Powder cosmetic for improving makeup retention

Abstract

To solve problems for example, as a part of infection spread prevention due to droplet infection in worldwide epidemic of a new model coronavirus infection (COVID-19), wearing of a mask in a public place is required regardless of seasons, and following to increase of opportunities of mask wearing, the number of cosmetic users who are troubled in makeup deterioration and color migration to a mask (secondary adhesion) has increased.SOLUTION: There is provided a powder cosmetic for improving makeup durability comprising: natural mineral having a specific median diameter or synthetic mineral; and spherical composite powder bodies for cosmetic which include as a constituent, water soluble polysaccharide and which comprise environmental compatibility.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a powdered cosmetic containing a spherical composite powder for cosmetics that has high sphericity and soft touch characteristics and is environmentally friendly. By applying makeup secondarily using the powdered cosmetic containing the spherical composite powder for cosmetics on the made-up skin, it is possible to prevent makeup smudging and color transfer (secondary adhesion) to the mask due to wearing a mask and impart soft touch characteristics. Also, even in the case of a rapid change in humidity when putting on and taking off the mask, it is possible to suppress a dry feeling and keep the skin moist.

Background Art

[0002] In response to the worldwide pandemic of coronavirus disease 2019 (COVID-19), wearing masks in public places is required regardless of the season as part of preventing the spread of infection by droplet infection. As the opportunity to wear masks increases, the number of cosmetics users troubled by makeup smudging and color transfer (secondary adhesion) to the mask is increasing.

[0003] The main causes of makeup smudging due to wearing a mask include friction caused by physical contact between the mask and the skin, and stuffiness, sebum secretion, etc. associated with an increase in temperature and humidity inside the mask due to breathing.

[0004] As a conventional technique aimed at preventing makeup smudging and secondary adhesion, a formulation that prevents makeup smudging by applying makeup secondarily has been disclosed. For example, Patent Document 1 discloses an overcoat agent for preventing makeup smudging. By applying the overcoat agent from above after applying eye makeup or the like, a water-resistant film is formed on the makeup surface, thereby improving makeup persistence and secondary adhesion prevention characteristics. However, the invention aims to improve makeup persistence and secondary adhesion prevention characteristics at sites where the amount of sebum secretion is relatively small, such as in eye makeup.

[0005] In addition, Patent Document 2 discloses a spray-type overcoat cosmetic characterized by containing a silicone resin having a specific chemical structure. However, the invention does not assume makeup collapse accompanied by friction due to physical contact when wearing a mask.

[0006] In addition to the method of forming a water-resistant film on the makeup surface as described above, a method of secondarily applying a powdered cosmetic containing porous spherical silica on top of the applied makeup can be considered. This is expected to prevent makeup collapse due to sebum adsorption from the friction reduction due to rolling peculiar to spherical particles and the excellent oil-absorbing properties of porous spherical silica. However, at the same time, it is generally known to cause a feeling of dryness because it also excessively deprives the skin of moisture.

[0007] On the other hand, a method of absorbing excessively secreted sebum with silicone elastomer spherical powder has been disclosed (Patent Document 3). Since the synthetic polymer such as the silicone elastomer has a milder oil-absorbing and moisture-absorbing property compared to porous spherical silica, it can prevent the feeling of dryness after application, and is also excellent in soft touch characteristics due to its elastic deformation characteristics.

[0008] However, in recent years, the adverse effects on the environment and ecosystem associated with the marine outflow of plastic waste have surfaced and attracted worldwide attention (Non-Patent Document 1). In particular, synthetic polymer particles with a particle diameter of 5 mm or less are commonly called plastic microbeads (hereinafter referred to as PMB) and are becoming subject to regulations in various countries.

[0009] Under such circumstances, the development of spherical powder for cosmetics that is environmentally compatible and has a soft touch and can replace conventional PMB is potentially desired. Furthermore, the development of a powdered cosmetic that can prevent makeup collapse due to mask wearing and secondary adhesion to the mask while substantially eliminating PMB is desired.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Patent Document 3

Non-Patent Document

[0011]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0012] In view of the above circumstances, the present invention has been made, and by containing a spherical composite powder for cosmetics having high sphericity and a soft touch, it is an object of the present invention to provide a powdered cosmetic having characteristics of preventing makeup collapse and color transfer (secondary adhesion) to a mask when wearing a mask.

Means for Solving the Problems

[0013] In such a situation, as a result of intensive research by the inventors of the present application to solve the above problems, aggregated particles composed of specific minerals and water-soluble polysaccharides can be used as a spherical composite powder for cosmetics having high sphericity and a soft touch, and a powdered cosmetic containing the spherical composite powder can prevent makeup collapse and color transfer (secondary adhesion) to a mask when applying makeup secondarily on the made-up skin, and can impart soft touch characteristics, thus completing the present invention.

[0014] The present invention provides a powdered cosmetic for improving makeup retention, characterized by containing a spherical composite powder for cosmetics containing a mineral having a specific median diameter and a water-soluble polysaccharide.

Effects of the Invention

[0015] The present invention provides a powder cosmetic for improving makeup retention, which contains a spherical composite powder for cosmetics with high sphericity and a soft feel, and is environmentally friendly. By applying makeup secondarily on the made-up skin using the said powder cosmetic, it is possible to prevent makeup smudging due to wearing a mask and color transfer (secondary adhesion) to the mask, and to impart a soft feel characteristic. Also, even in the case of a rapid humidity change during mask attachment and detachment, it is possible to suppress a dry feeling and maintain moisture on the skin.

Brief Description of the Drawings

[0016]

Figure 1

Modes for Carrying Out the Invention

[0017] Hereinafter, a powder cosmetic for improving makeup retention, which contains a spherical composite powder for cosmetics with high sphericity and a soft feel, and is environmentally friendly according to the present invention, will be described based on its preferred embodiments. According to the present invention, it is possible to obtain a powder cosmetic having characteristics of preventing makeup smudging due to wearing a mask and color transfer (secondary adhesion) to the mask.

[0018] The makeup retention improvement effect of the present invention refers to characteristics of preventing makeup smudging due to wearing a mask and color transfer (secondary adhesion) to the mask.

[0019] The constituent (a) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is a natural mineral or a synthetic mineral having two or more of Si, Al, Mg, and K as constituent elements, and is usually not particularly limited as long as it is a mineral used in cosmetics. For example, talc containing Si and Mg as constituent elements, sericite containing Si, Al, and K as constituent elements, kaolin containing Si and Al as constituent elements, etc. may be mentioned.

[0020] The median diameter of component (a) of component (A) contained in the powder cosmetic for improving makeup retention of the present invention is 0.5 to 2.1 μm. More preferably, it is 0.6 to 1.5 μm. If it is larger than 2.1 μm, the sphericity of the spherical composite powder for cosmetics obtained will decrease. If it is 0.5 μm or more, a spherical composite powder for cosmetics having good sphericity can be obtained.

[0021] The median diameter of component (a) of component (A) contained in the powder cosmetic for improving makeup retention of the present invention can be specified by a general-purpose particle size distribution measuring device. For example, any of the laser diffraction method, light scattering method, and image analysis method may be used. Among these, considering the measurement of the particle size range of the present invention, the laser diffraction method is preferable. Specifically, the median diameter can be measured using Partica LA-950V2 (manufactured by HORIBA, Ltd.) or the like.

[0022] As component (a) of component (A) contained in the powder cosmetic for improving makeup retention of the present invention, commercially available products can be used. For example, Nano Ace D-600 (component: talc, median diameter: 0.6 μm, manufactured by Nippon Talc Co., Ltd.), Nano Ace D-1000F (component: talc, median diameter 1.0 μm: manufactured by Nippon Talc Co., Ltd.), etc. can be used. Further, in order to obtain a mineral having the target median diameter, a mechanical pulverization treatment may be applied to a mineral having a median diameter larger than 2.1 μm and prepared separately.

[0023] As a physical property of the constituent (a) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention, what is more important is the shear viscosity, which is an index of the dispersion state of the constituent (a). The sphericity of the spherical composite powder changes depending on the dispersion state. In the present invention, the shear viscosity (shear rate: 10 / sec) obtained when measuring a 40% by weight aqueous dispersion of the constituent (a) with an E-type viscometer is 100 mPa·s or more. More preferably, it is 1,000 mPa·s or more, and most preferably, it is 10,000 mPa·s or more. In the case of natural minerals or synthetic minerals in which the shear viscosity of the 40% by weight aqueous dispersion is less than 100 mPa·s, the sphericity of the spherical composite powder for cosmetics obtained may decrease. If it is a natural mineral or synthetic mineral in which the shear viscosity of the 40% by weight aqueous dispersion is 100 mPa·s or more, a spherical composite powder for cosmetics with good sphericity can be obtained.

[0024] The shear viscosity of a 40% by weight aqueous dispersion of a natural mineral or synthetic mineral that constitutes the component (A) contained in the powder cosmetic for improving makeup retention of the present invention can be specified as the shear viscosity at a constant shear rate using a general-purpose E-type viscometer. Specifically, the shear viscosity can be measured using Physica MCR 301 (manufactured by Anton Paar).

[0025] Considering the above physical properties, as the constituent (a) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention, more preferably, it is talc or kaolin, and most preferably, it is talc.

[0026] The water-soluble polysaccharide as the constituent (b) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is not particularly limited as long as it is a water-soluble polysaccharide usually used in cosmetics. Specifically, for example, starch, water-soluble cellulose derivatives, and salts thereof can be mentioned. Examples of starch include seed starches such as rice starch, wheat starch, and corn starch, and rhizome starches such as tapioca starch and potato starch. Examples of water-soluble cellulose derivatives and salts thereof include carboxymethyl cellulose and sodium carboxymethyl cellulose.

[0027] As the constituent (b) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention, it is preferably starch. More preferably, it is seed starch, and most preferably rice starch. Since seed starch has lower water swelling property compared to rhizome starch, its aqueous solution viscosity is relatively low and its handleability is good. Among water-soluble polysaccharides, starch is excellent in moisture absorption and water retention functions. Therefore, the powder cosmetic containing the component (A) with starch as the constituent (b) can suppress dryness and maintain moistness even in an environment where rapid humidity changes occur.

[0028] In the complexing step of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention, the concentration of the aqueous dispersion of the constituents (the concentration in water obtained by summing the contents of the constituent (a) and the constituent (b)) is 2 to 40% by weight. More preferably, it is 5 to 20% by weight. If it is greater than 40% by weight, the viscosity of the aqueous dispersion containing the constituent (a) and the constituent (b) becomes high and the handleability deteriorates. If it is less than 2% by weight, the solid content concentration decreases, resulting in a decrease in the yield of the spherical composite powder for cosmetics.

[0029] The median diameter of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is 3 to 30 μm. More preferably, it is 5 to 20 μm. If it is greater than 30 μm, graininess occurs and the soft touch characteristics are inferior.

[0030] The solid content weight ratio (mineral content: water-soluble polysaccharide content) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is 98:2 to 80:20. More preferably, it is 95:5 to 85:15. If the proportion of the water-soluble polysaccharide is greater than 20% by weight, the viscosity of the aqueous dispersion in the complexing step becomes high and the handleability deteriorates. On the other hand, if it is less than 2% by weight, the connecting component between the minerals decreases, resulting in a decrease in the yield of the spherical composite powder for cosmetics.

[0031] Component (A) contained in the powder cosmetic for improving makeup retention of the present invention can be used without treatment, but may also be used after being appropriately surface-treated. The surface treatment agent is not particularly limited as long as it is a surface treatment agent usually used for cosmetic powders. Specific examples of the surface treatment agent include fluorine compounds, silicone compounds, ester compounds, metal soaps, waxes, fats and oils, hydrocarbons, and the like.

[0032] Component (A) contained in the powder cosmetic for improving makeup retention of the present invention is prepared through the following aqueous dispersion preparation steps (1), (2), and complexation step (3). (1) Using a mechanical stirrer, an aqueous solution of a water-soluble polysaccharide is obtained. At this time, in order to dissolve the water-soluble polysaccharide in water, it can be appropriately heated and dissolved. (2) Minerals are added to the aqueous solution of the water-soluble polysaccharide obtained in step (1), and a water dispersion is obtained using a mechanical stirrer. (3) The dispersion obtained in step (2) is fed into a spray dryer, and spherical composite powders for cosmetics composed of minerals and water-soluble polysaccharides are obtained by rapid solidification of fine droplets in a high-temperature field.

[0033] The mechanical stirrer used in production steps (1) and (2) of component (A) contained in the powder cosmetic for improving makeup retention of the present invention is not particularly limited as long as it is a stirrer usually used for dispersion operations in liquids. Examples include a disperser, a homomixer, a high-pressure homogenizer, and the like.

[0034] In production step (2) of component (A) contained in the powder cosmetic for improving makeup retention of the present invention, the viscosity of the aqueous dispersion may be appropriately adjusted using a flocculant such as aluminum sulfate (aluminum sulfate band) or polyaluminum chloride (PAC), or other inorganic salts.

[0035] The spray dryer used in the production process (3) of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is not particularly limited as long as it is a spray dryer usually used for producing granulated bodies. Spray dryers can be broadly classified into a nozzle type and a rotary disk type according to the difference in the spraying mechanism, and a spray dryer equipped with any spraying mechanism can be used.

[0036] In the production of the spherical composite powder for cosmetics having a preferable median diameter in the production of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention, among the above-mentioned spray dryers, it is particularly preferable to use a spray dryer equipped with a two-fluid or more nozzle type or a rotary disk type spraying mechanism.

[0037] The content of the spherical composite powder for cosmetics of the component (A) contained in the powder cosmetic for improving makeup retention of the present invention is 1 to 50% by weight. More preferably, it is 5 to 40% by weight, and most preferably, it is 10 to 30% by weight. If it is less than 1% by weight, the effect of improving makeup retention tends to be inferior, and a sufficient effect of improving makeup retention can be obtained if it is contained at 50% by weight.

[0038] Examples of the powders other than the above contained in the powder cosmetic for improving makeup retention of the present invention include inorganic powders such as talc, sericite, mica, synthetic mica, silica, barium sulfate, alumina, boron nitride, titanium oxide, iron oxide, zinc oxide, etc., and organic powders such as silk powder and crystalline cellulose powder, etc. One or two or more of these can be used. Further, these powders may be surface-treated with a commonly known treatment agent such as a fluorine compound, a silicone compound, a surfactant, a fatty acid, a wax, etc. and then used.

[0039] As other constituent components contained in the powdered cosmetic of the present invention, an oil agent generally used in cosmetics can be contained. Examples of the oil agent include liquid paraffin, squalane, petrolatum, microcrystalline wax, ceresin, cetyl alcohol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, cetyl 2-ethylhexanoate, isotridecyl isononanoate, 2-ethylhexyl palmitate, neopentyl glycol di-2-ethylhexanoate, neopentyl glycol dicaprylate, neopentyl glycol dicaprate, glycerin tri-2-ethylhexanoate, glycerin triisostearate, polyglycerin fatty acid esters, pentaerythritol fatty acid esters, ethylhexyl methoxycinnamate, olive oil, macadamia nut oil, sunflower oil, lanolin, lauric acid, myristic acid, palmitic acid, stearic acid, beeswax, candelilla wax, carnauba wax, linear or cyclic dimethylpolysiloxane, methylphenylpolysiloxane and the like.

[0040] In addition to the above components contained in the powdered cosmetic for improving makeup retention of the present invention, other components generally used in cosmetics may be contained. For example, surfactants, fragrances, medicinal components, cooling agents, ultraviolet absorbers, stabilizers, antioxidants, preservatives, pH adjusters, viscosity adjusters, preservatives, beauty components and the like can be mentioned.

[0041] The powdered cosmetic base material for improving makeup retention of the present invention is prepared by using an apparatus for producing ordinary powdered cosmetics and stirring and mixing the constituent components. Specifically, the powder containing component (A) is uniformly mixed. An oil agent is added to this powder and uniformly dispersed, and then pulverized to obtain a powdered cosmetic.

Examples

[0042] Hereinafter, the present invention will be described in more detail with reference to the particle production examples of component (A) contained in the powder cosmetic for improving makeup retention of the present application, and the examples of the powder cosmetic containing component (A). However, the present invention is not limited thereto. In the table below, the numerical values represent the content (weight %). First, particle production examples of the spherical composite powder for cosmetics, which is component (A) contained in the powder cosmetic for improving makeup retention of the present invention, will be given.

[0043] (Manufacturing method) Particle production examples 1 to 8, particle production comparative example 1 Step (1): Components 8 to 10 (water-soluble polysaccharides) in Table 1 below were added to component 11 (distilled water), and an aqueous solution was prepared using a homomixer (T.K. Robomix; manufactured by Primix Corporation). For the dissolution of components 8 and 9, distilled water preheated to 90°C was used. Step (2): Components 1 to 7 (minerals) in Table 1 below were added to the aqueous solution of the water-soluble polysaccharide obtained in step (1), and a water dispersion of the mineral and the water-soluble polysaccharide was prepared using a homomixer under the following conditions. At this time, the water dispersion concentration was adjusted to 9.2% by weight, and the solid content weight ratio of the mineral and the water-soluble polysaccharide was adjusted to 87:13, respectively. Homomixer rotation speed: 5000 rpm Dispersion treatment time: 30 minutes Step (3): The water dispersion obtained in step (2) was fed to a spray dryer (Model L-12; manufactured by Okawara Chemical Machinery Co., Ltd.) under the following conditions to obtain a spherical composite powder for cosmetics composed of components 1 to 10. Spraying method: Rotating disk Disk rotation speed: 25,000 rpm Water dispersion flow rate: 160 mL / min Supply air temperature: 220°C Exhaust air temperature: 105°C

[0044] (Sphericity evaluation method) Regarding the sphericity of the spherical composite powder for cosmetics in the above particle production examples and particle production comparative examples, when observing with a scanning electron microscope at a magnification of 500 times, under the condition that 100 or more of the composite powders are present in the observation field of view, a composite powder with a circularity of 0.95 or more is regarded as spherical, and the percentage of the number of composite powders recognized as spherical was determined according to the following criteria. (The circularity was calculated by obtaining the projected area and perimeter of the composite powder from image analysis and calculating.) <Judgment Criteria> 〔Percentage of the number of composite powders recognized as spherical〕 〔Judgment〕 75% or more ◎ 50% or more ○ Less than 50% △ Less than 25% ×

[0045] (Softness Evaluation Method) Five professional cosmetic panels in their 20s to 40s were given scores for softness by stretching the spherical composite powder for cosmetics in the above particle production examples and particle production comparative examples on their fingertips or the back of their hands according to the following evaluation criteria. The average score for each spherical composite powder for cosmetics was calculated and determined according to the following criteria. <Evaluation Criteria> 〔Usability〕 〔Score〕 Very good: 5 Good: 4 Average: 3 Slightly poor: 2 Poor: 1 <Judgment Criteria> 〔Average score〕 〔Judgment〕 4.5 or more ◎ 3.5 or more and less than 4.5 ○ 2 or more and less than 3.5 △ Less than 2 ×

[0046]

Table 1

[0047] The shear viscosities (shear rate 10 / sec) of each mineral (talc, sericite, kaolin) used in Particle Production Examples 1 to 3 in Table 1 in a 40 wt% aqueous dispersion were 81,650, 340, and 2,920 mPa·s, respectively.

[0048] Figure 1 shows an electron micrograph of the spherical composite powder for cosmetics obtained in Particle Production Example 1. A spherical composite powder with very high sphericity was obtained.

[0049] As a result of manufacturing spherical composite powders for cosmetics by changing the type of mineral having an equivalent median diameter, good spherical composite powders were obtained in all cases. In particular, a spherical composite powder having the best sphericity was obtained in the system using talc as the mineral (Particle Production Examples 1 to 3).

[0050] As a result of manufacturing spherical composite powders for cosmetics using talc with different median diameters, a spherical composite powder having good sphericity was obtained in the system using talc with a median diameter of 2.1 μm or less. However, the sphericity decreased in the system using talc with a median diameter of 5 μm (Particle Production Examples 1, 6 to 8, Particle Production Comparative Example 1).

[0051] As a result of manufacturing spherical composite powders for cosmetics by changing the type of water-soluble polysaccharide, good spherical composite powders were obtained in all cases. In particular, a spherical composite powder having the best sphericity was obtained in the system using rice starch and carboxymethyl cellulose Na as the water-soluble polysaccharides (Particle Production Examples 1, 4, 5).

[0052] (Manufacturing Method) Particle Production Examples 9 to 14 Step (1): Component 2 in Table 2 below was added to Component 3 preheated to 90°C, and an aqueous solution was prepared using a homomixer (T.K. Robomix; manufactured by Primix Corporation). Step (2): Component 1 in Table 2 below was added to the aqueous solution of Component 2 obtained in Step (1), and a mineral and water-soluble polysaccharide aqueous dispersion was prepared using a homomixer under the following conditions. At this time, the concentration of the aqueous dispersion was adjusted to be 1 to 45% by weight, respectively. Also, the solid content weight ratio of the mineral and the water-soluble polysaccharide was adjusted to be 87:13. Homomixer rotation speed: 5000 rpm Dispersion treatment time: 30 minutes Step (3): The aqueous dispersion obtained in Step (2) was fed to a spray dryer (Model MDL-050B; manufactured by Fujisaki Electric Co., Ltd.) to obtain a spherical composite powder for cosmetics composed of Components 1 and 2. Spraying method: 3-fluid nozzle PN3005 Aqueous dispersion flow rate: 45 mL / min Air supply temperature: 250°C Exhaust temperature: 105°C

[0053]

Table 2

[0054] In Production Examples 9 to 14 of particle production in Table 2, the solid content weight ratio of talc and rice starch was fixed at 87:13, and the production of spherical composite powder for cosmetics was carried out by changing the concentration of the aqueous dispersion. In the systems where the concentration of the aqueous dispersion of the constituent components was 2 to 40% by weight, spherical composite powders having good sphericity and softness were obtained. Particularly, in the systems where the concentration of the aqueous dispersion of the constituent components was 5% and 20% by weight, spherical composite powders having the best sphericity and softness were obtained (Particle Production Examples 9 to 12). In the system where the concentration of the aqueous dispersion of the constituent components was 1% by weight, the yield of the spherical composite powder was lower compared to Particle Production Examples 9 to 12, and the sphericity and softness were also inferior (Particle Production Example 13). Also, in the system where the concentration of the aqueous dispersion of the constituent components was 45% by weight, the yield of the spherical composite powder was high, but the sphericity and softness were inferior compared to Particle Production Examples 9 to 12 (Particle Production Example 14).

[0055] (Manufacturing Method) Particle Manufacturing Examples 15 to 20 Step (1): Component 2 in Table 3 below was added to Component 3 preheated to 90°C, and an aqueous solution was prepared using a homomixer (T.K. Robomix; manufactured by Primix Corporation). Step (2): Component 1 in Table 3 below was added to the aqueous solution of Component 2 obtained in Step (1), and a dispersion of minerals and water-soluble polysaccharides was prepared using a homomixer under the following conditions. At this time, the solid content weight ratio of minerals and water-soluble polysaccharides was adjusted so that it would be 99:1 to 75:25. Also, the dispersion concentration was adjusted to be 9.2% by weight. Homomixer rotation speed: 5000 rpm Dispersion treatment time: 30 minutes Step (3): The dispersion obtained in Step (2) was fed to a spray dryer (Model MDL-050B; manufactured by Fujisaki Electric Co., Ltd.) to obtain a spherical composite powder for cosmetics composed of Components 1 and 2. Spraying method: 4-fluid nozzle SE4003 Dispersion flow rate: 45 mL / min Air supply temperature: 250°C Exhaust temperature: 105°C

[0056] [Table 3]

[0057] In Particle Manufacturing Examples 15 to 20 in Table 3, the dispersion concentration of talc and rice starch was fixed at 9.2% by weight, and the manufacturing of spherical composite powders for cosmetics was carried out by changing the solid content weight ratio. In systems where the solid content weight ratio of the constituent components was 98:2 to 80:20, spherical composite powders with good sphericity and softness were obtained. Particularly, in systems where the solid content weight ratio of the constituent components was 95:5 and 85:15, spherical composite powders with the best sphericity and softness were obtained (Particle Manufacturing Examples 15 to 18). In systems where the solid content weight ratio of the constituent components was 99:1 and 75:25, compared with Particle Manufacturing Examples 15 to 18, the results were inferior in both the sphericity and softness of the spherical composite powders (Particle Manufacturing Examples 19, 20).

[0058] Next, examples of the powder cosmetic for improving makeup retention of the present invention will be given below. The numerical values in the table represent the content (weight %).

[0059]

Table 4

[0060] (Manufacturing method) Examples 1 to 8, Comparative Examples 1 and 2 Components 1 to 6 (powder part) were uniformly mixed in a Henschel mixer and pulverized with an atomizer. Further, the mixed and pulverized product of the powder part, and Components 7 and 8 (oil part) which were previously mixed were added to a Henschel mixer and uniformly mixed. After atomizer pulverization, a powder cosmetic was obtained through a sieve.

[0061] (Evaluation method 1: Makeup retention) Five cosmetic professional panels in their 20s to 40s were applied with the following powder foundation for evaluating makeup retention, and then were asked to use the powder cosmetics of the examples and comparative examples of the present invention. After wearing a mask for 3 hours, the makeup collapse on the cheeks (especially focusing on shininess and peeling of the makeup film) and the absence of secondary adhesion to the mask were comprehensively judged, and scores were given according to the following evaluation criteria. The average score of each powder cosmetic was calculated and judged according to the following judgment criteria. <Evaluation criteria> 〔Makeup retention〕 〔Score〕 Very good: 5 Good: 4 Normal: 3 Somewhat poor: 2 Poor: 1 <Judgment criteria> 〔Average score〕 〔Judgment〕 4.5 or more ◎ 3.5 or more and less than 4.5 ○ 2 or more and less than 3.5 △ Less than 2 ×

[0062] (Evaluation method 2: Feeling of use) Five cosmetics experts in their 20s to 40s were asked to apply the powder foundation for evaluating makeup retention shown below, and then use the powder cosmetics of the examples and comparative examples of the present invention. Regarding the softness when applying to the skin, scores were given according to the following evaluation criteria, and the average score for each powder cosmetic was calculated and judged according to the following judgment criteria. <Evaluation Criteria> 〔Use feeling〕 〔Score〕 Very good: 5 Good: 4 Normal: 3 Somewhat poor: 2 Poor: 1 <Judgment Criteria> 〔Average score〕 〔Judgment〕 4.5 or more ◎ 3.5 or more and less than 4.5 ○ 2 or more and less than 3.5 △ Less than 2 ×

[0063] 〔Powder foundation for evaluating makeup retention〕 Component name Content (wt%) 1. Silicone-treated synthetic mica Remaining amount 2. Silicone-treated sericite 10.00 3. Silicone-treated talc 15.00 4. Silicone-treated pigment-grade titanium oxide 10.00 5. Silicone-treated yellow iron oxide 3.30 6. Silicone-treated safflower 0.40 7. Silicone-treated black iron oxide 0.19 8. Anhydrous silicic acid 5.00 9. Cellulose acetate 5.00 10. Methylparaben 0.20 11. Ethylparaben 0.10 12. Sodium chloride 0.10 13. Dimethicone 2.00 14. Neopentyl glycol diisononanoate 5.00 15. Ethylhexyl methoxycinnamate 4.00 16. (Isostearic acid / behenic acid) (Glyceryl / Polyglyceryl-6) Esters 0.80 17. Tocopherol 0.05 18. Fragrance 0.05 Total 100.00

[0064] (Manufacturing Method) Powder Foundation for Makeup Retention Evaluation Components 1 to 12 (powder part) were uniformly mixed in a Henschel mixer and pulverized with an atomizer. Further, the mixed and pulverized product of the powder part and Components 13 to 18 (oil part) that had been pre-heated and mixed were added to the Henschel mixer and uniformly mixed. After atomizer pulverization, a powder foundation base material for makeup retention evaluation was obtained by passing through a sieve. The base material was filled in a medium dish and compression molded to obtain a powder foundation for makeup retention evaluation.

[0065] Examples 1 to 8 of the present invention were powder cosmetics that prevented makeup collapse due to wearing a mask and secondary adhesion to the mask and had excellent soft touch characteristics.

[0066] In the system that did not contain the spherical composite powder for cosmetics (Component (A)) (Comparative Example 1), the makeup retention was insufficient. In the system where the content of the spherical composite powder for cosmetics (Component (A)) was less than 1% by weight (Example 2), the makeup retention tended to be slightly inferior. In the systems formulated with 10% by weight or more (Examples 1, 5 to 8), the makeup retention and usability were excellent. Among the examples, in the systems where the content of Component (A) was 10 to 30% by weight (Examples 1, 5, 6), there was no sense of dryness particularly when removing the mask, and there was a tendency to feel moist. This is considered to be due to the excellent moisture absorption and water retention functions of the water-soluble polysaccharide, which is rice starch here, as a constituent component of Component (A). From these results, it was confirmed that the effects of the present invention were sufficiently exhibited in powder cosmetics where the content of Component (A) was 10% by weight or more. Also, in powder cosmetics where the content of Component (A) was 10 to 30% by weight, more excellent effects were shown. In the system containing silicic anhydride instead of Component (A), there were additional comments that the usability was insufficient and there was an obvious sense of dryness when removing the mask (Comparative Example 2).

Industrial Applicability

[0067] The present invention provides a powder cosmetic for improving makeup retention, which contains a spherical composite powder for cosmetics with high sphericity and a soft feel, suitable for the environment. By applying makeup secondarily using the powder cosmetic containing the spherical composite powder for cosmetics on the made-up skin, it is possible to prevent makeup smudging due to wearing a mask and color transfer (secondary adhesion) to the mask, and to impart soft feel characteristics. Further, even in the case of a rapid humidity change during mask attachment and detachment, a dry feeling can be suppressed and moisture can be maintained on the skin.

Claims

1. A powder cosmetic for improving makeup retention, containing 10 to 30% by weight of the following component (A) as a constituent component. (A) A spherical composite powder for cosmetics containing the following components (a) and (b) as constituent components (a) Talc having a median diameter of 0.5 to 2.1 μm (b) Water-soluble polysaccharide

2. The powder cosmetic for improving makeup retention according to Claim 1, wherein the constituent component (a) of the component (A) has the following physical properties. The shear viscosity (shear rate 10 / sec) when measuring a 40% by weight aqueous dispersion of the constituent component (a) with an E-type viscometer is 100 mPa·s or more

3. The powder cosmetic for improving makeup retention according to Claim 1 or 2, wherein the constituent component (b) is starch.

4. The powder cosmetic for improving makeup retention according to any one of Claims 1 to 3, wherein the constituent component (b) of the component (A) is seed starch.

5. The powder cosmetic for improving makeup retention according to any one of Claims 1 to 4, wherein the weight ratio of the constituent component (a) to the constituent component (b) of the component (A) is 98:2 to 80:20.

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