Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2001-12-20
2004-05-25
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S409000, C008S424000, C008S426000, C008S565000, C008S597000, C008S608000, C548S455000, C548S511000
Reexamination Certificate
active
06740128
ABSTRACT:
The object of the present invention is a preparation for dyeing fibers, especially of human hair, it being also possible to decolorize the dyeing obtained gently once again at a later time, should this be desired.
Hair-coloring preparations are divided mainly into the areas of oxidation dyeing agents or of tints, depending on the original color of the hair, which is to be colored, and the desired end result. Oxidation hair dyes are outstandingly suitable for covering higher proportions of gray. The oxidation dyeing agents, which are used for gray portions up to 50%, usually are referred to as oxidative tints. On the other hand, the oxidation dyeing agents, which are used when the proportion of gray exceeds 50% or for “lightening” the color, usually are referred to as so-called oxidative dyes. Direct dyes are mainly contained in non-oxidative dyeing agents (so-called tinting agents). Because of their small size, some direct dyes, such as nitro dyes, can penetrate into the hair and dye it directly, at least in the outer regions. Such tints are very gentle to the hair and usually withstand 6 to 8 washings and enable up to about 20% gray to be covered.
In general, direct and oxidative tints are washed out when the hair is washed a few times. Among other factors, the period depends greatly on the structure of the hair and on the shade used. In some cases, oxidative dyes can fade over time. Usually, however, they remain in the hair until the next time the hair is cut. However, a hair coloring, which can be removed at any time, may be desirable for persons who wish to have a particular color only for a certain time or do not like the coloring achieved. Likewise, in the event that the hair is colored for the first time, the possibility of removing the coloring gently and completely reduces the fear of a too drastic change in color (“test coloring”).
The German Offenlegungsschrift 197 17 281 discloses the use of a combination of benzylidene ketones and amines and/or hydroxy compounds and/or compounds containing acidic CH compounds for dyeing hair without the addition of oxidizing agents. Likewise the German utility patent 299 08 464 discloses that hair can be dyed permanently by a combination of certain 1,2,3,3-tetramethyl-3H-indolium salts and carbonyl compounds, even without the addition of oxidizing agents.
It is therefore an object of the present invention, to provide a dyeing preparation, which has a very long shelf life and makes possible, on the one hand, a gentle, intensive and stable coloring of the fibers without the use of an oxidizing agent, as well as a gentle and complete removal of this coloring at any time.
Surprisingly, it has now been found that this objective can be accomplished by using a preparation, which can be obtained by mixing a component, containing an enamine, with a component, which contains a carbonyl compound and a component, which contains a primary amine.
An object of the present invention therefore is a preparation for coloring fibers (A), such as wool, silk, cotton or hair and especially human hair, which is produced by mixing two components (A1) and (A2), wherein the component (A1) has an acidic pH and contains at least one enamine of Formula (I) or its acid addition salt of Formula (Ia)
wherein R1 represents a single ring or multi-ring aromatic group, especially an unsubstituted 5-membered or 6-membered aryl group (preferably a phenyl group), an unsubstituted 5-membered or 6-membered heterocyclic group (preferably a pyridyl group or naphthyl group), a 5-membered or 6-membered aryl group, substituted with a C1 to C4 alkyl group, a C1 to C4 hydroxyalkyl group, a hydroxy group, a methoxy group, a dialkylamino group or a halogen group (F, Cl, Br, I) (preferably a substituted phenyl group), or a 5-membered or 6-membered heterocyclic group, substituted with a C1 to C4 alkyl group, a C1 to C4 hydroxyalkyl group, a hydroxy group, a methoxy group, a dialkylamino group or a halogen group (F, Cl, Br, I) (preferably a substituted pyridyl group or naphthyl group), R2 is a linear or branched C1 to C8 alkyl group, a linear or branched C1 to C8 hydroxyalkyl group or a C1 to C8 alkoxyalkyl group, wherein oxygen atoms may be located between the carbon atoms of the alkyl chain, R3 is a linear or branched C1 to C8 alkyl group, a C1 to C8 alkoxyalkyl group, a linear or branched C1 to C8 alkylene group, a C1 to C8 alkoxyalkylene group, an oxygen atom, a sulfur atom, an —NH group, or an —NR group, wherein R is an alkyl group, an alkoxyalkyl group, a hydroxyalkyl group or hydrogen, the R1 and R3 groups, together with the nitrogen atom and the carbon atom of the basic enamine structure being able to form a cyclic compound and R4 being hydrogen, a linear C1 to C4 alkyl group or a branched C1 to C4 alkyl group, A
−
being the anion of an organic or inorganic acid, and the component (A2) having an alkaline pH and containing at least one carbonyl compound and at least one primary amine
Preferred are compounds of Formula (I), in which the R1 and R3 groups together with the nitrogen atom and the carbon atom of the basic enamine structure form a cyclic compound, R3 preferably being linked to the aromatic R1 group at the carbon, which is in the ortho position to the enamine-substituted carbon.
Especially preferred are the following enamines of Formula (II) to (IX), in which X is a carbon atom, substituted with two C1 to C4 alkyl groups, which may be the same or different and, in particular, are two methyl groups, a carbon atom, substituted with a C1 to C4 alkyl group and a hydroxy group, a sulfur atom, an alkylated nitrogen atom, a not-alkylated nitrogen atom or an oxygen atom, and R2 is a linear or branched C1 to C8 alkyl group, a linear or branched C1 to C8 hydroxyalkyl group, or a C1 to C8 alkoxyalkyl group, in which there may be oxygen atoms between the carbon atoms of the alkyl chain, R4 is hydrogen, a linear C1 to C4 alkyl group or a branched C1 to C4 alkyl group, R5, R6, R7 and R8 independently of one another are hydrogen, a linear or branched C1 to C4 alkyl group, a linear or branched C1 to C4 hydroxyalkyl group, a hydroxy group, a methoxy group, an amino group, a monoalkylamino group, a dialkylamino group, a benzyl group or a halogen atom (F, Cl, Br, I) and A
−
is chloride, bromide, iodide, sulfate, hydrogen sulfate, toluenesulfonate, benzenesulfonate, monomethyl sulfate, hexafluorophosphate, hexafluoroantimonate, tetrafluoroborate, tetraphenylborate, formate, acetate or propionate, the chloride ion, the tetrafluoroborate ion, the acetate ion and the hydrogen sulfate ion being particularly preferred.
Of the compounds of the Formulas (II) to (IX), especially the following should be mentioned: 1,3,3-trimethyl-2-methylene-indoline as well as its salts, 1,3,3,4-tetramethyl-2-methylene-indoline as well as its salts, 1,3,3,5-tetramethyl-2-methylene-indoline as well as its salts, 1,3,3,6-tetramethyl-2-methylene-indoline as well as its salts, 1,3,3,7-tetramethyl-2-methylene-indoline as well as its salts, 1,3,3,6,7-pentamethyl-2-methylene-indoline as well as its salts, 1,3,3,5,7-pentamethyl-2-methylene-indoline as well as its salts, 1,3,3,4,7-pentamethyl-2-methylene-indoline as well as its salts, 5-chloro-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-fluoro-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-isopropyl-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-hydroxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-methoxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-amino-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 6-hydroxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 6-methoxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5-methoxy-6-amino-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5,6-dihydroxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5,6-dimethoxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 4,5-dihydroxy-1,3,3-trimethyl-2-methylene-indoline as well as its salts, 5,7-dihydroxy-1,3,3-trimethyl-2-methylen
Javet Manuela
Mueller Catherine
Elhilo Eisa
Gupta Yogendra N.
Striker Michael J.
Wella Aktiengesellschaft
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