Film-forming composition for skin

Abstract

A film-forming composition for skin contains the following components (A) to (E). A C14-22 higher alcohol (A) that is solid at 25°C A surfactant (B) A polyhydric alcohol (C) that is liquid at 25°C or a sugar alcohol Water (D) Regenerated cellulose fibers (E) having an average fiber diameter of 0.5 μm to 5 μm, and an average fiber length of 20 μm to 300 μm The film-forming composition for skin further preferably contains a solid fat (excluding component (A)) that is solid at 25°C.

Description

Skin film-forming composition

[0001] The present invention relates to a film-forming composition for skin.

[0002] Various techniques for incorporating fibers into cosmetics are known. For example, Patent Document 1 proposes an emulsion in which fibers made of a thermoplastic polymer and having a number-average single fiber diameter of 1 to 500 nm are dispersed in a solvent. The document states that this emulsion has excellent uniform dispersion and long-term dispersion stability.

[0003] The present applicant previously proposed a film-forming composition containing fibers with an average fiber diameter of 0.1 μm to 7 μm and a volatile component (Patent Document 2). This film-forming composition has the advantage of easily forming a film with excellent adhesion and durability.

[0004] US2007 / 196401A1US2022 / 233410A1

[0005] The present invention relates to a film-forming composition for skin containing the following components (A) to (E): (A) a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C; (B) a surfactant; (C) a polyhydric alcohol that is liquid at 25°C or is a sugar alcohol; (D) water; and (E) regenerated cellulose fibers having an average fiber diameter of 0.5 μm or more and 5 μm or less and an average fiber length of 20 μm or more and 300 μm or less. Detailed Description of the Invention

[0006] The fibers used in the above-mentioned Patent Documents 1 and 2 are both composed of hydrophobic materials, making it difficult to achieve good dispersion in an aqueous phase. On the other hand, even hydrophilic materials are not necessarily easily dispersed in an aqueous phase. If the fibers are insufficiently dispersed in the composition, for example, when the emulsions or compositions described in these documents are applied to a surface to form a coating, the fibers are likely to aggregate during the drying process of the coating. As a result, it is difficult to improve the uniformity of the film formed by drying, which affects the appearance of the skin after application. Therefore, the present invention relates to a film-forming composition for skin that allows the fibers to be uniformly dispersed and can form a film that has a good appearance after application.

[0007] The present invention will be described below based on its preferred embodiments. The present invention relates to a film-forming composition for skin. The film-forming composition for skin of the present invention (hereinafter also simply referred to as "film-forming composition") is a composition applied to the surface of human skin for the purpose of forming a film on the surface of skin. The film is formed on the surface of skin for, but not limited to, cosmetic purposes and for the purpose of maintaining a healthy state of skin, such as moisturizing, protecting the skin from external stimuli, and absorbing and retaining secreted sebum.

[0008] The film-forming composition of the present invention contains as its constituent a higher alcohol having 14 to 22 carbon atoms that is solid at 25° C. (hereinafter also referred to as "component (A)") Component (A) is a material that constitutes the oil phase in relation to the water contained in the film-forming composition of the present invention, and is incorporated for the purposes of increasing the durability of the fiber network in the formed film and increasing the transparency of the film.

[0009] As component (A), it is preferable to use an aliphatic alcohol, and it is particularly preferable to use a straight-chain aliphatic alcohol and / or a saturated aliphatic alcohol, and it is particularly preferable to use a straight-chain saturated aliphatic alcohol.

[0010] Specific examples of component (A) include saturated aliphatic monohydric alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, arachidyl alcohol, and behenyl alcohol. These higher alcohols can be used alone or in combination of two or more.

[0011] From the viewpoint of storage stability of the emulsion state, it is preferable to use a combination of two or more aliphatic alcohols with different carbon numbers as component (A).For example, it is preferable to use cetearyl alcohol.In this case, the mass ratio (a1) / (a2) of (a1) short-chain (14 to less than 18 carbon atoms) aliphatic alcohol to (a2) long-chain (18 to 20 carbon atoms) aliphatic alcohol is preferably 0.1 or more, more preferably 0.6 or more, and even more preferably 1.0 or more.In addition, (a1) / (a2) is preferably 7.0 or less, more preferably 5.0 or less, even more preferably 3.0 or less, and even more preferably 2.5 or less.

[0012] The content of component (A) in the film-forming composition of the present invention is preferably 0.4% by mass or more, more preferably 0.6% by mass or more, and even more preferably 0.8% by mass or more, from the viewpoints of the dispersibility of component (A) and the durability of the formed film. Furthermore, taking into consideration a practical blending amount, the content of component (A) is preferably 6% by mass or less, more preferably 5.5% by mass or less, and even more preferably 5.2% by mass or less. The content and skeletal structure of component (A) can be determined by specifying and identifying the molecular structure using known techniques such as NMR (nuclear magnetic resonance), chromatography, and IR analysis, or a combination thereof. Furthermore, the content of component (A) can be measured by the above-mentioned measuring means, for example, by measuring the intensity of the portion showing the skeletal structure.

[0013] The film-forming composition of the present invention contains a surfactant (hereinafter also referred to as "component (B)"). Component (B) is blended into the film-forming composition together with the above-mentioned component (A) for the purpose of forming a lamellar α-gel structure. This increases the durability of the fiber network in the film and also increases the transparency of the film. Component (B) is preferably one or more surfactants selected from nonionic surfactants, anionic surfactants, cationic surfactants, and amphiphilic surfactants, and more preferably one or more surfactants selected from anionic surfactants and amphiphilic surfactants.

[0014] Of the component (B), examples of the nonionic surfactant include sucrose fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, ethylene glycol fatty acid esters, polyoxyethylene fatty acid esters, polyalkylene glycol alkyl ethers, polyoxyethylene hydrogenated castor oil, propylene glycol fatty acid esters, glycerin alkyl ethers, fatty acid alkanolamides, fatty acid dialkanolamides, polyoxyethylene sorbitan monostearate, and polyether-modified silicones.

[0015] Among these nonionic surfactants, from the viewpoint of emulsion stability and application properties, one or more selected from glycerin monofatty acid esters such as glyceryl stearate and glyceryl behenate; sorbitan monofatty acid esters such as sorbitan stearate; sorbitan difatty acid esters such as sorbitan distearate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate; sucrose fatty acid esters such as sucrose coconut fatty acid; and polyalkylene glycol alkyl ethers such as polyoxyethylene stearyl ether and polyoxyethylene cetyl ether are preferred.

[0016] Of the components (B), the ionic surfactant may be one or more selected from anionic surfactants, cationic surfactants, and amphiphilic surfactants, and preferably contains one or more selected from anionic surfactants and amphiphilic surfactants. Examples of anionic surfactants include N-acylamino acids or salts thereof, such as stearoyl glutamic acid or a salt thereof, coconut oil fatty acid arginine or a salt thereof, and sodium lauroyl sarcosinate, and N-acyltaurine or a salt thereof; fatty acids or salts thereof having 12 to 22 carbon atoms, such as sodium laurate and potassium palmitate; alkyl sulfates or salts thereof having 12 to 22 carbon atoms, such as sodium lauryl sulfate and potassium lauryl sulfate; alkyl ether sulfates or salts thereof having 12 to 22 carbon atoms, such as polyoxyethylene triethanolamine lauryl sulfate; alkyl phosphates or salts thereof having 12 to 22 carbon atoms, such as sodium monostearyl phosphate; polyoxyethylene alkyl ether phosphates or salts thereof having 12 to 22 carbon atoms, such as sodium polyoxyethylene cetyl ether phosphate, sodium polyoxyethylene oleyl ether phosphate, and sodium polyoxyethylene stearyl ether phosphate; and dialkyl sulfosuccinates or salts thereof having 12 to 24 carbon atoms, such as di-2-ethylhexyl sodium sulfosuccinate.

[0017] Preferred anionic surfactants are saturated fatty acids having 12 to 22 carbon atoms or salts thereof, N-acylamino acids or salts thereof, and N-acyltaurines or salts thereof. From the viewpoint of storage stability in an emulsified state, preferred saturated fatty acids are palmitic acid, stearic acid, and isostearic acid. From the viewpoint of storage stability in an emulsified state, the acyl groups of the N-acylamino acids and N-acyltaurines are preferably derived from saturated or unsaturated straight-chain or branched-chain fatty acids or mixed fatty acids thereof, more preferably from straight-chain fatty acids or mixed fatty acids of straight-chain fatty acids. The number of carbon atoms in the straight-chain fatty acids is preferably 6 or more, more preferably 10 or more, and even more preferably 12 or more. The number of carbon atoms in the straight-chain fatty acids is preferably 22 or less, more preferably 20 or less, and even more preferably 18 or less. From the viewpoint of reducing skin irritation, the acyl group is preferably one or more selected from a capryloyl group, a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, and a cocoyl group, and may be an acyl group derived from an animal or vegetable oil such as palm oil.

[0018] From the viewpoint of storage stability, the amino acid moiety of the N-acylamino acid is preferably glutamic acid, arginine, sarcosine, or aspartic acid. Glutamic acid may be in the D-form, the L-form, or a mixture of the D-form and the L-form, with the L-form being preferred. Specifically, from the viewpoint of storage stability in an emulsified state, the N-acylamino acid is preferably one or more selected from N-stearoyl glutamic acid, N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-cocoyl glutamic acid, N-palm fatty acid glutamic acid, and N-lauroyl aspartic acid, and more preferably one or more selected from N-stearoyl glutamic acid and N-palm fatty acid glutamic acid.

[0019] As the N-acyltaurine or a salt thereof, from the viewpoint of storage stability in an emulsified state, one or more selected from coconut oil fatty acid methyl taurine, N-caproyl methyl taurine, N-lauroyl methyl taurine, N-myristoyl methyl taurine, N-palmitoyl methyl taurine, N-stearoyl methyl taurine, and N-oleoyl methyl taurine are preferred, and N-stearoyl methyl taurine is more preferred.

[0020] Examples of salts of N-acylamino acids and N-acyltaurine include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; polyvalent metal salts such as aluminum salts and zinc salts; ammonium salts; organic amine salts such as monoethanolamine salts, diethanolamine salts, and triethanolamine salts; and basic amino acid salts such as arginine salts, lysine salts, histidine salts, and ornithine salts. These salts can be used alone or in combination of two or more. Among these, arginine salts or alkali metal salts are preferred as N-acylamino acid salts and N-acyltaurine salts from the viewpoint of storage stability in an emulsified state.

[0021] Examples of cationic surfactants include dicetyldimethylammonium chloride, distearyldimethylammonium chloride, dialakyldimethylammonium chloride, dibehenyldimethylammonium chloride, N-coconut oil fatty acid acyl-L-arginine ethyl salt, and sphingosine salt.

[0022] Examples of amphiphilic surfactants include phospholipids, such as glycerophospholipids such as lecithin, hydrogenated lecithin, hydroxylated lecithin, phosphatidylethanolamine, phosphatidylserine, phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol, and cardiolipin; and sphingophospholipids such as sphingomyelin, ceratosides, and gangliosides. Among these, hydrogenated lecithin is preferred, and hydrogenated soybean lecithin is more preferred.

[0023] From the viewpoint of improving the stability of the emulsion state during storage, the content of component (B) in the film-forming composition of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more. From the viewpoint of smoothness during application, the content of component (B) in the film-forming composition of the present invention is preferably 6% by mass or less, more preferably 5% by mass or less, and even more preferably 4% by mass or less.

[0024] The film-forming composition of the present invention contains, as a constituent, a polyhydric alcohol (hereinafter also referred to as "component (C)") that is either liquid at 25°C or a sugar alcohol. Component (C) has the effect of plasticizing regenerated cellulose fibers, which are component (E) described below. Therefore, by adjusting the type and amount of component (C) used, the physical properties of the film formed using the film-forming composition of the present invention can be controlled. Although sugar alcohols are solid at 25°C, they can dissolve in water and exhibit the same effect on fibers as polyhydric alcohols that are liquid at 25°C. The solubility of the sugar alcohol is preferably 30% by mass or more, more preferably 45% by mass or more, at 25°C. The inclusion of a sugar alcohol in the film-forming composition of the present invention improves the adhesion of the film formed from the film-forming composition.

[0025] Examples of polyhydric alcohols that are liquid at 25°C include alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butylene glycol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycols having a weight-average molecular weight of 1000 g / mol or less, and polypropylene glycol; and glycerins such as glycerin, diglycerin, and triglycerin. Examples of sugar alcohols include maltitol, sorbitol, xylitol, and erythritol. Of these, ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycols having a weight-average molecular weight of 1000 g / mol or less, glycerin, diglycerin, maltitol, and sorbitol are preferred.

[0026] The content of component (C) in the film-forming composition of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 1.5% by mass or more, so that the formed film does not feel hard and does not cause discomfort such as a tight feeling. Furthermore, the content of component (C) in the film-forming composition of the present invention is preferably 24% by mass or less, more preferably 22% by mass or less, and even more preferably 20% by mass or less, so that the durability of the film does not decrease excessively.

[0027] The film-forming composition of the present invention may further contain, as component (C'), polyethylene glycol (having a weight-average molecular weight of more than 1000 g / mol) that is solid at 25°C. When the film-forming composition of the present invention contains polyethylene glycol that is solid at 25°C, the durability of the film formed from the film-forming composition is improved. The content of polyethylene glycol that is solid at 25°C in component (C') is preferably 0.005% by mass or more, more preferably 0.008% by mass or more, even more preferably 0.01% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more. The content is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass or less.

[0028] The film-forming composition of the present invention contains water (hereinafter also referred to as "component (D)") as a constituent component. From the viewpoint of good spreadability upon application, the content of component (D) in the film-forming composition of the present invention is preferably 45% by mass or more, more preferably 50% by mass or more, even more preferably 55% by mass or more, and is preferably 98% by mass or less, more preferably 94% by mass or less, even more preferably 90% by mass or less.

[0029] The film-forming composition of the present invention contains regenerated cellulose fibers (hereinafter also referred to as "component (E)") as a constituent component. In this specification, regenerated cellulose fibers refer to natural cellulose fibers that have been dissolved by chemical treatment and then reconstituted into cellulose. Regenerated cellulose fibers have the advantage of being well dispersible in the aqueous phase of the film-forming composition of the present invention. Furthermore, they have the advantage of suppressing fiber aggregation, allowing the composition to be uniformly spread upon application. Furthermore, regenerated cellulose fibers have the advantage of being able to stably maintain their fibrous shape in the film-forming composition of the present invention (e.g., not dissolving or deforming). Furthermore, after application to the skin, they can be simply washed off and removed. Among regenerated cellulose fibers, unmodified cellulose fibers are preferred from the viewpoint of achieving better dispersibility in the aqueous phase of the film-forming composition of the present invention. Unmodified cellulose fibers are regenerated cellulose fibers in which the hydroxyl group at the C6 position of each glucose unit in the cellulose molecule is not substituted with another substituent. Unmodified cellulose fibers have a high hydroxyl group density and are highly hydrophilic. Furthermore, unmodified cellulose fibers also have the advantage of excellent salt tolerance. Excellent salt resistance is advantageous in that the unmodified cellulose fibers are less susceptible to the effects of metal ions when they are present in the film-forming composition of the present invention.

[0030] One of the characteristics of regenerated cellulose fibers is that their average fiber diameter is relatively small. Specifically, the average fiber diameter of regenerated cellulose fibers is preferably 0.5 μm or more, more preferably 0.6 μm or more, and even more preferably 0.7 μm or more, from the viewpoints of good dispersibility in the composition, ease of fiber network formation, and adhesion of the formed film. Furthermore, the average fiber diameter of regenerated cellulose fibers is preferably 5 μm or less, more preferably 4.5 μm or less, and even more preferably 4 μm or less, from the viewpoints of film durability, good adhesion of the film, and appropriate size of voids formed between fibers in the film. Furthermore, from the viewpoint of fiber manufacturability, the average fiber diameter of regenerated cellulose fibers is preferably 3 μm or less, and even more preferably 2 μm or less.

[0031] Regenerated cellulose fibers are produced by dissolving natural products such as pulp or cotton linters in chemicals, chemically extracting plant cellulose, and regenerating it into fibers. These fibers are highly pure chemical fibers in which the hydroxyl group at C6 of each glucose unit in the cellulose molecule is not substituted with other substituents. They can be produced using the viscose method, the cuprammonium method, or the solvent spinning method. For example, when producing regenerated cellulose fibers using the cuprammonium method, the fiber diameter and fiber length of the regenerated cellulose fibers can be adjusted by adjusting the concentration of the cuprammonium cellulose solution, the diameter of the spinning nozzle, and the discharge rate. The raw material for the cellulose fibers used in the film-forming composition for skin of the present invention is not particularly limited as long as it is plant- or animal-derived cellulose. Examples include pulp derived from coniferous or broad-leaved trees, cotton linters, wood flour, and plant cellulose.

[0032] Regenerated cellulose fibers generally have a non-circular cross section, and the fiber diameter of regenerated cellulose fibers refers to the length of the fiber's cross section. The fiber diameter can be measured by observing the regenerated cellulose fibers under a scanning electron microscope (hereinafter also referred to as "SEM") at 2000x or 5000x magnification, randomly selecting 100 fibers from the two-dimensional image, excluding defects (e.g., fiber clumps, fiber intersections), drawing a line perpendicular to the fiber's longitudinal direction, and directly reading the fiber diameter. The average fiber diameter is the arithmetic mean of these measurements. When regenerated cellulose fibers are dispersed in a film, the film-forming composition of the present invention is thinly applied to a substrate and measured by SEM observation.

[0033] One of the characteristics of regenerated cellulose fibers is that their length is within a specific range. Specifically, from the viewpoint of the adhesion of the formed film, the length of the regenerated cellulose fibers is preferably 20 μm or more in terms of average fiber length. To further enhance this advantage, the average fiber length of the regenerated cellulose fibers is more preferably 25 μm or more. Furthermore, from the viewpoint of suppressing entanglement and twisting of the fibers during application of the composition, the average fiber length of the regenerated cellulose fibers is preferably 250 μm or less, more preferably 200 μm or less, even more preferably 150 μm or less, and even more preferably 100 μm or less.

[0034] The average fiber length of the regenerated cellulose fibers is preferably within the above range, and the upper limit of the fiber length is preferably 300 μm or less.

[0035] The fiber length of regenerated cellulose fibers can be measured by observing them under an SEM at a magnification of 250 to 750 times depending on the fiber length, randomly selecting 100 fibers from the two-dimensional image, excluding defects (e.g., fiber clumps and fiber intersections), and directly reading their longitudinal lengths. The average fiber length is the arithmetic mean of these measurements.

[0036] Regenerated cellulose fibers having the above-mentioned average fiber length can be obtained by shortening continuous filaments having the above-mentioned average fiber diameter. Examples of fiber shortening methods include cutting, shearing, crushing, pulverizing, disintegrating, or defibrating. Specifically, dry grinding methods such as mechanical vortex grinders and impact crushers such as hammer crushers, jet grinders such as jet mills, media grinders such as ball mills and rod mills, cutter mill grinders and disc mill grinders, as well as media grinders using liquid media and wet grinders using media-less grinders, and combinations of these can be used. A more preferred fiber shortening method involves producing a fiber aggregate, such as a nonwoven fabric, in which regenerated cellulose fibers are entangled, followed by cutting the fiber aggregate to an appropriate size and then grinding it using a mechanical vortex grinder, cutter mill grinder, disc mill grinder, wet high-speed shear media-less grinder, or wet high-pressure shear media-less grinder.

[0037] The regenerated cellulose fibers preferably have a fiber length coefficient of variation (hereinafter also referred to as "CV value") within a specific range, from the viewpoint of successfully forming a fiber network in the film. Specifically, the CV value is preferably 40% or more, more preferably 42% or more, even more preferably 45% or more, from the viewpoint of facilitating the formation of a fiber network, reducing voids between the networks, and improving the film's adhesion to the skin, due to the variation in fiber length. From the viewpoint of further promoting the formation of a network between fibers, the CV value is preferably 50% or more, even more preferably 55% or more. Furthermore, from the viewpoint of improving the storage stability of the film-forming composition of the present invention and improving the film's adhesion due to fiber entanglement, the CV value of the regenerated cellulose fibers is preferably 100% or less, more preferably 95% or less, even more preferably 90% or less, from the viewpoint of improving the storage stability of the film-forming composition of the present invention and improving the film's adhesion due to fiber entanglement. From the viewpoint of suppressing fiber entanglement and improving the formation of a network between fibers, the CV value is preferably 85% or less, even more preferably 80% or less.

[0038] The CV value is calculated by [standard deviation of fiber length] / [average fiber length]×100[%].

[0039] From the viewpoint of forming a strong network in the film and improving the adhesion of the resulting film, the regenerated cellulose fibers preferably have a distribution in which the proportion of fibers with a fiber length of 40 μm or more in the total fiber is 5% or more. From the viewpoint of making this advantage even more pronounced, the regenerated cellulose fibers preferably contain 8% or more of fibers with a fiber length of 40 μm or more, and from the viewpoint of increasing fiber entanglement and further improving the strength of the film, it is even more preferable that the regenerated cellulose fibers contain 15% or more. From the viewpoint of facilitating the formation of a network in the film, the regenerated cellulose fibers preferably have a distribution in which the proportion of fibers with a fiber length of 40 μm or more is 100% or less.

[0040] The percentage of fibers with a fiber length of 40 μm or more in the regenerated cellulose fibers is determined by adjusting the magnification of the SEM from 200x to 750x so that 20 to 30 fibers fit in one SEM image, depending on the fiber length, and measuring the lengths of all fibers within the image in this state to eliminate arbitrariness. The number of fibers measured is 200 or more.

[0041] The aspect ratio of regenerated cellulose fibers, defined as [average fiber length / average fiber diameter], is preferably 8 or more, more preferably 10 or more, and even more preferably 12 or more, from the viewpoint of the adhesion of the film formed, provided that the average fiber length and average fiber diameter of the regenerated cellulose fibers are within the above-mentioned ranges. Furthermore, from the viewpoint of the uniformity of the film, resistance to aggregation, etc., the aspect ratio of the regenerated cellulose fibers is preferably 200 or less, more preferably 180 or less, even more preferably 150 or less, and even more preferably 50 or less. In this specification, the aspect ratio is not the value for a single fiber, but a value calculated from the average fiber diameter and average fiber length determined according to the above-mentioned measurement method.

[0042] Whether or not a network containing regenerated cellulose fibers is formed in a film formed using the film-forming composition of the present invention can be confirmed by SEM observation. In this specification, a fiber network refers to a state in which fibers dispersed in the film have two or more intersections with each other, thereby defining gaps between the fibers. The gaps between the fibers can hold, for example, liquid agents, oils, cosmetics, topical skin preparations, etc.

[0043] From the viewpoints of the durability of the formed film and the ease of network formation, the content of component (E) in the film-forming composition of the present invention is preferably 0.2% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and even more preferably 1% by mass or more. Furthermore, from the viewpoint of the storage stability of the composition, the content of component (E) in the film-forming composition of the present invention is preferably 10% by mass or less, even more preferably 9% by mass or less, and even more preferably 8% by mass or less. Regarding network formability, in addition to ease of formation, it is desirable that the network be formed evenly throughout, i.e., that the network be uniform. From the viewpoint of such uniformity of network formation, the content of component (E) is preferably 0.7% by mass or more, particularly preferably 1% by mass or more.

[0044] In the film-forming composition of the present invention, the mass ratio (C) / (E) of component (C) to component (E) is preferably 0.1 or more, from the viewpoint of sufficiently plasticizing component (E) so that the film does not feel hard and does not cause discomfort such as a tight feeling. To further enhance this advantage, the ratio (C) / (E) is more preferably 0.3 or more, and even more preferably 0.5 or more. Furthermore, to prevent excessive deterioration of the durability of the film, the mass ratio (C) / (E) is preferably 10 or less, more preferably 9.8 or less, and even more preferably 9.5 or less.

[0045] In the film-forming composition of the present invention, the mass ratio (A) / (E) of component (A) to component (E) is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more, from the viewpoint of further improving the durability and appearance of the film. Furthermore, from the viewpoint of further improving the durability and appearance of the film, the mass ratio (A) / (E) is preferably 20 or less, more preferably 10 or less, even more preferably 7.8 or less, and especially preferably 5.2 or less. Note that "improved film appearance" primarily refers to the effect of improving the appearance of the skin, such as making the skin appear brighter and / or smoother, when the film-forming composition is applied to the skin, but the effect is not limited thereto and may also include, for example, an effect of transparency. Note that the favorable appearance of the skin after application is thought to be due to the favorable dispersibility of the fibers.

[0046] In the film-forming composition of the present invention, the fibers form a network in the formed film, and in order to improve the durability of the film, the average fiber diameter ２ / fiber content (μm ２ / % by mass is preferably in the range of 0.05 to 8. The fiber content means the mass % of fibers in the film-forming composition. (Average fiber diameter) ２ / fiber content (μm ２ The value of (wt%) / (mass%) is an index of the cumulative length of the fibers contained in the film-forming composition of the present invention, and a larger value indicates a shorter cumulative length. From the viewpoint of sufficiently forming a uniform fiber network and forming a uniform fiber network, this value is preferably 0.1 or more, more preferably more than 0.2, even more preferably 0.23 or more, and even more preferably 0.25 or more. Furthermore, from the viewpoint of ease of blending, this value is preferably 7 or less, even more preferably 5 or less, and even more preferably 4 or less.

[0047] The film-forming composition of the present invention may contain, as the fiber material, cellulose ((C ６ H １０ O ５ ) ｎThe film-forming composition of the present invention may include modified cellulose fibers in which the hydroxyl groups in the cellulose ester group are substituted with other functional groups, and fibers other than cellulose fibers, such as thermoplastic fibers. However, from the viewpoint of making the most of the advantages of using regenerated cellulose fibers, it is preferable that the film-forming composition of the present invention contains only regenerated cellulose fibers as the fiber material.

[0048] The film-forming composition of the present invention may contain other components in addition to the above-mentioned components. For example, the film-forming composition of the present invention may contain a solid fat (hereinafter also referred to as "component (F)") other than component (A) that is solid at 20°C. Component (F) has the effect of reducing the moisture permeability of the formed film. Using component (F) in combination with the above-mentioned component (C) is preferable because it prevents excessive blockage caused by an extreme reduction in the moisture permeability of the film and reduces the feeling of pressure on the skin.

[0049] Examples of the component (F) include ceramide and cholesterol.

[0050] Examples of ceramides include natural ceramides, sphingosine derivatives, and pseudo-ceramides (substances with ceramide-like structures) described in JPS 62-228048A, JPS 63-216812A, JPS 63-227513A, JPS 64-29347A, JPS 64-31752A, JPH8-319263A, etc. These documents are incorporated herein by reference.

[0051] Specific examples of natural ceramides include ceramide Types 1 to 7, in which sphingosine, dihydrosphingosine, phytosphingosine, or sphingadienine is amidated, and further include N-alkylated versions (e.g., N-methylated versions) of these. Specific examples of pseudo-ceramides include (N-hexadecyloxyhydroxypropyl)-N-hydroxyhexadecanamide, (N-hexadecyloxyhydroxypropyl)-N-hydroxydecanamide, N-[2-(2,3-dihydroxypropyloxy)-3-hexadecyloxypropyl]-N-3-methoxypropyltetradecanamide, and N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide, with N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide being preferred.

[0052] From the viewpoints of improving storage stability, improving ease of spreadability, and improving the moist feeling on the skin after application, compounds selected from the following general formulas (1) and (2) are preferred, and the compound of general formula (1) is particularly preferred.

[0053]

[0054] (In the formula, R １ represents a hydrocarbon group having 10 to 26 carbon atoms, and R ２ represents a hydrocarbon group having 9 to 25 carbon atoms, and X represents -(CH ２ ) ｎ - (n is an integer from 2 to 6.)

[0055]

[0056] (In the formula, R ３ and R ４ R represents an optionally hydroxylated hydrocarbon group having 1 to 40 carbon atoms, and may be the same or different; ５ represents an alkylene group having 1 to 6 carbon atoms or a single bond, R ６ represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms, or a 2,3-dihydroxypropyloxy group, provided that R ５ is a single bond, R ６ is a hydrogen atom.)

[0057] In the general formulae (1) and (2), the hydrocarbon group is preferably an alkyl group or an alkenyl group.

[0058] An example of a compound of general formula (1) is N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide (INCI name: Cetyl-PG Hydroxyethyl Palmitamide). An example of a compound of general formula (2) is long-chain dibasic acid-bis-3-methoxypropylamide. The compound represented by general formula (1) is a pseudo-ceramide and a ceramide functional component, which can supplement the function of ceramide and improve skin condition (such as moisture content).

[0059] The content of component (F) in the film-forming composition of the present invention is preferably 0.3% by mass or more, more preferably 0.4% by mass or more, and even more preferably 0.5% by mass or more, from the viewpoint of improving the storage stability of the emulsion state. Furthermore, the content of component (F) in the film-forming composition of the present invention is preferably 7% by mass or less, more preferably 6% by mass or less, and even more preferably 5% by mass or less, from the viewpoint of smoothness during application.

[0060] The film-forming composition of the present invention may contain a basic compound (hereinafter also referred to as "component (G)"). Component (G) is incorporated for the purpose of neutralizing the surfactant of component (B), such as fatty acids, N-acylamino acids, and N-acyltaurines. Inorganic and organic basic compounds can be used as component (G). Examples of inorganic basic compounds include alkali metal hydroxides and alkaline earth metal hydroxides. Examples of organic basic compounds include amino acids such as arginine and alkylamines. From the viewpoint of emulsion stability (and enhanced moisturizing properties), the amount of component (G) incorporated in the film-forming composition of the present invention is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 2.5% by mass or less, and even more preferably 0.1% by mass or more and 1.8% by mass or less. Here, the amount of component (G) incorporated is the same as the content when it is present in the composition as a basic compound.

[0061] The film-forming composition of the present invention may contain an oily agent that is liquid at 20° C. (hereinafter, also referred to as "component (H)"). Component (H) is added for the purposes of further enhancing the moisturizing feeling of the skin and improving the spreadability of the film-forming composition of the present invention when applied to the skin.

[0062] Examples of component (H) include oils such as ester oils, hydrocarbon oils, silicone oils, ether oils, and fluorine oils. These oils can be used alone or in combination of two or more.

[0063] The ester oil may be one or more selected from esters of straight-chain or branched-chain fatty acids and straight-chain or branched-chain alcohols or polyhydric alcohols, or triglycerin fatty acid esters (triglycerides).Specifically, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, isononyl isononanoate, isotridecyl isononanoate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol, methylparaben ... Lithritol fatty acid ester, n-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, naphthalene dimethicone Diethylhexyl benzoate, C12-15 alkyl benzoate, cetearyl isononanoate, caprylic / capric triglyceride, butylene glycol dicaprylate / caprate, glyceryl trilaurate, glyceryl trimyristate, glyceryl tripalmitate, glyceryl triisostearate, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, glyceryl cocoate, methyl ester of castor oil fatty acids, oleyl oleate, 2-heptylundecyl palmitate , diisobutyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di-2-ethylhexyl succinate, triethyl citrate, ethylhexyl paramethoxycinnamate, tripropylene glycol dipivalate, and the like can be used.

[0064] Examples of the ether oil include alkyl-1,3-dimethylbutyl ethers such as cetyl dimethyl butyl ether, ethylene glycol dioctyl ether, glycerol monooleyl ether, dicaprylyl ether, and the like, and one or more selected from these can be used.

[0065] Examples of the hydrocarbon oil include hydrocarbon oils that are liquid at 20° C., such as liquid paraffin, squalane, squalene, polyisobutene (pentamer or higher), and liquid isoparaffin.

[0066] Examples of silicone oils include methylpolysiloxane (5 cs or more), polyether-modified silicone, amino-modified silicone, carboxy-modified silicone, methylphenylpolysiloxane, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone, and alkyl-modified silicone. Examples of the silicone oil include at least methylpolysiloxane (5 cs or more).

[0067] Examples of fluorine oils include perfluorodecalin, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and perfluoropolyether.

[0068] The content of component (H) in the film-forming composition of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, from the viewpoints of coatability and durability of the formed film. From the same viewpoints as above, the content of (H) is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 16% by mass or less.

[0069] In addition to the components described above, the film-forming composition of the present invention may contain optional components as appropriate, provided that the effects of the present invention are not impaired. Examples of optional components include ultraviolet absorbers, water-soluble polymers, pH adjusters, disinfectants, anti-inflammatory agents, preservatives, colorants, chelating agents, whitening agents, antiperspirants, insect repellents, physiologically active ingredients, salts, antioxidants, fragrances, powder components, polyhydric alcohols that are solid at 25°C, sterol esters such as cholesteryl isostearate, phytosteryl macadamiate, and branched fatty acid (C12-31) cholesteryl, and thickeners.

[0070] The film-forming composition of the present invention may contain a powder component (excluding component (A)) to the extent that the effects of the present invention are not impaired. Examples of powder components include color pigments, extender pigments, pearlescent pigments, and organic powders. Examples of color pigments include inorganic color pigments, organic color pigments, and organic dyes. Examples of color pigments include, but are not limited to, titanium dioxide, red iron oxide, yellow iron oxide, and black iron oxide. Luster pigments such as titanium mica, iron oxide-coated mica, iron oxide-coated titanium mica, organic pigment-coated titanium mica, and aluminum powder can also be used or blended. The average particle size of the powder component is preferably greater than 0.1 μm and not greater than 200 μm, more preferably 0.1 μm to 50 μm, even more preferably 0.2 μm to 20 μm, and even more preferably 0.5 μm to 10 μm, in order to ensure uniform adhesion to the skin's ridges, grooves, and pores and to impart a natural cosmetic feel. In addition, when the powder component is hydrophobized or hydrophilized, the average particle size and content or blending amount of the powder component respectively mean the average particle size and content or blending amount including the agent that has been hydrophobized or hydrophilized. From the viewpoint of ensuring the effects of the present invention, the content or blending amount of the powder component contained in the film-forming composition of the present invention is preferably 3.5 mass% or less, more preferably 2 mass% or less, even more preferably 1 mass% or less, and even more preferably 0 mass%. In particular, the content of powder components having an average particle size of more than 100 μm is preferably 3.5 mass% or less, more preferably 2 mass% or less, even more preferably 1 mass% or less, and even more preferably 0 mass%. In the present invention, the average particle size is the volume cumulative particle size D at 50% cumulative volume measured by laser diffraction / scattering method.５０ The shape of the powder component used in the present invention may be, for example, spherical, flaky, rod-like, spindle-like, needle-like, or irregular, and any shape can be used as long as the average particle size is within the above range.

[0071] The film-forming composition of the present invention can be produced by conventional methods by heating and mixing the above-mentioned components as necessary. The film-forming composition of the present invention produced in this manner is preferably an oil-in-water emulsion. In this case, it is preferable that the regenerated cellulose fiber, component (E), is present mainly in the aqueous phase. However, this does not prevent the regenerated cellulose fiber, component (E), from being present in the oil phase.

[0072] The film-forming composition of the present invention can form a uniform film on human skin by applying it. Furthermore, in this film, a fiber network is formed due to the volatilization and disappearance of volatile components. As a result, the resulting film has excellent uniformity and adhesion. In particular, the regenerated cellulose fibers contained in the film-forming composition of the present invention have good dispersibility in the aqueous phase. Furthermore, since regenerated cellulose fibers are less likely to aggregate, the composition can be spread evenly during application. As a result, a fiber network is uniformly formed in the film, improving the durability of the film. Furthermore, the appearance of the film is improved.

[0073] The film-forming composition of the present invention can be applied to the skin by, for example, applying it with the fingers, spraying it, applying it with a tool such as a roller or sponge, or applying a stick-shaped solid cosmetic. The film formed on the surface of the skin has good uniformity, excellent adhesion and durability, and preferably good transparency. The thickness of the film depends on the amount applied, but is within the range of normal use (coating basis weight of 1 to 3 mg / cm). ２ The thickness of the coating can be measured by observing the coating formed on a substrate using the coating-forming composition of the present invention with an optical microscope, an electron microscope, or the like.

[0074] In addition to the above-described embodiments, the present invention further discloses the following film-forming compositions for skin. <1> A film-forming composition for skin containing the following components (A) to (E): (A) a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C; (B) a surfactant; (C) a polyhydric alcohol that is liquid at 25°C or is a sugar alcohol; (D) water; (E) regenerated cellulose fibers having an average fiber diameter of 0.5 μm to 5 μm and an average fiber length of 20 μm to 300 μm. <2> The film-forming composition for skin according to <1>, in which the regenerated cellulose fibers of (E) have a fiber length variation coefficient of 40% to 100%. <3> The film-forming composition for skin according to <1> or <2>, further comprising a solid fat that is solid at 25°C (excluding component (A)). <4> The film-forming composition for skin according to <3>, in which the solid fat is cholesterol or ceramide. <5> The film-forming composition for skin according to any one of <1> to <4>, wherein the mass ratio (C) / (E) of component (C) to component (E) is 0.1 or more and 10 or less. <6> The film-forming composition for skin according to any one of <1> to <5>, wherein the regenerated cellulose fibers of component (E) have an aspect ratio defined by average fiber length / average fiber diameter of 8 or more and 200 or less. <7> The (average fiber diameter) of the regenerated cellulose fibers of component (E) ２ / fiber content (μm ２ <8> The film-forming composition for skin according to any one of <1> to <6>, wherein the (average fiber diameter) of the regenerated cellulose fiber of component (E) is 0.05 or more and 8 or less. ２ / fiber content (μm ２<7> The film-forming composition for skin according to <7>, wherein the (wt%) is more than 0.2 but not more than 8, more preferably 0.23 or more but not more than 7. <9> The film-forming composition for skin according to any one of <1> to <8>, wherein component (A) preferably contains an aliphatic alcohol, particularly preferably one or more selected from linear aliphatic alcohols and / or saturated aliphatic alcohols. <10> The film-forming composition for skin according to any one of <1> to <9>, wherein the content of component (A) is preferably 0.4% by mass or more but not more than 6% by mass. <11> The film-forming composition for skin according to any one of <1> to <10>, wherein component (B) preferably contains one or more selected from anionic surfactants and amphiphilic surfactants. <12> The film-forming composition for skin according to any one of <1> to <11>, wherein the content of component (B) is preferably 0.1% by mass but not more than 6% by mass. <13> The film-forming composition for skin according to any one of <1> to <12>, wherein the blending amount of powder having an average particle size of more than 100 μm is preferably 3.5% by mass or less, more preferably 1% by mass or less, and even more preferably 0% by mass. <14> The film-forming composition for skin according to any one of <1> to <13>, wherein the average fiber diameter of the regenerated cellulose fibers of component (E) is preferably 0.7 μm or more and 2 μm or less. <15> The film-forming composition for skin according to any one of <1> to <14>, wherein the average fiber length of the regenerated cellulose fibers of component (E) is preferably 20 μm or more and 150 μm or less. <16> The film-forming composition for skin according to any one of <1> to <15>, wherein the content of component (E) is preferably 0.2% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 8% by mass or less. <17> The film-forming composition for skin according to any one of <1> to <16>, wherein the mass ratio (A) / (E) of the component (A) to the component (E) is preferably from 0.05 to 20, more preferably from 0.1 to 10, and even more preferably from 0.2 to 7.8.

[0075] The present invention will be described in more detail below with reference to examples. However, the scope of the present invention is not limited to such examples. Unless otherwise specified, "%" means "% by mass."

[0076] Examples 1 to 14: The components shown in Tables 1 to 3 were blended in the proportions shown in the tables to obtain oil-in-water compositions. The resulting compositions were evaluated as follows. The results are shown in Tables 1 to 3. In each example, the average fiber diameter, average fiber length, and CV value of the regenerated cellulose fibers were adjusted as follows during the production process of the regenerated cellulose fibers. [Preparation of Cellulose Fibers] Cotton linter pulp was dissolved in a cuprammonium solution to prepare a cuprammonium cellulose solution with a cellulose concentration of 5.0% by mass, a copper concentration of 1.8% by mass, and an ammonia concentration of 5.5% by mass. This cuprammonium cellulose solution was filtered through a sintered filter with an average pore size of 5 μm to remove foreign matter. A spinning nozzle with an outlet hole with a hole diameter of 0.3 mm, 180 holes, and a hole spacing of 1.1 mm was used, and the cuprammonium cellulose solution was discharged from the outlet hole into warm water at 20°C. The resulting blue yarn was stretched and deammoniated using a flow-down tension spinning method. The blue yarn and the hot water were then separated by pouring 50°C hot water into a semicircular, inclined trough located 20 cm below the funnel outlet. The hot water was then poured into a plastic net. The blue yarn was thoroughly decoppered by showering with 10% by mass sulfuric acid. The sulfuric acid was then thoroughly washed away with pure water, yielding wet, continuous cellulose fibers. The resulting continuous cellulose fibers were diluted with pure water to prepare an aqueous suspension with a cellulose concentration of 1.0% by mass. 500 ml of this aqueous suspension was placed in a mixer (Xtreme Mill, MX-1200XT, manufactured by AS ONE Corporation) and processed for 5 minutes. The cellulose fibers were further suspended in 10% by mass sulfuric acid to a concentration of 0.1% by mass. This solution was heated to 70°C and stirred with a magnetic stirrer for 30 minutes, after which the sulfuric acid was washed away with pure water to obtain easily fibrillated cellulose fibers. The resulting fibrillation-promoting cellulose fibers were diluted with pure water to prepare an aqueous suspension with a cellulose concentration of 0.5% by mass. This aqueous suspension was then subjected to five micronization treatments using a high-pressure homogenizer (NS015H manufactured by Nia Sorobi) at an operating pressure of 100 MPa to prepare shortened regenerated cellulose fibers.

[0077] Comparative Example 1: An oil-in-water composition was obtained by using acrylic resin fibers instead of regenerated cellulose fibers and blending the components shown in Table 4 in the proportions shown in the same table. The obtained composition was evaluated as follows. The results are shown in Table 4.

[0078] Comparative Example 2: An oil-in-water composition was obtained by using cellulose nanofibers (CNF) instead of regenerated cellulose fibers and blending the components shown in Table 4 in the proportions shown in the same table. The obtained composition was evaluated as follows. The results are shown in Table 4.

[0079] Comparative Example 3 An oil-in-water composition was obtained by blending the components shown in Table 4 in the proportions shown in the same table. In this comparative example, component (E) was not blended. The resulting composition was evaluated as follows. The results are shown in Table 4.

[0080] Comparative Example 4 An oil-in-water composition was obtained by blending the components shown in Table 4 in the proportions shown in the same table. In this comparative example, component (A) was not blended. The resulting composition was evaluated as follows. The results are shown in Table 4.

[0081] Comparative Example 5 An oil-in-water composition was obtained by blending the components shown in Table 4 in the proportions shown in the same table. In this comparative example, component (B) was not blended. The resulting composition was evaluated as follows. The results are shown in Table 4.

[0082] Comparative Example 6 An oil-in-water composition was obtained by blending the components shown in Table 4 in the proportions shown in the same table. In this comparative example, component (C) was not blended. The resulting composition was evaluated as follows. The results are shown in Table 4.

[0083] [Film Durability] Five expert panelists used the film-forming composition for skin and judged the durability of the coating after 4 hours (whether it felt like it was still on the skin) based on the following criteria, and the total score was used to evaluate. <Judgment> 5: Durable. 4: Somewhat durable. 3: Neither durable nor durable. 2: Somewhat undurable. 1: Undurable. <Evaluation> ◎: Total score of 20 points or more. ○: Total score of 15 points or more but less than 20 points. △: Total score of 10 points or more but less than 15 points. ×: Total score of less than 10 points.

[0084] [Appearance of film] Five expert panelists used the film-forming composition for skin and evaluated the appearance of the skin immediately after application, making a judgment based on the following criteria, and the total score was used for evaluation. <Judgment> 5: Skin looks bright and smooth. 4: Skin looks somewhat bright and smooth. 3: Neither. 2: Skin does not look very bright or smooth. 1: Skin does not look bright or smooth. <Evaluation> ◎: Total score is 20 points or more. ○: Total score is 15 points or more but less than 20 points. △: Total score is 10 points or more but less than 15 points. ×: Total score is less than 10 points.

[0085] [Network Formability] The film-forming compositions of Examples 1 to 5 were applied to black artificial leather at a concentration of 2 mg / cm. ２ After application and drying overnight, the state of the network was observed under SEM (magnification 100-250) and judged based on the following criteria: <Judgment> ◎: A fiber network is formed densely and uniformly. ○: A fiber network is formed uniformly. △: A fiber network is formed, but there are some areas where it is not formed. (Or there are areas where individual fibers exist separately.) ×: A fiber network is not formed in most areas, or no fiber network is observed.

[0086]

[0087]

[0088]

[0089]

[0090] As is clear from the results shown in Tables 1 to 4, the coatings formed from the compositions obtained in the examples were highly durable and exhibited good appearance.

[0091] According to the film-forming composition for skin of the present invention, fiber aggregation is suppressed, and a uniform fiber network is formed in the film, resulting in improved durability and appearance of the film.

Claims

1. A film-forming composition for skin containing the following components (A) to (E): (A) a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C; (B) a surfactant; (C) a polyhydric alcohol that is liquid at 25°C or is a sugar alcohol; (D) water; and (E) regenerated cellulose fibers having an average fiber diameter of 0.5 μm or more and 5 μm or less and an average fiber length of 20 μm or more and 300 μm or less.

2. The film-forming composition for skin according to claim 1, wherein the coefficient of variation of the fiber length of the regenerated cellulose fibers in (E) is 40% or more and 100% or less.

3. The film-forming composition for skin according to claim 1 or 2, further comprising a solid fat that is solid at 25°C (excluding component (A)).

4. The film-forming composition for skin according to claim 3, wherein the solid fat is cholesterol or ceramide.

5. A film-forming composition for skin according to claim 1 or 2, wherein the mass ratio (C) / (E) of component (C) to component (E) is 0.1 or more and 10 or less.

6. A film-forming composition for skin according to claim 1 or 2, wherein the aspect ratio of the regenerated cellulose fibers of component (E), defined as the average fiber length / average fiber diameter, is 8 or more and 200 or less.

7. (Average fiber diameter) of the regenerated cellulose fiber of component (E) ２ / fiber content (μm ２ 3. The film-forming composition for skin according to claim 1, wherein the % by mass of the composition is 0.05 or more and 8 or less.

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