Thixotropic water slurry as well as preparation method and application thereof

Abstract

The invention relates to the field of cosmetics, and particularly discloses thixotropic water slurry as well as a preparation method and application thereof, and the thixotropic water slurry comprises the following components in percentage by mass: 39-72% of inorganic toner; 8-20% of a humectant; 0.5-2% of an emulsifier; 0.2-1% of a dispersant; and the balance of water. The preparation method comprises the following preparation steps: step 1, heating and melting the emulsifier to form a liquid emulsifier; step 2, shearing and dispersing a dispersing agent, water and a humectant under a heating condition, and then adding inorganic toner for shearing and dispersing to obtain a mixture; and step 3, shearing and dispersing the liquid emulsifier and the mixture to room temperature, and grinding and dispersing to obtain the thixotropic water slurry. The thixotropic water slurry has the advantages of low-viscosity flowable powder slurry in use and high-viscosity non-flowable powder slurry in storage, meanwhile, the long-term dispersion stability of the toner is ensured, and the thixotropic water slurry is easily and uniformly mixed with an application system.

Description

Technical Field

[0001] The present application relates to the field of cosmetics, and more specifically, to a thixotropic aqueous slurry, a preparation method thereof, and an application thereof. Background Art

[0002] At present, inorganic powder pigments (such as titanium dioxide, iron oxide, ultramarine, chromium oxide green, etc.) as the core coloring components of color cosmetic products generally have inherent defects of high surface energy and easy particle agglomeration. This agglomeration phenomenon not only makes it difficult to disperse the pigments in the formulation system, and the more the addition amount of inorganic powder, the more difficult the dispersion is, but also directly affects the stable performance of coloring strength and covering power.

[0003] The existing powder slurries are mainly divided into two categories according to rheological properties: one is a low-viscosity flowable powder slurry (viscosity < 5000 mPa·s), which has good pourability and dispersion efficiency, but has obvious storage stratification problems; the other is a high-viscosity non-flowable powder slurry (viscosity > 50,000 mPa·s), which effectively inhibits stratification but significantly reduces the use convenience. This "fluidity-stability" antinomy relationship has become a key technical bottleneck restricting the development of water-based color cosmetic products.

[0004] With the rapid evolution of the global cosmetics market towards water-based and environmental protection directions, there is an urgent need to develop a thixotropic aqueous slurry with excellent thixotropy, having the advantages of a low-viscosity flowable powder slurry during use and a high-viscosity non-flowable powder slurry during storage. Summary of the Invention

[0005] The present application provides a thixotropic aqueous slurry, a preparation method thereof, and an application thereof. The thixotropic aqueous slurry can maintain the structural strength to resist stratification in the storage static state, and rapidly reduce viscosity under the action of stirring during use to achieve smooth pouring and rapid dispersion. It has excellent thixotropy, has the advantages of a low-viscosity flowable powder slurry during use and a high-viscosity non-flowable powder slurry during storage, while ensuring the long-term dispersion stability of color powder and being easily mixed uniformly with the application system.

[0006] In the first aspect, a thixotropic aqueous slurry provided by the present application adopts the following technical solution: A thixotropic aqueous slurry, comprising the following components in mass percentages: Inorganic color powder 39 - 72%; Humectant 8 - 20%; Emulsifier 0.5 - 2%; Dispersant 0.2 - 1%; The balance is water; The emulsifier includes one or more of behenic acid amide, laureth-9, sorbitan sesquiisostearate, oleth-20, Tween 60, PEG-26 / PPG-30 phosphate, glyceryl stearate, PEG-100 stearic acid, ammonium polyacrylate; The dispersant includes one or more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, acrylate copolymer, polyvinylpyrrolidone, polyacrylate, hydrogenated castor oil, polyacrylamide.

[0007] By adopting the above technical solution, through the synergistic effect of 39-72% high-solid-content inorganic color powder and a rheological system with a specific ratio, a thixotropic system with a three-dimensional network structure is constructed. When standing, hydrogen bonds and van der Waals forces form a cross-linked network to resist gravitational settlement; when shearing, the network dissociates to achieve fluidity. Among them, the hydrophobic group in the emulsifier and the hydrophilic segment of the dispersant form an "anchoring-stretching" structure to prevent the agglomeration of inorganic color powder through steric hindrance; after the polymer chain of the dispersant is adsorbed on the surface of the inorganic color powder, its unadsorbed segments form a hydration layer with water molecules to reduce the surface energy; the humectant adjusts the polarity of the system through hydrogen bonds and synergistically controls the network strength and dissociation threshold. By compounding the emulsifier with the dispersant to construct a dynamic microstructure, the dispersant forms a gel network, and the network structure formed by the dispersant is destroyed under the action of shear force to reduce the viscosity of the system; after the shear force disappears, the network structure is re-formed through hydrogen bonds and van der Waals forces to restore thixotropy, and the two work together to achieve the balance of shear thinning and thixotropic recovery.

[0008] The water slurry obtained by using the specific ratio components of the present application can maintain the structural strength to resist stratification in the storage and standing state, while quickly reducing the viscosity under the action of stirring during use to achieve smooth pouring and rapid dispersion, with excellent thixotropy, having the advantages of a low-viscosity flowable powder slurry during use and a high-viscosity non-flowable powder slurry during storage, while ensuring the long-term dispersion stability of the inorganic color powder and being easily mixed uniformly with the application system.

[0009] Preferably, the emulsifier is a mixture of glyceryl stearate, PEG-100 stearic acid, behenic acid amide and PEG-26 / PPG-30 phosphate.

[0010] By adopting the above technical solution, glyceryl stearate (HLB = 3.8) and PEG-100 stearic acid (HLB = 18) form a complementary HLB pair, which can effectively disperse the non-polar oil phase; the long-chain alkyl group of the behenic acid amide adopted enhances the mechanical strength of the interfacial film, and PEG-26 / PPG-30 phosphate affects the viscoelasticity of the system by adjusting the hydrophobic / hydrophilic balance of the molecular chain, enhances the thixotropic response speed, provides steric hindrance and charge repulsion effects, and can effectively stabilize the dispersion state of the inorganic color powder. The four-component emulsifier cooperates with each other to control the hydrophilic-lipophilic balance of the system and synergistically improve the thixotropy of the system.

[0011] Preferably, the mass ratio of glyceryl stearate, PEG-100 stearate, behentrimonium methosulfate, and PEG-26 / PPG-30 phosphate is (0.5 - 1):(0.1 - 0.5):1:(0.2 - 1).

[0012] Through a large number of R & D tests, under the above ratio, the dosage relationship between glyceryl stearate and PEG-100 stearate can optimize the gradient polarity distribution of the system; PEG-26 / PPG-30 phosphate maintains the dispersion of components through charge repulsion, and behentrimonium methosulfate can assist in forming a crystal network structure, endowing the system with shear thinning characteristics (i.e., thixotropy), with high viscosity at rest to maintain suspension stability and reduced viscosity under shear force during use. This compound emulsification system with a specific ratio achieves thixotropic aqueous slurry with high viscosity at rest to maintain suspension stability and low viscosity during dynamic use through multi-mechanism synergy, while also making the aqueous slurry have the advantages of stability, component compatibility, and smooth skin feel.

[0013] Preferably, the dispersant is carboxymethyl cellulose.

[0014] By adopting the above technical solution, selecting carboxymethyl cellulose as the dispersant, the dynamic emulsion network formed by glyceryl stearate and PEG-100 stearate can provide a dispersion carrier for carboxymethyl cellulose, while reducing the interfacial tension and promoting the orderly arrangement of carboxymethyl cellulose molecular chains. The long-chain fatty acids of behentrimonium methosulfate and the carboxymethyl groups of carboxymethyl cellulose form a hydrophobic-hydrophilic biphasic interaction, and the phosphate ester groups in the emulsifier form hydrogen bonds with carboxymethyl cellulose, generating a synergistic polarization effect and enhancing the thixotropic recovery ability of the system.

[0015] Preferably, the inorganic color powder includes one or more of titanium dioxide, iron oxide yellow, iron oxide black, iron oxide red, ultramarine blue, and chromium green.

[0016] Preferably, the particle size of the inorganic color powder is in the micron or nanometer range.

[0017] In this system, the selection of inorganic color powder can be adjusted according to actual conditions. Selecting inorganic color powder with micron or nanometer size is more conducive to uniform dispersion in the system and improving the color rendering effect of the product.

[0018] Preferably, the humectant includes one or more of glycerin, butylene glycol, propylene glycol, polyethylene glycol, hexylene glycol, xylitol, polypropylene glycol, sorbitol, and sodium hyaluronate.

[0019] Furthermore, the humectant is preferably glycerin.

[0020] By adopting the above technical solution, selecting glycerin as the humectant can form a dense hydrogen bond network with water, increase the polarity of the system, and inhibit phase separation at low temperatures.

[0021] In a second aspect, the present application provides a method for preparing a thixotropic aqueous slurry, adopting the following technical solution: A method for preparing a thixotropic aqueous slurry, comprising the following preparation steps: Step 1: Heat and melt the emulsifier to form a liquid emulsifier; Step 2: Perform shear dispersion on the dispersant, water, and humectant under heating conditions, and then add inorganic color powder for shear dispersion to obtain a mixture; Step 3: Shear-disperse the liquid emulsifier and the mixture to room temperature, and obtain a thixotropic aqueous slurry after grinding and dispersion.

[0022] Preferably, in Step 1 and Step 2, the heating temperature is 70 - 90 °C.

[0023] Furthermore, the shear rate is 2000 - 3000 rpm.

[0024] Furthermore, the equipment used for grinding and dispersion is selected from one of a three-roll mill, a sand mill, a colloid mill, a ball mill, and a shear-type high-speed stirrer.

[0025] By adopting the above technical solution, at 70 - 90 °C, the emulsifier melts to form a liquid crystal phase, the interfacial tension decreases, and high shear rate generates turbulent vortices, realizing the primary dispersion of inorganic color powder; after uniformly dispersing the liquid emulsifier and the mixture, during the cooling process, the components crystallize directionally to construct a network skeleton.

[0026] In a third aspect, the present application provides an application of a thixotropic aqueous slurry, adopting the following technical solution: An application of a thixotropic aqueous slurry, wherein the thixotropic aqueous slurry is used in a color cosmetic composition.

[0027] Preferably, the color cosmetic composition includes but is not limited to liquid foundation, primer, concealer, water-based eyeliner, contour paste, and liquid highlighter.

[0028] By adopting the above thixotropic aqueous slurry in the color cosmetic composition, it is moist, light, and residue-free, and has a high content of inorganic color powder, which is easily dispersed in water, overcoming the problem of powder agglomeration in water. It has good application in various color cosmetics, simple process operation, high yield, and is easy for large-scale production.

[0029] In summary, the present application has the following beneficial effects: 1. By compounding the emulsifier with the dispersant to construct a dynamic microstructure, the dispersant forms a gel network. Under the action of shear force, the network structure formed by the dispersant is destroyed, reducing the viscosity of the system; after the shear force disappears, the network structure is re-formed through hydrogen bonds and van der Waals forces, restoring thixotropy. The two work together to achieve the balance between shear thinning and thixotropic recovery.

[0030] 2. Through the synergistic effect of 39-72% high-solid inorganic color powder and a rheological system with a specific ratio, a thixotropic system with a three-dimensional network structure is constructed. The resulting water slurry can maintain its structural strength to resist delamination in the static storage state, while quickly reducing its viscosity under the action of stirring during use to achieve smooth pouring and rapid dispersion. It has excellent thixotropy, with the advantages of a low-viscosity flowable powder slurry during use and a high-viscosity non-flowable powder slurry during storage. At the same time, the long-term dispersion stability of the inorganic color powder is ensured, and it is easy to be mixed evenly with the application system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the product diagram after the thermal cycling stability test of Example 2 of this application.

[0032] Figure 2 These are the product diagrams after the thermal cycling stability test of Comparative Examples 1-4 of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will describe the implementation schemes of the present invention in detail in combination with the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. The specific conditions not specified in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase. Embodiments

[0034] Example 1 A thixotropic water slurry, comprising the following components: 39 g of inorganic color powder; 20 g of humectant; 0.2 g of dispersant; 2 g of emulsifier; 38.8 g of water; The preparation method of the thixotropic water slurry comprises the following steps: Step 1, heating the emulsifier to 85 °C to melt it into a liquid emulsifier; Step 2, adding the dispersant to water and the humectant, performing shear dispersion at a temperature of 85 °C, and then adding the inorganic color powder for shear dispersion to obtain a mixture; the shear rate is 2500 rpm; Step 3, shear-dispersing the liquid emulsifier and the mixture to room temperature, and obtaining the thixotropic water slurry after grinding and dispersing with a three-roll mill.

[0035] The preparation methods of Examples 2-7 are the same as that of Example 1, and the component ratios are shown in Table 1.

[0036] Table 1 Inorganic color powder / g Humectant / g Dispersant / g Emulsifier / g Water / g Example 1 39 20 0.20 2 38.80 Example 2 50 15 0.30 2 32.70 Example 3 55 14 0.35 2 28.65 Example 4 72 8 0.40 1 18.60 Example 5 60 16 1 0.5 22.5 Example 6 45 16 0.25 2 36.75 Example 7 42 10 0.5 1.2 46.3 Among the inorganic color pigments in Table 1, the particle sizes are all in the micron range. Specifically, in Example 1, it is iron oxide yellow; in Example 2, it is iron oxide red; in Example 3, it is iron oxide black; in Example 4, it is titanium dioxide; in Example 5, it is ultramarine blue; in Example 6, it is chromium green; and in Example 7, it is a composite color of iron oxide red, iron oxide yellow, and iron oxide black with a mass ratio of 5:5:4.

[0037] For the humectants in Table 1, specifically, in Examples 1 - 5, it is glycerol; in Example 6, it is butanediol; and in Example 7, it is propylene glycol.

[0038] For the dispersants in Table 1, specifically, in Examples 1 - 5, it is carboxymethyl cellulose; in Example 6, it is hydroxyethyl cellulose; and in Example 7, it is polyacrylate.

[0039] For the emulsifiers in Table 1, specifically, in Examples 1 - 5, it is a composite emulsifier of glyceryl stearate, PEG - 100 stearate, behenic acid triglyceride, and PEG - 26 / PPG - 30 phosphate with a mass ratio of 0.65:0.1:1:0.25; in Example 6, it is a composite emulsifier of glyceryl stearate, PEG - 100 stearate, behenic acid triglyceride, and PEG - 26 / PPG - 30 phosphate with a mass ratio of 1:0.5:1:1; and in Example 7, it is a composite of PEG - 26 / PPG - 30 phosphate and behenic acid triglyceride with a mass ratio of 1:1.

[0040] Comparative Example Comparative Example 1 The difference from Example 2 is that the thixotropic aqueous slurry includes the following components: 30 g of inorganic color pigment; 25 g of humectant; 0.2 g of dispersant; 2 g of emulsifier; 42.8 g of water; and the rest are the same as in Example 2.

[0041] Comparative Example 2 The difference from Example 2 is that the thixotropic aqueous slurry includes the following components: 45 g of inorganic color pigment; 30 g of humectant; 4 g of dispersant; 0.2 g of emulsifier; 20.8 g of water; and the rest are the same as in Example 2.

[0042] Comparative Example 3 The difference from Example 2 is that the dispersant is sodium dodecylbenzenesulfonate and the emulsifier is polydimethylsiloxane, and the rest are the same as in Example 2.

[0043] Comparative Example 4 The difference from Example 2 is that the preparation method of the thixotropic aqueous slurry is different. Specifically, the inorganic color pigment, humectant, dispersant, emulsifier, and water are mixed according to the formula amounts and subjected to shear dispersion.

[0044] Application Example Application Example 1 An aqueous eyeliner pencil, comprising the following components: the aqueous slurry of Example 1: 25 g, styrene / acrylic acid (ester) copolymer: 12 g, pentylene glycol: 2 g, phenoxyethanol: 0.4 g, caprylyl glycol: 0.2 g, hexylene glycol: 0.4 g, water: 60 g.

[0045] Application Example 2 An aqueous eyeliner pencil, comprising the following components: the aqueous slurry of Example 2: 20 g, styrene / acrylic acid (ester) copolymer: 12 g, pentylene glycol: 2 g, phenoxyethanol: 0.4 g, caprylyl glycol: 0.2 g, hexylene glycol: 0.4 g, water: 65 g.

[0046] Application Example 3 An aqueous eyeliner pencil, comprising the following components: the aqueous slurry of Example 3: 19 g, styrene / acrylic acid (ester) copolymer: 12 g, pentylene glycol: 2 g, phenoxyethanol: 0.4 g, caprylyl glycol: 0.2 g, hexylene glycol: 0.4 g, water: 66 g.

[0047] Performance Detection Test Test 1 Take the aqueous slurries obtained from Examples 1-7 in any proportion for random compounding. Specifically: compound the thixotropic aqueous slurries obtained from Examples 1 and 2 in a ratio of 1:1, compound the thixotropic aqueous slurries obtained from Examples 2-4 in a ratio of 2:1:1, compound the aqueous slurries obtained from Examples 2 / 6 / 7 in a ratio of 1:2:3, and compound the aqueous slurries of Examples 5 and 6 in a ratio of 3:1, to obtain multiple groups of mixed color pastes. Store them at room temperature for 30 days. After observation, no precipitation or stratification phenomenon is found in all of them.

[0048] Test 2 Detect the aqueous slurries obtained from Examples 1-7 and Comparative Examples 1-4, and record the results in Table 2.

[0049] Thixotropy index: Take 100 g of aqueous slurry and place it in a 150 ml beaker. Use an NDJ-1F type rotational viscometer to measure the viscosities at 6 rpm and 60 rpm respectively, denoted as η1 and η2, and calculate the thixotropy index = η1 / η2.

[0050] Water dispersion test: Take 50 g of deionized water and place it in a 100 ml beaker. Add 0.5 g of aqueous slurry and gently shake for 30 s, and observe the dispersion of the aqueous slurry in deionized water.

[0051] Oil dispersion test: Take 50 g of white oil or silicone oil or paraffinic oil and place it in a 100 ml beaker. Add 0.5 g of aqueous slurry and gently shake for 30 s, and observe the dispersion of the aqueous slurry in white oil or silicone oil or paraffinic oil.

[0052] Residual test: Apply a drop of aqueous slurry on the back of the hand and rinse it with water, and observe whether there is any residue.

[0053] Table 2 Thixotropy coefficient Water dispersion White oil Silicone oil Paraffin oil Residue Example 1 3.8 Yes No No No No residue left Example 2 5.9 Yes No No No No residue left Example 3 5.2 Yes No No No No residue left Example 4 4.6 Yes No No No No residue left Example 5 5.5 Yes No No No No residue left Example 6 3.3 Yes No No No No residue left Example 7 5.1 Yes No No No No residue left Comparative Example 1 2.8 Yes No No No No residue left Comparative Example 2 1.9 Yes No No No No residue left Comparative Example 3 2.2 Yes No No No No residue left Comparative Example 4 2.9 Yes No No No No residue left From the above test results, it can be seen that the water slurries prepared in Examples 1-7 have excellent thixotropy, are not dispersible in oil in water, and leave no residue after washing.

[0054] From Example 1 and Comparative Examples 1-4 and in combination with Table 2, it can be seen that although the products obtained in Comparative Examples 1-4 are also not dispersible in oil in water and leave no residue after washing, the thixotropy of the water slurry products in Comparative Examples 1-4 has decreased significantly. Thus, it can be seen that the raw material ratio and preparation method of the water slurry in this application complement each other to form a rheological system with excellent thixotropic properties.

[0055] Test Three The products of Examples 1-7 and Comparative Examples 1-4 were subjected to stability tests. The cold resistance test was carried out at a temperature of -18°C, the heat resistance test was carried out at 50°C, and the cold and heat cycle was carried out in a cycle between -18°C and 50°C. Observation was carried out for one month, and at the same time, the evaluation of appearance changes was carried out. The results are shown in Table 3.

[0056] Table 3 From the above results, it can be seen that the appearance of the products obtained using the formulation of this application has no change after heat resistance, cold resistance, and cold and heat cycles, and the stability is excellent. However, the products of Comparative Examples 1-4 are unstable, with liquid precipitation, and the products are unqualified.

[0057] Test Four The products of Application Examples 1-3 were subjected to relevant performance tests, and the results were recorded in Table 4.

[0058] Viscosity test: Take 100 g of the prepared water slurry and place it in a 150 ml beaker, and place it at a constant temperature of 25°C. Use an NDJ-1F type rotational viscometer to measure the viscosity of the water slurry.

[0059] Line drawing test: Fix the filled eyeliner pen on the line drawing tester, adjust the test eyeliner pen to the same height, set the line drawing speed and paper feeding speed, and start the line drawing tester to carry out the line drawing test, and observe whether the line drawing is smooth.

[0060] Quick drying test: Draw a line with the eyeliner pen on the paper and observe its drying condition after waiting for a few seconds.

[0061] Waterproof and anti-smudging test: Draw a line with the eyeliner pen on the paper, spray the paper with water, and observe whether the line smudges. If the line does not smudge, it indicates good waterproof performance.

[0062] Table 4 Application Example 1 Application Example 2 Application Example 3 Viscosity mPa.s 6.9 7.7 7.4 Line drawing fluency Smooth Smooth Smooth Quick drying Yes Yes Yes Bleeding No bleeding No bleeding No bleeding Waterproof Yes Yes Yes As can be seen from Application Examples 1-4 in combination with Table 4, by using the aqueous slurry of the present application for compounding the color cosmetic composition, the obtained color cosmetic product has excellent performance.

[0063] This specific embodiment is only an explanation of the present application and is not a limitation thereof. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A thixotropic aqueous slurry, characterized in that, Comprising components in the following mass percentages: Inorganic color powder 39 - 72%; Humectant 8 - 20%; Emulsifier 0.5 - 2%; Dispersant 0.2 - 1%; The balance is water; The emulsifier includes one or more of behenic acid, laureth - 9, sorbitan sesquiisostearate, oleth - 20, Tween 60, PEG - 26 / PPG - 30 phosphate, glyceryl stearate, PEG - 100 stearate, ammonium polyacrylate; The dispersant includes one or more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, acrylate copolymer, polyvinylpyrrolidone, polyacrylate, hydrogenated castor oil, polyacrylamide; 2. The thixotropic aqueous slurry according to claim 1, wherein: The emulsifier is a mixture of glyceryl stearate, PEG - 100 stearate, behenic acid and PEG - 26 / PPG - 30 phosphate; 3. The thixotropic aqueous paste according to claim 2, wherein: The mass ratio of glyceryl stearate, PEG - 100 stearate, behenic acid and PEG - 26 / PPG - 30 phosphate is (0.5 - 1):(0.1 - 0.5):1:(0.2 - 1); 4. The thixotropic aqueous slurry according to claim 1, wherein: The dispersant is carboxymethyl cellulose; 5. The thixotropic aqueous paste according to claim 1, wherein: The inorganic color powder includes one or more of titanium dioxide, iron oxide yellow, iron oxide black, iron oxide red, ultramarine blue, chromium green; 6. The thixotropic aqueous slurry according to claim 5, characterized in that: The particle size of the inorganic color powder is micron - level or nano - level; 7. The thixotropic aqueous slurry according to claim 1, wherein: The humectant includes one or more of glycerol, butylene glycol, propylene glycol, polyethylene glycol, hexylene glycol, xylitol, polypropylene glycol, sorbitol, sodium hyaluronate; 8. The preparation method of the thixotropic aqueous slurry according to any one of claims 1-7, characterized in that: Including the following preparation steps: Step 1, heating the emulsifier to melt it into a liquid emulsifier; Step 2, subjecting the dispersant, water and humectant to shear dispersion under heating conditions, and then adding the inorganic color powder for shear dispersion to obtain a mixture; Step 3, shearing and dispersing the liquid emulsifier and the mixture to room temperature, and obtaining a thixotropic aqueous slurry after grinding and dispersion; 9. The preparation method of the thixotropic aqueous slurry according to claim 8, wherein: In Step 1 and Step 2, the heating temperature is 70 - 90°C; 10. Use of a thixotropic aqueous slurry according to any one of claims 1-8, characterized in that, The thixotropic aqueous slurry is used in a color cosmetic composition.

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