Resin particle and cosmetic

Abstract

Disclosed are resin particles and a cosmetic, the resin particles having independent pores therein, the volume average particle diameter being 1 [mu] m or more and 30 [mu] m or less, the average major diameter of the independent pores being 0.1 [mu] m or more and 2.0 [mu] m or less, and the void fraction formed by the independent pores being 1% or more and 40% or less.

Description

Technical Field

[0001] The present disclosure relates to resin particles and cosmetics. Background Art

[0002] Japanese Patent Application Publication No. 2019-218307 proposes "a composition characterized by containing an aqueous medium, an oleophilic porous powder dispersed in the aqueous medium, an oil component with a viscosity of 100 mPa·s or less, a dispersant for dispersing the oleophilic porous powder in the aqueous medium, and water-retaining particles."

[0003] Japanese Patent Application Laid-Open No. 2022-176884 proposes a method for improving the efficiency of light extraction from the inside of the skin, characterized in that a cosmetic composition containing particles with a particle size having a Mie scattering region is applied to the skin surface. Summary of the Invention

[0004] The present invention aims to provide resin particles having independent pores therein, which have excellent shielding properties when wet, compared to particles having a volume average particle size of less than 1 μm or greater than 30 μm, an average major diameter of the independent pores of less than 0.1 μm or greater than 2.0 μm, or a porosity of less than 1% or greater than 40% formed by the independent pores, and which are capable of achieving a balance between transmittance and haze.

[0005] According to a first aspect of the present invention, there is provided a resin particle having independent pores therein, wherein the volume average particle size is from 1 μm to 30 μm inclusive, the average major axis of the independent pores is from 0.1 μm to 2.0 μm inclusive, and the porosity formed by the independent pores is from 1% to 40% inclusive.

[0006] According to a second aspect of the present invention, the resin pellets according to the first aspect contain a biodegradable resin as a main component.

[0007] According to a third aspect of the present invention, in the resin particles according to the second aspect, the biodegradable resin is cellulose.

[0008] According to a fourth aspect of the present invention, in the resin particles according to any one of the first to third aspects, an average major diameter of the closed pores is 0.1 μm or more and 1.5 μm or less.

[0009] According to a fifth aspect of the present invention, in the resin particles according to any one of the first to fourth aspects, a porosity formed by the closed pores is 1% or more and 20% or less.

[0010] According to a sixth aspect of the present invention, there is provided a cosmetic comprising the resin particles according to any one of the first to fifth aspects.

[0011] (Effect)

[0012] According to the first scheme, a resin particle is provided, which has independent pores inside and has excellent shielding maintenance when wet compared to the case where the volume average particle size is less than 1 μm or exceeds 30 μm, the average major axis of the independent pores is less than 0.1 μm or exceeds 2.0 μm, or the porosity formed by the independent pores is less than 1% or exceeds 40%, and can achieve a balance between permeability and haze.

[0013] According to the second aspect, there are provided resin pellets which are superior in biodegradability and shielding maintenance when wet compared to pellets containing a non-biodegradable resin as a main component, and which can achieve a balance between permeability and haze.

[0014] According to the third aspect, there are provided resin particles which are superior in biodegradability and shielding maintenance when wet compared to those containing a cellulose derivative, and which can achieve a balance between permeability and haze.

[0015] According to the fourth aspect, there is provided a resin particle having excellent shielding maintenance when wet compared to a case where the average major diameter of closed pores is less than 0.1 μm or exceeds 1.5 μm, and capable of achieving a balance between permeability and haze.

[0016] According to the fifth aspect, there is provided a resin particle which has excellent shielding maintenance when wet and can achieve a balance between permeability and haze, compared with a case where the porosity formed by closed pores is less than 1% or exceeds 20%.

[0017] According to the sixth embodiment, a cosmetic is provided that suppresses dullness of makeup when moistened with sebum and has excellent soft-focus properties, compared to a case where the following resin particles are used: the resin particles have independent pores inside, a volume average particle size of less than 1 μm or greater than 30 μm, an average major diameter of the independent pores of less than 0.1 μm or greater than 2.0 μm, or a porosity formed by the independent pores of less than 1% or greater than 40%. DETAILED DESCRIPTION

[0018] Hereinafter, an embodiment of the present invention will be described. These descriptions and examples are for illustrative purposes only and do not limit the scope of the present invention.

[0019] In the numerical ranges described in this specification, the upper limit or lower limit of one numerical range may be replaced by the upper limit or lower limit of another numerical range described in this specification. In addition, in the numerical ranges described in this specification, the upper limit or lower limit of the numerical range may be replaced by the values shown in the Examples.

[0020] Each component may also contain a plurality of corresponding substances.

[0021] When referring to the amount of each component in a composition, if there are multiple substances corresponding to each component in the composition, unless otherwise specified, the amount refers to the total amount of the multiple substances present in the composition.

[0022] <Resin pellets>

[0023] The resin particles of this embodiment have independent pores inside, a volume average particle size of 1 μm to 30 μm, an average major diameter of the independent pores of 0.1 μm to 2.0 μm, and a porosity of 1% to 40% formed by the independent pores.

[0024] The resin particles of the present embodiment have excellent shielding maintenance properties when wet due to the above-mentioned structure, and can achieve a balance between permeability and haze. The reason for this is presumably as follows.

[0025] Resin particles are used in a wide variety of applications. Therefore, they are required to have various functions. One such function is to achieve a balance between maintaining shielding properties when wet, as well as permeability and haze reduction.

[0026] For example, cosmetics, one of the applications of resin particles, require sebum absorption to prevent makeup from coming off and concealing properties to make wrinkles and pores less noticeable. To impart these properties, inorganic powders with high refractive index (i.e., high concealing power), such as titanium oxide and zinc oxide, are often incorporated into cosmetics.

[0027] On the other hand, with the recent rise in the desire for bare skin, particularly among young people, there is a demand for soft-focus properties that provide gentle coverage while maintaining a certain degree of translucency. Furthermore, makeup is also being asked to prevent dullness even after sebum absorption.

[0028] These requirements can be met by resin particles that offer a balance between maintaining coverage when wet, permeability, and haze. Specifically, the ability to achieve both permeability and haze allows for soft-focus properties with gentle coverage. Furthermore, maintaining coverage when wet allows for gentle coverage even with sebum absorption, minimizing the appearance of dull makeup.

[0029] However, there are known technologies that use water-retaining particles instead of inorganic powders with a high refractive index (i.e., high shielding power) (for example, Japanese Patent Publication No. 2019-218307), and technologies that use particles with a particle size having a Mie scattering region (for example, Japanese Patent Publication No. 2022-176884). However, these technologies have insufficient shielding maintenance when wet and insufficient balance between transmittance and haze.

[0030] As described above, the demand for resin particles to achieve a balance between shielding maintenance when wet, permeability, and haze has become increasingly high.

[0031] On the other hand, the resin particles of the present embodiment have closed pores inside, and the average major diameter of the closed pores and the porosity formed by the closed pores are set within the above-mentioned ranges.

[0032] The presence of closed pores of appropriate size and quantity within the particles allows light scattering by the closed pores even when the resin particles are wet, thereby improving shielding retention when wet. Furthermore, while maintaining transmittance, a blurring effect is also achieved.

[0033] Furthermore, by setting the volume average particle size of the resin particles in the above-mentioned range, it is easy to achieve a balance between shielding maintenance when wet, permeability, and haze.

[0034] From the above, it is estimated that the resin particles of the present embodiment are excellent in shielding maintenance when wet and can achieve a balance between permeability and haze.

[0035] Furthermore, since the resin particles of the present embodiment have the above-mentioned properties, a cosmetic containing the resin particles of the present embodiment suppresses dullness of makeup when moistened with sebum and has excellent soft-focus properties.

[0036] (Volume average particle size)

[0037] The volume average particle size of the resin particles of the present 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.

[0038] When the volume average particle size of the resin particles is less than 1 μm, the porosity formed by the closed pores tends to decrease, the shielding maintenance property when wet is reduced, and it becomes difficult to achieve a balance between permeability and haze.

[0039] When the volume average particle size of the resin particles exceeds 30 μm, the haze increases, making it difficult to achieve both haze and transmittance.

[0040] In particular, when the volume average particle size of the resin particles is within the above range, when the resin particles are applied to cosmetics, the cosmetic properties such as skin feel become good.

[0041] The volume average particle size of the resin particles is measured as follows.

[0042] The particle size was measured using an LS particle size distribution analyzer "Beckman Coulter LS13 320 (Beckman Coulter)". The cumulative distribution of the particle size was plotted from the smaller diameter side on a volume basis, and the particle size at which the cumulative distribution reached 50% was determined as the volume average particle size.

[0043] (Average length of independent pores and porosity of independent pores)

[0044] The resin particles of this embodiment have independent pores inside the particles. Here, independent pores refer to pores closed by partition walls.

[0045] Furthermore, the average major diameter of the closed pores is 0.1 μm to 2.0 μm, preferably 0.1 μm to 1.5 μm, more preferably 0.1 μm to 1.0 μm, and even more preferably 0.2 μm to 0.8 μm.

[0046] Furthermore, the porosity formed by the closed pores is 1% to 40%, preferably 1% to 20%, more preferably 1% to 15%, and even more preferably 3% to 10%.

[0047] When the average major diameter of the independent pores and the porosity formed by the independent pores are low, light scattering by the independent pores is difficult to occur, and it is difficult to achieve a balance between transmittance and haze.

[0048] When the average major diameter of the independent pores and the porosity formed by the independent pores are large, the permeability is too high, making it difficult to achieve a balance between permeability and haze.

[0049] (Area ratio of connected pores)

[0050] From the perspective of maintaining the shielding property when wet, the resin particles of this embodiment preferably have a low porosity or 0% formed by the interconnected pores. Here, the interconnected pores are pores that are not closed by partition walls and lead to the outside of the resin particles (in the case of a coating layer described later, the outside of the masterbatch).

[0051] Specifically, the porosity formed by the communicating pores is preferably 0% or more and 10% or less, and more preferably 0% or more and 5% or less.

[0052] (Method for determining the identification of independent pores and interconnected pores, the average major diameter of independent pores, and the porosity formed by independent pores and interconnected pores)

[0053] The methods for identifying the independent pores and the communicating pores, measuring the average major diameter of the independent pores, and the porosity formed by the independent pores and the communicating pores are as follows.

[0054] After the resin particles are embedded in the epoxy resin, they are cut with a diamond knife or the like to prepare a sample with the surface having the cross section of the resin particles as the observation surface.

[0055] The prepared sample was placed under a scanning electron microscope (SEM) and photographed using the scanning electron microscope to obtain an SEM image of a cross section of the resin particle (accelerating voltage: 1.0 kV, magnification: 20,000 times).

[0056] The obtained SEM images confirmed the presence of independent pores surrounded by partition walls on the cross section of the resin particles and continuous pores extending from the resin particle surface (or the mother particle surface if a coating layer described below is present) to the particle interior.

[0057] Next, the obtained SEM image is subjected to binarization by setting a threshold value using image analysis software (eg, ImageJ, WinROOF) so that voids and the epoxy resin as the background can be clearly distinguished.

[0058] Next, the maximum diameter of the closed pores of each resin particle is measured. This operation is performed on 10 resin particles, and the average value of the maximum diameters of the closed pores is calculated as the average major diameter.

[0059] Next, the area ratio of the total pores relative to the entire cross-section of the resin particle is calculated. Separately, the area ratio of the independent pores relative to the entire cross-section of the resin particle is calculated. If independent pores can be directly identified, the area ratio can be calculated without binarization.

[0060] The area ratio of the communicating pores was calculated by the formula: area ratio of the communicating pores = area ratio of the total pores - area ratio of the independent pores.

[0061] Then, the above operation was performed 10 times, and the obtained values were arithmetic averaged.

[0062] The cross-section of the resin particles to be observed is selected to have a cross-sectional diameter that is 85% or greater of the volume average particle diameter of the resin particles. Here, the cross-sectional diameter refers to the maximum length (so-called major diameter) of a straight line connecting two arbitrary points on the contour line of the cross-sectional area of the resin particles.

[0063] (Average roundness)

[0064] From the perspective of improving barrier maintenance when wet and achieving a balance between permeability and haze, the average circularity of the resin particles of this embodiment is preferably 0.88 or greater, more preferably 0.90 or greater, and even more preferably 0.92 or greater. A higher average circularity is particularly preferred when the resin particles are used in cosmetics, as it improves the feel on the skin.

[0065] Furthermore, the average circularity of the resin particles is preferably 1.

[0066] The circularity of the resin particles is determined by (circle-equivalent circumference) / (circumference) [(circumference of a circle having the same projected area as the particle image) / (circumference of the particle projected image)]. Specifically, it is a value measured by the following method.

[0067] First, the resin particles to be measured are suctioned and collected to form a flat stream. A particle image is captured as a still image by instantaneous stroboscopic light emission. This image is then analyzed using a flow-type particle image analyzer (FPIA-3000, manufactured by SYSMEX). The circularity is determined using a sample size of 3500, and the arithmetic mean is calculated, with the resulting value being the average circularity.

[0068] (Components of resin pellets)

[0069] The resin particles of the present embodiment contain resin as a main component.

[0070] Here, containing resin as the main component means that the content of the resin relative to the resin particles (master particles when having a coating layer described below) is 90% by mass or more (preferably 95% by mass or more, 98% by mass or more, or 100% by mass).

[0071] From the perspective of imparting biodegradability, biodegradable resins are preferred. Biodegradable resins are resins that are degraded into water and carbon dioxide by microorganisms. Specifically, while there is no quantitative definition of biodegradable resins in terms of degradation period or degradation rate, for example, according to JIS K6950:2000 (ISO 14851:1999), a resin with a biodegradation rate of 60% or greater within 60 days is defined as a biodegradable resin.

[0072] Examples of the biodegradable resin include cellulose, cellulose derivatives, polyester resins, natural polymers, and polyvinyl alcohol.

[0073] Among them, from the viewpoint of biodegradability, cellulose and cellulose derivatives are preferred, and cellulose is more preferred.

[0074] -Cellulose-

[0075] The number average molecular weight of cellulose is preferably 37,000 or more, more preferably 45,000 or more.

[0076] The upper limit of the number average molecular weight of cellulose is not particularly limited, but may be, for example, 100,000 or less.

[0077] The number average molecular weight of cellulose was 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 (added with 0.1 M lithium chloride) as a solvent.

[0078] - Cellulose derivatives -

[0079] Examples of the cellulose derivatives include cellulose acylate, cellulose ether, hydroxyalkyl cellulose, and carboxymethyl cellulose.

[0080] Among these, cellulose acylate is preferred as a cellulose derivative because cellulose acylate tends to improve rolling properties, oil absorption properties, and mechanical strength.

[0081] Cellulose acylate is a cellulose derivative in which at least a portion of the hydroxyl groups in cellulose are substituted (acylated) with acyl groups. AC (R AC represents a hydrogen atom or a hydrocarbon group. )

[0082] Cellulose acylate is, for example, a cellulose derivative represented by the following general formula (CA).

[0083]

[0084] In the general formula (CA), A 1 、A 2 and A 3 Each independently represents a hydrogen atom or an acyl group, and n represents an integer greater than 2. 1 、nA 2 and n A 3 At least one of the acyl groups is present in the molecule. 1 They may be all the same or partly the same, or they may be different from each other. 2 And there are n A 3 They may be entirely or partially identical, or may be different from each other.

[0085] Just A 1 、A 2 and A 3 Regarding the acyl group represented by , the hydrocarbon group in the acyl group may be any of linear, branched, and cyclic, but is preferably linear or branched, and more preferably linear.

[0086] Just A 1 、A 2 and A3 Regarding the acyl group represented by , the hydrocarbon group in the acyl group may be a saturated hydrocarbon group or an unsaturated hydrocarbon group, but a saturated hydrocarbon group is more preferred.

[0087] A 1 、A 2 and A 3 The acyl group represented by is preferably an acyl group having 1 to 6 carbon atoms. That is, as cellulose acylate, one having 1 to 6 carbon atoms in the acyl group is preferred.

[0088] A 1 、A 2 and A 3 The acyl group represented by may be a group in which the hydrogen atom in the acyl group is substituted with a halogen atom (eg, a fluorine atom, a bromine atom, an iodine atom), an oxygen atom, a nitrogen atom, etc., but is preferably unsubstituted.

[0089] As A 1 、A 2 and A 3 Examples of the acyl group represented by include formyl, acetyl, propionyl, butanoyl, acryloyl, and hexanoyl. Among these, from the viewpoint of increasing the biodegradation rate, the acyl group is more preferably an acyl group having 2 to 4 carbon atoms, and even more preferably an acyl group having 2 or 3 carbon atoms.

[0090] Examples of cellulose acylate include cellulose acetate (cellulose monoacetate, cellulose diacetate (DAC), and cellulose triacetate), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB).

[0091] From the viewpoint of improving rolling properties, oil absorption properties, and mechanical strength, cellulose acylate is preferably cellulose acetate.

[0092] Cellulose acylate may be used alone or in combination of two or more.

[0093] The weight average degree of polymerization of cellulose acylate is preferably 200 or more and 1000 or less, more preferably 500 or more and 1000 or less, further preferably 600 or more and 1000 or less.

[0094] The weight average degree of polymerization of cellulose acylate was determined from the weight average molecular weight (Mw) according to the following procedure.

[0095] First, the weight average molecular weight (Mw) of cellulose acylate was measured in terms of polystyrene using tetrahydrofuran with a gel permeation chromatography apparatus (GPC apparatus: HLC-8320GPC manufactured by Tosoh Corporation, column: TSKgel α-M).

[0096] Next, the degree of polymerization of cellulose acylate is determined by dividing the molecular weight of the structural unit of cellulose acylate. For example, when the substituent of cellulose acylate is an acetyl group, the molecular weight of the structural unit is 263 when the degree of substitution is 2.4, and the molecular weight of the structural unit is 284 when the degree of substitution is 2.9.

[0097] From the viewpoint of improving rolling properties, oil absorption properties, and mechanical strength, 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.

[0098] The degree of substitution of cellulose acylate is an indicator of the degree to which hydroxyl groups in cellulose are replaced by acyl groups. In other words, the degree of substitution is an indicator of the degree of acylation of cellulose acylate. Specifically, the degree of substitution is the intramolecular average of the number of acyl groups replacing three hydroxyl groups in the D-pyranose glucose unit of cellulose acylate. The degree of substitution is determined by infrared absorption spectroscopy (Spotlight 400 / PerkinElmer) based on the peak derived from the acyl group (1738 cm -1 ) and the peak derived from cellulose (1030 cm -1 ) is calculated.

[0099] Specifically, 1738cm -1 Absorbance / 1030cm -1 The absorbance value was defined as the degree of substitution.

[0100] -Polyester resin-

[0101] Examples of the polyester resin include aliphatic polyester resins and aliphatic aromatic polyester resins.

[0102] Examples of the aliphatic polyester resin include polylactic acid (PLA), polyglycolic acid (PGA), polyhydroxybutyrate, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), polycaprolactone, polybutylene succinate (PBS), polybutylene succinate / adipate (PBSA), and polyvinyl succinate (PES) and other polyhydroxyalkanoic acids.

[0103] Examples of the aliphatic aromatic polyester resin include polybutylene adipate / terephthalate (PBAT) copolymer resins and polytetramethylene adipate / terephthalate copolymer resins.

[0104] - Natural polymers -

[0105] Examples of natural polymers include starch, cellulose, chitin, chitosan, gluten, gelatin, zein, soybean protein, collagen, and keratin.

[0106] -Other ingredients-

[0107] The resin pellets according to the present embodiment may contain other components.

[0108] Examples of other components include plasticizers, flame retardants, compatibilizers, release agents, light stabilizers, weathering agents, colorants, pigments, modifiers, anti-drip agents, antistatic agents, hydrolysis inhibitors, fillers, reinforcing agents (glass fiber, carbon fiber, talc, clay, mica, glass flakes, ground glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride, boron nitride, etc.), acid acceptors for preventing the release of acetic acid (oxides such as magnesium oxide and aluminum oxide; metal hydroxides such as magnesium hydroxide, calcium hydroxide, aluminum hydroxide, and hydrotalcite; calcium carbonate; talc, etc.), reactive scavengers (for example, epoxy compounds, acid anhydride compounds, carbodiimides, etc.), and the like.

[0109] The content of other components is preferably 0% by mass or more and 5% by mass or less relative to the total amount of the resin pellets (or master pellets). Here, "0% by mass" means that no other components are contained.

[0110] (Layer Structure of Resin Particles)

[0111] The resin particles of the present embodiment may or may not have a coating layer.

[0112] That is, the resin particles of this embodiment may be resin particles having a multilayer structure including a masterbatch mainly composed of resin and a coating layer covering the masterbatch, or may be resin particles having a single layer structure including resin as the main component.

[0113] Here, an intermediate layer may be provided between the masterbatch and the coating layer.

[0114] When the resin particles of the present embodiment do not require water repellency, they preferably do not have a coating layer. When the resin particles of the present embodiment require water repellency, they preferably have a coating layer, more preferably a coating layer having a coverage rate of 80% to 100%.

[0115] -Coating layer-

[0116] The coating layer preferably contains a coating material selected from hydrophobic compounds. Specifically, the coating layer preferably contains at least one coating material selected from the group consisting of fatty acids, fatty acid metal salts, and amino acid compounds.

[0117] ·fatty acid

[0118] Fatty acids refer to straight-chain or branched saturated or unsaturated fatty acids. Fatty acids may also be a mixture of saturated fatty acids and unsaturated fatty acids.

[0119] The fatty acid is preferably a fatty acid having 14 to 22 carbon atoms (preferably 14 to 20 carbon atoms). Specific examples of the straight-chain fatty acid having 14 to 22 carbon atoms include behenic acid, arachidic acid, palmitic acid, stearic acid, isostearic acid, distearic acid, and myristic acid.

[0120] Fatty acid metal salts

[0121] The fatty acid metal salt refers to a linear or branched saturated or unsaturated fatty acid metal salt. The fatty acid metal salt may also be a mixture of a saturated fatty acid metal salt and an unsaturated fatty acid metal salt.

[0122] From the viewpoint of improving water repellency and moisturizing properties against high-temperature hot water, examples of fatty acid metal salts include metal salts of fatty acids having 14 to 22 carbon atoms (preferably 14 to 20 carbon atoms). Examples of metal salts of fatty acids having 14 to 22 carbon atoms include metal salts of stearic acid, metal salts of behenic acid, and metal salts of palmitic acid, myristic acid, and distearic acid.

[0123] Examples of the metal in the fatty acid metal salt include divalent metals.

[0124] Examples of the metal in the fatty acid metal salt include magnesium, calcium, aluminum, barium, and zinc.

[0125] Amino acid compounds

[0126] Amino acid compounds refer to amino acids and amino acid derivatives.

[0127] Examples of the amino acid compound include lauroyl lysine, lauryl arginine, myristyl leucine, stearoyl glutamic acid, and metal salts thereof.

[0128] The coating materials constituting the coating layer are not limited to the above-mentioned coating materials. For example, coating materials such as lipid compounds (phospholipids, etc.), silicone compounds (dimethylsiloxane, hydrogendimethylsilicone, etc.), fluorinated compounds (perfluoropolyether, perfluorooctyltriethoxysilane, etc.), and ceramide compounds (hydroxypropyl bispalmitamide MEA, etc.) can also be cited.

[0129] The coating amount of the coating layer relative to the mother particle 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.

[0130] 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.

[0131] The coverage of the coating layer with respect to the mother particle is preferably 80% or more and 100% or less, and more preferably 90% or more and 100% or less.

[0132] When the coverage of the coating layer is less than 80%, the region where the highly hydrophilic mother particle is exposed increases, and the water resistance of the resin pellet decreases.

[0133] The method for measuring the coverage of the coating layer is as follows.

[0134] The target resin particles were stained with ruthenium. In scanning electron microscope (SEM) observation, the coating layer was observed to be black due to the ruthenium staining.

[0135] The cellulose particles stained with ruthenium were observed under a 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 was calculated.

[0136] Then, this operation was performed on 50 resin pellets, and the arithmetic mean of the ratios of the areas of the coating layers obtained was calculated and taken as the coverage rate of the coating layer.

[0137] -Middle layer-

[0138] The intermediate layer preferably contains at least one intermediate material selected from the group consisting of polyamine compounds, polyquaternary ammonium salts, polysaccharide compounds, and polyacrylic acid.

[0139] By providing an intermediate layer between the mother particle and the coating layer, peeling of the coating layer is suppressed.

[0140] Polyamine compounds are a general term for aliphatic hydrocarbons having two or more primary amino groups.

[0141] Examples of the polyamine compound include polyalkyleneimine, polyallylamine, polyvinylamine, and polylysine.

[0142] From the viewpoint of improving biodegradability, the polyalkyleneimine is preferably a polyalkyleneimine containing a structural unit having an alkylene group having 1 to 6 carbon atoms (preferably 1 to 4 carbon atoms, more preferably 1 to 2 carbon atoms), and polyethyleneimine is more preferred.

[0143] Examples of the polyallylamine include homopolymers and copolymers of allylamine, allylamine amide sulfate, diallylamine, and dimethylallylamine.

[0144] Examples of polyvinylamine include those produced by hydrolyzing poly(N-vinylformamide) with an alkali, and specific examples include "PVAM-0595B" manufactured by Mitsubishi Chemical Corporation.

[0145] Polylysine may be extracted from natural products, produced by transforming microorganisms, or chemically synthesized.

[0146] Examples of the polyquaternium salt include polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-51, polyquaternium-61, and polyquaternium-64.

[0147] The content of the polyquaternium salt is preferably 0.2% by mass or more and 2% by mass or less relative to the entire masterbatch.

[0148] As polysaccharide compounds, chitin, chitosan, carboxymethyl cellulose etc. can be enumerated. In addition, as polysaccharide compounds, polysaccharides with sulfuric acid or phosphoric acid, polysaccharides with uronic acid (for example, glucuronic acid, iduronic acid, galacturonic acid, mannuronic acid) or polysaccharides with the structure of these two acids etc. can also be enumerated. Specifically, as polysaccharides, hyaluronic acid, gellan gum, deacylated gellan gum (DAG), neutral gum (rhamsan gum), diutan gum (diutan gum), xanthan gum, carrageenan, hexuronic acid, fucoidan, pectin, pectic acid, pectinic acid (pectinic acid), heparan sulfate, heparin, heparin sulfate, keratin sulfate, chondroitin sulfate, dermatan sulfate, rhamnosyl sulfate, alginic acid can be enumerated.

[0149] As the intermediate material used for the intermediate layer, a polysaccharide compound is preferred, and chitosan is more preferred.

[0150] The coating amount of the intermediate layer relative to the mother particle 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.

[0151] 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.

[0152] The ratio of the coating amount of the coating layer to the coating amount of the intermediate layer (i.e., ratio = coating amount of the coating layer / intermediate layer coating amount) is preferably 0.05 to 400, more preferably 1.5 to 150, and even more preferably 5 to 150.

[0153] (External additives)

[0154] The resin particles of this embodiment may also contain inorganic particles as an external additive. When inorganic particles are added externally, secondary aggregation of particles is suppressed, thereby making it easier for the particles to exhibit their original properties.

[0155] Examples of the external additive include at least one selected from the group consisting of silicon-containing compound particles and metal oxide particles.

[0156] The silicon-containing compound particles refer to particles containing silicon.

[0157] The silicon-containing compound particles may be particles containing only silicon or particles containing silicon and other elements.

[0158] The silicon-containing compound particles are preferably silica particles. Any silica particles containing silicon dioxide, i.e., SiO2, as a primary component may be crystalline or amorphous. Furthermore, the silica particles may be made from silicon compounds such as water glass and alkoxysilane, or may be obtained by crushing quartz.

[0159] As the metal oxide, oxides of metals other than silicon can be used.

[0160] Examples of the metal oxide include zinc oxide, magnesium oxide, iron oxide, and aluminum oxide.

[0161] 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.

[0162] The volume average particle size of the external additive is measured by the same method as that for the volume average particle size of the resin particles.

[0163] The amount of the external additive added is preferably 0.1% by mass or more and 2% by mass or less relative to the total mass of the resin pellets (resin pellets to which no external additive is added).

[0164] <Method for producing resin pellets>

[0165] The method for producing the resin pellets according to the present embodiment is not particularly limited.

[0166] As a specific example, when obtaining resin particles mainly composed of cellulose, the method for producing resin particles of this embodiment includes, for example, a step of producing cellulose acylate particles (hereinafter referred to as a granulation step) and a step of saponifying the cellulose acylate particles (hereinafter referred to as a saponification step).

[0167] Granulation process

[0168] (1) First, cellulose acylate is dissolved in a water-soluble organic solvent A to prepare a cellulose acylate solution A.

[0169] (2) Next, cellulose acylate solution A is added to a calcium carbonate dispersion prepared by dispersing calcium carbonate and a water-soluble inorganic salt in water, and the mixture is stirred to prepare cellulose acylate solution B.

[0170] (3) Next, cellulose acylate solution B is added to a mixed solution of carboxymethyl cellulose, a water-soluble organic solvent B, and water, and the mixture is stirred to prepare cellulose acylate solution C.

[0171] (4) Next, the cellulose acylate liquid 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.

[0172] Here, the water-soluble organic solvents A and B are solvents in which water is dissolved in an amount of 0.1% by mass or more and 10% by mass or less relative to the solvent at 25° C. Examples thereof include ethyl acetate, butyl acetate, methyl ethyl ketone, and acetone.

[0173] The water-soluble inorganic salt is preferably soluble in water at 9% or more at 20°C, particularly preferably soluble in water at 15% or more.

[0174] 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 bisulfate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate, magnesium nitrate, sodium carbonate, potassium carbonate, ammonium carbonate, and sodium bicarbonate. Preferred are sodium salts, potassium salts, and magnesium salts, and particularly preferred are sodium chloride, potassium chloride, magnesium chloride, sodium sulfate, potassium sulfate, and magnesium sulfate.

[0175] The concentration of the water-soluble inorganic salt in the calcium carbonate dispersion is preferably 0.5% to 20% by mass, particularly preferably 1% to 10% by mass, relative to the dispersion. If the concentration is too low, independent pores are difficult to form, while if the concentration is too high, it is difficult to obtain a good dispersion when the cellulose acylate solution A and the calcium carbonate dispersion are mixed.

[0176] -Saponification process-

[0177] (5) Next, after sodium hydroxide is added to the cellulose acylate particle dispersion D, 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.

[0178] (6) Next, hydrochloric acid is added to the cellulose particle suspension to adjust the pH of the suspension to near neutral (e.g., in the range of 6.5 to 7), and the cellulose particles are filtered out and washed with an organic solvent. The cellulose particles are then filtered out and washed with pure water repeatedly. After the conductivity of the filtrate reaches 10 μs / cm or less, the filtered cellulose particles are dried.

[0179] Through the above steps, resin particles containing cellulose as the main component are obtained.

[0180] In this method for producing resin particles, cellulose acylate liquid B is added to a mixed solution of carboxymethyl cellulose, a water-soluble organic solvent B, and water, and the mixture is stirred. When oil droplets containing cellulose acylate are formed, water droplets are enclosed within the oil droplets. Thus, the formed cellulose acylate particles contain water droplets. By drying these cellulose acylate particles, the water within the particles evaporates, forming independent pores within the resulting resin particles.

[0181] Furthermore, the average major diameter of the independent pores and the porosity formed by the independent pores can be controlled by mechanical conditions such as the type of solvent, the concentration of the cellulose acylate solution A, the salt concentration of the cellulose acylate solution B, the viscosity of the cellulose acylate solution B, the interfacial tension between the oil phase and the aqueous phase, and the stirring during the preparation of the cellulose acylate solution C.

[0182] In order to obtain resin particles having a volume average particle size within the above-mentioned range, for example, the type of solvent in the cellulose acylate solution A and the concentration of cellulose acylate are adjusted.

[0183] Furthermore, when obtaining resin particles containing cellulose acylate as the main component, the following methods can be used: a method in which cellulose acylate particles are obtained in the granulation step without performing a saponification step; a method in which the amount of sodium hydroxide is reduced in the saponification step to reduce the degree of saponification; etc. By reducing the amount of sodium hydroxide in the saponification step, the degree of substitution of the cellulose acylate can be adjusted.

[0184] -Intermediate layer formation process and coating layer formation process-

[0185] When obtaining resin particles having a coating layer and an intermediate layer, the method for producing resin particles according to the present embodiment includes an intermediate layer forming step and a coating layer forming step after the saponification step.

[0186] First, an aqueous dispersion is prepared in which resin particles obtained through a saponification step (hereinafter referred to as "master particles") are dispersed. Prior to preparing the aqueous dispersion, the master particles are preferably washed with an acid.

[0187] Next, the aqueous dispersion containing the masterbatch and the aqueous solution containing the intermediate material constituting the intermediate layer are mixed. This allows the intermediate layer to be formed, for example, through a reaction between the hydroxyl groups of the cellulose contained in the masterbatch and the carboxyl groups, amino groups, etc. of the intermediate material constituting the intermediate layer, or through hydrogen bonding between the hydroxyl groups. This operation is not performed if the intermediate layer has not yet formed.

[0188] Then, after heating the aqueous dispersion in which the master particles forming the intermediate layer are dispersed, the coating material constituting the coating layer is added and stirred to form the coating layer.

[0189] Here, when forming the coating layer, the coating amount of the coating layer is controlled by the heating temperature, the amount of coating material added, the time of adding the coating material, and the stirring time after adding the coating material.

[0190] The coated resin particles are then removed from the mixed liquid. Removal of the coated resin particles can be accomplished, for example, by filtering the mixed liquid. The removed coated resin particles are preferably washed with water. This removes any unreacted coating material. The coated resin particles are then dried to obtain the resin particles of this embodiment.

[0191] - External Addition Process -

[0192] External additives may be added to the obtained resin particles.

[0193] Examples of the external addition step include a treatment of adding an external additive to cellulose particles using a mixer mill, a V-blender, a Henschel mixer, a Lödige mixer, or the like.

[0194] <Application>

[0195] Examples of applications of the resin particles of this embodiment include cosmetics, coatings, rolling agents, abrasives, scrubbing agents, display spacers, bead molding materials, light-diffusing particles, resin reinforcing agents, refractive index control agents, biodegradation accelerators, fertilizers, water-absorbing particles, toner particles, and anti-caking particles.

[0196] <Cosmetics>

[0197] The cosmetic according to the present embodiment is a cosmetic containing the resin particles according to the present embodiment, and examples thereof include skin cleansers and cosmetics described in Japanese Patent Application Laid-Open No. 2014-221743 or Japanese Patent Application Laid-Open No. 2023-150333.

[0198] The dosage form or format of the cosmetic of this embodiment is not particularly limited, and examples thereof include powder, liquid, and solid.

[0199] The cosmetic of this embodiment may be any of aqueous, oily, water-in-oil emulsions, oil-in-water emulsions, non-aqueous emulsions, W / O / W multiple emulsions, O / W / O multiple emulsions, and the like.

[0200] The main formulation types of the cosmetic of this embodiment include liquid, cream, aerosol, ointment, emulsified solid, stick, and emulsified stick.

[0201] The use of the cosmetic of the present embodiment is not particularly limited, and examples thereof include skin care cosmetics, hair care cosmetics, makeup cosmetics, UV protection cosmetics, antiperspirants, cleansers, and the like.

[0202] Examples of skin care cosmetics include lotions, emulsions, creams, makeup removers, oily liquids, hand creams, lip balms, and wrinkle-covering skin care cosmetics.

[0203] Examples of the hair care cosmetics include shampoo, conditioner, hair rinse, hair cream, cuticle repairing agent, and hairspray.

[0204] Examples of cosmetics include primers, concealers, face powders, powder foundations, liquid foundations, cream foundations, oil-based foundations, blushers, eye shadows, mascara, liquid eyeliners, eyebrow pencils, lipsticks, and nail products.

[0205] Examples of UV protection cosmetics include sunscreen oils, sunscreen lotions, sunscreen creams, sunscreen milks, and sunscreens.

[0206] In particular, the cosmetic of the present embodiment is preferably a makeup cosmetic because it suppresses dullness of the makeup when the sebum is moist and has excellent soft-focus properties.

[0207] When the cellulose particles of this embodiment are incorporated into cosmetics, the amount thereof is not particularly limited. For example, the cellulose particles of this embodiment are appropriately incorporated within a range of 0.01% by mass to less than 100% by mass relative to the cosmetic. The dosage form, intended use, optional ingredients, and the amount of optional ingredients incorporated into the cosmetic are not particularly limited, and known substances can be appropriately selected. The optional ingredients are listed below. These optional ingredients can be used alone or in combination of two or more.

[0208] (1) UV absorbers

[0209] The ultraviolet absorber is not particularly limited as long as it is a raw material that can be incorporated into cosmetics.Specifically, oxybenzone-1 (ingredient name (INCI: Benzophenone-1)), oxybenzone-2 (ingredient name (INCI: Benzophenone-2)), oxybenzone-3 (ingredient name (INCI: Benzophenone one-3), Oxybenzone-4 (INGREDIENT NAME (INCI: Benzophenone-4)), Oxybenzone-5 (INGREDIENT NAME (INCI: Benzophenone-5)), Oxybenzone-6 (INGREDIENT NAME (INCI: Benzophenone-6)), Oxybenzone-9 (INGREDIENT NAME (INCI: Benzophenone-9)), Trimethylcyclohexyl Salicylate, Octocrylene, T-Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Polysilicone-15, Ethylhexyl Dimethoxybenzylidene Dioxoimidazolidine Propionate (INGREDIENT NAME (INCI: Terephthalylidene DicamphorSulfonic Acid) Acid), Ethylhexyl Triazone, Isopentyl Trimethoxycinnamate Trisiloxane (INCI: Isopentyl Trimethoxycinnamate Trisiloxane), Drometrizole Trisiloxane, Ethylhexyl Dimethyl PABA (INCI: Ethylhexyl Dimethyl PABA), Isopropyl Methoxycinnamate (INCI: Isopropyl Methoxycinnamate), Ethylhexyl Methoxycinnamate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Phenylbenzimidazole Sulfonic Acid (INCI: Phenylbenzimidazole Sulfonic Acid), Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Glyceryl Ethylhexanoate Dimethoxycinnamate (INCI: Glyceryl Ethylhexanoate Dimethoxycinnamate), Glyceryl PAB A ester, diisopropyl methyl cinnamate (ingredient name (INCI: DiisopropylMethylCinnamate)), cinoxate, ethylhexyl dimethoxybenzylidenedioxoimidazolidine propionate (ingredient name (INCI: Ethylhe xyl DimethoxybenzylideneDioxoimidazolidine Propionate)), etc.

[0210] (2) Oil

[0211] The oil may be solid, semisolid or liquid. For example, natural animal and plant oils and fats, semi-synthetic oils, hydrocarbon oils, higher fatty acids, higher alcohols, esters, silicone oils and fluorine-based oils may be used.

[0212] Natural animal and plant oils and semi-synthetic oils

[0213] Examples of natural plant and animal oils and semi-synthetic oils include avocado oil (INCI: Persea Gratissima (Avocado) Oil), linseed oil (INCI: Linum Usitatissimum (Linseed) Seed Oil), sweet almond oil (INCI: Prunus Amygdalus Dulcis (Sweet Almond) Oil), perilla seed oil, olive oil (INCI: Olea Europaea (Olive) Fruit Oil), torreya californica oil (INCI: Torreya caliifornica (California Nutmeg) Oil), citronella oil (INCI: Cymbopogon Nardus (Citronella) Oil), torreya japonensis seed oil (INCI: Torreya Nucifera Seed Oil), and apricot kernel oil (INCI: Kyounin Yu)), wheat germ oil (INCI: Triticum Vulgare (Wheat) Germ Oil), sesame seed oil (INCI: Sesamum Indicum (Sesame) Seed Oil), rice germ oil (INCI: Oryza Sativa (Rice) Germ Oil), rice bran oil (INCI: Oryza Sativa (Rice) Bran Oil), camellia oil (INCI: Camellia Kissi Seed Oil), safflower oil (INCI: Carthamus Tinctorius (Safflower) Seed Oil), soybean oil (INCI: Glycine Soja (Soybean) Oil), tea seed oil (INCI: Camellia Sinensis Seed Oil), camellia seed oil (INCI: Camellia Japonica Seed Oil), evening primrose oil (INCI: Oenothera Biennis (Evening Primrose) Oil), rapeseed oil (ingredient name (INCI: RAPE SHUSHI YU)), corn germ oil (ingredient name (INCI: Zea Mays (Corn) Germ Oil)), peach kernel oil (ingredient name), palm oil (ingredient name (INCI: ElaeisGuineensis (Palm) Oil), Palm Kernel Oil (INCI: Elaeis Guineensis (Palm) Kernel Oil), Castor Oil (INCI: Ricinus Communis (Castor) Seed Oil), Sunflower Seed Oil (INCI: Helianthus Annuus (Sunflower) Seed Oil), Grape Seed Oil (INCI: Vitis Vinifera (Grape) Seed Oil), Jojoba Seed Oil (INCI: Simmondsia Chinensis (Jojoba) Seed Oil), Macadamia Ternifolia Seed Oil (INCI: Macadamia Ternifolia Seed Oil), Limnanthes Alba (Meadowfoam) Seed Oil, Cottonseed Oil (INCI: Gossypium Herbaceum (Cotton) Seed Oil), Coconut Oil (INCI: Coco Nucifera (Coconut) Oil), peanut oil (ingredient name (INCI: Arachis Hypogaea (Peanut) Oil)), natural plant oils, shark liver oil (ingredient name (INCI: Shark Liver Oil)), cod liver oil (ingredient name (INCI: Cod Liver Oil)), cod liver oil (ingredient name (INCI: Fish Liver Oil)), turtle oil (ingredient name (INCI: Turtle Oil)), mink oil (ingredient name (INCI: Mink Oil)), egg yolk oil (ingredient name (INCI: Egg Oil)), semi-synthetic oils, etc.

[0214] Hydrocarbon oil

[0215] Examples include olefin oligomers, isoparaffins such as (C13, 14) isoparaffin, isododecane, undecane, dodecane, isohexadecane, hydrogenated polyisobutene (ingredient name (INCI: Hydrogenated Polyisobutene)), squalane (INCI), mineral oil, coconut alkanes, (C13-15) alkanes, and petrolatum (ingredient name (INCI: Petrolatum).

[0216] Higher fatty acids

[0217] Examples of higher fatty acids include oleic acid (ingredient name (INCI: Oleic Acid)), linoleic acid (ingredient name (INCI: Linoleic Acid)), linolenic acid (ingredient name (INCI: Linolenic Acid)), arachidonic acid (ingredient name (INCI: Arachidonic Acid)), eicosapentaenoic acid (ingredient name (INCI: Eicosapentaenoic Acid)), docosahexaenoic acid (ingredient name (INCI: Docosahexaenoic Acid)), isostearic acid (ingredient name (INCI: Isostearic Acid)), and hydroxystearic acid (ingredient name (INCI: Hydroxystearic Acid)).

[0218] Higher alcohols

[0219] Examples of the higher alcohols include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, oleyl alcohol, isostearyl alcohol, octyldodecanol, cholesterol, phytosterols, and batyl alcohol.

[0220] ·Ester oil

[0221] Examples of the ester oil include diisobutyl adipate (ingredient name (INCI: Diisobutyl Adipate)), dihexyldecyl adipate (ingredient name (INCI: Diheptylundecyl Adipate)), and isostearyl isostearate (ingredient name (INCI: Isostearyl Isostearate)), N-alkyl glycol monoisostearate, isocetyl isostearate (ingredient name (INCI: Isocetyl Isostearate)), trimethylolpropane triisostearate (ingredient name (INCI: Trimethylolpropane Triisostearate)), ethylene glycol diethylhexanoate (ingredient name (INCI: Glycol Diethylhexanoate)), cetyl ethylhexanoate (ingredient name (INCI: Cetyl Ethylhexanoate)), and trimethylolpropane triethylhexanoate (ingredient name (INCI: Trimethylolpropane Triisostearate). Octyldodecyl esters, such as octyldodecyl oleate (INCI: Oleyl Oleate), octyldodecyl oleate (INCI: Octyldodecyl Oleate), decyl oleate (INCI: Decyl Oleate), neopentyl glycol diethylhexanoate (INCI: Neopentyl Glycol Diethylhexanoate), neopentyl glycol dicaprate (INCI: Neopentyl Glycol Dicaprate), diisostearyl malate (INCI: Diisostearyl Malate), triethyl citrate (INCI: Triethyl Citrate) Citrate), Diethylhexyl Succinate (INCI: Diethylhexyl Succinate), Amyl Acetate (INCI: Amyl Acetate), Ethyl Acetate (INCI: Ethyl Acetate), Butyl Acetate (INCI: Butyl Acetate)Acetate), Isocetyl Stearate (INCI: Isocetyl Stearate), Butyl Stearate (INCI: ButylStearate), Diisopropyl Sebacate (INCI: Diisopropyl Sebacate), Diethylhexyl Sebacate (INCI: Diethylhexyl Sebacate), Cetyl Lactate (INCI: Cetyl Lactate), Myristyl Lactate (INCI: Myristyl Lactate), Isononyl Isononanoate (INCI: Isononyl Isononanoate), Isotridecyl Isononanoate (INCI: Isotridecyl Isononanoate), Isopropyl Palmitate (INCI: Isopropyl Palmitate), Ethylhexyl Palmitate (INCI: Ethylhexyl Isopalmitate), Hexyldecyl Palmitate (INCI: Isocetyl Palmitate, Hexyldecyl Palmitate), Cholesteryl Hydroxystearate (INCI: Cholesteryl Hydroxystearate), Isopropyl Myristate (INCI: IsopropylMyristate), Octyldodecyl Myristate (INCI: Octyldodecyl Myristate), Myristyl Myristate (INCI: Myristyl Myristate), Ethylhexyl Laurate (INCI: Ethylhexyl Laurate), Hexyl Laurate (INCI: Hexyl Laurate), Dioctyldodecyl Lauroyl Glutamate (INCI: Dioctyldodecyl Lauroyl Glutamate), Isopropyl Lauroyl Sarcosinate (INCI: Isopropyl Lauroyl Sarcosinate)) etc.

[0222] Among the ester oils, examples of the glyceride oil include triethylhexanoin (INCI), caprylic / capric triglyceride (ingredient name (INCI: Caprylic / Capric Triglyceride)), cocoglycerides (INCI), caprylic / capric / succinic triglyceride (ingredient name (INCI: Caprylic / Capric / Succinic Triglyceride)), and caprylic / capric glycerides (ingredient name (INCI: Caprylic / Capric Glycerides)).

[0223] Silicone oil

[0224] Examples of silicone oils include dimethicone, trisiloxane, methyl trimethicone, ethyl trisiloxane, ethyl methicone, alkyl-modified silicones such as hexyl dimethicone, long-chain alkyl-modified silicones such as octyl methicone, phenyl trimethicone, diphenyl dimethicone, diphenylsiloxyphenyl trimethicone, tetraphenyl dimethyl disiloxane, and methyl hydrogen polysiloxane.

[0014] The present invention also includes, but is not limited to, linear or branched organopolysiloxanes of low to high viscosity such as polysiloxane (e.g., cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane), cyclic organopolysiloxanes such as cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane, amino-modified organopolysiloxanes such as amodimethylsiloxane and aminopropylpolydimethylsiloxane, pyrrolidone-modified organopolysiloxanes such as PCA polydimethylsiloxane, pyrrolidonecarboxylic acid-modified organopolysiloxane, silicone rubbers such as colloidal dimethylpolysiloxane with a high degree of polymerization, colloidal amino-modified organopolysiloxane, and colloidal dimethylsiloxane-methylphenylsiloxane copolymers, low-viscosity organopolysiloxane solutions of silicone gums and rubbers, amino-acid-modified silicones, fluorine-modified silicones, silicone resins, and dissolved silicone resins.

[0225] Fluorine-based oil

[0226] Examples of the fluorine-based oil include perfluorodecalin, perfluorononylpolydimethylsiloxane, and perfluoromethylcyclopentane.

[0227] (3) Compounds with alcoholic hydroxyl groups

[0228] Examples of compounds having an alcoholic hydroxyl group include lower alcohols preferably having 2 to 5 carbon atoms, such as ethanol (ingredient name (INCI: Alcohol)) and isopropyl alcohol (ingredient name (INCI: Isopropyl Alcohol)), and sugar alcohols such as sorbitol, maltose, and xylitol. Other examples include cholesterol, sitosterol (ingredient name (INCI: Beta-Sitosterol)), phytosterols, and sterols such as lanosterol.

[0229] (4) Surfactants

[0230] The surfactant includes nonionic, anionic, cationic and amphoteric surfactants, but is not particularly limited and any surfactant used in general cosmetics can be used.

[0231] (5) Powder

[0232] Examples of the powder include coloring pigments, inorganic powders, metal powders, organic powders, inorganic / organic composite powders, etc. Specifically, they are as follows.

[0233] Coloring pigments

[0234] The coloring pigment is not particularly limited as long as it is a pigment commonly used for coloring cosmetics, and any of the following can be used: red iron oxide (ingredient name (INCI: Iron Oxides)), yellow iron oxide (ingredient name (INCI: Iron Oxides)), white titanium dioxide (ingredient name (INCI: Titanium Dioxide)), black iron oxide (ingredient name (INCI: Iron Oxides)), ultramarine (ingredient name (INCI: Ultramarines)), ferric ferrocyanide (ingredient name (INCI: Ferric Ferrocyanide, Ferric Ammonium Ferrocyanide)), manganese violet (ingredient name (INCI: Manganese Violet)), cobalt titanate (ingredient name (INCI: Cobalt Titanium Oxide)), chromium hydroxide (ingredient name (INCI: Chromium Hydroxide Green)), chromium oxide (ingredient name (INCI: Chromium Oxide Greens)), (Al / cobalt oxide) (ingredient name (INCI: Cobalt Aluminum) Composites doped with different metals, such as (iron oxide), (titanium / titanium dioxide) sintered product (INCI: Titanium / Titanium Dioxide), (Li / Cobalt) titanate (INCI: Lithium Cobalt Titanate), (iron oxide / titanium oxide) sintered product (INCI: Iron Oxides, Titanium Dioxide), and titanium dioxide-doped iron oxide (INCI: Iron Oxides, Titanium Dioxide), inorganic brown pigments such as titanium nitride (INCI: Titanium Nitride), ferrous hydroxide (INCI: Iron Hydroxide), and γ-iron oxide, inorganic yellow pigments such as loess, pigments obtained by laking tar-based pigments, and pigments obtained by laking natural pigments, etc.

[0235] The shape of the pigment may be any shape such as spherical, substantially spherical, rod-shaped, spindle-shaped, petal-shaped, strip-shaped, or irregular, and its geometric form is not particularly limited as long as it can impart color to the cosmetic.

[0236] Inorganic powder

[0237] Examples of the inorganic powder include fine particles composed of zirconium dioxide (ingredient name (INCI: Zirconium Dioxide)), zinc oxide (ingredient name (INCI: Zinc Oxide)), cerium oxide (ingredient name (INCI: Cerium Oxide)), magnesium oxide (ingredient name (INCI: Magnesium Oxide)), barium sulfate (ingredient name (INCI: Barium Sulfate)), calcium sulfate (ingredient name (INCI: Calcium Sulfate)), magnesium sulfate (ingredient name (INCI: Magnesium Sulfate)), calcium carbonate (ingredient name (INCI: Calcium Carbonate)), magnesium carbonate (ingredient name (INCI: Magnesium Carbonate)), talc, mica, kaolin, synthetic fluorphlogopite (ingredient name (INCI: Synthetic Fluorphlogopite), synthetic phlogopite iron, biotite (ingredient name (INCI: Biotite), potassium silicate (ingredient name (INCI: Potassium Silicate), Silica, Al Silicate (Ingredient Name (INCI: Aluminum Silicate), Mg Silicate (Ingredient Name (INCI: Magnesium Silicate)), Silicic Acid (Al / Mg) (Ingredient Name (INCI: Magnesium Aluminum Silicate)), Calcium Silicate (Ingredient Name (INCI: Calcium Silicate)), Silicic Acid (Al / Ca / Na) (Ingredient Name (INCI: Aluminum Calcium Sodium Silicate)), Silicic Acid (Li / Mg / Na) (Ingredient Name (INCI: Lithium Magnesium Sodium Silicate)), Silicic Acid (Na / Mg) (Ingredient Name (INCI: Sodium Magnesium Silicate)), Borosilicate (Ca / Al) (Ingredient Name (INCI: Calcium Aluminum Borosilicate)), Borosilicate (Ca / Na) (Ingredient Name (INCI: Calcium Sodium Borosilicate)), Hydroxyapatite, Bentonite, Montmorillonite, Hectorite, Zeolite, Aluminum, Al Hydroxide (Ingredient Name (INCI: Aluminum Hydroxide), boron nitride (ingredient name (INCI: Boron Nitride)), glass (ingredient name (INCI: Glass)), etc.

[0238] Inorganic colored pearlescent pigments include the following, which are not particularly limited, whether untreated or subjected to a known surface treatment commonly used in cosmetics: pearlescent pigments such as mica coated with titanium dioxide (ingredient name (INCI: Titanium Dioxide)), synthetic fluorphlogopite coated with titanium dioxide (ingredient name (INCI: Synthetic Fluorphlogopite), or bismuth oxychloride (ingredient name (INCI: Bismuth Oxychloride), bismuth oxychloride coated with titanium dioxide (ingredient name (INCI: Titanium Dioxide)), talc coated with titanium dioxide (ingredient name (INCI: Titanium Dioxide), fish scale foil (ingredient name), and colored mica coated with titanium dioxide (ingredient name (INCI: Titanium Dioxide)).

[0239] Metal powder

[0240] Examples of the metal powder include metal fine particles composed of Al (ingredient name (INCI: Aluminum, Aluminum Powder)), copper (ingredient name (INCI: Copper Powder)), silver (ingredient name (INCI: Silver Powder)), and gold (ingredient name (INCI: Gold)).

[0241] Organic powder

[0242] Examples of organic powders include powders composed of silicone, polyamide, polyacrylic acid / acrylate, 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, and the like.

[0243] In addition, examples of organic powders include organic pigments, and specific examples include Red 3, Red 104 (1) (ingredient name (INCI: Red 28, Red 28 Lake)), Red 106, Red 201 (ingredient name (INCI: Red 6)), Red 202 (ingredient name (INCI: Red 7)), Red 204, Red 205, Red 220 (ingredient name (INCI: Red 34)), Red 226 (ingredient name (INCI: Red 30)), Red 227 (ingredient name (INCI: Red 33, RED 33 Lake)), Red 228 (ingredient name (INCI: Red 36)), Red 230 (1) (ingredient name (INCI: Red 22, Red 22 Lake)), Red 230 (2) (ingredient name), Red 401, Red 505, Yellow 4 (ingredient name (INCI: Yellow 5)), Yellow 5 (ingredient name (INCI: Yellow 6, Yellow 6 Lake)), Yellow 202 (1) (ingredient name (INCI: Yellow 8)), Yellow 203 (ingredient name (INCI: Yellow 10, Yellow 10 Lake)), Yellow 204 (ingredient name (INCI: Yellow 11)), Yellow 401, Blue 1 (ingredient name (INCI: Blue 1, Blue 1 Lake)), Blue 2, Blue 201, Blue 205 (ingredient name (INCI: Blue 4)), Blue 404, Green 3 (ingredient name (INCI: Green 3, Green 3 Lake)), Green 201 (ingredient name (INCI: Green 5)), Green 202 (ingredient name (INCI: Green 6)), Green 204 (ingredient name (INCI: Green 8)), Green 205, Orange 201 (ingredient name (INCI: Orange 5), Orange 203 (Ingredient Name (INCI: Pigment Orange 5)), Orange 204 (Ingredient Name), Orange 205 (Ingredient Name (INCI: Orange 4, Orange 4Lake)), Orange 206 (Ingredient Name (INCI: Orange 10)), Orange 207 (Ingredient Name (INCI: Orange 11)), etc., cochineal, lac acid (Ingredient Name (INCI: Laccaic Acid)), safflower red (Ingredient Name (INCI: Carthamus Tinctorius (Safflower) Flower Extract)), ginkgo root extract (Ingredient Name (INCI: Lithospermum Officinale Root Extract)), gardenia yellow, gardenia blue (Ingredient Name (INCI: HydrolyzedGardenia Florida Extract) and other natural pigments.

[0244] Inorganic / organic composite powder

[0245] Examples of the inorganic / organic composite powder include composite powders obtained by coating the surface of an inorganic powder with an organic powder by a known and commonly used method.

[0246] The above-mentioned powders may also be powders that have been surface-treated. The hydrophobicity-imparting agent is not particularly limited, and examples thereof include silicone treatment agents, waxes, paraffins, organic fluorine compounds such as perfluoroalkyl and phosphate compounds, surfactants, amino acids such as N-acylglutamic acid, and metal soaps such as aluminum stearate and magnesium myristate.

[0247] (6) Film-forming agent

[0248] As the film-forming agent, trimethylsiloxysilicic acid, acrylic-silicone film-forming agent, silicone-modified norbornene, silicone-modified pullulan, etc. can be used.

[0249] (7) Antiperspirants

[0250] Antiperspirants are not particularly limited as long as they are ingredients that suppress sweat production by astringing the skin, and a wide range of general-purpose ingredients can be used. Examples include aluminum chlorohydrate, aluminum hydroxyhalides such as aluminum chlorohydrate, aluminum halides such as aluminum chloride, aluminum aluminum salts, tannic acid, persimmon tannin, potassium aluminum sulfate, zinc oxide, zinc p-phenolsulfonate, pyroalum, tetrachloro(Al / zirconium) hydrate, and trichlorohydrated glycine (Al / zirconium).

[0251] (8) Antimicrobial agents

[0252] As antibacterial agent, for example, triclosan, benzalkonium chloride, benzethonium chloride, chlorhexidine hydrochloride, chlorhexidine gluconate, halocarban, isomethylphenol and other antibacterial agents are generally utilized. In addition, green tea dry distillation extract and other essential oils or extracts derived from Chinese medicine and other essential oils or extracts with antibacterial properties can also be coordinated. As antibacterial agents with deodorizing effects as essential oils or extracts derived from Chinese medicine, for example, green tea extract, lavender extract, scutellaria extract, coptis extract, phellodendron extract, capillaris extract, aloe barbadensis extract, sophora flavescens root extract, ursinus ursinus leaf extract, garlic extract, witch hazel extract, black tea extract, sage leaf extract, sansho pepper extract, ginger root extract, calamus root extract, hedera helix extract, houttuynia cordata extract, peach fruit extract, peach leaf extract, peppermint leaf extract, ligusticum chuanxiong root extract, eucalyptus globulus leaf extract, peanut seed coat extract, red ganoderma extract, sanguisorba officinalis root extract, etc. can be used. Plant extracts can be used one or mixed with two or more.

[0253] (9) Other additives

[0254] Other additives include oil-soluble gelling agents, ultraviolet light absorbing and scattering agents, moisturizing agents, preservatives, fragrances, salts, antioxidants, pH adjusters, chelating agents, cooling agents, anti-inflammatory agents, skin-beautifying ingredients (whitening agents, cell activators, rough skin improvers, blood circulation promoters, skin astringents, anti-seborrheic agents, etc.), vitamins, amino acids, nucleic acids, hormones, inclusion compounds, etc.

[0255] Oil-soluble gelling agent

[0256] Examples of the oil-soluble gelling agent include metal soaps such as aluminum stearate, magnesium stearate, and zinc myristate; amino acid derivatives such as lauroyl glutamic acid (ingredient name (INCI: Lauroyl Glutamic Acid)) and α- and γ-di-n-butylamine; dextrin palmitate (ingredient name (INCI: Dextrin Palmitate)), dextrin isostearate (ingredient name (INCI: Dextrin Isostearate)), dextrin myristate (ingredient name (INCI: Dextrin Myristate)), stearoyl inulin (ingredient name (INCI: Stearoyl Inulin)), dextrin palmitate / ethylhexanoate (ingredient name (INCI: Dextrin Palmitate / Ethylhexanoate) and other dextrin fatty acid esters; sucrose fatty acid esters such as sucrose palmitate and sucrose stearate; oligofructose fatty acid esters such as oligofructose stearate and oligofructose 2-ethylhexanoate; benzyl derivatives of sorbitol such as monobenzylidene sorbitol and dibenzylidene sorbitol; disteardimethylammonium hectorite, stearalkonium hectorite, organically modified clay minerals of hectorite; stearalkonium bentonite, etc.

[0257] UV absorbing and scattering agents

[0258] Examples of ultraviolet absorbing and scattering agents include particles that absorb and scatter ultraviolet light, such as fine-particle titanium dioxide, fine-particle iron-containing titanium dioxide, fine-particle zinc oxide, fine-particle cerium oxide, and composites thereof. Dispersions prepared by pre-dispersing these particles that absorb and scatter ultraviolet light in an oil may also be used.

[0259] Moisturizer

[0260] Examples of moisturizing agents include polyols such as BG (ingredient name (INCI: Butylene Glycol)), PG (ingredient name (INCI: Propylene Glycol)), DPG (ingredient name (INCI: Dipropylene Glycol)), pentylene glycol, 1,10-decanediol, caprylyl glycol, 1,2-hexanediol, erythritol, glycerin, diglycerin, and polyethylene glycol; and glucose, glyceryl glucoside, betaine, chondroitin sulfate sodium (ingredient name (INCI: Sodium Chondroitin Sulfate)), PCA-Na (ingredient name (INCI: Sodium PCA)), methyl gluceth-10, methyl gluceth-20, hyaluronic acid, egg yolk lecithin, soybean lecithin, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, and sphingomyelin.

[0261] ·preservative

[0262] 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, phenolic acid, sorbic acid, alkyl parahydroxybenzoates, parachlorometrocresol, hexachlorophene, triclocarban, photosensitizer, and phenoxyethanol.

[0263] ·spices

[0264] Fragrances include natural and synthetic fragrances. Natural fragrances include plant-derived fragrances isolated from flowers, leaves, tree trunks, and fruit peels, as well as animal-derived fragrances such as musk and civet. Synthetic fragrances include hydrocarbons such as monoterpenes, alcohols such as aliphatic alcohols and aromatic alcohols, aldehydes such as terpenoids and aromatic aldehydes, ketones such as alicyclic ketones, esters such as terpene esters, lactones, phenols, oxides, nitrogen-containing compounds, and acetals.

[0265] Salts

[0266] Examples of salts include inorganic salts, organic acid salts, amine salts, and amino acid salts. Examples of inorganic salts include sodium, potassium, magnesium, calcium, aluminum, zirconium, 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 and amino acid salts include salts of amines such as triethanolamine and salts of amino acids such as glutamic acid. Furthermore, salts of hyaluronic acid, chondroitin sulfate, aluminum zirconium glycinate complexes, and neutralized acid-base salts used in cosmetic formulations can also be used.

[0267] Antioxidants

[0268] The antioxidant is not particularly limited, and examples thereof include carotenoids, ascorbic acid and salts thereof, ascorbyl stearate, tocopherol, tocopheryl acetate, p-tert-butylphenol, butylated hydroxyanisole, butylated hydroxytoluene, phytic acid, ferulic acid, thiotaurine, hypotaurine, sulfites, isoascorbic acid and salts thereof, chlorogenic acid, epicatechin, epigallocatechin, epigallocatechin gallate, apigenin, kaempferol, myricetin, quercetin, etc. The antioxidant may be used alone or in combination of two or more.

[0269] pH adjuster

[0270] Examples of the pH adjuster include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium bicarbonate, and ammonium bicarbonate.

[0271] Chelating agents

[0272] Examples of the chelating agent include alanine, edetate sodium salt, sodium polyphosphate, sodium metaphosphate, and phosphoric acid.

[0273] · Cooling agent

[0274] Examples of the cooling agent include L-menthol and camphor.

[0275] Anti-inflammatory agents

[0276] Examples of the anti-inflammatory agent include allantoin, glycyrrhizic acid and its salts, glycyrrhetinic acid and stearyl glycyrrhetinate, tranexamic acid, and azulene.

[0277] Skin-beautifying ingredients

[0278] Examples of skin-beautifying ingredients include whitening agents such as placenta extract, arbutin, glutathione, and strawberry saxifrage extract; cell activators such as royal jelly, photosensitizers, cholesterol derivatives, and calf blood extract; skin roughness improvers; blood circulation promoters such as vanillylamide, benzyl nicotinate, β-butoxyethyl nicotinate, capsaicin, zingerone, mylabris tincture, ichthyol, caffeine, tannic acid, α-borneol, tocopheryl nicotinate, inositol nicotinate, cyclomandelate, cinnarizine, tolazoline, acetylcholine, verapamil, tetrandrine, and γ-oryzanol; skin astringents such as zinc oxide and tannic acid; and anti-seborrheic agents such as sulfur and dimethylthioxanthine.

[0279] Vitamins

[0280] Examples of vitamins include vitamin A oil, retinol, retinyl acetate, retinyl palmitate and other vitamins, riboflavin, riboflavin tetrabutyrate, flavine adenine nucleotide, nucleotides), vitamin B2 such as pyridoxine hydrochloride, pyridoxine dioctanoate, and pyridoxine tripalmitate, vitamin B6 such as vitamin B12 and its derivatives, vitamin B15 and its derivatives, vitamin C such as L-ascorbic acid, L-ascorbyl dipalmitate, sodium L-ascorbic acid-2-sulfate, and dipotassium L-ascorbyl diester phosphate, vitamin D such as ergocalciferol and cholecalciferol, vitamin E such as α-tocopherol, β-tocopherol, γ-tocopherol, dl-α-tocopheryl acetate, dl-α-nicotinoyl tocopheryl, and dl-α-tocopheryl succinate; niacin such as niacin, benzyl nicotinate, and niacinamide, vitamin H, vitamin P, pantothenic acid such as calcium pantothenate, D-panthenol, panthenyl ethyl ether, and acetylpantothenylethylether, and biotin.

[0281] Amino acids

[0282] Examples of the amino acids include glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, aspartic acid, glutamic acid, cystine, cysteine, methionine, and tryptophan.

[0283] Nucleic acids

[0284] Examples of nucleic acids include deoxyribonucleic acid and the like.

[0285] ·hormone

[0286] Examples of the hormone include estradiol and vinylestradiol.

[0287] Inclusion compounds

[0288] Examples of the inclusion compound include cyclodextrin and the like.

[0289] [Example]

[0290] Hereinafter, examples will be described, but the present invention is not limited by these examples. In the following description, unless otherwise specified, "parts" and "%" are all based on mass.

[0291] <Example 1>

[0292] (Manufacturing of Resin Pellets CP1)

[0293] Granulation process

[0294] 130 parts of cellulose acylate ("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 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.

[0295] The obtained mixed solution was emulsified by a high-speed emulsifier (T25 digital ULTRA-TURRAX, manufactured by IKA) for 8500 min. -1 10 parts of sodium hydroxide was added thereto, and the mixture was stirred at 80°C for 3 hours to remove the organic solvent.

[0296] To the obtained liquid, 10 parts of dilute hydrochloric acid was added, and the residue was filtered. The filtered product was then dispersed in pure water again to obtain a cellulose acylate particle dispersion (solid content concentration: 10%).

[0297] -Saponification process-

[0298] To 500 parts of the resulting cellulose acylate particle dispersion, 17.5 parts of a 20% aqueous sodium hydroxide solution was added, and the mixture was stirred at a saponification temperature of 30°C for 6 hours. After adjusting the pH of the saponified suspension to 7 by adding hydrochloric acid, the resulting cellulose particles were filtered out and repeatedly washed with pure water until the conductivity of the filtrate reached 50 μs / cm or less. The washed cake-like cellulose particles were then re-slurried with pure water to obtain a cellulose particle dispersion (solids concentration 20%).

[0299] -Surface treatment-

[0300] Add 1 part of chitosan lactate to 500 parts of cellulose particle dispersion, stir at room temperature for 5 hours, add 8 parts of sodium stearate as fatty acid salt, and heat to 75°C. Add 65 parts of 5% calcium chloride aqueous solution as saline solution, stir for 20 minutes to form a coating layer. Then, filter and wash the obtained particles repeatedly until the conductivity of the filtrate is 50μs / cm or less. After washing, dry the obtained cake to obtain cellulose particles with a coating layer. In addition, use an FM mixer (FM40, manufactured by Nippon Coke Industries) to mix the obtained particles at a temperature of 25°C for 2000min. -1 The mixture was stirred at a speed of 1 hour to make the surface of the coating layer smooth.

[0301] Through the above steps, resin pellets are obtained.

[0302] <Example 2>

[0303] (Manufacturing of Resin Pellets CP2)

[0304] In the granulation step of the resin pellets CP1, resin pellets CP2 were obtained in the same manner as in the resin pellets CP1 except that the number of parts of CMC was changed as shown in Table 1.

[0305] <Example 3>

[0306] (Manufacturing of Resin Pellets CP3)

[0307] In the production of the resin pellets CP1, resin pellets CP3 were obtained in the same manner as in the resin pellets CP1 except that the saponification step was not performed.

[0308] <Examples 4 to 11>

[0309] (Manufacturing of Resin Pellets CP4 to CP11)

[0310] In the granulation step of the resin pellet CP1, resin pellets CP4 to CP1 were obtained in the same manner as for the resin pellet CP1 except that the following matters were changed according to Table 1.

[0311] ·Amount of ethyl acetate used to dissolve cellulose acylate

[0312] When using a solvent other than ethyl acetate as ethyl acetate to dissolve cellulose acylate, use a mixture of the other solvent and ethyl acetate.

[0313] ·Number of CMC

[0314] When using surfactant, add surfactant and CMC at the same time

[0315] Changing the type and amount of saline solution

[0316] <Example 12>

[0317] (Manufacturing of Resin Pellets CP12)

[0318] In the granulation step of the resin pellets CP1, the cake obtained at the end of the saponification step is dried to obtain resin pellets CP12 that have not been subjected to surface treatment.

[0319] <Example 13>

[0320] (Manufacturing of Resin Pellets CP13)

[0321] In the granulation step of the resin pellets CP1, the same operations as before the saponification step were performed, but the surface treatment was changed as follows to obtain resin pellets CP13.

[0322] -Surface treatment-

[0323] To 500 parts of the cellulose particle dispersion, 1 part of chitosan lactate was added and stirred at room temperature for 5 hours. After adjusting the pH to 6 with the addition of aqueous sodium hydroxide solution, the particles were repeatedly filtered and washed until the filtrate had an electrical conductivity of 50 μs / cm or less. The resulting cake was dried to obtain resin particles CP13.

[0324] Comparative Examples 1 to 4

[0325] (Manufacturing of Resin Pellets CPC1 to CPC4)

[0326] In the granulation step of the resin pellets CP1, resin pellets CPC1 to 4 were obtained in the same manner as for the resin pellets CP1 except that the following matters were changed according to Table 1.

[0327] ·Amount of ethyl acetate used to dissolve cellulose acylate

[0328] When using a solvent other than ethyl acetate as ethyl acetate to dissolve cellulose acylate, use a mixture of the other solvent and ethyl acetate.

[0329] ·Number of parts of sodium sulfate

[0330] ·Number of CMC

[0331] When using surfactant, add surfactant and CMC at the same time

[0332] ·Stirring conditions of high-speed emulsifier in granulation process

[0333] <Comparative Example 5>

[0334] Porous cellulose particles ("CELLULOBE ADS-10" manufactured by Daito Kasei Kogyo Co., Ltd.) were prepared.

[0335] <Comparative Example 6>

[0336] Nylon pellets ("SP-10" manufactured by Toray Industries, Inc.) were prepared.

[0337] <Comparative Example 7>

[0338] Titanium dioxide particles ("Ti-Pure R104" manufactured by Chemours) were prepared.

[0339] <Comparative Example 8>

[0340] Porous cellulose particles ("Celluflow C-25" manufactured by JNR Corporation) were prepared.

[0341] <Evaluation>

[0342] The following evaluations were performed on the pellets of each example.

[0343] (characteristic)

[0344] The various properties of the particles in each example were measured according to the methods described above.

[0345] Volume average particle size of particles (D50v)

[0346] Average length diameter of independent holes

[0347] Porosity due to independent pore formation

[0348] Porosity formed by interconnected pores

[0349] Average roundness of particles

[0350] (Maintaining coverage when wet)

[0351] The disc-shaped aluminum container (approximately 8.5 cm in area) used for foundation cream production 2 ) is painted red on the bottom.

[0352] Next, 1 g of the particles of each example were placed on the bottom of a container and subjected to a pressure of 100 kg / cm 2 Next, two drops of artificial sebum (ARTIFICIAL SEBUM, "D4265-14" from BIOCHEMAZONE) were dropped onto the solidified film to moisten it.

[0353] Then, the degree of transparency and the degree of redness of the wet portion were visually observed according to the following criteria.

[0354] A was not transparent and no red color was observed.

[0355] B was slightly transparent, but no red color was observed.

[0356] C becomes transparent and a red color is observed.

[0357] (Light transmittance and haze)

[0358] 0.5 g of the pellets from each example and 4.5 g of a liquid silicone film-forming agent (Shin-Etsu Chemical Co., Ltd., "KF-7312L") were placed in a 20 mL vial. The mixture was stirred with a rotator for 24 hours and then ultrasonically treated for 2 minutes. The resulting mixture was then applied to a PET film with a 30 μm thickness using an applicator and dried overnight to prepare an evaluation film.

[0359] The total light transmittance and diffuse transmittance of the evaluation film were measured using a haze meter. The haze value was then calculated using the following formula: Haze value = diffuse transmittance / total light transmittance × 100. The evaluation criteria were as follows.

[0360] -Total light transmittance-

[0361] A: More than 86%

[0362] B: 83% or more and less than 86%

[0363] C: 76% or more and less than 83%

[0364] D: less than 76%

[0365] -Haze-

[0366] A: More than 80%

[0367] B: 75% or more and less than 80%

[0368] C: 68% or more and less than 75%

[0369] D: less than 75%

[0370] (Biodegradability)

[0371] The 4-week aerobic biodegradation rate of the granules of each example was measured by a method in accordance with JIS K6950:2000 (ISO 14851:1999). The evaluation criteria are as follows.

[0372] A: Degradation rate is more than 60%

[0373] B: Degradation rate is above 30% and below 60%

[0374] C: Degradation rate less than 30%

[0375] In addition, the details of the abbreviations in Tables 1 and 2 are as follows.

[0376] SANa: Sodium stearate

[0377] SGNa: Sodium Stearoyl Glutamate

[0378] SA / Ca: calcium salt of stearic acid

[0379] SA / Al: Aluminum salt of stearic acid

[0380] SA / Mg: magnesium salt of stearic acid

[0381] SG / Ca: Calcium salt of stearoyl glutamate

[0382] SG / Al: Aluminum salt of stearoyl glutamate

[0383] Tween 85: Polyoxyethylene (20) sorbitan trioleate (Tokyo Chemical Industry Co., Ltd.) [Table 1]

[0384]

[0385] [Table 2]

[0386]

[0387] The above results show that the resin particles of this example have superior shielding properties when wet compared to the particles of the comparative example, and also show that both permeability and haze are achieved.

[0388] This also shows that when the resin particles of this example are applied to cosmetics, the cosmetics can be obtained with excellent soft-focus properties while suppressing dullness of makeup when moistened with sebum.

[0389] Product Reviews

[0390] Using the resin particles CP1 of Example 1 or the resin particles CP12 of Example 12, cosmetic evaluation was performed as follows.

[0391] (W / O sunscreen)

[0392] -W / O sunscreen ingredients-

[0393] Component 1: Resin particles CP1 of Example 1: 1.0 part

[0394] Component 2: Decamethylcyclopentasiloxane (denoted as 1): 12.0 parts

[0395] Component 3: Diphenylsiloxyphenyl trimethicone (note 2): 2.0 parts

[0396] Ingredient 4: Ethylhexyl methoxycinnamate: 7.5 parts

[0397] Ingredient 5: Diethylamino Hydroxybenzoyl Hexyl Benzoate: 2.0 parts

[0398] Component 6: o-Trichloroethylene: 2.5 parts

[0399] Component 7: Cross-linked polyester modified silicone mixture (3): 4.0 parts

[0400] Ingredient 8: Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane (Note 4): 2.0 parts

[0401] Ingredient 9: 1,3-Butanediol: 3.0 parts

[0402] Ingredient 10: Sodium citrate: 0.5 parts

[0403] Ingredient 11: Sodium chloride: 0.5 parts

[0404] Ingredient 12: Ethanol: 5.0 parts

[0405] Ingredient 13: Purified water: 58.0 parts

[0406] (Note 1) KF-995 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0407] (Note 2) KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0408] (Note 3) KSG-210 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0409] (Note 3) KF-6048 Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0410] -Production and Evaluation of W / O Sunscreen-

[0411] Stir and mix the above ingredients 1 to 8 until uniform. Separately, evenly dissolve ingredients 9 to 12 in ingredient 13, then gently add this mixture of ingredients 1 to 8 and stir to form an emulsion. This emulsion is then filled into a predetermined container to obtain a W / O sunscreen.

[0412] The obtained W / O sunscreen had a light touch, did not give an greasy feeling, had good spreadability, and was highly transparent. In addition, a highly water-repellent and uniform film was obtained.

[0413] (O / W sunscreen cream)

[0414] -Composition of O / W sunscreen cream-

[0415] Ingredient 1: Polyglyceryl-5 Stearate (Note 1): 5.0 parts

[0416] Ingredient 2: Cetyl alcohol: 2.0 parts

[0417] Ingredient 3: Butanediol: 3.0 parts

[0418] Ingredient 4: Triethylhexanoin: 7.5 parts

[0419] Ingredient 5: Polyglyceryl-10 decisostearate (note 2): 0.5 parts

[0420] Component 6: Cyclopentasiloxane: 5.0 parts

[0421] Ingredient 7: Mineral oil: 7.5 parts

[0422] Component 8: Cetyl Ethylhexanoate: 7.5 parts

[0423] Ingredient 9: 5.0 parts lipophilic microparticles of titanium dioxide

[0424] Ingredient 10: 1.0 part lipophilic microparticle zinc oxide

[0425] Component 11: Resin particles CP1 of Example 1: 1.0 part

[0426] Ingredient 12: Glyceryl Behenate, Polyglyceryl-6 Octostearate (3): 0.5 parts

[0427] Ingredient 13: Xanthan gum: 0.2 parts

[0428] Ingredient 14: Bentonite (10% water-soluble solution): 5.0 parts

[0429] Ingredient 15: Water: 49.3 parts

[0430] (Note 1) SUNSOFT A-181E-C (manufactured by Taiyo Chemical Co., Ltd.)

[0431] (Note 2) SUNOIL DDI (manufactured by Sun Chemical Co., Ltd.)

[0432] (Note 3) TAISET 50-C (manufactured by Taiyo Chemical Co., Ltd.)

[0433] - Production and Evaluation of O / W Sunscreen Creams -

[0434] • Operation A: Mix ingredients 1 and 15, add ingredients 2 and part of ingredient 3 and mix.

[0435] Procedure B: Mix ingredients 4 to 8, and add ingredients 9 to 11 and ingredient 12 while stirring.

[0436] Operation C: To the mixture obtained in Operation A, the mixture obtained in Operation B is slowly added while stirring.

[0437] Operation D: Add the remaining ingredient 3 and ingredient 13, and mix ingredient 14.

[0438] Operation E: The mixture obtained in Operation D was slowly added to the mixture obtained in Operation C while stirring, and the mixture was stirred to obtain an O / W sunscreen cream.

[0439] The obtained O / W sunscreen cream has light and thin ductility, is moist and non-sticky, has high transparency, and forms a uniform film.

[0440] (Lipstick)

[0441] - Lipstick composition -

[0442] Component 1: Decamethylcyclopentasiloxane: 28.7 parts

[0443] Component 2: Isotridecyl Isononanoate: 10.0 parts

[0444] Ingredient 3: Diisostearyl Malate: 5.0 parts

[0445] Ingredient 4: Candelilla wax: 10.0 parts

[0446] Component 5: Polyethylene: 6.0 parts

[0447] Component 6: Resin particles CP1 of Example 1: 1.0 part

[0448] Ingredient 7: Microcrystalline wax: 2.0 parts

[0449] Component 8: Trimethylsiloxysilicate mixture (note 1): 20.0 parts

[0450] Component 9: (Vinyl Dimethicone / Lauryl Dimethicone) Crosspolymer (Note 2): 5.0 parts

[0451] Component 10: Silicone branched alkyl polyglycerol co-modified silicone (3): 3.0 parts

[0452] Ingredient 11: Colorant: 1.3 parts

[0453] Ingredient 12: Mica: 8.0 parts

[0454] (Note 1) KF-7312J: a mixture of 50% trimethylsiloxysilicate and 50% cyclopentasiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0455] (Note 2) Mixture of KSG-43 (vinyl dimethicone / lauryl dimethicone) crosspolymer and triethylhexanoin (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0456] (Note 3) KF-6115 Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0457] - Lipstick Manufacturing / Evaluation-

[0458] Procedure A: Component 11 is mixed with a portion of component 2, and the mixture is dispersed on a roll mill. The resulting dispersion is then heated and mixed with component 1, the remaining portion of component 2, and components 3 to 12 to obtain a composition.

[0459] Operation B: The composition obtained in Operation A is poured into a mold, cooled and solidified to obtain a stick-shaped lipstick.

[0460] It was found that the obtained lipstick had good spreadability and good and excellent film uniformity.

[0461] (Non-aqueous mousse foundation)

[0462] -Composition of non-aqueous mousse foundation-

[0463] Ingredient 1: (Dimethicone / (PEG-10 / 15)) Crosspolymer (Note 1): 18.00 parts

[0464] Component 2: Polydimethylsiloxane (note 2): 1.00 part

[0465] Component 3: Decamethylcyclopentasiloxane: 11.00 parts

[0466] Ingredient 4: Ethylhexyl methoxycinnamate: 5.00 parts

[0467] Ingredient 5: Jojoba oil: 1.00 parts

[0468] Component 6: Methylsilyl Silicic Anhydride (3): 0.75 parts

[0469] Component 7: KTP-09R (note 4): 0.20 parts

[0470] Component 8: KTP-09Y (note 4): 1.00 part

[0471] Component 9: KTP-09B (note 4): 0.02 parts

[0472] Component 10: KTP-09W (note 4): 5.00 parts

[0473] Ingredient 11: KF-9909 (note 5) treated talc: 11.55 parts

[0474] Component 12: Dissolved trimethylsiloxysilicate (6): 4.00 parts

[0475] Component 13: Decamethylcyclopentasiloxane (note 7): 25.28 parts

[0476] Component 14: Polysilicone-1 Crosspolymer (Note 8): 6.00 parts

[0477] Ingredient 15: Polymethylsilsesquioxane (9): 3.00 parts

[0478] Component 16: Resin pellets CP1 of Example 1: 7.00 parts

[0479] Ingredient 17: Antioxidant: 0.20 parts

[0480] (Note 1) KSG-240 Cyclopentasiloxane + (Dimethicone / (PEG-10 / 15)) Crosspolymer Mixture (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0481] (Note 2) KF-96A (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0482] (Note 3) Surface hydrophobized fumed silica: AEROSIL R-972 (manufactured by AEROSIL Co., Ltd., Japan)

[0483] (Note 4) KF-9909 treated coloring inorganic pigment, W: white, R: red, Y: yellow, B: black (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0484] (Note 5) Triethoxysilylethyl polydimethylsiloxyethylhexyl polydimethylsiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0485] (Note 6) KF-7312J trimethylsiloxysilicate 50% dissolved in cyclopentasiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0486] (Note 7) KF-995 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0487] (Note 8) KSP-411 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0488] (Note 9) KMP-590 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0489] -Production and Evaluation of Non-Aqueous Mousse Foundation-

[0490] Components 1 to 10 were uniformly mixed by roller treatment. Components 11 to 17 were added to the mixture and mixed until uniform, thereby obtaining a non-aqueous mousse-like foundation.

[0491] The resulting foundation was confirmed to have a mousse-like appearance, was firmly solidified, spread lightly, had no sticky or greasy feel, had an excellent feel during use, and had excellent long-lasting makeup.

[0492] (Wash-off mask cosmetics)

[0493] -Composition of washable facial mask cosmetics-

[0494] Ingredient 1: Polydimethylsiloxane (denoted as 1): 3.0 parts

[0495] Component 2: Decamethylcyclopentasiloxane: 3.0 parts

[0496] Component 3: Polyglycerol modified silicone oil (note 2): 2.0 parts

[0497] Ingredient 4: Kaolin: 28.0 parts

[0498] Component 5: Resin particles CP12 of Example 12: 2.0 parts

[0499] Ingredient 6: Carbomer: 0.4 parts

[0500] Ingredient 7: Butanediol: 10.0 parts

[0501] Ingredient 8: Glycerin: 20.0 parts

[0502] Ingredient 9: Preservative: 0.1 part

[0503] Ingredient 10: Spice: 0.1 part

[0504] Ingredient 11: Water: 31.4 parts

[0505] (Note 1) KF-96A (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0506] (Note 2) KF-6105 Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0507] -Manufacturing and Evaluation of Wash-Off Mask Cosmetics-

[0508] Procedure A: Mix ingredients 1 to 3 and ingredient 9.

[0509] Procedure B: After mixing components 6 to 8 and component 11 uniformly, mix and stir components 4, 5, and 10.

[0510] Step C: The mixture obtained in Step A is added to the mixture obtained in Step B and emulsified to obtain a creamy wash-off facial mask cosmetic.

[0511] The obtained washable facial mask cosmetic material is light and thin when applied, has an excellent cleansing effect, and after washing with water, it feels moisturized and non-greasy, leaving the skin hydrated and smooth, with a very excellent feel. In addition, it is also excellent in stability.

[0512] (deodorant stick)

[0513] -Deodorant stick composition-

[0514] Component 1: Aluminum chlorohydrate: 23.00 parts

[0515] Component 2: Decamethylcyclopentasiloxane: 36.50 parts

[0516] Ingredient 3: Stearyl alcohol: 8.00 parts

[0517] Ingredient 4: Talc: 13.88 parts

[0518] Ingredient 5: Spice: 0.10 parts

[0519] Ingredient 6: BHT (butylated hydroxytoluene): 0.02 parts

[0520] Ingredient 7: Paraffin (solid): 2.00 parts

[0521] Ingredient 8: Mineral oil: 14.5 parts

[0522] Component 9: Cross-linked polyester modified silicone mixture (note 1): 1.00 part

[0523] Component 10: Resin pellets CP1 of Example 1: 1.00 part

[0524] (Note 1) KF-6048 Cetyl PEG / PPG-10 / 1 Polydimethylsiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0525] - Manufacturing and Evaluation of Deodorant Sticks -

[0526] Procedure A: Components 2 to 3 and components 6 to 9 are heated, dissolved, and mixed.

[0527] Operation B: Components 1, 4, and 10 are uniformly mixed into the mixture obtained in Operation A, and the mixture is uniformly dispersed and mixed using a mixer.

[0528] • Operation C: Component 5 is added to the mixture obtained in Operation B, and mixed uniformly.

[0529] Operation D: The mixture obtained in Operation C is poured into a mold and allowed to cool and solidify.

[0530] The obtained deodorant stick did not feel excessively dry or sticky, and had an excellent long-lasting deodorizing effect.

[0531] (Skin Cleanser)

[0532] -Composition of skin cleansers-

[0533] Component 1: Resin particles CP1 of Example 1: 1.0 part

[0534] Ingredient 2: Polyquaternium-7 (marked as 1): 0.1 part

[0535] Ingredient 3: Potassium myristate: 20.0 parts

[0536] Ingredient 4: Potassium palmitate: 5.0 parts

[0537] Ingredient 5: Potassium stearate: 5.0 parts

[0538] Ingredient 6: Potassium laurate: 3.0 parts

[0539] Ingredient 7: Glycerin: 25.0 parts

[0540] Ingredient 8: PEG-6(H(OCH2CH2) n OH (n = average 6)): 5.0 parts

[0541] Ingredient 9: PEG-32(H(OCH2CH2) n OH (n = average 32)): 5.0 parts

[0542] Ingredient 10: Sorbitol: 5.0 parts

[0543] Ingredient 11: Glycosyl trehalose (note 2): 2.0 parts

[0544] Ingredient 12: Glyceryl Stearate: 1.5 parts

[0545] Ingredient 13: Kaolin: 1.0 part

[0546] Ingredient 14: Phytosteryl Isostearate: 0.5 parts

[0547] Ingredient 15: Sodium Methyl Cocoyl Taurate: 1.0 part

[0548] Ingredient 16: Hydrogenated starch hydrolysate: 1.2 parts

[0549] Ingredient 17: Water: 18.7 parts

[0550] (Note 1) MERQUAT 550 (manufactured by Lubrizol)

[0551] (Note 2) Tornare (made by Hayashibara Co., Ltd.)

[0552] -Manufacturing and Evaluation of Skin Cleansers-

[0553] The above ingredients 1 to 17 were mixed using a homomixer to prepare a skin cleanser.

[0554] The obtained skin cleanser was used to make a foaming facial cleanser. After washing the face, it was found that the face felt refreshed and had a moderate moisturizing feeling.

[0555] (Powder Foundation)

[0556] -Composition of powder foundation-

[0557] [Table 3]

[0558] powder foundation

[0559]

[0560] - Manufacturing and Evaluation of Powder Foundation -

[0561] The ingredients shown in Table 3 were molded using a metal plate press to obtain a powder foundation.

[0562] Apply the resulting powder foundation to the inside of your wrist with a powder puff. It will feel smooth and moist.

[0563] (Note) (((1)))

[0565] A resin particle having closed pores therein, wherein the volume average particle size is 1 μm to 30 μm inclusive, the average major diameter of the closed pores is 0.1 μm to 2.0 μm inclusive, and the porosity formed by the closed pores is 1% to 40% inclusive. (((2)))

[0567] The resin pellets according to (((1))), comprising a biodegradable resin as a main component. (((3)))

[0569] The resin particles according to (((2))), wherein the biodegradable resin is cellulose. (((4)))

[0571] The resin particles according to any one of (((1))) to (((3))), wherein

[0572] The average major diameter of the independent pores is 0.1 μm or more and 1.5 μm or less. (((5)))

[0574] The resin particles according to any one of (((1))) to (((4))), wherein

[0575] The independent pores form a porosity of 1% or more and 20% or less. (((6)))

[0577] A cosmetic comprising the resin particles described in any one of (((1))) to (((5))).

[0578] The effects of the above scheme are as follows.

[0579] According to (((1))), a resin particle is provided, which has independent pores inside and has excellent shielding maintenance when wet compared to the case where the volume average particle size is less than 1 μm or exceeds 30 μm, the average major axis of the independent pores is less than 0.1 μm or exceeds 2.0 μm, or the porosity formed by the independent pores is less than 1% or exceeds 40%, and can achieve a balance between permeability and haze.

[0580] According to (((2))), there are provided resin pellets which are superior in biodegradability and shielding maintenance when wet compared to pellets containing a non-biodegradable resin as a main component, and which can achieve both permeability and haze.

[0581] According to (((3))), there are provided resin particles which are superior in biodegradability and shielding maintenance when wet compared to a case containing a cellulose derivative and which can achieve a balance between permeability and haze.

[0582] According to (((4))), a resin particle is provided which has excellent shielding maintenance when wet compared to a case where the average major diameter of closed pores is less than 0.1 μm or exceeds 1.5 μm, and can achieve a balance between permeability and haze.

[0583] According to (((5))), a resin particle is provided which has excellent shielding maintenance when wet compared to a case where the porosity formed by closed pores is less than 1% or exceeds 20%, and can achieve a balance between permeability and haze.

[0584] According to (((6))), a cosmetic is provided which suppresses dullness of makeup when moistened with sebum and has excellent soft-focus properties compared to a case where the following resin particles are applied: the resin particles have independent pores inside, a volume average particle size of less than 1 μm or more than 30 μm, an average major diameter of the independent pores of less than 0.1 μm or more than 2.0 μm, or a porosity formed by the independent pores of less than 1% or more than 40%.

Claims

1. A resin particle, characterized in that There are independent holes inside. The volume average particle size is 1 μm or more and 30 μm or less, and the average major diameter of the independent pores is 0.1 μm or more and 2.0 μm or less. The independent pores may form a void ratio of 1% to 40%.

2. The resin particles according to claim 1, wherein Contains biodegradable resin as the main component.

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

4. The resin particles according to any one of claims 1 to 3, wherein The average major diameter of the independent pores is 0.1 μm or more and 1.5 μm or less.

5. The resin particles according to any one of claims 1 to 4, wherein The independent pores form a porosity of 1% or more and 20% or less.

6. A cosmetic, characterized in that: Containing the resin particles according to any one of claims 1 to 5.

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