Composition for colouring a substrate and use thereof

Abstract

The invention relates to a composition for colouring a substrate, comprising 10 to 70 wt.% water, 0.025 to 12.5 wt.% colourant, and 0.1 to 10 wt.% tetravalent alcohol, each relative to the total weight of the composition, wherein the tetravalent alcohol has at least carbon atoms, and the use of the composition for colouring a substrate to form a film on a substrate.

Description

[0001] Composition for coloring a substrate and use thereof

[0002] Field of the invention

[0003] The present invention relates to a composition for coloring a substrate.

[0004] The invention also relates to the use of the composition for coloring a substrate for producing a film on a substrate.

[0005] Background of the invention

[0006] Aqueous writing fluids, such as inks, are well known in the art and typically contain water as the solvent and pigments or water-soluble dyes as the coloring agents. They also typically contain other additives, such as surfactants, emulsifiers, preservatives, or humectants.

[0007] Pigmented inks (paints) have been known for many years, especially for artistic applications (painting, drawing, etc.). These are often formulated with polymer dispersions as binders and / or with wetting agents.

[0008] The "cap-off time" (COT) of a writing fluid describes the period of time during which the writing fluid in a writing or application device does not dry out when stored with the writing tip uncovered or with the cap removed. For practical use of a writing fluid, it is advantageous if the writing or other application device can remain uncovered for an extended period, preferably several hours or days, without the writing fluid drying out.

[0009] State-of-the-art water-based writing fluids can be divided into the following three groups: a) Inks that are supposed to have a very good COT. These contain a high level of so-called drying retarders or humectants to prevent the writing tip from drying out or drying out (fineliners, fiber pens). Due to the high proportion of drying retarders or humectants, such inks can only contain small amounts of binder. These inks therefore generally have very long drying times and poor resistance. Such writing fluids are generally only suitable for absorbent substrates, such as paper. b) Inks that are supposed to dry quickly and permanently on non-absorbent surfaces. Unfortunately, these usually have a completely unsatisfactory COT. c) Inks that offer a compromise between a) and b), i.e., a good COT and satisfactory resistance, but only on absorbent substrates.

[0010] EP 3 613 814 Bi, for example, describes a writing, marking and / or drawing fluid which contains an aqueous pigment preparation, a binder, a base and a dispersing wetting agent, wherein an aqueous solution of a modified polymer with pigment-affinic groups is contained as the dispersing wetting agent.

[0011] State-of-the-art pigment liner inks contain 20% urea by mass and a further 15% humectant to achieve an 18-hour COT. The addition of urea ensures that the smear dries satisfactorily quickly on moderately absorbent substrates and exhibits acceptable durability after a longer drying time. The urea crystallizes in the process.

[0012] On unsuitable, poorly absorbent paper types or even on foil-coated substrates (e.g., photographic prints, laminated paper, etc.), however, the smear will not dry satisfactorily or become stable even after hours or days. The result is that the smear will smear or stain upon contact. Furthermore, the high urea content impairs the water resistance of the smear, and the urea tends to decompose during prolonged storage of the inks (especially at elevated temperatures according to a Tso storage test), forming CO2 and ammonia in the alkaline range and further increasing the pH. The result is the gradual destabilization of the inks.

[0013] Alcohol-based inks (Lumocolor permanent, whiteboard markers) have been offering a solution to this problem for about twenty years with so-called "Dry Safe" technology, offering a very good COT, a short drying time, and excellent durability. Special wax additives, moderately soluble in the ink, provide protection against drying out. When the pen is left exposed, the wax dissolves to saturation and precipitates at the tip, forming a wafer-thin barrier film that protects against further solvent loss and thus drying out. However, this film is so mechanically unstable that it ruptures at the slightest contact between the tip and the substrate, immediately preventing ink flow. No corresponding solutions exist for water-based writing fluids.

[0014] Object of the invention

[0015] It is therefore the object of the present invention to provide a water-based writing fluid which overcomes the disadvantages of the prior art, in particular to provide an aqueous writing fluid with an excellent cap-off time (COT) which nevertheless has very short drying times and excellent resistance on all types of substrates, in particular also on non-absorbent surfaces, preferably a corresponding aqueous writing fluid which has a reduced urea content or is even free of urea.

[0016] Disclosure of the invention

[0017] This object is achieved according to the subject matter of the independent claims. Preferred embodiments emerge from the subclaims and the following description.

[0018] The object is achieved in particular by a composition for coloring a substrate, comprising: - 10 to 70 wt.% water;

[0019] - 0.1 to 50 wt.% of a colorant; and

[0020] - 1 to 6% by weight of a tetrahydric alcohol, based on the total weight of the composition; wherein the tetrahydric alcohol has at least 5 carbon atoms.

[0021] The object is further achieved by the use of the composition for coloring a substrate according to the present invention for producing a film on an absorbent substrate.

[0022] Composition for coloring a substrate

[0023] The composition according to the present invention is suitable and preferably intended for coloring a substrate.

[0024] dyeing

[0025] Coloring preferably includes or consists of writing, drawing, painting, printing, spraying or a combination of two or more of these.

[0026] Substrat

[0027] The substrate is preferably an absorbent substrate, for example an absorbent writing support, more preferably drawing board or paper, particularly preferably watercolor paper, or a non-absorbent substrate, for example a plastic substrate, particularly preferably a plastic film, or a mixed media substrate, i.e., one made of an absorbent material and a non-absorbent material, or a canvas. Any other suitable substrate, such as wood, stone, eggshells, etc., can also be provided.

[0028] Water

[0029] The composition according to the invention for coloring a substrate contains water in an amount of 10 to 70 wt.%, based on the total weight of the composition. It is preferred that deionized or demineralized water be used as the water. This makes it possible to avoid the introduction of unwanted contaminants, such as hardness-forming substances like calcium and magnesium, or similar.

[0030] It may be provided that the composition contains water as the predominant solvent, preferably in an amount of at least 90% by volume, based on the total amount of solvent in the composition. It is particularly preferred that the composition contains water as the sole solvent.

[0031] It is preferred that the composition contains water in an amount of at least 15% by weight, more preferably at least 20% by weight, most preferably at least 25% by weight, in each case based on the total weight of the composition.

[0032] It is preferred that the composition contains water in an amount of at most 65% by weight, further preferably at most 60% by weight, further preferably at most 55% by weight, more preferably at most 50% by weight, most preferably at most 45% by weight, for example at most 40% by weight, in each case based on the total weight of the composition.

[0033] It is preferred that the composition contains water in an amount of 15 to 65 wt.%, more preferably 20 to 40 wt.%, most preferably 25 to 35 wt.%, for example about 30 wt.%, in each case based on the total weight of the composition.

[0034] With the specified preferred amounts of water in the composition, an optimized coloration on the one hand and applicability on the other hand could be achieved.

[0035] Additional solvent

[0036] It may be provided that water is the only solvent in the composition according to the invention for dyeing a substrate. Alternatively, it may be provided that the composition according to the invention for dyeing a substrate comprises another solvent in addition to water.

[0037] It can be provided that the composition for coloring a substrate contains the further solvent in an amount of at least 1% by weight, particularly preferably at least 5% by weight, most preferably at least 10% by weight, in each case based on the total weight of the composition.

[0038] It is preferred that the composition for coloring a substrate contains the further solvent in an amount of at most 40 wt.%, further preferably at most 35 wt.%, further preferably at most 30 wt.%, more preferably at most 20 wt.%, most preferably at most 15 wt.%, in each case based on the total weight of the composition.

[0039] It is preferred that the composition for coloring a substrate contains the further solvent in an amount of 1 to 40 wt.%, more preferably 5 to 20 wt.%, most preferably 10 to 15 wt.%, in each case based on the total weight of the composition.

[0040] It is preferred that the additional solvent is a water-soluble organic solvent, more preferably an alcohol, furthermore preferably a polyhydric alcohol, most preferably glycerin or a glycol, e.g., 1,2-propanediol. By adding the additional solvent to the composition according to the invention, improved solubility behavior can be achieved for substances, such as pigments or other colorants, that are sparingly soluble in water. Furthermore, the effectiveness of the tetrahydric alcohol as a cap-off additive can be increased synergistically. Finally, the addition of a suitable solvent can positively influence film formation and thus the durability of the smear.

[0041] Colorants

[0042] The composition according to the invention for coloring a substrate contains a colorant in an amount of 0.025 to 12.5% ​​by weight, based on the total weight of the composition.

[0043] It is preferred that the colorant is a dye, a pigment or a mixture of two or more thereof.

[0044] As dyes, in particular water-soluble dyes, preferably water-soluble dyes based on food dyes and / or acid dyes and / or basic dyes can be used.

[0045] The following dyes have proven to be particularly suitable:

[0046] Food colorings from the group: E 110, CI 15985, Food Yellow 3; E 104, CI 47005, Food Yellow 13; E 102, CI 19140, Food Yellow 4; E 124, CI 16255, Food Red 7; E 127, CI 45430, Food Red 14; E 133, CI 42090, Food Blue 2; E 131, CI 42051, Food Blue 3 and / or

[0047] Acid dyes from the group: Acid Yellow 23, CI 1910; Acid Red 18, CI 16255; Acid Red 51, CI 45430; Acid Orange 4, CI 16230; Acid Blue 93; Acid Blue 9, CI 42090; Acid Blue 104, CI 42735; Acid Violet 49, CI 42640.

[0048] Basic dyes, preferably dyes from the group of xanthene, coumarin and rhodamine dyes, for example Basic Violet 11, Basic Yellow 40, Basic Blue 3, Basic Blue 7, Basic Red 1, Basic Green 1

[0049] As pigments, preferably organic pigments, furthermore preferably quinacridones, phthalocyanine, metal complex, dioxazine, isoindoline, isoindolinone, benzimidazolone, anthraquinone, arylide, perinone, perylene, naphthol, diketopyrrolopyrrole or azo pigments, particularly preferably magenta red PR 122 or other quinacridones and / or inorganic pigments, such as titanium dioxide, iron oxide, ultramarine or carbon black, can be used.

[0050] The colorants specified as preferred can achieve particularly brilliant, intense, and durable coloring. It is preferred that the composition contains the colorant in an amount of at least 0.05% by weight, particularly preferably at least 0.075% by weight, based in each case on the total weight of the composition. It is preferred that the composition contains the colorant (or colorant preparation) in an amount of at most 11.25% by weight, more preferably at most 10% by weight, furthermore preferably at most 8.75% by weight, more preferably at most 7.5% by weight, most preferably at most 6.25% by weight, for example at most 5% by weight, based in each case on the total weight of the composition.

[0051] It may be intended that the pigments are present and used as a component of a pigment preparation.

[0052] It is preferred that the composition contains the colorant in an amount of 0.025 to 10 wt.%, more preferably 0.05 to 7.5 wt.%, most preferably 0.075 to 5 wt.%, in each case based on the total weight of the composition.

[0053] If the colorant is a dye, it is preferred that the composition contains the colorant in an amount of 0.025 to 3% by weight, more preferably 0.05 to 2% by weight, most preferably about 0.1 to 1% by weight, in each case based on the total weight of the composition.

[0054] If the colorant is a pigment, it is preferred that the composition contains the colorant in an amount of 0.25 to 10% by weight, more preferably 1.25 to 7.5% by weight, most preferably 2.5 to 5% by weight, for example about 4.8% by weight, in each case based on the total weight of the composition.

[0055] For pastel shades, the pigment content can be reduced to 0.025% by weight.

[0056] Optimal coloring can be achieved by using the preferred amounts of colorant.

[0057] Tetrahydric alcohol

[0058] The composition according to the invention for coloring a substrate contains 0.1 to 10 wt.% of a tetrahydric alcohol, based on the total weight of the composition.

[0059] The tetrahydric alcohol has at least 5 carbon atoms. The tetrahydric alcohol preferably has at most 22 carbon atoms, more preferably 5 to 18 carbon atoms, further preferably 5 to 15 carbon atoms, likewise preferably 5 to 12 carbon atoms, most preferably 5 to 10 carbon atoms.

[0060] The tetrahydric alcohol is preferably present in an amount of at least 1% by weight, more preferably at least 2% by weight, further preferably at least 3% by weight, most preferably at least 4% by weight, based on the total weight of the composition.

[0061] The tetrahydric alcohol is preferably present in an amount of at most 9 wt.%, more preferably at most 8 wt.%, further preferably at most 7 wt.%, most preferably at most 6 wt.%, based on the total weight of the composition. The tetrahydric alcohol is preferably present in an amount of 1 to 9 wt.%, more preferably 2 to 8 wt.%, further preferably 3 to 7 wt.%, most preferably 4 to 6 wt.%, for example about 5 wt.%, based on the total weight of the composition.

[0062] Alcohols are organic compounds that contain one or more functional hydroxyl groups (-OH). Polyhydric alcohols contain multiple hydroxyl groups. Tetrahydric alcohols contain four hydroxyl groups.

[0063] In addition to the four hydroxyl groups, the tetrahydric alcohol contained in the composition according to the invention for dyeing a substrate has an organic moiety containing at least 5 carbon atoms. This organic moiety may be a hydrocarbylene group, in particular a C5 to C 22 , preferably C5 to C18, furthermore preferably C5 to C15, furthermore preferably C5 to C i2 , most preferably a C5 to C10 hydrocarbylene group or a heterohydrocarbylene group, especially a C5 to C 2i , preferably C5 to C18, furthermore preferably C5 to C15, furthermore preferably C5 to C i2 , most preferably C5to Ci0heterohydrocarbylene group.

[0064] According to the lUPAC definition, hydrocarbyl refers to monovalent groups resulting from the removal of one hydrogen atom (H) from a hydrocarbon molecule. Accordingly, according to the present application, a hydrocarbylene group is one resulting from the removal of at least one hydrogen atom (H), in particular four hydrogen atoms, from a hydrocarbon molecule.

[0065] A heterohydrocarbylene group according to the present disclosure is a hydrocarbylene group in which at least one of the carbon atoms is replaced by a heteroatom, in particular by a heteroatom selected from the group consisting of O, N, S and P.

[0066] The hydrocarbylene group can be an alkylene group, an arylene group, an alkene group, an alkyne group, an alkylarylene group, an arylalkylene group, etc. The hydrocarbylene group can be an alkylene group.

[0067] The hydrocarbylene group can in particular be a C5 to C 22 Alkyl group, preferably C5 to C18 alkyl group, furthermore preferably C5 to C15 alkyl group, furthermore preferably C5 to C i2 Alkyl group, most preferably C5 to C10 alkyl group.

[0068] The hydrocarbylene group is particularly preferably a tert-pentylene group.

[0069] The heterohydrocarbylene group may comprise one or more ether groups, a thioether group, an amine group, especially a secondary amine group, an alkylphosphine group, etc., between two or more hydrocarbylene groups. The heterohydrocarbylene group may comprise an ether group between two hydrocarbylene groups.

[0070] The heterohydrocarbylene group can be a C5 to C 22 Heteroalkyl group, preferably C5 to C18 heteroalkyl group, furthermore preferably C5 to C15 heteroalkyl group, furthermore preferably C5 to C i2 Heteroalkyl group, most preferably C5 to Ci0 Heteroalkyl group. In this context, a heteroalkyl group is an alkyl group in which one or more carbon atoms are replaced by one or more heteroatoms, such as O, S, N, or P.

[0071] Preferably, the heterohydrocarbylene group is a C5 to C 22 Heteroalkyl group, preferably C5 to C18 heteroalkyl group, furthermore preferably C5 to C15 heteroalkyl group, furthermore preferably C5 to C i2 Heteroalkyl group, most preferably C5 to C i0 Heteroalkyl group containing an ether bond, i.e. in which formally one of the carbon atoms of the alkyl group is replaced by an oxygen atom.

[0072] It is preferred that the tetrahydric alcohol has a molecular weight of 100 to 1,000 g / mol, more preferably 100 to 750 g / mol, further preferably 100 to 500 g / mol, further preferably 100 to 300 g / mol, most preferably 130 to 230 g / mol, for example 136 to 223 g / mol.

[0073] It is preferred that the tetrahydric alcohol has a solubility in deionized water at 20°C of 10 to 100 g / L, preferably 15 to 80 g / L, most preferably 21 to 70 g / L.

[0074] It is preferred that the tetrahydric alcohol is symmetrical, in particular has a symmetry that causes the tetrahydric alcohol to have no dipole character. It is preferred that the tetrahydric alcohol is symmetrical with respect to the four hydroxyl groups of the tetrahydric alcohol. It is preferred that the tetrahydric alcohol has a plane of symmetry. It is preferred that the tetrahydric alcohol has a plane of symmetry, wherein two of the four hydroxyl groups of the tetrahydric alcohol are arranged on one side of the mirror plane and the two remaining hydroxyl groups of the tetrahydric alcohol are arranged on the other side of the mirror plane.

[0075] Preferably, the tetravalent alcohol has the following formula (1) where R is a Ci to C18 hydrocarbylene group or a Ci to C i7 Heterohydrocarbylene group having 1 to 3 heteroatoms independently selected from O, N, S and P.

[0076] Preferably, R in formula (1) is a Ci to C i2 Hydrocarbylene group or a Ci to Cu heterohydrocarbylene group having 1 to 2 heteroatoms, independently selected from O and S. Furthermore, R in the formula (1) is preferably a Ci to Cs hydrocarbylene group or a Ci to Cs heterohydrocarbylene group having one heteroatom, independently selected from O and S. Further preferably, R in the formula (1) is a Ci to C0 hydrocarbylene group or a Ci to C0 heterohydrocarbylene group having O (oxygen) as a single heteroatom.

[0077] Preferably, R in formula (1) is a Ci to C i2Alkylene group or a Ci to Cu heteroalkylene group having 1 to 2 heteroatoms, independently selected from O and S. Furthermore, R in the formula (1) is preferably a Ci to Cs alkylene group or a Ci to Cs heteroalkylene group having one heteroatom, independently selected from O and S. Further preferably, R in the formula (1) is a Ci to CÖ alkylene group or a Ci to CÖ heteroalkylene group having O (oxygen) as a single heteroatom.

[0078] It is most preferred that the tetrahydric alcohol is selected from tetrahydric alcohols of formulas (2) and (3)

[0079] Pentaerythritol

[0080] Di(trimethylolpropane)

[0081] The tetrahydric alcohol acts as a cap-off additive in the composition according to the invention for coloring a substrate. A cap-off additive improves the cap-off time. "Cap-off time" is the time a writing instrument or writing system can remain open, i.e., unsealed, stored, or unused without drying out.

[0082] binder

[0083] It may be provided that the composition for coloring a substrate further comprises 0.1 to 50 wt.% of a binder.

[0084] It is preferred that the composition contains the binder in a total amount of at least 5 wt.%, particularly preferably at least 10 wt.%, further preferably at least 20 wt.%, furthermore preferably 25 wt.%, most preferably at least 28 wt.%, in each case based on the total weight of the composition.

[0085] It is preferred that the composition contains the binder in a total amount of at most 45% by weight, particularly preferably at most 40% by weight, for example about 38% by weight, in each case based on the total weight of the composition.

[0086] It is preferred that the composition contains the binder in a total amount of 5 to 45 wt.%, particularly preferably 10 to 40 wt.%, further preferably 20 to 40 wt.%, most preferably about 25 to 38 wt.%, for example about 28 to 38 wt.%, in each case based on the total weight of the composition.

[0087] Appropriate amounts of binder in the composition support the solubility and effectiveness of the tetrahydric alcohol. The binder can be used as a solid and / or as an aqueous binder preparation in the composition, i.e., used in these forms to produce the composition. In this context, an aqueous binder preparation is, in particular, a binder solution or a binder dispersion.

[0088] It is preferred that a binder dispersion be used to prepare the composition according to the invention. In such a case, the amount of binder in the composition is specified with reference to the total weight of the binder dispersion (including solvent, etc.). By using an appropriate binder dispersion to prepare the composition according to the invention, advantageous mixing in the composition can be achieved.

[0089] It may be provided that the binder is a synthetic polymeric binder, preferably a polyacrylate, a polyurethane, a polyester, a sulfopolyester, a maleate resin, or a copolymer of two or more thereof, or a wax, for example beeswax.

[0090] For example, the binder can be Acronal 12DE (dispersion of an acrylonitrile-acrylic acid ester copolymer, BASF), Neocryl XK166N (dispersion of an acrylostyrene copolymer, Covestro), NeoRez R-3972 (polyurethane dispersion, Covestro), Eastek 1000 (colloidal solution of a sulfopolyester, Eastman), or Neocryl XK-39 (alkali-soluble polyacrylate dispersions, Covestro).

[0091] It is preferred that the binder is an acrylo-styrene copolymer, a sulfopolyester, or a mixture thereof, preferably a mixture of an acrylo-styrene copolymer and a sulfopolyester. It is further preferred that the binder is a mixture of an acrylo-styrene copolymer and a sulfopolyester in a weight ratio of 10:1 to 1:2, more preferably 5:1 to 1:1.5, further preferably 3:1 to 1:1, for example, about 2:1.

[0092] For example, the binder can be a mixture of Neocryl XK166N (dispersion of an acrylo-styrene copolymer, Covestro) and Eastek 1000 (colloidal solution of a sulfopolyester, Eastman) in a weight ratio of 2:1.

[0093] Alternatively, it can be provided that the binder preferably has an acid number of at most 250 mg KOH / g dry matter, more preferably of at most 220 mg KOH / g dry matter, further preferably of at most 200 mg KOH / g dry matter, more preferably of at most 180 mg KOH / g dry matter, even more preferably of at most 170 mg KOH / g dry matter, most preferably of at most 160 mg KOH / g dry matter, for example about 130 mg KOH / g or 160 mg KOH / g dry matter.

[0094] The binder can preferably have an acid number of 50 to 250 mg KOH / g dry substance, more preferably 60 to 220 mg KOH / g dry substance, further preferably 70 to 220 mg KOH / g dry substance, more preferably 80 to 180 mg KOH / g dry substance, even more preferably 100 to 170 mg KOH / g dry substance, further preferably 100 to 160 mg KOH / g dry substance, most preferably 100 to 160 mg KOH / g dry substance, such as 100 to 130 mg KOH / g dry substance, for example about 130 mg KOH / g dry substance or 160 mg KOH / g dry substance. With binders with a corresponding acid number, advantageous effects with regard to resolubility using a basic composition for watercolor painting could be achieved.

[0095] The binder can preferably be a polymeric binder. The binder can preferably be a polymer resin. It can be provided that the binder contains carboxyl groups and / or nitrile groups and / or sulfonyl groups, preferably carboxyl groups. This allows particularly good colorability, in particular with basic dyes, to be achieved. It is preferably provided that the binder is a polymer resin comprising carboxyl-containing monomer units. It is particularly preferred that the binder comprises or consists of a polyacrylate resin.

[0096] It can be provided that the binder dispersion has a pH of at most 7, preferably less than 7, more preferably from 1 to 5, further preferably from 1.5 to 3, most preferably from 1.9 to 2.5. It can be provided that the binder dispersion is a thin, white or translucent binder particle dispersion in acidic or neutral pH ranges (at pH < 7), wherein these binder particles increasingly dissolve at higher pH values ​​until a clear, transparent and highly viscous solution is formed.

[0097] It can be provided that the binder dispersion has a solids content of 30 to 60 wt.%, preferably 40 to 50 wt.%, particularly preferably 43 to 47 wt.%, most preferably 44 to 46 wt.%, in each case based on the total weight of the binder dispersion.

[0098] The binder can be an alkali-soluble acrylate dispersion. The binder can be an alkali-soluble polyacrylate dispersion. The binder can be an acidic acrylate dispersion. The binder can be an acidic polyacrylate dispersion. The binder can be an ASE thickener. Commercially available examples of corresponding binders include Joncryl 142, 661, 662, 667 (BASF), Texicryl 13-812, 13-825 (Scott Bader), NeoCryl BT-9, BT-21, BT-24, BT-100, BT-107, BT-207 (DSM), NeoCryl XK-39 (DSM), GLASCOL LE510, LE520, etc. (BASF), or Lucidene 198 (Brenntag). With corresponding alkali-soluble polyacrylate dispersions, the most pronounced effects according to the invention were achieved, namely a particularly well-adjustable water resistance.

[0099] It can be provided that the binder, in particular the binder dispersion, comprises binder particles. It can be provided that the binder particles have an average particle diameter of at least 50 nm, preferably of at least 100 nm. The particle diameter can be determined by dynamic light scattering according to ASTM E 3247-20 in the version valid on the priority date. By using appropriately large diameters of the binder particles, it can be ensured that the composition does not penetrate too deeply into the absorbent substrate, thereby improving the watercolorability, i.e., the subsequent paintability of the ink on the substrate.

[0100] Preservative / Biocide

[0101] It may be provided that the composition further comprises 0.01 to 0.5 wt.%, based on the total weight of the composition, of a preservative and / or a biocide. Preferred preservatives are, for example, a mixture of tert-butyl hydroperoxide and monophenyl glycol ether, particularly preferably a mixture of 12 to 60 wt.% tert-butyl hydroperoxide and 3 to 50 wt.% monophenyl glycol ether, or a mixture of i,6-dihydroxy-2,5-dioxahexane and tetramethylolacetylenediurea. Such a preservative is particularly suitable for aqueous solutions and emulsions. A preferred biocide, for example, is a mixture of 2-bromo-2-nitropropane-1,3-diol and 2-octyl-2H-isothiazol-3-one or a mixture of BIT (1,2-benzisothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), and OIT (2-octyl-2H-isothiazol-3-one), which particularly prevents microbial contamination. Another preferred biocide is a mixture of CIT / MIT in a weight ratio of 3:1.Another preferred biocide is 2-bromo-2-nitropropane-1,3-diol. Another preferred biocide is 2-octyl-2H-isothiazol-3-one. Another preferred biocide is phenoxyethanol.

[0102] It is preferred that the composition contains the preservative and / or the biocide in a total amount of at least 0.05 wt.%, particularly preferably at least 0.2 wt.%, further preferably at least 0.15 wt.%, most preferably at least 0.1 wt.%, in each case based on the total weight of the composition.

[0103] It is preferred that the composition contains the preservative and / or the biocide in a total amount of at most 0.4 wt.%, particularly preferably at most 0.3 wt.%, further preferably at most 0.25 wt.%, most preferably at most 0.2 wt.%, in each case based on the total weight of the composition.

[0104] It is preferred that the composition contains the preservative and / or the biocide in a total amount of 0.025 to 0.4 wt.%, particularly preferably 0.05 to 0.3 wt.%, further preferably 0.75 to 0.2 wt.%, most preferably about 0.1 wt.%, in each case based on the total weight of the composition.

[0105] Humectants

[0106] It may be provided that the composition further comprises 0.01 to 20 wt. %, based on the total weight of the composition, of a humectant. The humectant is preferably an organic polyol and / or polyglycol and / or a sugar alcohol and / or a polar organic compound that is liquid at room temperature and under atmospheric pressure, particularly preferably selected from the group consisting of diethylene glycol, propylene glycol, 1,2-propanediol, glycerin, trimethylolpropane, ditrimethylolpropane, neopentyl glycol, erythritol, dimethyl sulfoxide, pyrrolidones, in particular 2-pyrrolidone or N-methyl-2-pyrrolidone (NMP), and mixtures thereof, particularly preferably 1,2-propanediol. Preferred is a combination of an organic polyol and / or polyglycol and / or a polar organic compound which is liquid at room temperature and under normal pressure as humectant on the one hand and pentaerythritol and / or di(trimethylolpropane) on the other hand.A combination of an organic polyol and / or polyglycol as a humectant, on the one hand, and pentaerythritol and / or di(trimethylolpropane) on the other hand is preferred. Furthermore, a combination of an organic polyol as a humectant, on the one hand, and pentaerythritol and / or di(trimethylolpropane) on the other hand is preferred. In particular, 1,2-propanediol is preferred as a humectant in combination with pentaerythritol and / or di(trimethylolpropane) as a tetrahydric alcohol. 1,2-propanediol is particularly preferred as a humectant in combination with pentaerythritol as a tetrahydric alcohol.

[0107] It is preferred that the composition contains the humectant in an amount of at least 1% by weight, more preferably at least 5% by weight, further preferably at least 7.5% by weight, most preferably at least 10% by weight, in each case based on the total weight of the composition.

[0108] It is preferred that the composition contains the humectant in an amount of at most 17.5 wt.%, particularly preferably at most 15 wt.%, further preferably at most 13.5 wt.%, in each case based on the total weight of the composition.

[0109] It is preferred that the composition contains the humectant in an amount of 1 to 17.5 wt.%, more preferably 5 to 15 wt.%, further preferably 7.5 to 14.5 wt.%, most preferably about 10 to 13.5 wt.%, in each case based on the total weight of the composition.

[0110] Appropriate humectants in appropriate concentrations improve the COT and the initial writing behavior after short time intervals. In addition, film formation and thus the stability of the smear are positively influenced. A corresponding synergistic effect can be observed, particularly in combination with the tetrahydric alcohol.

[0111] Surfactant / surface-active substance

[0112] It may be provided that the composition further comprises 0.01 to 7% by weight, based on the total weight of the composition, of a surfactant and / or a surface-active substance.

[0113] The surfactant may be an emulsifier, a dispersant, a stabilizer or a substrate wetting agent, preferably a silicone surfactant, a fatty alcohol ether sulfate, in particular Ci2-Ci4 fatty alcohol ether sulfate sodium salt (30 EO), a fatty alcohol ether phosphate, a fatty alcohol phosphate ester, a sulfosuccinate, or the like.

[0114] The surfactant is preferably a nonionic surfactant, an anionic surfactant, or an amphoteric surfactant. Stabilizers within the meaning of the present disclosure are, in particular, surface-active substances that stabilize the colloidal particle system against reagglomeration or coagulation by adsorption at the particle interfaces through steric, electrostatic, or electrosteric interactions, thus preventing sedimentation, syneresis, and increases in grain size and viscosity.

[0115] Nonionic surfactants within the meaning of the present disclosure can be classified according to the following system. This is the "HLB system" (Hydrophilic-Lipophilic Balance) developed by Atlas Chemie. In the HLB system, each emulsifier is assigned a numerical value, called the HLB value. The HLB value indicates the hydrophilic-lipophilic balance.

[0116] All emulsifiers contain both hydrophilic and lipophilic groups. A lipophilic emulsifier has a low HLB value of less than 9.0, and a hydrophilic emulsifier has a high HLB value of more than 11.0. Emulsifiers with low HLB values ​​tend to be oil-soluble, while emulsifiers with high HLB values ​​are water-soluble. For example, a water-soluble emulsifier is used when the final product can be diluted with water. O / W emulsifiers have HLB values ​​between 8 and 18. Hydrophilic emulsifiers with a high HLB value favor the formation of an O / W emulsion.

[0117] In the composition according to the invention, commercially available emulsifiers can preferably be used as non-ionic solubilizers. These are available, for example, as viscous solutions and are prepared by reacting ethylene oxide with hydrogenated castor oil and can be composed, for example, of 90% by weight of hydrogenated castor oil, 5% by weight of 1,2-propylene glycol, and 5% by weight of water. Components of such emulsifiers can also be fatty acid glycerol polyethylene glycol esters and fatty acid polyethylene glycol esters. They represent the hydrophobic part of the products. The hydrophilic part can consist of polyethylene glycol and glycerol ethoxylate.

[0118] Possible emulsifiers that can be considered are preferably non-ionic emulsifiers from the following groups: alcohol fatty acid esters, ethylene fatty acid esters, polyethylene glycol fatty acid esters, glycerol or polyfatty acid esters, sorbitol fatty acid esters, pentaerythritol fatty acid esters, fatty acid esters of glycerol esters, sucrose fatty acid esters, alcohol polyglycol ethers, fatty acid polyglycol ethers,

[0119] Fatty acid ester polyglycol ethers, fatty amine polyglycol ethers, polyglycol ethers of fatty acid alkanolamides, polyglycol ethers of fats and oils, polypropylene glycol polyglycol ethers, lanolin polyglycol ethers, alcohol polypropylene glycol ethers, fatty acid polypropylene glycol ethers, polypropylene glycol ethers of fatty amines, lanolin polypropylene glycol ethers.

[0120] It is preferred that the composition contains the surfactant and / or the surface-active substance in a total amount of at least 0.1 wt.%, particularly preferably at least 0.5 wt.%, furthermore preferably at least 1 wt.%, most preferably at least 1.5 wt.%, in each case based on the total weight of the composition. It is preferred that the composition contains the surfactant and / or the surface-active substance in a total amount of at most 5 wt.%, particularly preferably at most 4 wt.%, furthermore preferably at most 3 wt.%, most preferably at most 2 wt.%, in each case based on the total weight of the composition.

[0121] It is preferred that the composition contains the surfactant and / or the surface-active substance in a total amount of 0.1 to 5 wt.%, preferably 0.5 to 4 wt.%, more preferably 1 to 3 wt.%, most preferably 1.5 to 2 wt.%, for example about 1.5 wt.%, in each case based on the total weight of the composition.

[0122] By using appropriate surfactants and / or surface-active substances in appropriate amounts, improved ink stability and wettability of the substrate to be colored can be achieved.

[0123] Oligomer / polymer with surface-active / pigment-affine groups

[0124] It may be provided that the composition further comprises a compound with surface-active and / or pigment-affine groups, preferably an oligomer with surface-active and / or pigment-affine groups and / or a polymer with surface-active and / or pigment-affine groups, in an amount of 0.01 to 5% by weight, based on the total weight of the composition.

[0125] Pigment-affine groups within the meaning of the present disclosure are anchor groups which are selected depending on the type of pigment, for example whether it is organic or inorganic.

[0126] Surface-active groups within the meaning of the present disclosure are groups having an affinity to surfaces and interfaces, for example of glass, metal, plastic, air, binder particles (mineral or organic) or pigments (mineral or organic).

[0127] Particularly for use together with inorganic or mineral pigments (TiO2, iron oxide, etc.), compounds with anionic or cationic surface-active and / or pigment-affinic groups can be provided, in particular amino, phosphate, quaternary ammonium, sulfonate, carboxylate groups, etc.

[0128] Unmodified organic pigments are usually nonpolar and do not carry any surface charges. Nonionic dispersants with hydrophilic and hydrophobic molecular segments are typically used here, with the nonpolar segments attaching to the pigment surface via van der Waals interactions (=> see HLB value). In this case, the corresponding nonpolar segments are considered pigment-affine groups. Examples of hydrophobic surface-active and / or pigment-affine groups include nonylphenol, isotridecyl, isotristyrene, C13, siloxane, and novolak groups.

[0129] The addition of such compounds with surface-active and / or pigment-affine groups to the pigmented writing fluid has the effect of stabilizing it against agglomeration, sedimentation, syneresis, viscosity drift, color strength fluctuations, color tone changes and other aging effects, or of improving the compatibility between the binder and the colorant.

[0130] It is preferred that the composition contains the compound with surface-active and / or pigment-affine groups in a total amount of at least 0.1 wt.%, particularly preferably at least 0.5 wt.%, further preferably at least 0.75 wt.%, most preferably at least 1 wt.%, in each case based on the total weight of the composition.

[0131] It is preferred that the composition contains the compound with surface-active and / or pigment-affine groups in a total amount of at most 5 wt.%, particularly preferably at most 2.5 wt.%, further preferably at most 1.5 wt.%, most preferably at most 1 wt.%, in each case based on the total weight of the composition.

[0132] It is preferred that the composition contains the compound with surface-active and / or pigment-affinic groups in a total amount of 0.1 to 5 wt.%, particularly preferably 0.5 to 2.5 wt.%, further preferably 0.75 to 1.5 wt.%, most preferably about 1 wt.%, in each case based on the total weight of the composition.

[0133] Other components

[0134] Furthermore, the addition of co-binders (e.g. acrylate polymers without acid number, etc.) and co-film-forming agents (Texanol, butyl glycol, butyl diglycol, etc.) may be provided to further optimize the film properties and other application properties of the ink.

[0135] Waxes may also be added to improve scratch resistance.

[0136] The composition may be specified to be free of urea. In this context, "free of" means that urea has not been actively added to the composition, but is present only as an impurity in quantities that cannot be eliminated by conventional purification processes.

[0137] Version sf arms

[0138] In one embodiment, the invention relates to a composition for coloring a substrate, comprising:

[0139] - 20 to 40 wt% water;

[0140] - 1 to 6% by weight of a tetrahydric alcohol;

[0141] - 0.1 to 0.5% by weight of a biocide;

[0142] - 5 to 15% by weight of a humectant;

[0143] - 1 to 3% by weight of a surfactant and / or a surface-active substance; - 1 to 12.5% ​​by weight of a colorant; and

[0144] - 25 to 45% by weight of a binder; each based on the total weight of the composition; wherein the tetrahydric alcohol has at least 5 carbon atoms.

[0145] In one embodiment, the invention relates to a composition for coloring a substrate, comprising:

[0146] - 20 to 40 wt% water;

[0147] - 1 to 6% by weight of a tetrahydric alcohol;

[0148] - 0.1 to 0.5% by weight of a biocide;

[0149] - 5 to 15% by weight of a humectant;

[0150] - 1 to 3% by weight of a surfactant and / or a surface-active substance;

[0151] - 1 to 12.5% ​​by weight of a colorant; and

[0152] - 25 to 45% by weight of a binder; each based on the total weight of the composition; wherein the tetrahydric alcohol has the following formula (1) where R is a Ci to C18 hydrocarbylene group or a Ci to C i7 Heterohydrocarbylene group having 1 to 3 heteroatoms independently selected from O, N, S and P.

[0153] In one embodiment, the invention relates to a composition for coloring a substrate, comprising:

[0154] - 20 to 40 wt% water;

[0155] - 1 to 6% by weight of a tetrahydric alcohol; - 0.1 to 0.5% by weight of a biocide;

[0156] - 5 to 15% by weight of a humectant;

[0157] - 1 to 3% by weight of a surfactant and / or a surface-active substance;

[0158] - 1 to 12.5% ​​by weight of a colorant; and

[0159] - 25 to 45% by weight of a binder; in each case based on the total weight of the composition; wherein the tetrahydric alcohol is selected from tetrahydric alcohols of the formulas (2) and (3)

[0160] Preparation of the composition for coloring a substrate

[0161] The composition for dyeing a substrate can be prepared using mixing methods known from the prior art, for example, in a mixing vessel, into which the components of the composition for dyeing a substrate are added. The components are continuously and intensively mixed with one another using suitable stirring tools to ensure sufficiently uniform distribution.

[0162] It can be provided that the components of the composition according to the invention for dyeing a substrate are heated for a sufficient period of time, preferably 30 to 60 minutes, preferably to a temperature of 50 to 60 °C, in order to obtain a particularly homogeneous composition, for example in the form of a dispersion.

[0163] After cooling, the soluble components of the composition remain permanently dissolved. Without being bound by this assumption, it can be assumed that the tetravalent alcohol attaches to or is adsorbed onto the particle interfaces present in the composition (pigments and polymer particles) (or attaches to dissolved polymer molecules).

[0164] Use of the composition for coloring a substrate

[0165] The invention further relates to the use of the composition for coloring a substrate according to the present invention for producing a film on a substrate. The use according to the invention can in particular comprise providing a substrate, preferably an absorbent substrate, for example an absorbent writing support, more preferably drawing board or paper, particularly preferably watercolor paper, or a non-absorbent substrate, for example a plastic substrate or a plastic substrate, particularly preferably a plastic or plastic film, or a mixed media substrate, e.g. a combination of an absorbent material and a non-absorbent material, or a canvas. Any other suitable substrate, such as wood, stone, eggshells, etc., can also be provided.

[0166] It can be provided that the composition according to the invention for coloring a substrate is then applied to the substrate.

[0167] The composition can be applied to at least one surface of the substrate. The composition is applied to at least a portion of the corresponding surface. The application can comprise writing, drawing, painting, printing, spraying, or a combination of two or more thereof. The application can be carried out using a brush, a pen, in particular a watercolor pencil, a print head, a fountain pen, or another conventional application device (e.g., an airbrush), or a combination of two or more thereof.

[0168] After application, the applied composition can be dried on the substrate (or partially within it, if part of the composition has penetrated the substrate). Drying can take place at room temperature (23°C) under normal atmospheric pressure. Drying can be assisted by applying heat, passing a gas stream (air stream) over the composition to be dried, applying a vacuum, etc.

[0169] Effect of the invention

[0170] The composition according to the invention for coloring a substrate surprisingly has an excellent cap-off time (COT) and, at the same time, a very short drying time as well as excellent resistance to various types of substrates, in particular also to non-absorbent surfaces.

[0171] In particular, it was surprisingly discovered that the addition of certain tetrahydric alcohols leads to an exceptionally good COT, while the other application properties are not impaired, but are even significantly improved. The two substances di-trimethylolpropane (di-TMP) and pentaerythritol (= pentaerythritol) proved particularly beneficial, triggering a particularly pronounced effect.

[0172] Furthermore, it is surprisingly possible to formulate the composition according to the invention for coloring a substrate without urea, in particular only using substances that—unlike urea—are hydrolysis-stable, do not tend to decompose, and do not affect the long-term pH of the composition. Likewise, the composition according to the invention for coloring a substrate makes it possible to significantly reduce the overall humectant content compared to that of writing fluids known from the prior art. At the same time, the composition according to the invention makes it possible to significantly increase the binder content. This opens up new possibilities and degrees of freedom in the formulation of writing fluids.

[0173] General definitions

[0174] Unless expressly stated otherwise, a feature stated in the singular (a, an...) also includes the plural. For example, if it is stated that the composition according to the invention contains a dye, this also includes the case where the composition contains a mixture of several dyes.

[0175] Unless expressly stated otherwise, terms such as “comprising”, “containing”, etc. include the meanings “essentially comprising”, “essentially containing” or “consisting of”.

[0176] The amounts indicated for the composition according to the invention for coloring a substrate add up to a total amount of too much wt.% and thus give the total amount of the composition.

[0177] Unless expressly stated otherwise, the term “composition” as used herein refers to the “composition of the invention for coloring a substrate”.

[0178] Examples of implementation

[0179] Recipe example i

[0180] 30.0 g water

[0181] 0.10 g Acticide MBT1 (biocide) io,og 1,2-propanediol (humectant)

[0182] 5.0 g pentaerythritol (tetrahydric alcohol)

[0183] 1.50 g Ci2-Ci4 fatty alcohol ether sulfate sodium salt (30E0) (surfactant)

[0184] 24.0 g Neocryl XK-166N (first binder)

[0185] 12.0 g Eastek 1100 (second binder)

[0186] 2.50 g TEXANOL (film-forming agent)

[0187] 16.0 g magenta red preparation (30% PR122) The corresponding components were mixed, heated to 60°C for 30 min and then cooled to room temperature.

[0188] Pentaerythritol

[0189] Recipe example 2

[0190] Formulation Example 2 was prepared as in Formulation Example 1, with the sole exception that di(trimethylolpropane) was used as the tetrahydric alcohol instead of pentaerythritol.

[0191] Di(trimethylolpropane)

[0192] Recipe example 3

[0193] Formulation Example 3 was prepared as in Formulation Example 1, with the sole exception that urea was used as a humectant instead of 1,2-propanediol.

[0194] Recipe example 4

[0195] 36.9 g water

[0196] 0.10 g Acticide MBT1 (biocide)

[0197] 10.0 g 1,2-propanediol (humectant)

[0198] 5.0 g pentaerythritol (tetrahydric alcohol)

[0199] 1.50 g Ci2-Ci4 fatty alcohol ether sulfate sodium salt (30EC) (surfactant)

[0200] 28.0 g Neocryl XK-39 (acidic, alkali-soluble binder)

[0201] 0.7 g triethanolamine (pH adjuster, base) 20.0 g carbon black preparation (34% pigment)

[0202] Comparison recipe 1

[0203] Comparative formulation 1 was prepared as in formulation example 1, with the only exception that a tetrahydric alcohol was used instead of pentaerythritol with erythritol.

[0204] Erythritol

[0205] Comparative formulation 2 Comparative formulation 2 was prepared as in formulation example 1, with the only exception that a hexavalent alcohol (water solubility => 2.4 g / l) was used instead of pentaerythritol with di-pentaerythritol.

[0206] Di-pentaerythritol

[0207] Comparison recipe 3

[0208] Comparative formulation 3 was prepared as in formulation example 1, with the only exception that 8-caprolactam was used instead of pentaerythritol. 8-Caprolactam

[0209] Comparison recipe 4

[0210] Comparative formulation 4 was prepared as in formulation example 1, with the only exception that a hexavalent alcohol was used instead of pentaerythritol with sorbitol.

[0211] Sorbitol

[0212] Comparison recipe 5

[0213] Comparative formulation 5 was prepared as in formulation example 1, with the only exception that 8-caprolactone was used instead of pentaerythritol.

[0214] 8-caprolactone

[0215] Comparison recipe 6

[0216] Comparative formulation 6 was prepared as in formulation example 1, with the only exception that a dihydric alcohol was used instead of pentaerythritol with neopentyl alcohol. Neopentyl alcohol

[0217] Comparison recipe 7

[0218] Comparative formulation 7 was prepared as in formulation example 1, with the only exception that a trihydric alcohol was used instead of pentaerythritol with 1,1,1-trimethylolpropane (TMP).

[0219] TMP

[0220] Comparative recipe 8

[0221] Comparative formulation 8 was prepared in the same way as formulation example 1, with the only exception that a pentahydric alcohol was used instead of pentaerythritol with xylitol.

[0222] Xylitol

[0223] Examples of implementation

[0224] Example 1

[0225] The composition prepared in Formulation Example 1 was filled into test pens (fiber pens with capillary storage). These were then completed with an extruded POM plastic tip (0.5 mm) and stored horizontally overnight.

[0226] A subsequent cap-off test was carried out under standard climatic conditions (23°C, 50% rel.

[0227] Humidity). Three pens were used for each recipe, and the composition of the recipe example was applied to plain paper, using Xerox 8og as the substrate.

[0228] The test pen protectors were removed at the start of the experiment. The test pens were used for writing after intervals of 10 minutes, 30 minutes, 60 minutes, and 10 hours.

[0229] The cap-off test is considered to have been passed with excellent results if the pen spontaneously resumes writing and forms a uniform, opaque line (“+++”). If the pen resumes writing perfectly after a few millimeters, the test is still considered to have been passed (“+”). If the pen no longer writes or only writes after a longer period of scribbling, the test is considered to have been failed (“-”).

[0230] Examples 2 to 4

[0231] Examples 2 to 4 were carried out in the same way as Example 1, with the sole exception that the compositions of Formulation Examples 2 to 4 were used instead of the composition of Formulation Example 1.

[0232] Comparative examples 1 to 8

[0233] Comparative Examples 1 to 8 were carried out in the same way as Example 1, with the sole exception that instead of the composition of Formulation Example 1, the compositions of Comparative Formulations 1 to 8 were used.

[0234] The results of Examples 1 to 4 and the experimental examples are shown in Table 1.

[0235] Table 1:

[0236] +++ Pen writes spontaneously and homogeneously again. => see text on previous page

[0237] ++ Pen writes almost spontaneously and homogeneously again. => see text on previous page

[0238] + Pen resumes writing smoothly after a brief interruption. - Pen resumes writing only after several centimeters

[0239] — Pen no longer writes even after scribbling for a long time

[0240] — The pen was unusable, even after a prolonged recovery period after reattaching the protector. Additionally, the compounds were tested for drying time and water resistance. The test conditions and results are summarized in Table 2.

[0241] Table 2:

[0242] The features of the invention disclosed in the above description and in the claims may be essential both individually and in any combination for the realization of the invention in its various embodiments.

Claims

Patent claims 1. A composition for coloring a substrate, comprising: - 10 to 70 wt% water; - 0.025 to 12.5% ​​by weight of a colorant; and - 0.1 to 10% by weight of a tetrahydric alcohol, based on the total weight of the composition; wherein the tetrahydric alcohol has at least 5 carbon atoms.

2. A composition for coloring a substrate according to claim 1, wherein the coloring is writing, drawing, painting, printing, spraying, or a combination of two or more thereof.

3. Composition for coloring a substrate according to claim 1 or 2, wherein the substrate is an absorbent writing support, preferably drawing board or paper, or a non-absorbent substrate, preferably a plastic film or a plastic film, a mixed media substrate or a canvas.

4. A composition for coloring a substrate according to any one of the preceding claims, wherein the colorant is a dye, a pigment or a mixture of two or more thereof.

5. A composition for coloring a substrate according to any one of the preceding claims, wherein the tetrahydric alcohol has the following formula (1) where R is a Ci to C18 hydrocarbylene group or a Ci to C i7 Heterohydrocarbylene group having 1 to 3 heteroatoms independently selected from O, N, S and P.

6. Composition for coloring a substrate according to any one of the preceding claims, wherein the tetrahydric alcohol is selected from tetrahydric alcohols of formulas (2) and (3) 7- Composition for coloring a substrate according to any one of the preceding claims, wherein the composition further comprises 0.1 to 50% by weight, based on the total weight of the composition, of a binder.

8. A composition for coloring a substrate according to any one of the preceding claims, wherein the composition further comprises 0.01 to 0.5% by weight, based on the total weight of the composition, of a preservative and / or a biocide.

9. A composition for coloring a substrate according to any one of the preceding claims, wherein the composition further comprises 0.01 to 20% by weight, based on the total weight of the composition, of a humectant.

10. A composition for coloring a substrate according to any one of the preceding claims, wherein the composition further comprises 0.01 to 7% by weight, based on the total weight of the composition, of a surfactant.

11. Use of the composition for coloring a substrate according to any one of claims 1 to 10 for producing a film on a substrate.

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