Compositions for coloring substrates and uses thereof - Patents.com

Abstract

The present invention relates to a composition for coloring a substrate. Furthermore, the present invention relates to a method for producing a colored substrate. The present invention also relates to the use of the composition for coloring a substrate to produce a completely or partially base-soluble film on the substrate.

Description

[Technical Field]

[0001] The present invention relates to a composition for coloring a substrate.

[0002] Furthermore, the present invention relates to a method for producing a colored substrate. The present invention also relates to the use of a composition for coloring a substrate to produce a completely or partially base-soluble film on the substrate.

[0003] Background of the Invention Water-based inks are known from the prior art and generally contain water as a solvent and a pigment or water-soluble dye as a colorant, and in addition they generally contain further additives such as surfactants, emulsifiers, preservatives or humectants.

[0004] Pigment inks (paints) have been known for many years, especially for artistic purposes (drawing, sketching, etc.). They are often formulated with plastic dispersions as binders and / or humectants. After the ink begins to dry on the substrate, the painted area becomes water-resistant, i.e., the painted area remains largely intact after contact with water. This is due to the fact that the pigments themselves are water-insoluble and, in addition, migrate with the binder to the absorbent substrate, which can then be difficult to remove again.

[0005] However, in many artistic applications, the use of watercolor techniques is desirable or required, where different paint layers applied adjacent to or on top of each other are blended together to achieve a smooth transition between the paint layers, which is not possible, or is only possible poorly, with paints that exhibit high water resistance.

[0006] Therefore, according to the prior art, sugars, sugar alcohols or corresponding derivatives are often added to binder-containing paints, which allows an improvement in watercolor colorability to be achieved.

[0007] According to the prior art, EP 3613814, for example, describes writing, marking and / or drawing liquids, in particular aqueous, pigmented and / or watercolor-colorable writing, marking and / or drawing liquids, which contain an aqueous pigment preparation, a binder, a base, a sugar or sugar alcohol, and a dispersing wetting agent, which dispersing wetting agent comprises an aqueous solution of a modified polymer having pigment-affinitive groups.

[0008] However, the improvement in watercolor tinting achieved in this way does not come without drawbacks. In the artistic field, two different product series are typically required: one product line contains watercolor-tinted, and therefore water-sensitive, inks, while the second offers permanent inks that dry water-resistant even on non-absorbent substrates. It is not uncommon for more than 60 shades to be offered per product line. Therefore, developing and offering two different product lines is associated with high costs and a lot of effort for manufacturers. End consumers are often also forced to limit themselves to one product line for cost reasons.

[0009] A further drawback is that the coatings produced with the coating compositions according to the prior art easily peel off when overcoated with another coating, causing it to bleed and the peeled coating to stain the tip of the pen.

[0010] Problem to be solved by the invention It is therefore an object of the present invention to provide a composition for coloring a substrate which overcomes the drawbacks of the prior art, in particular a coating composition which allows for adjusting waterfastness and watercolor colorability, i.e. which combines the described advantages of both ink classes and avoids the drawbacks.

[0011] Disclosure of the Invention This problem is solved according to the subject matter of the independent claims. Preferred embodiments emerge from the dependent claims and the following description.

[0012] The problem is particularly solved by a composition for coloring a substrate, which comprises Each based on the total weight of the composition - 20-80% by weight of water; 0.025 to 12.5% ​​by weight of a colorant; and - 5 to 45% by weight of binder Including, The binder has an acid value of at least 40 mg KOH per gram of dry matter; The composition has a pH value of at most 7.5, This is solved by the composition.

[0013] Furthermore, the subject is a method for producing a colored substrate, comprising: - providing a substrate; - applying a composition according to the invention for coloring a substrate to at least a portion of at least one surface of the substrate and optionally drying the composition to obtain a first film; - a watercolor composition comprising: Each based on the total weight of the watercolor composition: - 40 to 99.5% by weight of water; and - 0.5 to 10% by weight of a base providing a watercolor composition comprising: - applying a watercolor composition to at least a portion of the first film to obtain an at least partially dissolved first film; - watercolor-coloring the at least partially dissolved first film to obtain a watercolor-colored film; and - Drying the watercolor-colored film to obtain the second film Including, It is solved by the method.

[0014] Finally, this problem is solved by the use of the composition according to the invention for coloring a substrate, in order to produce a completely or partially base-soluble film on an absorbent substrate.

[0015] Composition for coloring a substrate The compositions according to the invention are suitable for, and preferably proposed for, coloring substrates.

[0016] Coloring The colouring may comprise or advantageously consist of writing, drawing, painting, printing or a combination of two or more thereof.

[0017] Base material The substrate is advantageously an absorbent substrate, such as an absorbent writing medium, more preferably drawing paper or paper, particularly preferably watercolor paper, or a non-absorbent substrate, such as a synthetic or plastic substrate, particularly preferably a synthetic or plastic sheet, or a mixed-media substrate, i.e. a combination of different absorbent and non-absorbent materials, or a canvas. Likewise, any further suitable substrate, such as wood, stone, eggshell, etc., may be proposed.

[0018] water The composition for coloring a substrate according to the present invention contains water in an amount of 20 to 80% by weight based on the total weight of the composition. It is preferable to use deionized water or demineralized water as the water. This makes it possible to avoid the inclusion of unwanted impurities, such as hardness components such as calcium and magnesium.

[0019] It may be proposed that the composition contains water as the main solvent, advantageously in an amount of at least 90% by weight, based on the total amount of solvents in the composition. It is particularly preferred that the composition contains water as the only solvent.

[0020] The composition preferably contains water in an amount of at least 25% by weight, especially preferably at least 30% by weight, most preferably at least 35% by weight, each based on the total weight of the composition.

[0021] Preferably, the composition contains water in an amount of at most 75 wt. %, further preferably at most 70 wt. %, even more preferably at most 65 wt. %, even more preferably at most 60 wt. %, and most preferably at most 55 wt. %, for example at most 52.15 wt. %, each based on the total weight of the composition.

[0022] The composition preferably contains water in an amount of 25 to 75 wt %, more preferably 30 to 60 wt %, and most preferably 35 to 55 wt %, each based on the total weight of the composition.

[0023] With the specified preferred amount of water in the composition, it was possible to achieve optimized coloring on the one hand and practicality on the other hand.

[0024] Further solvents It may be proposed that water is the only solvent in the composition according to the invention for coloring a substrate. Alternatively, it may be proposed that the composition according to the invention for coloring a substrate comprises a further solvent in addition to water.

[0025] It may be proposed that the composition for coloring a substrate contains a 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, each based on the total weight of the composition.

[0026] Preferably, the composition for coloring a substrate contains a further solvent in an amount of at most 40 wt.-%, further preferably at most 35 wt.-%, even more preferably at most 30 wt.-%, more preferably at most 20 wt.-%, and most preferably at most 15 wt.-%, each based on the total weight of the composition.

[0027] The composition for coloring a substrate preferably contains a further solvent in an amount of 1 to 40% by weight, further preferably 5 to 20% by weight, most preferably 10 to 15% by weight, each based on the total weight of the composition.

[0028] Preferably, the further solvent is a water-soluble organic solvent, more preferably an alcohol, even more preferably a polyhydric alcohol, most preferably glycerin or a glycol, such as 1,2-propanediol.

[0029] By adding further solvents to the compositions according to the invention, an improved dissolution behavior of substances that are sparingly soluble in water, such as pigments or other colorants, can be achieved.

[0030] coloring agent The composition according to the present invention for coloring a substrate contains the colorant in an amount of 0.025 to 12.5% ​​by weight, based on the total weight of the composition.

[0031] The colorant is preferably a dye, a pigment, or a mixture of two or more thereof.

[0032] As dyes, in particular water-soluble dyes can be used, advantageously food dyes and / or water-soluble dyes based on acidic and / or basic dyes.

[0033] Dyes mentioned below: Food colours from the following group: E 110, CI 15985, Food Yellow No. 3; E 104, CI 47005, Food Yellow No. 13; E 102, CI 19140, Food Yellow No. 4; E 124, CI 16255, Food Red No. 7; E 127, CI 45430, Food Red No. 14; E 133, CI 42090, Food Blue No. 2; E 131, CI 42051, Food Blue No. 3 and / or Acid dyes from the following groups: 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 has proven to be particularly suitable.

[0034] Basic dyes, advantageously from the group of the xanthene, coumarin and rhodamine dyes, such as Basic Violet 11, Basic Yellow 40, Basic Blue 3, Basic Blue 7, Basic Red 1, Basic Green 1.

[0035] As pigments, advantageously organic pigments can be used, more preferably phthalocyanines, metal complexes, quinacridones, quinophthalones, dioxazines, isoindolines, isoindolinones, benzimidazolones, anthraquinones, arylides, perinones, perylenes, naphthols, diketopyrrolopyrroles or azo pigments, and / or inorganic pigments, such as titanium dioxide, iron oxide, ultramarine or carbon black.

[0036] The colorants specified as preferred allow particularly vivid, intense, and stable coloring to be achieved. The composition preferably contains the colorant in an amount of at least 0.05% by weight, particularly preferably at least 0.075% by weight, each based on the total weight of the composition.

[0037] Preferably, the composition contains a colorant (or colorant blend) in an amount of at most 11.25 wt.-%, further preferably at most 10 wt.-%, even more preferably at most 8.75 wt.-%, more preferably at most 7.5 wt.-%, and most preferably at most 6.25 wt.-%, for example at most 5 wt.-%, each based on the total weight of the composition.

[0038] It may be proposed that the pigments are present and used as components of pigment preparations.

[0039] The composition preferably contains the colorant in an amount of 0.025 to 10 wt %, more preferably 0.05 to 7.5 wt %, and most preferably 0.075 to 5 wt %, each based on the total weight of the composition.

[0040] When the colorant is a dye, the composition preferably contains the colorant in an amount of 0.025 to 3 wt %, more preferably 0.05 to 2 wt %, and most preferably about 0.1 to 1 wt %, each based on the total weight of the composition.

[0041] When the colorant is a pigment, the composition preferably contains the colorant in an amount of 0.25 to 10 wt %, more preferably 1.25 to 7.5 wt %, and most preferably 2.5 to 5 wt %, each based on the total weight of the composition.

[0042] For pastel shades, the pigment content can be reduced to 0.025% by weight.

[0043] The amount of colorant specified as preferred allows optimum coloration to be achieved.

[0044] Binder The composition for coloring a substrate according to the present invention contains a binder in an amount of 5 to 45 wt. % based on the total weight of the composition. The binder has an acid value of at least 40 mg KOH per gram of dry substance. "Dry substance" here refers to the dry substance of the binder, including when the binder is used in the form of an aqueous solution or dispersion. The acid value is measured in accordance with DIN ISO EN 2114, the version in effect as of the priority date.

[0045] The composition for coloring a substrate preferably contains binders in a total amount of at least 10 wt. %, particularly preferably at least 15 wt. %, even more preferably at least 20 wt. %, even more preferably 25 wt. %, and most preferably at least 28 wt. %, each based on the total weight of the composition.

[0046] The composition for coloring a substrate preferably contains binders in a total amount of at most 40% by weight, particularly preferably at most 35% by weight, for example about 30% by weight, each based on the total weight of the composition.

[0047] The composition for coloring a substrate preferably contains a binder in a total amount of 10 to 45 wt %, particularly preferably 20 to 40 wt %, even more preferably 25 to 35 wt %, and most preferably about 28 to 30 wt %, for example about 36 wt %, based on the total weight of the composition.

[0048] The binder may advantageously have an acid number of at least 50 mg KOH / g dry matter, further also preferably at least 60 mg KOH / g dry matter, even more preferably at least 70 mg KOH / g dry matter, more preferably at least 80 mg KOH / g dry matter, even more preferably at least 100 mg KOH / g dry matter, most preferably at least 110 mg KOH / g dry matter, such as about 120 mg KOH / g dry matter.

[0049] The binder may advantageously have an acid number of at most 250 mg KOH / g dry substance, further also preferably at most 220 mg KOH / g dry substance, even more preferably at most 200 mg KOH / g dry substance, more preferably at most 180 mg KOH / g dry substance, even more preferably at most 170 mg KOH / g dry substance, most preferably at most 160 mg KOH / g dry substance, such as about 130 mg KOH or 160 mg KOH / g dry substance.

[0050] The binder may advantageously have an acid number of 50 to 250 mg KOH / g dry substance, further preferably 60 to 220 mg KOH / g dry substance, even more 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, still more preferably 100 to 160 mg KOH / g dry substance, most preferably 110 to 160 mg KOH / g dry substance, such as about 110 to 130 mg KOH / g dry substance, for example about 130 mg KOH / g dry substance or about 160 mg KOH / g dry substance.

[0051] The binder can advantageously be a polymer binder. The binder can advantageously be a polymer resin. It can be proposed that the binder has carboxyl and / or nitrile and / or sulfonyl groups, preferably carboxyl groups. This allows particularly good coloring properties to be achieved, especially with basic dyes. It is advantageously proposed that the binder is a polymer resin containing carboxyl-containing monomer units. It is particularly preferred that the binder comprises or is a polyacrylate resin.

[0052] The binder can be used in the composition as a solid and / or as an aqueous binder preparation, i.e., can be used in these forms for the preparation of the composition. Aqueous binder preparations in this context are in particular binder solutions or binder dispersions.

[0053] It is preferred to use a binder dispersion in the preparation of the compositions according to the invention, in which case the amount of binder in the composition is given based on the total weight of the binder dispersion (including solvent etc.).

[0054] The binder dispersion may be proposed to have a pH value of at most 7.5, advantageously at most 7, further preferably from 1 to 5, even more preferably from 1.5 to 3, most preferably from 1.9 to 2.5. The binder dispersion may be proposed to be a low-viscosity, white or translucent binder particle dispersion in the acidic or neutral pH range (pH≦7), which binder particles gradually dissolve at higher pH values ​​until a clear, transparent, highly viscous solution is formed.

[0055] It may be proposed that the binder dispersion has a solids content of 30 to 60% by weight, advantageously 40 to 50% by weight, particularly preferably 43 to 47% by weight, most preferably 44 to 46% by weight, each based on the total weight of the binder dispersion.

[0056] The binder dispersion may be proposed to have a viscosity of 10 to 80 mPa·s. Viscosity may be measured in accordance with ASTM-D2196, the version in effect as of the priority date.

[0057] The binder dispersion is 1 to 1.2 g / cm 3 , advantageously 1.05 to 1.1 g / cm 3 , e.g., 1.08 g / cm 3 The density can be measured in accordance with the version of ASTM D1475 in effect at the priority date.

[0058] The binder dispersion may be proposed to have a minimum film-forming temperature of 40 to 70° C., advantageously 50 to 60° C., particularly preferably 55 to 59° C., most preferably 56 to 58° C., for example about 57° C. The minimum film-forming temperature may be measured in accordance with ASTM D2354-10, the version in force on the priority date.

[0059] The use of corresponding binder dispersions for the preparation of the compositions according to the invention makes it possible to achieve advantageous mixing with the other components of the composition.

[0060] 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. Exemplary corresponding binders available commercially are, for example, 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). The most remarkable effect according to the invention, namely, particularly easily adjustable water resistance and at the same time good resolubility in the watercolor composition according to the invention, was achieved using the corresponding alkali-soluble polyacrylate dispersions.

[0061] The binder preferably has a glass transition temperature of at least 50° C., advantageously above 50° C. The glass transition temperature can be determined by differential scanning calorimetry (DSC) in accordance with the version of ASTM-E1356 in effect on the priority date. Such a glass transition temperature improves the color stability of the pigmented substrate.

[0062] It is proposed that the binder, particularly the binder dispersion, contains binder particles. It is proposed that the binder particles have an average particle size of at least 50 nm, preferably at least 100 nm. The particle size can be measured by dynamic light scattering in accordance with the version of ASTM E 3247-20 in effect as of the priority date. The binder particles have a correspondingly large diameter, which prevents the ink from penetrating too deeply into the absorbent substrate, thereby improving the watercolor colorability, i.e., the subsequent spreadability of the ink on the substrate.

[0063] pH value The composition according to the invention for colouring a substrate has a pH value of at most 7.5, advantageously less than 7.5, further preferably at most 7.4, even more preferably at most 7.3, even more preferably at most 7.2, even more preferably at most 7.1, most preferably at most 7.0, at most 6.9, especially preferably 6.7, for example at most 6.6, most preferably at most 6.5.

[0064] The composition for coloring a substrate preferably has a pH value of at least 1, especially preferably at least 3, even more preferably at least 4, even more preferably at least 5, more preferably at least 5.5, and most preferably at least 6.

[0065] The composition for coloring a substrate preferably has a pH value of 4 to 7.5, particularly preferably 5 to 7.2, further preferably 5.5 to 7, and most preferably 6 to 6.5.

[0066] pH adjuster Furthermore, it may be proposed that the composition comprises 0.01 to 3% by weight, based on the total weight of the composition, of a pH adjuster, in particular a pH adjuster suitable for adjusting the pH value of the composition for coloring a substrate to at most 7.5, advantageously at most 7. The pH adjuster can be a base or a pH buffer. The pH adjuster is preferably a base. As bases, advantageously, amines can be used, particularly preferably low-odor or odorless amines, such as N-butylaminoethanol (Vantex™, Eastman), 2-butylaminoethanol (Advantex, Eastman), triethanolamine (CSC Jaeklechemie), 2-amino-2-methylpropanol (AMP, Angus Chemie) or tris(hydroxymethyl)aminomethane (Merck).

[0067] The composition preferably contains a pH adjuster in an amount of at least 0.1 wt. %, particularly preferably at least 0.3 wt. %, even more preferably at least 0.5 wt. %, and most preferably at least 0.6 wt. %, each based on the total weight of the composition.

[0068] The composition preferably contains a pH adjuster in an amount of at most 2.5% by weight, particularly preferably at most 2% by weight, even more preferably at most 1% by weight, and most preferably at most 0.75% by weight, each based on the total weight of the composition.

[0069] The composition preferably contains the pH adjuster in an amount of 0.1 to 3 wt %, particularly preferably 0.3 to 2 wt %, even more preferably 0.5 to 1 wt %, and most preferably 0.6 to 0.75 wt %, each based on the total weight of the composition.

[0070] With appropriate amounts of appropriate pH adjusters, the properties of the composition and the films produced therefrom can be tailored.

[0071] Preservatives / Biocides Furthermore, it may be proposed that the composition contain 0.01 to 0.5% by weight of a preservative and / or biocide, based on the total weight of the composition. Preferred preservatives are, for example, mixtures of tert-butyl hydroperoxide and monophenyl glycol ether, particularly preferably mixtures of 12 to 60% by weight of tert-butyl hydroperoxide and 3 to 50% by weight of monophenyl glycol ether, or mixtures of 1,6-dihydroxy-2,5-dioxahexane and tetramethylolacetylenediurea. Such preservatives are particularly suitable for aqueous solutions and emulsions. Preferred biocides are, for example, mixtures of 2-bromo-2-nitropropane-1,3-diol and 2-octyl-2H-isothiazol-3-one, or mixtures of BIT (1,2-benzisothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), and OIT (2-octyl-2H-isothiazol-3-one), which mixtures are particularly effective in preventing fouling. A further preferred biocide is a mixture of CIT / MIT in a weight ratio of 3:1. A further preferred biocide is 2-bromo-2-nitropropane-1,3-diol. A further preferred biocide is 2-octyl-2H-isothiazol-3-one. A further preferred biocide is phenoxyethanol.

[0072] Preferably, the composition contains preservatives and / or biocides in a total amount of at least 0.05% by weight, particularly preferably at least 0.2% by weight, even more preferably at least 0.15% by weight, and most preferably at least 0.1% by weight, each based on the total weight of the composition.

[0073] Preferably, the composition contains preservatives and / or biocides in a total amount of at most 0.4% by weight, particularly preferably at most 0.3% by weight, even more preferably at most 0.25% by weight, and most preferably at most 0.2% by weight, each based on the total weight of the composition.

[0074] The composition preferably contains preservatives and / or biocides in a total amount of 0.05 to 0.4% by weight, particularly preferably 0.1 to 0.3% by weight, even more preferably 0.15 to 0.25% by weight, and most preferably about 0.2% by weight, each based on the total weight of the composition.

[0075] moisturizer Furthermore, the composition may be proposed to contain 0.01 to 20 wt. % of a humectant, based on the total weight of the composition. Preferably, the humectant is an organic polyol and / or polyglycol and / or sugar and / or sugar alcohol and / or corresponding derivative, such as a sugar amine, particularly preferably selected from the group consisting of diethylene glycol, propylene glycol, 1,2-propanediol, glycerin, trimethylolpropane, ditrimethylolpropane, neopentyl glycol, erythritol, pentaerythritol, glucose, fructose, mannose, invert sugar, sucrose, sorbitol, xylitol, mannitol, and mixtures thereof, with 1,2-propanediol being particularly preferred. The composition preferably contains the humectant in an amount of at least 1 wt. %, particularly preferably at least 5 wt. %, even more preferably at least 7.5 wt. %, and most preferably at least 10 wt. %, each based on the total weight of the composition.

[0076] The composition preferably contains a moisturizer in an amount of at most 17.5 wt. %, particularly preferably at most 15 wt. %, and even more preferably at most 13.5 wt. %, each based on the total weight of the composition.

[0077] The composition preferably contains the moisturizer in an amount of 1 to 17.5 wt. %, particularly preferably 5 to 15 wt. %, even more preferably 7.5 to 14.5 wt. %, and most preferably about 10 to 13.5 wt. %, each based on the total weight of the composition.

[0078] The use of a suitable humectant at a suitable concentration improves the application properties of the composition and, in addition, prevents the composition from drying out before use.

[0079] The humectant may also act as a film former and / or cap-off additive. The cap-off additive improves the "cap-off time," which is understood to mean the time during which a writing instrument or writing system can be stored naked, i.e., uncapped, or left unused without drying out and hardening.

[0080] Improved film formation results in a more stable and uniform coating.

[0081] Surfactants / surface-active substances Furthermore, it may be proposed that the composition comprises from 0.01 to 7% by weight of surfactants and / or surface-active substances, based on the total weight of the composition.

[0082] The surfactant may be an emulsifier, dispersant, stabilizer or substrate wetting agent, advantageously a silicone surfactant, a fatty alcohol ether sulfate, a fatty alcohol ether phosphate, a fatty alcohol phosphate ester, a sulfosuccinate, or the like.

[0083] The surfactant is advantageously a nonionic surfactant, an anionic surfactant or an amphoteric surfactant.

[0084] Stabilizers in the sense of the present disclosure are in particular surface-active substances which, by adsorption to the particle interface, stabilize colloidal particle systems against reagglomeration or coagulation by steric, electrostatic or electrosteric interactions, thus preventing sedimentation, syneresis, particle size and viscosity increase.

[0085] Nonionic surfactants within the meaning of the present disclosure can be classified according to the following system: 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.

[0086] All emulsifiers contain both hydrophilic and lipophilic groups. Lipophilic emulsifiers have a low HLB value below 9.0, while hydrophilic emulsifiers have a high HLB value above 11.0. Emulsifiers with low HLB values ​​tend to be oil-soluble, while emulsifiers with high HLB values ​​tend to be water-soluble. For example, if the final product can be diluted with water, a water-soluble emulsifier is used. O / W emulsifiers have an HLB value between 8 and 18. Hydrophilic emulsifiers with high HLB values ​​aid in the formation of O / W emulsions.

[0087] In the composition of the present invention, the nonionic solubilizer is preferably a commercially available emulsifier, which is available as a viscous solution and is produced by reacting ethylene oxide with hydrogenated castor oil, and may consist of, for example, 90% by weight of hydrogenated castor oil, 5% by weight of 1,2-propylene glycol, and 5% by weight of water. The components of this type of emulsifier can also be fatty acid glycerin polyethylene glycol esters and fatty acid polyethylene glycol esters. These form the hydrophobic portion of the product. The hydrophilic portion can consist of polyethylene glycol and glycerin ethoxylate.

[0088] Among all possible emulsifiers, nonionic emulsifiers from the following groups may preferably be considered: 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, 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 polyglycol ethers.

[0089] The composition preferably contains surfactants and / or surface-active substances in a total amount of at least 0.1 wt. %, particularly preferably at least 1 wt. %, even more preferably at least 1.5 wt. %, and most preferably at least 2 wt. %, each based on the total weight of the composition.

[0090] Preferably, the composition contains surfactants and / or surface-active substances in a total amount of at most 5% by weight, particularly preferably at most 4% by weight, even more preferably at most 3% by weight, and most preferably at most 2.5% by weight, each based on the total weight of the composition.

[0091] The composition preferably contains surfactants and / or surface-active substances in a total amount of 0.1 to 5 wt. %, preferably 1 to 4 wt. %, more especially preferably 1.5 to 3 wt. %, most preferably 2 to 2.5 wt. %, for example 2.1 wt. %, each based on the total weight of the composition.

[0092] By adding appropriate surfactants and / or surface-active substances in appropriate amounts, improvements in ink stability and wetting of the substrate to be pigmented can be achieved.

[0093] Oligomers / polymers with surface-active / pigment-affinity groups Furthermore, it may be proposed that the composition comprises a compound having surface-active and / or pigment-affinitive groups, advantageously an oligomer having surface-active and / or pigment-affinitive groups and / or a polymer having surface-active and / or pigment-affinitive groups, in an amount of 0.01 to 5% by weight, based on the total weight of the composition.

[0094] Pigment-affinitive groups in the sense of the present disclosure are anchoring groups that are selected depending on the type of pigment, for example whether it is organic or inorganic.

[0095] Surface active groups in the sense of the present disclosure are groups that have an affinity for surfaces and interfaces of glass, metal, plastic, air, binder particles (mineral or organic) or pigments (mineral or organic).

[0096] In particular, when used in combination with inorganic or mineral pigments (TiO2, iron oxides, etc.), compounds having anionic or cationic surface-active and / or pigment-affinity groups may be proposed, in particular amino groups, phosphate groups, quaternary ammonium groups, sulfonate groups, sulfonamide groups, carboxylate groups, etc.

[0097] Unmodified organic pigments are often non-polar and have no surface charge. Non-ionic dispersants with hydrophilic and hydrophobic molecular moieties are often used, with the non-polar moieties attaching to the pigment surface via van der Waals interactions (see HLB values). The corresponding non-polar moieties are considered pigment-affinity groups. Exemplary hydrophobic surface-active groups and / or pigment-affinity groups are, for example, nonylphenol, isotridecyl, isotristyrene, C 13or further branched or linear fatty acid or fatty alcohol groups, siloxane, novolak groups.

[0098] The addition of such compounds having surface-active and / or pigment-affinity groups to pigment writing fluids has the effect of stabilizing the effects of aggregation, sedimentation, syneresis, viscosity drift, changes in color strength, changes in color tone and further deterioration, or improving the compatibility between binders and colorants.

[0099] The composition preferably contains a compound having a surface-active group and / or a pigment-affinity group in a total amount of at least 0.1 wt %, particularly preferably at least 0.5 wt %, even more preferably at least 0.75 wt %, and most preferably at least 1 wt %, each based on the total weight of the composition.

[0100] The composition preferably contains at most 5% by weight of compounds having surface-active groups and / or pigment-affinitive groups, particularly preferably at most 2.5% by weight, even more preferably at most 1.5% by weight, and most preferably at most 1% by weight, each based on the total weight of the composition.

[0101] The composition preferably contains a compound having a surface active group and / or a pigment-affinity group in a total amount of 0.1 to 5 wt %, particularly preferably 0.5 to 2.5 wt %, even more preferably 0.75 to 1.5 wt %, and most preferably about 1 wt %, based on the total weight of the composition.

[0102] Further ingredients Furthermore, to further optimize the film properties and other use characteristics of the ink, the addition of co-binders (such as, for example, acrylate polymers without acid values) and co-film formers (such as Texanol, butyl diglycol, etc.) may be suggested.

[0103] Likewise, in order to improve the scratch resistance, the addition of waxes and further conventional additives may be proposed.

[0104] Embodiment In one embodiment, the present invention provides a composition for coloring a substrate, comprising: Each based on the total weight of the composition - 20-80% by weight of water; - 0.1-0.5% by weight of biocides; - 0.1 to 20% by weight of a humectant; - 0.1 to 3% by weight of a pH adjuster; - 0.1 to 7% by weight of surfactants and / or surface-active substances; 0.1 to 50% by weight of a colorant; and - 5-45% by weight of binder; Including, The binder has an acid value of at least 40 mg KOH per gram of dry matter; The composition has a pH value of at most 7.5, It relates to a composition.

[0105] In one embodiment, the present invention provides a composition for coloring a substrate, comprising: Each based on the total weight of the composition - 25-75% by weight of water; - 0.1-0.5% by weight of biocides; - 2-18% by weight of humectant; - 0.1 to 4% by weight of a pH adjuster; - 0.1 to 7% by weight of surfactants and / or surface-active substances; - 0.1 to 45% by weight of colorants; - 10-40% by weight of binder; Including, The binder has an acid value of at least 50 mg KOH per gram of dry matter; The composition has a pH value of at most 7.5, It relates to a composition.

[0106] Preparation of a composition for coloring a substrate The composition for coloring a substrate can be prepared by mixing methods known from the prior art, for example in a mixing vessel in which the components of the composition for coloring a substrate are added, and in this case the components are vigorously mixed with one another using a suitable stirring tool in order to disperse them sufficiently homogeneously.

[0107] Method for producing a pigmented substrate Still further, the present invention relates to a method for producing a pigmented substrate.

[0108] Substrate provision In a first method step, a substrate is provided for this purpose, preferably an absorbent substrate, such as an absorbent writing medium, more preferably drawing paper or paper, particularly preferably watercolor paper, or a non-absorbent substrate, such as a synthetic or plastic substrate, particularly preferably a synthetic or plastic sheet, or a mixed-media substrate, i.e., a combination of different absorbent and non-absorbent materials, or a canvas. Likewise, any further suitable substrate, such as wood, stone, eggshell, etc., may be proposed.

[0109] The compositions according to the invention can be used especially on non-absorbent substrates, i.e., they exhibit excellent watercolor coloring properties even on such substrates. Unlike prior art compositions, the compositions according to the invention exhibit excellent water resistance, regardless of the absorbency of the substrate. In particular, the coatings obtained using the compositions according to the invention dry quickly and oil-resistant, even on non-absorbent substrates.

[0110] Application of the composition for coloring the substrate and optional drying In a subsequent second method step, the composition according to the invention for coloring the substrate is then applied to the substrate.

[0111] The composition is applied to at least one surface of the substrate. In this case, the composition is applied to at least a portion of the corresponding surface. The application can include writing, drawing, painting, printing, spraying, or a combination of two or more thereof. The application can be performed using a paintbrush, a pen, especially a watercolor pen, a printhead, a fountain pen holder, or other conventional application tool, or a combination of two or more thereof.

[0112] The application may also include the further step of applying a further coating on top of and / or next to the first coating, and it may be proposed in particular that this further coating comprises a colorant different from the colorant in the first film. The further coating may be obtained by a second composition according to the invention for coloring a substrate, which second composition according to the invention for coloring a substrate comprises a colorant different from the colorant in the first film. The first coating and the optional further coating are transferred to the first film as follows.

[0113] After application, the applied composition can optionally be dried on the substrate (or partially within the substrate if part of the composition has penetrated the absorbent substrate). Drying can be carried out at room temperature (23°C) under atmospheric pressure. Drying can be assisted by the application of heat, by passing a gas stream (air stream) through the composition to be dried, by applying a vacuum, etc.

[0114] After drying is complete, a first film is obtained on the substrate (or optionally partially within the absorbent substrate, if part of the composition has penetrated into the absorbent substrate), which is substantially water-resistant, advantageously water-resistant, and can be overcoated with other inks without "bleeding" through, i.e., covered by other inks (advantageously other compositions for coloring the substrate) without intermixing.

[0115] Alternatively, the applied composition for coloring a substrate according to the present invention can be used to obtain a first film without a drying step, which is then watercolor-colored as described below. Furthermore, this method includes providing a watercolor composition comprising 40 to 99.5 wt. % water and 0.5 to 10 wt. % base, each based on the total weight of the watercolor composition.

[0116] The watercolor composition can be provided by the manufacturer of the composition for coloring a substrate according to the present invention, and sold together with the composition for coloring a substrate, for example, in the form of a kit in which the composition for coloring a substrate and the watercolor composition are sold separately from each other, for example, in separate vials or applicators. In such cases, an amine-based base is preferred in the watercolor composition. Alternatively, the manufacturer of the composition for coloring a substrate according to the present invention can sell only this composition, along with instructions for preparing the watercolor composition using means freely available to the end consumer. In such cases, for example, sodium bicarbonate or sodium carbonate is a preferred base.

[0117] water It is preferable to use deionized or demineralized water, which makes it possible to avoid unwanted impurities that may affect, for example, the stability and durability (hardness components) of the watercolor composition.

[0118] It may be proposed that the watercolor composition contains water as the main solvent, advantageously in an amount of at least 90% by volume, based on the total amount of solvents in the watercolor composition. It is especially preferred that the watercolor composition contains water as the exclusive solvent.

[0119] The watercolor composition preferably contains water in an amount of at least 50% by weight, particularly preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, and most preferably at least 95% by weight, each based on the total weight of the watercolor composition.

[0120] The watercolor composition preferably contains water in an amount of up to 99% by weight, based on the total weight of the watercolor composition.

[0121] The watercolor composition preferably contains water in an amount of 50 to 99.5 wt. %, more preferably 90 to 99.5 wt. %, and most preferably 95 to 99 wt. %, each based on the total weight of the watercolor composition. Optimized redissolution of the first film can be achieved using the preferred amount of water specified in the watercolor composition.

[0122] base As bases, advantageously, amines, low-odor amines or odorless amines can be used, such as N-butylaminoethanol (Vantex™, Eastman), 2-butylaminoethanol (Advantex, Eastman), triethanolamine (CSC Jaeklechemie), 2-amino-2-methylpropanol (AMP, Angus Chemie) or tris(hydroxymethyl)aminomethane (Merck). Likewise, as bases, sodium hydrogen carbonate (baking powder, natron) or sodium carbonate (soda) or ammonium hydrogen carbonate (Hirschhorn salt) can also be used.

[0123] The watercolor composition preferably contains a base in an amount of at least 0.1% by weight, particularly preferably at least 1% by weight, even more preferably at least 2% by weight, and most preferably at least 3% by weight, each based on the total weight of the watercolor composition.

[0124] The watercolor composition preferably contains at most 6% by weight of base, particularly preferably at most 5% by weight, even more preferably at most 4% by weight, and most preferably at most 3% by weight, each based on the total weight of the watercolor composition.

[0125] The watercolor composition preferably contains the base in an amount of 0.1 to 6% by weight, particularly preferably 1 to 5% by weight, even more preferably 2 to 4% by weight, and most preferably about 3% by weight, based on the total weight of the watercolor composition.

[0126] Preservatives / Biocides Furthermore, the watercolor composition may be proposed to contain 0.01 to 0.5% by weight of a preservative and / or biocide, based on the total weight of the watercolor composition.

[0127] Preferred preservatives include mixtures of tert-butyl hydroperoxide and monophenyl glycol ether, particularly preferably mixtures of 12 to 60% by weight of tert-butyl hydroperoxide and 3 to 50% by weight of monophenyl glycol ether, or mixtures of 1,6-dihydroxy-2,5-dioxahexane and tetramethylolacetylenediurea. Such preservatives are particularly suitable for aqueous solutions and emulsions. Preferred biocides include mixtures of 2-bromo-2-nitropropane-1,3-diol and 2-octyl-2H-isothiazol-3-one, or mixtures of BIT (1,2-benzisothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), and OIT (2-octyl-2H-isothiazol-3-one), which are particularly effective in preventing contamination. Another preferred biocide is a mixture of CIT / MIT in a weight ratio of 3:1. A further preferred biocide is 2-bromo-2-nitropropane-1,3-diol. A further preferred biocide is 2-octyl-2H-isothiazole-3-. A further preferred biocide is phenoxyethanol.

[0128] The watercolor composition preferably contains a total amount of preservatives and / or biocides of at least 0.05% by weight, particularly preferably at least 0.1% by weight, even more preferably at least 0.15% by weight, and most preferably at least 0.2% by weight, each based on the total weight of the watercolor composition.

[0129] The watercolor composition preferably contains preservatives and / or biocides in a total amount of at most 0.4% by weight, particularly preferably at most 0.3% by weight, even more preferably at most 0.25% by weight, and most preferably at most 0.2% by weight, each based on the total weight of the watercolor composition.

[0130] The watercolor composition preferably contains a total amount of preservatives and / or biocides of 0.05 to 0.4% by weight, particularly preferably 0.1 to 0.3% by weight, even more preferably 0.15 to 0.25% by weight, and most preferably about 0.2% by weight, based on the total weight of the watercolor composition.

[0131] Binder Furthermore, it may be proposed that the watercolor composition contains 0.1 to 50% by weight of a binder.

[0132] The binder is preferably an alkali-stable binder. It may be proposed to use gum arabic, a wax, such as beeswax, or a synthetic polymer binder, preferably a polyacrylate, polyurethane, polyester, sulfopolyester, maleate resin, or a copolymer of two or more thereof, polyvinyl alcohol, polyvinylpyrrolidone, etc. For example, the binder may be Acronal 12DE (a dispersion of acrylonitrile-acrylic acid ester copolymer, BASF), Neocryl XK166N (a dispersion of acrylic styrene copolymer, Covestro), NeoRez R-3972 (a polyurethane dispersion, Covestro), Eastek 1000 (a colloidal solution of sulfopolyester, Eastman), or Mowiol 4-88 (a polyvinyl alcohol hardening resin, Kuraray).

[0133] The watercolor composition preferably contains binders in a total amount of at least 1% by weight, particularly preferably at least 5% by weight, even more preferably at least 10% by weight, and most preferably at least 20% by weight, each based on the total weight of the watercolor composition.

[0134] The watercolor composition preferably contains binders in a total amount of at most 45% by weight, more preferably at most 40% by weight, particularly preferably at most 30% by weight, for example about 28% by weight, each based on the total weight of the watercolor composition.

[0135] The watercolor composition preferably contains a binder in a total amount of 1 to 45% by weight, particularly preferably 5 to 40% by weight, even more preferably 10 to 35% by weight, and most preferably about 20 to 30% by weight, for example about 28% by weight, based on the total weight of the watercolor composition.

[0136] Surfactants / surface-active substances Furthermore, the watercolor composition may be proposed to contain 0.01 to 7% by weight of surfactants and / or surface-active substances, based on the total weight of the watercolor composition.

[0137] The surfactant may be an emulsifier, dispersant, stabilizer or substrate wetting agent, advantageously a silicone surfactant, a fatty alcohol ether sulfate, a fatty alcohol ether phosphate, a fatty alcohol phosphate ester, a sulfosuccinate, a sugar surfactant, or the like.

[0138] The surfactant is advantageously a nonionic surfactant, an anionic surfactant or an amphoteric surfactant.

[0139] Stabilizers in the sense of the present disclosure are surface-active substances which, in particular by adsorption to the particle interface, stabilize colloidal particle systems against reagglomeration or coagulation by steric, electrostatic or electrosteric interactions, thus preventing sedimentation, syneresis, particle size and viscosity increase.

[0140] Nonionic surfactants within the meaning of the present disclosure can be classified according to the following system: 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.

[0141] All emulsifiers contain both hydrophilic and lipophilic groups. Lipophilic emulsifiers have a low HLB value below 9.0, while hydrophilic emulsifiers have a high HLB value above 11.0. Emulsifiers with low HLB values ​​tend to be oil-soluble, while emulsifiers with high HLB values ​​tend to be water-soluble. For example, if the final product can be diluted with water, a water-soluble emulsifier is used. O / W emulsifiers have an HLB value between 8 and 18. Hydrophilic emulsifiers with high HLB values ​​aid in the formation of O / W emulsions.

[0142] In the watercolor compositions of the present invention, the nonionic solubilizer is preferably a commercially available emulsifier, available as a viscous solution, produced by the reaction of ethylene oxide with hydrogenated castor oil, which may consist of, for example, 90% by weight of hydrogenated castor oil, 5% by weight of 1,2-propylene glycol, and 5% by weight of water. The components of this type of emulsifier can also be fatty acid glycerin polyethylene glycol esters and fatty acid polyethylene glycol esters. These form the hydrophobic portion of the product. The hydrophilic portion can consist of polyethylene glycol and glycerin ethoxylate.

[0143] Possible emulsifiers that may 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, 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 polyglycol ethers.

[0144] The watercolor composition preferably contains surfactants and / or surface-active substances in a total amount of at least 0.1% by weight, particularly preferably at least 1% by weight, even more preferably at least 1.5% by weight, and most preferably at least 2% by weight, each based on the total weight of the watercolor composition.

[0145] The watercolor composition preferably contains surfactants and / or surface-active substances in a total amount of at most 5% by weight, particularly preferably at most 4% by weight, even more preferably at most 3% by weight, and most preferably at most 2.5% by weight, each based on the total weight of the watercolor composition.

[0146] The watercolor composition preferably contains surfactants and / or surface-active substances in a total amount of 0.1 to 5% by weight, preferably 1 to 4% by weight, more preferably 1.5 to 3% by weight, most preferably 2 to 2.5% by weight, for example 2.1% by weight, each based on the total weight of the watercolor composition.

[0147] By adding appropriate surfactants and / or surface-active substances in appropriate amounts, improvements in ink stability and wetting of the substrate to be watercolor-colored can be achieved.

[0148] Application and watercolor coloring The provided watercolor composition is applied to at least a portion of the first film using a paintbrush, a pen, particularly a watercolor pen, a printhead, a fountain pen holder, or other conventional applicator, or a combination of two or more thereof.

[0149] By applying the watercolor composition to the first film, the first film is at least partially "dissolved," i.e., at least a portion of the solids from the composition for coloring a substrate contained in the first film upon drying, particularly the corresponding portion of the colorant and binder having an acid value of at least 40 mg KOH / g, are dissolved in the watercolor composition. Because the acid value of the binder contained in the composition for coloring a substrate is at least 40 mg KOH / g, the solid components of the composition precipitated with this binder are much more soluble or redispersible in alkaline (pH > 7) than in neutral or acidic (pH ≤ 7) conditions. Therefore, the base contained in the watercolor composition assists the "dissolution" process.

[0150] The existing carboxyl groups on the acidic polymer are completely neutralized by the base of the watercolor composition, thereby achieving or significantly increasing the water solubility of the polymer.

[0151] Watercolor coloring here is understood to mean that different paint layers (of the same or different paints) applied adjacent to or on top of each other are blended together so that a smooth transition between the paint layers is achieved.

[0152] The step (1) of applying a watercolor composition to at least a portion of the first film, thereby obtaining an at least partially dissolved first film, and the step (2) of watercolor-coloring the at least partially dissolved first film, thereby obtaining a watercolor-colored film, can at least partially overlap, i.e., can be performed at least partially simultaneously. This means, in particular, that the dissolved film can also be watercolor-colored during the step of applying the watercolor coating composition.

[0153] Drying After watercolor application, the watercolor-colored film is dried on the substrate (or partially within the substrate, if part of the composition has penetrated the substrate). Drying can be carried out at room temperature (23°C) under atmospheric pressure. Drying can be accelerated by applying heat, passing a gas stream (air stream) through the composition to be dried, applying a vacuum, etc.

[0154] When an amine compound, particularly a readily volatile amine compound, is used as the base in the watercolor composition, the drying step results in reprotonation of the binder having an acid number of at least 40 mg KOH per gram of dry matter, because in the drying step the amine compound is again liberated from the ammonium compound obtained by reaction of the amine compound with the protons of the binder having an acid number of at least 40 mg KOH per gram of dry matter when the watercolor composition is applied to at least a portion of the first film, and evaporates or volatilizes.

[0155] If other bases, such as alkali metal hydroxides or other less volatile or non-volatile bases, are used in the watercolor composition, it may be suggested to provide an additional fixing step after drying, which may consist of applying, for example, an aqueous acidic solution to the watercolor-colored film, for example using a "fixing spray".

[0156] Alternatively, a lacquer coating can be proposed using corresponding aqueous solutions of polyvalent metal salts (salts of zinc, aluminum, iron, magnesium, calcium, etc.) which form sparingly soluble compounds with the acidic binders of the watercolor composition.

[0157] The second film thus obtained can exhibit a particularly smooth paint transfer and can also be newly water resistant.

[0158] Use of the composition for coloring a substrate Furthermore, the present invention relates to the use of a composition according to the invention for coloring a substrate, in order to produce a completely or partially base-soluble film on the substrate.

[0159] The use according to the invention can in particular involve the provision of a substrate, advantageously an absorbent substrate, such as an absorbent writing medium, more preferably drawing paper or paper, particularly preferably watercolor paper, or a non-absorbent substrate, such as a synthetic or plastic substrate, particularly preferably a synthetic or plastic sheet, or a mixed-medium substrate, i.e. a combination of different absorbent and non-absorbent materials, or a canvas. Likewise, any further suitable substrate, such as wood, stone, eggshell, etc., can be proposed.

[0160] It may then be proposed to apply to the substrate a composition according to the invention for colouring the substrate.

[0161] In this case, the composition is applied to at least a portion of the corresponding surface. The application can include writing, drawing, painting, printing, spraying, or a combination of two or more thereof. The application can be carried out using a paintbrush, a pen, especially a watercolor pen, a printhead, a fountain pen holder, or other conventional application tools (e.g., airbrush), or a combination of two or more thereof.

[0162] The application can also include the further step of applying a further coating on top of and / or next to the first coating, and in particular it can be proposed that this further coating contains a colorant different from the colorant in the first film. The further coating can likewise be obtained by the composition according to the invention for coloring a substrate, and this further coating contains a colorant different from the colorant in the first film. The first coating and the optional further coating are transferred to the first film as follows.

[0163] After application, the applied composition is allowed to dry on the substrate (or partially within the substrate if part of the composition has penetrated the substrate). Drying can be carried out at room temperature (23°C) under atmospheric pressure. Drying can be accelerated by the application of heat, by passing a gas stream (air stream) through the composition to be dried, by applying a vacuum, etc.

[0164] Effect of the invention The composition according to the invention for coloring a substrate is surprisingly capable of adjusting waterfastness and watercolor colorability, i.e. it has the advantages of a waterfast binder-containing ink as well as of an easily watercolor-colorable ink, while avoiding their disadvantages.

[0165] The composition and its use according to the present invention, especially its use in the method according to the present invention, allows the combination of two different types of ink without losing the advantages of both groups. It is possible to produce a product item that leaves it up to the end user to decide how they ultimately want to use the product. In addition, even after completing the work, the user can decide whether they want to further process it later using watercolor techniques.

[0166] A further advantage is that watercolor paintings finished in this manner remain water resistant.

[0167] A further advantage is that multiple layers of paint can be applied one on top of the other without "bleeding" through the underlying paint layers. This means that, for example, a pre-drawn outline with a dark paint can be followed by a lighter color without blurring the outline (e.g., a combination of yellow and black). This is not possible with prior art compositions. Similarly, applying a top coat to a dried paint layer advantageously does not further smear the tip of the writing instrument, thus eliminating the need for tedious cleaning procedures.

[0168] General definition Unless specifically stated otherwise, features described in the singular also include the plural, for example, if a composition according to the invention is described as containing a dye, the composition also includes instances in which it contains a mixture of dyes.

[0169] Unless specifically stated otherwise, the terms "comprise", "contain", and the like include the meanings "essentially comprise", "essentially contain" or "consist of".

[0170] All amounts listed for compositions according to the invention for coloring a substrate add up to a total of 100% by weight and therefore the total amount of the composition.

[0171] Unless otherwise specified, the term "composition" as used herein means "a composition according to the present invention for coloring a substrate."

[0172] Example Mixing example 1 (black ink): water 35.0g 0.2g of a mixture of 2.5% BIT / 4% MIT / 1% OIT (biocide) 1,2-propanediol 10.0g Sorbitol 4.0g Triethanolamine 0.60g C 12 ~C 15 - Alcohol-ethoxylate-phosphate ester, neutralized with DMEA (compounds with surface-active and / or pigment-affinity groups) 1.0 g 0.60g BYK-Chemie BYK-348 (silicone surfactant) Carbon black pigment 20.0g Covestro's Neocryl XK-39 (alkali-soluble polyacrylate dispersion → acid value (SZ) = 130 mg KOH / g dry substance) 28.6 pH value of the entire composition = 6.6

[0173] Blending example 2 (magenta ink): Water 52.15g 0.2g of a mixture of 2.5% BIT / 4% MIT / 1% OIT (biocide) 1,2-propanediol 12.0g Xylitol 3.0g Triethanolamine 0.75g Cognis' Disponil FES 77(C 12 ~C 14 1.0 g of fatty alcohol ether sulfate sodium salt (30EO) (a compound having a surface-active group and / or a pigment-affinity group) Evonic Tego Wet KL 245 (silicone surfactant) 0.60g 0.30g of pigment "Basic Violet 11:1" Joncryl 661, BASF (alkali-soluble polyacrylate dispersion, SZ = 154 mg KOH per gram of dry substance) 30.0 g pH value of the entire composition = 6.5

[0174] composition for watercolor Water 60.0% 0.1% mixture (biocide) of 2.5% BIT / 4% MIT / 1% OIT by weight Glycerin 7.5% Acronal 12DE (binder) 28% Advantex (base) 3.0% Disponil OC25 (Oleyl-Cetyl-Ethoxylate (C16 / C18) (25EO)) (Surfactant) 1.4%

[0175] Experimental Examples and Procedures Substrate: Paper, Hahnemühle, watercolor paper 450 g / m 2 , product number: 10628410 Applicator: Pentel "Aqua Brush Water Tank Pinsel Broad" Contact weight: 70g Color density measuring device: PANTONE CAPSURE

[0176] Procedure: First, six lines, each 1 mm wide, were drawn on the substrate (primer coat) using the watercolor ink according to formulation example 1 shown above, also spaced at regular intervals of 3 mm. The drawn lines were allowed to dry for 1 hour in a standard climate (defined according to DIN EN ISO 139 → 23°C, 50% relative humidity).

[0177] Subsequently, two successive coats of water or the watercolor composition shown above were applied to the base coat in short succession using the applicator.

[0178] Experimental Example 1: Fill the applicator with water

[0179] Experimental Example 2: The applicator is filled with a watercolor composition according to the present invention.

[0180] evaluation: The color density of the unpainted gaps between the colored lines was measured assuming a color density of 0%, whereas the colored lines were assumed to have a color density of 100%.

[0181] [Table 1]

[0182] As shown in Table 1, the color density of the gap after treatment with tap water remains unchanged at 0%.

[0183] The color strength of the gap after treatment with the watercolor composition is about 40%.

[0184] The features of the invention disclosed in the above description and in the claims may be important, both alone and in any combination, for realizing various embodiments of the invention.

Claims

1. 1. A composition for coloring a substrate, comprising: Each based on the total weight of the composition: - 20 to 80% by weight of water; - 0.025 to 12.5% ​​by weight of a colorant; and - 5 to 45% by weight of binder Including, the binder has an acid value of at least 40 mg KOH / g dry matter; The composition has a pH value of at most 7.

5. composition.

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

3. 3. A composition for coloring a substrate according to claim 1 or 2, wherein the substrate is an absorbent writing medium, preferably drawing paper or paper, or a non-absorbent substrate, preferably a synthetic or plastic sheet, a mixed-media substrate, or a canvas.

4. 4. The composition for coloring a substrate according to claim 1, wherein the colorant is a dye, a pigment, or a mixture of two or more thereof.

5. 5. The composition for coloring a substrate according to claim 1, wherein the binder has an acid number of at least 80 mg KOH per gram of dry matter.

6. 6. The composition for coloring a substrate according to claim 1, wherein the binder comprises binder particles, the binder particles advantageously having an average particle size of at least 50 nm, particularly preferably at least 100 nm.

7. 7. A composition for coloring a substrate according to claim 1, wherein the binder comprises a polyacrylate resin, preferably polyacrylate resin particles.

8. The composition for coloring a substrate according to any one of claims 1 to 7, having a pH value in the range of 5.5 to 7.

0.

9. 9. The composition for coloring a substrate according to claim 1, further comprising 0.01 to 3 wt. % of a pH adjuster, based on the total weight of the composition.

10. 10. The composition for coloring a substrate of claim 9, wherein the pH adjuster is a base.

11. 11. The composition for coloring a substrate according to any one of claims 1 to 10, further comprising 0.01 to 5 wt. % of a preservative and / or biocide, based on the total weight of the composition.

12. 12. The composition for coloring a substrate according to any one of claims 1 to 11, further comprising 0.01 to 20% by weight of a humectant, based on the total weight of the composition.

13. 13. The composition for coloring a substrate according to any one of claims 1 to 12, further comprising 0.01 to 7 wt. % of a surfactant, based on the total weight of the composition.

14. 1. A method for producing a pigmented substrate, comprising: - providing a substrate; - applying a composition for coloring a substrate according to any one of claims 1 to 13 to at least a part of at least one surface of said substrate and optionally drying said composition to obtain a first film; - a watercolor composition, Each of the amounts is based on the total weight of the watercolor composition. - 40 to 99.5% by weight of water; and 0.5 to 10% by weight of a base providing a watercolor composition comprising: - applying said watercolor composition to at least a portion of said first film to obtain an at least partially dissolved first film; - watercolor-coloring the at least partially dissolved first film to obtain a watercolor-colored film; and - drying the watercolor-tinted film to obtain a second film; A method comprising:

15. Use of a composition for coloring a substrate according to any one of claims 1 to 13 for producing a completely or partially base-soluble film on a substrate.

Images