A reagent for coloring keratin materials, comprising an amino polysiloxane, a coloring compound, a preservative, and an ethoxylated fatty alcohol

Abstract

The present invention relates to a reagent for dyeing keratin materials, in particular human hair, comprising: (a1) at least one amino-functionalized polysiloxane polymer, and (a2) at least one color-imparting compound, and (a3) at least one preservative and (a4) at least one non-ionic surfactant selected from the group consisting of addition products of ethylene oxide and C8-C 24 fatty alcohols. The present invention also relates to a method for dyeing keratin materials using the above-mentioned reagent on keratin materials.

Description

[0001] The present application relates to a reagent for coloring keratin materials, especially human hair, which contains at least one amino-functionalized polysiloxane polymer (a1), at least one coloring compound (a2), at least one preservative (a3), and at least one non-ionic surfactant (a4) selected from the group consisting of addition products of ethylene oxide and C8-C 24 fatty alcohols.

[0002] A second object of the present application is a method for dyeing keratin materials, especially human hair, in which the reagent of the first object of the present invention is applied to the keratin material, allowed to act, and then washed off with water.

[0003] Changing the shape and color of keratin materials, especially human hair, is an important area of modern cosmetics. To change the color of hair, experts are aware of various coloring systems according to the coloring requirements. Oxidation dyes are usually used for permanent and strong coloring, having good fastness properties and good gray coverage. Such colorants contain oxidation dye precursors, so-called developer components and coupler components, which form the actual dye between them under the influence of an oxidizing agent such as hydrogen peroxide. Oxidation dyes are characterized by a very durable dyeing effect.

[0004] When using direct dyes, the ready-made dyes diffuse from the colorant into the hair fibers. Compared with oxidative hair dyeing, the dyeing obtained with direct dyes has a shorter shelf life and faster washability. Dyeing with direct dyes usually remains on the hair for a period of 5-20 washes.

[0005] It is known to use colored pigments for short-term color changes on hair and / or skin. Colored pigments are generally understood as insoluble coloring substances. They are present undissolved in the form of small particles in the dye preparation and are only deposited externally on the hair fibers and / or the skin surface. Therefore, they can usually be removed again without residue by washing several times with a surfactant-containing detergent. Various products of this type are available on the market under the name of hair mascara.

[0006] If the user wants a particularly long-lasting dyeing, then using oxidative dyes is so far the only option. However, despite many optimization attempts, an unpleasant ammonia or amine odor cannot be completely avoided in oxidative hair dyeing. The hair damage still associated with the use of oxidative dyes also has a negative impact on the user's hair. Therefore, an ongoing challenge is to find alternative, high-performance dyeing methods. In particular, the wash fastness based on the use of pigments needs to be significantly improved.

[0007] The object of the present invention is to provide a dyeing system having a coloring intensity comparable to oxidative dyeing. However, oxidative dye precursors commonly used for this purpose should not be used. A technique is sought which is capable of fixing colorant compounds known from the prior art, such as in particular pigments, to hair in an extremely durable manner. When these reagents are used in a dyeing process, a particularly intense dyeing result with good fastness properties should be obtained. Most importantly, these reagents should have improved wash fastness.

[0008] Surprisingly, it has now been found that if keratin materials, in particular hair, are colored with a reagent containing at least one amino-functionalized polysiloxane polymer (a1), at least one coloring compound (a2), at least one preservative (a3) and at least one nonionic surfactant (a4) selected from the group of ethoxylated C8-C 24 fatty alcohols, the above problems can be well solved.

[0009] A first object of the present invention is a reagent for coloring keratin materials, in particular human hair, which contains defined weight ratios optimized relative to each other,

[0010] (a1) at least one amino-functionalized polysiloxane polymer, and

[0011] (a2) at least one color-imparting compound, and

[0012] (a3) at least one preservative, and

[0013] (a4) at least one nonionic surfactant selected from the group of addition products of ethylene oxide and C8-C 24 fatty alcohols.

[0014] During the work on the present invention, it has surprisingly been shown that the use of a preservative (a3) and a specific nonionic surfactant (a4) in a reagent containing an amino polysiloxane (a1) and a coloring compound (a2) leads to an improvement in wash fastness when the reagent is applied to keratin materials, human hair, in a dyeing process.

[0015] Keratin material

[0016] Keratin materials include hair, skin, nails (such as fingernails and / or toenails). Wool, fur and feathers also fall within the definition of keratin materials.

[0017] Preferably, keratin materials are understood to be human hair, human skin and human nails, in particular fingernails and toenails. Keratin materials are to be understood as human hair.

[0018] Colorant

[0019] In the context of the present invention, the term "colorant" is used to color keratin materials, especially hair, using coloring compounds, in particular pigments. During this coloring process, the pigments are deposited as a coloring compound in the form of a particularly uniform, homogeneous and smooth film on the surface of the keratin material.

[0020] Amino-functionalized polysiloxane polymer (a1)

[0021] As an essential first component (a1) of the present invention, the reagent contains at least one amino-functionalized polysiloxane polymer. The amino-functionalized polysiloxane polymer can also be referred to as amino polysiloxane or amino dimethyl silicone oil.

[0022] The polysiloxane polymer is generally a macromolecule having a molecular weight of at least 500 g / mol, preferably at least 1000 g / mol, more preferably at least 2500 g / mol, and particularly preferably at least 5000 g / mol, and it contains repeating organic units.

[0023] The maximum molecular weight of the polysiloxane polymer depends on the degree of polymerization (the number of polymerized monomers) and the batch size, and is partly determined by the polymerization method. For the purposes of the present invention, if the maximum molecular weight of the polysiloxane polymer does not exceed 10 7 g / mol, preferably does not exceed 10 6 g / mol and particularly preferably does not exceed 10 5 g / mol, it is preferred.

[0024] The polysiloxane polymer contains many Si-O repeating units, and the Si atoms can carry organic groups such as alkyl or substituted alkyl groups. Alternatively, the polysiloxane polymer is also thus referred to as polydimethylsiloxane.

[0025] Corresponding to the high molecular weight of the polysiloxane polymer, they are based on more than 10 Si-O repeating units, preferably more than 50 Si-O repeating units, more preferably more than 100 Si-O repeating units, and most preferably more than 500 Si-O repeating units.

[0026] The amino-functionalized polysiloxane polymer should be understood as a functionalized polysiloxane carrying at least one structural unit having an amino group. Preferably, the amino-functionalized polysiloxane polymer carries a plurality of structural units each having at least one amino group. The amino group should be understood to represent primary, secondary and tertiary amino groups. All of these amino groups can be protonated in an acidic environment and then exist in their cationic form.

[0027] In principle, good results can be obtained by using amino-functionalized polysiloxane polymers (a1) if they carry at least one primary amino group, at least one secondary amino group and / or at least one tertiary amino group. However, when using amino-functionalized polysiloxane polymers (a1) in reagent (a), and the polymer contains at least one secondary amino group, it is observed that the dyeing has the best wash fastness.

[0028] In a very particularly preferred embodiment, the method according to the invention is characterized in that reagent (a) comprises at least one amino-functionalized polysiloxane polymer (a1) having at least one secondary amino group.

[0029] One or more secondary amino groups can be located at various positions of the amino-functionalized polysiloxane polymer. Particularly good results are found when using amino-functionalized polysiloxane polymers (a1) having at least one, preferably several, structural units of the formula (Si-amino).

[0030]

[0031] In the structural unit of the formula (Si-amino), the abbreviations ALK1 and ALK2 independently represent a straight-chain or branched divalent C1-C 20 alkylene.

[0032] In another very particularly preferred embodiment, the method according to the invention is characterized in that reagent (a) comprises at least one amino-functionalized polysiloxane polymer (a1) containing at least one structural unit of the formula (Si-amino),

[0033]

[0034] wherein ALK1 and ALK2 independently represent a straight-chain or branched C1-C 20 divalent alkylene.

[0035] The position marked with an asterisk (*) indicates the bonding to other structural units of the polysiloxane polymer. For example, the silicon atom adjacent to the asterisk can be bonded to another oxygen atom, and the oxygen atom adjacent to the asterisk can be bonded to another silicon atom or even to a C1-C6 alkyl group.

[0036] Divalent C1-C 20 alkylene can alternatively be referred to as divalent or bivalent C1-C 20 alkylene, which means that each ALK1 or AK2 group can form two bonds.

[0037] In the case of ALK1, one bond is from the silicon atom to the ALK1 group, and the second bond is between ALK1 and the secondary amino group.

[0038] In the case of ALK2, one bond is from the secondary amino group to the ALK2 group and the second bond is between ALK2 and the primary amino group.

[0039] Straight-chain divalent C1-C 20 Examples of alkylene groups include methylene (-CH2-), ethylene (-CH2-CH2-), propylene (-CH2-CH2-CH2-), and butylene (-CH2-CH2-CH2-CH2-). Propylene (-CH2-CH2-CH2-) is particularly preferred. Starting from a chain length of 3 carbon atoms, the divalent alkylene group can also be branched. Branched divalent C3-C 20 Examples of alkylene groups are (-CH2-CH(CH3)-) and (-CH2-CH(CH3)-CH2-).

[0040] In another particularly preferred embodiment, the structural unit of formula (Si-amino) represents a repeating unit in the amino-functionalized polysiloxane polymer (a1), so that the polysiloxane polymer contains a plurality of structural units of formula (Si-amino).

[0041] Particularly suitable amino-functionalized polysiloxane polymers (a1) having at least one secondary amino group are listed below.

[0042] If at least one reagent (a) is applied to the keratin material in the process according to the invention, the reagent containing at least one amino-functionalized polysiloxane polymer (a1) comprising structural units of formula (Si-I) and formula (Si-II), a dyeing with optimal wash fastness can be obtained.

[0043]

[0044] In a further defined very particularly preferred embodiment, the process according to the invention is characterized in that the reagent (a) contains at least one amino-functionalized polysiloxane polymer (a1) comprising structural units of formula (Si-I) and formula (Si-II).

[0045]

[0046] The corresponding amino-functionalized polysiloxane polymers having structural units (Si-I) and (Si-II) are, for example, the commercial products DC 2-8566 or Dowsil 2-8566 Amino Fluid, which are commercially available from The Dow Chemical Company under the name "Siloxanes and polysiloxanes, 3-[(2-aminoethyl)amino]-2-methylpropyl methyl, dimethylsiloxane" and CAS number 106842-44-8.

[0047] In a further preferred embodiment, the method according to the invention is characterized in that a reagent (a) is applied to the keratin material, said reagent (a) containing at least one amino-functionalized polysiloxane polymer (a1) of the formula (Si-III),

[0048]

[0049] wherein

[0050] - m and n represent selected numbers such that the sum (n + m) is in the range from 1 to 1000,

[0051] - n is a number in the range from 0 to 999, and m is a number in the range from 1 to 1000,

[0052] - R1, R2 and R3 are identical or different and represent a hydroxyl group or a C 1-4 alkoxy group,

[0053] - where at least one of R1 to R3 represents a hydroxyl group;

[0054] A further preferred method according to the invention is characterized in that a reagent (a) is applied to the keratin material, said reagent (a) containing at least one amino-functionalized polysiloxane polymer (a1) of the formula (Si-IV),

[0055]

[0056] wherein

[0057] - p and q represent selected numbers such that the sum (q + p) is in the range from 1 to 1000,

[0058] - p is a number in the range from 0 to 999, and q is a number in the range from 1 to 1000,

[0059] - R1 and R2 are different and represent a hydroxyl group or a C 1-4 alkoxy group, and at least one of R1 to R2 represents a hydroxyl group.

[0060] The polysiloxanes of the formulas (Si-III) and (Si-IV) differ in the groups on the Si atom which carry the nitrogen-containing groups: in the formula (Si-III), R2 represents a hydroxyl group or a C1-4 alkoxy group, while the group in the formula (Si-IV) is a methyl group. The individual Si groups labeled with the indices m and n or p and q do not have to be present as blocks; on the contrary, the individual units can also be present in a statistically distributed manner, i.e. in the formulas (Si-III) and (Si-IV), not every R1-Si(CH3)2 group has to be bonded to a -[O-Si(CH3)2] group.

[0061] According to the method of the present invention, the application of a reagent (a) containing at least one amino-functionalized polysiloxane polymer (a1) of formula (Si-V) to keratin fibers has also proven to be particularly effective for the intended effect.

[0062]

[0063] wherein

[0064] A represents the group –OH, –O-Si(CH3)3, –O-Si(CH3)2OH, –O-Si(CH3)2OCH3,

[0065] D represents the group -H, –Si(CH3)3, –Si(CH3)2OH, –Si(CH3)2OCH3,

[0066] b, n and c represent integers between 0 and 1000,

[0067] it is stipulated that

[0068] -n > 0 and b + c > 0

[0069] - at least one of the conditions A = -OH or D = -H is satisfied.

[0070] In the above formula (Si-V), the individual siloxane units are statistically distributed with exponents b, c and n, i.e. they do not necessarily have to be block copolymers.

[0071] The reagent (a) may further comprise one or more different amino-functionalized polysiloxane polymers represented by the formula (Si-VI)

[0072] M(R a Q b SiO (4-a-b) / 2)x (R c SiO (4-c) / 2)y M(Si-VI)

[0073] wherein in the above formula R is a hydrocarbon or a hydrocarbon group having 1 to about 6 carbon atoms, and Q is a polar group of the general formula -R 1 HZ, wherein R 1is a divalent linking group bonded to a hydrogen bond, the group Z consists of carbon and hydrogen atoms, consists of carbon, hydrogen and oxygen atoms or consists of carbon, hydrogen and nitrogen atoms, and Z is an organic amino-functionalized group containing at least one amino functional group; "a" takes a value in the range of about 0 to about 2, "b" takes a value in the range of about 1 to about 3, "a" + "b" is less than or equal to 3, and "c" is a number in the range of about 1 to about 3, x is a number in the range of 1 to about 2,000, preferably about 3 to about 50, most preferably about 3 to about 25, y is a number in the range of about 20 to about 10,000, preferably about 125 to about 10,000, most preferably about 150 to about 1,000, and M is a suitable siloxane end group known in the prior art, preferably trimethylsilyloxy. Non-limiting examples of the group represented by R include alkyl groups such as methyl, ethyl, propyl, isopropyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, hexyl, isohexyl, etc.; alkenyl groups, such as vinyl, halo vinyl, alkyl vinyl, allyl, halo allyl, alkyl allyl; cycloalkyl groups, such as cyclobutyl, cyclopentyl, cyclohexyl, etc.; phenyl, benzyl, haloalkyl groups such as 3-chloropropyl, 4-bromobutyl, 3,3,3-trifluoropropyl, chlorocyclohexyl, bromophenyl, chlorophenyl, etc., and sulfur-containing groups, such as mercaptoethyl, mercaptopropyl, mercaptohexyl, mercaptophenyl, etc.; preferably R is an alkyl group containing 1 to about 6 carbon atoms, and most preferably R is methyl. R 1 Examples include methylene, ethylene, propylene, hexamethylene, decamethylene, -CH2CH(CH3)CH2-, phenylene, naphthylene, -CH2CH2SCH2CH2-, -CH2CH2OCH2-, -OCH2CH2-, -OCH2CH2CH2-, -CH2CH(CH3)C(O)OCH2-, -(CH2)3CC(O)OCH2CH2-, -C6H4C6H4-, -C6H4CH2C6H4-; and -(CH2)3C(O)SCH2CH2-.

[0074] Z is an organic amino-functionalized group containing at least one amino functional group. One possible formula for Z is NH(CH2) z NH2, where z is 1 or greater. Another possible formula for Z is -NH(CH2) z (CH2) zz NH, where z and zz are independently 1 or greater, and the structure contains a diamino ring structure, such as a piperazinyl group. Z is most preferably the -NHCH2CH2NH2 group. Another possible formula for Z is -N(CH2) z (CH2) zz NX2 or -NX2, where each X of X2 is independently selected from the group consisting of hydrogen and alkyl groups having 1 to 12 carbon atoms, and zz is 0.

[0075] Q is most preferably a polar amine functionalized group of the formula -CH2CH2CH2NHCH2CH2NH2. In this formula, "a" takes a value in the range of about 0 to about 2, "b" takes a value in the range of about 2 to about 3, "a" + "b" is less than or equal to 3, and "c" is a number in the range of about 1 to about 3. R a Q b SiO (4-a-b) / 2 units and R c SiO (4-c) / 2 The molar ratio of the units is in the range of about 1:2 to 1:65, preferably about 1:5 to about 1:65, and most preferably about 1:15 to about 1:20. If one or more polysiloxanes of the above formula are used, the various variable substituents in the above formula can be different for the various polysiloxane components present in the polysiloxane mixture.

[0076] In a particularly preferred embodiment, the method according to the invention is characterized in that the reagent (a) is applied to the keratin material, wherein the reagent (a) contains an amino-functionalized polysiloxane polymer of the formula (Si-VII)

[0077] R' a G 3-a -Si(OSiG2) n -(OSiG b R' 2-b ) m -O-SiG 3-a -R' a (Si-VII),

[0078] wherein represents:

[0079] -G is -H, phenyl, -OH, -O-CH3, -CH3, -O-CH2CH3, -CH2CH3, -O-CH2CH2CH3, -CH2CH2CH3, -O-CH(CH3)2, -CH(CH3)2, -O-CH2CH2CH2CH3, -CH2CH2CH2CH3, -O-CH2CH(CH3)2, -CH2CH(CH3)2, -O-CH(CH3)CH2CH3, -CH(CH3)CH2CH3, -O-C(CH3)3, -C(CH3)3;

[0080] -a represents a number between 0 and 3, especially 0;

[0081] -b represents a number between 0 and 1, especially 1;

[0082] - m and n are numbers whose sum (m + n) is between 1 and 2000, preferably between 50 and 150, where n preferably takes values from 0 to 1999 and from 49 to 149, and m preferably takes values from 1 to 2000, from 1 to 10,

[0083] - R' is a monovalent group selected from

[0084] o - Q - N(R") - CH2 - CH2 - N(R")2

[0085] o - Q - N(R")2

[0086] o - Q - N + (R")3A -

[0087] o - Q - N + H(R")2A -

[0088] o - Q - N + H2(R")A -

[0089] o - Q - N(R") - CH2 - CH2 - N + R"H2A - ,

[0090] where each Q is a chemical bond, - CH2 -, - CH2 - CH2 -, - CH2CH2CH2 -, - C(CH3)2 -, - CH2CH2CH2CH2 -, - CH2C(CH3)2 -, - CH(CH3)CH2CH2 -

[0091] R" represents the same or different groups selected from - H, - phenyl, - benzyl, - CH2 - CH(CH3)Ph, C 1-20 alkyl groups, preferably - CH3, - CH2CH3, - CH2CH2CH3, - CH(CH3)2, - CH2CH2CH2CH3, - CH2CH(CH3)2, - CH(CH3)CH2CH3, - C(CH3)3, and A represents an anion preferably selected from chloride ion, bromide ion, iodide ion or methyl sulfate.

[0092] In a further preferred embodiment, the method according to the invention is characterized in that reagent (a) is applied to the keratin material, said reagent (a) containing at least one amino-functionalized polysiloxane polymer (a1) of formula (Si - VIIa),

[0093]

[0094] Among them, m and n are numbers whose sum (m + n) is between 1 and 2000, preferably between 50 and 150, where n preferably takes values from 0 to 1999 and from 49 to 149, and m preferably takes values from 1 to 2000, from 1 to 10.

[0095] According to the INCI description, these polysiloxanes are called trimethylsilylamino polydimethylsiloxanes.

[0096] In another preferred embodiment, the method according to the invention is characterized in that reagent (a) is applied to the keratin material, said reagent (a) comprising at least one amino-functionalized polysiloxane polymer of formula (Si-VIIb)

[0097]

[0098] wherein R represents an -OH, -O-CH3 or -CH3 group, and m, n1 and n2 are numbers whose sum (m + n1 + n2) is between 1 and 2000, preferably between 50 and 150, the sum (n1 + n2) preferably takes values from 0 to 1999 and from 49 to 149, and m preferably takes values from 1 to 2000, from 1 to 10.

[0099] According to the INCI description, these amino-functionalized polysiloxane polymers are called amino polydimethylsiloxanes.

[0100] Regardless of which amino-functionalized polysiloxane is used, reagent (a) according to the invention containing an amino-functionalized polysiloxane polymer with an amine value higher than 0.25 meq / g, preferably higher than 0.3 meq / g and higher than 0.4 meq / g is preferred. The amine value represents the milliequivalent amine per gram of the amino-functionalized polysiloxane. The amine value represents the milliequivalent amine per gram of the amino-functionalized polysiloxane.

[0101] In addition, reagent (a) containing a specific 4-morpholinylmethyl-substituted polysiloxane polymer (a1) is also suitable for use in the method according to the invention. This amino-functionalized polysiloxane polymer contains structural units of formula (SI-VIII) and formula (Si-IX)

[0102]

[0103] The corresponding 4-morpholinylmethyl-substituted polysiloxane polymer is described below.

[0104] A very particularly preferred amino-functionalized polysiloxane polymer known as the name amino polydimethylsiloxane / morpholinylmethyl sesquisiloxane copolymer is known and can be commercially obtained in the form of raw material Belsil ADM 8301E from Wacker.

[0105] As the 4-morpholinylmethyl-substituted polysiloxane, for example, polysiloxanes having structural units of the formula (Si-VIII), (Si-IX) and (Si-X) can be used

[0106]

[0107] wherein

[0108] R1 is -CH3, -OH, -OCH3, -O-CH2CH3, -O-CH2CH2CH3 or -O-CH(CH3)2;

[0109] R2 is -CH3, -OH, or -OCH3.

[0110] The reagent (a) particularly preferably according to the present invention contains at least one 4-morpholinylmethyl-substituted polysiloxane of the formula (Si-XI)

[0111]

[0112] wherein

[0113] R1 is -CH3, -OH, -OCH3, -O-CH2CH3, -O-CH2CH2CH3 or -O-CH(CH3)2;

[0114] R2 is -CH3, -OH, or -OCH3.

[0115] B represents the group -OH, -O-Si(CH3)3, -O-Si(CH3)2OH, -O-Si(CH3)2OCH3,

[0116] D represents the group -H, -Si(CH3)3, -Si(CH3)2OH, -Si(CH3)2OCH3,

[0117] a, b and c independently represent integers between 0 and 1000, provided that a + b + c > 0

[0118] m and n independently of each other represent integers between 1 and 1000

[0119] provided that

[0120] - at least one of the conditions B = -OH or D = -H is satisfied,

[0121] - the units a, b, c, m and n are distributed statistically or in block form in the molecule.

[0122] The structural formula (Si-XI) is intended to illustrate that the siloxane groups n and m do not have to be directly bonded to the end groups B or D, respectively. Instead, in the preferred formula (Si-VI), a > 0 or b > 0, and in the particularly preferred formula (Si-VI), a > 0 and c > 0, that is, the end groups B or D are preferably connected to dimethylsilyloxy groups. In addition, in the formula (Si-VI), the siloxane units a, b, c, m, and n are preferably statistically distributed.

[0123] The polysiloxanes used according to the invention represented by the formula (Si-VI) can be trimethylsilyl-terminated (D or B = -Si(CH3)3), but they can also be dimethylsilylhydroxy-terminated on both sides, or dimethylsilylhydroxy-terminated on one side and dimethylsilylmethoxy-terminated on the other side. Particularly preferred polysiloxanes in the context of the present invention are selected from these polysiloxanes, wherein each of the

[0124] B = -O-Si(CH3)2OH and D = -Si(CH3)3

[0125] B = -O-Si(CH3)2OH and D = -Si(CH3)2OH

[0126] B = -O-Si(CH3)2OH and D = -Si(CH3)2OCH3

[0127] B = -O-Si(CH3)3 and D = -Si(CH3)2OH

[0128] B = -O-Si(CH3)2OCH3 and D = -Si(CH3)2OH.

[0129] These polysiloxanes result in a great improvement in the hair properties of the hair treated with the reagent according to the invention and lead to a significant improvement in the protection during the oxidation treatment.

[0130] It has been found that it is particularly advantageous if the reagent according to the invention contains a polysiloxane polymer (a1) functionalized with amino groups in a specific amount range. Particularly good results are obtained when the reagent contains a total amount of 0.1 to 8.0% by weight, preferably 0.2 to 5.0% by weight, more preferably 0.3 to 3.0% by weight, and most preferably 0.4 to 2.5% by weight, based on the total weight of the reagent.

[0131] In another particularly preferred embodiment, the reagent according to the invention is characterized in that it contains, based on the total weight of the reagent, a total amount of 0.1 to 8.0% by weight, preferably 0.2 to 5.0% by weight, more preferably 0.3 to 3.0% by weight, and very particularly preferably 0.4 to 2.5% by weight of one or more polysiloxane polymers (a1) functionalized with amino groups.

[0132] Coloring compound (a2)

[0133] As a second essential component, the reagent according to the invention contains at least one color - imparting compound (a2).

[0134] For the purposes of the present invention, a colorant compound is a substance capable of imparting color to keratin materials. Particularly suitable colorant compounds can be selected from the group consisting of pigments, direct - acting dyes, photochromic dyes, and thermochromic dyes.

[0135] In a further preferred embodiment, the reagent according to the invention is characterized in that it comprises at least one colorant compound (a2) selected from the group consisting of pigments, direct dyes, photochromic dyes, and thermochromic dyes.

[0136] Pigments within the scope of the present invention are coloring compounds with a solubility in water at 25 °C of less than 0.5 g / L, preferably less than 0.1 g / L, and even more preferably less than 0.05 g / L. Water solubility can be determined, for example, by the following method: Weigh 0.5 g of the pigment and place it in a beaker. Add a stir - fish. Then, add one liter of distilled water. While stirring on a magnetic stirrer, heat the mixture to 25 °C and continue for 1 hour. If, after this period, undissolved components of the pigment are still visible in the mixture, the solubility of the pigment is below 0.5 g / L. If the pigment - water mixture cannot be visually evaluated due to the high concentration of possibly finely - dispersed pigment, the mixture is filtered. If a portion of the undissolved pigment remains on the filter paper, the solubility of the pigment is below 0.5 g / L.

[0137] Suitable coloring pigments can be of inorganic and / or organic origin.

[0138] In a preferred embodiment, the reagent according to the invention is characterized in that it comprises at least one colorant compound (a2) selected from the group consisting of inorganic and / or organic pigments.

[0139] Preferred colored pigments are selected from synthetic or natural inorganic pigments. Inorganic colored pigments of natural origin can be made, for example, from chalk, ochre, umber, green earth, burnt Terra di Siena, or graphite. In addition, black pigments such as iron oxide black, colored pigments such as ultramarine or iron oxide red, and fluorescent or phosphorescent pigments can be used as inorganic colored pigments.

[0140] Particularly suitable are non-ferrous metal oxides, hydroxides and oxide hydrates, mixed-phase pigments, sulfur-containing silicates, silicates, metal sulfides, double metal cyanides, metal sulfates, chromates and / or molybdates. Preferred colored pigments are iron oxide black (CI 77499), iron oxide yellow (CI 77492), iron oxide red and brown (CI 77491), manganese violet (CI 77742), ultramarine (sodium aluminosilicate sulfonate, CI 77007, Pigment Blue 29), hydrated chromium oxide (CI 77289), iron blue (ferric ferrocyanide, CI 77510) and / or carmine (cochineal).

[0141] According to the invention, colored pearlescent pigments are also particularly preferred colored pigments. These are generally mica- and / or mica-based and can be coated with one or more metal oxides. Mica belongs to the phyllosilicates. The most important representatives of these silicates are muscovite, phlogopite, paragonite, biotite, lepidolite and margarite. To produce pearlescent pigments in combination with metal oxides, mica, mainly muscovite or phlogopite, is coated with metal oxides.

[0142] As an alternative to natural mica, synthetic mica coated with one or more metal oxides can also be used as a pearlescent pigment. Particularly preferred pearlescent pigments are based on natural or synthetic mica (mica) and are coated with one or more of the above-mentioned metal oxides. The color of the corresponding pigment can be changed by varying the layer thickness of one or more metal oxides.

[0143] In a further preferred embodiment, the reagent according to the invention is characterized in that it contains at least one colorant compound (a2) selected from the group of inorganic pigments, which inorganic pigments are preferably selected from the group consisting of: non-ferrous metal oxides, metal hydroxides, metal oxide hydrates, silicates, metal sulfides, double metal cyanides, metal sulfates, bronze pigments and / or colored mica or mica-based pigments coated with at least one metal oxide and / or metal oxychloride.

[0144] In a further preferred embodiment, the composition according to the invention is characterized in that it comprises (a) at least one colorant compound (a2) selected from the group of pigments, said pigments being mica- or mica-based pigments which react with one or more metal oxides selected from the group consisting of titanium dioxide (CI 77891), iron oxide black (CI 77499), iron oxide yellow (CI 77492), iron oxide red and / or brown (CI 77491, CI 77499), manganese violet (Cl 77742), ultramarine (sodium aluminosilicate sulfonate, CI 77007, Pigment Blue 29), hydrated chromium oxide (CI 77289), chromium oxide (CI 77288) and / or iron blue (ferric ferrocyanide, CI 77510).

[0145] Examples of particularly suitable colored pigments are commercially available from Merck under the trade names and from Sensient under the trade names and from Eckart Cosmetic Colors under the trade name and from Sunstar under the trade name Commercially available.

[0146] Particularly preferred colored pigments with the trade name are, for example:

[0147] Colorona Copper, Merck, mica, CI 77491 (iron oxide)

[0148] Colorona Passion Orange, Merck, mica, CI 77491 (iron oxide), aluminum oxide

[0149] Colorona Patina Silver, Merck, mica, CI 77499 (iron oxide), CI 77891 (titanium dioxide)

[0150] Colorona RY, Merck, CI 77891 (titanium dioxide), mica, CI 75470 (carmine)

[0151] Colorona Oriental Beige, Merck, mica, CI 77891 (titanium dioxide), CI 77491 (iron oxide)

[0152] Colorona Dark Blue, Merck, mica, titanium dioxide, ferric ferrocyanide

[0153] Colorona Chameleon, Merck, CI 77491 (Iron Oxide), Mica

[0154] Colorona Aborigine Amber, Merck, Mica, CI 77499 (Iron Oxide), CI 77891 (Titanium Dioxide)

[0155] Colorona Blackstar Blue, Merck, CI 77499 (Iron Oxide), Mica

[0156] Colorona Patagonian Purple, Merck, Mica, CI 77491 (Iron Oxide), CI 77891 (Titanium Dioxide), CI 77510 (Ferric Ferrocyanide)

[0157] Colorona Red Brown, Merck, Mica, CI 77491 (Iron Oxide), CI 77891 (Titanium Dioxide)

[0158] Colorona Russet, Merck, CI 77491 (Titanium Dioxide), Mica, CI 77891 (Iron Oxide)

[0159] Colorona Imperial Red, Merck, Mica, Titanium Dioxide (CI 77891), D&C Red No. 30 (CI73360)

[0160] Colorona Majestic Green, Merck, CI 77891 (Titanium Dioxide), Mica, CI 77288 (Chrome Oxide Green)

[0161] Colorona Light Blue, Merck, Mica, Titanium Dioxide (CI 77891), Ferric Ferrocyanide (CI77510)

[0162] Colorona Red Gold, Merck, Mica, CI 77891 (Titanium Dioxide), CI 77491 (Iron Oxide)

[0163] Colorona Gold Plus MP 25, Merck, Mica, Titanium Dioxide (CI 77891), Iron Oxide (CI77491)

[0164] Colorona Carmine Red, Merck, Mica, Titanium Dioxide, Carmine

[0165] Colorona Blackstar Green, Merck & Co., mica, CI 77499 (iron oxide)

[0166] Colorona Bordeaux, Merck & Co., mica, CI 77491 (iron oxide)

[0167] Colorona Bronze, Merck & Co., mica, CI 77491 (iron oxide)

[0168] Colorona Bronze Fine, Merck & Co., mica, CI 77491 (iron oxide)

[0169] Colorona Fine Gold MP 20, Merck & Co., mica, CI 77891 (titanium dioxide), CI 77491 (iron oxide)

[0170] Colorona Sienna Fine, Merck & Co., CI 77491 (iron oxide), mica

[0171] Colorona Sienna, Merck & Co., mica, CI 77491 (iron oxide)

[0172] Colorona Precious Gold, Merck & Co., mica, CI 77891 (titanium dioxide), silica, CI77491 (iron oxide), tin oxide

[0173] Colorona Sun Gold Sparkle MP 29, Merck & Co., mica, titanium dioxide, iron oxide, mica, CI 77891, CI 77491 (EU)

[0174] Colorona Mica Black, Merck & Co., CI 77499 (iron oxide), mica, CI 77891 (titanium dioxide)

[0175] Colorona Bright Gold, Merck & Co., mica, CI 77891 (titanium dioxide), CI 77491 (iron oxide)

[0176] Colorona Blackstar Gold, Merck & Co., mica, CI 77499 (iron oxide)

[0177] Other particularly preferred commercial names are for colored pigments such as:

[0178] Xirona Golden Sky, Merck, silica, CI 77891 (titanium dioxide), tin oxide

[0179] Xirona Caribbean Blue, Merck, mica, CI 77891 (titanium dioxide), silica, tin oxide

[0180] Xirona Kiwi Rose, Merck, silica, CI 77891 (titanium dioxide), tin oxide

[0181] Xirona Magic Mauve, Merck, silica, CI 77891 (titanium dioxide), tin oxide.

[0182] In addition, particularly preferred color pigments with the trade name are, for example:

[0183] Unipure Red LC 381EM, Sensient, CI 77491 (iron oxide), silica

[0184] Unipure Black LC 989EM, Sensient, CI 77499 (iron oxide), silica

[0185] Unipure Yellow LC 182EM, Sensient, CI 77492 (iron oxide), silica

[0186] In another embodiment, the reagent according to the invention may further comprise one or more coloring compounds (a2) selected from the group consisting of organic pigments.

[0187] The organic pigments according to the invention are accordingly insoluble organic dyes or colored paints, which may be selected from, for example, the following groups: nitroso, nitro - azo, xanthene, anthraquinone, isoindolinone, isoindoline, quinacridone, perinone, dibenzo[a,h]anthracene, diketo - pyrrolopyrrole, indigo, thioindigo, dioxazine and / or triarylmethane compounds.

[0188] Examples of particularly suitable organic pigments are carmine, quinacridone, phthalocyanine, sorghum, blue pigments with Color Index numbers CI 42090, CI 69800, CI 69825, CI 73000, CI 74100, CI 74160, yellow pigments with Color Index numbers CI 11680, CI 11710, CI 15985, CI 19140, CI 20040, CI 21100, CI 21108, CI 47000, CI 47005, green pigments with Color Index numbers CI 61565, CI 61570, CI 74260, orange pigments with Color Index numbers CI 11725, CI 15510, CI 45370, CI 71105, and red pigments with Color Index numbers CI 12085, CI 12120, CI 12370, CI 12420, CI 12490, CI 14700, CI 15525, CI 15580, CI 15620, CI 15630, CI 15800, CI 15850, CI 15865, CI 15880, CI 17200, CI 26100, CI 45380, CI 45410, CI 58000, CI 73360, CI 73915, and / or CI 75470.

[0189] In another particularly preferred embodiment, the reagent according to the invention is characterized in that it comprises at least one colorant compound (a2) selected from the group of organic pigments, said organic pigments preferably being selected from the group consisting of carmine, quinacridone, phthalocyanine, sorghum, blue pigments with color index numbers Cl 42090, CI 69800, CI 69825, CI 73000, CI 74100, CI 74160, yellow pigments with color index numbers CI 11680, CI 11710, CI 15985, CI 19140, CI 20040, CI 21100, CI 21108, CI 47000, CI 47005, green pigments with color index numbers CI 61565, CI 61570, CI 74260, orange pigments with color index numbers CI 11725, CI 15510, CI 45370, CI 71105, and red pigments with color index numbers CI 12085, CI 12120, CI 12370, CI 12420, CI 12490, CI 14700, CI 15525, CI 15580, CI 15620, CI 15630, CI 15800, CI 15850, CI 15865, CI 15880, CI 17200, CI 26100, CI 45380, CI 45410, CI 58000, CI 73360, CI 73915 and / or CI 75470.

[0190] The organic pigment can also be a colored coating. In the context of the present invention, the term colored paint refers to particles comprising a layer of absorbing dye, the particles and the units of the dye being insoluble under the above conditions. The particles can be, for example, an inorganic matrix, which can be aluminum, silica, calcium borosilicate, calcium aluminoborosilicate or even aluminum.

[0191] For example, alizarin colored varnish can be used.

[0192] Due to their excellent lightfastness and temperature resistance, the above pigments are particularly preferably used in the reagent (a) of the method according to the invention. It is also preferred if the pigments used have a certain particle size. Thus, according to the invention, it is advantageous if the average particle size D 50 is 1.0 - 50 μm, preferably 5.0 - 45 μm, preferably 10 - 40 μm, 14 - 30 μm. The average particle size D 50 can be determined, for example, using the dynamic light scattering (DLS) method.

[0193] The colorant compound (a2), a colorant compound selected from the group of pigments, represents the second essential element of the reagent according to the invention and is preferably used in the reagent in a specific range of amounts.

[0194] Particularly good results are obtained when the reagent contains, based on the total weight of the reagent, a total of 0.01 to 10.0% by weight, preferably 0.1 to 5.0% by weight, more preferably 0.2 to 2.5% by weight and very preferably 0.25 to 1.5% by weight of one or more pigments (a2).

[0195] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains, based on the total weight of the reagent, a total of 0.01 to 10.0% by weight, preferably 0.1 to 5.0% by weight, more preferably 0.2 to 2.5% by weight and very particularly preferably 0.25 to 1.5% by weight of one or more pigments (a2).

[0196] As the colorant compound (a2), the reagent according to the invention may also contain one or more direct dyes. Direct dyes are dyes that are directly attracted to the hair and do not require an oxidation process to form color. Direct dyes are generally nitrobenzene diamines, nitroaminophenols, azo dyes, anthraquinones, triarylmethane dyes or indophenols.

[0197] Direct dyes within the meaning of the present invention have a solubility in water (760 mmHg) at 25 °C greater than 0.5 g / L and are therefore not considered pigments.

[0198] Preferably, direct dyes within the meaning of the present invention have a solubility in water (760 mmHg) at 25 °C greater than 1.0 g / L.

[0199] Direct dyes can be classified into anionic direct dyes, cationic direct dyes and non-ionic direct dyes.

[0200] In another embodiment, the method according to the invention is characterized in that the reagent (a) comprises at least one colorant compound (a2) selected from the group consisting of anionic direct dyes, non-ionic direct dyes and cationic direct dyes.

[0201] Suitable cationic direct dyes include Basic Blue 7, Basic Blue 26, HC Blue 16, Basic Violet 2 and Basic Violet 14, Basic Yellow 57, Basic Red 76, Basic Blue 16, Basic Blue 347 (Cationic Blue 347 / Dystar), HC Blue No. 16, Basic Blue 99, Basic Brown 16, Basic Brown 17, Basic Yellow 57, Basic Yellow 87, Basic Orange 31, Basic Red 51, Basic Red 76.

[0202] As non-ionic direct dyes, non-ionic nitro and quinone dyes and neutral azo dyes can be used. Suitable non-ionic direct dyes are those listed under the following international names or trade names HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 12, HC Orange 1, Disperse Orange 3, HC Red 1, HC Red 3, HC Red 10, HC Red 11, HC Red 13, HC Red BN, HC Blue 2, HC Blue 11, HC Blue 12, Disperse Blue 3, HC Purple 1, Disperse Purple 1, Disperse Purple 4, Disperse Black 9, and those named after known compounds such as 1,4-diamino-2-nitrobenzene, 2-amino-4-nitrophenol, 1,4-bis-(2-hydroxyethyl)-amino-2-nitrobenzene, 3-nitro-4-(2-hydroxyethyl)-aminophenol, 2-(2-hydroxyethyl)amino-4,6-dinitrophenol, 4-[(2-hydroxyethyl)amino)-3-nitro-1-methylbenzene, 1-amino-4-(2-hydroxyethyl)-amino-5-chloro-2-nitrobenzene, 4-amino-3-nitrophenol, 1-(2'-ureidoethyl)amino-4-nitrobenzene, 2-[(4-amino-2-nitrophenyl)amino]benzoic acid, 6-nitro-1,2,3,4-tetrahydroquinoxaline, 2-hydroxy-1,4-naphthoquinone, picric acid and its salts, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino-3-nitrobenzoic acid and 2-chloro-6-ethylamino-4-nitrophenol.

[0203] Anionic direct dyes are also known as acid dyes. Acid dyes are direct dyes having at least one carboxylic acid group (-COOH) and / or one sulfonic acid group (-SO3H). Depending on the pH value, the protonated forms (-COOH, -SO3H) of the carboxylic acid or sulfonic acid groups are in equilibrium with their deprotonated forms (-COO - -, -SO3 - ). The proportion of the protonated form increases with decreasing pH. If the direct dye is used in the form of its salt, the carboxylic acid group or sulfonic acid group is present in the deprotonated form and is neutralized with the corresponding stoichiometric equivalent of cations to maintain electrical neutrality. The acid dyes of the present invention can also be used in the form of their sodium salts and / or their potassium salts.

[0204] The acid dyes within the meaning of the present invention have a solubility greater than 0.5 g / L in water (760 mmHg) at 25°C and are therefore not considered pigments. Preferably, the acid dyes within the meaning of the present invention have a solubility greater than 1.0 g / L in water (760 mmHg) at 25°C.

[0205] The alkaline earth metal salts (such as calcium salts and magnesium salts) or aluminum salts of acid dyes generally have lower solubility than the corresponding alkali metal salts. If the solubility of these salts is lower than 0.5 g / L (25°C, 760 mmHg), they do not fall within the definition of direct dyes.

[0206] The basic characteristic of acid dyes is their ability to form an anionic charge, and the carboxylic acid or sulfonic acid groups responsible therefor are usually linked to different chromophore systems. For example, suitable chromophore systems can be found in the structures of nitrobenzene diamines, nitroaminophenols, azo dyes, anthraquinone dyes, triarylmethane dyes, xanthene dyes, rhodamine dyes, oxazine dyes and / or indophenol dyes.

[0207] In another embodiment, the method for dyeing keratin materials is characterized in that composition (a) comprises at least one anionic direct dye selected from the group consisting of: nitrobenzene diamines, nitroaminophenols, azo dyes, anthraquinone dyes, triarylmethane dyes, xanthene dyes, rhodamine dyes, oxazine dyes and / or indophenol dyes, rhodamine dyes, oxazine dyes and / or indophenol dyes, dyes selected from the above group each having at least one carboxylic acid group (-COOH), sodium carboxylate group (-COONa), potassium carboxylate group (-COOK), sulfonic acid group (-SO3H), sodium sulfonate group (-SO3Na) and / or potassium sulfonate group (-SO3K).

[0208] Suitable acid dyes can include, for example, one or more compounds selected from the following group: Acid Yellow 1 (D&C Yellow 7, Citrus Red 2, Ext. D&C Yellow No. 7, Japan Yellow 403, CI 10316, COLIPA n°B001), Acid Yellow 3 (COLIPA n°: C54, D&C Yellow N°10, Quinoline Yellow, E104, Food Yellow 13), Acid Yellow 9 (CI 13015), Acid Yellow 17 (CI 18965), Acid Yellow 23 (COLIPA n°c29, Covacap Jaune W 1100 (LCW), Sicovit Tartrazine 85E 102 (BASF), Tartrazine, Food Yellow 4, Japan Yellow 4, FD&C Yellow No. 5), Acid Yellow 36 (CI 13065), Acid Yellow 121 (CI 18690), Acid Orange 6 (CI 14270), Acid Orange 7 (2-Naphthol Orange, Orange II, CI 15510, D&C Orange 4, COLIPA n°c015), Acid Orange 10 (C.I. 16230; Orange G Sodium Salt), Acid Orange 11 (CI 45370), Acid Orange 15 (CI 50120), Acid Orange 20 (CI 14600), Acid Orange 24 (Brown 1; CI 20170; KATSU201; Sodium-Free Salt; Brown No. 201; Resorcin Brown; Acid Orange 24; Japan Brown 201; D&C Brown No. 1), Acid Red 14 (C.I. 14720), Acid Red 18 (E124, Red 18; CI 16255), Acid Red 27 (E123, CI 16185, C-Rot 46, Echtrot D, FD&C Red No. 2, Food Red 9, Naphthol Red S), Acid Red 33 (Red 33, Cherry Red, D&C Red 33, CI 17200), Acid Red 35 (CI C.I. 18065), Acid Red 51 (CI 45430, Erythrosine B (Pyrosin B), Erythrosine (Tetraiodfluorescein), Eosin J, Iodeosin), Acid Red 52 (CI 45100, Food Red 106, Solar Rhodamine B, Acid Rhodamine B, Red n°106 Pantone Glitter), Acid Red 73 (CI27290), Acid Red 87 (Eosin, CI 45380), Acid Red 92 (COLIPA n°c53, CI 45410), Acid Red 95 (CI45425, Erythrosine, Simacid Erythrosine Y), Acid Red 184 (CI 15685), Acid Red 195, Acid Violet 43 (Jarocol Violet 43, Ext. D&C Violet n°2, C.I.60730, COLIPAn℃063), Acid Violet 49 (CI 42640), Acid Violet 50 (CI50325), Acid Blue 1 (Patent Blue, CI 42045), Acid Blue 3 (Patent Blue V, CI 42051), Acid Blue 7 (CI 42080), Acid Blue 104 (CI 42735), Acid Blue 9 (E 133, Patent Blue AE, Amidoblau AE, Food Color Brilliant Blue A, CI42090, C.I. Food Blue 2), Acid Blue 62 (CI 62045), Acid Blue 74 (E 132, CI 73015), Acid Blue 80 (CI61585), Acid Green 3 (CI 42085, Food Green 1), Acid Green 5 (CI 42095), Acid Green 9 (C.I.42100), Acid Green 22 (C.I.42170), Acid Green 25 (CI 61570, Japan Green 201, D&C Green No. 5), Acid Green 50 (Acid Brilliant Green BS, C.I.44090, Acid Brilliant Green BS, E 142), Acid Black 1 (Black n°401, Naphthalene Blue Black 10B, Amide Black 10B, CI 20 470, COLIPA n°B15), Acid Black 52 (CI 15711), Food Yellow 8 (CI 14270), Food Blue 5, D&C Yellow 8, D&C Green 5, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2 and / or D&C Brown 1.

[0209] For example, the water solubility of an anionic direct dye can be determined as follows. Add 0.1 g of the anionic direct dye to a beaker. Add a stir-fish. Then add 100 ml of water. While stirring, heat the mixture on a magnetic stirrer to 25 °C. Stir for 60 minutes. Then visually evaluate the aqueous mixture. If there are still undissolved residues, increase the amount of water - for example, add it stepwise in 10 ml increments. Add water until the dye dosage is completely dissolved. If the dye-water mixture cannot be visually evaluated due to the high intensity of the dye, filter the mixture. If a portion of the undissolved dye remains on the filter paper, repeat the solubility test with a higher amount of water. If 0.1 g of the anionic direct dye dissolves in 100 ml of water at 25 °C, the solubility of the dye is 1.0 g / L.

[0210] Acid Yellow 1 is called disodium 8-hydroxy-5,7-dinitro-2-naphthalenesulfonate and has a solubility in water of at least 40 g / L (25 °C).

[0211] Acid Yellow 3 is a mixture of the sodium salts of the mono- and disulfonic acids of 2-(2-quinolinyl)-1H-inden-1,3(2H)-dione and has a water solubility of 20 g / L (25 °C).

[0212] Acid Yellow 9 is the disodium salt of 8-hydroxy-5,7-dinitro-2-naphthalenesulfonic acid, and its solubility in water is higher than 40 g / L (25 °C).

[0213] Acid Yellow 23 is the trisodium salt of 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-((4-sulfophenyl)azo)-1H-pyrazole-3-carboxylic acid, and is highly soluble in water at 25 °C.

[0214] Acid Orange 7 is the sodium salt of 4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid. Its solubility in water is greater than 7 g / L (25 °C).

[0215] Acid Red 18 is the trisodium salt of 7-hydroxy-8-[(E)-(4-sulfo-1-naphthyl)-diazenyl]-1,3-naphthalenedisulfonic acid, and has a very high solubility in water of greater than 20 wt%.

[0216] Acid Red 33 is the disodium salt of 5-amino-4-hydroxy-3-(phenylazo)-naphthalene-2,7-disulfonic acid, and its solubility in water is 2.5 g / L (25 °C).

[0217] Acid Red 92 is the disodium salt of 3,4,5,6-tetrachloro-2-(1,4,5,8-tetrabromo-6-hydroxy-3-oxoxanthen-9-yl)benzoic acid, and its solubility in water is expressed as greater than 10 g / L (25 °C).

[0218] Acid Blue 9 is the disodium salt of 2-({4-[N-ethyl(3-sulfobenzyl)amino]phenyl}{4-[(N-ethyl(3-sulfobenzyl)imino]-2,5-cyclohexadien-1-ylidene}methyl)benzenesulfonic acid, and has a solubility in water of greater than 20 wt% (25 °C).

[0219] Thus, in another embodiment, the reagent according to the present invention is characterized in that it comprises at least one direct dye (a2) selected from the group consisting of: Acid Yellow 1, Acid Yellow 3, Acid Yellow 9, Acid Yellow 17, Acid Yellow 23, Acid Yellow 36, Acid Yellow 121, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Orange 11, Acid Orange 15, Acid Orange 20, Acid Orange 24, Acid Red 14, Acid Red 27, Acid Red 33, Acid Red 35, Acid Red 51, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 92, Acid Red 95, Acid Red 184, Acid Red 195, Acid Violet 43, Acid Violet 49, Acid Violet 50, Acid Blue 1, Acid Blue 3, Acid Blue 7, Acid Blue 104, Acid Blue 9, Acid Blue 62, Acid Blue 74, Acid Blue 80, Acid Green 3, Acid Green 5, Acid Green 9, Acid Green 22, Acid Green 25, Acid Green 50, Acid Black 1, Acid Black 52, Food Yellow 8, Food Blue 5, D&C Yellow 8, D&C Green 5, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2 and / or D&C Brown 1.

[0220] One or more direct dyes can be used in different amounts in the medium depending on the desired color intensity. Particularly good results are obtained when the reagent contains, based on the total weight of the reagent, from 0.01 to 10.0% by weight, preferably from 0.1 to 8.0% by weight, more preferably from 0.2 to 6.0% by weight and most preferably from 0.5 to 4.5% by weight of one or more direct dyes (a2).

[0221] In addition, the composition may also contain at least one photochromic dye or thermochromic dye as the coloring compound (a2).

[0222] Photochromic dyes are dyes that respond to the irradiation of ultraviolet light (sunlight or black light) and undergo a reversible change in hue. In this process, ultraviolet light changes the chemical structure of the dye, thus changing their absorption behavior (photochromism).

[0223] Thermochromic dyes are dyes that respond to temperature changes and undergo a reversible change in hue. In this process, the temperature change changes the chemical structure of the dye, thus changing their absorption behavior (thermochromism).

[0224] Based on the total weight of the reagent, the reagent may contain from 0.01 to 10.0% by weight, preferably from 0.1 to 8.0% by weight, more preferably from 0.2 to 6.0% by weight and most preferably from 0.5 to 4.5% by weight of one or more photochromic dyes (a2).

[0225] Preservative (a3)

[0226] As a third essential ingredient, the composition according to the invention contains at least one preservative (a3). Surprisingly, it has been found that substances commonly used for preservation in the reagents according to the invention result in improved washability of the staining results.

[0227] The term preservative is a general term for substances added to cosmetic preparations to extend their shelf life against the action of microorganisms, insects and other small organisms.

[0228] The preservative (a3) in the sense of the present invention is a substance whose use in the reagent according to the invention has passed the preservative load test according to Ph.Eur. (European Pharmacopoeia), 6th edition, 5.3.1. The preservative load test is carried out as follows.

[0229] 105 colony forming units (CFU) / 1 g of each of the following test microorganisms are inoculated into 30 g of the reagent according to the invention to be tested: Pseudomonas aeruginosa (bacteria), Staphylococcus aureus (bacteria), Candida albicans (fungi), Aspergillus brasiliensis (fungi). After adding the respective microorganisms, the samples are homogenized by stirring with a glass rod and then stored in the dark at 20 to 25 °C. After 7, 14, 21 or 28 days of storage of the inoculated composition, 1 g of each sample is taken and the CFU contained therein is determined. The purpose of the storage is to reduce the CFU to a value below the detection limit (for each added microorganism). If the CFU is below the detection limit after 28 days at the latest, the preservative test is considered passed.

[0230] When the preservative (a3) is selected from the group consisting of the following, a particularly significant improvement in wash fastness is observed: 2-phenoxyethanol, methyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate, benzyl alcohol, 1-phenoxy-propan-2-ol, isopropyl alcohol, ethanol, zinc pyrithione, benzoic acid, salicylic acid, sorbic acid, formic acid, propionic acid, 2-hydroxybiphenyl, 4-hydroxybenzoic acid, dehydroacetic acid, dibromohexamidine, 10-undecenoic acid, hexetidinum, triclocarban, triclosan, 4-chloro-3,4-dimethylphenol, imidazolidinyl urea, hexamethylenetetramine, 1-(4-chlorophenoxy)-1-(imidazol-1-yl)-3,3-dimethyl-2-butanone, 1,3-bis(hydroxymethyl)-5,5-dimethyl-2,4-imidazolidinedione, 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone, bromochlorophene, 3-methyl-4-(1-methylethyl)phenol, 5-chloro-2-methyl-3(2H)-isothiazolone, 2-benzyl-4-chlorophenol, 2-chloroacetamide, chlorhexidine, 4,4-dimethyl-1,3-oxazolidine, 1-phenoxy-propan-2-ol, hexamidinum, 5-ethyl-1-aza-3,7-dioxabicyclo-[3.3.0]-octane, chlorphenesin, sodium hydroxymethylglycinate, benzyl hemiformal, 3-iodo-2-propynyl butylcarbamate, methylisothiazolinone, and ethyl lauroyl arginate.

[0231] In the case of other embodiments, the very particularly preferred reagent is characterized in that it comprises at least one preservative (a3) selected from the group consisting of: 2-phenoxyethanol, methyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate, benzyl alcohol, 1-phenoxy-propan-2-ol, isopropyl alcohol, ethanol, zinc pyrithione, benzoic acid, salicylic acid, sorbic acid, formic acid, propionic acid, 2-hydroxybiphenyl, 4-hydroxybenzoic acid, dehydroacetic acid, dibromohexamidine, 10-undecenoic acid, hexetidinum, trichlorocarban, triclosan, 4-chloro-3,4-dimethylphenol, imidazolidinyl urea, hexamethylenetetramine, 1-(4-chlorophenoxy)-1-(imidazol-1-yl)-3,3-dimethyl-2-butanone, 1,3-bis(hydroxymethyl)-5,5-dimethyl-2,4-imidazolidinedione, 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone, bromochlorophene, 3-methyl-4-(1-methylethyl)phenol, 5-chloro-2-methyl-3(2H)-isothiazolone, 2-benzyl-4-chlorophenol, 2-chloroacetamide, chlorhexidine, 4,4-dimethyl-1,3-oxazolidine, 1-phenoxy-propan-2-ol, hexamidinum, 5-ethyl-1-aza-3,7-dioxabicyclo[3.3.0]octane, chlorphenesin, sodium hydroxymethylglycinate, benzyl hemiformal, 3-iodo-2-propynyl butylcarbamate, methylisothiazolinone and ethyl lauroyl arginate.

[0232] 2-Phenoxyethanol is an ether of phenol and ethylene glycol, with the molecular formula C8H 10 O2. The CAS number of 2-phenoxyethanol is 122-99-6.

[0233] Methyl 4-hydroxybenzoate or methyl p-hydroxybenzoate is the methyl ester of the aromatic carboxylic acid 4-hydroxybenzoic acid and belongs to the p-hydroxybenzoate esters. The CAS number of methyl 4-hydroxybenzoate is 99-76-3.

[0234] Propyl 4-hydroxybenzoate or propyl p-hydroxybenzoate is the propyl ester of the aromatic carboxylic acid 4-hydroxybenzoic acid and belongs to the p-hydroxybenzoate esters. The CAS number of propyl 4-hydroxybenzoate is 94-13-3.

[0235] Benzyl alcohol is also known as phenylmethanol and has a CAS number of 100-51-6.

[0236] Another name for 1-phenoxy-propan-2-ol is 1-phenoxy-2-propanol and phenoxyisopropanol. The CAS number of 1-phenoxy-propan-2-ol is 770-35-4.

[0237] Isopropyl alcohol is also known as 2-propanol and has a CAS number of 67-63-0.

[0238] The CAS number of ethanol is 64-17-5.

[0239] Zinc pyrithione is also known as bis[2-pyridinethiolato]-N,N'-dioxozinc, 2-pyridinethiol 1-oxide, zinc salt or 2-mercaptopyridine N-oxide zinc. The CAS number of zinc pyrithione is 13463-41-7.

[0240] The CAS number of benzoic acid is 65-85-0.

[0241] Salicylic acid is also known as 2-hydroxybenzoic acid and its CAS number is 69-72-7.

[0242] Sorbic acid has the alias 2,4-hexadienoic acid ((2E,4E)-hexa-2,4-dienoic acid) and its CAS number is 110-44-1. The salts of sorbic acid, especially the sodium and potassium salts, are also included in the present invention.

[0243] Formic acid is also known as methanoic acid and its CAS number is 64-18-6.

[0244] Propionic acid is also known as propanoic acid and its CAS number is 79-09-4.

[0245] 2-Hydroxydiphenyl is also known as biphenyl-2-ol or 2-hydroxybiphenyl or o-phenylphenol. The CAS number of 2-hydroxydiphenyl is 90-43-7.

[0246] 4-Hydroxybenzoic acid is also known as p-salicylic acid, p-hydroxybenzoic acid and its CAS number is 99-96-7.

[0247] Dehydroacetic acid has the alias 3-acetyl-6-methyl-2,4(3H)-pyranedione, its CAS number is 520-45-6 and has the structure (K1). The present invention also includes the tautomeric forms of dehydroacetic acid.

[0248]

[0249] Dibromohexamidine is also known as 1,6-bis(4-amidin-2-bromophenoxy)-n-hexane or 4'-(hexane-1,6-diyl)-bis-(3-bromobenzamidine), and its CAS number is 93856-82-7. Dibromohexamidine has the structure (K2).

[0250]

[0251] 10-Undecenoic acid has the alias undec-10-enoic acid or 10-undecenoic acid, and its CAS number is 112-38-9. 10-Undecenoic acid has the structure of formula (K3). The salts of 10-undecenoic acid, especially the sodium and potassium salts, are also included in the present invention.

[0252]

[0253] Hexetidinum, also known as hexetidine or 1,3-bis(2-ethylhexyl)-5-methylhexahydropyrimidin-5-amine. The CAS number of Hexetidinum or hexetidine is 141-94-6. Hexetidinum or hexetidine has a structure of formula (K4).

[0254]

[0255] Triclocarban also has an alias of 3,4,4'-trichlorocarbanilide or 3-(4-chlorophenyl)-1-(3,4-dichlorophenyl)urea, and the CAS number is 101-20-2. Triclocarban has a structure of formula (K5).

[0256]

[0257] Triclosan or triclocarban is also known as 5-chloro-2-(2,4-dichlorophenoxy)phenol. The CAS number of triclosan or triclocarban is 3380-34-5. Triclosan or triclocarban has a structure of formula (K6).

[0258]

[0259] 4-Chloro-3,4-dimethylphenol is also known as chloroxylenol, and the CAS number is 88-04-0.

[0260] Imidazolidinyl urea is also known as N,N'-methylenebis[N'-(3-hydroxymethyl-2,5-dioxo-4-imidazolidinyl)urea]. The CAS number of imidazolidinyl urea is 39236-46-9 and it has a structure of formula (K7).

[0261]

[0262] Hexamethylenetetramine is also known as urotropin or 1,3,5,7-tetraazatricyclo[3.3.1.13,7]decane. The CAS number of hexamethylenetetramine is 100-97-0.

[0263] 1-(4-Chlorophenoxy)-1-(imidazol-1-yl)-3,3-dimethyl-2-butanone is also known as clotrimazole, and the CAS number is 38083-17-9. It has a structure of formula (K8). Structure K8 includes two enantiomeric forms. Both enantiomers and mixtures of both enantiomers are included in the present invention.

[0264]

[0265] 1,3 - Bis-(hydroxymethyl)-5,5-dimethyl-2,4-imidazolidinedione, also known as DMDM hydantoin, has the CAS number 6440-58-0 and has the structure of formula (K9).

[0266]

[0267] 1-Hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone has the aliases 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)pyridin-2(1H)-one, octopirox, and pyrithione ethanolamine salt, and has the CAS number 68890-66-4. Particularly preferably, the preservative is used in the form of its 1:1 adduct with 2-aminoethanol. 1-Hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone (in the form of its ethanolamine adduct) has the structure of formula (K10).

[0268]

[0269] Bromochlorophene has the alias 2,2'-methylenebis-(6-bromo-4-chlorophenol) and has the CAS number 15435-29-7. Bromochlorophene has the structure of formula (K11).

[0270]

[0271] 3-Methyl-4-(1-methylethyl)phenol has the aliases o-cymen-5-ol, p-cymene-3-ol, biosol, and 1-hydroxy-3-methyl-4-isopropylbenzene, and has the CAS number 3228-02-2.

[0272] 5-Chloro-2-methyl-3(2H)-isothiazolone, also known as 5-chloro-2-methyl-4-isothiazolin-3-one or chloromethyl isothiazolone, has the CAS number 26172-55-4 and has the structure of formula (K12).

[0273]

[0274] 2-Benzyl-4-chlorophenol, also known as chlorophenum or chlorophene, has the CAS number 120-32-1.

[0275] 2-Chloroacetamide has the alias chloroacetic acid amide and has the CAS number 79-07-02.

[0276] Chlorhexidine, also known as 1,1'-hexamethylenebis[5-(4-chlorophenyl)biguanide], has the CAS number 55-56-1. Chlorhexidine has the structure of formula (K13).

[0277]

[0278] The CAS number of 4,4-dimethyl-1,3-oxazolidine is 51200-87-4.

[0279] 1-Phenoxy-propan-2-ol is also known as phenyl-β-hydroxypropyl ether, 1-phenoxy-2-propanol, phenoxyisopropyl alcohol, propylene phenoxylethanol, 2-phenoxy-1-methylethanol or propylene glycol 1-phenyl ether, and its CAS number is 770-35-4.

[0280] Hexamidine or 1,6-bis(4-guanidinophenoxy)-n-hexane or 4,4'-[hexane-1,6-diylbis(oxy)]dibenzimidamide, with a CAS number of 3811-75-4.

[0281] Hexamidine has the structure of formula (K14).

[0282]

[0283] 5-Ethyl-1-aza-3,7-dioxabicyclo-[3.3.0]-octane is also known as 5-ethyl-3,7-dioxa-1-azabicyclo-[3.3.0]octane or dihydro-7a-ethyloxazolo[3,4-c]oxazole, with a CAS number of 7747-35-5 and has the structure of formula (K15)

[0284]

[0285] Chlorophenyl glycerol ether is also known as (3-(4-chlorophenoxy)-2-hydroxypropyl) carbamate, with a CAS number of 886-74-8. Chlorophenyl glycerol ether has the structure of formula (K16).

[0286]

[0287] Sodium hydroxymethylglycinate is also known as sodium N-(hydroxymethyl)glycinate or sodium N-(hydroxymethyl)glycinate, with a CAS number of 70161-44-3 and has the structure of formula (K17)

[0288]

[0289] Benzyl hemiformal is also known as (benzyloxy)methanol, with a CAS number of 14548-60-8.

[0290] 3-Iodo-2-propynyl butyl carbamate is also known as 3-iodopropynyl-N-butylcarbamate or biodocarb, with a CAS number of 55406-53-6. 3-Iodo-2-propynyl butyl carbamate has the structure of formula (K18).

[0291]

[0292] Methylisothiazolinone is also known as 2-methyl-2H-isothiazol-3-one, and its CAS number is 2682-20-4.

[0293] Ethyl lauroyl arginate is also known as Na-dodecanoyl-L-arginine ethyl ester hydrochloride or the monohydrochloride of L-arginine or Na-lauroyl ethyl ester, and its CAS number is 60372-77-2. Ethyl lauroyl arginate has the structure of formula (K19) and can be used as a free compound or in the form of its hydrochloride salt.

[0294]

[0295] The best results are obtained when phenoxyethanol and / or methyl 4-hydroxybenzoate are used as preservative (a3), because the use of two preservatives has obtained a particularly strong improvement in wash fastness.

[0296] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains (a3) 2-phenoxyethanol and / or methyl 4-hydroxybenzoate.

[0297] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains (a3) 2-phenoxyethanol.

[0298] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains (a3) methyl 4-hydroxybenzoate.

[0299] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains (a3) 2-phenoxyethanol and / or methyl 4-hydroxybenzoate.

[0300] In the reagent according to the invention, it is also preferred to use preservative (a3) in a certain range of amounts.

[0301] Particularly good results are obtained when the reagent contains a total of 0.01 to 5.0% by weight, preferably 0.1 to 2.5% by weight, more preferably 0.15 to 1.0% by weight and most preferably 0.2 to 0.8% by weight of one or more preservatives (a3) based on the total weight of the reagent.

[0302] In a further preferred embodiment, the reagent according to the invention is characterized in that it contains a total of 0.01 to 5.0% by weight, preferably 0.1 to 2.5% by weight, more preferably 0.15 to 1.0% by weight and very particularly preferably 0.2 to 0.8% by weight of one or more preservatives (a3) based on the total weight of the reagent.

[0303] In the reagent according to the invention, 2-phenoxyethanol is also preferably used in a certain range of amounts. It has been found that it is particularly advantageous if the reagent contains 0.1 to 1.0% by weight, preferably 0.2 to 1.0% by weight, more preferably 0.3 to 0.9% and most preferably 0.4 to 0.8% by weight of 2-phenoxyethanol, based on the total weight of the reagent.

[0304] In the reagent according to the invention, methyl 4-hydroxybenzoate is also preferably used in a certain range of amounts. It has been found that it is particularly advantageous if the reagent contains 0.1 to 0.4% by weight of methyl 4-hydroxybenzoate, based on the total weight of the reagent.

[0305] Non-ionic surfactant (a4)

[0306] As an essential fourth component (a4) of the present invention, the reagent according to the invention contains at least one non-ionic surfactant selected from the group consisting of addition products of ethylene oxide and C8-C 24 fatty alcohols.

[0307] The addition of ethylene oxide and C2-C 24 fatty alcohols results in the formation of ethoxylated C2-C 24 fatty alcohols. In this case, the ethoxy group is the structural unit -CH2-CH2-O-, which can also be referred to as an ethylene oxide unit.

[0308] The molar amount of ethylene oxide used per mole of fatty alcohol represents the degree of ethoxylation.

[0309] Low ethoxylated fatty alcohols are, for example, fatty alcohols that have been ethoxylated with at least 1 and at most 25 ethoxy groups (EO groups). In this case, the ethoxy group is also the structural unit -CH2-CH2-O-, which can also be referred to as an ethylene oxide unit.

[0310] Highly ethoxylated fatty alcohols are similarly understood as C8-C 24 fatty alcohols that have been ethoxylated with at least 25 and at most 100 ethoxy groups (i.e., 30 moles to 100 moles of ethylene oxide per mole of fatty alcohol).

[0311] In other words, a first object of the present invention is a reagent for coloring keratin materials, in particular human hair, which contains

[0312] (a1) at least one amino-functionalized polysiloxane polymer, and

[0313] (a2) at least one color-imparting compound, and

[0314] (a3) at least one preservative, and

[0315] (a4) At least one nonionic surfactant selected from the group of ethoxylated C8-C fatty alcohols having from 1 to 100 ethoxy groups. 24 Fatty alcohol group.

[0316] According to the present invention, C8-C 24 Fatty alcohols are straight-chain or branched, saturated or unsaturated alkanols having 8 to 24 carbon atoms. Unsaturated C 16 -C 18 Fatty alcohols can be mono-unsaturated or poly-unsaturated. In the case of unsaturated fatty alcohols, one or more of their C-C double bonds can have a cis or trans configuration. According to the present invention, mixtures of fatty alcohols obtained by selective mixing or also by recycling methods can also be used. An example is cetearyl alcohol (C 16 - and C 18 1:1 mixture of fatty alcohols).

[0317] Suitable ethoxylated fatty alcohols (a4) can include, for example, cetearyl alcohol polyether-2, stearyl alcohol polyether-2, cetyl alcohol polyether-2, oleyl alcohol polyether-2, cetearyl alcohol polyether-3, stearyl alcohol polyether-3, cetyl alcohol polyether-3, oleyl alcohol polyether-3, cetearyl alcohol polyether-4, stearyl alcohol polyether-4, cetyl alcohol polyether-4, oleyl alcohol polyether-4, cetearyl alcohol polyether-5, stearyl alcohol polyether-5, cetyl alcohol polyether-5 and / or oleyl alcohol polyether-5, cetearyl alcohol polyether-30, stearyl alcohol polyether-30, cetyl alcohol polyether-30, oleyl alcohol polyether-30, cetearyl alcohol polyether-50, stearyl alcohol polyether-50, cetyl alcohol polyether-50, oleyl alcohol polyether-50, cetearyl alcohol polyether-100, stearyl alcohol polyether-100, cetyl alcohol polyether-100 and oleyl alcohol polyether-100.

[0318] When the reagent according to the present invention contains at least one ethoxylated fatty alcohol having an ethoxylation degree of 80 to 120, a particularly strong improvement in wash fastness is obtained.

[0319] In another very particularly preferred embodiment, the reagent according to the present invention is characterized in that it contains at least one nonionic surfactant (a4) of formula (T-1).

[0320]

[0321] Where

[0322] Ra is a saturated or unsaturated, unbranched or branched C8-C 24 Alkyl group, preferably a saturated unbranched C 16 -C 18 Alkyl group, and

[0323] n is an integer from 80 to 120, preferably an integer from 90 to 110, and particularly preferably the number 100.

[0324] A particularly suitable non-ionic surfactant of this type has the trade name Brij S100 or Brij S100PASG. This is stearyl alcohol ethoxylated with 100 EO units, commercially available from Croda, with a CAS number of 9005-00-9.

[0325] Furthermore, particularly good results are obtained when using a reagent according to the invention containing at least one ethoxylated fatty alcohol with an ethoxylation degree of 10 to 40.

[0326] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains at least one non-ionic surfactant (a4) of formula (T-II),

[0327]

[0328] where

[0329] Rb represents a saturated or unsaturated, unbranched or branched C8-C 24 alkyl group, preferably a saturated unbranched C 16 -C 18 alkyl group, and

[0330] m is an integer from 10 to 40, preferably an integer from 20 to 35, and particularly preferably the number 30.

[0331] A particularly suitable non-ionic surfactant of this type is cetostearyl alcohol polyether-30. Cetostearyl alcohol polyether-30 is a mixture of cetyl alcohol and stearyl alcohol each ethoxylated with 30 ethylene oxide units. The mixture of cetyl alcohol and stearyl alcohol is called cetostearyl alcohol. The CAS number of cetostearyl alcohol polyether-30 is 68439-49-6 and it can be purchased, for example, from BASF under the trade name Eumulgin B3.

[0332] It has been found that it is very preferred if the reagent contains simultaneously at least one non-ionic surfactant of formula (T-I) and at least one non-ionic surfactant of formula (T-II).

[0333] If, based on the total weight of the reagent, the reagent contains a total of 0.1 to 20.0% by weight, preferably 0.2 to 10.0% by weight, more preferably 0.5 to 8.0% by weight, even more preferably 1.0 to 6.0% by weight and very particularly preferably 1.2 to 4.0% by weight of one or more non-ionic surfactants (a4) selected from the group consisting of addition products of ethylene oxide and C8-C 24 fatty alcohols, then it is very particularly preferred.

[0334] Fatty component in the reagent

[0335] As a further optional ingredient, the reagent according to the invention may additionally contain at least one fatty component.

[0336] It has been found that the use of at least one fatty component results in the reagent being in the form of an emulsion which has an optimal viscosity and has also been found to be beneficial in terms of improving the color intensity.

[0337] The fatty component is a hydrophobic substance which forms an emulsion and a micellar system in the presence of water. Without being bound by this theory, it is assumed that C1-C6 alkoxysilanes - whether in their monomeric form or in the form of their possible condensed oligomers - are incorporated into this hydrophobic environment or micellar system, and thus the polarity of their environment is altered. Due to the hydrophobic nature of the fatty component, the environment of the C1-C6 alkoxysilanes is also hydrophobized. It is assumed that the polymerization reaction of the C1-C6 alkoxysilanes leading to the film or coating takes place at a reduced rate in an environment with a reduced polarity.

[0338] For the purposes of the present invention, "fatty component" means an organic compound which has a solubility in water of less than 1% by weight, preferably less than 0.1% by weight, at room temperature (22 °C) and atmospheric pressure (760 mmHg). The definition of the fatty component expressly only covers uncharged (i.e. non-ionic) compounds. The fatty component has at least one saturated or unsaturated alkyl group having at least 12 C atoms. The fatty component has a molecular weight of at most 5000 g / mol, preferably at most 2500 g / mol and particularly preferably at most 1000 g / mol. The fatty component is neither a polyoxyalkylated nor a polyglycerolated compound.

[0339] Very preferably, the fatty component (a4) contained in the composition is selected from the group consisting of C 12 -C 30 fatty alcohols, C 12 -C 30 fatty acid triglycerides, C 12 -C 30 fatty acid monoglycerides, C 12 -C 30 fatty acid diglycerides and / or hydrocarbons.

[0340] In the case of a further preferred embodiment, the reagent according to the invention is characterized in that it contains one or more selected from the group consisting of C 12 -C 30 fatty alcohols, C 12 -C 30 fatty acid triglycerides, C 12 -C 30 fatty acid monoglycerides, C 12 -C 30A fatty component of the group consisting of diglycerides of fatty acids and / or hydrocarbons.

[0341] In the present context, very particularly preferred fatty components are to be understood as being selected from C 12 -C 30 fatty alcohols, C 12 -C 30 triglycerides of fatty acids, C 12 -C 30 monoglycerides of fatty acids, C 12 -C 30 components of the group consisting of diglycerides of fatty acids and / or hydrocarbons. For the purposes of the present invention, only non-ionic substances are explicitly regarded as fatty components. Charged compounds such as fatty acids and their salts are not regarded as fatty components.

[0342] C 12 -C 30 The fatty alcohols can be saturated, mono- or polyunsaturated, straight-chain or branched fatty alcohols having 12 - 30 C atoms.

[0343] Preferred straight-chain, saturated C 12 -C 30 Examples of fatty alcohols are dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), eicosanol (eicosan-1-ol), heneicosanol (heneicosan-1-ol) and / or behenyl alcohol (docosan-1-ol).

[0344] Preferred straight-chain unsaturated fatty alcohols are (9Z)-octadec-9-en-1-ol (oleyl alcohol), (9E)-octadec-9-en-1-ol (elaeostearyl alcohol), (9Z,12Z)-octadec-9,12-dien-1-ol (linoleyl alcohol), (9Z,12Z,15Z)-octadec-9,12,15-trien-1-ol (linolenyl alcohol), eicosenol ((9Z)-eicos-9-en-1-ol), arachidol ((5Z,8Z,11Z,14Z)-eicos-5,8,11,14-tetraen-1-ol), brassidyl alcohol ((13Z)-docos-13-en-1-ol) and / or erucyl alcohol ((13E)-docosen-1-ol).

[0345] Preferred representatives of branched fatty alcohols are 2-octyldodecanol, 2-hexyldodecanol and / or 2-butyldodecanol.

[0346] In another preferred embodiment, the reagent according to the invention is characterized in that it comprises one or more C selected from the group consisting of the following 12 -C 30Fatty alcohols: dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), eicosanol (eicosan-1-ol), heneicosanol (heneicosan-1-ol), behenyl alcohol (docosan-1-ol), (9Z)-octadec-9-en-1-ol (oleyl alcohol), (9E)-octadec-9-en-1-ol (elaeostearyl alcohol), (9Z,12Z)-octadeca-9,12-dien-1-ol (linoleyl alcohol), (9Z,12Z,15Z)-octadeca-9,12,15-trien-1-ol (linolenyl alcohol), eicosenol ((9Z)-eicosen-9-en-1-ol), arachidol ((5Z,8Z,11Z,14Z)-eicosa-5,8,11,14-tetraen-1-ol), brassidyl alcohol ((13Z)-docos-13-en-1-ol), erucyl alcohol ((13E)-docosen-1-ol), 2-octyldodecanol, 2-hexyldodecanol and / or 2-butyldodecanol.

[0347] It has been found that it is highly preferred to use one or more C 12 -C 30 fatty alcohols in quite specific amounts.

[0348] If, based on the total weight of the reagent, the reagent contains a total amount of 2.0 to 50.0% by weight, preferably 3.0 to 30.0% by weight, more preferably 4.0 to 20.0% by weight, still more preferably 5.0 to 15.0% by weight and most preferably 5.0 to 10.0% by weight of one or more C 12 -C 30 fatty alcohols, it is particularly preferred.

[0349] In addition, as a perfectly suitable fatty component, the reagent may also contain at least one C 12 -C 30 triglyceride of fatty acid, which is a C 12 -C 30 monoglyceride of fatty acid and / or C 12 -C 30 diglyceride of fatty acid. For the purposes of the present invention, C 12 -C 30 triglyceride of fatty acid is understood to be the triester of the trihydric alcohol glycerol with three equivalents of fatty acid. Fatty acids that are the same or different within the triglyceride molecule can participate in the formation of the ester.

[0350] According to the present invention, fatty acids are to be understood as saturated or unsaturated, unbranched or branched, unsubstituted or substituted C 12 -C 30Carboxylic acids. Unsaturated fatty acids can be mono- or polyunsaturated. For unsaturated fatty acids, one or more of their C-C double bonds can have a cis or trans configuration.

[0351] Fatty acid triglycerides, wherein at least one ester group is formed by glycerol and a fatty acid selected from the group consisting of: dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z,12Z)-octadeca-9,12-dienoic acid], linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid], eleostearic acid [(9Z,11E,13E)-octadeca-9,11,13-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-eicosa-5,8,11,14-tetraenoic acid], and / or nervonic acid [(15Z)-tetracos-15-enoic acid], are particularly suitable.

[0352] The fatty acid triglycerides can also be of natural origin. Fatty acid triglycerides or mixtures thereof present in soybean oil, peanut oil, olive oil, sunflower oil, macadamia nut oil, moringa oil, almond oil, pistachio nut oil, and / or optionally hydrogenated castor oil are particularly suitable for use in the products according to the invention.

[0353] C 12 -C 30 Fatty acid monoglycerides are understood as monoesters of the triol glycerol with one equivalent of fatty acid. Either the middle hydroxyl group of glycerol or the terminal hydroxyl group of glycerol can be esterified with the fatty acid.

[0354] C 12 -C 30A monoglyceride of a fatty acid, in which the hydroxyl groups of glycerol are esterified by a fatty acid selected from dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z,12Z)-octadec-9,12-dienoic acid, linolenic acid [(9Z,12Z,15Z)-octadec-9,12,15-trienoic acid], eleostearic acid [(9Z,11E,13E)-octadec-9,11,13-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-eicos-5,8,11,14-tetraenoic acid], or nervonic acid [(15Z)-tetracos-15-enoic acid], is particularly suitable.

[0355] C 12 -C 30 A diglyceride of a fatty acid is understood as a diester of the trihydric alcohol glycerol with two equivalents of a fatty acid. The middle and one terminal hydroxyl group of glycerol can be esterified with two equivalents of a fatty acid, or the two terminal hydroxyl groups of glycerol can each be esterified with one fatty acid. Glycerol can be esterified with two fatty acids of the same structure or two different fatty acids.

[0356] A triglyceride of a fatty acid, in which at least one ester group is formed by glycerol with a fatty acid selected from: dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z,12Z)-octadec-9,12-dienoic acid, linolenic acid [(9Z,12Z,15Z)-octadec-9,12,15-trienoic acid], eleostearic acid [(9Z,11E,13E)-octadec-9,11,13-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-eicos-5,8,11,14-tetraenoic acid], and / or nervonic acid [(15Z)-tetracos-15-enoic acid], is particularly suitable.

[0357] When composition (B) contains at least one C selected from monoesters of glycerol with one equivalent of a fatty acid 12 -C 30When the monoglyceride of fatty acid is used, the fatty acid is selected from the group consisting of: dodecanoic acid (lauric acid), myristic acid, palmitic acid, lignoceric acid, stearic acid, arachidic acid, behenic acid, petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z,12Z)-octadeca-9,12-dienoic acid], linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid], eleostearic acid [(9Z,11E,13E)-octadeca-9,11,13-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-eicosatetraenoic acid], and / or nervonic acid [(15Z)-tetracos-15-enoic acid], and particularly good results are obtained.

[0358] In the case of other embodiments, the reagent according to the invention is characterized in that it comprises at least one C selected from the monoesters of glycerol with one equivalent of fatty acid 12 -C 30 monoglyceride of fatty acid, wherein the fatty acid is selected from the group consisting of dodecanoic acid, myristic acid, palmitic acid, lignoceric acid, stearic acid, arachidic acid and / or behenic acid.

[0359] It has been found that it is preferred to use a very specific range of amounts of one or more C 12 -C 30 monoglyceride of fatty acid, C 12 -C 30 diglyceride of fatty acid and / or C 12 -C 30 triglyceride of fatty acid in the reagent.

[0360] Regarding the solution to the task according to the invention, it has been proven that if, based on the total weight of the reagent, the reagent contains a total amount of 0.1 to 20.0% by weight, preferably 0.3 to 15.0% by weight, more preferably 0.5 to 10.0% by weight and most preferably 0.8 to 5.0% by weight of one or more C 12 -C 30 monoglyceride of fatty alcohol, C 12 -C 30 diglyceride of fatty alcohol and / or C 12 -C 30 triglyceride of fatty alcohol, it is advantageous.

[0361] In a very particularly preferred embodiment, the method according to the invention is characterized in that, based on the total weight of the reagent, the reagent contains a total amount of 0.1 to 20.0% by weight, preferably 0.3 to 15.0% by weight, more preferably 0.5 to 10.0% by weight and very particularly preferably 0.8 to 5.0% by weight of one or more C 12 -C 30 fatty alcohol glycerol monoesters, C 12 -C 30 fatty alcohol glycerol diesters and / or C 12 -C 30 fatty alcohol glycerol triesters.

[0362] C 12 -C 30 fatty acid glycerol monoesters, C 12 -C 30 fatty acid glycerol diesters and / or C 12 -C 30 fatty acid glycerol triesters can be used as the sole fatty component in the reagent. However, introducing at least one C 12 -C 30 fatty acid glycerol monoesters, C 12 -C 30 fatty acid glycerol diesters and / or C 12 -C 30 fatty acid glycerol triesters in combination with at least one C 12 -C 30 fatty alcohol into the reagent can also be suitable according to the invention.

[0363] Furthermore, as a very particularly preferred fatty component, the composition can also contain at least one hydrocarbon.

[0364] Hydrocarbons are compounds consisting only of carbon and hydrogen atoms and having 8 to 80 carbon atoms. In the present context, aliphatic hydrocarbons such as mineral oil, liquid paraffin oil (e.g., liquid paraffin or Paraffinum Perliquidum), isoparaffin oil, semi-solid paraffin oil, paraffin wax, hard paraffin (paraffin wax solid), petrolatum and polydecene are particularly preferred.

[0365] In the present context, liquid paraffin oil (Paraffinum Liquidum and Paraffinum Perliquidum) has proven to be particularly suitable. Paraffinum Liquidum, also known as white oil, is the preferred hydrocarbon. Paraffinum Liquidum is a mixture of purified saturated aliphatic hydrocarbons mainly consisting of hydrocarbon chains with a C-chain distribution having 25 to 35 carbon atoms.

[0366] Very good results are obtained when the reagent contains at least one hydrocarbon selected from the group consisting of mineral oil, liquid paraffin, isoparaffin oil, semi-solid paraffin, paraffin wax, hard paraffin (paraffin solid), petrolatum, and polydecene.

[0367] In a very particularly preferred embodiment, the reagent according to the invention is characterized in that it contains at least one fatty component selected from the group of hydrocarbons.

[0368] Regarding the solution to the problem according to the invention, it has been found that it is very particularly preferred if the reagent contains, based on the total weight of the reagent, one or more hydrocarbons in a total amount of 0.5 to 20.0% by weight, preferably 0.7 to 10.0% by weight, more preferably 0.9 to 5.0% by weight, and very particularly preferably 1.0 to 4.0% by weight.

[0369] In a very particularly preferred embodiment, the reagent according to the invention is characterized in that, based on the total weight of the reagent, it contains one or more hydrocarbons in a total amount of 0.5 to 20.0% by weight, preferably 0.7 to 10.0% by weight, more preferably 0.9 to 5.0% by weight, and very particularly preferably 1.0 to 4.0% by weight.

[0370] One or more hydrocarbons can be used as the sole fatty component (a4) in the reagent. However, according to the invention, at least one hydrocarbon can also be introduced into the reagent in combination with at least one other component.

[0371] Very preferably, the reagent contains at least one fatty component (a4) selected from the group of C 12 -C 30 fatty alcohols and at least one other fatty component selected from the group of hydrocarbons.

[0372] Water content in the reagent

[0373] The reagent described above is a ready-to-use reagent that can be applied to keratin materials. This ready-to-use reagent preferably has a high water content. It has been found that those reagents containing 50.0 to 98.0% by weight, preferably 60.0 to 90.0% by weight, more preferably 70.0 to 90.0% by weight, and most preferably 75.0 to 90.0% by weight of water, based on the total weight of the reagent, are particularly suitable reagents.

[0374] In another clearly very particularly preferred embodiment, the reagent according to the invention is characterized in that, based on the total weight of the reagent, it contains 50.0 to 98.0% by weight, preferably 60.0 to 90.0% by weight, further preferably 70.0 to 90.0% by weight, and very particularly preferably 75.0 to 90.0% by weight of water.

[0375] Other optionally present components in the reagent

[0376] In addition to the components (a1) to (a4) essential to the present invention that have been described, the reagent may also contain other optionally present components.

[0377] For example, the reagent may contain a film-forming polymer. The film-forming polymer may be selected, for example, from the group consisting of polyvinylpyrrolidone (PVP), vinylpyrrolidone / vinyl acetate copolymer, vinylpyrrolidone / styrene copolymer, vinylpyrrolidone / ethylene copolymer, vinylpyrrolidone / propylene copolymer, vinylpyrrolidone / vinylcaprolactam copolymer, vinylpyrrolidone / vinylformamide copolymer, and / or vinylpyrrolidone / vinyl alcohol copolymer, and very particularly preferably polyvinylpyrrolidone (PVP).

[0378] Other suitable film-forming polymers may be selected from acrylic copolymers, methacrylic copolymers, homopolymers or copolymers of acrylates, homopolymers or copolymers of methacrylates, homopolymers or copolymers of acrylamides, homopolymers or copolymers of methacrylamides, copolymers of vinylpyrrolidone, copolymers of vinyl alcohol, copolymers of vinyl acetate, homopolymers or copolymers of ethylene, homopolymers or copolymers of propylene, homopolymers or copolymers of styrene, polyurethanes, polyesters, and / or polyamides.

[0379] Film-forming polymers selected from the group consisting of synthetic polymers, polymers obtainable by free radical polymerization, or natural polymers have proven to be very suitable.

[0380] Other particularly suitable film-forming polymers may be selected from homopolymers or copolymers of olefins, such as cycloolefins, butadiene, isoprene or styrene, vinyl ethers, vinyl amides, having at least one C1-C 20 alkyl, aryl or C2-C 10 esters or amides of (meth)acrylic acid with hydroxyalkyl.

[0381] Other film-forming polymers may be selected from homopolymers or copolymers of the following compounds: isooctyl (meth)acrylate; isononyl (meth)acrylate; 2-ethylhexyl (meth)acrylate; lauryl (meth)acrylate; isopentyl (meth)acrylate; n-butyl (meth)acrylate; isobutyl (meth)acrylate; ethyl (meth)acrylate; methyl (meth)acrylate; tert-butyl (meth)acrylate; stearyl (meth)acrylate; 2-hydroxyethyl (meth)acrylate; 2-hydroxypropyl (meth)acrylate; 3-hydroxypropyl (meth)acrylate and / or mixtures thereof.

[0382] Other film-forming polymers may be selected from homopolymers or copolymers of the following compounds: (meth)acrylamide; N-alkyl-(meth)acrylamide, having C2-C 18Those of alkyl groups, such as N-ethyl-acrylamide, N-tert-butyl-acrylamide or N-octyl-acrylamide; N-di(C1-C4)alkyl-(meth)acrylamide.

[0383] Other suitable anionic copolymers include copolymers of acrylic acid, methacrylic acid or their C1-C6 alkyl esters, such as those sold according to the INCI declaration as acrylate copolymers. Suitable commercial products are for example those from Rohm&Haas 33. Copolymers of acrylic acid, methacrylic acid or their C1-C6 alkyl esters and esters of ethylenically unsaturated acids and alkoxylated fatty alcohols are also preferred. Suitable ethylenically unsaturated acids are especially acrylic acid, methacrylic acid and itaconic acid; suitable alkoxylated fatty alcohols are especially steareth-20 or ceteth-20.

[0384] Polymers on the market include those distributed by Rohme und Haas 22 (acrylate / steareth-20 methacrylate copolymer), 28 (acrylate / beheneth-25 methacrylate copolymer), Structure (acrylate / steareth-20 itaconate copolymer), Structure (acrylate / ceteth-20 itaconate copolymer), Structure (acrylate / aminoacrylate C10-30 alkyl PEG-20 itaconate copolymer, 1342, 1382, Ultrez 20, Ultrez 21 (acrylate / C10-30 alkyl acrylate crosslinked polymer), Synthalen W (acrylate / Palmeth-25 acrylate copolymer) or Soltex OPT (acrylate / C12-22 alkyl methacrylate copolymer).

[0385] Homopolymers and copolymers of N-vinylpyrrolidone, vinylcaprolactam, vinyl-(C1-C6)alkyl-pyrrole, vinyl-oxazole, vinyl-thiazole, vinyl-pyrimidine, vinyl-imidazole can be called suitable polymers based on vinyl monomers.

[0386] The copolymer octylacrylamide / acrylates / butylaminoethyl methacrylate copolymer, such as those commercially sold by NATIONALSTARCH under the trade name or 47, or those sold by NATIONALSTARCH under the trade name LT and Acrylate / octylacrylamide copolymers sold are also suitable.

[0387] Suitable olefin-based polymers include homopolymers and copolymers of ethylene, propylene, butene, isoprene, and butadiene.

[0388] In another version, block copolymers can be used as film-forming hydrophobic polymers, which contain at least one block of styrene or a styrene derivative. These block copolymers can be copolymers containing one or more other blocks such as styrene / ethylene, styrene / ethylene / butene, styrene / butene, styrene / isoprene, styrene / butadiene in addition to the styrene block. Such polymers are commercially distributed by BASF under the trade name "Luvitol HSB".

[0389] If in principle anionic, cationic, and / or nonionic polymers can all be used in the reagent according to the present invention, it has been shown to be particularly preferred not to use other ionic compounds or to use them only in small amounts. In other words, when the reagent is mainly a nonionic matrix and thus contains no or only very small amounts of cationic and anionic polymers, a particularly strong improvement in color intensity can be achieved. Therefore, it has been found that it is particularly preferred if the total content of all anionic polymers contained in the reagent is less than 0.1% by weight. In addition, it has been found that it is particularly preferred if the total content of all cationic polymers contained in the reagent is less than 0.1% by weight. The amount of catalytic or anionic polymer is related to the total weight of the reagent.

[0390] In another very particularly preferred embodiment, the reagent according to the present invention is characterized in that, relative to the total weight of the reagent,

[0391] - the total content of all anionic polymers contained in the reagent is less than 0.1% by weight, and

[0392] - the total content of all cationic polymers contained in the reagent is less than 0.1% by weight.

[0393] In addition to the above nonionic surfactants, the reagent can in principle also contain one or more charged surfactants. The term surfactant refers to surface-active substances. Anionic surfactants consisting of a hydrophobic residue and a negatively charged hydrophilic head group, zwitterionic surfactants with a negative charge and a compensating positive charge, cationic surfactants having a positively charged hydrophilic group in addition to the hydrophobic residue, and nonionic surfactants without a charge but having a strong dipole moment and being strongly hydrated in aqueous solution are distinguished.

[0394] Zwitterionic surfactants contain at least one quaternary ammonium group and at least one -COO (-) - or -SO3 (-)Those surface-active compounds of the group. Particularly suitable zwitterionic surfactants are the so-called betaines, such as N-alkyl-N,N-dimethylglycine ammonium, e.g., cocoalkyl-dimethylglycine ammonium, N-acylaminopropyl-N,N-dimethylglycine ammonium, e.g., cocoacylaminopropyldimethylglycine ammonium, and 2-alkyl-3-carboxymethyl-3-hydroxyethylimidazoline having 8 to 18 C atoms each in the alkyl or acyl group, and cocoacylamidoethylhydroxyethylcarboxymethylglycine ester. Preferred zwitterionic surfactants are fatty acid amide derivatives known under the INCI name cocoamidopropyl betaine.

[0395] Amphoteric surfactants are surface-active compounds in which, in addition to the C8-C 24 alkyl or acyl group, there is at least one free amino group and at least one -COOH- or -SO3H group and which can form an inner salt. Examples of suitable amphoteric surfactants are N-alkylglycine, N-alkylpropionic acid, N-alkylaminobutyric acid, N-alkyliminodipropionic acid, N-hydroxyethyl-N-alkylamidopropylglycine, N-alkyltaurine, N-alkylsarcosine, 2-alkylaminopropionic acid and alkylaminoacetic acid, each having about 8 to 24 C atoms in the alkyl group. Typical examples of amphoteric or zwitterionic surfactants are alkyl betaines, alkylamidobetaines, aminopropionates, aminoglycinates, imidazolinium betaines and sulfobetaines.

[0396] Examples of amphoteric surfactants are N-cocoalkylaminopropionate / ester, cocoacylaminoethylaminopropionate / ester and C 12 -C 18 -acylsarcosine.

[0397] In addition, the product can also contain at least one cationic surfactant. Cationic surfactants are surfactants each carrying one or more positive charges, i.e., surface-active compounds. Cationic surfactants contain only positive charges. Generally, these surfactants consist of a hydrophobic part and a hydrophilic head group, the hydrophobic part usually consisting of a hydrocarbon backbone (e.g., consisting of one or two straight or branched alkyl chains), and one or more positive charges being in the hydrophilic head group. Examples of cationic surfactants are

[0398] - quaternary ammonium compounds which can carry one or two alkyl chains with a chain length of 8 to 28 C atoms as the hydrophobic group,

[0399] - quaternary phosphonium salts substituted by one or more alkyl chains with a chain length of 8 to 28 C atoms, or

[0400] - tertiary sulfonium salts.

[0401] In addition, the cationic charge can also be part of a heterocyclic ring in the form of an onium structure (e.g., an imidazolium ring or a pyridinium ring). In addition to the functional unit carrying the cationic charge, the cationic surfactant can also contain other uncharged functional groups, as is the case, for example, with ester quaternary ammonium salts. Based on the total weight of the corresponding reagent, the cationic surfactant is used in a total amount of 0.1 to 45% by weight, preferably 1 to 30% by weight and most preferably 1 to 15% by weight.

[0402] In addition, the reagent according to the invention can also contain at least one anionic surfactant. An anionic surfactant is a surfactant that carries only an anionic charge (neutralized by the corresponding counter cation). Examples of anionic surfactants are fatty acids, alkyl sulfates, alkyl ether sulfates, and ether carboxylic acids having 12 to 20 C atoms in the alkyl group and at most 16 ethylene glycol ether groups in the molecule.

[0403] If in principle anionic, cationic, and / or nonionic surfactants can all be used in the reagent according to the invention, it has proven particularly preferred not to use other ionic compounds or to use them only in small amounts. In other words, when the reagent is mainly a nonionic matrix and thus contains no or only very small amounts of cationic and anionic surfactants, a particularly strong improvement in color intensity can be achieved. Therefore, it has been found that it is particularly preferred when the total content of all anionic surfactants contained in the formulation is less than 0.1% by weight. In addition, it has been found that it is particularly preferred when the total content of all cationic surfactants contained in the reagent is less than 0.1% by weight. The amount of the catalytic or anionic surfactant is related to the total weight of the product.

[0404] In another very particularly preferred embodiment, the reagent according to the invention is characterized in that, relative to the total weight of the reagent,

[0405] - the total content of all anionic surfactants contained in the reagent is less than 0.1% by weight, and

[0406] - the total content of all cationic surfactants contained in the reagent is less than 0.1% by weight.

[0407] The reagent may also contain other active ingredients, auxiliaries and additives, such as solvents, structuring agents such as glucose, maleic acid and lactic acid, hair-conditioning compounds such as phospholipids, for example lecithin and cephalin; perfume oils, dimethyl isosorbide and cyclodextrin; active ingredients for improving the fiber structure, in particular monosaccharides, disaccharides and oligosaccharides, such as glucose, galactose, fructose, levulose and lactose; dyes for coloring the product; antidandruff active ingredients, such as pyrithione ethanolamine salt, zinc omadine and clotrimazole; amino acids and oligopeptides; protein hydrolysates based on animals and / or plants, and in the form of their fatty acid condensation products or optionally anionic or cationic modified derivatives; vegetable oils; light stabilizers and UV blockers; active ingredients such as panthenol, pantothenic acid, pantolactone, allantoin, pyrrolidone carboxylic acid and its salts and bisabolol; polyphenols, in particular hydroxycinnamic acids, 6,7-dihydroxycoumarin, hydroxybenzoic acids, catechins, tannins, leucoanthocyanins, anthocyanins, flavanones, flavones and flavonols; ceramides or pseudoceramides; vitamins, provitamins and vitamin precursors; plant extracts; fats and waxes such as fatty alcohols, beeswax, lignite wax and kerosene; swelling and penetrating agents, such as glycerol, propylene glycol monoethyl ether, carbonates, bicarbonates, guanidine, urea and primary, secondary and tertiary phosphates; opacifying agents such as latex, styrene / PVP and styrene / acrylamide copolymers; pearlescing agents such as ethylene glycol mono- and distearates and PEG-3-distearate; and foaming agents, for example propane-butane mixtures, N2O, dimethyl ether, CO2 and air.

[0408] The selection of these other substances will be made by the expert according to the desired properties of the reagent. Regarding the other optionally present components and the amounts of use of these components, express reference is made to the relevant manuals known to the expert. Based on the total weight of the respective reagent, the additional active ingredients and auxiliary substances are preferably each used in an amount of from 0.0001 to 25% by weight, from 0.0005 to 15% by weight in the formulations according to the invention.

[0409] Reagent pH value

[0410] Preferably, the pH value of the reagent according to the invention is adjusted to a neutral or alkaline pH. Most preferably, the reagent has an alkaline pH value in the range of 7.0 to 11.5, preferably 8.0 to 11.0 and most preferably 8.5 to 10.5. Under alkaline conditions, the amino-functionalized polysiloxane polymer (a1) can be dissolved or dispersed particularly well and is not protonated.

[0411] In a further preferred embodiment, the reagent according to the invention is characterized in that it has a pH of 7.0 to 11.5, preferably 8.0 to 11.0 and particularly preferably 8.5 to 10.5.

[0412] To adjust the desired pH, reagent (a) and / or (b) may contain at least one alkalizing agent. The pH value for the purposes of the present invention is the pH value measured at a temperature of 22 °C.

[0413] As the alkalizing agent, the reagent may contain, for example, ammonia, alkanolamines and / or basic amino acids.

[0414] The alkanolamines useful for the reagents of the present invention are preferably primary amines of C2-C6 alkyl bases having at least one hydroxyl group. Preferred alkanolamines are selected from the group formed by: 2-aminoethan-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropan-1,2-diol, 2-amino-2-methylpropan-1,3-diol.

[0415] Particularly preferred alkanolamines according to the present invention are selected from 2-aminoethan-1-ol and / or 2-amino-2-methylpropan-1-ol. Thus, a particularly preferred embodiment is characterized in that the reagent according to the present invention contains an alkanolamine selected from 2-aminoethan-1-ol and / or 2-amino-2-methylpropan-1-ol as the alkalizing agent.

[0416] For the purposes of the present invention, an amino acid is an organic compound containing at least one protonatable amino group and at least one -COOH or -SO3H group in its structure. Preferred amino acids are aminocarboxylic acids, especially α-(alpha)-aminocarboxylic acids and ω-aminocarboxylic acids, with α-aminocarboxylic acids being particularly preferred.

[0417] According to the present invention, basic amino acids are those amino acids with an isoelectric point pI greater than 7.0.

[0418] Basic α-aminocarboxylic acids contain at least one asymmetric carbon atom. In the context of the present invention, the two possible enantiomers can equally be used as the specific compound or a mixture thereof, especially as a racemate. However, it is particularly advantageous to use the naturally preferred isomeric form, usually the L-configuration.

[0419] Preferred basic amino acids are selected from the group formed by: arginine, lysine, ornithine and histidine, with arginine and lysine being particularly preferred. Thus, in another particularly preferred embodiment, the reagent according to the present invention is characterized in that the alkalizing agent is a basic amino acid selected from the group: arginine, lysine, ornithine and / or histidine.

[0420] Alternatively, the product may contain other alkalizing agents, especially inorganic alkalizing agents. The inorganic alkalizing agents that can be used according to the present invention are preferably selected from the group consisting of: sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, sodium metasilicate, potassium silicate, sodium carbonate, and potassium carbonate.

[0421] Particularly preferred alkalizing agents are ammonia, 2-aminoethanol (monoethanolamine), 3-aminopropanol, 4-aminobutanol, 5-aminopentanol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1,2-diol, 2-amino-2-methylpropane-1,3-diol, arginine, lysine, ornithine, histidine, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, sodium metasilicate, potassium silicate, sodium carbonate, and potassium carbonate.

[0422] In another very particularly preferred embodiment, the method according to the present invention is characterized in that the colorant (a) comprises at least one alkalizing agent selected from the group consisting of: ammonia, 2-aminoethanol (monoethanolamine), 3-aminopropanol, 4-aminobutanol, 5-aminopentanol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1,2-diol, 2-amino-2-methylpropane-1,3-diol, arginine, lysine, ornithine, histidine, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, sodium metasilicate, potassium silicate, sodium carbonate, and potassium carbonate.

[0423] Method for dyeing keratin material

[0424] The above reagents can be well used in the method of dyeing keratin materials, especially human hair.

[0425] Therefore, the second object of the present invention is a method for coloring keratin materials, especially human hair, comprising the following steps:

[0426] (1) Applying the colorant to the keratin material, wherein the colorant is the reagent detailedly disclosed in the description of the first subject of the present invention,

[0427] (2) Exposing the colorant to the keratin material, and

[0428] (3) Rinsing off the dye with water.

[0429] In step (1) of the method according to the invention, the reagent of the first invention is applied to keratin materials, which are most preferably human hairs.

[0430] In step (2) of the method according to the invention, the reagent is then allowed to act on the keratin material after its application. Different exposure times, for example from 30 seconds to 60 minutes, are conceivable herein.

[0431] However, the main advantage of the dyeing system according to the invention is that strong coloring results can be obtained even within a very short time after a short exposure time. Therefore, it is advantageous if the applied mixture remains on the keratin material for only a relatively short period of time, from 30 seconds to 15 minutes, preferably from 30 seconds to 10 minutes, and particularly preferably from 1 to 5 minutes, after its application.

[0432] In a further preferred embodiment, the method according to the invention is characterized in that:

[0433] (2) The coloring agent is exposed to the keratin material for a time range of from 30 seconds to 15 minutes, preferably from 30 seconds to 10 minutes, and most preferably from 1 to 5 minutes.

[0434] Finally, after the action of the applied mixture on the keratin material, in step (3) of the method, the applied mixture is rinsed with water.

[0435] Herein, in one embodiment, the applied mixture can be washed only with water, i.e., without the aid of after-treatment agents or shampoos. It is also conceivable in principle to use after-treatment agents or conditioners in step (6).

[0436] However, to solve the task according to the invention and improve the ease of use, it has proven to be particularly preferred to rinse the reagent with water only in step (3) without the aid of other after-treatment agents, shampoos or conditioners.

[0437] In a further preferred embodiment, the method according to the invention is characterized in that: (3) The dye is rinsed off only with water.

[0438] Regarding further preferred embodiments of the method according to the invention, the content already described for the reagents according to the invention applies mutatis mutandis. Examples

[0439] 1. Preparation

[0440] The following preparations are prepared (all data are in % by weight unless otherwise stated):

[0441]

[0442]

[0443] 2. Application

[0444] The reagent (E1) was applied to the hair tresses (Kerling, European natural hair white, bath ratio: 1 g of reagent (E1) per gram of hair tresses). The reagent was allowed to act for 3 minutes. Subsequently, the hair tresses were thoroughly washed with water (1 minute), dried and then colorimetrically measured using a Spectraflash 450 colorimeter from Datacolor.

[0445] As a comparison, comparative formulation V1 was applied to hair tresses (Kerling, European natural hair white, bath ratio: 1 g of reagent (V1) per gram of hair tress) and left to act for three minutes. Subsequently, these hair tresses were also thoroughly washed with water (1 minute), dried and then subjected to colorimetric measurement.

[0446] After the first farmetric measurement, all colored tresses were hand washed 5 times by the same person (each hair wash: 0.25 g shampoo (Schauma, 7-herbs) was applied to each wet tress, shampooed for 30 minutes, rinsed with water for 1 minute, dried). After 5 hair washes, each tress was colorimetrically measured again.

[0447] The dE values ​​used to evaluate wash fastness are derived from the L*a*b* colorimetric values ​​measured on the corresponding beam portions as follows:

[0448] dE=[(L i -L0) 2 +(a i -a0) 2 +(b i -b0)] 1 / 2

[0449] L0, a0 and b0 = values ​​measured before shampooing

[0450] L i 、a i and b i =Measurement value after shampooing

[0451] Calculate the chromaticity of a color according to the following formula

[0452]

[0453] The larger the C value, the higher the chroma of the coloring.

[0454]

[0455] When comparing the colorimetric values obtained before and after 5 hair washings, the staining obtained using the comparative example preparation exhibited a greater color difference, and thus had poorer wash fastness. The staining obtained using the preparation according to the present invention had better wash fastness.

[0456] After 0 hair washings, the chromaticity value obtained using the preparation according to the present invention increased slightly compared to the reference preparation. After 5 hair washings, the chromaticity value obtained using the preparation according to the present invention was much higher than the chromaticity value obtained using the comparative example preparation.

Claims

1. Use of methyl 4-hydroxybenzoate and 2-phenoxyethanol for improving the wash fastness of dyeing in a reagent for dyeing keratin materials, said reagent comprising (a1) at least one amino-functionalized polysiloxane polymer, and (a2) at least one colorant compound, and (a3) a preservative, said preservative comprising methyl 4-hydroxybenzoate and 2-phenoxyethanol, and (a4)At least one non-ionic surfactant selected from the group consisting of addition products of ethylene oxide and C8-C 24 fatty alcohols; wherein the content of methyl 4-hydroxybenzoate in the reagent is 0.1 - 0.4% by weight, and the content of 2-phenoxyethanol in the reagent is 0.1 - 0.9% by weight, each based on the total weight of the reagent.

2. The use according to claim 1, characterized in that the reagent comprises at least one amino-functionalized polysiloxane polymer (a1) having at least one secondary amino group.

3. The use according to claim 1, characterized in that the reagent comprises at least one amino-functionalized polysiloxane polymer (a1) comprising at least one structural unit of formula (Si-amino). Among them, ALK1 and ALK2 independently represent a linear or branched C1-C 20 divalent alkylene group.

4. The use according to claim 1, characterized in that the reagent comprises at least one amino-functionalized polysiloxane polymer (a1) comprising structural units of formula (Si-I) and formula (Si-II).

5. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a total amount of 0.1 - 8.0% by weight of one or more amino-functionalized polysiloxane polymers (a1).

6. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a total amount of 0.2 - 5.0% by weight of one or more amino-functionalized polysiloxane polymers (a1).

7. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a total amount of 0.3 - 3.0% by weight of one or more amino-functionalized polysiloxane polymers (a1).

8. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a total amount of 0.4 - 2.5% by weight of one or more amino-functionalized polysiloxane polymers (a1).

9. The use according to claim 1, characterized in that the reagent comprises at least one colorant compound (a2) selected from the group consisting of pigments, direct dyes, photochromic dyes and thermochromic dyes.

10. The use according to claim 1, characterized in that the reagent comprises at least one colorant compound (a2) selected from the group of inorganic pigments.

11. The use according to claim 10, characterized in that the inorganic pigments are selected from the group consisting of: non-ferrous metal oxides, metal hydroxides, metal oxide hydrates, silicates, metal sulfides, double metal cyanides, metal sulfates, bronze pigments and / or colored mica or mica-based pigments coated with at least one metal oxide and / or metal chlorooxide.

12. The use according to claim 1, characterized in that the reagent comprises at least one colorant compound (a2) selected from the group of organic pigments.

13. The use according to claim 12, characterized in that the organic pigment is selected from the group consisting of: carmine, quinacridone, phthalocyanine, sorghum, blue pigments with Color Index numbers CI 42090, CI 69800, CI 69825, CI 73000, CI 74100, CI 74160, yellow pigments with Color Index numbers CI 11680, CI 11710, CI 15985, CI 19140, CI 20040, CI 21100, CI 21108, CI 47000, CI 47005, green pigments with Color Index numbers CI 61565, CI 61570, CI 74260, orange pigments with Color Index numbers CI 11725, CI 15510, CI 45370, CI 71105, and red pigments with Color Index numbers CI 12085, CI 12120, CI 12370, CI 12420, CI 12490, CI 14700, CI 15525, CI 15580, CI 15620, CI 15630, CI 15800, CI 15850, CI 15865, CI 15880, CI 17200, CI 26100, CI 45380, CI 45410, CI 58000, CI 73360, CI 73915 and / or CI 75470.

14. The use according to claim 9, characterized in that, based on the total weight of the reagent, the reagent contains one or more pigments in a total amount of 0.01 - 10.0% by weight.

15. The use according to claim 9, characterized in that, based on the total weight of the reagent, the reagent contains one or more pigments in a total amount of 0.1 - 5.0% by weight.

16. The use according to claim 9, characterized in that, based on the total weight of the reagent, the reagent contains one or more pigments in a total amount of 0.2 - 2.5% by weight.

17. The use according to claim 9, characterized in that, based on the total weight of the reagent, the reagent contains one or more pigments in a total amount of 0.25 - 1.5% by weight.

18. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a preservative (a3) in a total amount of 0.2 - 5.0% by weight.

19. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a preservative (a3) in a total amount of 0.2 - 2.5% by weight.

20. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a preservative (a3) in a total amount of 0.2 - 1.0% by weight.

21. The use according to claim 1, characterized in that, based on the total weight of the reagent, the reagent contains a preservative (a3) in a total amount of 0.2 - 0.8% by weight.

22. The use according to claim 1, characterized in that the reagent comprises at least one non-ionic surfactant (a4) of formula (T-I), wherein Ra is a saturated or unsaturated, unbranched or branched C8-C 24 alkyl group, and n is an integer from 80 to 120.

23. The use according to claim 22, characterized in that Ra is a saturated unbranched C 16 -C 18 alkyl group.

24. The use according to claim 22, characterized in that n is an integer from 90 to 110.

25. The use according to claim 22, characterized in that n is the number 100.

26. The use according to claim 1, characterized in that the reagent comprises at least one non-ionic surfactant (a4) of formula (T-II), wherein Rb represents a saturated or unsaturated, unbranched or branched C8-C 24 alkyl group, and m is an integer from 10 to 40.

27. The use according to claim 26, characterized in that Rb represents a saturated unbranched C 16 -C 18 alkyl group.

28. The use according to claim 26, characterized in that m is an integer from 20 to 35.

29. The use according to claim 26, characterized in that m is the number 30.

30. The use according to claim 1, characterized in that the reagent contains one or more fatty components selected from the group consisting of C 12 -C 30 fatty alcohols, C 12 -C 30 triglycerides, C 12 -C 30 monoglycerides, C 12 -C 30 diglycerides and / or hydrocarbons.

31. The use according to claim 1, characterized in that - based on the total weight of the reagent - - the total content of all anionic surfactants contained in the reagent is less than 0.1% by weight, and - the total content of all cationic surfactants contained in the reagent is less than 0.1% by weight.

32. The use according to claim 1, characterized in that - based on the total weight of the reagent - - the total content of all anionic polymers contained in the reagent is less than 0.1% by weight, and - the total content of all cationic polymers contained in the reagent is less than 0.1% by weight.

33. The use according to claim 1, characterized in that the reagent contains water and has a pH of 7.0 to 11.

5.

34. The use according to claim 33, characterized in that the reagent has a pH of 8.0 to 11.

0.

35. The use according to claim 33, characterized in that the reagent has a pH of 8.5 to 10.

5.

36. The use according to claim 1, characterized in that the keratin material is human hair.

Images