Resin particles and cosmetic preparation

Abstract

To provide resin particles that have excellent shield maintaining properties in a wet state, and that can achieve both transmitting properties and haze.SOLUTION: Resin particles having closed cells inside, the resin particles having a volume-average particle size of 1 μm or more and 30 μm or less, the closed cells having an average long axis length of 0.1 μm or more and 2.0 μm or less, and a porosity due to the closed cells being 1% or more and 40% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to resin particles and cosmetics. [Background technology]

[0002] Patent Document 1 proposes "a composition comprising an aqueous medium, a lipophilic porous powder dispersed in the aqueous medium, an oil component having a viscosity of 100 mPa·s or less, a dispersant for dispersing the lipophilic porous powder in the aqueous medium, and water-holding particles."

[0003] Patent Document 2 proposes "a method for improving the efficiency of light extraction from inside the skin, characterized by applying to the surface of the skin a cosmetic composition containing particles having a particle size in the Mie scattering region." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-218307 [Patent Document 2] Japanese Patent Publication No. 2022-176884 Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide resin particles having internal independent pores, which have excellent shielding properties when wet and can achieve both transparency and haze, compared to resin particles having a volume average particle size of less than 1 μm or more than 30 μm, an average major axis of the independent pores of less than 0.1 μm or more than 2.0 μm, or a porosity due to the independent pores of less than 1% or more than 40%. [Means for solving the problem]

[0006] Means for solving the above problems include the following aspects. <1> Resin particles having independent pores therein, a volume average particle size of 1 μm or more and 30 μm or less, an average major axis of the independent pores of 0.1 μm or more and 2.0 μm or less, and a porosity of the independent pores of 1% or more and 40% or less. <2> Contains biodegradable resin as the main component <1> The resin particles according to claim 1. <3> The biodegradable resin is cellulose. <2> The resin particles according to claim 1. <4> The average major diameter of the closed pores is 0.1 μm or more and 1.5 μm or less. <1> ~ <3> The resin particles according to any one of the above items. <5> The porosity of the independent pores is 1% or more and 20% or less. <1> ~ <4> The resin particles according to any one of the above items. <6> <1> ~ <5> A cosmetic comprising the resin particles according to any one of claims 1 to 4. [Effects of the Invention]

[0007] <1> According to the invention, there is provided resin particles having independent pores therein, which have excellent shielding properties when wet and can achieve both transparency and haze, compared to resin particles having a volume average particle size of less than 1 μm or more than 30 μm, an average long diameter of the independent pores of less than 0.1 μm or more than 2.0 μm, or a porosity due to the independent pores of less than 1% or more than 40%. <2> According to the present invention, resin particles are provided which are superior in biodegradability and shielding properties when wet, as well as achieving both transparency and haze, compared to when a non-biodegradable resin is included as the main component. <3> According to the invention, resin particles are provided which are superior in biodegradability and shielding properties when wet, as well as achieving both transparency and haze, compared to those containing cellulose derivatives. <4> According to the present invention, resin particles are provided which have excellent shielding properties when wet and can achieve both transparency and haze, compared to when the average major axis of the closed pores is less than 0.1 μm or more than 1.5 μm. <5> According to the present invention, resin particles are provided which have excellent shielding properties when wet and can achieve both transparency and haze, compared to when the porosity due to closed pores is less than 1% or more than 20%. <6> According to the invention, a cosmetic product is provided which suppresses color sinking when wet with sebum and has excellent soft focus properties compared to when resin particles are used which have independent pores inside and have a volume average particle size of less than 1 μm or more than 30 μm, an average long diameter of the independent pores of less than 0.1 μm or more than 2.0 μm, or a porosity due to the independent pores of less than 1% or more than 40% are used. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described. These descriptions and examples are intended to illustrate the embodiment and are not intended to limit the scope of the invention. In the present specification, the upper or lower limit of one numerical range may be replaced with the upper or lower limit of another numerical range. In addition, in the present specification, the upper or lower limit of a numerical range may be replaced with a value shown in the examples.

[0009] Each component may contain multiple types of the corresponding substance. When referring to the amount of each component in a composition, if there are multiple substances corresponding to each component in the composition, the amount refers to the total amount of those multiple substances present in the composition, unless otherwise specified.

[0010] <Resin particles> The resin particles according to this embodiment have independent pores therein, a volume average particle size of 1 μm or more and 30 μm or less, an average major axis of the independent pores of 0.1 μm or more and 2.0 μm or less, and a porosity due to the independent pores of 1% or more and 40% or less.

[0011] The resin particles according to this embodiment, due to the above-described configuration, are excellent in maintaining shielding properties when wet, and can achieve both transparency and haze. The reason for this is presumed to be as follows.

[0012] Resin particles are used in a variety of applications. Therefore, various functions are required of the resin particles. One of the functions is to maintain shielding properties when wet, while also achieving transparency and haze.

[0013] For example, cosmetics, which are one application of resin particles, require sebum absorption to prevent makeup from coming off and shielding properties to make wrinkles, pores, etc. To impart these properties, it is common to blend inorganic powders with high refractive indexes (i.e., high shielding power), such as titanium oxide and zinc oxide, into cosmetics. On the other hand, in recent years, there has been an increasing trend towards bare skin, especially among young people, and there is a demand for soft-focus makeup that provides gentle coverage while maintaining a certain degree of skin transparency. There is also a demand for makeup that absorbs sebum but does not cause color fading. These requirements can be met by resin particles that satisfy both the ability to maintain shielding properties when wet and the ability to achieve transparency and haze. That is, by achieving both transparency and haze, soft focus properties that provide gentle shielding properties can be achieved, and by having the ability to maintain shielding properties when wet, gentle shielding properties can be maintained even when sebum is absorbed, and color sinking can be suppressed.

[0014] However, although there are known techniques that do not use inorganic powders with a high refractive index (i.e., high shielding power) but use water-holding particles (e.g., Patent Document 1) and techniques that use particles with a particle size in the Mie scattering region (e.g., Patent Document 2), these techniques do not sufficiently achieve both transmittance and haze while maintaining shielding properties when wet.

[0015] Thus, resin particles are required to be further improved in terms of maintaining shielding properties when wet, while also achieving transparency and haze.

[0016] In contrast, the resin particles according to this embodiment have independent pores inside, and the average major diameter of the independent pores and the porosity due to the independent pores are within the above ranges. The presence of an appropriate amount and size of closed pores inside the particles allows light scattering even when the resin particles are wet, improving the retention of shielding properties when wet. In addition, a blurring effect can be achieved while maintaining transmittance. Furthermore, by setting the volume average particle size of the resin particles within the above range, it becomes easier to achieve both the shielding property when wet, the transparency, and the haze.

[0017] From the above, it is presumed that the resin particles according to this embodiment have excellent shielding properties when wet, and can achieve both transparency and haze. Furthermore, since the resin particles according to this embodiment have the above-described properties, a cosmetic containing the resin particles according to this embodiment suppresses color sinking when wet with sebum and has excellent soft focus properties.

[0018] (Volume average particle size) The volume average particle size of the resin particles according to this embodiment is 1 μm or more and 30 μm or less, more preferably 2 μm or more and 20 μm or less, and even more preferably 3 μm or more and 10 μm or less. If the volume average particle size of the resin particles is less than 1 μm, the porosity due to the closed pores tends to be low, making it difficult to achieve both good shielding properties when wet and low permeability and haze. If the volume average particle size of the resin particles exceeds 30 μm, haze increases, making it difficult to achieve both high transparency and high haze. In particular, when the volume average particle size of the resin particles is within the above range, when the resin particles are used in cosmetics, the cosmetic properties such as feel on the skin become good.

[0019] The volume average particle size of the resin particles is measured as follows. The particle size is measured using an LS particle size distribution analyzer "Beckman Coulter LS13 320 (manufactured by Beckman Coulter)" and the cumulative particle size distribution is plotted from the smallest diameter side on a volume basis. The particle size at 50% of the cumulative distribution is determined as the volume average particle size.

[0020] (Average length of independent pores and porosity due to independent pores) The resin particles according to this embodiment have independent pores inside the particles, where the independent pores are pores closed by partition walls. The average major diameter of the closed pores is 0.1 μm or more and 2.0 μm or less, preferably 0.1 μm or more and 1.5 μm or less, more preferably 0.1 μm or more and 1.0 μm or less, and more preferably 0.2 μm or more. More preferably, it is not less than 0.8 μm. In addition, the porosity of the closed pores is 1% or more and 40% or less, preferably 1% or more and 20% or less, more preferably 1% or more and 15% or less, and even more preferably 3% or more and 10% or less. If the average major axis of the closed pores and the porosity due to the closed pores are low, light scattering due to the closed pores is unlikely to occur, making it difficult to achieve both transparency and haze. If the average major axis of the closed pores and the porosity of the closed pores are large, the permeability increases excessively, making it difficult to achieve both permeability and haze.

[0021] (Area ratio of interconnected holes) From the viewpoint of maintaining shielding properties when wet, the porosity of the resin particles according to this embodiment due to the interconnected pores is preferably low or 0%. Here, the interconnected pores refer to pores that are not closed by partition walls and that communicate with the outside of the resin particle (or the outside of the base particle when a coating layer, described below, is present). Specifically, the porosity of the continuous pores is preferably 0% or more and 10% or less, and more preferably 0% or more and 5% or less.

[0022] (Method for identifying independent pores and interconnected pores, measuring the average long diameter of independent pores, and measuring the porosity due to independent pores and interconnected pores) The methods for identifying the independent pores and the interconnected pores, measuring the average major diameter of the independent pores, and measuring the porosity due to the independent pores and the interconnected pores are as follows. After embedding the resin particles in epoxy resin, the resin particles are cut with a diamond knife or the like to prepare a sample in which the surface having the cross section of the resin particle is used as the observation surface. The prepared sample is set in a scanning electron microscope (SEM), and an SEM image (accelerating voltage: 1.0 kV, magnification: 20,000 times) of the cross section of the resin particle is obtained by photographing it with the scanning electron microscope. In the obtained SEM image, the presence of independent pores surrounded by partitions and continuous pores leading from the resin particle surface (or the mother particle surface if a coating layer, described below, is present) to the interior of the particle is confirmed in the cross section of the resin particle. Next, the obtained SEM image is binarized using image analysis software (for example, ImageJ, WinROOF) by setting a threshold value so that voids and the epoxy resin background can be clearly distinguished. Next, the maximum diameter of the independent pores of each resin particle is measured. This procedure is carried out for 10 resin particles, and the average value of the maximum diameters of the independent pores is calculated as the average major axis.

[0023] Next, the area ratio of all pores to the entire cross section of the resin particle is calculated. On the other hand, the area ratio of independent pores to the entire cross section of the resin particle is calculated. Regarding independent pores, if they can be directly identified, the area ratio may be calculated without binarization. The area ratio of the continuous pores is calculated from the formula: area ratio of continuous pores=area ratio of all pores−area ratio of closed pores. The above operation is then carried out 10 times, and the obtained values ​​are arithmetically averaged.

[0024] The cross-section of the resin particle to be observed is selected from those whose cross-sectional diameter is 85% or more of the volume average particle diameter of the resin particle. Here, the cross-sectional diameter refers to the maximum length (so-called major axis) of a line drawn between any two points on the outline of the cross-section of the resin particle.

[0025] (average circularity) The resin particles according to this embodiment have an average circularity of preferably 0.88 or more, more preferably 0.90 or more, and even more preferably 0.92 or more, from the viewpoints of improving shielding properties when wet and achieving both transparency and haze. In particular, when the resin particles are used in cosmetics, a high average circularity is preferred because it improves the feel on the skin. The average circularity of the resin particles is ideally 1.

[0026] The circularity of a resin particle is calculated by (circular equivalent perimeter) / (perimeter) [(perimeter of a circle having the same projected area as the particle image) / (perimeter of the particle projected image)]. Specifically, this value is measured by the following method. First, the resin particles to be measured are sucked and collected, forming a flat flow, and a still image of the particles is captured by instantaneously activating a strobe light, which is then analyzed using a flow-type particle image analyzer (FPIA-3000 manufactured by Sysmex Corporation).The number of samples taken to determine the circularity is 3,500, and the arithmetic mean is calculated to determine the average circularity.

[0027] (Components of resin particles) The resin particles according to this embodiment contain a resin as a main component. Here, "mainly composed of resin" means that the resin content relative to the resin particles (or mother particles if they have a coating layer as described below) is 90% by mass or more (preferably 95% by mass or more, 98% by mass or more, or 100% by mass).

[0028] From the viewpoint of imparting biodegradability, the resin is preferably a biodegradable resin. A biodegradable resin is a resin that is decomposed into water and carbon dioxide by microorganisms. Specifically, although there is no quantitative definition of the period or decomposition rate of a biodegradable resin, for example, in accordance with JIS K6950:2000 (ISO 14851:1999), a resin that has a biodegradation rate of 60% or more in 60 days is defined as a biodegradable resin.

[0029] Examples of biodegradable resins include cellulose, cellulose derivatives, polyester resins, natural polymers, and polyvinyl alcohol. Among these, cellulose and cellulose derivatives are preferred, and cellulose is more preferred, from the viewpoint of biodegradability.

[0030] -cellulose- The number average molecular weight of the cellulose is preferably 37,000 or more, and more preferably 45,000 or more. The upper limit of the number average molecular weight of the cellulose is not particularly limited, but may be, for example, 100,000 or less.

[0031] The number-average molecular weight of cellulose is measured by gel permeation chromatography (differential refractometer Optilab T-rEX, manufactured by Wyatt Technology; multi-angle light scattering detector DAWN HELEOS II, manufactured by Wyatt Technology; columns TSKgel α-M and α-3000, one each, manufactured by Tosoh Corporation) using dimethylacetamide (with 0.1 M lithium chloride added) as a solvent.

[0032] -Cellulose derivatives- Examples of the cellulose derivatives include cellulose acylate, cellulose ether, hydroxyalkyl cellulose, and carboxymethyl cellulose. Among these, cellulose acylate is preferred as the cellulose derivative, as it is likely to have improved rolling properties, oil absorption properties, and mechanical strength.

[0033] Cellulose acylate is a cellulose derivative in which at least a portion of the hydroxyl groups in cellulose are substituted with acyl groups (acylation). AC (R AC represents a hydrogen atom or a hydrocarbon group.

[0034] Cellulose acylate is, for example, a cellulose derivative represented by the following general formula (CA).

[0035] [ka]

[0036] In the general formula (CA), A 1 , A 2 and A 3each independently represents a hydrogen atom or an acyl group, and n represents an integer of 2 or more. 1 , n A 2 and n A's 3 At least some of the n A's in the molecule represent acyl groups. 1 may be all the same, some of them may be the same, or they may be different from each other. 2 and n A's 3 may be all the same, some may be the same, or different from each other.

[0037] A 1 , A 2 and A 3 The hydrocarbon group in the acyl group represented by may be linear, branched, or cyclic, but is preferably linear or branched, and more preferably linear.

[0038] A 1 , A 2 and A 3 The hydrocarbon group in the acyl group represented by may be a saturated hydrocarbon group or an unsaturated hydrocarbon group, but is more preferably a saturated hydrocarbon group.

[0039] A 1 , A 2 and A 3 The acyl group represented by the formula (I) is preferably an acyl group having a carbon number of 1 to 6. That is, the cellulose acylate is preferably an acyl group having a carbon number of 1 to 6.

[0040] A 1 , A 2 and A 3 The acyl group represented by may be a group in which a hydrogen atom in the acyl group is substituted with a halogen atom (for example, a fluorine atom, a bromine atom, an iodine atom), an oxygen atom, a nitrogen atom, or the like, but is preferably unsubstituted.

[0041] A 1 , A 2 and A 3Examples of the acyl group represented by include a formyl group, an acetyl group, a propionyl group, a butyryl group (butanoyl group), a propenoyl group, a hexanoyl group, etc. Among these, from the viewpoint of improving the biodegradation rate, an acyl group having from 2 to 4 carbon atoms is more preferred, and an acyl group having 2 or 3 carbon atoms is even more preferred.

[0042] Examples of cellulose acylate include cellulose acetate (cellulose monoacetate, cellulose diacetate (DAC), cellulose triacetate), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB).

[0043] The cellulose acylate is preferably cellulose acetate from the viewpoint of improving rolling properties, oil absorbency, and mechanical strength. The cellulose acylate may be used alone or in combination of two or more kinds.

[0044] The weight average degree of polymerization of the cellulose acylate is preferably 200 or more and 1,000 or less, more preferably 500 or more and 1,000 or less, and even more preferably 600 or more and 1,000 or less.

[0045] The weight-average degree of polymerization of cellulose acylate is determined from the weight-average molecular weight (Mw) by the following procedure. First, the weight average molecular weight (Mw) of cellulose acylate is measured in polystyrene equivalent using tetrahydrofuran with a gel permeation chromatography device (GPC device: HLC-8320GPC manufactured by Tosoh Corporation, column: TSKgel α-M). Next, the degree of polymerization of cellulose acylate is calculated by dividing the molecular weight by the molecular weight of the constituent unit of cellulose acylate. For example, when the substituent of cellulose acylate is an acetyl group, the molecular weight of the constituent unit is 263 when the substitution degree is 2.4, and 284 when the substitution degree is 2.9.

[0046] The degree of substitution of cellulose acylate is preferably 0.75 or less, more preferably 0.6 or less, and even more preferably 0.2 or less, from the viewpoint of improving rolling properties, oil absorbency, and mechanical strength.

[0047] The degree of substitution of cellulose acylate is an index showing the degree to which hydroxy groups in cellulose are substituted with acyl groups. In other words, the degree of substitution is an index showing the degree of acylation of cellulose acylate. Specifically, the degree of substitution means the intramolecular average number of hydroxy groups in the D-glucopyranose unit of cellulose acylate that have been substituted with acyl groups. The degree of substitution can be determined by measuring the number of hydroxy groups attributable to cellulose (1030 cm) in an infrared absorption spectrum (Spotlight 400 / PerkinElmer). -1 ) and the peak due to the acyl group (1738 cm -1 ) and is calculated from the absorbance ratio. Specifically, 1738cm -1 absorbance / 1030cm -1 The absorbance value is taken as the degree of substitution.

[0048] -Polyester resin- Examples of polyester resins include aliphatic polyester resins and aliphatic aromatic polyester resins. Examples of aliphatic polyester resins include polylactic acid (PLA), polyglycolic acid (PGA), polyhydroxybutyrate, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), polycaprolactone, polybutylene succinate (PBS), polybutylene succinate / adipate (PBSA), and polyethylene succinate (PBA), among other polyhydroxyalkanoates. Examples of the aliphatic aromatic polyester resin include polybutylene adipate / terephthalate copolymer resin (PBAH) and polytetramethylene adipate / terephthalate copolymer resin.

[0049] -Natural polymer- Examples of natural polymers include starch, cellulose, chitin, chitosan, gluten, gelatin, zein, soy protein, collagen, and keratin.

[0050] -Other ingredients- The resin particles according to this embodiment may contain other components. Examples of other components include plasticizers, flame retardants, compatibilizers, release agents, light resistance agents, weather resistance agents, colorants, pigments, modifiers, anti-drip agents, antistatic agents, hydrolysis inhibitors, fillers, reinforcing agents (glass fiber, carbon fiber, talc, clay, mica, glass flakes, milled glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride, boron nitride, etc.), acid acceptors for preventing acetic acid release (oxides such as magnesium oxide and aluminum oxide; metal hydroxides such as magnesium hydroxide, calcium hydroxide, aluminum hydroxide, and hydrotalcite; calcium carbonate; talc; etc.), and reactive trapping agents (for example, epoxy compounds, acid anhydride compounds, carbodiimides, etc.). The content of each of the other components is preferably 0% by mass or more and 5% by mass or less relative to the total amount of the resin particles (or base particles), where "0% by mass" means that no other components are included.

[0051] (Layer structure of resin particles) The resin particles according to this embodiment may or may not have a coating layer. In other words, the resin particles according to this embodiment may be resin particles having a multi-layer structure including a base particle mainly made of resin and a coating layer that coats the base particle, or may be resin particles having a single-layer structure mainly made of resin. Note that the base particle is the particle on which the coating layer is to be formed. Here, an intermediate layer may be provided between the base particles and the coating layer. In addition, if the resin particles of this embodiment do not require water repellency, it is preferable that they do not have a coating layer, and if the resin particles of this embodiment require water repellency, it is preferable that they have a coating layer, and it is more preferable that they have a coating layer with a coverage rate of 80% or more and 100% or less.

[0052] -Coating layer- The coating layer preferably contains a coating material selected from hydrophobic compounds, specifically, at least one coating material selected from the group consisting of fatty acids, fatty acid metal salts, and amino acid compounds.

[0053] ·fatty acid The fatty acids are linear or branched, saturated or unsaturated fatty acids. The fatty acids may also be mixtures of saturated and unsaturated fatty acids. The fatty acid is preferably a fatty acid having from 14 to 22 carbon atoms (preferably from 14 to 20 carbon atoms). Specific examples of straight-chain fatty acids having from 14 to 22 carbon atoms include behenic acid, arachidic acid, palmitic acid, stearic acid, isostearic acid, distearic acid, and myristic acid.

[0054] Fatty acid metal salts The fatty acid metal salt is a metal salt of a linear or branched, saturated or unsaturated fatty acid. The fatty acid metal salt may be a mixture of a saturated fatty acid metal salt and an unsaturated fatty acid metal salt. From the viewpoint of improving water repellency against high-temperature hot water and maintaining moist feeling, examples of the fatty acid metal salt include metal salts of fatty acids having 14 to 22 carbon atoms (preferably 14 to 20 carbon atoms). Examples of the metal salts of fatty acids having 14 to 22 carbon atoms include metal salts of stearic acid, metal salts of behenic acid, metal salts of palmitic acid, myristic acid, and distearic acid. The metal in the fatty acid metal salt may be a divalent metal. Examples of metals in fatty acid metal salts include magnesium, calcium, aluminum, barium, and zinc.

[0055] Amino acid compounds The amino acid compound refers to an amino acid and an amino acid derivative. Examples of the amino acid compound include lauroyl lysine, lauryl arginine, myristyl leucine, stearoyl glutamic acid, and metal salts thereof.

[0056] The coating material constituting the coating layer is not limited to the above-mentioned coating materials, and examples thereof include lipid compounds (phospholipids, etc.), silicone compounds (dimethylsiloxane, hydrogen dimethicone, etc.), fluorinated compounds (perfluoropolyether, perfluorooctyltriethoxysilane, etc.), and ceramide compounds (hydroxypropyl bispalmitamide MEA, etc.).

[0057] The amount of the coating layer relative to the base particles is preferably 1% by mass or more and 40% by mass or less, more preferably 3% by mass or more and 30% by mass or less, and even more preferably 10% by mass or more and 30% by mass or less. Here, the content of the coating material relative to the entire coating layer is preferably 90% by mass or more and 100% by mass or less, and more preferably 95% by mass or more and 100% by mass or less.

[0058] The coverage of the coating layer with respect to the base particles is preferably 80% or more and 100% or less, and more preferably 90% or more and 100% or less. If the coverage rate of the coating layer is less than 80%, the highly hydrophilic base particles will be exposed in a large area, and the water resistance of the resin particles will decrease.

[0059] The method for measuring the coverage of the coating layer is as follows. The target resin particles are stained with ruthenium. When observed under a scanning electron microscope (SEM), the coating layer appears black due to the ruthenium staining. The ruthenium-stained cellulose particles are observed under an SEM at a magnification of 3500 times, and the ratio of the area of ​​the observed black coating layer to the area of ​​one observed resin particle is calculated. This operation is carried out for 50 resin particles, and the arithmetic mean value of the area ratio of the resulting coating layer is calculated, which is taken as the coverage rate of the coating layer.

[0060] -Middle class- The intermediate layer preferably contains at least one intermediate material selected from the group consisting of polyamine compounds, polyquaterniums, polysaccharide compounds, and polyacrylic acids. By providing an intermediate layer between the base particles and the coating layer, peeling of the coating layer is suppressed.

[0061] Polyamine compounds are a general term for aliphatic hydrocarbons having two or more primary amino groups. Examples of the polyamine compound include polyalkyleneimine, polyallylamine, polyvinylamine, and polylysine. From the viewpoint of improving biodegradability, the polyalkyleneimine is preferably a polyalkyleneimine having a structural unit with an alkylene group having 1 to 6 carbon atoms (preferably 1 to 4 carbon atoms, more preferably 1 to 2 carbon atoms), and more preferably polyethyleneimine. Examples of polyallylamine include homopolymers and copolymers of allylamine, allylamine amide sulfate, diallylamine, dimethylallylamine, and the like. The polyvinylamine is produced, for example, by hydrolyzing poly(N-vinylformamide) with an alkali, and specific examples thereof include "PVAM-0595B" manufactured by Mitsubishi Chemical Corporation. The polylysine may be extracted from a natural product, may be produced by a transformed microorganism, or may be chemically synthesized.

[0062] Examples of polyquaterniums include polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-51, polyquaternium-61, and polyquaternium-64. The content of the polyquaternium is preferably 0.2% by mass or more and 2% by mass or less based on the total mass of the base particles.

[0063] Examples of polysaccharide compounds include chitin, chitosan, and carboxymethylcellulose. Other examples of polysaccharide compounds include polysaccharides containing sulfate or phosphate, polysaccharides containing uronic acids (e.g., glucuronic acid, iduronic acid, galacturonic acid, and mannuronic acid), and polysaccharides containing both of these acid structures. Specific examples of polysaccharides include hyaluronic acid, gellan gum, deacylated gellan gum (DAG), rhamsan gum, diutan gum, xanthan gum, carrageenan, xanthan gum, hexuronic acid, fucoidan, pectin, pectic acid, pectinic acid, heparan sulfate, heparin, heparin sulfate, keratosulfate, chondroitin sulfate, dermatan sulfate, rhamnan sulfate, and alginic acid. The intermediate material used in the intermediate layer is preferably a polysaccharide compound, more preferably chitosan.

[0064] The amount of the intermediate layer coated on the base particles is preferably 0.1% by mass or more and 20% by mass or less, and more preferably 0.2% by mass or more and 2% by mass or less. Here, the content of the intermediate material relative to the entire intermediate layer is preferably 90% by mass or more and 100% by mass or less, and more preferably 95% by mass or more and 100% by mass or less.

[0065] The ratio of the coating amount of the coating layer to the coating amount of the intermediate layer (ie, ratio = coating amount of the coating layer / coating amount of the intermediate layer) is preferably 0.05 or more and 400 or less, more preferably 1.5 or more and 150 or less, and even more preferably 5 or more and 150 or less.

[0066] (external additives) The resin particles according to this embodiment may contain inorganic particles as an external additive, which inhibits secondary aggregation of the particles, thereby allowing the particles to exhibit their inherent properties.

[0067] The external additive may be, for example, at least one selected from the group consisting of silicon-containing compound particles and metal oxide particles.

[0068] The silicon-containing compound particles refer to particles containing silicon. The silicon-containing compound particles may be particles containing only silicon, or particles containing silicon and other elements.

[0069] The silicon-containing compound particles are preferably silica particles. The silica particles may be crystalline or amorphous as long as they are particles containing silica, i.e., SiO2, as the main component. The silica particles may be particles produced from silicon compounds such as water glass or alkoxysilane, or may be particles obtained by pulverizing quartz. As the metal oxide, oxides of metals other than silicon can be used. Examples of metal oxides include zinc oxide, magnesium oxide, iron oxide, and aluminum oxide.

[0070] The volume average particle size of the external additive is preferably 1 nm or more and 100 nm or less, and more preferably 5 nm or more and 30 nm or less. The volume average particle size of the external additive is measured in the same manner as the volume average particle size of the resin particles.

[0071] The amount of the external additive added is preferably 0.1% by mass or more and 2% by mass or less with respect to the total mass of the resin particles (resin particles to which no external additive has been added).

[0072] <Method of manufacturing resin particles> The method for producing the resin particles according to this embodiment is not particularly limited. As a specific example, when obtaining resin particles having cellulose as the main component, the method for producing resin particles according to this embodiment includes, for example, a step of granulating cellulose acylate particles (hereinafter referred to as the granulation step) and a step of saponifying the cellulose acylate particles (hereinafter referred to as the saponification step).

[0073] -Granulation process- (1) First, cellulose acylate is dissolved in a water-soluble organic solvent A to prepare a cellulose acylate solution A. (2) Next, the cellulose acylate solution A is added to a calcium carbonate dispersion in which calcium carbonate and a water-soluble inorganic salt are dispersed in water, and the mixture is stirred to prepare a cellulose acylate solution B. (3) Next, the cellulose acylate solution B is added to a mixed solution of carboxymethyl cellulose, the water-soluble organic solvent B, and water, and the mixture is stirred to prepare the cellulose acylate solution C. (4) Next, the cellulose acylate solution C is heated to remove the water-soluble organic solvents A and B, and sodium hydroxide and hydrochloric acid are added to form cellulose acylate particles. The cellulose acylate particles are then filtered out and dispersed in water to prepare a cellulose acylate particle dispersion D.

[0074] Here, the water-soluble organic solvents A and B are solvents in which water dissolves at 25° C. in an amount of 0.1% by mass to 10% by mass, and examples thereof include ethyl acetate, butyl acetate, methyl ethyl ketone, and acetone. The water-soluble inorganic salt is preferably one that is soluble in water at 20°C by 9% or more, and particularly preferably one that is soluble in water at 15% or more. Examples of water-soluble inorganic salts include sodium chloride, potassium chloride, lithium chloride, ammonium chloride, calcium chloride, magnesium chloride, sodium sulfate, potassium sulfate, ammonium sulfate, magnesium sulfate, sodium hydrogen sulfate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate, magnesium nitrate, sodium carbonate, potassium carbonate, ammonium carbonate, and sodium hydrogen carbonate. Sodium salts, potassium salts, and magnesium salts are preferred, and sodium chloride, potassium chloride, magnesium chloride, sodium sulfate, potassium sulfate, and magnesium sulfate are particularly preferred. The concentration of the water-soluble inorganic salt in the calcium carbonate dispersion is preferably 0.5% by mass to 20% by mass, particularly preferably 1% by mass to 10% by mass, based on the dispersion. If the concentration is too low, it is difficult to form closed pores, and if the concentration is too high, it is difficult to obtain a good dispersion when cellulose acylate solution A is mixed with the calcium carbonate dispersion.

[0075] -Saponification process- (5) Next, sodium hydroxide is added to the cellulose acylate particle dispersion D, and the cellulose acylate particle dispersion D is heated and stirred in a weak alkaline environment to saponify the cellulose acylate particles, thereby preparing a cellulose particle suspension. (6) Next, hydrochloric acid is added to the cellulose particle suspension to adjust the pH of the suspension to near neutral (for example, in the range of 6.5 to 7), after which the cellulose particles are filtered and washed with an organic solvent. Thereafter, the cellulose particles are filtered and washed with pure water repeatedly. After the electrical conductivity of the filtrate reaches 10 μs / cm or less, the filtered cellulose particles are dried.

[0076] Through the above steps, resin particles containing cellulose as the main component are obtained. In the method for producing resin particles, cellulose acylate solution B is added to a mixed solution of carboxymethyl cellulose, water-soluble organic solvent B, and water, and the mixture is stirred to form oil droplets containing cellulose acylate, and water droplets are encapsulated inside the oil droplets. As a result, water droplets are encapsulated inside the formed cellulose acylate particles. By drying the cellulose acylate particles, the water inside the particles evaporates, and closed pores are formed inside the resulting resin particles. The average long diameter of the independent pores and the porosity due to the independent pores can be controlled by mechanical conditions such as the type of solvent, the concentration of cellulose acylate solution A, the salt concentration of cellulose acylate solution B, the viscosity of cellulose acylate solution B, the interfacial tension between the oil phase and the water phase, and the stirring when preparing cellulose acylate solution C. To obtain resin particles having a volume average particle size within the above range, for example, the type of solvent in the cellulose acylate solution A and the concentration of cellulose acylate are adjusted.

[0077] In addition, when resin particles containing cellulose acylate as a main component are obtained, examples of the method include a method of obtaining cellulose acylate particles in a granulation step without carrying out a saponification step, a method of reducing the amount of sodium hydroxide in the saponification step to lower the degree of saponification, etc. By reducing the amount of sodium hydroxide in the saponification step, the substitution degree of cellulose acylate can be adjusted.

[0078] - Intermediate layer forming process and coating layer forming process - In the method for producing resin particles according to the present embodiment, when resin particles having a coating layer and an intermediate layer are obtained, the method includes a saponification step, an intermediate layer forming step, and a coating layer forming step.

[0079] First, an aqueous dispersion is prepared in which the resin particles obtained through the saponification step (hereinafter referred to as "mother particles") are dispersed. Before preparing the aqueous dispersion, it is preferable to wash the mother particles with an acid.

[0080] Next, the aqueous dispersion containing the base particles is mixed with an aqueous solution containing the intermediate material that will form the intermediate layer. This causes, for example, the hydroxyl groups of the cellulose in the base particles to react with the carboxyl groups, amino groups, etc. of the intermediate material that will form the intermediate layer, or the hydroxyl groups to form hydrogen bonds, thereby forming the intermediate layer. However, if no intermediate layer is to be formed, this step is not performed.

[0081] After heating the aqueous dispersion in which the base particles on which the intermediate layer has been formed are dispersed, the coating material that will form the coating layer is added and stirred, thereby forming the coating layer. When forming the coating layer, the coverage of the coating layer is controlled by the heating temperature, the amount of coating material added, the time for adding the coating material, and the stirring time after adding the coating material.

[0082] The resin particles having a coating layer are then extracted from the mixed solution. The extraction of the resin particles having a coating layer is carried out, for example, by filtering the mixed solution. The extracted resin particles having a coating layer are preferably washed with water. This allows the unreacted coating material to be removed. The resin particles having a coating layer are then dried to obtain the resin particles according to this embodiment.

[0083] -External addition process- An external additive may be added to the obtained resin particles. The external addition step may be, for example, a process of adding an external additive to cellulose particles using a mixing mill, a V-type blender, a Henschel mixer, a Loedige mixer, or the like.

[0084] <Application> Applications of the resin particles according to this embodiment include granular materials such as cosmetics, paints, rolling agents, abrasives, scrubbing agents, display spacers, materials for forming beads, light diffusing particles, resin reinforcing agents, refractive index control agents, biodegradation accelerators, fertilizers, water-absorbing particles, toner particles, and anti-blocking particles.

[0085] <Cosmetics> The cosmetic product according to this embodiment is a cosmetic product containing the resin particles according to this embodiment, and examples thereof include skin cleansers or cosmetics described in JP-A No. 2014-221743 or JP-A No. 2023-150333.

[0086] The dosage form or shape of the cosmetic product according to this embodiment is not particularly limited, and examples include powder, liquid, solid, and the like. The cosmetic product according to this embodiment may be any of aqueous, oily, water-in-oil emulsion, oil-in-water emulsion, non-aqueous emulsion, W / O / W type multiple emulsion, O / W / O type multiple emulsion, etc. The main formulation forms of the cosmetic product according to this embodiment include liquid, cream, aerosol, ointment, emulsified solid, stick, emulsified stick, and the like.

[0087] The uses of the cosmetic product according to this embodiment are also not particularly limited, and examples thereof include skin care cosmetics, hair cosmetics, makeup cosmetics, UV protection cosmetics, antiperspirants, cleansers, and the like. Examples of skin care cosmetics include lotions, emulsions, creams, cleansers, oil liquids, hand creams, lip creams, and wrinkle concealing skin care cosmetics. Hair cosmetics include shampoos, rinses, treatments, hair creams, cuticle coats, setting agents, and the like. Examples of makeup cosmetics include makeup base, concealer, face powder, powder foundation, liquid foundation, cream foundation, oil-based foundation, rouge, eye shadow, mascara, eyeliner, eyebrow pencil, lipstick, nail products, and the like. Examples of UV protective cosmetics include sunscreen oil, sunscreen emulsion, sunscreen cream, sunscreen lotion, and sunscreen. In particular, the cosmetic product according to this embodiment is preferably a makeup cosmetic product, since it inhibits color sinking when wet with sebum and has excellent soft focus properties.

[0088] When the cellulose particles according to this embodiment are blended into a cosmetic product, the blending amount is not particularly limited, and the cellulose particles according to this embodiment are blended, for example, in an amount of 0.01% by mass or more but less than 100% by mass relative to the cosmetic product. The formulation, use, optional ingredient blending, and amount of optional ingredient blended in the cosmetic product are not particularly limited, and known optional ingredients can be appropriately selected. The optional ingredients are listed below. Each can be used alone or in combination of two or more.

[0089] (1) UV absorbers The ultraviolet absorber is not particularly limited as long as it is a raw material that can be normally incorporated into cosmetics. Specifically, these include oxybenzone-1 (label name (INCI: Benzophenone-1)), oxybenzone-2 (label name (INCI: Benzophenone-2)), oxybenzone-3 (label name (INCI: Benzophenone-3)), oxybenzone-4 (label name (INCI: Benzophenone-4)), oxybenzone-5 (label name (INCI: Benzophenone-5)), oxybenzone-6 (label name (INCI: Benzophenone-6)), oxybenzone-9 (label name (INCI: Benzophenone-9)), homosalate, octocrylene, t-butyl methoxydibenzoylmethane, ethylhexyl salicylate, diethylaminohydroxybenzoyl hexyl benzoate, polysilicone-15, dimethoxybenzylidene dioxoimidazolidine octyl propionate (label name (INCI: Benzophenone-9)), :EthylhexylDimethoxybenzylideneDioxoimidazolidinePropionate), TerephthalylideneDicamphorSulfonic Acid (Label Name: (INCI:TerephthalylideneDicamphorSulfonic Acid)), Ethylhexyl Triazone, Bis(trimethylsiloxy)silylisopentyl Methyl Trimethoxycinnamate (Label Name: (INCI:IsopentylTrimethoxycinnamateTrisiloxane)), Drometrizole Trisiloxane, Ethylhexyl Dimethyl PABA (Label Name: (INCI:Ethylhexyl DimethylPABA)), Isopropyl Paramethoxycinnamate (Label Name: (INCI:IsopropylMethoxycinnamate)), Ethylhexyl Methoxycinnamate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Phenylbenzimidazole Sulfonic Acid (Label Name: (INCI:Phenylbenzimidazole) Sulfonic Acid), Methylenebisbenzotriazolyltetramethylbutylphenol, Ethyl dimethoxycinnamate hexanoate glyceryl (Indication name (INCI: GlycerylEthylhexanoate)Dimethoxycinnamate), glyceryl PABA, methyl diisopropylcinnamate (label name (INCI: DiisopropylMethylCinnamate)), cinoxate, and ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate (label name (INCI: Ethylhexyl Dimethoxybenzylidene Dioxoimidazolidine Propionate)).

[0090] (2) Oil The oil may be solid, semi-solid, or liquid, and examples of oils that can be used include natural animal and vegetable oils and semi-synthetic oils, hydrocarbon oils, higher fatty acids, higher alcohols, esters, silicone oils, and fluorine-based oils.

[0091] Natural animal and vegetable oils and semi-synthetic oils Natural animal and vegetable oils and semi-synthetic oils, アボカド oil (indicated name (INCI: Persea Gratissima (Avocado) Oil)), アマニ oil (indicated name (INCI: Linum Usitatissimum (Linseed) Seed Oil)), アーモンド oil (indicated name (INCI: Prunus Amygdalus Dulcis (Sweet Almond) Oil)), エゴマoil, オリーブoil (indicated name (INCI: Olea Europaea (Olive) Fruit) Oil)), アメリカガヤ oil (indicated name (INCI:Torreya Californica(California) Nutmeg Oil), Koushiga Oil (INCI: Cymbopogon Nardus (Citronella) Oil), Kaya Seed Oil (INCI: Torreya Nucifera Seed Oil), Kiownin Oil (INCI: Kyounin Yu), Komugi Germ Oil (INCI: Triticum Vulgare (Wheat) Germ Oil), Goma Oil (INCI: Sesamum Indicum (Sesame) Seed Oil), Komugi Germ Oil (INCI: Triticum Vulgare (Wheat) Germ Oil), Kome Germ Oil (INCI: Oryza Sativa (Rice) Germ Oil Oil), Comed Oil (INCI: Oryza Sativa (Rice) Bran Oil), Sazan Oil (INCI: Camellia Kissi Seed Oil), Saffron Oil (INCI: Carthamus Tinctorius (Safflower) Seed Oil), Daizu Oil (INCI: Glycine Soja (Soybean) Oil), Chiya Oil (INCI: Camellia Sinensis Seed Oil), Tsubaki Oil (INCI: Camellia Japonica Seed Oil), Evening Primrose Oil (INCI: Oenothera Biennis (Evening Primrose) Oil), Natanes Oil (INCI: Rape ShushiYU)), Toumolokoshi Germ Oil (INCI: Zea Mays (Corn) Germ Oil), Komugi Germ Oil (INCI: Triticum Vulgare (Wheat) Germ Oil), etc. Germ Oil, Parsik Oil (INCI: Elaeis Guineensis (Palm) Oil), Parsik Kernel Oil (INCI: Elaeis Guineensis (Palm) Kernel Oil), Himasi Oil (INCI: Ricinus Communis (Castor) Seed Oil), Himasi Oil (INCI: Helianthus Annuus (Sunflower) Seed Oil), Budo Seed Oil (INCI: Vitis Vinifera) Vinifera (Grape) Seed Oil), Hohoba Seed Oil (INCI: Simmondsia Chinensis (Jojoba) Seed Oil), Macadamia Seed Oil (INCI: Macadamia Ternifolia Seed Oil), Medowfoam Oil (INCI: Limnanthes Alba (Meadowfoam) Seed Oil), Mianyang Oil (INCI: Gossypium Herbaceum (Cotton) Seed Oil), Yashi Oil (INCI: Cocos Nucifera (Coconut) Oil), Pinot Oil (INCI: Arachis Hypogaea(Peanut)Oil)) などのnatural vegetable oil, サメliver oil (indicated name (INCI: Shark Liver Oil)), タラ liver oil (indicated name (INCI: Cod Liver Oil)), cod liver oil (indicated name (INCI: Fish Liver) Oil)), タートル oil (indicated name (INCI: TurtleOil)), ミンク oil (indicated name (INCI: Mink Oil)), egg oil (indicated name (INCI: Egg Oil)) natural animal oil, water added ヤシ oil (indicated name (INCI: Hydrogenated Coconut) Oil)), liquid ラノリン (indicated name (INCI: Lanolin Oil)) and other semi-synthetic oils and greases.

[0092] ·Carbonized Hydrogen Oil Examples of suitable alkanes include olefin oligomers, isoparaffins such as (C13,14) isoparaffin, isododecane, undecane, dodecane, isohexadecane, hydrogenated polyisobutene (display name (INCI: Hydrogenated Polyisobutene)), squalane (INCI), mineral oil, coconut alkanes, (C13-15) alkanes, and petrolatum (display name (INCI: Petrolatum)).

[0093] ·Higher fatty acids Examples of higher fatty acids include oleic acid (labeled as "Oleic Acid" in Inc.), linoleic acid (labeled as "Linoleic Acid" in Inc.), linolenic acid (labeled as "Linolenic Acid" in Inc.), arachidonic acid (labeled as "Arachidonic Acid" in Inc.), eicosapentaenoic acid (labeled as "Eicosapentaenoic Acid" in Inc.), docosahexaenoic acid (labeled as "Docosahexaenoic Acid" in Inc.), isostearic acid (labeled as "Isostearic Acid" in Inc.), and hydroxystearic acid (labeled as "Hydroxystearic Acid" in Inc.).

[0094] Higher alcohols Examples of higher alcohols include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, oleyl alcohol, isostearyl alcohol, octyldodecanol, cholesterol, phytosterols, and batyl alcohol.

[0095] Ester oil Examples of ester oils include n-alkyl glycol monoisostearates such as diisobutyl adipate (label name (INCI: Diisobutyl Adipate)), dihexyldecyl adipate (label name (INCI: Diheptylundecyl Adipate)), and isostearyl isostearate (label name (INCI: Isostearyl Isostearate)), isocetyl isostearate (label name (INCI: Isocetyl Isostearate)), trimethylolpropane triisostearate (label name (INCI: Trimethylolpropane Triisostearate)), glycol diethylhexanoate (label name (INCI: Glycol Diethylhexanoate)), cetyl ethylhexanoate (label name (INCI: Cetyl Ethylhexanoate)), and trimethylolpropane triethylhexanoate (label name (INCI: Trimethylolpropane Triethylhexanoate), pentaerythrityl tetraethylhexanoate (label name (INCI: Pentaerythrityl Tetraethylhexanoate)), cetyl octanoate (label name (INCI: Cetyl Ethylhexanoate)), octyldodecyl esters such as octyldodecyl stearoyloxystearate (label name (INCI: Octyldodecyl Stearoyl Stearate)), oleyl oleate (label name (INCI: Oleyl Oleate)), octyldodecyl oleate (label name (INCI: Octyldodecyl Oleate)), decyl oleate (label name (INCI: Decyl Oleate)), neopentyl glycol dioctanoate (label name (INCI: Neopentyl Glycol Diethylhexanoate)), neopentyl glycol dicaprate (label name (INCI: Neopentyl Glycol Dicaprate), Diisostearyl Malate (Indication Name (INCI: Diisostearyl Malate)), Triethyl Citrate (Indication Name (INCI: Triethyl Citrate)Citrate), Diethylhexyl succinate (Label Name (INCI: Diethylhexyl Succinate)), Amyl acetate (Label Name (INCI: Amyl Acetate)), Ethyl acetate (Label Name (INCI: Ethyl Acetate)), Butyl acetate (Label Name (INCI: Butyl Acetate)), Isocetyl stearate (Label Name (INCI: Isocetyl Stearate)), Butyl stearate (Label Name (INCI: Butyl Stearate)), Diisopropyl sebacate (Label Name (INCI: Diisopropyl Sebacate)), Diethylhexyl sebacate (Label Name (INCI: Diethylhexyl Sebacate)), Cetyl lactate (Label Name (INCI: Cetyl Lactate)), Myristyl lactate (Label Name (INCI: Myristyl Lactate)), Isononyl isononanoate (Label Name (INCI: Isononyl Palmitate esters such as isotridecyl isononanoate (label name (INCI: Isotridecyl Isononanoate)), isopropyl palmitate (label name (INCI: Isopropyl Palmitate)), ethylhexyl palmitate (label name (INCI: Ethylhexyl Isopalmitate)), and hexyldecyl palmitate (label name (INCI: Isocetyl Palmitate, Hexyldecyl Palmitate)), cholesteryl hydroxystearate (label name (INCI: Cholesteryl Hydroxystearate)), isopropyl myristate (label name (INCI: Isopropyl Myristate)), octyldodecyl myristate (label name (INCI: Octyldodecyl Myristate)), and myristyl myristate (label name (INCI: Myristyl Myristate), ethylhexyl laurate (labeled as (INCI: Ethylhexyl Laurate)), hexyl laurate (labeled as (INCI: Hexyl Laurate)), dioctyldodecyl lauroyl glutamate (labeled as (INCI: DioctyldodecylLauroyl Glutamate), lauroyl sarcosine isopropyl ester (labeled name (INCI: Isopropyl Lauroyl Sarcosinate)), etc. Furthermore, among ester oils, examples of glyceride oils include triethylhexanoin (INCI), tri(caprylic / capric)glyceryl (labeled as (INCI: Caprylic / Capric Triglyceride)), cocoglyceryl (INCI), (caprylic / capric / succinic) triglyceride (labeled as (INCI: Caprylic / Capric / Succinic Triglyceride)), and (caprylic / capric) glycerides (labeled as (INCI: Caprylic / Capric Glycerides)).

[0096] Silicone oil Examples of silicone oils include alkyl-modified silicones such as dimethicone, trisiloxane, methyl trimethicone, ethyl trisiloxane, ethyl methicone, and hexyl dimethicone, long-chain alkyl-modified silicones such as caprylyl methicone, low- to high-viscosity linear or branched organopolysiloxanes such as phenyl trimethicone, diphenyl dimethicone, diphenylsiloxyphenyl trimethicone, tetraphenyldimethyldisiloxane, and methylhydrogen polysiloxane, and cyclic organopolysiloxanes such as cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane. Examples of such silicone rubbers include amino-modified organopolysiloxanes such as methyl methyl siloxane, amodimethicone, and aminopropyl dimethicone, pyrrolidone-modified organopolysiloxanes such as PCA dimethicone, pyrrolidone carboxylic acid-modified organopolysiloxanes, gummy dimethylpolysiloxanes with high polymerization degrees, gummy amino-modified organopolysiloxanes, and gummy dimethylsiloxane-methylphenylsiloxane copolymers, as well as low-viscosity organopolysiloxane solutions of silicone gums and rubbers, amino acid-modified silicones, fluorine-modified silicones, silicone resins, and silicone resin solutions.

[0097] Fluorine-based oils Examples of fluorine-based oils include perfluorodecalin, perfluorononyl dimethicone, and perfluoromethylcyclopentane.

[0098] (3) Compounds with an alcoholic hydroxyl group Examples of compounds having an alcoholic hydroxyl group include lower alcohols preferably having 2 to 5 carbon atoms, such as ethanol (display name (INCI: Alcohol)) and isopropanol (display name (INCI: Isopropyl Alcohol)), and sugar alcohols, such as sorbitol, maltose, and xylitol. Further examples include sterols, such as cholesterol, sitosterol (display name (INCI: Beta-Sitosterol)), phytosterols, and lanosterol.

[0099] (4) Surfactants The surfactants include nonionic, anionic, cationic and amphoteric surfactants, but are not particularly limited, and any surfactants used in ordinary cosmetics can be used.

[0100] (5) Powder Examples of powders include color pigments, inorganic powders, metal powders, organic powders, inorganic-organic composite powders, etc. Specific examples are as follows:

[0101] Color pigments The color pigment is not particularly limited as long as it is a pigment that is normally used for coloring cosmetics, and examples thereof include red iron oxide (display name (INCI: Iron Oxides)), yellow iron oxide (display name (INCI: Iron Oxides)), white titanium oxide (display name (INCI: Titanium Dioxide)), black iron oxide (display name (INCI: Iron Oxides)), ultramarines (display name (INCI: Ultramarines)), ferric ferrocyanide (display name (INCI: Ferric Ferrocyanide, Ferric Ammonium Ferrocyanide)), manganese violet (display name (INCI: Manganese Violet)), cobalt titanate (display name (INCI: Cobalt Titanium Oxide)), chromium hydroxide (display name (INCI: Chromium Hydroxide Green)), chromium oxide (display name (INCI: Chromium Oxide Greens)), aluminum / cobalt oxide (display name (INCI: Cobalt Aluminum Oxide)), and the like. Any of the following pigments can be used: inorganic brown pigments such as titanium nitride (label name (INCI: Titanium Oxide)), cobalt titanate (label name (INCI: Cobalt Titanium Oxide)), (titanium / titanium oxide) baked product (label name (INCI: Titanium / Titanium Dioxide)), titanate (Li / cobalt) (label name (INCI: Lithium Cobalt Titanate)), cobalt titanate (label name (INCI: Cobalt Titanium Oxide)), (iron oxide / titanium oxide) sintered product (label name), iron oxide-doped titanium oxide (label name (INCI: Iron Oxides, Titanium Dioxide)), inorganic brown pigments such as titanium nitride (label name (INCI: Titanium Nitride)), ferrous hydroxide (label name (INCI: Iron Hydroxide)), gamma-iron oxide, inorganic yellow pigments such as ochre, and colored pigments such as lakes of tar-based pigments and lakes of natural pigments. The shape of the pigment may be any shape, such as spherical, approximately spherical, rod-like, spindle-like, petal-like, strip-like, or irregular, and there are no particular limitations on the geometric form as long as it is possible to impart color to the cosmetic.

[0102] ·Inorganic powder Inorganic powders include zirconium oxide (label name (INCI: Zirconium Dioxide)), zinc oxide (label name (INCI: Zinc Oxide)), cerium oxide (label name (INCI: Cerium Oxide)), magnesium oxide (label name (INCI: Magnesium Oxide)), barium sulfate (label name (INCI: Barium Sulfate)), calcium sulfate (label name (INCI: Calcium Sulfate)), magnesium sulfate (label name (INCI: Magnesium Sulfate)), calcium carbonate (label name (INCI: Calcium Carbonate)), magnesium carbonate (label name (INCI: Magnesium Carbonate)), talc, mica, kaolin, synthetic fluorphlogopite (label name (INCI: Synthetic Fluorphlogopite)), synthetic iron phlogopite, biotite (label name (INCI: Biotite)), potassium silicate (label name (INCI: Potassium Silicate), silica, aluminum silicate (labeled as (INCI: Aluminum Silicate)), magnesium silicate (labeled as (INCI: Magnesium Silicate)), aluminum / magnesium silicate (labeled as (INCI: Magnesium Aluminum Silicate)), calcium silicate (labeled as (INCI: Calcium Silicate)), aluminum / calcium / sodium silicate (labeled as (INCI: Aluminum Calcium Sodium Silicate)), lithium / magnesium / sodium silicate (labeled as (INCI: Lithium Magnesium Sodium Silicate)), sodium / magnesium silicate (labeled as (INCI: Sodium Magnesium Silicate)), calcium aluminum borosilicate (labeled as (INCI: Calcium Aluminum Borosilicate)), calcium / sodium borosilicate (labeled as (INCI: Calcium Sodium Borosilicate), Hydroxyapatite, Bentonite, Montmorillonite, Hectorite, Zeolite, Aluminum, Aluminum Hydroxide (Indication Name (INCI:Aluminum Hydroxide)), Boron Nitride (Indication Name (INCI:BoronExamples of suitable fine particles include fine particles made of glass (labeled name (INCI: Glass)), etc. Examples of inorganic colored pearl pigments include pearl agents such as mica coated with titanium oxide (display name (INCI: Titanium Dioxide)) and synthetic fluorophlogopite (display name (INCI: Synthetic Fluorphlogopite)) coated with titanium oxide (display name (INCI: Titanium Dioxide)), as well as pearl pigments such as bismuth oxychloride (display name (INCI: Bismuth Oxychloride)), bismuth oxychloride (display name (INCI: Bismuth Oxychloride)) coated with titanium oxide (display name (INCI: Titanium Dioxide)), talc coated with titanium oxide (display name (INCI: Titanium Dioxide)), fish scale leaf (display name), and colored mica coated with titanium oxide (display name (INCI: Titanium Dioxide)), and are not particularly limited and may be untreated or may have been subjected to a known surface treatment commonly used in cosmetics.

[0103] ·Metal powder Examples of metal powder include fine metal particles made of Al (display name (INCI: Aluminum, Aluminum Powder)), copper (display name (INCI: Copper Powder)), silver (display name (INCI: Silver Powder)), gold (display name (INCI: Gold)), etc.

[0104] ·Organic powder Examples of organic powders include powders made from silicone, polyamide, polyacrylic acid / acrylic acid ester, polyester, polyethylene, polypropylene, polystyrene, styrene / acrylic acid copolymer, divinylbenzene / styrene copolymer, polyurethane, vinyl resin, urea resin, melamine resin, benzoguanamine, polymethylbenzoguanamine, tetrafluoroethylene, polymethyl methacrylate, cellulose, silk, nylon, phenolic resin, epoxy resin, polycarbonate, etc.

[0105] Further, examples of the organic powder include organic pigments, and specific examples thereof include Red 3, Red 104(1) (label name (INCI: Red 28, Red 28 Lake)), Red 106, Red 201 (label name (INCI: Red 6)), Red 202 (label name (INCI: Red 7)), Red 204, Red 205, Red 220 (label name (INCI: Red 34)), Red 226 (label name (INCI: Red 30)), Red 227 (label name (INCI: Red 33, RED 33 Lake)), Red 228 (label name (INCI: Red 36)), Red 230(1) (label name (INCI: Red 22, Red 22 Lake)), Red 230(2) (label name), Red 401, Red 505, Yellow 4 (label name (INCI: Yellow 5)), Yellow 5 (Display name (INCI: Yellow 6, Yellow 6 Lake)), Yellow 202 (1) (Display name (INCI: Yellow 8)), Yellow 203 (Display name (INCI: Yellow 10, Yellow 10 Lake)), Yellow 204 (Display name (INCI: Yellow 11)), Yellow 401, Blue 1 (Display name (INCI: Blue) 1, Blue 1 Lake)), Blue 2, Blue 201, Blue 205 (Display name (INCI:Blue 4)), Blue 404, Green 3 (Display name (INCI:Green 3, Green3 Lake))), Green 201 (Display name (INCI:Green 5))), Green 202 (Display name (INCI:Green 6)), Green 204 (Display name (INCI:Green) 8)), green 205, orange 201 (display name (INCI:Orange) Copper tar dyes such as Orange 203 (Inc. Pigment Orange 5), Orange 204 (Inc. Orange 205), Orange 4, Orange 4 Lake (Inc. Orange 10), and Orange 207 (Inc. Orange 11), cochineal, laccaic acid (Inc. Laccaic Acid), safflower red (Inc. Carthamus Tinctorius (Safflower) Flower Extract), and purple root extract (Inc. Lithospermum Officinale Root Extract).Examples of natural pigments include gardenia yellow and gardenia blue (labeled as INCI: Hydrolyzed Gardenia Florida Extract).

[0106] ·Inorganic / organic composite powder The inorganic-organic composite powder may be, for example, a composite powder in which the surface of an inorganic powder is coated with an organic powder by a known or commonly used method. The above-mentioned powders may also be surface-treated. The hydrophobicity-imparting agent is not particularly limited, and examples thereof include silicone treatments, waxes, paraffins, organic fluorine compounds such as perfluoroalkyl phosphates, surfactants, amino acids such as N-acylglutamic acid, and metal soaps such as aluminum stearate and magnesium myristate.

[0107] (6) Film-forming agent As the film-forming agent, trimethylsiloxysilicate, acrylic-silicone film-forming agent, silicone-modified norbornene, silicone-modified pullulan, etc. can be used.

[0108] (7) Antiperspirant Antiperspirants are not particularly limited as long as they contain a component that suppresses sweat production by astringing the skin, and a wide variety of commonly used components can be used, including, for example, aluminum hydroxyhalides such as aluminum chlorohydrate and aluminum allantoin chlorohydrate, aluminum halides such as aluminum chloride, aluminum allantoin, tannic acid, persimmon tannin, potassium aluminum sulfate, zinc oxide, zinc paraphenolsulfonate, burnt alum, tetrachloro(Al / zirconium) hydrate, and trichlorohydrex glycine(Al / zirconium).

[0109] (8) Antibacterial agents Commonly used antibacterial agents include triclosan, benzalkonium chloride, benzethonium chloride, chlorhexidine hydrochloride, chlorhexidine gluconate, halocarban, and isomethylphenol. Essential oils and extracts derived from herbal medicines, such as dry distilled green tea extract, may also be blended to have antibacterial properties. Examples of antibacterial agents with deodorizing effects, such as essential oils and extracts derived from herbal medicines, include green tea extract, lavender extract, Scutellaria root extract, Coptis chinensis extract, Bark extract, Artemisia capillaris extract, Aloe arborescens extract, Sophora flavescens root extract, Sasa kumamoto leaf extract, garlic extract, Hamamelis virginiana extract, black tea extract, sage leaf extract, Japanese pepper extract, ginger root extract, Calamus calamus root extract, Hedera helix extract, Houttuynia cordata extract, peach fruit extract, peach leaf extract, peppermint leaf extract, Cnidium officinale extract, eucalyptus leaf extract, peanut seed coat extract, Ganoderma lucidum extract, and Sanguisorba officinalis extract. The plant extracts may be one type or a mixture of two or more types.

[0110] (9) Other additives Other additives include oil-soluble gelling agents, UV absorbing / scattering agents, moisturizers, preservatives, fragrances, salts, antioxidants, pH adjusters, chelating agents, cooling agents, anti-inflammatory agents, skin-beautifying ingredients (whitening agents, cell activators, skin roughness improving agents, blood circulation promoters, skin astringents, antiseborrheic agents, etc.), vitamins, amino acids, nucleic acids, hormones, and inclusion compounds.

[0111] Oil-soluble gelling agent Examples of oil-soluble gelling agents include metal soaps such as aluminum stearate, magnesium stearate, and zinc myristate; amino acid derivatives such as lauroyl glutamic acid (labeled as "Lauroyl Glutamic Acid" in Inc.) and α,γ-di-n-butylamine; dextrin palmitate (labeled as "Dextrin Palmitate" in Inc.), dextrin isostearate (labeled as "Dextrin Isostearate" in Inc.), dextrin myristate (labeled as "Dextrin Myristate" in Inc.), inulin stearate (labeled as "Stearoyl Inulin" in Inc.), and dextrin (palmitate / ethylhexanoate) (labeled as "Dextrin" in Inc.). dextrin fatty acid esters such as dextrin palmitate / ethylhexanoate); sucrose fatty acid esters such as sucrose palmitate and sucrose stearate; fructooligosaccharide fatty acid esters such as fructooligosaccharide stearate and fructooligosaccharide 2-ethylhexanoate; benzylidene derivatives of sorbitol such as monobenzylidene sorbitol and dibenzylidene sorbitol; disteardimonium hectorite, stearalkonium hectorite, organically modified clay minerals of hectorite; and stearalkonium bentonite.

[0112] UV absorbing and scattering agent Examples of ultraviolet absorbing / scattering agents include particles that absorb and scatter ultraviolet light, such as fine particle titanium oxide, fine particle iron-containing titanium oxide, fine particle zinc oxide, fine particle cerium oxide, and composites thereof. Dispersions in which these particles that absorb and scatter ultraviolet light are dispersed in an oil agent in advance can also be used.

[0113] Moisturizer Moisturizing agents include polyhydric alcohols such as BG (display name (INCI: Butylene Glycol)), PG (display name (INCI: Propylene Glycol)), DPG (display name (INCI: Dipropylene Glycol)), pentylene glycol, 1,10-decanediol, octanediol, 1,2-hexanediol, erythritol, glycerin, diglycerin, and polyethylene glycol; glucose, glyceryl glucoside, betaine, sodium chondroitin sulfate (display name (INCI: Sodium Chondroitin Sulfate)), PCA-Na (display name (INCI: Sodium PCA)), methyl gluceth-10, methyl gluceth-20, and hyaluronic acid. Examples of such lecithin include phospholipids, phospholipids such as phospholipids, phospholipids containing ...

[0114] Preservatives Examples of preservatives include alkyl parahydroxybenzoates, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, and phenoxyethanol. Examples of antibacterial agents include benzoic acid, salicylic acid, carbolic acid, sorbic acid, alkyl parahydroxybenzoates, parachlorometacresol, hexachlorophene, trichlorocarbanilide, photosensitizers, and phenoxyethanol.

[0115] ·Fragrance Fragrances include natural and synthetic fragrances. Natural fragrances include plant-based fragrances isolated from flowers, leaves, wood, and peels; and animal-based fragrances such as musk and civet. Synthetic fragrances include hydrocarbons such as monoterpenes; alcohols such as aliphatic alcohols and aromatic alcohols; aldehydes such as terpene aldehydes and aromatic aldehydes; ketones such as alicyclic ketones; esters such as terpene esters; lactones; phenols; oxides; nitrogen-containing compounds; and acetals.

[0116] ·salts Examples of salts include inorganic salts, organic acid salts, amine salts, and amino acid salts. Examples of inorganic salts include sodium salts, potassium salts, magnesium salts, calcium salts, aluminum salts, zirconium salts, and zinc salts of inorganic acids such as hydrochloric acid, sulfuric acid, carbonic acid, and nitric acid; examples of organic acid salts include salts of organic acids such as acetic acid, dehydroacetic acid, citric acid, malic acid, succinic acid, ascorbic acid, and stearic acid; examples of amine salts and amino acid salts include salts of amines such as triethanolamine, and salts of amino acids such as glutamic acid. In addition, salts of hyaluronic acid, chondroitin sulfate, aluminum zirconium glycine complex, and even acid-alkali neutral salts used in cosmetic formulations can also be used.

[0117] Antioxidants The antioxidant is not particularly limited, but examples thereof include carotenoids, ascorbic acid and its salts, ascorbyl stearate, tocopherol, tocopherol acetate, tocopherol, pt-butylphenol, butylhydroxyanisole, dibutylhydroxytoluene, phytic acid, ferulic acid, thiotaurine, hypotaurine, sulfites, erythorbic acid and its salts, chlorogenic acid, epicatechin, epigallocatechin, epigallocatechin gallate, apigenin, campherol, myricetin, quercetin, etc. One type of antioxidant may be used alone, or two or more types may be used in combination.

[0118] pH adjuster Examples of pH adjusters include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogen carbonate, and ammonium hydrogen carbonate.

[0119] Chelating agents Examples of the chelating agent include alanine, edetate sodium salt, sodium polyphosphate, sodium metaphosphate, phosphoric acid, and the like.

[0120] · Cooling agent Examples of cooling agents include L-menthol and camphor.

[0121] Anti-inflammatory Anti-inflammatory agents include allantoin, glycyrrhizinic acid and its salts, glycyrrhetinic acid and stearyl glycyrrhetinate, tranexamic acid, azulene, and the like.

[0122] ·Skin-beautifying ingredients Skin-beautifying ingredients include whitening agents such as placenta extract, arbutin, glutathione, and saxifrage extract; cell activators such as royal jelly, photosensitizers, cholesterol derivatives, and calf blood extract; rough skin improving agents; blood circulation promoters such as nonylic acid vanillylamide, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, zingerone, cantharides tincture, ichthammol, caffeine, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, and γ-oryzanol; skin astringents such as zinc oxide and tannic acid; and antiseborrheic agents such as sulfur and thianthrol.

[0123] Vitamins Vitamins include vitamin A oil, retinol, retinol acetate, retinol palmitate, and other vitamin A compounds; riboflavin, riboflavin butyrate, flavin adenine nucleotide, and other vitamin B2 compounds; pyridoxine hydrochloride, pyridoxine dioctanoate, pyridoxine tripalmitate, and other vitamin B6 compounds; vitamin B12 and its derivatives; vitamin B15 and its derivatives; L-ascorbic acid, L-ascorbic acid dipalmitate, sodium L-ascorbic acid 2-sulfate, and dipotassium L-ascorbic acid phosphate diester. vitamin C such as ergocalciferol and cholecalciferol; vitamin D such as α-tocopherol, β-tocopherol, γ-tocopherol, dl-α-tocopherol acetate, dl-α-tocopherol nicotinate, and dl-α-tocopherol succinate; nicotinic acids such as nicotinic acid, benzyl nicotinate, and nicotinamide; vitamin H, vitamin P, pantothenic acids such as calcium pantothenate, D-pantothenyl alcohol, pantothenyl ethyl ether, and acetylpantothenyl ethyl ether; and biotin.

[0124] Amino acids Examples of amino acids include glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, aspartic acid, glutamic acid, cystine, cysteine, methionine, and tryptophan.

[0125] ·Nucleic acid Examples of nucleic acids include deoxyribonucleic acid.

[0126] ·hormone Examples of hormones include estradiol and ethenylestradiol.

[0127] ·Inclusion compounds Examples of the inclusion compound include cyclodextrin. [Example]

[0128] Examples will be described below, but the present invention is not limited to these examples. In the following description, unless otherwise specified, all "parts" and "%" are by mass.

[0129] Example 1 (Production of resin particles CP1) -Granulation process- 130 parts of cellulose acylate (DAC "L-50" manufactured by Daicel Corporation) was completely dissolved in 870 parts of ethyl acetate. This was added to a solution prepared by dispersing 60 parts of calcium carbonate and 26 parts of sodium sulfate in 600 parts of water, and the mixture was stirred for 1 hour. This dispersion was then added to a solution prepared by dispersing 3.0 parts of carboxymethyl cellulose (hereinafter also referred to as "CMC") and 120 parts of ethyl acetate in 600 parts of pure water. The resulting mixture was emulsified in a high-speed emulsifier (T25 digital ULTRA-TURRAX, manufactured by IKA) for 8500 min -1 The mixture was stirred for 10 minutes at 1000 rpm, and 10 parts of sodium hydroxide was added thereto, followed by stirring at 80°C for 3 hours to remove the organic solvent. To the resulting solution, 10 parts of diluted hydrochloric acid was added, and the residue was filtered. The filtered product was dispersed again in pure water to obtain a cellulose acylate particle dispersion (solid concentration: 10%).

[0130] -Saponification process- To 500 parts of the obtained cellulose acylate particle dispersion, 17.5 parts of a 20% aqueous sodium hydroxide solution was added, and the mixture was stirred for 6 hours at a saponification temperature of 30° C. Hydrochloric acid was added to the saponified suspension to adjust the pH to 7, and the obtained cellulose particles were filtered and repeatedly washed with pure water until the conductivity of the filtrate reached 50 μs / cm or less. The cake-like cellulose particles were then reslurried in pure water to obtain a cellulose particle dispersion (solid concentration 20%).

[0131] -Surface treatment- One part of chitosan lactate was added to 500 parts of the cellulose particle dispersion and stirred at room temperature for 5 hours. Eight parts of sodium stearate were added as a fatty acid salt and heated to 75°C. Sixty-five parts of a 5% aqueous solution of calcium chloride was added as a salt solution and stirred for 20 minutes to form a coating layer. The resulting particles were then repeatedly filtered and washed until the filtrate conductivity reached 50 μs / cm or less. After washing, the resulting cake was dried to obtain cellulose particles with a coating layer. The resulting particles were then mixed in an FM mixer (FM40, manufactured by Nippon Coke & Engineering Co.) for 2000 min while maintaining the mixer temperature at 25°C. -1 The mixture was stirred at a rotation speed of 1000 rpm for 1 hour to tan the surface of the coating layer.

[0132] Through the above steps, resin particles were obtained.

[0133] <Example 2> (Production of resin particles CP2) Resin particles CP2 were obtained in the same manner as in the production of resin particles CP1, except that the number of parts of CMC was changed as shown in Table 1 in the granulation step of resin particles CP1.

[0134] Example 3 (Production of resin particles CP3) Resin particles CP3 were obtained in the same manner as in the production of resin particles CP1, except that the saponification step was not carried out.

[0135] <Examples 4 to 11> (Production of Resin Particles CP4 to CP11) Resin particles CP4 to CP11 were obtained in the same manner as in the production of resin particles CP1, except that the following changes were made in the granulation step of resin particles CP1 according to Table 1. Parts of ethyl acetate to dissolve cellulose acylate When using a solvent other than ethyl acetate to dissolve cellulose acylate, mix the solvent with ethyl acetate. Number of copies of CMC If a surfactant is used, add it at the same time as the CMC. - Change the type and amount of salt solution

[0136] Example 12 (Production of resin particles CP12) In the granulation process of resin particles CP1, the cake obtained at the end of the saponification process was dried to obtain resin particles CP12 that were not subjected to a surface treatment.

[0137] Example 13 (Production of resin particles CP13) Resin particles CP13 were obtained by carrying out the same granulation process as for resin particles CP1 up to the saponification step, but by changing the surface treatment as follows. -Surface treatment- One part of chitosan lactate was added to 500 parts of the cellulose particle dispersion and stirred at room temperature for 5 hours. After adjusting the pH to 6 by adding aqueous sodium hydroxide, the particles were filtered and washed repeatedly until the filtrate conductivity reached 50 μs / cm or less. After washing, the resulting cake was dried to obtain resin particles CP12.

[0138] <Comparative Examples 1 to 4> (Production of Resin Particles CPC1 to CPC4) Resin particles CPC1 to CPC4 were obtained in the same manner as for resin particles CP1, except that the following changes were made in the granulation step of resin particles CP1 according to Table 1. Parts of ethyl acetate to dissolve cellulose acylate When using a solvent other than ethyl acetate to dissolve cellulose acylate, mix the solvent with ethyl acetate. Parts of sodium sulfate Number of copies of CMC If a surfactant is used, add it at the same time as the CMC. ·Mixing conditions for high-speed emulsifier in the granulation process

[0139] <Comparative Example 5> Porous cellulose particles ("CELLULOBEADS D-10" manufactured by Daito Chemical Industry Co., Ltd.) were prepared. <Comparative Example 6> Nylon particles ("SP-10" manufactured by Toray Industries, Inc.) were prepared. <Comparative Example 7> Titanium oxide particles ("Tipure R104" manufactured by Chemours) were prepared. <Comparative Example 8> Porous cellulose particles ("Cellflow C-25" manufactured by JNR Corporation) were prepared.

[0140] <Evaluation> The particles of each example were subjected to the following evaluations.

[0141] (characteristic) The properties of the particles of each example were measured according to the methods already described. ·Volume average particle size (particle D50v) Average long diameter of independent pores -Porosity due to independent pores -Porosity due to interconnected pores Average particle circularity

[0142] (Shielding maintenance when wet) A disk-shaped aluminum container (area: approx. 8.5 cm) for making foundation 2 The bottom of the ) was painted red. Next, 1 g of particles from each example was placed on the bottom of the container and subjected to 100 kg / cm 2 The mixture was solidified by applying a pressure of 1000 kJ / cm. Next, two drops of artificial sebum (BIOCHEMAZONE "D4265-14") were dropped onto the solidified film to wet it. The degree of transparency and the degree of redness of the wetted portion were then visually observed according to the following criteria. A: No transparency and no red color is observed B: Slight transparency but no red color observed C: Transparent but no red color is observed D: Transparent and red color is observed

[0143] (Light transmittance and haze) 0.5 g of particles from each example and 4.5 g of a liquid silicone film-forming agent (KF-7312L, manufactured by Shin-Etsu Chemical Co., Ltd.) were placed in a 20 mL vial, and the mixture was stirred with a rotor for 24 hours and then ultrasonically treated for 2 minutes. Using an applicator, the prepared mixture was applied to a PET film with a thickness of 30 μm and dried overnight to prepare a film for evaluation. The total light transmittance and diffuse transmittance of the evaluation film were measured using a haze meter. The haze value was calculated using the formula: haze value = diffuse transmittance / total light transmittance x 100. The evaluation criteria were as follows: -Total light transmittance- A: 86% or more B: 83% or more but less than 86% C: 76% or more but less than 83% D: Less than 76% -Hayes- A: 80% or more B: 75% or more but less than 80% C: 68% or more but less than 75% D: Less than 75%

[0144] (biodegradable) The biodegradability of each particle under aerobic conditions was measured for four weeks using a method in accordance with JIS K6950:2000 (ISO 14851:1999). The evaluation criteria were as follows: A: Decomposition rate is 60% or more B: Decomposition rate is 30% or more but less than 60% C: Decomposition rate is less than 30%

[0145] Details of the abbreviations in Tables 1 and 2 are as follows: SANa: Sodium stearate SGNa: Sodium stearoyl glutamate SA / Ca: Calcium salt of stearic acid SA / Al: Aluminum salt of stearic acid SA / Mg: Magnesium salt of stearic acid SG / Ca: Calcium salt of stearoyl glutamic acid SG / Al: Aluminum salt of stearoyl glutamic acid Tween 85: Polyoxyethylene (20) sorbitan trioleate (Tokyo Chemical Industry Co., Ltd.)

[0146] [Table 1]

[0147] [Table 2]

[0148] The above results show that the resin particles of this example are superior in maintaining shielding properties when wet compared with the particles of the comparative example, and that both transparency and haze are achieved. This shows that when the resin particles of this example are applied to cosmetics, the cosmetics are able to suppress discoloration when wet with sebum and have excellent soft focus properties.

[0149] <Product Evaluation> Using the resin particles CP1 of Example 1 or the resin particles CP12 of Example 12, cosmetic evaluation was carried out as follows.

[0150] (W / O sunscreen) -W / O sunscreen composition- Component 1: Resin particles CP1 of Example 1: 1.0 part Ingredient 2: Decamethylcyclopentasiloxane (Note 1): 12.0 parts Ingredient 3: Diphenylsiloxyphenyl trimethicone (Note 2): 2.0 parts Ingredient 4: Ethylhexyl methoxycinnamate: 7.5 parts Ingredient 5: Diethylaminohydroxybenzoyl hexyl benzoate: 2.0 parts Ingredient 6: Orthotrichlene: 2.5 parts Component 7: Crosslinked polyether-modified silicone mixture (Note 3): 4.0 parts Ingredient 8: Cetyl PEG / PPG-10 / 1 Dimethicone (Note 4): 2.0 parts Ingredient 9: 1,3-butylene glycol: 3.0 parts Ingredient 10: Sodium citrate: 0.5 parts Ingredient 11: Sodium chloride: 0.5 parts Ingredient 12: Ethanol: 5.0 parts ·Ingredient 13 Purified water: 58.0 parts (Note 1) KF-995 (Shin-Etsu Chemical Co., Ltd.) (Note 2) KF-56A (Shin-Etsu Chemical Co., Ltd.) (Note 3) KSG-210 (Shin-Etsu Chemical Co., Ltd.) (Note 4) KF-6048 Cetyl PEG / PPG-10 / 1 Dimethicone (Shin-Etsu Chemical Co., Ltd.)

[0151] -Manufacture and evaluation of W / O sunscreen- The above components 1 to 8 were stirred and mixed uniformly. Separately, components 9 to 12 were uniformly dissolved in component 13, and the resulting solution was gently added to the mixture of components 1 to 8 and stirred to form an emulsion. This was filled into a specified container to obtain a W / O sunscreen. The resulting W / O sunscreen had a light feel and no oily feel, and spread easily, was highly transparent, and formed a uniform film with high water repellency.

[0152] (O / W sunscreen cream) -O / W sunscreen cream composition- Ingredient 1: Polyglyceryl-5 stearate (Note 1): 5.0 parts Ingredient 2: Cetyl alcohol: 2.0 parts Ingredient 3: Butylene glycol: 3.0 parts Ingredient 4: Triethylhexanoin: 7.5 parts Ingredient 5: Polyglyceryl-10 decaisostearate (Note 2): 0.5 parts Ingredient 6: Cyclopentasiloxane: 5.0 parts Ingredient 7: Mineral oil: 7.5 parts Ingredient 8: Cetyl ethylhexanoate: 7.5 parts Ingredient 9: Lipophilic fine particle titanium dioxide: 5.0 parts Ingredient 10: Lipophilic fine particle zinc oxide: 1.0 parts Component 11: Resin particles CP1 of Example 1: 1.0 part Ingredient 12: Glyceryl behenate, Polyglyceryl-6 octastearate (Note 3): 0.5 parts Ingredient 13: Xanthan gum: 0.2 parts Ingredient 14: Bentonite (10% water swelling liquid): 5.0 parts Ingredient 15: Water: 49.3 parts (Note 1) Sunsoft A-181E-C (Taiyo Kagaku Co., Ltd.) (Note 2) Sun Oil DDI (Taiyo Kagaku Co., Ltd.) (Note 3) TAISET 50-C (manufactured by Taiyo Kagaku Co., Ltd.)

[0153] -Production and evaluation of oil-and-wash sunscreen cream- Step A: Mix ingredients 1 and 15, then add ingredients 2 and a portion of ingredient 3 and mix. Procedure B: Components 4 to 8 were mixed, and then components 9 to 11 and component 12 were added while stirring. Procedure C: While stirring, the mixture obtained in Procedure B was gradually added to the mixture obtained in Procedure A and stirred. Step D: Add the remaining ingredient 3 and ingredient 13 and disperse, then mix in ingredient 14. Procedure E: The mixture obtained in Procedure D was gradually added to the mixture obtained in Procedure C while stirring, and an O / W sunscreen cream was obtained by stirring. The obtained O / W sunscreen cream spread easily, was fresh and non-sticky, and had a uniform, transparent film.

[0154] (lipstick) -Lipstick composition- Ingredient 1: Decamethylcyclopentasiloxane: 28.7 parts Ingredient 2: Isotridecyl isononanoate: 10.0 parts Ingredient 3: Diisostearyl malate: 5.0 parts Ingredient 4: Candelilla wax: 10.0 parts Component 5: Polyethylene: 6.0 parts Component 6: Resin particles CP1 of Example 1: 1.0 part Ingredient 7: Microcrystalline wax: 2.0 parts Ingredient 8: Trimethylsiloxysilicate mixture (Note 1): 20.0 parts Ingredient 9: (Vinyl dimethicone / Lauryl dimethicone) crosspolymer (Note 2): 5. 0 copies Ingredient 10: Silicone branched alkyl polyglycerin co-modified silicone (Note 3): 3.0 parts Component 11: Colorant: 1.3 parts Ingredient 12: Mica: 8.0 parts (Note 1) KF-7312J: A mixture of 50% trimethylsiloxysilicate and 50% cyclopentasiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.) (Note 2) KSG-43 (vinyl dimethicone / lauryl dimethicone) crosspolymer + triethylhexanoin mixture (Shin-Etsu Chemical Co., Ltd.) (Note 3) KF-6115 Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone (Shin-Etsu Chemical Co., Ltd.)

[0155] -Lipstick manufacturing / evaluation- Procedure A: Component 11 was mixed with a portion of Component 2 and dispersed using a roll mill. The resulting dispersion was then heated and mixed with Component 1, the remainder of Component 2, and Components 3 to 12 to obtain a composition. Procedure B: The composition obtained in Procedure A was poured into a mold and cooled to solidify, yielding a stick-shaped lipstick. The lipstick obtained was found to have excellent spreadability and good film uniformity.

[0156] (Non-aqueous mousse-type foundation) -Composition of non-aqueous mousse-type foundation- Ingredient 1: (Dimethicone / (PEG-10 / 15)) Crosspolymer (Note 1): 18.00 parts Ingredient 2: Dimethicone (Note 2): 1.00 parts Ingredient 3: Decamethylcyclopentasiloxane: 11.00 parts Ingredient 4: Ethylhexyl methoxycinnamate: 5.00 parts Ingredient 5: Jojoba oil: 1.00 parts Ingredient 6: Silylated anhydrous silica (Note 3): 0.75 parts ·Ingredient 7: KTP-09R (note 4): 0.20 parts ·Ingredient 8: KTP-09Y (note 4): 1.00 parts ·Ingredient 9: KTP-09B (note 4): 0.02 parts ·Ingredient 10: KTP-09W (note 4): 5.00 parts Ingredient 11: KF-9909 (Note 5) treated talc: 11.55 parts Ingredient 12: Dissolved trimethylsiloxysilicate (Note 6): 4.00 parts Ingredient 13: Decamethylcyclopentasiloxane (Note 7): 25.28 parts Component 14: Polysilicon-1 Crosspolymer (Note 8): 6.00 parts Ingredient 15: Polymethylsilsesquioxane (Note 9): 3.00 parts Component 16: Resin particles CP1 of Example 1: 7.00 parts Ingredient 17: Antioxidant: 0.20 parts (Note 1) KSG-240 Cyclopentasiloxane + (Dimethicone / (PEG-10 / 15)) Crosspolymer Mixture (Shin-Etsu Chemical Co., Ltd.) (Note 2) KF-96A (Shin-Etsu Chemical Co., Ltd.) (Note 3) Surface-hydrophobized fumed silica: Aerosil R-972 (manufactured by Nippon Aerosil Co., Ltd.) (Note 4) KF-9909 treated colored inorganic pigment, W: white, R: red, Y: yellow, B: black (Shin-Etsu Chemical Co., Ltd.) (Note 5) Triethoxysilylethyl polydimethylsiloxyethylhexyl dimethicone (Shin-Etsu Chemical Co., Ltd.) (Note 6) KF-7312J 50% trimethylsiloxysilicate dissolved in cyclopentasiloxane (Shin-Etsu Chemical Co., Ltd.) (Note 7) KF-995 (Shin-Etsu Chemical Co., Ltd.) (Note 8) KSP-411 (Shin-Etsu Chemical Co., Ltd.) (Note 9) KMP-590 (Shin-Etsu Chemical Co., Ltd.)

[0157] -Production and evaluation of non-aqueous mousse-type foundation- Components 1 to 10 were mixed uniformly using a roller. Components 11 to 17 were added to this mixture and mixed until uniform, yielding a non-aqueous mousse-like foundation. The obtained foundation had a firm, mousse-like appearance, spread easily, and was confirmed to have an excellent feel without stickiness or oiliness, and to have excellent makeup wearability.

[0158] (Wash-off type pack cosmetics) -Composition of wash-off type pack cosmetics- Ingredient 1: Dimethicone (Note 1): 3.0 parts Ingredient 2: Decamethylcyclopentasiloxane: 3.0 parts Component 3: Polyglycerin-modified silicone oil (Note 2): 2.0 parts Ingredient 4: Kaolin: 28.0 parts Component 5: Resin particles CP12 of Example 12: 2.0 parts Ingredient 6: Carbomer: 0.4 parts Ingredient 7: Butylene glycol: 10.0 parts Ingredient 8: Glycerin: 20.0 parts Ingredient 9: Preservative: 0.1 parts ·Ingredient 10: Fragrance: 0.1 part Ingredient 11: Water: 31.4 parts (Note 1) KF-96A (Shin-Etsu Chemical Co., Ltd.) (Note 2) KF-6105 Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone (Shin-Etsu Chemical Co., Ltd.)

[0159] -Production and evaluation of wash-off type face pack cosmetics- Procedure A: Components 1 to 3 and Component 9 were mixed. Procedure B: Components 6 to 8 and Component 11 were uniformly mixed, and then Components 4, 5 and 10 were added and stirred. Procedure C: The mixture obtained in Procedure A was added to the mixture obtained in Procedure B and emulsified to obtain a paste-like wash-off type pack cosmetic. The obtained wash-off type pack cosmetic spreads easily during application, has excellent cleansing effect, and after rinsing, leaves the skin feeling moist, non-sticky, and smooth, providing an excellent feeling when used, and it was also found to have excellent stability.

[0160] (deodorant stick) -Deodorant stick composition- Ingredient 1: Aluminum chlorate: 23.00 parts Ingredient 2: Decamethylcyclopentasiloxane: 36.50 parts Ingredient 3: Stearyl alcohol: 8.00 parts Ingredient 4: Talc: 13.88 parts ·Ingredient 5: Fragrance: 0.10 parts Component 6: BHT (dibutylhydroxytoluene): 0.02 parts Component 7: Paraffin (solid): 2.00 parts Ingredient 8: Mineral oil: 14.5 parts Component 9: Cross-linked polyether-modified silicone mixture (Note 1): 1.00 parts Component 10: Resin particles CP1 of Example 1: 1.00 part (Note 1) KF-6048 Cetyl PEG / PPG-10 / 1 Dimethicone (Shin-Etsu Chemical Co., Ltd.)

[0161] -Deodorant stick manufacturing / evaluation- Procedure A: Components 2 to 3 and 6 to 9 were heated, dissolved, and mixed. Step B: Components 1, 4, and 10 were mixed uniformly with the mixture obtained in Step A, and the mixture was dispersed and mixed uniformly using a mixer. Procedure C: Component 5 was added to the mixture obtained in Procedure B and mixed uniformly. Procedure D: The mixture obtained in Procedure C was poured into a mold and allowed to cool and solidify. The resulting deodorant stick was neither excessively dry nor sticky and had excellent durability of deodorizing effect.

[0162] (skin cleanser) -Skin cleanser composition- Component 1: Resin particles CP1 of Example 1: 1.0 part Ingredient 2: Polyoctanium-7 (Note 1): 0.1 part Ingredient 3: Potassium myristate: 20.0 parts Ingredient 4: Potassium palmitate: 5.0 parts Ingredient 5: Potassium stearate: 5.0 parts Ingredient 6: Potassium laurate: 3.0 parts Ingredient 7: Glycerin: 25.0 parts ·Component 8: PEG-6(H(OCH2CH2) n OH (n=average 6)): 5.0 copies ·Component 9: PEG-32(H(OCH2CH2) n OH(n=average 32)): 5.0 copies Ingredient 10: Sorbitol: 5.0 parts Ingredient 11: Glycosyltrehalose (Note 2): 2.0 parts Ingredient 12: Glyceryl stearate: 1.5 parts Ingredient 13: Kaolin: 1.0 parts Ingredient 14: Phytosteryl Isostearate: 0.5 parts Ingredient 15: Sodium Methyl Cocoyl Taurate: 1.0 parts Ingredient 16: Hydrogenated starch hydrolysate: 1.2 parts Ingredient 17: Water: 18.7 parts (Note 1) MERQUAT 550 (manufactured by Lubrizol) (Note 2) Tornare (Hayashibara Publishing)

[0163] -Production / Evaluation of Skin Cleansing Agents- The above ingredients 1 to 17 were mixed in a homomixer to prepare a skin cleanser. A facial cleanser was prepared from the obtained skin cleanser, and when the face was washed with the foam, the skin felt refreshed and had a moderate moisturizing feel.

[0164] (powder foundation) - Composition of powder foundation - [Table 3]

[0165] -Production and evaluation of powder foundation- The components shown in Table 3 above were molded in a metal plate press to obtain a powder foundation. When the obtained powder foundation was applied to the inside of the arm with a puff, it felt smooth and moist.

[0166] This embodiment includes the following aspects. (((1))) Resin particles having independent pores therein, a volume average particle size of 1 μm or more and 30 μm or less, an average major axis of the independent pores of 0.1 μm or more and 2.0 μm or less, and a porosity of the independent pores of 1% or more and 40% or less. (((2))) Resin particles according to (((1))) which contain a biodegradable resin as a main component. (((3))) The resin particles according to (((2))), wherein the biodegradable resin is cellulose. (((4))) The resin particles according to any one of (((1))) to (((3))), wherein the average major axis of the closed pores is 0.1 μm or more and 1.5 μm or less. (((5))) The resin particles according to any one of (((1))) to (((4))), wherein the porosity of the closed pores is 1% or more and 20% or less. (((6))) A cosmetic comprising the resin particles according to any one of (((1))) to (((5))).

[0167] The effects of the above embodiment are as follows. According to the invention of (((1))), there is provided resin particles which have internal closed pores, and which have excellent shielding properties when wet and can achieve both transparency and haze, compared to resin particles in which the volume average particle size is less than 1 μm or more than 30 μm, the average major axis of the closed pores is less than 0.1 μm or more than 2.0 μm, or the porosity due to the closed pores is less than 1% or more than 40%. According to the invention (((2))), resin particles are provided which are superior in biodegradability and shielding retention when wet, as well as achieving both transparency and haze, compared to when a non-biodegradable resin is contained as the main component. According to the invention (((3))), resin particles are provided which are superior in biodegradability and shielding properties when wet, as well as achieving both transparency and haze, compared to those containing cellulose derivatives. According to the invention (((4))), resin particles are provided which have excellent shielding properties when wet and can achieve both transparency and haze, compared to when the average major axis of the closed pores is less than 0.1 μm or more than 1.5 μm. According to the invention (((5))), resin particles are provided which have excellent shielding properties when wet and can achieve both transparency and haze, compared to when the porosity due to closed pores is less than 1% or more than 20%. According to the invention of (((6))), a cosmetic product is provided which suppresses color sinking when wet with sebum and has excellent soft focus properties, compared to when resin particles are used which have internal closed pores and a volume average particle size of less than 1 μm or more than 30 μm, an average major axis of the closed pores of less than 0.1 μm or more than 2.0 μm, or a porosity due to the closed pores of less than 1% or more than 40% are used.

Claims

1. Resin particles having independent pores therein, a volume average particle size of 1 μm or more and 30 μm or less, an average major axis of the independent pores of 0.1 μm or more and 2.0 μm or less, and a porosity of the independent pores of 1% or more and 40% or less.

2. The resin particles according to claim 1, which contain a biodegradable resin as a main component.

3. 3. The resin particles according to claim 2, wherein the biodegradable resin is cellulose.

4. 2. The resin particles according to claim 1, wherein the average major axis of the closed pores is 0.1 μm or more and 1.5 μm or less.

5. 2. The resin particles according to claim 1, wherein the porosity of the closed pores is 1% or more and 20% or less.

6. A cosmetic comprising the resin particles according to any one of claims 1 to 5.

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