Forming process of cosmetic powder cake and cosmetic powder cake

Abstract

The present application discloses a forming process and a cosmetic powder cake. The forming process includes: mixing materials, which includes mixing the raw materials of the cosmetic powder cake to obtain a mixed material; filling, which includes filling the mixed material into a mold at 15-40°C; demolding and drying; By mass, the mixed material includes: 0.02-1 part of an adhesive; 20-65 parts of a powder; 0.5-35 parts of a skin emollient; 0.05-3 parts of an anti-corrosion component; 0.05-4 parts of an emulsifier; 40-80 parts of a solvent; The adhesive includes at least one of polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyl taurate, and acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate cross-linked polymer. The technical solution of the present application can prepare a dense cosmetic powder cake by a normal-temperature filling process. The prepared powder cake is not likely to generate pores on the surface, and has excellent density, drop resistance, better water resistance and sweat resistance, and is not likely to get out of makeup.

Description

Technical Field

[0001] This application belongs to the technical field of cosmetics, and particularly relates to a forming process of a cosmetic powder cake and a cosmetic powder cake. Background Art

[0002] Powder cosmetics can be in the form of loose powder or dense powder cake. Currently, the formulations for making cosmetic powder cakes (especially those with three-dimensional relief patterns on the surface) usually contain thermoreversible polysaccharides (or natural polysaccharides), such as xanthan gum, gellan gum, cellulose and its derivatives, etc. Thermoreversible polysaccharides have the characteristics of dissolving in the aqueous phase when heated and forming a three-dimensional network gel structure after cooling, which can endow the powder cake with a firm texture and prevent the powder from loosening or crumbling. After adding a solvent to the formulation containing thermoreversible polysaccharides and mixing evenly, the mixture is in a gel-like or jelly-like state at room temperature with poor fluidity. It is necessary to heat (usually heated to 50 - 90 °C) to make the mixture thinner and have better fluidity before it can be poured into the mold. After filling, the mixture undergoes steps such as cooling and solidifying, demolding, and drying to finally obtain the cosmetic powder cake.

[0003] Therefore, the formulation using thermoreversible polysaccharides will inevitably go through the processes of heating and filling and cooling and solidifying, and cannot complete the entire preparation process at room temperature. However, the above-mentioned heating and filling and cooling and solidifying processes will affect the quality and performance of the cosmetic powder cake. For example, after the mixture is poured into the mold, as the temperature decreases from high to low, the mixture quickly thickens, resulting in incomplete filling of the parts with sharp angles in the three-dimensional relief pattern and the appearance of pores, which affects the appearance and yield of the product. In addition, in the subsequent demolding and drying steps, the mixture may also experience a freezing environment (such as freeze demolding or freeze drying). During the transition from the high temperature condition of filling to the freezing condition of demolding and drying, the mixture shrinks, resulting in poor drop resistance of the cosmetic powder cake.

[0004] At the same time, a relatively large amount of water-in-oil emulsifier also needs to be added to the above-mentioned formulation of the cosmetic powder cake to make the mixture a stable emulsion system. However, the addition of a relatively large amount of water-in-oil emulsifier results in the fact that the formed cosmetic powder cake product does not have good water resistance, and the user experience presented to consumers is that the product has insufficient makeup holding and sweat resistance and is prone to makeup removal. Summary of the Invention

[0005] To solve the above problems, this application provides a forming process of a cosmetic powder cake and a cosmetic powder cake. The cosmetic powder cake prepared according to the forming process of this application not only has good compactness, excellent drop resistance, a fine relief surface without pores, but also has better water resistance and sweat resistance and is not prone to makeup removal after use.

[0006] The first aspect of this application provides a forming process of a cosmetic powder cake, including:

[0007] Mixing, including mixing the raw materials of the cosmetic powder cake to obtain a mixed material body;

[0008] Filling, including filling the mixed material body into a mold at 15-40°C;

[0009] Demolding and drying to obtain the cosmetic powder cake;

[0010] By mass, the mixed material body includes the following components:

[0011] Binder: 0.02-1 part; powder: 20-65 parts; emollient: 0.5-35 parts; anti-corrosion component: 0.05-3 parts; emulsifier: 0.05-4 parts; solvent: 40-80 parts;

[0012] Among them, the binder includes at least one of polyacrylate crosspolymer-6, sodium polyacryloyldimethyltaurate, and ammonium acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate crosspolymer.

[0013] Without being limited to any theory or explanation, the inventors found that using polyacrylate crosspolymer-6, sodium polyacryloyldimethyltaurate, or ammonium acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate crosspolymer to replace natural polysaccharides can make the mixed material body have good fluidity under the natural ambient temperature conditions of 15-40°C, and filling can be completed without heating; at the same time, it can also endow the powder cake with a firm texture after the material body is dried and formed, preventing the powder from loosening or breaking. Compared with the prior art, the technical solution provided by the present application can realize the preparation of a dense cosmetic powder cake by a normal temperature and normal pressure filling process. According to the molding process of the present application, the temperature of the mixed material body is the same as or close to the ambient temperature, and the mixed material body filled into the mold will not experience the process of the temperature decreasing and the fluidity becoming poor, so there is sufficient time to fill into the three-dimensional relief pattern and discharge the air in the sharp angle part of the pattern, thereby significantly reducing the risk of generating pores, and the prepared cosmetic powder cake can present an excellent fine relief surface. At the same time, filling at the natural ambient temperature also avoids the adverse effect of the different shrinkage rates of each material component on the anti-drop performance of the cosmetic powder cake during the high-temperature cooling process, thereby effectively improving the anti-drop performance of the cosmetic powder cake. In addition, since there is no high-temperature process in the whole preparation process of the cosmetic powder cake, active substances that will be inactivated or partially inactivated at high temperature, such as polypeptide active substances, astaxanthin, vitamin A alcohol, etc., can be added to the cosmetic powder cake, which can improve the designability of the cosmetic powder cake formula.

[0014] Moreover, the inventors also surprisingly found that replacing natural polysaccharides with polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyltaurate or acryloyldimethyltaurine ammonium / behenyl alcohol polyether-2 methacrylate cross-linked polymer can also improve the stability of the emulsion system of the mixed material body. Thus, only a small amount of oil-in-water emulsifier needs to be added to the formula of the cosmetic powder cake to achieve a very stable emulsifying effect. In this way, the cosmetic powder cake can have better water resistance, improve the makeup retention and anti-sweating performance of the cosmetic powder cake, and achieve the effect of not being easily removed.

[0015] In any embodiment of the present application, the binder includes polyacrylate cross-linked polymer-6.

[0016] In any embodiment of the present application, the mass fraction of the emulsifier is less than or equal to 4% of the total mass fraction of the mixed material body; preferably, the mass fraction of the emulsifier is less than or equal to 1% of the total mass fraction of the mixed material body.

[0017] In any embodiment of the present application, the mass percentage content of the solvent in the cosmetic powder cake is less than 5%, preferably less than 1%.

[0018] In any embodiment of the present application, the filling includes filling the mixed material body into a mold under normal pressure at 15~40°C.

[0019] In any embodiment of the present application, demolding and drying include: drying after demolding, or demolding after drying.

[0020] In any embodiment of the present application, drying includes at least one of freeze-drying, microwave drying, heat drying, vacuum drying, and supercritical fluid drying.

[0021] In any embodiment of the present application, before demolding and drying, the molding process further includes precuring and / or predrying.

[0022] In any embodiment of the present application, precuring includes subjecting the filled mixed material body to freeze-curing.

[0023] In any embodiment of the present application, subjecting the filled mixed material body to freeze-curing includes: placing the mixed material body in an environment of -120~0°C to cure the mixed material body.

[0024] In any embodiment of the present application, subjecting the filled mixed material body to freeze-curing includes: placing the mixed material body in a liquid nitrogen tunnel at -120~-70°C to cure the mixed material body.

[0025] In any embodiment of the present application, after placing the mixed material in a liquid nitrogen tunnel at -120 to -70 °C to solidify the mixed material, demolding and drying include: demolding the solidified mixed material, and then subjecting the demolded material to freeze-drying; or subjecting the solidified mixed material to freeze-drying, and then demolding the freeze-dried material.

[0026] In any embodiment of the present application, pre-drying includes the step of removing part of the solvent from the filled mixed material.

[0027] In any embodiment of the present application, the step of removing part of the solvent from the filled mixed material includes one or more of heat drying, microwave drying, vacuum drying, supercritical fluid drying, pressure filtration, and suction.

[0028] In any embodiment of the present application, the powder is selected from at least one of mica, synthetic fluorophlogopite, talc, silica, boron nitride, bismuth oxychloride, barium sulfate, alumina, potassium sodium aluminosilicate, calcium borosilicate, calcium sodium borosilicate, starch and its derivatives, plastic microspheres, and colorants.

[0029] In any embodiment of the present application, the emollient is selected from at least one of animal and vegetable oils and their derivatives, silicone oils, and synthetic oils.

[0030] In any embodiment of the present application, the anti-corrosion component is selected from at least one of phenoxyethanol, parabens, chlorphenesin, potassium sorbate, sodium benzoate, caprylyl glycol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, octanohydroxamic acid, 1,2-pentanediol, glyceryl caprylate, and cymene.

[0031] In any embodiment of the present application, the emulsifier is selected from emulsifiers with a hydrophilic-lipophilic balance (HLB value) greater than 6; the emulsifiers with an HLB value greater than 6 are preferably selected from at least one of Tween 20, Tween 40, Tween 60, Tween 80, PEG-12 polydimethylsiloxane, polyglyceryl-10 myristate, polyglyceryl-10 laurate, and polyglyceryl-10 dioleate.

[0032] In any embodiment of the present application, the solvent is selected from water or a mixture of water and an organic solvent;

[0033] In any embodiment of the present application, the organic solvent is preferably selected from at least one of ethanol, isopropanol, butanol, and polyols.

[0034] In any embodiment of the present application, the mold is made of silica gel, rubber, or metal; optionally, the rubber may include at least one of TPR, TPE, silicone rubber, and natural rubber.

[0035] In any embodiment of the present application, the mold includes at least one chamber with an opening; optionally, the bottom of the chamber has a three-dimensional pattern.

[0036] In any embodiment of the present application, the mixture also includes active substances, which include heat-sensitive active substances and / or heat-insensitive active substances.

[0037] Optionally, the mixture includes heat-sensitive active substances. For example, it may include at least one of heat-sensitive active substances such as polypeptide active substances, astaxanthin, retinol, etc.

[0038] The second aspect of the present application provides a cosmetic powder cake, which is prepared by using the molding process of the cosmetic powder cake in any embodiment of the first aspect. Description of the Drawings

[0039] Figure 1 is a schematic diagram of the water resistance test of the powder of the cosmetic powder cake in Example 1 and Comparative Example 5 of the present application;

[0040] Figure 2 is a graph showing the water resistance test results of the powder of the cosmetic powder cake in Example 1 and Comparative Example 5 of the present application. Detailed Description of the Embodiments

[0041] In order to make the application purpose, technical solution and beneficial technical effects of the present application clearer, the present application will be further described in detail below with reference to the embodiments. It should be understood that the embodiments described in this specification are only for explaining the present application and not for limiting the present application.

[0042] For simplicity, the present application only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly recorded; and any lower limit can be combined with other lower limits to form a range not explicitly recorded. Similarly, any upper limit can be combined with any other upper limit to form a range not explicitly recorded. In addition, although not explicitly recorded, each point or single value between the range endpoints is included in this range. Thus, each point or single value can be used as its own lower limit or upper limit and combined with any other point or single value or combined with other lower limits or upper limits to form a range not explicitly recorded.

[0043] In the description of the present application, it should be noted that unless otherwise specified, "above" and "below" include the recited number, and "multiple" in "one or more" means two or more.

[0044] The above application content of the present application does not intend to describe every disclosed embodiment or every implementation in the present application. The following description more specifically illustrates exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments, which can be used in various combinations. In each instance, the enumeration is only as a representative group and should not be construed as exhaustive.

[0045] As described in the background art, the related technologies all use thermally reversible polysaccharides (or natural polysaccharides) as binders and adopt a forming process of hot filling to prepare cosmetic powder compacts. After the mixed material is poured into the mold, as the temperature decreases from high to low, the mixed material quickly thickens, resulting in incomplete filling of the parts with sharp angles in the three-dimensional relief pattern and the appearance of air holes, which affects the appearance and yield of the product. In addition, in the subsequent demolding and drying steps, the material may also experience a freezing environment (such as freeze demolding or freeze drying). During the transition from the high-temperature condition of filling to the freezing condition of demolding and drying, the material shrinks, resulting in poor drop resistance of the cosmetic powder compact.

[0046] At the same time, the current formula of the cosmetic powder compact contains a relatively large amount of water-in-oil emulsifier, which results in the fact that the formed cosmetic powder compact product does not have good water resistance, and the use feeling presented to consumers is that the product has insufficient makeup holding and sweat resistance and is prone to makeup removal.

[0047] In view of this, through in-depth research and a large number of experiments, the inventors provide a forming process of a cosmetic powder compact and a cosmetic powder compact.

[0048] The first aspect of the present application provides a forming process of a cosmetic powder compact, including steps S10 to S30.

[0049] S10, mixing materials, including mixing the raw materials of the cosmetic powder compact to obtain a mixed material.

[0050] S20, filling, including filling the mixed material into a mold at 15 - 40°C.

[0051] In step S20, 15 - 40°C can represent the temperature of the mixed material. Exemplarily, the temperature of the mixed material can be the same as the ambient temperature. For example, the raw materials of the cosmetic powder compact can be mixed in a natural temperature environment of 15 - 40°C to obtain a mixed material, and then filling is carried out.

[0052] S30, demolding and drying, to obtain a cosmetic powder compact.

[0053] In step S30, the sequence of demolding and drying is not restricted. Demolding can be carried out first and then drying, or drying can be carried out first and then demolding. As long as a cosmetic powder compact with a predetermined shape and a solvent content lower than a preset standard can be obtained.

[0054] In parts by mass, the mixture body comprises the following components:

[0055] Binder: 0.02 to 1 part; powder: 20 to 65 parts; emollient: 0.5 to 35 parts; anti-corrosion component: 0.05 to 3 parts; emulsifier: 0.05 to 4 parts; solvent: 40 to 80 parts.

[0056] The above binder comprises at least one of polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyltaurate, acryloyldimethyltaurine ammonium / montanox 25 methacrylate cross-linked polymer.

[0057] The above anti-corrosion component comprises a preservative, or further comprises an anti-corrosion synergist on the basis of the preservative.

[0058] Without being bound by any theory or explanation, the inventors have found that by using polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyltaurate or acryloyldimethyltaurine ammonium / montanox 25 methacrylate cross-linked polymer to replace natural polysaccharides, the mixture body can have good fluidity under the natural ambient temperature conditions of 15 to 40 °C, and can be filled without heating; at the same time, after the material body is dried and formed, it can also endow the powder cake with a compact texture, preventing the powder from loosening or breaking. Compared with the prior art, the technical solution provided by the present application can realize the preparation of dense powder cakes by a normal temperature and normal pressure filling process. According to the forming process of the present application, the temperature of the mixture body is the same as or close to the ambient temperature, and the mixture body poured into the mold does not experience the process of poor fluidity due to the temperature decreasing from high to low. Therefore, there is sufficient time to fill into the three-dimensional relief pattern and discharge the air in the sharp angle part of the pattern, thereby significantly reducing the risk of generating pores, and the prepared cosmetic powder cake can present an excellent fine relief surface. At the same time, filling at natural ambient temperature also avoids the adverse effect of the different shrinkage rates of each material component on the anti-drop performance of the cosmetic powder cake during the high-temperature cooling process, thereby effectively improving the anti-drop performance of the cosmetic powder cake. In addition, since there is no high-temperature process in the whole preparation process of the cosmetic powder cake, active substances that will be inactivated or partially inactivated at high temperature, such as polypeptide active substances, astaxanthin, retinol, etc., can be added to the cosmetic powder cake, thereby improving the designability of the cosmetic powder cake formula.

[0059] Moreover, the inventors have also surprisingly found that by using polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyltaurate or acryloyldimethyltaurine ammonium / montanox 2 methacrylate cross-linked polymer to replace natural polysaccharides, the stability of the emulsion system of the mixture body can also be improved. Thus, only a small amount of water-in-oil emulsifier needs to be added to the formula of the cosmetic powder cake to have a very stable emulsifying effect. In this way, the cosmetic powder cake can have better water resistance, improve the makeup-holding and anti-sweating performance of the cosmetic powder cake, and achieve the effect of not being easy to take off makeup.

[0060] In some embodiments, the binder may include polyacrylate cross-linked polymer-6.

[0061] Thereby, the fluidity of the mixture body at natural ambient temperature can be improved more significantly.

[0062] In some embodiments, the mass portion of the emulsifier may be less than or equal to 4% of the total mass portion of the mixture body; in other embodiments, the mass portion of the emulsifier may be less than or equal to 1% of the total mass portion of the mixture body. For example, based on the total mass portion of the mixture body being 100%, the dosage of the emulsifier may be 4%, 3.5%, 3%, 2.5%, 2%, 1.5%, 1%, 0.8%, 0.5%, 0.2%, 0.15%, 0.05%, or within the range composed of any two of the above values.

[0063] Thereby, on the premise of maintaining the stability of the emulsion system of the mixture body, the dosage of the emulsifier can be further reduced, thereby further improving the water resistance and sweat resistance of the cosmetic powder cake, and further improving the makeup retention of the cosmetic powder cake.

[0064] In some embodiments, the mass percentage content of the solvent in the cosmetic powder cake is less than 5%.

[0065] In some embodiments, the mass percentage content of the solvent in the cosmetic powder cake is less than 1%.

[0066] In some embodiments, the filling step includes filling the mixture body into a mold at 15-40 °C under normal pressure. Normal pressure can be understood as standard atmospheric pressure (101.325 kPa) or close to standard atmospheric pressure. In this application, normal pressure filling can also be understood as gravity filling, that is, using the self-gravity of the mixture body to make the mixture body flow into the mold without external pressure assistance.

[0067] In some embodiments, demolding and drying may include: first performing demolding, and then performing drying.

[0068] In some other embodiments, demolding and drying may include: first performing drying, and then performing demolding.

[0069] According to the above embodiments, the sequence of demolding and drying is variable. As an example, the mold containing the mixture body can be frozen to form the mixture body, and then demolded and dried to the finished product standard to obtain the cosmetic powder cake. As another example, the mixture body in the mold can be dried to the finished product standard, and then demolded to obtain the cosmetic powder cake. Those skilled in the art can select the appropriate sequence and method of demolding and drying according to actual needs, such as the properties of the mixture body, the requirements for the degree of drying, process conditions, cost, etc., which are not limited herein.

[0070] In some embodiments, drying may include at least one of freeze-drying, microwave drying, heat drying, vacuum drying, and supercritical fluid drying.

[0071] The above-mentioned freeze-drying is a drying method in which a water-containing material is frozen below the freezing point to convert water into ice, and then the ice is converted into steam and removed under a higher vacuum.

[0072] The above-mentioned microwave drying is a drying method that uses electromagnetic waves as a heat source and the material to be dried itself as a heating body.

[0073] The above-mentioned heat drying is a drying method that realizes drying by heating the material.

[0074] The above-mentioned vacuum drying refers to a drying method in which the material is placed under negative pressure conditions and dried by appropriately heating to reach the boiling point under negative pressure or by cooling to solidify the material.

[0075] The above-mentioned supercritical fluid drying is a drying method that uses the high solubility of supercritical solvents to remove the solvents contained in porous solids to achieve drying.

[0076] In this application, one drying method can be selected, or a combination of several drying methods can be selected, as long as the purpose of drying can be achieved, and no limitation is made here.

[0077] In some embodiments, before demolding and drying, the molding process may further include pre-curing and / or pre-drying.

[0078] In some embodiments, pre-curing includes subjecting the filled mixture to freeze-curing.

[0079] In some embodiments, subjecting the filled mixture to freeze-curing may specifically include: placing the mixture in an environment of -120 to 0 °C to solidify the mixture.

[0080] Preferably, in some embodiments, subjecting the filled mixture to freeze-curing may specifically include: placing the mixture in a liquid nitrogen tunnel at -120 to -70 °C for cryogenic freezing treatment to solidify the mixture.

[0081] In some embodiments, after placing the mixture in a liquid nitrogen tunnel at -120 to -70 °C for cryogenic freezing treatment to solidify the mixture, the following demolding and drying steps may be performed: demolding the solidified mixture, and then subjecting the demolded material to freeze-drying; or subjecting the solidified mixture to freeze-drying, and then demolding the freeze-dried material.

[0082] In some embodiments, pre-drying includes the step of removing part of the solvent from the filled mixture.

[0083] In some embodiments, the step of removing part of the solvent from the filled mixture includes one or more of heat drying, microwave drying, vacuum drying, supercritical fluid drying, pressure filtration, and suction.

[0084] In the present application, the powder, emollient, anti-corrosion component, emulsifier, and solvent can all be selected from materials known in the art. Those skilled in the art can select appropriate types of powder, emollient, anti-corrosion component, emulsifier, and solvent according to the needs of the product, and are not limited herein.

[0085] In some embodiments, the powder can be selected from at least one of mica, synthetic fluorophlogopite, talc, silica, boron nitride, bismuth oxychloride, barium sulfate, alumina, potassium sodium aluminosilicate, calcium aluminoborosilicate, calcium sodium borosilicate, starch and its derivatives, plastic microspheres, and colorants.

[0086] In some embodiments, the emollient can be selected from at least one of animal and vegetable oils and their derivatives, silicone oils, and synthetic oils.

[0087] In some embodiments, the anti-corrosion component can be selected from at least one of phenoxyethanol, parabens, chlorphenesin, potassium sorbate, sodium benzoate, caprylyl glycol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, octanohydroxamic acid, 1,2-pentanediol, glyceryl caprylate, and cymene.

[0088] In some embodiments, the emulsifier can be selected from emulsifiers with an HLB value greater than 6.

[0089] Preferably, in some embodiments, the emulsifier with an HLB value greater than 6 can be selected from at least one of Tween 20, Tween 40, Tween 60, Tween 80, PEG-12 polydimethylsiloxane, polyglyceryl-10 myristate, polyglyceryl-10 laurate, and polyglyceryl-10 dioleate.

[0090] In some embodiments, the solvent can be selected from water or a mixture of water and an organic solvent.

[0091] Preferably, in some embodiments, the organic solvent can be selected from at least one of ethanol, isopropanol, butanol, and polyols.

[0092] In some embodiments, the mold can be made of silicone, rubber, or metal.

[0093] In some embodiments, the rubber can include at least one of TPR, TPE, silicone rubber, and natural rubber.

[0094] In some embodiments, the mold may include at least one chamber having an opening.

[0095] In the mold, the chamber can be used to hold the mixture. Specifically, the mold can be placed such that the opening of the chamber faces upward, and the mixture is filled into the chamber through the opening. After pre-curing and / or pre-drying, the mold is demolded, and then further dried, or directly dried after filling, to form a cosmetic powder cake with a specific shape. It can be understood that a mold can include one or more chambers for preparing one or more cosmetic powder cakes. Each chamber has at least one opening for filling and demolding.

[0096] The inner wall of the above-mentioned chamber may or may not have a three-dimensional pattern.

[0097] In some embodiments, the bottom of the chamber may have a three-dimensional pattern. In this way, the cosmetic powder cake product can form a fine relief surface, improving the visual effect of the product.

[0098] In some embodiments, the mixture may further include active substances. The active substances may include heat-sensitive active substances and / or heat-insensitive active substances.

[0099] Since the molding process provided in the present application does not involve a high-temperature process, in some embodiments, the mixture can contain active substances that are sensitive to high temperatures and even inactivated at high temperatures. In some examples, the above-mentioned heat-sensitive active substances may include substances that undergo property changes or lose activity at temperatures above 50°C (e.g., 50°C to 90°C), and these heat-sensitive active substances may include at least one of polypeptide active substances, astaxanthin, and retinol.

[0100] The second aspect of the present application provides a cosmetic powder cake prepared by using the molding process of the cosmetic powder cake in any one of the embodiments of the first aspect.

[0101] The cosmetic powder cake of the present application is prepared by using the molding process of the cosmetic powder cake in any one of the embodiments of the first aspect. Thus, the cosmetic powder cake not only has good compactness, excellent anti-drop performance, and a fine relief surface without pores, but also has better water resistance and sweat resistance, and is not prone to makeup removal after use.

[0102] Examples

[0103] The following examples describe more specifically the disclosure of the present invention. These examples are for illustrative purposes only, as various modifications and variations within the scope of the present invention will be apparent to those skilled in the art. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further treatment, and the instruments used in the examples are all commercially available.

[0104] Example 1

[0105] The cosmetic powder cake of Example 1 was prepared by the following steps (1) to (4).

[0106] (1) Mixing: The raw materials in the formula table shown in Table 1 were mixed at 20 °C to obtain a mixed material. As shown in Table 1, the binder in the raw materials of Example 1 was 0.15 parts by mass of polyacrylate cross-linked polymer - 6, and the oil-in-water emulsifier was 0.15 parts by mass of Tween 60.

[0107] (2) Filling: The mixed material was filled at 20 °C, and the mixed material flowed into the silicone mold by its own gravity without external pressure assistance. The silicone mold had an upward-opening chamber with a three-dimensional pattern on the bottom for forming a three-dimensional relief pattern on the surface of the cosmetic powder cake.

[0108] (3) Demolding: The mixed material in the mold was supercooled and pre-frozen in a liquid nitrogen tunnel at -70 °C for 10 minutes to solidify the mixed material. After the mixed material was solidified, demolding was completed to obtain a mother product.

[0109] (4) Drying: The mother product after demolding was freeze-dried until the mass percentage of the solvent was less than 1% to obtain the cosmetic powder cake.

[0110] Table 1

[0111]

[0112] Example 2

[0113] The cosmetic powder cake of Example 2 was prepared according to the formula shown in Table 2. As shown in Table 2, compared with Example 1, Example 2 still used polyacrylate cross-linked polymer - 6 as the binder, but the mass fraction of polyacrylate cross-linked polymer - 6 was 0.04 parts, and the mass fraction of the oil-in-water emulsifier Tween 60 was 0.5 parts, and the other parts of the raw materials and their contents were also different.

[0114] The preparation steps of the cosmetic powder cake in Example 2 are basically the same as those in Example 1, except that the mixing and filling temperatures in Example 2 are adjusted to 15°C.

[0115] Table 2

[0116]

[0117] Example 3

[0118] Prepare the cosmetic powder cake of Example 3 according to the formula shown in Table 3. As shown in Table 3, compared with Example 1, Example 3 still uses polyacrylate crosspolymer-6 as the binder, but the mass portion of polyacrylate crosspolymer-6 is 0.3 parts, and the mass portion of the oil-in-water emulsifier Tween 60 is 0.05 parts. The other raw materials and their contents are also different.

[0119] The preparation steps of the cosmetic powder cake in Example 3 are basically the same as those in Example 1, except that the mixing and filling temperatures in Example 3 are adjusted to 30°C.

[0120] Table 3

[0121]

[0122] Example 4

[0123] Prepare the cosmetic powder cake of Example 4 according to the formula shown in Table 4. As shown in Table 4, compared with Example 1, Example 4 still uses polyacrylate crosspolymer-6 as the binder, but the mass portion of polyacrylate crosspolymer-6 is 0.8 parts, and the oil-in-water emulsifier is replaced with 0.3 mass parts of PEG-12 dimethicone. The other raw materials and their contents are also different.

[0124] The preparation steps of the cosmetic powder cake in Example 4 are basically the same as those in Example 1, except that the mixing and filling temperatures in Example 4 are adjusted to 40°C.

[0125] Table 4

[0126]

[0127] Example 5

[0128] Prepare the cosmetic powder cake of Example 5 according to the formula shown in Table 5. As shown in Table 5, compared with Example 1, Example 5 uses sodium polyacryloyldimethyltaurate as the binder, and the other raw materials and their contents are the same as those in Example 1.

[0129] The preparation steps of the cosmetic powder cake in Example 5 are also the same as those in Example 1.

[0130] Table 5

[0131]

[0132] Example 6

[0133] Prepare the cosmetic powder cake of Example 6 according to the formulation shown in Table 6. As shown in Table 6, compared with Example 1, ammonium acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate cross-linked polymer is used as the binder in Example 6, and the other raw materials and their contents are the same as those in Example 1.

[0134] The preparation steps of the cosmetic powder cake of Example 6 are also the same as those of Example 1.

[0135] Table 6

[0136]

[0137] Example 7

[0138] The raw materials and their contents used in the cosmetic powder cake of Example 7 are the same as those in Example 1.

[0139] The preparation steps of the cosmetic powder cake of Example 7 are basically the same as those of Example 1, with the only difference being that the freeze-drying in the drying step is replaced by drying at 40 °C.

[0140] Example 8

[0141] The raw materials and their contents used in the cosmetic powder cake of Example 8 are the same as those in Example 1. The preparation steps of Example 8 are basically the same as those of Example 1, with the only difference being that after filling, the mixed material is first dried by microwave to remove part of the moisture, and then the same demolding and drying steps as in Example 1 are carried out.

[0142] Example 9

[0143] Prepare the cosmetic powder cake of Example 9 according to the formulation shown in Table 7. As shown in Table 7, sodium polyacryloyldimethyltaurate is used as the binder in Example 9.

[0144] The preparation steps of the cosmetic powder cake of Example 9 are the same as those of Example 1.

[0145] Table 7

[0146]

[0147] Example 10

[0148] Prepare the cosmetic powder cake of Example 10 according to the formulation shown in Table 8. As shown in Table 8, ammonium acryloyldimethyltaurate / stearyl alcohol polyether-25 methacrylate cross-linked polymer is used as the binder in Example 10.

[0149] The preparation steps of the cosmetic powder cake of Example 10 are the same as those of Example 1.

[0150] Table 8

[0151]

[0152] Example 11

[0153] Prepare the cosmetic powder cake of Example 11 according to the formula shown in Table 9. As shown in Table 9, Example 11 uses sodium polyacryloyldimethyltaurate as the binder.

[0154] The preparation steps of the cosmetic powder cake of Example 11 are basically the same as those of Example 1, except that the temperature of mixing and filling is 30 °C.

[0155] Table 9

[0156]

[0157] Example 12

[0158] Prepare the cosmetic powder cake of Example 12 according to the formula shown in Table 10. As shown in Table 10, Example 12 uses ammonium acryloyldimethyltaurate / steareth-25 methacrylate crosspolymer as the binder.

[0159] The preparation steps of the cosmetic powder cake of Example 12 are basically the same as those of Example 1, except that the temperature of mixing and filling is 35 °C.

[0160] Table 10

[0161]

[0162] Comparative Example 1

[0163] Prepare the cosmetic powder cake of Comparative Example 1 according to the formula shown in Table 11. As shown in Table 11, compared with Example 1, Comparative Example 1 uses thermoreversible polysaccharide gellan gum to replace polyacrylate crosspolymer-6 as the binder, and additionally adds potassium chloride (using thermoreversible polysaccharide and potassium chloride in combination is commonly used in the prior art, which can enhance the colloidal network structure formed by polysaccharide based on ionic crosslinking); correspondingly, the amount of deionized water in Comparative Example 1 is reduced to 42.45 parts by mass. The other raw materials and their contents are the same as those in Example 1.

[0164] The preparation steps of the cosmetic powder cake of Comparative Example 1 are also the same as those of Example 1.

[0165] Table 11

[0166]

[0167] Comparative Example 2

[0168] Prepare the cosmetic powder cake of Comparative Example 2 according to the formula shown in Table 12. As shown in Table 12, compared with Example 4, in Comparative Example 2, thermoreversible polysaccharide carrageenan is used to replace polyacrylate cross-linked polymer-6 as the binder, and potassium chloride used in combination with the thermoreversible polysaccharide is additionally added. Accordingly, the amount of deionized water in Comparative Example 2 is reduced to 47.15 parts by mass. The amounts of other raw materials are the same as those in Example 4.

[0169] The preparation steps of the cosmetic powder cake of Comparative Example 2 are also the same as those of Example 4.

[0170] Table 12

[0171]

[0172] Comparative Example 3

[0173] The formulation composition of Comparative Example 3 is the same as that of Comparative Example 1. The preparation steps of Comparative Example 3 are basically the same as those of Comparative Example 1, except that the mixing and filling of Comparative Example 3 are carried out at 80°C.

[0174] Comparative Example 4

[0175] Prepare the cosmetic powder cake of Comparative Example 4 according to the formula shown in Table 13. As shown in Table 13, the difference in the formulation composition between Comparative Example 4 and Comparative Example 3 is only that the amount of emulsifier Tween 60 is increased to 2.15 parts by mass, and the amount of deionized water is reduced to 40.45 parts by mass. The preparation steps of Comparative Example 4 are the same as those of Comparative Example 3, and the mixing and filling are carried out at 80°C.

[0176] Table 13

[0177]

[0178] Comparative Example 5

[0179] Prepare the cosmetic powder cake of Comparative Example 5 according to the formula shown in Table 14. As shown in Table 14, in the raw materials of Comparative Example 5, thermoreversible polysaccharide gellan gum and potassium chloride used in combination with the thermoreversible polysaccharide are used. Compared with the formulation composition of Comparative Example 4, in the formulation of Comparative Example 5, the amount of emulsifier Tween 60 is further increased to 5 parts by mass, and the amounts of deionized water and squalane are correspondingly reduced.

[0180] The preparation steps of the cosmetic powder cake of Comparative Example 5 are basically the same as those of Comparative Example 3 and Comparative Example 4, and the mixing and filling are carried out at 80°C.

[0181] Table 14

[0182]

[0183] Comparative Example 6

[0184] Prepare the cosmetic powder cake of Comparative Example 6 according to the formulation shown in Table 15. As shown in Table 15, compared with Example 1, Comparative Example 6 uses polyacrylate cross-linked polymer-6 as a binder, and other raw materials and their contents are the same as those in Example 1.

[0185] The preparation steps of the cosmetic powder cake of Comparative Example 6 are also the same as those of Example 1.

[0186] Table 15

[0187]

[0188] Comparative Example 7

[0189] Prepare the cosmetic powder cake of Comparative Example 7 according to the formulation shown in Table 16. As shown in Table 16, compared with Example 1, Comparative Example 7 uses sodium polyacrylate as a binder instead of polyacrylate cross-linked polymer-6, and other raw materials and their contents are the same as those in Example 1.

[0190] The preparation steps of the cosmetic powder cake of Comparative Example 7 are also the same as those of Example 1.

[0191] Table 16

[0192]

[0193] Test part

[0194] (1) Observe the fluidity, gravity filling feasibility and emulsion stability of the mixed material.

[0195] (2) Observe whether there are air holes in the sharp corner part of the three-dimensional relief pattern on the surface of the powder cake.

[0196] (3) Water resistance test of the cosmetic powder cake

[0197] As Figure 1 shown, directly pick up the powder of the cosmetic powder cakes of Example 1 and Comparative Example 5 with fingertips and apply it on the arm. Then rinse it under the faucet for 1 minute, observe the powder residue, and the test results are as Figure 2 shown.

[0198] (4) Antiperspirant test

[0199] Select 30 female volunteers, with an average age of 35±1.5 years old, and provide the cosmetic powder cakes of the above examples and comparative examples for trial use respectively. After 1 hour in a hot and humid environment at 35°C, conduct product antiperspirant scoring. The score is from 1 to 5, and the scoring criteria are as follows:

[0200] 1 point - very dissatisfied with the antiperspirant property; 2 points - dissatisfied with the antiperspirant property; 3 points - consider the antiperspirant property average; 4 points - relatively satisfied with the antiperspirant property; 5 points - very satisfied with the antiperspirant property.

[0201] The average score of the 30 volunteers' scores was used as the anti-sweating rating of the cosmetic powder compacts in each example and comparative example.

[0202] (5)Anti-drop test

[0203] Adjust the rotating screw of the drop test bench to adjust the flat plate to the 30 cm scale; place the powder compact face up at the center position of the test height.

[0204] Conduct the first drop detection: press the button on the test bench to let the powder compact drop onto the hard board tabletop. Pick up the powder compact that has fallen on the tabletop and check whether there are cracks or fractures on the surface of the powder compact. If the powder compact is cracked or fractured, the drop test of this powder compact stops. If the powder compact is normal, then conduct the second drop experiment. The operation steps of the second drop detection are the same as those of the first drop detection. If the powder compact is cracked or fractured, the drop test of this powder compact stops; if the powder compact is normal, then conduct the third drop experiment. The operation steps of the third drop detection are the same as those of the first drop detection.

[0205] The ratio of the number of broken powder compacts in each drop detection to the total number of powder compacts in that drop test is the breakage rate of each drop test. Record the first breakage rate, second breakage rate, and third breakage rate of Examples 1-12 and Comparative Examples 1-7 respectively. The anti-drop rating is based on the sum of the three breakage rates. The rating rules for anti-drop are as follows:

[0206] Table 17

[0207]

[0208] The test results of test items (1), (2), (4), and (5) for each example and comparative example are shown in Table 18.

[0209] Table 18

[0210]

[0211] In Table 18, " / " can indicate that the corresponding test was not conducted. For example, the emulsions of the materials in Comparative Examples 1-4 and Comparative Examples 6-7 were broken, and it was impossible to successfully prepare cosmetic powder compacts with uniform materials. Therefore, the appearance test, anti-sweating test, and anti-drop test of the cosmetic powder compacts were not conducted.

[0212] From the test results in Table 18, it can be found that in the cosmetic powder cake forming processes of Examples 1 to 12, by introducing a specific binder into the formula of the cosmetic powder cake, the mixed material has good fluidity at room temperature, without heating and without external pressure assistance, and can be filled at room temperature and normal pressure. The surface of the prepared powder cake presents a perfect relief, and there are no pores even in the sharp corner parts. The cosmetic powder cakes prepared in Examples 1 to 12 also have good compactness and anti-drop performance. Among them, the amount of the binder used in Examples 2, 9, 11, and 12 is relatively low, thus having a certain impact on the anti-drop property. However, the anti-drop property score of 4 points is still within the acceptable range. In Example 7, heating and drying at 40 °C caused a slight shrinkage of the material in the cosmetic powder cake, but it still maintained good anti-drop performance. The cosmetic powder cakes of the remaining examples did not show the phenomenon of material shrinkage, and the anti-drop property scores were all 5 points, showing excellent anti-drop performance.

[0213] In addition, in Examples 1 to 12, when the dosage of the emulsifier is relatively low, the material can maintain a delicate and uniform state without emulsion breaking, successfully completing the preparation of the cosmetic powder cake and also avoiding the adverse effect of adding too much water-in-oil emulsifier on the water resistance of the cosmetic powder cake. The cosmetic powder cakes prepared in Examples 1 to 12 all show good anti-sweat performance. Among them, the amount of the emulsifier used in Example 12 is slightly higher, resulting in a slight decrease in the anti-sweat property score.

[0214] In contrast, in Comparative Example 1, a thermoreversible polysaccharide gellan gum was used as the binder, and the mixed material was jelly-like at room temperature and could not complete normal pressure filling; moreover, the gellan gum could not improve the stability of the emulsion system of the material. Thus, when the dosage of the emulsifier was the same as that in Example 1, the material in Comparative Example 1 showed emulsion breaking and a uniform and delicate cosmetic powder cake could not be prepared.

[0215] Similarly, in Comparative Example 2, a thermoreversible polysaccharide carrageenan was used as the binder, and the mixed material was jelly-like at room temperature and could not complete normal pressure filling; when the dosage of the emulsifier was the same as that in Example 4, the material in Comparative Example 2 also showed emulsion breaking, and a uniform and delicate cosmetic powder cake could not be prepared either.

[0216] In Comparative Example 3, gellan gum was also used as the binder, the formulation composition was the same as that in Comparative Example 1, and the mixed material was heated to 80 °C. Although the fluidity of the material was significantly improved in the heated state, delamination and emulsion breaking occurred inside the material, and a uniform and delicate cosmetic powder cake still could not be prepared, indicating that the dosage of the emulsifier in the formula was insufficient.

[0217] Compared with Comparative Example 3, the formulation composition of Comparative Example 4 increased the dosage of emulsifier Tween 60 to 2.15 parts by mass. Although the fluidity of the material body was significantly improved in the heated state, delamination and demulsification still occurred inside the material body, and a uniformly textured and delicate cosmetic powder cake could not be prepared, indicating that the dosage of the emulsifier in the formulation was still insufficient.

[0218] On the basis of Comparative Example 4, Comparative Example 5 further increased the dosage of emulsifier Tween 60 to 5 parts by mass. When mixing and filling were carried out at 80 °C, the fluidity of the material body was high, and normal-pressure filling could be successfully completed. Moreover, due to the increased dosage of the emulsifier, a delicate and uniform material body was obtained without demulsification. After heat filling, Comparative Example 5 underwent steps such as freeze demolding and drying, and finally a cosmetic powder cake was prepared. However, due to the characteristics of gellan gum, pores were visible at the sharp angles of the fine relief on the surface of the prepared cosmetic powder cake. In addition, during the transition of the material body from the high-temperature filling condition to the freeze demolding and drying condition in Comparative Example 5, the material body was more prone to shrinkage, resulting in a lower anti-drop score of the cosmetic powder cake than that of Example 1. Furthermore, due to the relatively high content of emulsifier in the cosmetic powder cake formulation of Comparative Example 5, the water resistance and sweat resistance of the prepared cosmetic powder cake were poor. Specifically, as Figure 2 shown, after flushing with water for 1 minute, the powder of Example 1 on the skin surface changed little, while almost all the powder of Comparative Example 5 was washed away by water, indicating that the water resistance of the cosmetic powder cake of Comparative Example 5 was much worse than that of Example 1. From the perspective of the sweat resistance score, the sweat resistance of the cosmetic powder cake of Comparative Example 5 was also much worse than that of Examples 1 to 12. In summary, the technical solution provided by this application can achieve the preparation of a dense cosmetic powder cake by a normal-temperature filling process. The prepared cosmetic powder cake has a surface that is not prone to pores, excellent denseness and anti-drop performance, better water resistance and sweat resistance, and is not prone to makeup removal.

[0219] In Comparative Example 6 and Comparative Example 7, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer and sodium polyacrylate were used to replace polyacrylate cross-linked polymer-6 respectively. Although hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, sodium polyacrylate, polyacrylate cross-linked polymer-6, sodium acryloyldimethyl taurate, and ammonium acryloyldimethyl taurate / behenyl alcohol polyether-25 methacrylate cross-linked polymer in the present application are all polyacrylate derivatives, they all have a cross-linked polymer network in structure and have some functional commonalities in the conventional application in cosmetics. However, due to the differences in their monomer composition, molecular architecture, substituent type, and physical form and other dimensions, they have many different characteristics, such as hydrophilicity, thixotropy, temperature responsiveness, dispersion stability, etc. In Comparative Example 6 and Comparative Example 7, the phenomenon that the fluidity of the mixed material was poor, and it could not be filled under normal temperature and pressure, nor could a stable emulsion system be formed occurred. The above comparison also shows that using at least one of polyacrylate cross-linked polymer-6, sodium acryloyldimethyl taurate, and ammonium acryloyldimethyl taurate / behenyl alcohol polyether-25 methacrylate cross-linked polymer as an adhesive to complete the forming process of the cosmetic powder cake in the present application has achieved unexpected technical effects, rather than being a conventional choice or simple replacement of commonly used raw materials in cosmetics.

[0220] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various equivalent modifications or replacements, and these modifications or replacements should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. For example, a technical solution of adding a small amount of thermoreversible polysaccharide (for example, the addition amount is less than 0.1 wt%) to the raw material composition on the premise of following the inventive concept of the present application and achieving the effects of not affecting normal temperature filling and reducing the dosage of emulsifier should not be excluded from the protection scope of the present application.

Claims

1. A process for forming a cosmetic powder block, characterized in that: include: Mixing, including mixing the raw materials of the cosmetic powder block at 15-40° C. to obtain a mixed material body; Filling, including filling the mixed material into a mold at 15-40° C. and under normal pressure; Demolding and drying to obtain a cosmetic powder block; The mixed material body includes the following components in parts by mass: Adhesive: 0.02~1 part; Powder: 20~65 parts; Emollient: 0.5~35 parts; Preservative component: 0.05~3 parts; Emulsifier: 0.05~4 parts; Solvent: 40~80 parts; Wherein, the adhesive comprises at least one of polyacrylate cross-linked polymer-6, sodium polyacryloyldimethyl taurate, ammonium acryloyldimethyl taurate / behenyl alcohol polyether-25 methacrylate cross-linked polymer; the emulsifier is selected from emulsifiers having a hydrophilic-lipophilic balance value greater than 6; Before the demoulding and drying, the molding process further includes pre-curing, and the pre-curing includes freezing and curing the mixed material body after filling; The demoulding and drying comprises: demoulding the mixed material body, and then freeze-drying the mixed material body.

2. The cosmetic powder block molding process according to claim 1, characterized in that: The adhesive includes polyacrylate crosspolymer-6.

3. The process for forming a cosmetic powder block according to claim 1, characterized in that: The mass fraction of the emulsifier is less than or equal to 4% of the total mass fraction of the mixture.

4. The cosmetic powder block molding process according to claim 1, characterized in that: The mass fraction of the emulsifier is less than or equal to 1% of the total mass fraction of the mixed material.

5. The cosmetic powder block molding process according to claim 1, characterized in that: The mass percentage of the solvent in the cosmetic powder block is less than 5%.

6. The cosmetic powder block molding process according to claim 1, characterized in that: The mass percentage of the solvent in the cosmetic powder block is less than 1%.

7. The cosmetic powder block molding process according to claim 1, characterized in that: The freezing and solidifying of the filled mixed material body comprises: placing the mixed material body in an environment of -120-0°C to solidify the mixed material body.

8. The cosmetic powder block forming process according to claim 7, characterized in that: The freezing and solidifying of the filled mixed material body comprises: placing the mixed material body in a liquid nitrogen tunnel at -120 to -70°C to solidify the mixed material body.

9. The cosmetic powder block molding process according to claim 1, characterized in that: The powder is selected from at least one of mica, talc, silica, boron nitride, bismuth oxychloride, barium sulfate, aluminum oxide, potassium sodium aluminum silicate, calcium aluminum borosilicate, calcium sodium borosilicate, starch and its derivatives, plastic microbeads and colorants; The emollient is selected from at least one of plant and animal fats and their derivatives, silicone oils and synthetic fats; The preservative component is selected from at least one of phenoxyethanol, parabens, chlorphenesin, potassium sorbate, sodium benzoate, caprylyl glycol, p-hydroxyacetophenone, ethylhexylglycerin, 1,2-hexanediol, caprylhydroxamic acid, 1,2-pentanediol, glyceryl caprylate and cymene; The solvent is selected from water or a mixture of water and an organic solvent.

10. The cosmetic powder block molding process according to claim 9, characterized in that: The emulsifier having a hydrophilic-lipophilic balance value greater than 6 is selected from at least one of Tween 20, Tween 40, Tween 60, Tween 80, PEG-12 polydimethylsiloxane, polyglyceryl-10 myristate, polyglyceryl-10 laurate and polyglyceryl-10 dioleate; The organic solvent is selected from at least one of ethanol, isopropanol, butanol and polyols.

11. The cosmetic powder block molding process according to claim 1, characterized in that: The mold is made of silicone, rubber or metal.

12. The cosmetic powder block molding process according to claim 1, characterized in that: The mold includes at least one of TPR, TPE, silicone rubber and natural rubber.

13. The cosmetic powder block molding process according to claim 1, characterized in that: The mold includes at least one cavity having an opening.

14. The cosmetic powder block molding process according to claim 13, characterized in that: The bottom of the chamber has a three-dimensional pattern.

15. The process for forming a cosmetic powder block according to any one of claims 1 to 14, characterized in that: The mixed material body also includes an active substance.

16. The cosmetic powder block molding process according to claim 15, characterized in that: The active substance includes at least one of polypeptide active substances, astaxanthin, and vitamin A alcohol.

17. A cosmetic powder block, characterized in that: The cosmetic powder block is prepared by the molding process of any one of claims 1 to 16.

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