Hair tinting shampoo

Abstract: A tinting shampoo with an efficient and gentle cleansing effect and improved colour absorption which contains at least one direct dyestuff in a water-based surfactant mixture comprising at least an anion-active surfactant in a proportion of about 5 to 35% by weight, especially a mixture of sulphosuccinate and a lauroyl sarcosinate, 0.5 to 10% by weight of a surface-active amine oxide, and about 2.5 to about 15% by weight of an alkyl polyglycoside, and, optionally, about 0.5 to about 10% by weight of an amphoteric surfactant and (or) about 0.5 to about 5% by weight of a further non-ionic surfactant.

Description: The present invention refers to a colouring shampoo which not only provides thorough and gentle cleansing of the hair but also shows an excellent tinting effect. Shampoos with colouring properties, so-called tinting shampoos, have been known for a long time. Normally, they consist of a surfactant base and one or more direct dyes included therein. Examples of those tinting shampoos may be found in cosmetic monographies, e.g. K.Schrader, Grundlagen und Rezepturen der Kosmetika, 2nd Ed. (Huethig Buchverlag Heidelberg, 1989), pp.805 to 806, and p.814. These colouring shampoos are affected by the disadvantage that hair colorations achieved by them are often not sufficiently intense and, therefore, fade or even disappear completely after relatively few shampoo treatments. Hence the invention starts from the problem to create a composition for a colouring shampoo which does not show these disadvantages, i.e. which not only cleanses the hair thoroughly and gently, but also allows the direct dyestuff to be absorbed of such kind to achieve an improved and lasting colour intensity. The solution of this problem is to use a colouring shampoo comprising at least one direct hair dyestuff and being present in a surfactant mixture on an aqueous base, whereby the base contains a surfactant mixture of the following compositon: 5 to 35% by weight of an anionic surfactant; 0.5 to 10% by weight of a surface-active amine oxide; 2.5 to 15% by weight of an alkyl polyglycoside of the general formula RO (R¹O) t Z x , where Z represents a reducing saccharide residue with 5 to 6 carbon atoms, R an alkyl group from 8 to 18 carbon atoms, R¹ an ethylene or propylene residue, t a number from zero to ten and x one to five, and, optionally, 0.5 to 5% by weight of another nonionic surfactant, and (or) about 0.5 to 10% by weight of an amphoteric surfactant. The above percentages each refer to the total composition of the tinting shampoo. EP-A 137 178 already discloses colouring shampoos containing, in addition to a direct dyestuff, an anionic surfactant and an "auxiliary surfactant" which should be a cationic and/or a betaine surfactant. However, these compositions, too, are not entirely satisfactory in respect of optimal colour lustre and colour depth imparted to the hair. Another problem has been set in EP-A 367 926, again describing hair dyeing or hair tinting products on the basis of at least one direct dyestuff in a base mixture of surfactants and usual additives, whereby this base mixture contains 2.5 to 20% by weight of at least one amphoteric surfactant, 1 to 10% by weight of at least one surface active amine oxide, and 1 to 10% by weight of at least one non-ionic surfactant. It is not possible to draw any conclusions as to a solution of the problem of the invention from the publication mentioned above, especially because this publication clearly states that anionic surfactants, particularly fatty alcohol ether sulphates, should only be used in minor quantities, if at all. Finally, from EP-A 46 543 preparations are known which simultaneously colour, wash and condition the hair. However, these products obligatorily include oxidation dyes, whereagainst this invention is primarily related to direct dyestuffs. In addition, the shampoo basis composition used in this EP-A is fundamentally different in its surfactant composition from the surfactant composition used in the present invention. Anionic surfactants suitable within the scope of the invention are especially alkali salts of sulphosuccinic acid semi-esters, and particularly the disodium salt of the monooctylsulphosuccinate and alkali salts of long-chain monoalkyl ethoxy sulphocuccinates. An additionally preferred category of anionic surfactants are long-chain acyl sarcosinates or their alkali salts, e.g. sodium lauroylsarcosinate. As already mentioned, the proportion of anionic surfactants in the compositions of the invention is about 5 to about 35% by weight, based on the total composition of the colouring shampoo. A preferred range thereby is about 8 to about 25, and preferably 10 to 20% by weight of anion-active surfactant. A preferred surfactant mixture is composed of an alkali salt of a sulphosuccinate, e.g. disodium laurylether sulphosuccinate, and an acylamino carboxylic acid salt, e.g. sodium lauroyl sarcosinate, preferably in a weight proportion of about 5:1 to 2:1, and particularly 3 to 4:1. In the place of or in supplement to the preferably used anionic surfactants, as mentioned above, further anion-active surfactants may be used, e.g. the known C₁₀-C₁₈ alkylether sulphates, especially the C₁₂-C₁₄ alkylether sulphates or laurylether sulphate, particularly those containing one to four ethylene oxide groups per mol. Further suitable anion-active surfactants are fatty alcohol sulphates, e.g. laurylsulphate, monoglyceride sulphates, fatty acid amide sulphates produced by ethoxylation and following sulphation of fatty acid monoalkanolamides, alkylether carboxylic acids and alkali salts of long-chain alkylphosphates which are also mild and especially skin-compatible detergents. In admixture with other anionic surfactants, well-known protein-fatty acid-condensation products may also be used. A survey of anion-active surfactants employed in shampoos is, e.g., given in the monography of K.Schrader, l.c., pp.683 to 691. A further component of the composition of the invention is a surface-active amine oxide in a proportion of about 0.5 to about 10% by weight, preferably 1 to 5, and particularly 1.5 to 3% by weight of the total composition. Suitable amine oxides are e.g. C₁₂-C₁₈ alkyl dimethyl amine oxides, e.g. lauryl dimethyl amine oxide or coco-di(hydroxyethyl)amine oxide. The long-chain alkyl residue may also be substituted by amide groups, such as a C₇-C₁₇ alkanoylamino-3-dimethyl amino propane-3-N-oxide. Polyoxyethylated amine oxides, too, are suitable, as well as amine oxides of the type diethylaminopropyl palmitamide-N-oxide, etc.. Finally, the compositions of the invention comprise 2.5 to 15% by weight of an alkylpolyglycoside of the general formula RO(R¹O) t Z x , where Z represents a reducing saccharide residue with 5 to 6 carbon atoms, R an alkyl group from 8 to 18 carbon atoms, R¹ an ethylene or propylene residue, t a number between zero and ten and x a number between one and five. The preferred proportion is between 5 and 10% by weight of the total composition. Mixtures of anion-active surfactants and alkylpolyglycosides and their use in hair shampoos are already common knowledge, e.g. from EP-A 70 074. The alkyl polyglycosides described therein are principally suitable as well within the scope of the present invention; however, this invention uses, as a specially preferred alkyl polyglycoside, a material with approx.9 to 11 carbon atoms in the alkyl chain and a condensation degree of less than 1.4, preferably 1.35. Mixtures of sulphosuccinates with alkyl polyglycosides are already known as well from EP-A 358 216; the mixtures described therein are also excellently suitable for use in the compositions of the present invention. In a preferred embodiment, the compositions of this invention also contain 0.5 to 10, preferably 1 to 5% by weight calculated to the total composition, of one or more amphoteric surfactants. The various known betaines like fatty acid amido alkylbetaines, long-chain alkyl aminopropionates as well as preferably sulphobetaines are suitable as such. A particularly suitable betaine in this respect is laurylhydroxysulphobetaine. Schrader, l.c., pp. 598 to 600, also describes amphoteric surfactants suitable for shampoos. Furtheron, preferred optional ingredients of the composition of this invention are additional nonionic surfactants, preferably in a proportion of approx.0.5 to approx. 5.0%, especially 1 to 3% by weight calculated to the total composition. Such nonionic surfactants are, e.g., the various sorbitol esters, for example, polyethylene glycol sorbitan stearic acid ester such as polyoxyethylene sorbitan monostearate with 20 to 60 ethylene oxide units, fatty acid polyglycolesters or fatty acid glyceride oxyethylate, fatty alcohol polyglycolether and also mixed condensates from ethylene oxide and propylene oxide, as they are, e.g., available under the trade name "Pluronic". As additional nonionic surfactant ingredients, the colouring shampoos of the invention may contain, e.g., long-chain fatty acid monoalkanolamides and dialkanolamides, for example, coconut fatty acid monoethanolamide or myristic fatty acid diethanolamide. The proportion of these alkanolamides is preferable between about 0.2 and 2.5, especially 0.5 and 2% by weight of the total composition. Such mixtures of alkylpolyglycosides with fatty acid alkanolamides are, e.g. the object of EP-A 70 076. Hair colouring shampoos of this invention may, of course, include all other substances which are usually employed in those products. As such shall be mentioned: complexing agents, further dyestuffs to tint the shampoo itself, preservatives, pH regulators, viscosity regulators such as inorganic salts, as far as they are not anyhow part of the surfactant composition, fragrances, agents to give pearly lustre, thickeners, etc. A list of those additional substances is , e.g., disclosed by Schrader, l.c., pp.695 to 722. Additional useful additives are hair conditioning substances. As such particularly cationic polymers are used, preferably in a proportion between 0.1 to 1.5, especially 0.25 to 1.0% by weight of the total composition. From EP-A 337 354, the use of cationic polymers in alkylpolysaccharide surfactant preparations is already known; the cationic polymers listed therein on pp.3 to 7 are also suitable as conditioning additives in the compositions of this invention. Additional hair conditioning additives are the well-known protein hydrolyzates, e.g. in a proportion of 0.25 to 5% by weight, preferably 0.5 to 2.5% by weight of the total composition. Moreover, water-soluble collagen or water-soluble collagen derivatives are suitable. Finally, as already known, too, the various polysiloxanes may be used additionally as conditioning agents in the hair colouring shampoo of this invention. The preferred proportion thereof is between approx.0.5 and approx.7.5, especially 1 to 5% by weight of the total composition. Suitable are high volatile as well as less volatile cyclic or linear polysiloxanes, e.g. silicone oils known by their common names "dimethicone" or "phenyldimethicone" and (or) "cyclomethicone". Naturally, an essential part of the hair colouring shampoos of the invention are direct dyestuffs. Their selection and concentration, of course, is depending on the desired colour shade, because of which the following list may only be taken as an example: Specially suitable are the so-called "Arianor" dyestuffs such as Basic Brown 17, Colour Index No.12, 251; Basic Brown 16, C.I.No.12,250; Basic Red 76, C.I.No.12,245; Basic Yellow 57, C.I.No.12,719; Basic Blue 99, C.I.No.56,059; Basic Violet, C.I.No.45,170 or Basic Violet 1, C.I.No. 42,535 and Basic Violet 3, C.I.No.42,555; Acid Yellow 1, C.I.No.10,316; Acid Yellow 9, C.I.No. 13,015; Disperse Yellow 3, C.I.No.11,855; and Disperse Yellow 1, C.I.No. 10,345. Direct hair dyes are also listed at Schrader, l.c., pp.800 to 805. Of course natural direct dyestuffs, such as henna, may be used additionally. The following examples give an illustration of the invention: Example 1 The application of this colouring shampoo produces a significant, lasting red shade on the hair. Example 2 After washing the hair with this colouring shampoo, a bright light blonde tone is achieved.

Claims: Hair tinting shampoo comprising at least one direct dyestuff in a water based surfactant mixture, characterized in that this surfactant mixture comprises the following composition: a) 5 to 35% by weight of at least one anionic surfactant; b) 0.5 to 10% by weight of a surface-active amine oxide; c) 2.5 to 15% by weight of an alkyl polyglycoside of the general formula RO(R¹O) t Z x , wherein Z denotes a reducing saccharide residue containing 5 to 6 carbon atoms, R denotes an alkyl group containing 8 to 18 carbon atoms, R¹ denotes an ethylene or propylene residue, t denotes a figure between zero and 10 and x denotes a figure between one and five. Tinting shampoo according to claim 1, comprising as an anionic surfactant, a mixture of 8 to 20% by weight, calculated to the total composition, of an alkali salt of a sulphosuccinic acid semi-ester and an alkali salt of a N-C₁₂-C₁₈ acylsarcosinate in a proportion of 2:1 to 5:1 by weight. Tinting shampoo according to one of claims 1 or 2, comprising as alkyl polyglycoside a C₉-C₁₁ alkyl polyglycoside having a condensation degree (x) of less than 1.4. Tinting shampoo according to one or more of claims 1 to 3, comprising an amphoteric surfactant in a proportion of 0.5 to 10% by weight, calculated to the total composition. Tinting shampoo according to claim 4, comprising 1.5 to 5% by weight of lauryl hydroxy sulphobetaine. Tinting shampoo according to one or more or the preceding claims, comprising a further non-ionic surfactant in a proportion of 0.5 to 5% by weight of the total composition. Tinting shampoo according to claim 6, comprising a polyoxyethylene sorbitan monoester in a proportion of 1 to 2.5% by weight, calculated to the total composition.

Inventors: NOMURA TADASHI DR, ONITSUKA SATOSHI, NOMURA, TADASHI, DR., ONITSUKA, SATOSHI
Applicants: KAO CORP, KAO CORPORATION
Application year: 1992
Main classification: A61K7
IPC codes: A61K8, C11D3, A61Q5