Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2000-06-13
2003-06-03
Douyon, Lorna M. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S435000, C008S552000
Reexamination Certificate
active
06572663
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a method for the cold-production of hair coloring preparations, preferably coloring creams, in which surface-active fatty alcohol dispersions are used.
For the production of hair coloring preparations, such as, for example, creams of the oil-in-water type, fatty alcohols are normally used to adjust the viscosity. The emulsions are prepared here by the hot-method, i.e. the constituents are mixed above the melting point of the highest-boiling component and then slowly cooled with intensive homogenization. For reasons of efficiency, however, it is desirable to prepare such preparations by a cold method, for example using known PIT or microemulsion technology. However, in this connection, a problem arises inasmuch as adjustment of high viscosities is possible only with very great difficulty, particularly when lamellar gels are prepared using fatty alcohols.
Consequently, the object of the invention was to provide a method for the cold-production of hair coloring preparations, in particular creams of the O/W type, which can also be used to produce lamellar gels having particularly good storage stability.
2. Description of the Invention
The invention provides a method for producing hair coloring preparations with improved viscosity, in which aqueous surface-active fatty alcohol dispersions are stirred up with oil components and hair dyes in the cold.
Surprisingly, we have found that it is also possible to prepare O/W cream preparations for the coloring of hair by a cold method if surface-active fatty alcohol dispersions, preferably fatty alcohol microdispersions, are used to adjust the consistency. The resulting compositions are in the form of lamellar gels which are notable for particularly high stability, even during storage above room temperature.
Fatty Alcohols
The dispersions to be used for the purposes of the method according to the invention may comprise fatty alcohols of the formula (I)
R
1
OH (I)
in which R
1
is a linear or branched, saturated or unsaturated alkyl radical having 6 to 30 carbon atoms. Typical examples are caproic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolyl alcohol, linolenyl alcohol, elaeostearyl alcohol, arachidyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol, and technical-grade mixtures thereof, which are produced, for example, during the high-pressure hydrogenation of technical-grade methyl esters based on fats or oils or aldehydes from the Roelen oxo synthesis, and as monomer fraction during the dimerization of unsaturated fatty alcohols. Preference is given to technical-grade fatty alcohols having 12 to 18 carbon atoms, such as, for example, coconut, palm, palm kernel, cetearyl or tallow fatty alcohol. The proportion of fatty alcohols in the dispersions can here be 5 to 50% by weight and preferably 25 to 40% by weight.
Surfactants
The fatty alcohol dispersions to be used for the purposes of the method according to the invention may comprise anionic, nonionic, cationic and/or amphoteric or zwitterionic surfactants. Typical examples of anionic surfactants are soaps, alkylbenzenesulfonates, alkanesulfonates, olefinsulfonates, alkyl ether sulfonates, glycerol ether sulfonates, &agr;-methyl ester sulfonates, sulfofatty acids, alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, fatty acid ester sulfates, in particular lauric acid+1EO sulfate, hydroxy mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide (ether) sulfates, mono- and dialkyl sulfosuccinates, mono- and dialkyl sulfosuccinamates, sulfotriglycerides, amide soaps, ether carboxylic acids and salts thereof, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, N-acylamino acids, such as, for example, acyl lactylates, acyl tartrates, acyl glutamates and acyl aspartates, alkyl oligoglucoside sulfates, protein fatty acid condensates (in particular vegetable products based on wheat) and alkyl (ether) phosphates. If the anionic surfactants comprise polyglycol ether chains, these can have a conventional homolog distribution, but preferably have a narrowed homolog distribution. Typical examples of nonionic surfactants are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, mixed ethers and mixed formals, optionally partially oxidized alk(en)yl oligoglycosides and glucuronic acid derivatives, fatty acid N-alkylglucamides, protein hydrolyzates (in particular vegetable products based on wheat), polyol fatty acid esters, sugar esters, sorbitan esters, polysorbates and amine oxides. If the nonionic surfactants comprise polyglycol ether chains, then these can have a conventional homolog distribution, but preferably have a narrowed homolog distribution. Typical examples of cationic surfactants are quaternary ammonium compounds and ester quats, in particular quaternized fatty acid trialkanolamine ester salts. Typical examples of amphoteric or zwitterionic surfactants are alkylbetaines, alkylamidobetaines, aminopropionates, aminoglycinates, imidazoliniumbetaines and sulfobetaines. Said surfactants are exclusively known compounds. With regard to structure and preparation of these substances, reference may be made to relevant review articles, for example, J. Falbe (ed.), “Surfactants in Consumer Products”, Springer Verlag, Berlin, 1987, pp. 54-124 or J. Falbe (ed.), “Katalysatoren, Tenside und Mineröladditive” [Catalysts, Surfactants and Mineral Oil Additives], Thieme Verlag, Stuttgart, 1978, pp. 123-217. The proportion of surfactants in the fatty alcohol dispersions can be 0.1 to 10% by weight and preferably 0.5 to 5% by weight.
Fatty Alcohol Dispersions
The fatty alcohol dispersions can be prepared, for example, by the microdispersion method. Microdispersions are optically isotropic, thermodynamically stable systems which comprise a water-insoluble oil component (here: fatty alcohol), dispersants—preferably alkyl glucosides—and water. The clear or transparent appearance of the microdispersions is a consequence of the small particle size of the dispersed emulsion droplets. In this connection, it has been found that fatty alcohol microdispersions have a particularly advantageous effect on the production and storage stability of the resulting coloring preparations. Preference is given to using dispersions which have a particle size of less than 50 &mgr;m, in particular of less than 20 &mgr;m and particularly preferably less than 10 &mgr;m. Reviews on the preparation and use of microdispersions are given by H. Eicke in SÖFW-Journal, 118, 311 (1992) and Th. Förster et al. in SÖFW-Journal, 122, 746 (1996); reference may further be made to the publications DE-A1 4411557 (Henkel) and EP-A1 0687206 (L'Oréal).
Oil Components
Suitable oil components are, for example, Guerbet alcohols based on fatty alcohols having 6 to 18, preferably 8 to 10, carbon atoms, esters of linear C
6
-C
22
-fatty acids with linear C
6
-C
22
-fatty alcohols, esters of branched C
6
-C
13
-carboxylic acids with linear C
6
-C
22
-fatty alcohols, esters of linear C
6
-C
22
-fatty acids with branched alcohols, in particular 2-ethylhexanol, esters of linear and/or branched fatty acids with polyhydric alcohols (such as, for example, propylene glycol, dimerdiol or trimertriol) and/or Guerbet alcohols, triglycerides based on C
6
-C
10
-fatty acids, liquid mono-/di-/triglyceride mixtures based on C
6
-C
18
-fatty acids, esters of C
6
-C
22
-fatty alcohols and/or Guerbet alcohols with aromatic carboxylic acids, in particular benzoic acid, esters of C
2
-C
12
-dicarboxylic acids with linear or branched alcohols having 1 to 22 carbon atoms or polyols having 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched
Foerster Thomas
Golinski Frank
Kahre Joerg
Lorenz Heribert
Pitfield Adrian
Cognis Deutschland GmbH & Co. KG
Douyon Lorna M.
Drach John E
Elhilo Eisa
Trzaska Steven J
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