based on at least one reducing agent and further comprising an aqueous emulsion of divinyldimethicone/dimethicone copolymer with an internal phase viscosity of more than 1×108 mm2/s measured at 0.01 Hz and at about 25° C. and at least one compound according to general structure
R1-A-R2—B
wherein R1 is a saturated or unsaturated, straight or branched alkyl group with 8 to 24 C atoms, R2 is a straight or branched alkyl group with 1 to 4 C atoms, A is a group selected from O,
and B is selected from
wherein R3 and R4 are the same or different is H or an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms and di hydroxyl alkyl with 2 to 4 C atoms,
R5, and R6 are the same or different, an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms and di hydroxyl alkyl with 2 to 4 C atoms, R7 is an alkyl with 1 to 4 C atoms, hydroxyl alkyl with 1 to 4 C atoms or di hydroxyl alkyl with 2 to 4 C atoms and
-R2-A-R1
wherein R1, A and R2 have the above meaning and X is chloride, bromide, methosulfate.
Aqueous composition of the present invention comprise aqueous emulsion of divinyldimethicone/dimethicone copolymer with a viscosity of more than 1×108 mm2/s, preferably 1.1×108 mm2/s, and more preferably 1.2×108 mm2/s. Divinyldimethicone/dimethicone copolymer is comprised in compositions of the present invention at a concentration of 0.01 to 5% by weight, preferably 0.02 to 3%, more preferably 0.05 to 2.5% by weight and most preferably 0.1 to 1.5% by weight calculated to total composition as Divinyldimethicone/dimethicone copolymer.
In a preferred embodiment of the present invention, aqueous divinyldimethicone/dimethicone copolymer emulsion comprises non-ionic surfactants and dispersed droplet has an average droplet size of smaller than 0.6 μm. Suitable divinyldimethicone/dimethicone copolymer emulsion with an internal phase viscosity at 0.01 Hz more than 1.2×108 is available from Dow Corning under the trade name HMW 2220. The non-ionic emulsion comprises C12-13 Pareth-23 and C12-13 Pareth-3 as non-ionic emulsifiers.
All concentration mentioned within the description refers to the concentration of the respective compound in the composition prior to mixing with any other composition, if necessary, unless otherwise mentioned.
Compositions of the present invention comprise at least one alkyl ether alkyl amine or alkyl ether alkyl quaternary amine or alkyl ester/amide alkyl amine or alkyl ester/amide alkyl quaternary amine according to the above general structures. In the preferred embodiment of the present invention, R1 is saturated or unsaturated, straight or branched alkyl group with 10 to 24 C atoms, more preferably 12 to 22 C atoms and R2 is straight or branched alkyl group with 1 to 4 C atoms, A, B, R3 to R7 are same as above. Non-limiting suitable examples are stearyloxypropyl amine, palmityloxypropyl amine, stearyloxypropyldimethyl amine, stearyloxypropyldiethyl amine, stearyloxyethylyldimethyl amine, stearyloxyethyl amine, myristyloxypropyl amine, myristyloxypropyldimethyl amine, palmitamidopropyl amine, palmitamidopropyl methylamine, palmitamidopropyl diethylamine, palmitamidopropyl dibutylamine, palmitamidopropyl buylamine, palmitamidopropyl dipropylamine, palmitamidopropyl propylamine, palmitamidopropyl dihydroxyethylamine, palmitamidopropyl hydroxyethylamine, palmitamidopropyl dihydroxypropylamine, palmitamidopropyl hydroxypropylamine, lauramidopropyl amine, lauramidopropyl methylamine, lauramidopropyl diethylamine, lauramidopropyl dibutylamine, lauramidopropyl buylamine, lauramidopropyl dipropylamine, lauramidopropyl propylamine, lauramidopropyl dihydroxyethylamine, lauramidopropyl hydroxyethylamine, lauramidopropyl dihydroxypropylamine, lauramidopropyl hydroxypropylamine, stearamidopropyl amine, stearamidopropyl methylamine, stearamidopropyl diethylamine, stearamidopropyl dibutylamine, stearamidopropyl butylamine, stearamidopropyl dipropylamine, behenamidopropyl propylamine, behenamidopropyl dihydroxyethylamine, behenamidopropyl hydroxyethylamine, behenamidopropyl dihydroxypropylamine, behenamidopropyl hydroxypropylamine, behenamidopropyl amine, behenamidopropyl methylamine, behenamidopropyl diethylamine, behenamidopropyl dibutylamine, behenamidopropyl butylamine, behenamidopropyl dipropylamine, behenamidopropyl propylamine, behenamidopropyl dihydroxyethylamine, behenamidopropyl hydroxyethylamine, behenamidopropyl dihydroxypropylamine, behenamidopropyl hydroxypropylamine, dipalmitamidopropyl methylamine, dipalmitamidopropyl ethylamine, dipalmitamidopropyl butylamine, dipalmitamidopropyl propylamine, dipalmitamidopropyl hydroxyethylamine, dipalmitamidopropyl hydroxypropylamine, dilauramidopropyl amine, dilauramidopropyl methylamine, dilauramidopropyl buylamine, dilauramidopropyl hydroxyethylamine, dilauramidopropyl hydroxypropylamine, distearamidopropyl amine, distearamidopropyl methylamine, dibehenamidopropyl propylamine, dibehenamidopropyl hydroxyethylamine, palmitoamidopropyl trimethyl ammonium chloride, stearamidopropyl trimethylammonium chloride, behenamidopropyl tri hydroxyethalmonium chloride, distearylamidopropyl dimethyl ammonium chloride, dicetylamidodihydroxyethyl ammonium chloride, palmitoylpropyl amine, palmitoylpropyl methylamine, palmitoylpropyl diethylamine, palmitoylpropyl dibutylamine, palmitoylpropyl buylamine, palmitoylpropyl dipropylamine, palmitoylpropyl propylamine, palmitoylpropyl dihydroxyethylamine, palmitoylpropyl hydroxyethylamine, palmitoylpropyl dihydroxypropylamine, palmitoylpropyl hydroxypropylamine, myristoylpropyl amine, myristoylpropyl methylamine, myristoylpropyl diethylamine, myristoylpropyl dibutylamine, myristoylpropyl buylamine, myristoylpropyl dipropylamine, myristoylpropyl propylamine, myristoylpropyl dihydroxyethylamine, myristoylpropyl hydroxyethylamine, myristoylpropyl dihydroxypropylamine, myristoylpropyl hydroxypropylamine, stearoylpropyl amine, stearoylpropyl methylamine, stearoylpropyl diethylamine, stearoylpropyl dibutylamine, stearoylpropyl butylamine, stearoylpropyl dipropylamine, behenoylpropyl propylamine, behenoylpropyl dihydroxyethylamine, behenoylpropyl hydroxyethylamine, behenoylpropyl dihydroxypropylamine, behenoylpropyl hydroxypropylamine, behenoylpropyl amine, behenoylpropyl methylamine, behenoylpropyl diethylamine, behenoylpropyl dibutylamine, behenoylpropyl butylamine, behenoylpropyl dipropylamine, behenoylpropyl propylamine, behenoylpropyl dihydroxyethylamine, behenoylpropyl hydroxyethylamine, behenoylpropyl dihydroxypropylamine, behenoylpropyl hydroxypropylamine, dipalmitoylpropyl methylamine, dipalmitoylpropyl ethylamine, dipalmitylpropyl butylamine, dipalmitylpropyl propylamine, dipalmitylpropyl hydroxyethylamine, dipalmitylpropyl hydroxypropylamine, dilauroylpropyl amine, dilauroylpropyl methylamine, dilauroylpropyl buylamine, dilauroylpropyl hydroxyethylamine, dilauroylpropyl hydroxypropylamine, distearylpropyl amine, distearylpropyl methylamine, dibehenylpropyl propylamine, dibehenylpropyl hydroxyethylamine, palmitylpropyl trimethyl ammonium chloride, stearylpropyl trimethylammonium chloride, behenylpropyl tri hydroxyethalmonium chloride, distearylpropyl dimethyl ammonium chloride, dicetyldihydroxyethyl ammonium chloride, dioleoylethylhydroxyethylmonium methosulfate, and dicocoylethylhydroxyethylmonium methosulfate.
Concentration of at least one alkyl ester/amide alkyl amine or alkyl ester/amide alkyl quaternary amine according to the above general structure is in the range of 0.01 to 5%, preferably 0.02 to 4%, more preferably 0.05 to 3% and most preferably 0.1 to 2.5% and in particular 0.2 to 2% by weight calculated to total composition.
The permanent shaping compositions according to the invention comprise at least one reducing compound at a concentration of at least 0.5% by weight calculated to total composition. Preferred are thioglycolic acid and thiolactic acid as well as the salts thereof, in particular the ammonium and ethanolamine salts. Further useful thio compounds are in particular cysteine or the hydrochloride thereof, homocysteine, cysteamine, N-acetyl cysteine, thioglycerol, ethanediol monothioglycolate, 1.2-propyleneglycol monothioglycolate (see also WO-A 93/1791), 1-3-propanediol monothioglycolate or the isomer mixture resulting thereof, 1.3-butanediol and 1.4-butanediol monothioglycolate and the isomer mixtures thereof, polyethylene glycol, such as di-, tri- and tetraethyleneglycol monothioglycolates, glycerol monothiolactate and further thio acids and the esters thereof, as well as mixtures thereof.
The use of inorganic reducing sulfur compounds such as sodium hydrogen sulfite is basically also possible.
The total reduction agent content in the compositions according to the invention customarily amounts from 0.5 to 15%, preferably 2.0 to 12.5% by weight, calculated to total composition as free thioglycolic acid as reference substance.
The permanent shaping compositions containing reducing agents can, if necessary, comprise alkalizing agents. Their quantity is dependent on the reducing agent and the desired pH-value of the composition. Reducing agent compositions preferably contain 0.1% to 5%, in particular 0.5% to 2.5% by weight thereof, calculated to the total composition. Alkalizing agents preferred within the scope of the invention are ammonium carbamate, ammonia and/or ammonium(bi)carbonate, monoethanolamine and triethanolamine. It is desirable to adjust the pH-value between about 6.5 and 10.5, preferably about 7 to 9.5.
The permanent shaping compositions according to the invention are suited for use both for the permanent waving, i.e. curling of human hair and for the straightening, i.e. smoothing thereof.
The viscosity best suited for the permanent shaping compositions according to the invention proved to be in the range of 1 to 10,000 mPa·s, preferably about 1 to about 5,000 mPa·s, measured at 20° C. in a Brookfield viscosimeter (no. 5 spindle), whereas the viscosity suited for the straightening compositions is preferably higher in a range up to 50,000 mPa·s, preferably up to 30,000 mPa·s measured at 20° C. in a Brookfield viscosimeter (no. 5 spindle).
The viscosity is adjusted by addition of the appropriate amounts of thickening agents known per se, such as cellulose derivatives. Thickening may as well be realized by formulating a composition in form of an emulsion with the use of C10-C22-fatty alcohols, in mixture with long mono alkyl chain quaternary ammonium surfactants.
The permanent shaping compositions according to the present invention preferably comprise surfactants selected from anionic, nonionic, cationic and amphoteric ones. Their proportion ranges from 0.05% to 10%, in particular from 0.1% to 5% by weight, calculated to total composition.
Suitable anionic surfactants are especially the known alkyl ether sulfates and carboxylic acids, in particular in form of their alkali salts, as well as protein fatty acid condensates.
Suitable nonionic surfactants, which are preferred within the scope of the invention, are in particular C8-C18-fatty alcohol polyglycol ethers, fatty acid polyglycol esters, fatty acid alkanolamides, amineoxides, and especially C8-C18-alkyl polyglucosides.
Also possible is the incorporation of amphoteric surfactants, such as the known alkyl betaines, alkyl amido betaines, and alkyl amphoacetates.
Further according to a further preferred embodiment, permanent shaping compositions comprise additionally at least one cationic surfactant according to general formula
where R8 is a saturated or unsaturated, branched or non-branched alkyl chain with 8-24 C atoms R9 is a hydrogen, saturated or unsaturated, branched or non-branched alkyl chain with 1-24 C atoms and R10 and R11 are independent from each other H or lower alkyl chain with 1 to 4 carbon atoms which may be substituted with one or two hydroxyl group, and X is chloride, bromide or methosulfate.
Concentration of cationic surfactant is in the range from 0.05% to 5%, preferably 0.1% to 2.5% by weight, calculated to total composition.
Non-limiting suitable long-chain quaternary ammonium compounds are in particular cetyl trimethyl ammonium chloride, dimethyl dicetyl ammonium chloride, trimethyl cetyl ammonium bromide, stearyl trimethyl ammonium chloride, dimethyl stearyl hydroxyethyl ammonium chloride, lauryl trimethyl ammonium chloride etc.
Further permanent shaping compositions of the present invention may comprise additional cationic polymer. Basically suitable are all cationic polymers listed under the generic name “Polyquaternium” in the CTFA International Cosmetic Ingredient Dictionary. Examples are Polyquaternium 2, Polyquaternium 4, Polyquaternium 5, Polyquaternium 6, Polyquaternium 7, Polyquaternium 10, Polyquaternium 11, Polyquaternium 16, Polyquaternium 22, Polyquaternium 28, Polyquaternium 39 and Polyquaternium 87.
The cationic polymers also include the quaternized products of graft polymers from organopolysiloxanes and polyethyl oxazolines described in EP-A 524 612 and EP-A 640 643. Such polymer is known with its CTFA name Polysilicone-9.
Concentration of one or more additional cationic polymers is in the range from 0.05% to 2.5%, preferably 0.1% to 1.5% by weight, calculated to total composition.
Permanent shaping compositions of present invention can comprise additionally at least one organic solvent. Suitable organic solvents are 2-methyl-1,3-propanediol, mono and dialcohols or the ethers thereof, in particular mono-C1-C3-alkyl ether, ethanol, n-propanol, isopropyl alcohol, 1-methoxypropanol, 1-ethoxypropanol and ethoxydiglycol, diols and their esters 1,3- and 1,4-butanediol, diethyleneglycol and the monomethyl and monoethyl ether thereof, dipropylene glycol and the monomethyl and monoethyl ether thereof, glycerol, hexanetriol, ethyl carbitol, benzyl alcohol, benzyloxy ethanol, propylene carbonate, N-alkyl pyrrolidone, and urea or their mixture preferably in an amount from about 0.1% to 10% by weight, calculated to the total composition.
Permanent shaping composition of the present invention can comprise further ceramide type of compound such as cetyl-PG-hydroxyethylpalmitamide.
Further optional ingredient are sterols, especially the phytosterols as preferred hair restructuring agents. Especially preferred ones are of plant origin for example ergosterol, sitosterol, stigmasterol, fucosterol, brassicasterol, fungisterol, campesterol, zymosterol, ascosterol, cerevisterol, episterol, faecosterol, spinasterol. Among those phytosterols, the ones found in “Avocadin” which is the unsaponified fraction of the avocado oil is more preferred.
Optionally fatty acids of C10 to C22 may be incorporated into the compositions of the present invention at a concentration of preferably 0.01 to 2.5% by weight calculated to total composition.
Another preferred compound in the permanent shaping composition of the present invention is silicone compounds and especially aminated silicones such as amodimethicone available from for example Dow Corning under the brand names Dow Corning 949 Emulsion and Dow Corning 2-8194. Concentration of silicones, especially amodimethicone, is in the range of 0.05 to 2.5%, preferably 0.1 to 1% by weight calculated to total composition.
Additionally, one or more natural oil component may be incorporated into the compositions of the present invention. Suitable are such as olive oil, almond oil, avocado oil, wheatgerm oil, ricinus oil or their mixture. Concentration of these natural oil ingredients should be 0.01 to 2.5%, preferably 0.01. to 1%, more preferably 0.05 to 0.5% by weight, calculated to total composition.
Further additional compounds may be present in the permanent shaping compositions of the present invention is ubichinone of the formula
where n is a number between 1 and 10. Preferred ubichinones are the ones where n is a number between 6 and 10 and especially preferred is Ubichinone 50 where n is 10, also known as Coenzyme Q10. Concentration ubichinone of the above formula in permanent shaping compositions of the present invention is from 0.0001 to 1%, preferably from 0.0002 to 0.75%, more preferably from 0.0002 to 0.5% and most preferably from 0.0005 to 0.5% by weight, calculated to total composition.
In another preferred embodiment of the present invention, composition comprises one or more fatty alcohol with a chain length of 12 to 24 C atoms. Concentration of one or more fatty alcohol is in the range of 1 to 15%, preferably 1 to 10%, more preferably 2 to 7.5 and most preferably 2 to 5% by weight calculated to total composition.
Suitable non limiting examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol cetearyl alcohol, behenyl alcohol and their mixtures. Preferred are cetyl alcohol, stearyl alcohol cetearyl alcohol, behenyl alcohol and their mixtures. Particularly preferred are cetyl alcohol, stearyl alcohol and their 1 to 1, by weight, mixture cetearyl alcohol.
The compositions used according to the invention can naturally comprise all the substances customarily found in permanent shaping compositions, a list of which will not be given here, and are preferably present as solutions, gels with a higher or lower viscosity, emulsions or creams. They can be single-phase products or compositions packed into separate packaging which are united upon application, as they are disclosed, for example, in DE-C 43 04 828.
In order to avoid repetition, reference is here made to the state of the art as it is described, for example, in “Ullmann's Encyclopedia of Industrial Chemistry”, Vol. A12 (1986), pages 588 to 591, and in particular to the monography of K. Schrader, “Grundlagen and Rezepturen der Kosmetika”, 2nd. Ed. (1989, Hüthig Buchverlag) pages 823 to 840, as well as the article by D. Hollenberg et. al. in “Seifen-Öle-Fette-Wachse”, 117 (1991), pages 81 to 87.
Composition of the present invention is used in a process for permanent waving wherein hair is washed or shampooed first and wound on the curlers, subsequently a reducing agent composition comprising at least one reducing agent, an aqueous emulsion of a high viscosity silicone copolymer disclosed above and at least one alkyl ether or ester or amide alkyl amine or quaternary ammonium compound according to general structures given above is applied onto hair and after 1 to 30 min, preferably 1 to 20 min of processing time, depending on the hair strength, rinsed off from hair with tap water and an oxidizing composition comprising at least one oxidizing agent, preferably hydrogen peroxide or sodium bromate at a concentration of 0.5 to 10% by weight calculated to total of oxidizing composition, is applied onto hair and left on the hair 1 to 20 min and rinsed off and curlers removed from hair. In cases where additional conditioning composition is required this may as well be applied after finishing the process as described above.
In another process as described above the curlers are removed after rinsing off the reducing agent and before applying the oxidizing agent.
Further in another process, after rinsing off the reducing agent from hair, an intermediate treatment composition is applied onto hair, and without rinsing off but after removing the excess amount of intermediate treatment with a towel, oxidizing composition is applied and at the end of the processing they are rinsed off from hair and curlers are removed from hair.
It has further been found out that the use of an aqueous emulsion of a high viscosity silicone copolymer and at least one amine/quaternary ammonium compound according to above given general structure in the intermediate treatment composition improves the permanent shaping of hair as well in terms of curl appearance and natural look and feel of hair. Therefore, in another preferred form of the present invention, permanent shaping of hair is carried our with a process wherein hair is washed or shampooed first and subsequently a reducing agent comprising composition is applied onto hair and after 1 to 45 min, preferably 1 to 30 min of processing time, depending on the hair strength, rinsed off from hair with tap water and an intermediate treatment composition comprising an aqueous emulsion of a high viscosity silicone copolymer and at least one alkyl ether or ester or amine alkyl amine or quaternary ammonium compound according to above given general structure is applied and without rinsing off an oxidizing composition comprising at least one oxidizing agent, preferably hydrogen peroxide or sodium bromate at a concentration of 0.5 to 10% by weight calculated to total of oxidizing composition, is applied onto hair and left on the hair 1 to 20 min and rinsed off. In cases where additional conditioning composition is required this may as well be applied after finishing the above process. In case of permanent waving hair in the above process curlers are put onto hair before application of reducing composition and taken off from hair before application of oxidizing composition or after application and processing of the oxidizing composition.
The intermediate treatment composition has a pH value between 2.5 to 6, preferably 3 to 5.5 and most preferably 3 to 5.
A straightening process may also be carried out in a different process wherein hair is washed and/or shampooed and dried and reducing composition comprising at least one reducing compound, an aqueous emulsion of a high viscosity silicone copolymer and at least one alkyl ether or ester or amine alkyl amine or quaternary ammonium compound according to above given general structure is applied onto dry hair and processed for 5 to 60 min, preferably 5 to 45 min and rinsed off with water and dried and the dry hair physically straighten with hot iron at a temperature of 130 to 210° C. and subsequently an oxidizing composition comprising at least one oxidizing agent, preferably hydrogen peroxide or sodium bromate at a concentration of 0.5 to 10% by weight calculated to total of oxidizing composition, is applied onto hair and left on the hair 1 to 20 min and rinsed off.
The following examples are to illustrate the invention, but not to limit it.
With this composition the hair was permanently waved for about 15 minutes, rinsed and neutralized for about 8 minutes with a customary 2.5% H202 composition. Homogeneous wave appearance was obtained. Exclusion of Dow Corning HMW 2220 and stearamidopropyl dimethyl amine resulted in less homogeneous perm appearance.
With this composition the hair was permanently waved for about 18 minutes, rinsed and neutralized for about 10 minutes with a customary 2.5% H202 composition.
Homogeneous wave appearance was obtained. Exclusion of Dow Corning HMW 2220 stearamidopropyltrimonium methosulfate resulted in less homogeneous perm appearance.
The permanent wave achieved with this composition was similar to the one obtained with the composition according to Example 1.
Exclusion of the Dow Corning HMW 2220 and stearoylpropyltrimonium chloride led to waves with substantially weaker contours.
The permanent wave achieved with this composition was similar to the one obtained with the composition according to Example 1.
Exclusion of the Dow Corning HMW 2220 and palmitamidopropyl trimonium chloride led to substantially weaker waves.
A permanent waving product consisting of two Compositions A and B, filled into a two-chamber packaging the chambers of which were kept separate until application, was prepared by destruction of the separating wall and applied onto human hair rolled onto curlers. The hair was rinsed after about fifteen minutes processing and neutralized for about five minutes with a 2.5% H2O2 neutralizer composition, rinsed again, shampooed and dried.
An expressive, even, intensive permanent wave was obtained.
An identical treatment which had no Dow Corning HMW 2220 and palmitamidopropyl trimonium chloride showed a visibly inferior wave.
After mixing of both Compositions a ready-to-use product with a pH-value of 7.4 was obtained.
A permanent waving product filled into a two-chamber package was prepared in analogy to Example 4:
A product with a pH-value of 7.4 was obtained by mixing of the Compositions immediately prior to application. After application onto dyed hair as described in Example 3, this mixture resulted in an expressive permanent wave. Hair was soft and smooth and curls had their natural like elasticity and bounce.
The above composition had a pH of 4.10.
Hair was waved according to the process as follows: Hair was shampooed and towel dried and put on curlers. Alkaline permanent waving gel of above was applied and processed for 20 min at approximately 40° C. and rinsed off with water and towel dried. Subsequently, intermediate treatment composition was applied and processed for 10 min and the hair was neutralized for about five minutes with a 2.5% H2O2 neutralizer composition, rinsed again, shampooed and dried.
This composition constitutes an effecting smoothing composition for kinky hair.
| Number | Date | Country | Kind |
|---|---|---|---|
| 08018288.4 | Oct 2008 | EP | regional |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP09/07502 | 10/20/2009 | WO | 00 | 4/13/2011 |
