Coloring agents, insoluble products, methods for producing same, and methods for using polysaccharides

Abstract

The present invention relates to a colorant having at least one water-swellable, hydrophilic but water-insoluble polysaccharide and at least one pigment comprising at least one dye. The present invention also relates to a method for producing such a colorant.

Description

[Technical Field]

[0001] The present invention relates to colorants, insoluble products, methods for their preparation, and methods for using polysaccharides. [Background technology]

[0002] Colorants can be divided into two groups: soluble dyes and insoluble dyes. Insoluble dyes are also called pigment dyes or pigments. The physical and chemical properties of these two groups differ in their interaction with light. The color impression of soluble dyes is created by absorbing light of the corresponding wavelength. Pigment dyes are based on the reflection and scattering of light on pigment particles.

[0003] The conversion of a soluble dye to an insoluble dye is called laking. This process often involves the addition of Ca ++ and Mg ++ With the addition of polyvalent cations such as , soluble dyes bind to the aluminum hydroxide gel through ionic interactions. Well-known examples of such aluminum lakes are used in the food and cosmetic sectors, the most common of which are pure carmine (E120, CI Natural Red 4) or synthetic food coloring lakes such as tartrazine (E102, CI Food Yellow 4), quinoline yellow (E104, CI Food Yellow 13), yellow orange S (E110, CI Food Yellow 3), allura red (E129, CI Food Color 17), ponceau 4R (E124, Cocinelle Red A, CI Food Color 7), carmoisine (E122, Azorubine, CI Food Color 3), brilliant blue FCF (E133, CI Food Blue 2), and patent blue (E131, CI Food Blue 5).

[0004] Aluminum lakes of natural dyes, such as curcumin, carmine, copper complexes of chlorophyll and chlorophyllin, and anthocyanins, are permitted as food additives in the EU (EU Regulation 1333 / 208), but as a result of amendments (EU Regulation 380 / 2012), most of them are now prohibited because their aluminum content exceeds legal limits in common use. In the United States, only aluminum lakes of approved synthetic food dyes are permitted; aluminum lakes of natural food dyes are not permitted.

[0005] In contrast to lakes made from synthetic dyes, laking natural dyes often results in color changes. For example, red anthocyanins become more or less blue anthocyanin lakes, and orange carmine acid becomes reddish-purple carmine lakes. The associated change in absorption in the long wavelength range of the visible light spectrum has been explained in the literature as a result of complexation of the pigment with aluminum cations. This color change occurs naturally in red- and blue-flowered hydrangeas and is due to the complexation of aluminum with the flower's anthocyanins. Summary of the Invention [Problem to be solved by the invention]

[0006] Since, on the one hand, the production of such aluminum lakes is associated with color changes, and, on the other hand, the field of application of such aluminum lakes is severely limited due to the high aluminum content, and also because consumers, for example in the cosmetics sector, are demanding more natural color dyes, the object of the present invention is to find new colorants or new methods for converting soluble colorants into insoluble colorants, which do not exhibit the aforementioned problems. [Means for solving the problem]

[0007] The purpose of this is to at least one water-swellable, hydrophilic but water-insoluble polysaccharide, and - at least one dye This is achieved by a colorant having at least one pigment comprising: [Effects of the Invention]

[0008] The colorants according to the invention can preferably be used as wall paints, art paints or other paints or lacquers known to those skilled in the art, and also for coloring food products, luxury foods, dietary supplements, cosmetics or pharmaceuticals. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 shows a schematic diagram of a colorant according to the present invention. [Figure 2a] 1 shows a flow chart of a method according to the present invention. [Figure 2b] 1 shows a flowchart of an optional refinement. [Figure 2c] 1 shows a flowchart of an optional refinement. [Figure 3] 1 shows colorants according to the present invention prepared in Examples 1 to 13 and 15. The label contains "ym" information, which corresponds to the particle size [μm] of the colorants according to the present invention. [Figure 4] 1 is a schematic diagram of a product according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The term "colorant" refers to a composition according to the present invention that has a visually perceptible color. The term "pigment" refers to an insoluble colorant. This pigment comprises a dye that is soluble in a solvent and at least one water-swellable, hydrophilic, but water-insoluble polysaccharide, in particular at least one β-1,4-mannan.

[0011] FIG. 1 shows a schematic diagram of a colorant 1 according to the present invention. The colorant 1 comprises a pigment 10, which comprises at least one water-swellable, hydrophilic, but water-insoluble polysaccharide 2 and at least one dye 3. For simplicity, only one dye section is shown in FIG. 1, denoted by the reference numeral 3. The polysaccharide 2 is, in particular, a polysaccharide comprising at least one β-1,4-mannan. Preferably, the polysaccharide 2 is a component consisting essentially of β-1,4-mannan. The polysaccharide 2 may be obtained, in particular, from the endosperm of the tagua nut fruit.

[0012] In connection with the present invention, it has surprisingly been found that matrix encapsulation of such dyes in polysaccharides, particularly β-1,4-mannan, converts the soluble dyes into insoluble formulations, thereby enabling color effects due to reflection and scattering on the pigment particles rather than due to absorption of the dye in solution. It has also been found that this effect is equally applicable to other substances in addition to soluble dyes, converting them to an insoluble state, i.e., lakes them.

[0013] Most polysaccharides are either hydrophilic and water-soluble, such as inulin, maltodextrin, xanthan gum, pectin, gum arabic, ghatti gum, guar or locust bean gum, or water-insoluble, such as cellulose or most hemicelluloses, or water-soluble but with a hydrophobic inner surface, such as starch, amylose or amylopectin, and are not suitable for encapsulating hydrophilic dyes.

[0014] Surprisingly, it has been found that a water-swellable, hydrophilic, but water-insoluble polysaccharide comprising, and preferably consisting essentially of, at least one β-1,4-mannan, and obtained in particular from the endosperm of the tagua nut fruit, serves very well as a substrate for encapsulating soluble dyes. The dried endosperm is very hard and has historically been used, for example, to make buttons, and therefore the tagua nut endosperm itself is often referred to as "tagua nut."

[0015] The main component of tagua nut polysaccharides is mannan, which has the desired properties. The statement "consists essentially of β-1,4-mannan" refers to the fact that the carrier material for the dye according to the invention, when using natural sources such as tagua nut, may contain, in addition to β-1,4-mannan, other mannans or polysaccharides due to the biological origin of the plant. Synthetic β-1,4-mannans may also be used within the scope of the present invention for matrix encapsulation of dyes.

[0016] Substrate encapsulation with tagua nut polysaccharides has been observed to increase the oxidative or hydrolytic stability of the encapsulated dye.

[0017] A decisive advantage over commercially available lakes is the fact that no metal salts are used in the "insolubilization" process with β-1,4-mannan and especially tagua nut polysaccharides, thereby completely avoiding chemical reactions with metal salts that could result in color changes. Thus, the color remains unchanged, a problem that has been previously unsolved, especially with regard to the laking of anthocyanins.

[0018] The colorant according to the invention, and preferably the pigment contained therein, has a particle size D in the range up to about 120 μm, preferably up to 100 μm, more preferably from about 0.5 μm to about 50 μm, even more preferably from about 1 μm to about 20 μm, most preferably about 15 μm. 90.3 It is provided in the form of a powder having the formula:

[0019] Within the scope of the present invention, the colorant may also contain one or more further ingredients and / or auxiliary substances, preferably selected from the group consisting of vitamins, physiologically active ingredients and active substances, pharmaceutical active substances and fillers, and mixtures of at least two of the aforementioned ingredients and / or additives.

[0020] It will be appreciated that the present invention is not limited to soluble dyes. Rather, the present invention provides insoluble products, preferably comprising at least one β-1,4-mannan obtained from tagua nut endosperm, and at least one soluble substance selected from the group consisting of dyes, flavorings, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the foregoing. In particular, the present invention provides colored products, preferably wall paints, artistic paints, artisan paints or lacquers, foodstuffs, luxury foods, dietary supplements, cosmetics, or pharmaceuticals, that contain the colorants described above.

[0021] FIG. 4 shows a schematic representation of a colored product 4. This could be, for example, a drink. Any other possible application of the colored product is also contemplated, such as general paints and lacquers, cosmetics, pharmaceuticals, dietary supplements, food products, etc. The product 4 is packaged in a container 5 and comprises a colorant 1 with colorant pigments 10 dispersed therein. For simplicity, the pigments are shown as all the same size, but the colorant pigments may have a particle size distribution that can be determined as follows:

[0022] Particle size distribution was measured by laser light diffraction using a Malvern Mastersizer 3000 instrument using a detection and calculation method based on Mie theory.

[0023] Characteristic parameter D x The specification should be understood as the normal standard deviation for particle size distribution measurement using laser light diffraction. One skilled in the art would be able to determine the standard deviation based on multiple measurements of the colorant or pigment in question.

[0024] The most desirable particle size to aim for is D 90.3 The value corresponds to approximately 15 μm, which means that in the particle size distribution determined by laser light diffraction, 90% of all particles present or obtained have a particle size of less than 15 μm.

[0025] In the present invention, the dye is a color-imparting substance that is soluble in water or other solvents, and can be selected from the group consisting of at least one natural dye, at least one synthetic dye, and / or a mixture thereof.

[0026] Of particular interest for the present invention was the conversion of soluble natural dyes, i.e., dyes that are soluble in water or other solvents, into insoluble lakes or dyes. "Natural dyes" in the sense of the present invention are understood to mean dyes of plant or animal origin. Preference is given to dyes obtained from plants (or plant parts). Depending on the desired dye, different parts of the plant are preferably suitable for this purpose. However, it will be understood that dyes can be obtained from several parts of a plant. A detailed description of natural dyes can be found, inter alia, in "Handbuchder Natuafarbstoffe: Vorkommen, Verwendung, Nachweis" (English: Handbook of Natural Dyes: Occurrence, Use, Detection) by H. Schweppe, publishing house ecomed, 1993, Landsberg / Lech, known to those skilled in the art.

[0027] The amount of soluble dye in the colorant according to the present invention can be up to 50% by weight, based on the total weight of the colorant. Preferably, the dye percentage is from about 0.001 to about 20% by weight, and most preferably from about 0.05 to about 20% by weight.

[0028] The amount of polysaccharide in the colorant according to the present invention may be up to 99.999% by weight, based on the total weight of the colorant. The minimum proportion of polysaccharide is preferably about 50% by weight. Most preferably, the amount of polysaccharide ranges from about 80 to about 99.95% by weight, based on the total weight of the colorant.

[0029] The colorant according to the invention may preferably comprise one or more further ingredients and / or auxiliary substances selected from the group consisting of vitamins, physiologically active ingredients and / or active substances, and pharmaceutically active substances, and mixtures of at least two of the above ingredients.

[0030] The colorant is preferably a solid, a powdery solid. The colorant can then be further processed depending on the intended use. For example, the colorant can be combined with one or more other ingredients and / or auxiliary substances. Preferred ingredients can be selected from the group including, for example, vitamins, physiologically active ingredients and / or active substances and / or medicinal active substances, and mixtures of at least two of the above ingredients.

[0031] The present invention therefore allows the use of the colorants according to the present invention to incorporate at least one dye into wall paints, artist paints, artisan paints and lacquers, or other paints and lacquers known to those skilled in the art, as well as into foodstuffs, dietary supplements, cosmetics, or pharmaceuticals. Since the present invention is also suitable for insolubilizing not only dyes but also other soluble substances, the present invention also provides an insoluble product comprising at least one β-1,4-mannan, preferably obtained from tagua nut endosperm, and at least one soluble substance 3 selected from the group consisting of dyes, fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the above substances.

[0032] The colorants or insoluble products according to the invention can be used directly, but can also be used within the scope of the present invention in a hydrophobic form. Particularly suitable for hydrophobization are agents such as alkyltrialkoxysilanes, for example octyltriethoxysilane.

[0033] The present invention also has as its object a method for producing a colorant according to the invention, preferably a colorant or pigment insoluble in water or other solvents, or said insoluble product, comprising: (a) providing a powder comprising at least one water-swellable, hydrophilic but water-insoluble polysaccharide; (b) swelling the powder of step (a) in an aqueous solution; (c) contacting the mixture obtained in step (b) with at least one substance selected from the group consisting of dyes, fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the foregoing substances; (d) Separating excess liquid from the mass obtained in step (c) to obtain a solid phase (100).

[0034] 2a shows a flow chart of the method according to the invention. In step (a), at least one water-swellable, hydrophilic but water-insoluble polysaccharide 2 is provided, particularly in powder form. This is mixed with water or saline solution 6. In step (b), the polysaccharide swells in the aqueous solution, forming a mixture 7. In step (c), the mixture 7 obtained in step (b) is contacted with at least one dye 3. A mass 8 is obtained. In step (d), excess liquid 9 is separated from the mass 8 obtained in step (c) to obtain a solid phase 100. Within the scope of the present invention, the mass 8, the solid phase 100, or the solid phase 100 in a further processed form can be used as a colorant, depending on the application.

[0035] Within the scope of the present invention, the solid mass 100 can be further processed to meet different requirements, e.g., regarding further processing, transportation, and storage. For example, the mass 100 can be dried in step (d1) (see FIG. 2b). The dried mass 110 can be comminuted in step (e) to obtain a powder 111. The comminuted mass in step (e) may in particular be achieved by grinding.

[0036] The polysaccharides of step (a) may in particular be obtained from the endosperm of the tagua nut fruit. For this purpose, dried tagua nut endosperm can be ground and further used as a powder. The polysaccharides are available in particular in powder form with particle sizes D up to 200 μm. 90.3 , preferably a particle size D up to 100 μm 90.3, more preferably a particle size D of from about 0.5 μm to about 50 μm 90.3 , and even more preferably a particle size D of from about 1 μm to about 20 μm 90.3 , most preferably a particle size D of approximately 15 μm 90.3 The particle size was determined as described above.

[0037] The aqueous solution of step (b) may contain at least one salt. A person skilled in the art will adjust the solution and salt content so that the swelling characteristics are optimized for each application. Further possibilities for influencing the swelling characteristics are offered by the choice of salt, the temperature and duration of swelling, as well as other parameters, such as adjusting the stirring speed for discontinuous swelling in a stirred tank, or adjusting the energy density introduced into the suspension of powder and aqueous solution.

[0038] Preferably, the salt is suitable for foodstuffs, cosmetics, and / or pharmaceuticals, and is preferably an alkali or alkaline earth chloride such as potassium chloride, sodium chloride, magnesium chloride, or calcium chloride, with table salt (sodium chloride) being particularly preferred. At least one salt may be a mixture of at least two of the aforementioned chlorides. The preferred amount of salt ranges from about 1 to about 40% by weight, preferably about 10 to 25% by weight, and most preferably 20% by weight, based on the total weight of the aqueous solution. The optimal duration of swelling is about 30 minutes to 24 hours, preferably 45 minutes to 12 hours, and most preferably 1 to 2 hours. The optimal temperature in step (b) is between about 15°C and about 40°C, preferably about 18°C ​​to 30°C, and most preferably about 20°C to about 25°C.

[0039] The "contacting" in step (c) can be achieved using any technique suitable for this purpose and known to those skilled in the art, preferably by mixing. In step (c), matrix encapsulation is performed. The dye (or other soluble substance, described in more detail below) as the active ingredient is homogeneously mixed with a polysaccharide as the outer shell component or "matrix," which contains at least one β-1,4-mannan, and preferably consists essentially of β-1,4-mannan. This produces a mixture in which the active ingredient is evenly distributed in the matrix.

[0040] In the present invention, a color-imparting substance soluble in water or another solvent is used as a dye. The dye can be selected from the group consisting of at least one natural dye, at least one synthetic dye, and / or a mixture thereof. Therefore, in the context of the present invention, the at least one dye is selected from the group consisting of natural and / or synthetic dyes that are soluble in water or another solvent, and a mixture of at least two such natural and / or synthetic dyes. Natural dyes are preferred. The soluble dyes used in the method according to the present invention may be obtained in the form of a plant extract.

[0041] The separation step (d) may be achieved using any technique suitable for this purpose and known to those skilled in the art, preferably by filtration, centrifugation or drying. Separation of the solid phase from the liquid phase results in a separate solid phase containing the target product (colorant).

[0042] In one advantageous refinement of the invention, the method further comprises the following step: (d1) drying the mass obtained in step (c) and / or the solid phase obtained in step (d).

[0043] It is particularly advantageous if the separation in step (d) is preferably carried out by filtration or centrifugation and is supported by a drying step (d1). In one simple embodiment, the separated solid phase, for example in the form of a filter cake, can be passed by airflow towards the filter bed, in particular at a pressure in the range up to 5 bar, preferably at a pressure of 2 bar. Inert gas can also be used instead of compressed air. In the drying step (d1), it is preferred that the product temperature reaches approximately 70°C or less, preferably in the range from approximately 55°C to approximately 68°C. It is particularly preferred that the product temperature does not exceed 65°C. The term "product temperature" refers to the temperature of the material to be dried.

[0044] In one advantageous refinement of the invention, the method further comprises the following step: (e) The particularly dried target product, i.e., the solid phase, which may be the solid phase obtained in step (d), is ground to a particle size D of up to 100 μm, preferably from about 0.5 μm to about 50 μm, more preferably from about 1 μm to about 20 μm, and most preferably about 15 μm. 90.3 Obtaining a powder having Particle size can be measured as described above.

[0045] In one further refinement of the above method, the further step may be included: (f) the mixture of swollen polysaccharide and at least one dye in an aqueous solution obtained in step (c), and / or the solid phase isolated in step (d), and / or the solid phase dried in step (d1), and / or The dried solid phase pulverized in step (e) In particular for products selected from the group consisting of wall paints, artistic paints, artisan paints and lacquers, foodstuffs, luxury foods, dietary supplements, cosmetics and pharmaceuticals. To introduce. In this way, a colored product can be produced.

[0046] The method according to the present invention can be used not only to convert dyes but also other soluble substances into insoluble forms. Encapsulation according to the present invention can, in particular, protect the encapsulated substance from oxidation. Encapsulation also makes it possible to convert a liquid or paste into a solid dosage form and stabilize it against other substances present in the final formulation (foodstuff, cosmetic, or pharmaceutical). The substance can then be selected for its intended insoluble form. Therefore, a further object of the present invention is an insoluble product comprising at least one polysaccharide, preferably containing at least one β-1,4-mannan, obtained from the endosperm of tagua nut fruit, and at least one soluble substance selected from the group consisting of dyes, flavors, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the above substances.

[0047] Furthermore, the present invention also encompasses a method for producing an insoluble product that is soluble in water or another solvent and contains at least one substance selected from the group consisting of dyes, fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the aforementioned substances, using at least one polysaccharide, preferably comprising at least one β-1,4-mannan, and particularly preferably consisting essentially of β-1,4-mannan, obtained in particular from the endosperm of the tagua nut fruit. It is preferred to use at least one such polysaccharide, especially from the endosperm of the tagua nut fruit, to produce an insoluble colorant containing at least one soluble dye.

[0048] The present invention will be described with reference to the accompanying examples, but is not limited to the specifically described embodiments. The present invention will also be described with reference to any combination of preferred embodiments, which are not mutually exclusive. The term "about" or "approximately" in combination with a numerical value means that values ​​at least 10% higher or lower, or 5% higher or lower, or in any case 1% higher or lower, will be included. Values ​​higher or lower by at least a standard deviation obtained from at least three independent measurements of a variable will be included in the specified numerical value of the variable. [Example]

[0049] Colors from colorants are described using the CIELAB color space, where the color is expressed as L * value, a * value, and b * It is represented by a value. The CIELCh color space is expressed in Cartesian coordinates a * and b * Instead of cylindrical coordinates C * (relative saturation or chroma) and h (hue angle). In this case, the color lightness L * is unchanged. Common shorthand notations for this color space are LCh, LCH, and HLC (hue H; lightness L; saturation C).

[0050] Example 1: Encapsulation of red radish anthocyanins in tagua nut polysaccharides (swelled in saline) Dissolve 20g of table salt in 100ml of boiling water. Add granular particles of D size to this salt water. 90.3 50 g of YuraQ M (Tagua Nut Polysaccharide) (product of Deler GmbH) with a particle size of 15 μm is added with gentle stirring and left to swell for 1 hour at 20°C while stirring. 50 g of anthocyanin extract from red radish (H95113 Cos Red Radish) with an anthocyanin content of 4.0% by weight is added and stirred until a homogeneous dough mass is obtained (approximately 1 hour). The mass is then filtered to separate excess liquid. The separated mass is then dried in a stream of air, ensuring that the product temperature does not exceed 65°C. Finally, the dried product is again placed in a D 90.3 The yield was 98% by weight based on the total amount of YuraQ M and anthocyanin extract.

[0051] The color values ​​of this powder were measured using a color measuring device "Digieye" (Veribide, Leicester, UK) under diffused lighting and a color temperature of 5000K. * a * b * and C and H values ​​were obtained. [Table 1]

[0052] Example 2: Encapsulation of red radish anthocyanins in tagua nut polysaccharides (swellable in pure water) Particle size D 90.3 50 g of YuraQ M (Deler) with a pore size of 15 μm is added to purified water with gentle stirring and left to swell for 2 hours at 20°C while stirring. 50 g of anthocyanin extract from red radish (H95113 Cos Red Radish) with an anthocyanin content of 4.0% by weight is added and stirred until a uniform dough mass is obtained (approximately 1 hour). The mass is then filtered to separate excess liquid. The mass is then dried in a stream of air, ensuring that the product temperature does not exceed 65°C. Finally, the dried product is again placed in a D 90.3 The yield was 98% by weight based on the total amount of YuraQ M and anthocyanin extract.

[0053] The color values ​​of this powder were measured using a color measuring device "Digieye" (Veribide, Leicester, UK) under diffused lighting and a color temperature of 5000K. * a * b * and C and H values ​​were obtained. [Table 2]

[0054] Examples 3 to 15: Encapsulation of various natural dyes in tagua nut polysaccharides (swelled in saline solution) Further soluble dyes or color emulsions were encapsulated in tagua nut polysaccharides in the same manner as in Example 1. In all examples, particle size D 90.3 The tagua nut polysaccharide "YuraQ" from Deler GmbH, with a diameter of 15 μm, was used. To demonstrate the wide applicability of the obtained products, after coloring, these products were crushed or sieved and analyzed using two different D 90.3 Two powders with different particle sizes were obtained. In this way, two different colors were obtained: particle size D 90.3The powder with a particle size of 15 μm has a pastel color. 90.3 Powders with particle sizes of about 100 μm or less have a slightly darker color (see Table 3 and Figure 2). The smaller the particle size of a pigment, generally, the higher the lightness (L) and chroma (C) of the color. C (= chroma) represents vividness. The higher the C value, the more vivid the pigment.

[0055] The dyes listed below were considered. The serial numbers in the table correspond to the product numbers used by Dehler GmbH. Where two Dehler product numbers are shown below, they refer to the same product and a document is assigned under each product number depending on the intended use. For example, the same composition could be assigned one product number in the "Food" category and one in the "Cosmetics" category.

[0056] "Spirulina" This term refers to the composition of Daehler Product No. 215048, which consists of 55% by weight of Spirulina platensis extract, 40% by weight of trehalose, and 5% by weight of sodium citrate.

[0057] "Black Diamond" This term refers to the compositions of Dehler product numbers 9544319 and 920154, which consist of glycerol (E422), dye concentrate from spirulina, barley malt extract (barley malt, water), dye concentrate from beetroot, water, the acidulant citric acid (E330), and the antioxidant ascorbic acid (E300), respectively. They are clear, black liquids with the following properties: Brix measured by refractive index at 20°C of 65.0 ± 3°C, pH of 41 ± 0.9, density measured gravimetrically at 20°C using a U-tube oscillator of 1.273 ± 0.005, and acidity (CAA, calculated at pH = 8.1) of 0.25 ± 0.25 g per 100 g as determined by titration.

[0058] "Yellow carrot" This term refers to the compositions of Daehler product numbers 995097 and 794530, which respectively consist of 48.4 to 52.4% by weight of maltodextrin, 42.6 to 46.6% by weight of Daucus carota sativa root extract, 3 to 4% by weight of caprylic / capric acid glyceride, and 1 to 2% by weight of citric acid, the percentages of the above substances adding up to 100% by weight.

[0059] "Orange Carrot" This term refers to the compositions of Daehler product numbers 995095 and 794531, which consist of 37 to 42% by weight of maltodextrin and 58 to 63% by weight of Daucus carota sativa root extract, respectively, the percentages of these substances adding up to 100% by weight.

[0060] "malt" The term stands for "Cos Malt Extract Powder" and refers to malt extract (Hordeum vulgare) with CAS number 8002-48-0.

[0061] "Madison root" This term refers to the product "NIG Dyestuff 11-MAD-COLOR" with CAS number 84650-16-8.

[0062] "Cos Natural Red" This term is an abbreviation for "Cos Natural Beta Carotene Red (Blakeslea trispora) Liq." This refers to the compositions of Dehler product numbers 995212 and 970810, which respectively contain 4 to 5.5% by weight of beta-carotene from Blakeslea trispora, 40 to 45% by weight of glycerol, 37 to 43% by weight of water, 8.5 to 11.5% by weight of gum arabic (Acasia Senegal gum), 0.7 to 1.1% by weight of ascorbic acid, 0.3 to 0.9% by weight of citric acid, and 0.09 to 0.2% by weight of tocopherol, the percentages of these substances adding up to 100% by weight.

[0063] "Beetroot" This term refers to the compositions of Dehler product numbers 968741 and 881004, which respectively consist of 48.5 to 53.5% by weight of maltodextrin, 45.5 to 50.5% by weight of beetroot red (E162), 0.3 to 0.5% by weight of citric acid, and 0.05 to 0.15% by weight of ascorbic acid, the proportions of these substances adding up to 100% by weight.

[0064] "Red radish" This term refers to the composition of Daehler Product No. 995113, which consists of 47.2 to 52.2% by weight of maltodextrin, 46.3 to 51.3% by weight of Raphanus sativus root extract, and 1.3 to 1.7% by weight of citric acid, the percentages of the above substances adding up to 100% by weight.

[0065] [Table 3]

[0066] Figure 3 shows a photograph of a powder sample of colorant 1 of this example. The upper part shows the particle size distribution D 90.3 = 100 micrometer sample, bottom row is D 90.3 = 15 micrometer sample. Samples from Examples 5 (bottom) and 6 (top) containing the dye "Black Diamond" are shown on the far left. The second sample from the left is D 90.3 = 100 micrometer particle size distribution. 90.3 To the right of the sample of colorant containing the dye "madder root" is a sample from Example 9 with a particle size distribution of D = 15 micrometers. 90.3 The sample containing the dye "malt" is shown with a particle size of 15 micrometers. The sample containing the dye "madder root" was not ground in the test. In general, the same trend was observed for all dyes tested: the larger the particle, the darker the color.

[0067] In the center of the figure, samples from Examples 11 (top) and 10 (bottom) containing the dye "Orange Carrot" are shown to the left of samples from Examples 8 (top) and 7 (bottom) containing the dye "Yellow Carrot." On the far right are the samples from Examples 4 (bottom) and 3 (top) using the dye "Spirulina." The second sample from the right is D 90.3 = 100 micrometers and D 90.3 This sample corresponds to the results of Example 1, and the particle size distribution of the dye "Red Radish" is 15 micrometers. 90.3 The sample with a diameter of 100 micrometers is used for visual comparison. To the left of the sample containing the colorant containing the dye "Red Radish" is the D 100 micrometer sample from Example 15. 90.3 A sample of the pigment "Beetroot" is shown, having a particle size distribution of 15 micrometers.

[0068] Those skilled in the art will appreciate that the invention is not limited to the embodiments described above, but rather can be modified in various ways, in particular the features of the embodiments presented individually can also be combined with one another or substituted for one another. [Explanation of symbols]

[0069] 1 colorant 10 Pigments 2 Polysaccharides; Polysaccharides containing at least one β-1,4-mannan; Polysaccharides consisting essentially of β-1,4-mannan; Polysaccharides obtained from the endosperm of tagua nut fruit 3 dye 4. Products 5 containers 6. Water, salt water 7. The mixture obtained in step (b) 8. The mass obtained in step (c) 9 liquid 100 Solid phase obtained in step (d) 110 Dry solid phase obtained in step (d1) 111 The pulverized dry solid phase obtained in step (e1); powder

Claims

1. at least one water-swellable, hydrophilic but water-insoluble polysaccharide (2); and at least one dye (3) A colorant (1) having at least one pigment (10) comprising:

2. The at least one polysaccharide (2) comprises at least one β-1,4-mannan, preferably consisting essentially of β-1,4-mannan, in particular obtained from the endosperm of the tagua nut fruit. Characterized by A colorant (1) according to claim 1.

3. The at least one dye (3) is selected from the group comprising natural and / or synthetic dyes, which are soluble in water or other solvents, and mixtures of at least two of such natural and / or synthetic dyes. Characterized by A colorant (1) according to claim 1 or 2.

4. The colorant (1) is in the form of powder (111), and its particle size D ９０．３ is particularly in the range of up to about 120 μm, preferably up to 100 μm, more preferably from about 0.5 μm to about 50 μm, even more preferably from about 1 μm to about 20 μm, and most preferably about 15 μm; the colorant (1) optionally comprises one or more further ingredients and / or auxiliary substances, preferably selected from the group comprising vitamins, physiologically active ingredients and active substances, pharmaceutical active ingredients, and fillers, as well as mixtures of at least two of the aforementioned ingredients and / or auxiliary substances, Characterized by A colorant (1) according to any of the preceding claims.

5. An insoluble product (4) containing at least one β-1,4-mannan, preferably obtained from the endosperm of tagua nut, and containing at least one soluble substance (3) selected from the group consisting of dyes, flavorings, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the aforementioned substances; In particular the coloured product (4) is preferably a wall paint, an artistic paint, a craftsman's paint or lacquer, a foodstuff, a luxury food, a dietary supplement, a cosmetic or a pharmaceutical product, comprising a colouring agent (1) according to any of the preceding claims.

6. The colorant (1) or the insoluble product (4) is preferably provided in hydrophobized form by hydrophobization with at least one alkyltrialkoxysilane, in particular by hydrophobization with octyltriethoxysilane. A colorant (1) or an insoluble product (4) according to any of the preceding claims, characterized in that

7. A method for producing a colorant (1) according to any one of claims 1 to 4, which contains at least one pigment, or an insoluble product (4) according to claim 5, which comprises the following steps: (a) providing a powder comprising at least one water-swellable, hydrophilic but water-insoluble polysaccharide (2); (b) swelling the powder of step (a) in an aqueous solution; (c) contacting the mixture (7) obtained in step (b) with at least one substance selected from the group consisting of dyes (3), fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the foregoing substances; (d) Separating excess liquid (9) from the mass (8) obtained in step (c) to obtain a solid phase (100).

8. The at least one polysaccharide (2) in step (a) comprises at least one β-1,4-mannan, preferably consisting essentially of β-1,4-mannan, in particular obtained from the endosperm of the tagua nut fruit. Characterized by The method of claim 7.

9. The polysaccharide (2) has a particle size D of up to 200 μm, preferably from about 0.5 μm to about 50 μm, more preferably from about 1 μm to about 20 μm, and most preferably about 15 μm. ９０．３ provided in the form of a powder having characterized in that 9. The method of claim 7 or 8.

10. The aqueous solution referred to in step (b) may contain at least one salt suitable for foodstuffs, cosmetics and / or pharmaceuticals, preferably selected from the group comprising alkali or alkaline earth chlorides, such as potassium chloride, sodium chloride, magnesium chloride and calcium chloride, as well as mixtures of at least two of the aforementioned chlorides. characterized in that 10. The method according to any one of claims 7 to 9.

11. (d1) drying the mass (8) obtained in step (c) or the solid phase (110) obtained in step (d); 11. The method of any of claims 7 to 10, comprising the further step:

12. (e) The target product, in particular the dried product obtained in step (d), i.e. said solid phase (110), is ground to a particle size D of up to 200 μm, preferably from about 0.5 μm to about 50 μm, more preferably from about 1 μm to about 20 μm, most preferably about 15 μm. ９０．３ Obtain a powder (111) having 12. The method of any of claims 7 to 11, comprising a further step.

13. (f) the mixture (8) of swollen polysaccharide and at least one dye in aqueous solution obtained in step (c); and / or the solid phase (100) isolated in step (d); and / or the solid phase (110) dried in step (d1); and / or The dry solid phase (111) pulverized in step (e), In particular, it is incorporated into products (4) selected from the group consisting of wall paints, artistic paints, artisan paints or lacquers, foodstuffs, luxury foods, dietary supplements, cosmetics and pharmaceuticals.

13. The method of any of claims 7 to 12, comprising a further step.

14. The dye (3) is a natural and / or synthetic dye soluble in water or other solvents; or Additionally, or as an alternative to said at least one dye, step (c) comprises introducing a substance soluble in water or another solvent, said substance being selected in particular from the group consisting of fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements and mixtures of at least two of the aforementioned substances, The substance is soluble in water or other solvents characterized in that 14. The method according to any one of claims 7 to 13.

15. To produce an insoluble product (4) containing at least one substance soluble in water or another solvent, in particular selected from the group consisting of dyes, fragrances, pharmaceutical active ingredients, antioxidants, cosmetic active ingredients, dietary supplements, and mixtures of at least two of the aforementioned substances, The method utilizes at least one polysaccharide (2), which preferably comprises at least one β-1,4-mannan, particularly preferably consists essentially of β-1,4-mannan, in particular obtained from the endosperm of tagua nut fruit.

Images