Composition for dyeing a substrate and use thereof

Abstract

The present invention relates to a composition for dyeing a substrate. The invention also relates to a method for producing a dyed substrate. The invention likewise relates to the use of the composition for dyeing a substrate for producing a completely or partially alkali-soluble film on a substrate.

Description

Technical Field

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

[0002] The present invention also relates to a method for preparing a dyed substrate. The present invention also relates to the use of the composition for dyeing a substrate for preparing a completely or partially alkali-soluble film on a substrate. Background Art

[0003] Water-based inks are known in the prior art and typically comprise water as a solvent and a pigment or water-soluble dye as a colorant. In addition, they typically also comprise other additives, such as surfactants, emulsifiers, preservatives or wetting agents.

[0004] Pigment-based inks (dyes) have been known for many years, particularly for artistic applications (painting, drawing, etc.). These inks are typically formulated with a plastic dispersion as a binder and / or a wetting agent. After the ink has dried on the substrate, the ink application is water-resistant, meaning it remains largely intact after contact with water. This is because the pigment itself is insoluble in water and, along with the binder, migrates into the absorbent substrate, making it difficult to dissolve out.

[0005] However, in many artistic applications, it's desirable or necessary to use a watercolor technique. In these cases, different ink layers applied adjacent to each other or one above the other would blend together to create a smooth transition between the layers. However, with dyes that are highly water-resistant, this is either impossible or highly unlikely.

[0006] Therefore, according to the prior art, dyes, sugars, sugar alcohols or corresponding derivatives containing binders are usually added. In this way, improved watercolor properties can be achieved.

[0007] For example, EP 3 613 814 B1 describes a writing, marking and / or drawing fluid, in particular an aqueous, pigment-based and / or watercolor-compatible writing, marking and / or drawing fluid, which comprises an aqueous pigment preparation, a binder, an alkali, a sugar or a sugar alcohol and a dispersing wetting agent, wherein the dispersing wetting agent is an aqueous solution of a modified polymer having pigment-affinity groups.

[0008] However, the improved watercolor properties achieved in this way have drawbacks. In the art field, two different product lines are often required: the first line contains watercolor-sensitive inks, while the second line offers permanent inks that dry water-resistant even on non-absorbent substrates. In many cases, each line offers over 60 different shades. Therefore, developing and offering two different product lines is costly and labor-intensive for manufacturers. End consumers are often forced to limit themselves to a single product line for cost reasons.

[0009] Another disadvantage is that the daubs produced using the dye compositions prepared according to the prior art readily dissolve when painted over with another color and smear the other color, or the pen tip becomes stained by the dissolved color.

[0010] Purpose of the Invention

[0011] Therefore, the object of the present invention is to provide a composition for dyeing a substrate which overcomes the disadvantages of the prior art, in particular to provide a dyeing composition with adjustable water fastness and watercolor-adjustable properties, i.e. which combines the advantages of the two aforementioned types of inks and avoids the disadvantages. Summary of the Invention

[0012] This object is achieved according to the subject matter of the independent claims. Preferred embodiments are apparent from the dependent claims and the following description.

[0013] This object is achieved in particular by a composition for dyeing substrates comprising:

[0014] - 20 to 80% by weight of water;

[0015] - 0.025 to 12.5% ​​by weight of a colorant; and

[0016] -5 to 45% by weight of a binder;

[0017] in,

[0018] The binder has an acid value of at least 40 mg KOH / g dry matter; and

[0019] The pH of the composition is at most 7.5.

[0020] The object is also achieved by a method for preparing a dyed substrate, comprising:

[0021] - providing a substrate;

[0022] - applying a composition for dyeing the substrate on at least a portion of at least one surface of the substrate, and optionally drying the composition to obtain a first film;

[0023] - Providing a watercolor composition, which comprises:

[0024] - 40 to 99.5% by weight of water; and

[0025] - 0.5 to 10% by weight of a base;

[0026] - applying said watercoloring composition on at least a portion of said first film so as to obtain an at least partially dissolved first film;

[0027] - watercoloring the at least partially dissolved first film to obtain a watercolored film; and

[0028] - Drying the watercolored film to obtain a second film.

[0029] Finally, the object is also achieved by the use of the composition according to the invention for dyeing substrates for producing a completely or partially alkali-soluble film on a substrate.

[0030] Composition for dyeing a substrate

[0031] The composition according to the invention is suitable and preferably intended for dyeing substrates.

[0032] dyeing

[0033] The coloring comprises writing, drawing, painting, printing or a combination of two or more thereof, or preferably consists of writing, drawing, painting, printing or a combination of two or more thereof.

[0034] substrate

[0035] The substrate is preferably an absorbent substrate, such as an absorbent writing substrate, more preferably drawing board or paper, particularly preferably watercolor paper; or a non-absorbent substrate, such as a synthetic substrate or plastic substrate, particularly preferably a synthetic film or plastic film; or a mixed media substrate, i.e., a combination of different absorbent and non-absorbent materials; or canvas. Similarly, any other suitable substrate may be provided, such as wood, stone, eggshell, etc.

[0036] water

[0037] The composition for dyeing 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. Preferably, deionized or demineralized water is used as the water. This avoids the introduction of undesirable impurities, such as hardness-forming agents such as calcium or magnesium.

[0038] It may be provided that the composition comprises water as the main solvent, preferably in an amount of at least 90% by weight, based on the total solvent content of the composition. Particularly preferably, the composition comprises water as the sole solvent.

[0039] Preferably, the composition comprises water in an amount of at least 25% by weight, particularly preferably at least 30% by weight, most preferably at least 35% by weight, based on the total weight of the composition.

[0040] Preferably, the composition comprises water in an amount of at most 75 wt%, more preferably at most 70 wt%, further preferably at most 65 wt%, more preferably at most 60 wt%, most preferably at most 55 wt%, for example at most 52.15 wt%, based on the total weight of the composition.

[0041] Preferably, the composition comprises water in an amount of from 25 to 75 wt%, more preferably from 30 to 60 wt%, most preferably from 35 to 55 wt%, based on the total weight of the composition.

[0042] By means of these preferred water contents in the composition, it is possible, on the one hand, to achieve optimized dyeing and, on the other hand, to achieve optimized usability.

[0043] Additional solvents

[0044] It can be provided that in the composition according to the invention for dyeing substrates, water is the only solvent. Alternatively, it can be provided that the composition according to the invention for dyeing substrates comprises a further solvent in addition to water.

[0045] It can be provided that the composition for dyeing substrates comprises 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, based on the total weight of the composition.

[0046] Preferably, the composition for dyeing a substrate comprises an additional solvent in an amount of at most 40% by weight, more preferably at most 35% by weight, further preferably at most 30% by weight, more preferably at most 20% by weight, most preferably at most 15% by weight, based on the total weight of the composition.

[0047] Preferably, the composition for dyeing a substrate comprises the additional solvent in an amount of 1 to 40 wt%, more preferably 5 to 20 wt%, most preferably 10 to 15 wt%, based on the total weight of the composition.

[0048] Preferably, the additional solvent is a water-soluble organic solvent, further preferably an alcohol, more preferably a polyol, most preferably glycerol or a glycol, such as 1,2-propylene glycol.

[0049] By adding further solvents to the composition according to the invention, an improvement in the dissolution behavior of sparingly water-soluble substances, such as pigments or other colorants, can be achieved.

[0050] Colorants

[0051] The composition for dyeing a substrate according to the invention comprises from 0.025 to 12.5% ​​by weight of colorant, based on the total weight of the composition.

[0052] Preferably, the colorant is a dye, a pigment or a mixture of two or more thereof.

[0053] As dyes it is possible to use in particular water-soluble dyes, preferably water-soluble dyes based on food dyes and / or acid dyes and / or basic dyes.

[0054] The dyes listed below have proven to be particularly suitable:

[0055] Food dyes are selected from: E110, CI15985, Food Yellow 3; E104, CI47005, Food Yellow 13; E102, CI19140, Food Yellow 4; E124, CI16255, Food Red 7; E127, CI45430, Food Red 14; E133, CI42090, Food Blue 2; E131, CI42051, Food Blue 3; and / or

[0056] The acid dye is selected from: Acid Yellow 23, CI1910; Acid Red 18, CI16255; Acid Red 51, CI45430; Acid Orange 4, CI16230; Acid Blue 93; Acid Blue 9, CI42090; Acid Blue 104, CI42735; Acid Violet 49, CI42640.

[0057] The basic dye is preferably selected from the group consisting of xanthene dyes, coumarin dyes and rhodamine dyes, such as Basic Violet 11, Basic Yellow 40, Basic Blue 3, Basic Blue 7, Basic Red 1 and Basic Green 1.

[0058] As pigments, organic pigments can be preferably used, more preferably phthalocyanines, metal complexes, quinacridones, quinophthalones, dioxazines, isoindolines, isoindolinones, benzimidazolone, anthraquinones, arylidenes, perylenes, perylenes, naphthols, diketopyrrolopyrroles or azo pigments; and / or inorganic pigments such as titanium dioxide, iron oxide, ultramarine or carbon black.

[0059] Particularly bright, intense and stable colorings can be achieved by means of the preferred colorants mentioned above. Preferably, the composition comprises the colorant in an amount of at least 0.05% by weight, particularly preferably at least 0.075% by weight, based on the total weight of the composition.

[0060] Preferably, the composition comprises a colorant (or colorant preparation) in an amount of at most 11.25 wt. %, more preferably at most 10 wt. %, further preferably at most 8.75 wt. %, more preferably at most 7.5 wt. %, most preferably at most 6.25 wt. %, for example at most 5 wt. %, based on the total weight of the composition. It may be provided that the pigment is present and used as a component of a pigment preparation.

[0061] Preferably, the composition comprises 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%, based on the total weight of the composition.

[0062] If the colorant is a dye, preferably the composition comprises the colorant in an amount of from 0.025 to 3 wt%, more preferably from 0.05 to 2 wt%, most preferably from about 0.1 to 1 wt%, based on the total weight of the composition.

[0063] If the colourant is a pigment, preferably the composition comprises the colourant in an amount of from 0.25 to 10 wt%, more preferably from 1.25 to 7.5 wt%, most preferably from 2.5 to 5 wt%, based on the total weight of the composition.

[0064] In pastel shades, the pigment content can be reduced to 0.025% by weight.

[0065] By means of the above-mentioned preferred colorant contents, an optimal dyeing effect can be achieved.

[0066] adhesive

[0067] The composition for dyeing a substrate according to the present invention comprises 5 to 45% by weight of a binder, based on the total weight of the composition. The binder has an acid number of at least 40 mg KOH / g dry matter. The term "dry matter" herein refers to the dry matter of the binder, for example, when the binder is used in the form of an aqueous solution or dispersion. The acid number is determined in accordance with the DIN ISO EN 2114 standard in force on the priority date.

[0068] Preferably, the composition for dyeing a substrate comprises a total content of binders of at least 10% by weight, based on the total weight of the composition, particularly preferably at least 15% by weight, further preferably at least 20% by weight, more preferably 25% by weight and most preferably at least 28% by weight.

[0069] Preferably, the composition for dyeing substrates comprises a total content of binders of at most 40% by weight, particularly preferably at most 35% by weight, for example about 30% by weight, based on the total weight of the composition.

[0070] Preferably, the composition for dyeing a substrate comprises a total binder content of 10 to 45% by weight, based on the total weight of the composition, particularly preferably 20 to 40% by weight, further preferably 25 to 35% by weight, most preferably about 28 to 30% by weight, for example about 36% by weight.

[0071] The acid value of the binder may preferably be at least 50 mg KOH / g dry matter, more preferably at least 60 mg KOH / g dry matter, further preferably at least 70 mg KOH / g dry matter, further 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, for example about 120 mg KOH / g dry matter.

[0072] The acid value of the binder may preferably be at most 250 mg KOH / g dry matter, more preferably at most 220 mg KOH / g dry matter, further preferably at most 200 mg KOH / g dry matter, still further preferably at most 180 mg KOH / g dry matter, even more preferably at most 170 mg KOH / g dry matter, most preferably at most 160 mg KOH / g dry matter, for example about 130 mg KOH / g or 160 mg KOH / g dry matter.

[0073] The acid value of the binder may preferably be 50 to 250 mg KOH / g dry matter, more preferably 60 to 220 mg KOH / g dry matter, further preferably 70 to 220 mg KOH / g dry matter, more preferably 80 to 180 mg KOH / g dry matter, even more preferably 100 to 170 mg KOH / g dry matter, further preferably 100 to 160 mg KOH / g dry matter, most preferably 110 to 160 mg KOH / g dry matter, for example about 110 to 130 mg KOH / g dry matter, for example about 130 mg KOH / g or 160 mg KOH / g dry matter.

[0074] The binder may preferably be a polymer binder. The binder may preferably be a polymer resin. It may be provided that the binder has carboxyl groups and / or nitrile groups and / or sulfonyl groups, preferably carboxyl groups. This allows for particularly good dyeability, in particular when using basic dyes. It is preferably provided that the binder is a polymer resin containing carboxyl-containing monomer units. Particularly preferably, the binder comprises or consists of a polyacrylate resin.

[0075] The binder can be used in the composition as a solid and / or aqueous binder preparation, ie can be used in these forms for preparing the composition. In this context, an aqueous binder preparation is particularly a binder solution or a binder dispersion.

[0076] Preferably, a binder dispersion is used to prepare the composition according to the present invention. In this case, the content of the binder in the composition is expressed with reference to the total weight of the binder dispersion (including solvent, etc.).

[0077] It can be provided that the pH value of the binder dispersion is at most 7.5, preferably at most 7, more preferably 1 to 5, further preferably 1.5 to 3, and most preferably 1.9 to 2.5. It can be provided that the binder dispersion is a white or translucent dispersion of binder particles with low viscosity in the acidic or neutral pH range (i.e. pH≦7), wherein these binder particles gradually dissolve at higher pH values ​​until a clear, transparent and highly viscous solution is formed.

[0078] Provision can be made for the binder dispersion to have a solids content of 30 to 60% by weight, preferably 40 to 50% by weight, particularly preferably 43 to 47% by weight, most preferably 44 to 46% by weight, based on the total weight of the binder dispersion.

[0079] It may be provided that the viscosity of the binder dispersion is 10 to 80 mPa·s. The viscosity can be determined according to the ASTM D2196 standard in force on the priority date.

[0080] It may be provided that the density of the binder dispersion is 1 to 1.2 g / cm 3 , preferably 1.05 to 1.1 g / cm 3 , for example 1.08 g / cm 3 . The density can be determined according to the ASTM D1475 standard in force at the priority date.

[0081] It can be provided that the minimum film-forming temperature of the binder dispersion is 40 to 70° C., preferably 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 can be determined according to the ASTM D2354-10 standard in force on the priority date.

[0082] By using corresponding binder dispersions for the preparation of the composition according to the invention, advantageous mixing with the other components of the composition can be achieved.

[0083] The binder may be an alkali-soluble acrylate dispersion. The binder may be an alkali-soluble polyacrylate dispersion. The binder may be an acidic acrylate dispersion. The binder may be an acidic polyacrylate dispersion. The binder may be an ASE thickener. Exemplary commercially available 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). The use of corresponding alkali-soluble polyacrylate dispersions achieves the most significant effect of the present invention, namely, particularly easily adjustable water resistance and good redissolubility achieved by the watercoloring composition according to the present invention.

[0084] Preferably, the binder has a glass transition temperature of at least 50° C., preferably exceeding 50° C. The glass transition temperature can be determined by differential scanning calorimetry (DSC) according to the ASTM-E1356 standard in force at the priority date. Such a glass transition temperature can improve color stability in dyed substrates.

[0085] It may be provided that the binder, in particular the binder dispersion, comprises binder particles. It may be provided that the binder particles have an average particle size of at least 50 nm, preferably at least 100 nm. The particle size can be determined by dynamic light scattering according to the ASTM E3247-20 standard in force on the priority date. A correspondingly larger binder particle size can prevent the ink from penetrating too deeply into the absorbent substrate, thereby improving the watercolor properties, i.e., the subsequent colorability of the ink on the substrate.

[0086] pH

[0087] The pH value of the composition for dyeing a substrate according to the present invention is at most 7.5, preferably less than 7.5, more preferably at most 7.4, further preferably at most 7.3, further preferably at most 7.2, even more preferably at most 7.1, most preferably at most 7.0, at most 6.9, particularly preferably 6.7, for example at most 6.6, most preferably 6.5.

[0088] Preferably, the pH value of the composition for dyeing a substrate is at least 1, particularly preferably at least 3, further preferably at least 4, even further preferably at least 5, more preferably at least 5.5, most preferably at least 6.

[0089] Preferably, the pH value of the composition for dyeing a substrate is 4 to 7.5, particularly preferably 5 to 7.2, further preferably 5.5 to 7, most preferably 6 to 6.5.

[0090] pH adjusters

[0091] It may be provided that the composition further comprises from 0.01 to 3% by weight, based on the total weight of the composition, of a pH regulator, in particular a pH regulator suitable for adjusting the pH of the composition for dyeing a substrate to a pH value of at most 7.5, preferably at most 7. The pH regulator may be a base or a pH buffer. Preferably, the pH regulator is a base. The base may preferably be an amine, particularly preferably a low-odor or neutral-odor amine, such as N-butylaminoethanol (Vantex T, from Eastman), 2-butylaminoethanol (Advantex, from Eastman), triethanolamine (CSC ), 2-amino-2-methylpropanol (AMP, Angus Chemie) or tris(hydroxymethyl)aminomethane (from Merck).

[0092] Preferably, the composition contains the pH adjuster in an amount of at least 0.1 wt %, particularly preferably at least 0.3 wt %, further preferably at least 0.5 wt %, most preferably at least 0.6 wt %, based on the total weight of the composition.

[0093] Preferably, the composition contains the pH adjuster in an amount of at most 2.5 wt%, particularly preferably at most 2 wt%, further preferably at most 1 wt%, most preferably at most 0.75 wt%, based on the total weight of the composition.

[0094] Preferably, the composition contains the pH adjuster in an amount of 0.1 to 3 wt %, particularly preferably 0.3 to 2 wt %, further preferably 0.5 to 1 wt %, and most preferably 0.6 to 0.75 wt %, based on the total weight of the composition.

[0095] The properties of the composition and the film layer prepared therefrom can be specifically adjusted by using a corresponding pH regulator in a corresponding content.

[0096] Preservatives / Biocides

[0097] The composition may also contain 0.01 to 0.5% by weight of a preservative and / or biocide, based on the total weight of the composition. Preferred preservatives include, for example, mixtures of tert-butyl hydroperoxide and ethylene glycol monophenyl ether, particularly preferably mixtures of 12 to 60% by weight of tert-butyl hydroperoxide and 3 to 50% by weight of ethylene glycol monophenyl ether, or mixtures of 1,6-dihydroxy-2,5-dioxane and tetramethylolacetylene diurea. Such preservatives are particularly suitable for aqueous solutions and emulsions. Preferred biocides include, for example, mixtures of 2-bromo-2-nitropropane-1,3-diol and 2-octyl-2H-isothiazol-3-one, or, for particularly effective pollution prevention, mixtures of BIT (1,2-benzisothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), and OIT (2-octyl-2H-isothiazol-3-one). 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.

[0098] Preferably, the composition comprises a total content of preservatives and / or biocides of at least 0.05 wt%, more preferably at least 0.1 wt%, further preferably at least 0.15 wt%, most preferably at least 0.2 wt%, based on the total weight of the composition.

[0099] Preferably, the composition comprises a total content of preservatives and / or biocides 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.-%, based on the total weight of the composition.

[0100] Preferably, the composition comprises a total content of preservatives and / or biocides of 0.05 to 0.4 wt %, particularly preferably 0.1 to 0.3 wt %, further preferably 0.15 to 0.25 wt %, most preferably about 0.2 wt %, based on the total weight of the composition.

[0101] moisturizer

[0102] It may be provided that the composition further comprises 0.01 to 20% by weight of a humectant, based on the total weight of the composition. Preferably, the humectant is an organic polyol and / or polyethylene glycol and / or a sugar and / or a sugar alcohol and / or a corresponding derivative, such as a sugar amine, particularly preferably selected from the group consisting of diethylene glycol, propylene glycol, 1,2-propylene glycol, glycerol, trimethylolpropane, ditrimethylolpropane, neopentyl glycol, erythritol, pentaerythritol, glucose, fructose, mannose, invert sugar, sucrose, sorbitol, xylitol, mannitol, and mixtures thereof, particularly preferably 1,2-propylene glycol. Preferably, the composition comprises the humectant in an amount of at least 1% by weight, particularly preferably at least 5% by weight, further preferably at least 7.5% by weight, and most preferably at least 10% by weight, based on the total weight of the composition.

[0103] Preferably, the composition comprises the moisturizer in an amount of at most 17.5 wt %, particularly preferably at most 15 wt %, further preferably at most 13.5 wt %, based on the total weight of the composition.

[0104] Preferably, the composition contains the moisturizer in an amount of 1 to 17.5 wt %, particularly preferably 5 to 15 wt %, further preferably 7.5 to 14.5 wt %, and most preferably about 10 to 13.5 wt %, based on the total weight of the composition.

[0105] The corresponding humectant in the corresponding concentration can improve the application properties of the composition. In addition, it can prevent the composition from drying out before use.

[0106] In addition, the humectant can also act as a film former and / or a decapping aid. Decapping aids can improve "decapping time." "Decapping time" is understood to be the time a writing instrument or writing system can remain open (i.e., unclosed), rest, be stored, or remain unused without drying out in the process.

[0107] Improved film formation results in a more stable and uniform coating.

[0108] Surfactants / surfactants

[0109] It may be provided that the composition further comprises from 0.01 to 7% by weight, based on the total weight of the composition, of surfactants and / or surface-active substances.

[0110] The surfactant may be an emulsifier, a dispersant, a stabilizer or a substrate wetting agent, preferably a silicone surfactant, a fatty alcohol ether sulfate, a fatty alcohol ether phosphate, a fatty alcohol phosphate ester, a sulfosuccinate or the like.

[0111] The surfactant is preferably a nonionic surfactant, anionic surfactant or amphoteric surfactant.

[0112] Stabilizers in the sense of the present disclosure are in particular surface-active substances which stabilize colloidal particle systems against reagglomeration or agglomeration by adsorption at the particle interfaces by means of steric, electrostatic or electrosteric interactions, thereby preventing sedimentation, syneresis, particle size increase and viscosity increase.

[0113] In the context of the present disclosure, nonionic surfactants can be classified according to the following system. This is the system described by Atlas Chemie, the "HLB system" (Hydrophilic-Lipophilic Balance). In the HLB system, each emulsifier is assigned a numerical value, called the HLB value. The HLB value indicates the hydrophilic-lipophilic balance.

[0114] All emulsifiers contain both hydrophilic and lipophilic groups. Lipophilic emulsifiers have low HLB values, below 9.0, while hydrophilic emulsifiers have high HLB values, above 11.0. Emulsifiers with low HLB values ​​tend to be oil-soluble, while those with high HLB values ​​are water-soluble. For example, water-soluble emulsifiers are used when the end product can be diluted with water. O / W emulsifiers have HLB values ​​between 8 and 18. Hydrophilic emulsifiers with high HLB values ​​promote the formation of O / W emulsions.

[0115] In the compositions according to the invention, commercially available emulsifiers can preferably be used as nonionic dissolution aids. These emulsifiers are, for example, available as viscous solutions prepared by reacting ethylene oxide with hydrogenated castor oil and may consist, 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 may also include fatty acid glycerol polyglycol esters and fatty acid polyglycol esters. These represent the hydrophobic portion of the product. The hydrophilic portion may consist of polyethylene glycol and glycerol ethoxylate.

[0116] Possible emulsifiers that come into consideration are preferably nonionic emulsifiers selected from the group consisting of alcohol fatty acid esters, ethylene fatty acid esters, polyethylene glycol fatty acid esters, glycerol or poly fatty acid esters, sorbitol fatty acid esters, pentaerythritol fatty acid esters, glyceride fatty acid esters, sucrose fatty acid esters, alcohol polyglycol ethers, fatty acid polyglycol ethers, fatty acid ester polyglycol ethers, fatty amine polyglycol ethers, fatty acid alkanolamide polyglycol ethers, oil and fat polyglycol ethers, polypropylene glycol polyglycol ethers, lanolin polyglycol ethers, alcohol polypropylene glycol ethers, fatty acid polypropylene glycol ethers, fatty amine polypropylene glycol ethers, lanolin polypropylene glycol ethers.

[0117] Preferably, the composition comprises a total content of surfactants and / or surface-active substances of at least 0.1 wt.-%, based on the total weight of the composition, particularly preferably at least 1 wt.-%, further preferably at least 1.5 wt.-%, most preferably at least 2 wt.-%.

[0118] Preferably, the composition comprises a total content of surfactants and / or surface-active substances of at most 5% by weight, based on the total weight of the composition, particularly preferably at most 4% by weight, further preferably at most 3% by weight, most preferably at most 2.5% by weight.

[0119] Preferably, the composition comprises a total content of surfactants and / or surface-active substances of 0.1 to 5% by weight, preferably 1 to 4% by weight, further particularly preferably 1.5 to 3% by weight, most preferably 2 to 2.5% by weight, for example 2.1% by weight, based on the total weight of the composition.

[0120] By means of corresponding amounts of corresponding surfactants and / or surface-active substances, the ink stability and the wetting of the substrate to be dyed can be improved.

[0121] Oligomers / polymers with surface active groups / pigment-affinity groups

[0122] It can be provided that the composition further comprises a compound having surface-active groups and / or pigment-affinity groups, preferably an oligomer having surface-active groups and / or pigment-affinity groups and / or a polymer having surface-active groups and / or pigment-affinity groups, in an amount of 0.01 to 5% by weight, based on the total weight of the composition.

[0123] In the sense of the present invention, pigment-affine groups are anchoring groups which are selected according to the type of pigment, for example whether it is organic or inorganic.

[0124] Surface-active groups within the meaning of the present invention are groups which have an affinity for surfaces and interfaces, for example for glass, metal, plastic, air, binder particles (inorganic or organic) or pigments (inorganic or organic).

[0125] In particular, for use with inorganic or mineral pigments (TiO2, iron oxide, etc.), compounds having anionic or cationic surface-active groups and / or pigment-affinity groups can be provided, in particular compounds having amino groups, phosphate groups, quaternary ammonium groups, sulfonate groups, sulfonamide groups, carboxylate groups, etc.

[0126] Unmodified organic pigments are generally nonpolar and lack a surface charge. Nonionic dispersants with hydrophilic and hydrophobic segments are typically used, with the nonpolar segments adhering to the pigment surface via van der Waals interactions (see HLB value). The corresponding nonpolar segments are considered pigment-affinity groups. Examples of hydrophobic, surface-active and / or pigment-affinity groups include nonylphenol, isotridecyl, isotriphenylethylene, C13 or other branched or linear fatty acid or alcohol groups, siloxane groups, and phenolic resin groups.

[0127] These compounds having surface active and / or pigment-affinity groups are added to pigmented writing fluids to stabilize them against agglomeration, sedimentation, syneresis, viscosity drift, tinting strength fluctuations, hue changes, and other aging effects, or to improve the compatibility between the binder and the colorant.

[0128] Preferably, the composition contains compounds having surface-active groups and / or pigment-affinity groups in an amount of at least 0.1% by weight, particularly preferably at least 0.5% by weight, further preferably at least 0.75% by weight, and most preferably at least 1% by weight, based on the total weight of the composition.

[0129] Preferably, the composition contains compounds having surface-active groups and / or pigment-affinic groups in an amount of at most 5% by weight, based on the total weight of the composition, particularly preferably at most 2.5% by weight, further preferably at most 1.5% by weight, most preferably at most 1% by weight.

[0130] Preferably, the total content of compounds having surface-active groups and / or pigment-affinity groups contained in the composition is 0.1 to 5 wt. %, particularly preferably 0.5 to 2.5 wt. %, further preferably 0.75 to 1.5 wt. %, and most preferably about 1 wt. %, based on the total weight of the composition.

[0131] Other components

[0132] In addition, co-binders (such as acid-free acrylate polymers, etc.) and co-film formers (such as Texanol, butyl diglycol, etc.) can also be added to further optimize the film properties and other application performance of the ink.

[0133] Likewise, waxes and other customary additives may be added, in particular to improve scratch resistance. DETAILED DESCRIPTION

[0134] In one embodiment, the present invention relates to a composition for dyeing a substrate, comprising:

[0135] - 20 to 80% by weight of water;

[0136] - 0.1 to 0.5% by weight of biocide;

[0137] - 0.1 to 20% by weight of humectants;

[0138] - 0.1 to 3% by weight of a pH regulator;

[0139] - 0.1 to 7% by weight of surfactants and / or surface-active substances;

[0140] - 0.1 to 50% by weight of a colorant; and

[0141] -5 to 45% by weight of a binder;

[0142] in:

[0143] The binder has an acid value of at least 40 mg KOH / g dry matter; and

[0144] The pH of the composition is at most 7.5.

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

[0146] - 25 to 75% by weight of water;

[0147] - 0.1 to 0.5% by weight of biocide;

[0148] - 2 to 18% by weight of humectants;

[0149] - 0.1 to 4% by weight of a pH regulator;

[0150] - 0.1 to 7% by weight of surfactants and / or surface-active substances;

[0151] - 0.1 to 45% by weight of colorants;

[0152] - 10 to 40% by weight of a binder;

[0153] in:

[0154] The binder has an acid value of at least 50 mg KOH / g dry matter; and

[0155] The pH of the composition is at most 7.5.

[0156] Preparation of compositions for dyeing substrates

[0157] The composition for dyeing substrates can be prepared by mixing methods known in the art, for example by adding the individual components of the composition for dyeing substrates to a mixing kettle. In this case, the individual components are continuously mixed with one another thoroughly by means of suitable stirring means in order to distribute them sufficiently evenly.

[0158] Method for preparing a dyed substrate

[0159] The invention also relates to a method for producing a dyed substrate.

[0160] Provide substrate

[0161] In a first step, a substrate is provided for this purpose. This substrate is preferably an absorbent substrate, such as an absorbent writing substrate, more preferably drawing board or paper, particularly preferably watercolor paper; or a non-absorbent substrate, such as a synthetic substrate or plastic substrate, particularly preferably a synthetic film or plastic film; or a mixed-media substrate, i.e., a combination of different absorbent and non-absorbent materials; or a canvas. Likewise, any other suitable substrate may be provided, such as wood, stone, eggshell, etc.

[0162] The compositions according to the invention are particularly useful even on non-absorbent substrates, i.e., they exhibit very good watercolor properties even on such substrates. In contrast to compositions of the prior art, 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 grease-resistant even on non-absorbent substrates.

[0163] Application and optional drying of the composition for dyeing a substrate

[0164] In a subsequent second step, a composition according to the invention for dyeing substrates is applied to said substrate.

[0165] Described composition is applied on at least one surface of base material.In this case, described composition is applied on at least a portion of corresponding surface.Described applying can comprise writing, painting, painting, printing, spraying or two or more combination wherein.Described applying can be carried out by paintbrush, pen (particularly watercolor pen), print head, fountain pen or other routine application instrument or two or more combination wherein.

[0166] The application may also include the further step of applying a further ink application on and / or next to the first application, wherein it may be provided in particular that the further ink application contains a colorant different from that in the first film. The further ink application may be obtained from a second composition for dyeing a substrate according to the invention, wherein the second composition for dyeing a substrate contains a colorant different from that in the first film. The first ink application and the optional further ink application are converted into the first film as follows.

[0167] After application is complete, the applied composition can optionally be dried on the substrate (or partially dried in the substrate if part of the composition has penetrated into the absorbent substrate). The drying can be carried out at room temperature (23° C.) and standard atmospheric pressure. Drying can be assisted by supplying heat, passing a gas flow (such as air) through the composition to be dried, applying a vacuum, etc.

[0168] After drying is complete, a first film is obtained on the substrate (or alternatively, if part of the composition has penetrated into the absorbent substrate, partly in the absorbent substrate). This first film is largely water-resistant, preferably water-resistant, and can be painted over with other dyes without being "smeared", that is, it can be covered without mixing with other dyes (that is, other compositions used to dye the substrate).

[0169] Alternatively, even without a drying step, a first film can be obtained from the applied composition for dyeing a substrate according to the present invention, which can then be watercolorized as described below. The method further includes the step of providing a watercoloring composition comprising 40 to 99.5% by weight of water and 0.5 to 10% by weight of an alkali, based on the total weight of the watercoloring composition.

[0170] The watercoloring composition can be provided by the manufacturer of the composition for dyeing a substrate according to the present invention and sold together with the composition for dyeing a substrate, for example, in a set, wherein the composition for dyeing a substrate and the watercoloring composition are sold separately, for example, in separate vials or filled into separate applicators. In this case, an amine base is preferably used in the watercoloring composition. Alternatively, the manufacturer of the composition for dyeing a substrate according to the present invention can also sell only the composition and provide instructions for the end user to prepare the watercoloring composition using ready-made materials. In this case, sodium bicarbonate or sodium carbonate, for example, are preferred bases.

[0171] water

[0172] Preferably, deionized or demineralized water is used as water. This makes it possible to avoid undesirable impurities, such as those that could affect the stability and durability of the watercoloring composition (hardness formers).

[0173] It may be provided that the watercoloring composition comprises water as the main solvent, preferably in an amount of at least 90% by volume based on the total solvent content of the watercoloring composition. Particularly preferably, the watercoloring composition comprises water as the only solvent.

[0174] Preferably, the water content of the watercolor composition is at least 50 wt %, particularly preferably at least 70 wt %, further preferably at least 80 wt %, more preferably at least 90 wt %, most preferably at least 95 wt %, based on the total weight of the watercolor composition.

[0175] Preferably, the watercoloring composition comprises water in an amount of at most 99 wt % based on the total weight of the watercoloring composition.

[0176] Preferably, the watercoloring composition 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 %, based on the total weight of the watercoloring composition. This preferred amount of water in the watercoloring composition allows for optimal redissolution of the first film.

[0177] alkali

[0178] The base may preferably be an amine, a low odor amine or an odor-neutral amine, such as N-butylaminoethanol (Vantex T, from Eastman), 2-butylaminoethanol (Advantex, from Eastman), triethanolamine (CSC ), 2-amino-2-methylpropanol (AMP, Angus Chemie), or tris(hydroxymethyl)aminomethane (from Merck). Likewise, sodium bicarbonate (baking powder, caustic soda), sodium carbonate (soda), or ammonium bicarbonate (Hirschhornsalz) can also be used as the base.

[0179] Preferably, the watercoloring composition contains an alkali in an amount of at least 0.1 wt %, particularly preferably at least 1 wt %, further preferably at least 2 wt %, most preferably at least 3 wt %, based on the total weight of the watercoloring composition.

[0180] Preferably, the watercoloring composition contains an alkali in an amount of at most 6 wt %, particularly preferably at most 5 wt %, further preferably at most 4 wt %, most preferably at most 3 wt %, based on the total weight of the watercoloring composition.

[0181] Preferably, the watercoloring composition contains alkali in an amount of 0.1 to 6 wt %, particularly preferably 1 to 5 wt %, further preferably 2 to 4 wt %, most preferably about 3 wt %, based on the total weight of the watercoloring composition.

[0182] Preservatives / Biocides

[0183] It may be provided that the watercoloring composition further comprises 0.01 to 0.5% by weight of a preservative and / or biocide, based on the total weight of the watercoloring composition.

[0184] Preferred preservatives include, for example, mixtures of tert-butyl hydroperoxide and ethylene glycol monophenyl ether, particularly preferably mixtures of 12 to 60% by weight of tert-butyl hydroperoxide and 3 to 50% by weight of ethylene glycol monophenyl ether; or mixtures of 1,6-dihydroxy-2,5-dioxane and tetramethylolacetylene diurea. Such preservatives are particularly suitable for aqueous solutions and emulsions. Preferred biocides include, 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 provide special protection against 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.

[0185] Preferably, the total content of preservatives and / or biocides contained in the watercoloring composition is at least 0.05% by weight, particularly preferably at least 0.1% by weight, further preferably at least 0.15% by weight, most preferably at least 0.2% by weight, based on the total weight of the watercoloring composition.

[0186] Preferably, the total content of preservatives and / or biocides contained in the watercoloring composition is 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. %, based on the total weight of the watercoloring composition.

[0187] Preferably, the total content of preservatives and / or biocides contained in the watercoloring composition is 0.05 to 0.4 weight %, particularly preferably 0.1 to 0.3 weight %, further preferably 0.15 to 0.25 weight %, most preferably about 0.2 weight %, based on the total weight of the watercoloring composition.

[0188] adhesive

[0189] It may be provided that the watercoloring composition further comprises 0.1 to 50% by weight of a binder.

[0190] Preferably, the binding agent is an alkali-stable binding agent.Can stipulate that the binding agent is gum arabic, wax (for example beeswax) or synthetic polymer binding agent, preferably polyacrylate, polyurethane, polyester, sulfopolyester, maleate resin or two or more copolymers therein, polyvinyl alcohol, polyvinyl pyrrolidone etc.For example, the binding agent can be Acronal 12DE (acrylonitrile-acrylate copolymer dispersion, BASF), Neocryl XK166N (acrylic acid-styrene copolymer dispersion, Covestro), NeoRez R-3972 (polyurethane dispersion, Covestro), Eastek1000 (sulfopolyester colloid solution, Eastman) or Mowiol 4-88 (polyvinyl alcohol solid resin, Kuraray).

[0191] Preferably, the total content of the binder contained in the watercolor composition is at least 1 wt %, particularly preferably at least 5 wt %, further preferably at least 10 wt %, most preferably at least 20 wt %, based on the total weight of the watercolor composition.

[0192] Preferably, the total content of the binder contained in the watercoloring composition is at most 45 wt %, more preferably at most 40 wt %, particularly preferably at most 30 wt %, for example about 28 wt %, based on the total weight of the watercoloring composition.

[0193] Preferably, the total content of the binder contained in the watercolor composition is 1 to 45 weight %, particularly preferably 5 to 40 weight %, further preferably 10 to 35 weight %, most preferably about 20 to 30 weight %, for example about 28 weight %, based on the total weight of the watercolor composition.

[0194] Surfactants / surfactants

[0195] It can be provided that the watercoloring composition further comprises 0.01 to 7% by weight of a surfactant and / or surface-active substance, based on the total weight of the watercoloring composition.

[0196] The surfactant may be an emulsifier, dispersant, stabilizer or substrate wetting agent, preferably an organosilicon surfactant, fatty alcohol ether sulfate, fatty alcohol ether phosphate, fatty alcohol phosphate ester, sulfosuccinate, sugar surfactant or the like.

[0197] The surfactant is preferably a nonionic surfactant, anionic surfactant or amphoteric surfactant.

[0198] Stabilizers in the sense of the present disclosure are in particular surface-active substances which stabilize colloidal particle systems against reagglomeration or agglomeration by adsorption at the particle interfaces by means of steric, electrostatic or electrosteric interactions, thereby preventing sedimentation, syneresis, particle size increase and viscosity increase.

[0199] In the context of the present disclosure, nonionic surfactants can be classified according to the following system. This is the system described by Atlas Chemie, the "HLB system" (Hydrophilic-Lipophilic Balance). In the HLB system, each emulsifier is assigned a numerical value, called the HLB value. The HLB value indicates the hydrophilic-lipophilic balance.

[0200] All emulsifiers contain both hydrophilic and lipophilic groups. Lipophilic emulsifiers have low HLB values, below 9.0, while hydrophilic emulsifiers have high HLB values, above 11.0. Emulsifiers with low HLB values ​​tend to be oil-soluble, while emulsifiers with high HLB values ​​are water-soluble. For example, water-soluble emulsifiers are used when the end product can be diluted with water. O / W emulsifiers have HLB values ​​between 8 and 18. Hydrophilic emulsifiers with high HLB values ​​promote the formation of O / W emulsions.

[0201] In the watercoloring composition according to the present invention, commercially available emulsifiers can preferably be used as nonionic dissolution aids. These emulsifiers are, for example, available as viscous solutions prepared by reacting ethylene oxide with hydrogenated castor oil and may 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 may also include fatty acid glycerol polyethylene glycol esters and fatty acid polyethylene glycol esters. These represent the hydrophobic portion of the product. The hydrophilic portion may be composed of polyethylene glycol and glycerol ethoxylate.

[0202] Possible emulsifiers that come into consideration are preferably nonionic emulsifiers selected from the group consisting of alcohol fatty acid esters, ethylene fatty acid esters, polyethylene glycol fatty acid esters, glycerol or poly fatty acid esters, sorbitol fatty acid esters, pentaerythritol fatty acid esters, glyceride fatty acid esters, sucrose fatty acid esters, alcohol polyglycol ethers, fatty acid polyglycol ethers, fatty acid ester polyglycol ethers, fatty amine polyglycol ethers, fatty acid alkanolamide polyglycol ethers, oil and fat polyglycol ethers, polypropylene glycol polyglycol ethers, lanolin polyglycol ethers, alcohol polypropylene glycol ethers, fatty acid polypropylene glycol ethers, fatty amine polypropylene glycol ethers, lanolin polypropylene glycol ethers.

[0203] Preferably, the total content of surfactants and / or surface-active substances contained in the watercoloring composition is at least 0.1 wt %, particularly preferably at least 1 wt %, further preferably at least 1.5 wt %, and most preferably at least 2 wt %, based on the total weight of the watercoloring composition.

[0204] Preferably, the total content of surfactants and / or surface-active substances contained in the watercoloring composition is at most 5 weight %, particularly preferably at most 4 weight %, further preferably at most 3 weight %, and most preferably at most 2.5 weight %, based on the total weight of the watercoloring composition.

[0205] Preferably, the total content of surfactants and / or surface-active substances contained in the watercoloring composition is 0.1 to 5 weight %, preferably 1 to 4 weight %, further particularly preferably 1.5 to 3 weight %, most preferably 2 to 2.5 weight %, for example 2.1 weight %, based on the total weight of the watercoloring composition.

[0206] By means of corresponding amounts of corresponding surfactants and / or surface-active substances, the ink stability and the wetting of the substrate to be watercolored can be improved.

[0207] Apply and watercolor

[0208] The provided watercolor composition is applied on at least a portion of the first film. The application can be carried out by a brush, a pen (especially a watercolor pen), a printing head, a pen or other conventional application tools, or a combination of two or more thereof.

[0209] By applying the watercoloring composition to the first film, the first film is at least partially "partially dissolved," that is, at least a portion of the solids of the composition for dyeing a substrate contained in the first film upon drying, in particular the colorant and the corresponding portion of the binder having an acid value of at least 40 mg KOH / g, are dissolved in the watercoloring composition. Because the binder contained in the composition for dyeing a substrate has an acid value of at least 40 mg KOH / g, the solid components of the composition co-deposited with the binder have higher solubility or redispersibility under alkaline conditions (pH>7) than under neutral or acidic conditions (pH≤7). Therefore, the base contained in the watercoloring composition promotes the "partial dissolution" process. The carboxyl groups present in the acidic polymer are completely neutralized by the base of the watercoloring composition, thereby achieving or significantly improving the water solubility of the polymer.

[0210] Watercolorization here refers to the mixing of different ink layers (of the same or different dyes) applied adjacently or overlappingly with one another in order to achieve a smooth transition between the ink layers.

[0211] The step (1) of applying the watercoloring composition to at least a portion of the first film to obtain an at least partially dissolved first film and the step (2) of watercoloring the at least partially dissolved first film to obtain a watercolored film can be performed at least partially overlapping, i.e., at least partially simultaneously. This means, in particular, that the partially dissolved film can be watercolored even during the application of the watercoloring composition.

[0212] dry

[0213] After the watercoloring is completed, the watercolored film is dried on the substrate (or partially dried in the substrate if the composition has partially penetrated the substrate). The drying can be carried out at room temperature (23° C.) and standard atmospheric pressure. Drying can be assisted by supplying heat, passing a stream of air (air) through the composition to be dried, applying a vacuum, etc.

[0214] If an amine compound, in particular a volatile amine compound, is used as the base in the watercoloring composition, the drying step results in reprotonation of the binder having an acid value of at least 40 mg KOH / g dry matter, because during the drying step, the amine compound is released again from the ammonium compound obtained by reaction of the amine compound with the protons of the binder having an acid value of at least 40 mg KOH / g dry matter during application of the watercoloring composition to at least a portion of the first film and volatilizes or evaporates.

[0215] If other bases are used in the watercoloring composition, for example less volatile or non-volatile bases such as alkali metal hydroxides, an additional curing step can be provided after drying. This step can, for example, consist of applying an acidic aqueous solution to the watercolored film (for example by means of a "fixing spray").

[0216] Alternatively, coating can also be carried out with the aid of corresponding aqueous solutions of polyvalent metal salts (salts of zinc, aluminum, iron, magnesium, calcium, etc.), which form sparingly soluble compounds with the acidic binder of the watercoloring composition.

[0217] The second film thus obtained can have a particularly smooth color transition and can likewise be water-resistant.

[0218] Use of a composition for dyeing a substrate

[0219] The invention also relates to the use of the composition according to the invention for dyeing substrates for producing a completely or partially alkali-soluble film on a substrate.

[0220] The use according to the present invention may particularly include providing a substrate, preferably an absorbent substrate, such as an absorbent writing substrate, more preferably drawing board or paper, particularly preferably watercolor paper; or a non-absorbent substrate, such as a synthetic substrate or plastic substrate, particularly preferably a synthetic film or plastic film; or a mixed-media substrate, i.e., a combination of different absorbent and non-absorbent materials; or a canvas. Likewise, any other suitable substrate may be provided, such as wood, stone, eggshell, etc.

[0221] Provision may be made for the composition according to the invention for dyeing a substrate to then be applied to the substrate.

[0222] In this case, the composition is applied to at least a portion of the respective surface. The application may comprise writing, drawing, painting, printing, spraying, or a combination of two or more thereof. The application may be by a paintbrush, pen (particularly a watercolor pen), a print head, a fountain pen or other conventional application tool (such as a spray gun), or a combination of two or more thereof.

[0223] The application can also include the further step of applying a further ink application on and / or next to the first application, wherein it can be provided in particular that the further ink application contains a colorant different from the colorant in the first film. This further ink application can also be obtained using the composition according to the invention for dyeing a substrate, wherein the further ink application contains a colorant different from the colorant in the first film. The first ink application and the optional further ink application are converted into the first film as follows.

[0224] After application, the applied composition can be dried on the substrate (or partially dried in the substrate if some of the composition has penetrated the substrate). The drying can be carried out at room temperature (23° C.) and standard atmospheric pressure. Drying can be assisted by supplying heat, passing a stream of air (air) through the composition to be dried, applying a vacuum, etc.

[0225] Effects of the present invention

[0226] The composition for dyeing a substrate according to the present invention surprisingly has adjustable water resistance and watercolor properties, ie it combines the advantages of water-resistant inks containing binders and the advantages of easily watercolorable inks while avoiding the disadvantages of these two types of inks.

[0227] The composition according to the invention and its use, particularly in the method according to the invention, make it possible to combine two different types of inks without compromising the advantages of either type. It is possible to produce just one product line, with the end user ultimately deciding which painting technique or application they wish to use the product for. Furthermore, even after the artwork is complete, the user can decide whether they wish to further process it using watercolor techniques.

[0228] Another advantage is that the watercolors produced in this way remain water-resistant.

[0229] Another advantage is that multiple ink layers can be layered on top of each other without blurring the ink of the underlying ink layer. For example, a contour line can be pre-drawn with a dark dye and then colored with a lighter dye without blurring the contour line (e.g., a combination of yellow and black). This is not possible using compositions according to the prior art. Also advantageously, when over-brushing a dried ink layer, the tip of the writing instrument is no longer stained, thus eliminating the need for tedious cleaning.

[0230] General Definition

[0231] Unless expressly stated otherwise, features stated in the singular (a) also include the plural form. For example, if it is stated that a composition according to the invention comprises a dye, this also includes the case where the composition comprises a mixture of a plurality of dyes.

[0232] Unless expressly stated otherwise, terms such as “comprising”, “including” and the like also include the meaning of “essentially comprising”, “essentially consisting of” or “consisting of…”

[0233] The sum of the individual contents stated for the composition according to the invention for dyeing substrates is 100% by weight and therefore constitutes the total content of the composition.

[0234] Unless expressly stated otherwise, the term "composition" as used herein refers to "a composition for dyeing a substrate according to the present invention".

[0235] Working Example

[0236] Formula Example 1 (black ink):

[0237] 35.0 g water

[0238] 0.2 g of a mixture of 2.5 wt% BIT / 4 wt% MIT / 1 wt% OIT (biocide)

[0239] 10.0 g 1,2-propylene glycol

[0240] 4.0 g sorbitol

[0241] 0.60 g triethanolamine

[0242] 1.0 g of DMEA-neutralized C12-C15 alcohol ethoxylate phosphate (a compound having surface-active groups and / or pigment-affinity groups)

[0243] 0.60 g BYK-348 from BYK-Chemie (silicone surfactant)

[0244] 20.0 g carbon black pigment

[0245] 28.6 g Neocryl XK-39 from Covestro (alkali-soluble polyacrylate dispersion, acid number (SZ) = 130 mg KOH / g dry matter)

[0246] The pH value of the whole composition = 6.6

[0247] Formulation Example 2 (magenta ink):

[0248] 52.15g water

[0249] 0.2 g of a mixture of 2.5 wt% BIT / 4 wt% MIT / 1 wt% OIT (biocide)

[0250] 12.0 g 1,2-propylene glycol

[0251] 3.0 g xylitol

[0252] 0.75 g triethanolamine

[0253] 1.0 g Disponil FES 77 from Cognis (C12-C14 fatty alcohol ether sulfate sodium (30

[0254] EO) (compounds having surface active groups and / or pigment affinity groups)

[0255] 0.60 g Tego Wet KL 245 from Evonic (silicone surfactant)

[0256] 0.30 g of "Basic Violet 11:1" dye

[0257] 30.0 g Joncryl 661 from BASF (alkali-soluble polyacrylate dispersion, acid value (SZ)

[0258] =154 mg KOH / g dry matter)

[0259] The pH value of the whole composition = 6.5

[0260] Watercolor composition:

[0261] 60.0% water

[0262] 0.1% Mixture of 2.5 wt% BIT / 4 wt% MIT / 1 wt% OIT (biocide)

[0263] 7.5% glycerol

[0264] 28% Acronal 12DE (binder)

[0265] 3.0% Advantex (base)

[0266] 1.4% Disponil OC 25 (Oleoyl cetyl ethoxylate (C16 / C18) (25EO))

[0267] (Surfactant)

[0268] Experimental examples and steps

[0269] Substrate: Hahnemühle paper, watercolor paper, 450g / m 2 , item number: 10628410

[0270] Application tool: Pentel "Aqua Brush Water Tank Brush Broad"

[0271] Basis weight (Auflagegewicht): 70 g

[0272] Colorimeter: PANTONE CAPSURE

[0273] Procedure: First, six 1 mm wide lines were drawn on the substrate using the watercolor ink according to Recipe Example 1, with the same 3 mm spacing between the lines (basic markings). These markings were dried for 1 hour under standard climatic conditions (23° C., 50% relative humidity according to DIN EN ISO 139).

[0274] Subsequently, the base painting is covered with two consecutive and rapid coats of water or the above-mentioned watercolor composition, respectively, using the above-mentioned applicator.

[0275] Experimental Example 1:

[0276] Water-filled applicator

[0277] Experimental Example 2:

[0278] An application utensil filled with a watercoloring composition according to the invention.

[0279] Evaluate:

[0280] The color intensity of the unpainted gaps between the dyed lines was measured and the color intensity of the unpainted gaps was assumed to be 0%. In comparison, the color intensity of the dyed lines was assumed to be 100%.

[0281] Table 1 shows the experimental results

[0282]

[0283] As shown in Table 1, the color intensity of the gap after the tap water treatment did not change and was 0%.

[0284] The color intensity of the gap after treatment with the watercolor composition was about 40%.

[0285] The features of the invention disclosed in the preceding description and in the claims may be essential alone or in any combination for the realization of the invention in its different embodiments.

Claims

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

5.

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

3. The composition for dyeing a substrate according to claim 1 or 2, wherein The substrate is an absorbent writing substrate, preferably a drawing board or paper, or a non-absorbent substrate, preferably a synthetic film or plastic film, or a mixed media substrate, or a canvas.

4. A composition for dyeing 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 dyeing a substrate according to any one of the preceding claims, wherein The binder has an acid number of at least 80 mg KOH / g dry matter.

6. A composition for dyeing a substrate according to any one of the preceding claims, wherein The binder comprises binder particles, and the average particle size of the binder particles is preferably at least 50 nm, more preferably at least 100 nm.

7. A composition for dyeing a substrate according to any one of the preceding claims, wherein The binder comprises a polyacrylate resin, and preferably comprises polyacrylate resin particles.

8. A composition for dyeing a substrate according to any one of the preceding claims, wherein The pH of the composition is in the range of 5.5 to 7.

0.

9. A composition for dyeing a substrate according to any one of the preceding claims, wherein The composition further comprises 0.01 to 3 wt % of a pH adjuster, based on the total weight of the composition.

10. The composition for dyeing a substrate according to claim 9, wherein The pH adjuster is a base.

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

12. A composition for dyeing a substrate according to any one of the preceding claims, wherein The composition further comprises 0.01 to 20 weight percent of a humectant, based on the total weight of the composition.

13. A composition for dyeing a substrate according to any one of the preceding claims, wherein The composition further comprises 0.01 to 7 weight percent of a surfactant, based on the total weight of the composition.

14. A method for preparing a dyed substrate, comprising: - providing a substrate; - applying a composition for dyeing a substrate according to any one of claims 1 to 13 on at least a portion of at least one surface of the substrate, and optionally drying the composition to obtain a first film; - Providing a watercolor composition, which comprises, 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; - applying said watercoloring composition on at least a portion of said first film so as to obtain an at least partially dissolved first film; - watercoloring the at least partially dissolved first film to obtain a watercolored film; and - Drying the watercolored film to obtain a second film.

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

Images