Skin membrane components

Abstract

To provide a film-forming composition for skin that has excellent scratch resistance.SOLUTION: The present invention relates to a film-forming composition for skin that comprises the following components (A) and (B): (A) a silicone-based film-forming agent; and (B) fibers having an average fiber diameter of 0.1-7 μm inclusive, in an amount of 0.05-2 mass% inclusive relative to the total of the film-forming composition, where the mass ratio of component (B) to component (A) (B / A) is 0.05-1 inclusive.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin film-forming composition that can form a good cosmetic film on the skin surface. [Background technology]

[0002] The technique of incorporating fibers into cosmetics is well known and is widely used in mascara and other cosmetics. Furthermore, a composition containing fibers and a copolymer containing carboxylate groups and polydimethylsiloxane groups in a physiologically acceptable medium has been reported for the purpose of applying makeup to keratinous substances such as skin (Patent Document 1). In addition, a technique of incorporating fibers into cosmetics to reduce the irritancy of cosmetics containing irritating ingredients has been reported (Patent Document 2), and cosmetics containing fibers and anti-aging activators to camouflage skin defects and treat signs of skin aging have also been reported (Patent Document 3). Moreover, it has been reported that a fiber dispersion in which the diameter of short fibers is 1 to 500 nm and the sum Pa of the ratio of such single fibers is 60% or more is incorporated in order to obtain a formulation solution, emulsion, or gel with excellent uniform dispersibility and long-term dispersion stability (Patent Document 4). Furthermore, a cosmetic composition containing short fibers obtained by cutting ultrafine synthetic fibers with a diameter of approximately 2 μm into lengths of 5 to 50 μm has been reported (Patent Document 5). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2002-193746 [Patent Document 2] Japanese Patent Publication No. 2002-293718 [Patent Document 3] Japanese Patent Publication No. 2002-293731 [Patent Document 4] Japanese Patent Publication No. 2005-320506 [Patent Document 5] Japanese Patent Publication No. 2001-64153 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, the fiber diameter used in Patent Documents 1-3 is 0.9 dtex (= 10.7 μm), which is too thick, preventing the formation of a fiber network and resulting in problems with the durability of the cosmetic film. Furthermore, the fiber used in Patent Document 4 has a long fiber length, resulting in an extremely large aspect ratio, which prevented the formation of a highly durable film. In addition, the cosmetic composition described in Patent Document 5 also failed to form a stable film on the skin.

[0005] Furthermore, the inventors' research revealed that the films obtained from cosmetic compositions as described in Patent Documents 1 to 5 are susceptible to physical abrasion and have problems with abrasion resistance. Therefore, the object of the present invention is to provide a skin film-forming composition that can form a stable film on the skin and whose resulting film has excellent abrasion resistance. [Means for solving the problem]

[0006] Therefore, the present inventors conducted various studies to solve the above problems and found that by blending ultrafine short fibers having a certain fiber diameter with a silicone-based film-forming agent in a certain ratio, a skin film-forming composition can be obtained that can form a stable film on the skin, significantly improves the abrasion resistance of the resulting film, and, when used as a cosmetic film, also improves the covering power of the cosmetic film.

[0007] The present invention relates to the following components (A) and (B); (A) Silicone-based film-forming agent, (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less: 0.05% to 2% by mass of the entire film-forming composition This invention relates to a skin film-forming composition containing a component (B) and having a mass ratio (B / A) of component (B) of 0.05 or more and 1 or less.

[0008] The present invention also relates to a method for producing a film on the skin surface, comprising the step of applying the aforementioned skin film-forming composition to the skin. Furthermore, the present invention relates to a film containing the above-described film-forming composition for skin.

Effects of the Invention

[0009] When the film-forming composition for skin of the present invention is used, a stable film can be formed on the skin, the abrasion resistance of the obtained film is remarkably improved, and when used as a cosmetic film, the covering power of the cosmetic film is also improved, and a vivid color tone with excellent coloring properties can be realized.

Brief Description of the Drawings

[0010] [Figure 1] It is a schematic diagram showing the configuration of an electrostatic spray device used for forming the fibers of component (B).

Embodiments for Carrying Out the Invention

[0011] The film-forming composition for skin of the present invention contains the following components (A) and (B); (A) A silicone-based film-forming agent, (B) Fibers having an average fiber diameter of 0.1 μm or more and 7 μm or less, 0.05% by mass or more and 2% by mass or less based on the whole film-forming composition and the mass ratio (B / A) of component (B) to component (A) is 0.05 or more and 1 or less.

[0012] The silicone-based film-forming agent of component (A) is a component having a silicone structure and capable of forming a film on the skin when applied to the skin. Specifically, the silicone-based film-forming agent is dispersed or dissolved in the film-forming composition. Further, the silicone-based film-forming agent is preferably dispersed or dissolved in an oil component.

[0013] In the present invention, the "silicone structure" refers to a structure represented by the following general formula (I).

[0014]

Chem.

[0015] In general formula (I), R1 is each independently a hydrocarbon group having 1 to 12 carbon atoms, and p is an integer of 1 or more. From the viewpoint of forming a highly abrasion-resistant film on the skin when applied to the skin (hereinafter, also referred to as "the viewpoint of forming a film excellent in abrasion resistance") and the viewpoint of versatility, R 1 is preferably an alkyl group having 1 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, more preferably an alkyl group having 1 to 12 carbon atoms or a phenyl group, still more preferably an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group.

[0016] The silicone-based film-forming agent of component (A) is preferably a polymer having a silicone structure in part. The D unit (R 1 2SiO 2 / 2 ), not only the structure, but also the M unit (R 1 3SiO 1 / 2 ), the T unit (R 1 SiO 3 / 2 ), and the Q unit (SiO 4 / 2 ) structures may be included. When it is a polymer having a silicone structure in part, the silicone structure may be present in either the main chain or the side chain in the polymer, and it is preferably present in the side chain. When the silicone structure is present in the polymer main chain, there is no particular limitation on its bonding form. For example, the silicone structure may be present at the end of the polymer main chain, or it may be a copolymer in which the silicone structure is bonded in a block or random form in the polymer main chain. In addition, a polymer graft-modified with a compound having a silicone structure can also be used.

[0017] As specific examples of component (A), one or more selected from silicone-modified pullulan, a silicic acid compound containing a silicone structure, and a silicone dendrimer can be used. Examples of silicone-modified pullulans include pullulans having a silicone structure in their side chains. Specifically, from the viewpoint of forming a film with excellent abrasion resistance and versatility, silicone-modified pullulans in which at least some of the hydrogen atoms of the OH groups in the pullulan are replaced with a group represented by the following general formula (1) are preferred.

[0018] [ka]

[0019] In the formula, Z 1 R is a single bond or a divalent organic group. 2 Each of these is an alkyl group having between 1 and 12 carbon atoms, and X is a group represented by the following formula (i). a is an integer between 1 and 3.

[0020] [ka]

[0021] In the formula, R 1 The same as above, and c is an integer between 1 and 5 (inclusive). From the viewpoint of forming a film with excellent abrasion resistance and versatility, X is preferably a trimethylsiloxy group, and a is preferably 3.

[0022] In general formula (1), from the viewpoint of forming a film with excellent abrasion resistance and from the viewpoint of versatility, Z 1 It is preferably a divalent organic group, more preferably a divalent group represented by the following general formula (2) or (3), and more preferably a divalent group represented by the following general formula (3).

[0023] [ka]

[0024] In the formula, R 11The alkylene group has 1 to 10 carbon atoms, and examples include methylene, ethylene, trimethylene, propylene, and butylene groups. From the viewpoint of forming a film with excellent abrasion resistance and versatility, among these, ethylene, trimethylene, and propylene groups are preferred, and trimethylene or propylene groups are more preferred.

[0025] Examples of commercially available silicone-modified pullulans include "TSPL-30-ID" (isododecane solution of tri(trimethylsiloxy)silylpropylcarbamate pullulan) and "TSPL-30-D5" (cyclopentasiloxane solution of tri(trimethylsiloxy)silylpropylcarbamate pullulan), both manufactured by Shin-Etsu Chemical Co., Ltd.

[0026] Examples of silicate compounds containing silicone structures include silicate compounds having a silicone structure at the terminal end, such as trialkylsiloxysilicate, fluorine-modified alkylsiloxysilicate, and phenyl-modified alkylsiloxysilicate. In trialkylsiloxysilicate, the alkyl group is preferably a C1 to C10 group, more preferably a C1 to C4 group, and even more preferably a methyl group, from the viewpoint of forming a film with excellent abrasion resistance and versatility. A specific example of trialkylsiloxysilicate is trimethylsiloxysilicate. Examples of fluorine-modified alkylsiloxysilicates include compounds in which at least some of the hydrogen atoms of the alkyl group in trialkylsiloxysilicate are replaced with fluorine atoms. Specific examples include trifluoropropyldimethylsiloxysilicate and trifluoropropyldimethyl / trimethylsiloxysilicate. Examples of phenyl-modified alkylsiloxysilicates include phenylpropyldimethylsiloxysilicate and phenylpropyldimethyl / trimethylsiloxysilicate.

[0027] Among silicone structure-containing silicate compounds, from the viewpoint of forming a film with excellent abrasion resistance, one or more selected from the group consisting of trialkylsiloxysilicate and fluorine-modified alkylsiloxysilicate are preferred.

[0028] Commercially available silicone structure-containing silicate compounds that can be used include trimethylsiloxysilicate (solution) such as "KF-7312J", "KF-7312K", "KF-7312T", "KF-7312L", "X-21-5249", "X-21-5250", "KF-9021", "X-21-5595", "X-21-5616", "KF-9021L", "X-21-5249L", and "X-21-5250L" manufactured by Shin-Etsu Chemical Co., Ltd., as well as "XS66-B8226" (cyclopentasiloxane solution of trifluoropropyldimethyl / trimethylsiloxysilicate), "XS66-B8636" (dimethicone solution of trifluoropropyldimethyl / trimethylsiloxysilicate), and "SilShine151" (phenylpropyldimethylsiloxysilicate) manufactured by Momentive Performance Materials Japan LLC.

[0029] Examples of silicone dendrimers include vinyl polymers having a siloxane dendrimer structure in their side chains. From the viewpoint of forming a film with excellent abrasion resistance and versatility, the siloxane dendrimer structure is preferably a group represented by the following general formula (4).

[0030] [ka]

[0031] In the formula, R 1 This is the same as above. Z 2 X is a single bond or a divalent organic group. 1 The base is represented by the following general formula (5) when i=1, where i is an integer between 1 and 10 that indicates the hierarchy of the base.

[0032] [ka]

[0033] In the formula, R 1 This is the same as above, and R 12 Z is an alkyl group having 1 to 10 carbon atoms. 3 X is an alkylene group having 2 to 10 carbon atoms. i+1 i is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, or a group represented by general formula (5), and i is an integer between 0 and 3.

[0034] In general formula (4), Z 2 The group is a single bond or a divalent organic group, and from the viewpoint of versatility, it is preferably a divalent organic group, and more preferably a divalent group represented by the following general formulas (6), (7), or (8).

[0035] [ka]

[0036] In the formula, R 13 R is an alkylene group having 1 to 10 carbon atoms, and examples include a methylene group, ethylene group, trimethylene group, propylene group, butylene group, etc., and from the viewpoint of versatility, an ethylene group, trimethylene group, or propylene group is preferred. 14 R is an alkyl group having 1 to 10 carbon atoms, with methyl, ethyl, propyl, and butyl groups being examples, and from a similar viewpoint, the methyl group is preferred. 15 is an alkylene group having 1 to 10 carbon atoms, with examples including a methylene group, ethylene group, trimethylene group, propylene group, and butylene group, and from a similar viewpoint, an ethylene group is preferred. q is an integer between 0 and 4, and r is 0 or 1.

[0037] Examples of vinyl polymers having the siloxane dendrimer structure described above in their side chains (hereinafter also simply referred to as "vinyl polymers") include polymers having repeating units derived from monomers represented by the following general formula (9).

[0038] [ka]

[0039] In the formula, R 1 and X 1 The same applies as described above. Y is a group containing a vinyl bond, and examples include a vinyl group, 2-acryloyloxyethyl group, 3-acryloyloxypropyl group, 2-methacryloyloxyethyl group, 3-methacryloyloxypropyl group, 4-vinylphenyl group, 3-vinylphenyl group, 4-(2-propenyl)phenyl group, 3-(2-propenyl)phenyl group, 2-(4-vinylphenyl)ethyl group, 2-(3-vinylphenyl)ethyl group, allyl group, and 5-hexenyl group. Of these, from the viewpoint of versatility, a (meth)acryloyl group or a vinyl group is preferred, and a (meth)acryloyl group is more preferred.

[0040] The vinyl polymer may further contain repeating units derived from vinyl monomers other than the monomer represented by the general formula (9). The vinyl monomer is a monomer having a group containing a vinyl bond and other than the monomer represented by the general formula (9). Examples include (meth)acrylic acid, alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate, aromatic ring-containing (meth)acrylate, fatty acid vinyl ester, (meth)acrylamide, styrene, or derivatives thereof, and one or more of these can be used. Among these, (meth)acrylic monomers such as (meth)acrylic acid, alkyl (meth)acrylate, hydroxyalkyl (meth)acrylate, and aromatic ring-containing (meth)acrylate are preferred from the viewpoint of versatility.

[0041] The content of repeating units derived from the monomer represented by the general formula (19) in the vinyl polymer is preferably 0.1% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more, relative to the total repeating units in the vinyl polymer, from the viewpoint of forming a film with excellent abrasion resistance. The upper limit is 100% by mass.

[0042] The vinyl polymer is more preferably an acrylic polymer. That is, a preferred silicone dendrimer is an acrylic polymer having a siloxane dendrimer structure in its side chain (hereinafter also referred to as "acrylic silicone dendrimer"). The acrylic silicone dendrimer is a polymer having repeating units derived from a monomer in the general formula (9) in which Y is a (meth)acroyl group, and may further contain repeating units derived from (meth)acrylic monomers other than the monomer represented by general formula (9).

[0043] Examples of commercially available silicone dendrimers include acrylic silicone dendrimers such as "FA 4001 CM Silicone Acrylate" (a cyclopentasiloxane solution of acrylate-polytrimethylsiloxymethacrylate copolymer) and "FA 4002 ID Silicone Acrylate" (an isododecane solution of acrylate-polytrimethylsiloxymethacrylate copolymer) manufactured by Toray Dow Corning.

[0044] As for component (A), from the viewpoint of forming a film with excellent abrasion resistance, one or more selected from the group consisting of silicone-modified pullulan, trimethylsiloxysilicate, trifluoropropyldimethyl / trimethylsiloxysilicate, and acrylic silicone dendrimers are more preferred, and one or more selected from trimethylsiloxysilicate and acrylic silicone dendrimers are even more preferred.

[0045] Component (A) can be used alone or in combination of two or more types. From the viewpoint of forming a film with excellent abrasion resistance, the content of component (A) in the entire film-forming composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1% by mass or more, preferably 10% by mass or less, even more preferably 9% by mass or less, and even more preferably 8% by mass or less. Furthermore, the solid content of component (A) in the total composition is preferably 0.01% by mass or more and 10% by mass or less, preferably 0.1% by mass or more and 9% by mass or less, more preferably 0.5% by mass or more and 8% by mass or less, and even more preferably 1% by mass or more and 8% by mass or less.

[0046] Component (B) is a fiber with an average fiber diameter of 0.1 μm to 7 μm. Component (B) forms a network within the formed film, providing durability to the film. When combined with component (A), it provides the formed film with excellent abrasion resistance, improves coverage, and enables the creation of vibrant colors. Component (B) exists as a solid in the skin film-forming composition, while component (A) exists dispersed or dissolved in the film-forming composition. Furthermore, whether or not the fibers in the coating form a network can be confirmed by scanning electron microscopy (SEM). A network is a state in which the fibers dispersed in the coating intersect with each other, creating gaps between the fibers, and a state in which the components contained in the coating composition can be held in these gaps. Preferably, the intersections between the fibers are such that, for example, one fiber has two or more intersections with two or more other fibers, and they are interconnected.

[0047] The average fiber diameter is, in principle, the diameter of the fiber's cross-section. Here, if the fiber's cross-section is circular, it is the diameter; if the cross-section is elliptical, it is the major axis. The average fiber diameter of the fibers used in this invention is 0.1 μm to 7 μm, from the viewpoint of improving the fiber's conformability to the skin in the formed film, thereby improving durability, and from the viewpoint of forming a film with excellent abrasion resistance. From the viewpoint of improving durability and forming a film with excellent abrasion resistance, the thickness is preferably 0.2 μm or more, and more preferably 0.3 μm or more. Furthermore, from the viewpoint of improving durability and forming a film with excellent abrasion resistance, the thickness is preferably 6 μm or less, more preferably 5 μm or less, and even more preferably 4 μm or less. The average fiber diameter can be measured by observing the fibers at 2000x or 5000x magnification using SEM, selecting 100 fibers randomly from the two-dimensional image after removing defects (e.g., fiber clumps, fiber intersections), drawing lines perpendicular to the longitudinal direction of the fibers, and directly reading the fiber diameter. The average fiber diameter is then calculated by taking the arithmetic mean of these measured values. Since the fibers are dispersed in the film-forming composition, the film-forming composition is thinly applied to a substrate and measured by SEM observation.

[0048] The fiber length is preferably 20 μm to 300 μm as the average fiber length, from the viewpoint of being able to easily form a network, improving the durability of the formed film by the network, and forming a film with excellent abrasion resistance. The average fiber length is more preferably 25 μm or more, even more preferably 30 μm or more, and even more preferably 40 μm or more, from the viewpoint of facilitating network formation and forming a film with excellent abrasion resistance. Furthermore, from the viewpoint of suppressing entanglement and twisting of fibers when applying the composition, and from the viewpoint of forming a film with excellent abrasion resistance, the thickness is more preferably 250 μm or less, and even more preferably 200 μm or less. The average fiber length can be measured by observing the fiber using a scanning electron microscope (SEM) at magnifications of 250 to 750 times, depending on the fiber length. From the resulting two-dimensional image, 100 fibers are randomly selected, removing defects (e.g., fiber clumps, fiber intersections), and lines are drawn along the longitudinal direction of the fibers to directly read their lengths. The average fiber length is then calculated by taking the arithmetic mean of these measured values.

[0049] The aspect ratio of the fibers (average fiber length / average fiber diameter) is preferably between 10 and 300, from the viewpoint of durability of the coating due to the formation of a uniform network and the formation of a coating with excellent abrasion resistance. From the viewpoint of film durability and the formation of a film with excellent abrasion resistance, a value of 20 or more is more preferable, 25 or more is even more preferable, and 27 or more is even more preferable. Furthermore, from the viewpoint of film durability and the formation of a film with excellent abrasion resistance, a value of 250 or less is more preferable, and 200 or less is even more preferable.

[0050] The coefficient of variation (CV) of the fiber length of component (B) is preferably 40% to 100% from the viewpoint of the fibers forming a network in the coating. A more preferable CV value is 42% or higher, and even more preferably 45% or higher, from the viewpoint of facilitating network formation and forming a film with excellent abrasion resistance. Furthermore, from the viewpoint of improving the storage stability of the composition, it is preferably 95% or less, and more preferably 90% or less. The CV value is calculated from the measured values ​​obtained by the fiber length measurement method described above by (standard deviation of measured fiber length) / (average fiber length) × 100 [%].

[0051] The fibers of component (B) preferably include fibers with a fiber length of 40 μm or more, and more preferably include fibers with a fiber length of 50 μm or more, from the viewpoint of forming a strong network in the coating, thereby improving the durability of the resulting coating and forming a coating with excellent abrasion resistance. Furthermore, from the viewpoint of forming a strong network within the film and creating a film with excellent abrasion resistance, it is preferable that the proportion of fibers with a fiber length of 40 μm or more in the total fiber length is 5% to 100%. It is more preferable that the content of fibers with a fiber length of 40 μm or more is 8% to 100%, and even more preferable that it is 15% to 100% from the viewpoint of further improving durability and forming a film with excellent abrasion resistance. The ratio of fibers is determined by adjusting the SEM magnification from ×200 to ×750 so that 20 to 30 fibers fit into one imaging frame of the SEM, according to the fiber length. Arbitrariness is eliminated by measuring all fibers within the image under these conditions, and a total of 200 or more fibers are measured.

[0052] The fibers of component (B), i.e., the water-insoluble polymer fibers, can be produced by treating fibers obtained from a fiber-forming polymer using various known spinning techniques to shorten them into short fibers. Here, the fiber-forming polymer is usually a thermoplastic or solvent-soluble chain polymer. Preferably, it is a thermoplastic resin with a weight-average molecular weight of 1.0 × 10⁻⁶ 4 g / mol or more 2.0×10 5 Thermoplastic resins with a concentration of g / mol or less are more preferable. Among fiber-forming polymers, water-insoluble polymers are preferred in order to maintain the shape of the fibers in the film-forming agent. Furthermore, as for the spinning method, electrospinning is preferred in order to efficiently obtain fibers with a small fiber diameter, and specifically, solution spinning and melt spinning are mentioned.

[0053] Water-insoluble polymer fibers refer to materials that, when weighed at 1 atmosphere and 23°C, are immersed in 10 g of deionized water, and after 24 hours, more than 0.5 g of the immersed fiber remains undissolved.

[0054] Examples of water-insoluble polymers include fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation when used in combination with a crosslinking agent, oxazoline-modified silicones such as poly(N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, biodegradable resins such as polyvinyl acetal diethylaminoacetate, zein (a major component of corn protein), polylactic acid (PLA), polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoic acid, polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate, acrylic resins such as polyacrylonitrile resin and polymethacrylic acid resin, polystyrene resin, polyvinyl butyral resin, polyvinyl acetal resin, polyurethane resin, polyamide resin, polyimide resin, polyamideimide resin, polypropylene resin, polyethylene resin, and various polypeptides (collagen, gelatin, fibrin, casein, etc.). These water-insoluble polymers can be used individually or in combination of two or more. Of these water-insoluble polymers, it is preferable to use one or more selected from fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation when used in combination with a crosslinking agent, polymethacrylic acid resin and other acrylic resins, polyvinyl butyral resin, polyurethane resin, polylactic acid, oxazoline-modified silicone such as poly(N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, and zein. Of these, one or more selected from polyvinyl butyral resin, acrylic resin, polypropylene resin, polyester such as polylactic acid, and polyurethane resin are more preferable from the viewpoint of ease of nanofiber formation. As the acrylic resin, octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate copolymer is preferred. Furthermore, the use of biodegradable resins such as polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoic acid is also preferable from the standpoint of reducing environmental impact. In this specification, "biodegradable" means that the degree of biodegradation of polyester, as measured in accordance with JIS K6953-1, is 30% or more.

[0055] Methods for shortening fibers include cutting, shearing, crushing, pulverizing, deburring, or defibrating. Examples include mechanical vortex pulverizers, impact crushers such as hammer crushers, jet pulverizers such as jet mills, media-type pulverizers such as ball mills and rod mills, dry pulverizers such as cutter mills and disc mills, as well as wet pulverizers using media pulverizers with liquid media, media-less pulverizers, and combinations thereof. A more preferred method for shortening the fibers involves first producing a fiber aggregate in which nanofibers are intertwined, such as a nonwoven fabric, then cutting the fiber aggregate to an appropriate size, and finally using a mechanical vortex mill, cutter mill mill, disc mill mill, wet high-speed shear medialess mill, or wet high-pressure shear medialess mill. In addition to nonwoven fabrics, the fiber aggregate may also include materials with a predetermined thickness, such as cotton-like materials.

[0056] The content of component (B) in the composition of the present invention is 0.05% by mass or more and 2% by mass or less of the total film-forming composition, from the viewpoint of durability of the formed film, ease of forming a fiber network, and forming a film with excellent abrasion resistance. The preferred content is 0.1% by mass or more, and more preferably 0.2% by mass or more, from the viewpoint of film durability, ease of forming a fiber network, and forming a film with excellent abrasion resistance. Furthermore, from the viewpoint of forming a stable composition, 1.8% by mass or less is preferred, and 1.6% by mass or less is more preferred. The content of component (B) in the entire film-forming composition is determined by first obtaining the fibers that are recognized as water-insoluble polymer fibers according to the definition of water-insoluble polymers from among the fibers contained in the composition. Next, these fibers are washed with a solvent in which they are insoluble, and then filtered to obtain only the water-insoluble polymer fibers. The solvent is preferably ethanol if the resin contained in component (B) is an ester-based resin such as PLA, and water if the resin is acrylic-based. The mass of the obtained water-insoluble polymer fibers can be measured and determined, and the ratio to the mass of the composition before washing, i.e., the entire film-forming composition, can be calculated by (mass of component (B) after washing) / (mass of composition before washing) × 100 (%).

[0057] The mass ratio (B / A) of component (B) to component (A) in the composition of the present invention is 0.05 or more and 1 or less, from the viewpoint of durability of the coating, ease of forming a fiber network, and forming a coating with excellent abrasion resistance. From the viewpoint of forming a coating with excellent durability and abrasion resistance, the mass ratio (B / A) is preferably 0.06 or higher, more preferably 0.08 or higher, and even more preferably 0.1 or higher. The mass ratio (B / A) is preferably 0.9 or less from the viewpoint of film durability, ease of forming a fiber network, and forming a film with excellent abrasion resistance, more preferably 0.8 or less, and even more preferably 0.7 or less from the viewpoint of forming a film with excellent abrasion resistance.

[0058] In the composition of the present invention, the fibers form a network within the formed film, and in order to improve the durability of the film, (average fiber diameter) 2 / fiber content (μm 2 The fiber content ( / mass%) is preferably in the range of 0.005 to 40. Fiber content refers to the mass percentage of fibers in the film-forming composition. From the viewpoint of sufficiently forming a uniform fiber network, this value is preferably 0.02 or higher, more preferably 0.03 or higher, and even more preferably 0.05 or higher. Furthermore, considering practical formulation amounts, the ratio is preferably 35 or less, more preferably 30 or less, and even more preferably 25 or less. This value, i.e., (average fiber diameter) 2 / fiber content (μm 2 The value per mass (%) is an indicator of the cumulative length of fibers contained in the composition; a higher value means a shorter cumulative length.

[0059] The composition of the present invention preferably contains a liquid substance (component (C)) selected from water and a non-volatile, liquid oil at 20°C as a dispersion medium for component (B) in order to facilitate the formation of a network of component (B) fibers in the film formed on the skin when the composition of the present invention is applied to the skin. Thus, in the film-forming composition of the present invention, component (B) is dispersed or dissolved in component (C), which facilitates the formation of a fibrous network of component (B).

[0060] Component (C) is a liquid substance selected from water and non-volatile oils that are liquid at 20°C. Component (C) includes water and one or more oils selected from ester oils, ether oils, hydrocarbon oils, higher alcohols, fluorine oils, and non-volatile silicone oils. In the present invention, it is preferable to use one or more of these in combination. In the present invention, the volatile oil is an oil with a vapor pressure of 0.01 kPa or more and 106.66 kPa or less at 20°C, and the non-volatile oil is an oil that is liquid at 20°C other than the volatile oil.

[0061] As the ester oil, one or more selected from esters consisting of a straight-chain or branched-chain fatty acid and a straight-chain or branched-chain alcohol or polyhydric alcohol, or triglycerol fatty acid esters (triglycerides) can be used. 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-hydroxystearylate, ethylene glycol di2-ethylhexanoate, dipentaerythryl Slitol fatty acid ester, n-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, naphthalene dicarb Diethylhexyl benzoate, alkyl benzoate (12-15 carbon atoms), cetearyl isononanoate, caprylic / capric triglyceride, butylene glycol dicaprylate / capric triglyceride, glyceryl trilaurate, glyceryl trimyristate, glyceryl tripalmitate, glyceryl triisostearate, glyceryl tri-heptylundecanoate, glyceryl tripehenate, glyceryl coconut oil fatty acid, methyl castor oil fatty acid, oleyl oleate, 2-heptylundecyl palmitate One or more of the following can be used: diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di2-heptylundecyl adipate, ethyl laurate, di2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di2-ethylhexyl succinate, triethyl citrate, ethylhexyl paramethoxycinnamate, tripylene glycol dipivalate, etc.

[0062] Among these, from the perspective of the durability of the formed film, the ease of forming a fiber network, and the formation of a film with excellent abrasion resistance, octyldodecyl myristate, myristyl myristate, isocetyl stearate, isocetyl isostearate, cetearyl isononanoate, diisobutyl adipate, di-2-ethylhexyl sebacate, isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, isononanoate Preferably, at least one selected from nyl, isotridecyl isononanoate, caprylic / capric triglyceride, isopropyl myristate, and ethylhexyl paramethoxycinnamate is included, and more preferably, one or more selected from diisostearyl malate, neopentyl glycol dicaprate, isononyl isononanoate, isotridecyl isononanoate, caprylic / capric triglyceride, isopropyl myristate, and ethylhexyl paramethoxycinnamate is included.

[0063] Examples of the ether oil include alkyl-1,3-dimethylbutyl ethers such as cetyldimethylbutyl ether, ethylene glycol dioctyl ether, glycerol monooleyl ether, and dicaprylyl ether, and one or more selected from these can be used. It is even more preferable to use cetyl-1,3-dimethylbutyl ether as the ether oil.

[0064] Examples of the hydrocarbon oils mentioned above include liquid paraffin, squalane, squalene, polyisobutene (pentamer or more), and liquid isoparaffin, which are hydrocarbon oils that are liquid at 20°C.

[0065] Examples of higher alcohols include those with 12 to 20 carbon atoms, specifically lauryl alcohol, isostearyl alcohol, oleyl alcohol, octyldodecanol, etc., and one or more of these can be used.

[0066] In addition, animal and vegetable oils containing the above-mentioned ester oils and hydrocarbon oils can be used. Examples of animal and vegetable oils include olive oil, jojoba oil, macadamia nut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil.

[0067] Examples of silicone oils include dimethylpolysiloxane (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, alkyl-modified silicone, etc., and it is preferable to use at least dimethylpolysiloxane (5 cs or more) as the silicone oil.

[0068] Examples of fluorinated oils include perfluorodecalin, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane, and perfluoropolyether.

[0069] The content of component (C) in the composition of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and even more preferably 20% by mass or more, considering a realistic blending amount from the viewpoint of the dispersibility of component (B) and the durability of the formed film. Furthermore, considering realistic formulation amounts, 98% by mass or less is preferred, 90% by mass or less is more preferred, 70% by mass or less is even more preferred, and 50% by mass or less is even more preferred. The content and skeletal structure of component (C) can be identified by determining the molecular structure using known techniques such as NMR (nuclear magnetic resonance), chromatography, and IR analysis, or combinations thereof. Furthermore, the content of component (C) can be measured by the above-mentioned measurement methods, for example, by the intensity of the measured value of the portion showing the above-mentioned skeletal structure. Furthermore, the content of component (C) (C1) water in the film-forming composition is preferably 1% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, even more preferably 15% by mass or more, preferably 98% by mass or less, more preferably 90% by mass or less, even more preferably 70% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of film durability, ease of forming a fiber network, and forming a film with excellent abrasion resistance. Furthermore, the mass ratio (C1) / (C) of component (C1) to component (C) is preferably 0.5 or higher, more preferably 0.6 or higher, even more preferably 0.7 or higher, even more preferably 0.8 or higher, preferably 0.96 or lower, more preferably 0.94 or lower, even more preferably 0.92 or lower, and even more preferably 0.90 or lower, from the viewpoint of durability of the film-forming film, ease of forming a fiber network, and forming a film with excellent abrasion resistance.

[0070] In addition to the components mentioned above, the skin film-forming composition of the present invention preferably contains a powder (component (D)) as a solid other than component (B) in order to improve the cosmetic effect of the film formed on the skin, i.e., to enhance the coverage provided by the cosmetic film and to achieve vivid colors with excellent color development. The powder of component (D) is an ingredient that produces various cosmetic effects on the film formed on the skin using the film-forming composition of the present invention. When these powders (D) are used together with components (A) and (B), the coverage is significantly improved and vivid colors with excellent color development can be achieved compared to when they are used as ordinary powder-containing cosmetics or when they are used together with conventional fibers with a large fiber diameter.

[0071] The powder of component (D) is not particularly limited as long as it is a powder for cosmetic use, and coloring pigments and extender pigments can be used. Of these, it is preferable to include a coloring pigment from the viewpoint of obtaining excellent cosmetic effects. Here, (D1) coloring pigment includes inorganic colored pigments, inorganic white pigments, organic coloring pigments, organic dyes, and also includes pearl pigments (lustrous powders).

[0072] Examples of inorganic coloring pigments included in the composition of the present invention include, specifically, inorganic colored pigments such as red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine, Prussian blue titanium oxide, black titanium oxide, titanium-titanium oxide sintered product, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, and cobalt titanate; and inorganic white pigments such as titanium oxide, zinc oxide, calamine, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, and composites thereof. One or more of these can be used. Of these, at least one or more selected from iron oxide, titanium oxide, and zinc oxide are preferred, and one or more selected from titanium oxide, zinc oxide, red iron oxide, yellow iron oxide, and black iron oxide are more preferred.

[0073] Examples of organic coloring pigments and organic dyes include organic tar-based pigments such as Red No. 3, Red No. 102, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 405, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; and organic dyes such as β-carotene, caramel, and paprika pigment. Other examples include those coated with polymers such as cellulose and polymethacrylate.

[0074] Examples of pearl pigments (lustrous powders) include fish scale foil, titanium dioxide-coated mica (titanium mica), bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, titanium dioxide-coated talc, titanium dioxide-coated colored mica, titanium dioxide-coated iron oxide-coated mica, fine particle titanium dioxide-coated titanium mica, fine particle zinc oxide-coated titanium mica, organic pigment-treated titanium mica, lower-grade titanium dioxide-coated mica, titanium dioxide-coated synthetic mica, titanium dioxide-coated plate-shaped silica, hollow plate-shaped titanium dioxide, iron oxide-coated mica, plate-shaped iron oxide (MIO), aluminum flakes, stainless steel flakes, titanium dioxide-coated plate-shaped alumina, glass flakes, titanium dioxide-coated glass flakes, pearl shells, gold leaf, gold vapor-deposited resin film, and metal vapor-deposited resin film. One or more of these can be used.

[0075] Extender pigments include inorganic extender pigments and organic extender pigments. Examples of inorganic extender pigments include barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium slate, barium silicate, strontium silicate, metal tungstate salts, hydroxyapatite, vermiculite, clay, bentonite, montmorillonite, hectorite, smectite, zeolite, ceramic powder, dicalcium phosphate, alumina, silica, aluminum hydroxide, boron nitride, synthetic mica, synthetic sericite, metal soap, barium sulfate-treated mica, etc. One or more of these can be used. Examples of organic extender pigments include silicone rubber powder, silicone resin-coated silicone rubber powder, polymethylsilsesquioxane, polyamide powder, nylon powder, polyester powder, polypropylene powder, polystyrene powder, polyurethane powder, vinyl resin powder, urea resin powder, phenolic resin powder, fluororesin powder, silicon resin powder, acrylic resin powder, melamine resin powder, polycarbonate resin, divinylbenzene-styrene copolymer, silk powder, wool powder, cellulose powder, long-chain alkyl metal phosphates, N-monolong-chain alkylacyl basic amino acids, and complexes thereof. One or more of these can be used. Furthermore, composite powders of the inorganic powder and the organic powder can also be mentioned.

[0076] The particle size of the powder preferably includes particles between 0.01 μm and 500 μm, more preferably between 0.02 μm and 100 μm, even more preferably between 0.03 μm and 10 μm, and still more preferably between 0.03 μm and 2 μm. Examples of the shape of the powder include spherical, plate-shaped, granular, and irregular shapes. In this context, plate-shaped powders are preferably those with an aspect ratio (average length / average thickness) of less than 20, more preferably less than 15, and even more preferably less than 10.

[0077] The aforementioned powders may be used after hydrophobic treatment, and a mixture in which one or more of these powders have been hydrophobically treated may also be used. The hydrophobic treatment is not limited to any treatment applied to ordinary cosmetic powders, and may be performed using surface treatment agents such as silicone compounds, alkylsilanes, metal soaps, amino acid compounds, lecithin, organic titanates, fluorine compounds, acrylic resins, methacrylate resins, and urethane resins, and may be carried out by dry treatment, wet treatment, etc. Preferred hydrophobic treatments include: treatment with silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicone, and organopolysiloxanes with trialkoxy groups at one or both ends; treatment with alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, caprylyltrimethoxysilane, and caprylyltriethoxysilane; treatment with metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; treatment with amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, and their derivatives; treatment with organic titanates such as lecithin and isopropyl titanium triisostearate; treatment with fluorine compounds such as perfluoroalkylalkoxysilane, fluorine-modified silicone, perfluoropolyether, and perfluoroalkyl phosphate ester; and surface treatments such as acrylic resin treatment, methacrylate resin treatment, and urethane resin treatment. Among these, surface treatments with silicone compounds, alkylsilanes, and amino acid compounds are more preferred.

[0078] The content of component (D) powder in the skin 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 5% by mass or more, from the viewpoint of improving the durability of the film, improving coverage, and achieving vivid colors with excellent color development. Also, from the same viewpoint, it is preferably 94% by mass or less, more preferably 60% by mass or less, even more preferably 50% by mass or less, and even more preferably 40% by mass or less.

[0079] The component (D) powder preferably contains the coloring pigment (D1) as described above, and it is preferable that the coloring pigment be included in the skin film-forming composition of the present invention in an amount of 0.1% by mass or more and 60% by mass or less in order to obtain an excellent cosmetic effect. More preferably, it is preferable to include 0.3% by mass or more, even more preferably 1% by mass or more, even more preferably 50% by mass or less, even more preferably 40% by mass or less, and 30% by mass or less. Furthermore, the mass ratio (D1 / D) of the coloring pigment (D1) to component (D) is preferably 0.3 or higher, more preferably 0.4 or higher, and even more preferably 0.5 or higher. Also, from a similar viewpoint, it is preferably 1 or lower, more preferably 0.9 or lower, and even more preferably 0.8 or lower.

[0080] The composition of the present invention may further contain oils other than component (C), volatile components, surfactants, polyols that are liquid at 20°C, preservatives, humectants, UV absorbers, water-soluble polymers, amino acids, dyes, etc.

[0081] Other oils besides component (C) are not limited as long as they are solid or semi-solid at 20°C and commonly used in cosmetics, and include, for example, mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon wax; plant waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, and superhydrogenated jojoba oil; animal waxes such as beeswax, snow wax, and whale wax; and synthetic waxes such as silicone wax and synthetic beeswax.

[0082] Examples of volatile components include alcohols, ketones, volatile silicone oils, and volatile hydrocarbon oils, but one or more selected from alcohols, volatile silicones, and volatile hydrocarbon oils are preferred. The volatile component is a substance that is volatile in a liquid state. The vapor pressure of the volatile substance is 0.01 kPa or more and 106.66 kPa or less at 20°C.

[0083] Suitable volatile alcohols include, for example, monohydric chain aliphatic alcohols, monohydric cyclic aliphatic alcohols, and monohydric aromatic alcohols. Examples of monohydric chain aliphatic alcohols include C1-C6 chain alcohols, examples of monohydric cyclic alcohols include C4-C6 cyclic alcohols, and examples of monohydric aromatic alcohols include benzyl alcohol and phenylethyl alcohol. Specific examples include ethanol, isopropyl alcohol, butyl alcohol, phenylethyl alcohol, n-propanol, and n-pentanol. Ethanol is preferred from the viewpoint of usability. One or more of these alcohols can be used. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as hexamethyldisiloxane (dimethylpolysiloxane (0.65cs)), octamethyltrisiloxane (dimethylpolysiloxane (1cs)), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Of these, linear dimethylpolysiloxane and branched siloxane are preferred from the viewpoint of superior feel and finish, more preferably containing one or more of hexamethyldisiloxane (dimethylpolysiloxane (0.65cs)), octamethyltrisiloxane (dimethylpolysiloxane (1cs)), dimethylpolysiloxane (1.5cs), dimethylpolysiloxane (2cs), and methyltrimethicone, even more preferably containing at least one or more of hexamethyldisiloxane (dimethylpolysiloxane (0.65cs)), octamethyltrisiloxane (dimethylpolysiloxane (1cs)), and methyltrimethicone, and even more preferably containing at least one or more of hexamethyldisiloxane (dimethylpolysiloxane (0.65cs)) and octamethyltrisiloxane (dimethylpolysiloxane (1cs)).

[0084] Examples of volatile hydrocarbon oils include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Of these, isoparaffinic hydrocarbon oils are preferred from the viewpoint of providing a good feel and suppressing unevenness in the finish, isoparaffinic hydrocarbon oils having 8 to 16 carbon atoms are more preferred, isoparaffinic hydrocarbon oils having 10 to 16 carbon atoms are even more preferred, and it is even more preferable that they contain at least isododecane. As for the volatile oil, it is preferable to include one or more selected from isododecane and dimethylpolysiloxane, which have a kinematic viscosity of 2 cSt or less at 25°C, from the viewpoint of excellent usability and finish. The kinematic viscosity can be measured, for example, using an Ubbelohde viscometer. The content of volatile components in the composition of the present invention is preferably 1% by mass or more, more preferably 10% by mass or more, even more preferably 25% by mass or more, preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 45% by mass or less, relative to the total film-forming composition, from the viewpoint of improving the durability of the film, improving coverage, and achieving vivid colors with excellent color development.

[0085] Examples of surfactants include nonionic surfactants, anionic surfactants, and cationic surfactants, with nonionic surfactants being preferred. Examples include polyoxyethylene-methylpolysiloxane copolymer, poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, cross-linked polyether-modified silicone, cross-linked alkyl polyether-modified silicone, cetyl dimethicone copolyol, sorbitan monooleate, glyceryl stearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, sorbitan sesquioleate, and diglyceryl monooleate. These surfactants may be used individually or in combination of two or more. The surfactant content in the composition of the present invention is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, based on the total amount of the film-forming composition, from the viewpoint of improving the durability of the film, improving coverage, and achieving vivid colors with excellent color development.

[0086] Examples of polyols that are liquid at 20°C include alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycol, and polypropylene glycol with a weight-average molecular weight of 2000 g / mol or less; and glycerin derivatives such as glycerin, diglycerin, and triglycerin. Of these, ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol with a weight-average molecular weight of 2000 g / mol or less, glycerin, and diglycerin are preferred, propylene glycol, 1,3-butanediol, and glycerin are more preferred, and propylene glycol and 1,3-butanediol are even more preferred.

[0087] The present invention provides for the skin film-forming composition in the form of an oily cosmetic and an emulsified cosmetic, specifically an oily cosmetic, a water-in-oil emulsion cosmetic, and an oil-in-water emulsion cosmetic. Among these, the emulsified cosmetic is preferred, and the water-in-oil emulsion cosmetic is more preferred. The composition of the present invention can be produced by conventional methods, by heating and mixing the above-mentioned components as necessary. Furthermore, the skin film-forming composition of the present invention can be applied to, for example, makeup cosmetics such as makeup base, foundation, concealer, blush, eyeshadow, mascara, eyeliner, eyebrow products, overcoat agents, and lipstick; UV protection cosmetics such as sunscreen lotion and sunscreen cream; and skincare cosmetics such as lotion, emulsion, cream, serum, and pack. It is particularly suitable as a makeup cosmetic and a UV protection cosmetic.

[0088] The composition of the present invention is a skin film-forming composition that, when applied to the skin, can form a uniform film on the skin surface. Within this film, fibers form a network, and by strengthening this fiber network with component (A), the film becomes highly durable, and the abrasion resistance of the resulting film is significantly improved. When used as a cosmetic film, it also improves the coverage of the cosmetic film and enables the creation of vivid colors with excellent color development.

[0089] When the composition of the present invention is applied to the skin, a highly durable cosmetic film can be formed on the skin surface. Means of applying the composition to the skin include application by fingers, application by spray, application using tools such as rollers or sponges, and application of stick-type solid cosmetics. According to the present invention, the film formed on the skin surface not only has excellent durability, but the abrasion resistance of the resulting film is also significantly improved. When used as a cosmetic film, the coverage provided by the cosmetic film is also improved, and vivid colors with excellent color development can be achieved. Here, the thickness of the film depends on the amount applied, but is within the normal range for use (application basis weight 1 mg / cm²). 2 More than 3mg / cm 2 In the following, the thickness is preferably 0.3 μm to 30 μm, and more preferably 0.5 μm to 20 μm. The thickness is measured on the substrate after coating using a contact-type film thickness gauge (Mitutoyo Lightmatic VL-50A). The substrate used here is made of PET.

[0090] With regard to the embodiments described above, the present invention further discloses the following compositions, manufacturing methods, and coatings.

[0091] <1> The following components (A) and (B); (A) Silicone-based film-forming agent, (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less: 0.05% to 2% by mass of the entire film-forming composition A skin film-forming composition containing the above, wherein the mass ratio (B / A) of component (B) to component (A) is 0.05 or more and 1 or less.

[0092] <2> Component (B) is a water-insoluble polymer fiber. <1> The skin film-forming composition described above. <3> The aspect ratio (average fiber length / average fiber diameter) of component (B) is between 10 and 300. <1> or <2> The skin film-forming composition described above. <4> The content of component (A) is 0.01% by mass or more and 10% by mass or less of the total film-forming composition. <1> ~ <3> A skin film-forming composition as described in any of the following. <5> Furthermore, it contains component (C) a non-volatile liquid substance. <1> ~ <4> A skin film-forming composition as described in any of the following. <6> Furthermore, it contains component (D) powder. <1> ~ <5> A skin film-forming composition as described in any of the following. <7> Component (A) is one or more selected from silicone-modified pullulan, silicone structure-containing silicate compounds, and silicone dendrimers. <1> ~ <6> A skin film-forming composition as described in any of the following. <8> Component (A) is more preferably one or more selected from the group consisting of silicone-modified pullulan, trimethylsiloxysilicate, trifluoropropyldimethyl / trimethylsiloxysilicate, and acrylic silicone dendrimers, and even more preferably one or more selected from trimethylsiloxysilicate and acrylic silicone dendrimers. <1> ~ <7> A skin film-forming composition as described in any of the following. <9> The solid content of component (A) is preferably 0.1% to 9% by mass of the entire film-forming composition, more preferably 0.5% to 8% by mass, and even more preferably 1% to 8% by mass. <1> ~ <8> A skin film-forming composition as described in any of the following. <10> The average fiber diameter of component (B) is 0.2 μm or more and 5 μm or less, preferably 0.3 μm or more and 4 μm or less, and more preferably 0.3 μm or more and 3 μm or less. <1> ~ <9> A skin film-forming composition as described in any of the following. <11> Component (B) is a water-insoluble polymer fiber. <1> ~ <10> A skin film-forming composition as described in any of the following. <12> Component (B) is a fiber having one or more polymers selected from fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation when used in combination with a crosslinking agent, acrylic resins such as polymethacrylic acid resin, polyvinyl butyral resin, polyurethane resin, polylactic acid, oxazoline-modified silicones such as poly(N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, and zein; preferably, the fiber having one or more polymers selected from polyvinyl butyral resin, acrylic resin, polypropylene resin, polyurethane resin, polylactic acid, polybutylene succinate, polyglycolic acid, polycaprolactone, and polyhydroxyalkanoic acid. <1> ~ <11> A skin film-forming composition as described in any of the following. <13> Component (B) is a fiber containing an (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer. <1> ~ <12> A skin film-forming composition as described in any of the following. <14> The average fiber length of component (B) is 20 μm or more and 300 μm or less, preferably 25 μm or more and 250 μm or less, more preferably 30 μm or more and 200 μm or less, and even more preferably 40 μm or more and 200 μm or less. <1> ~ <13> A skin film-forming composition as described in any of the following. <15> The aspect ratio (average fiber length / average fiber diameter) of component (B) is 20 or more and 250 or less, preferably 25 or more and 200 or less, and more preferably 27 or more and 200 or less. <1> ~ <14> A skin film-forming composition as described in any of the following. <16> The CV value of the fiber length of component (B) is 40% or more and 100% or less, preferably 42% or more and 95% or less, and more preferably 45% or more and 90% or less. <1> ~ <15> A skin film-forming composition as described in any of the following. <17> Component (B) contains fibers with an average fiber length of 40 μm or more, preferably containing fibers with an average fiber length of 50 μm or more. <1> ~ <16> A skin film-forming composition as described in any of the following. <18> (Average fiber diameter) in the composition 2 / fiber content (μm 2 The mass %) is 0.02 or more and 7 or less, preferably 0.02 or more and 6 or less, more preferably 0.03 or more and 5 or less, and even more preferably 0.05 or more and 4 or less. <1> ~ <17> A skin film-forming composition as described in any of the following. <19> The content of component (B) is 0.1% by mass or more and 1.8% by mass or less, preferably 0.2% by mass or more and 1.8% by mass or less, and more preferably 0.2% by mass or more and 1.6% by mass or less. <1> ~ <18> A skin film-forming composition as described in any of the following. <20> The mass ratio (B / A) of component (B) to component (A) is 0.06 or more and 0.9 or less, preferably 0.08 or more and 0.7 or less, and more preferably 0.1 or more and 0.7 or less. <1> ~ <19> A skin film-forming composition as described in any of the following. <21> Component (C) is preferably one or more selected from water and liquid oils at 20°C. <5> ~ <20> A skin film-forming composition as described in any of the following. <22> Ingredient (C) is water, as well as ester oils, ether oils, hydrocarbon oils, and higher alcohols. One or more oils selected from fluorine oil and non-volatile silicone oil. That is <5> ~ <20> A skin film-forming composition as described in any of the following. <23> It is preferable that component (B) is dispersed in component (C). <5> ~ <22> A skin film-forming composition as described in any of the following. <24> Component (D) is one or more selected from extender pigments and coloring pigments, and includes coloring pigments. <6> ~ <23> A skin film-forming composition as described in any of the following. <25> Component (D) contains one or more coloring pigments selected from inorganic colored pigments, inorganic white pigments, organic coloring pigments, organic dyes, and pearl pigments (lustrous powders). <6> ~ <24> A skin film-forming composition as described in any of the following. <26> Component (D) contains a coloring pigment, and the content of the coloring pigment is 0.1% by mass or more and 60% by mass or less in the film-forming composition. <6> ~ <25> A skin film-forming composition as described in any of the following. <27> The mass ratio (D1 / D) of the coloring pigment (D1) to component (D) is between 0.3 and 1. <6> ~ <26> A skin film-forming composition as described in any of the following. <28> Component (B) is a biodegradable resin. <1> ~ <27> A skin film-forming composition as described in any of the following.

[0093] <29> <1> ~ <28> The process includes applying a film-forming composition described in any of the above to the skin. A method for producing a film on the surface of the skin. <30> <1> ~ <28> A film comprising a skin film-forming composition as described in any of the following. <31> <1> ~ <28> Use of any one of the skin film-forming compositions described in any one of the following as an emulsified cosmetic. <32> <1> ~ <28> Use of the film-forming composition described in any one of the above, applied to the skin, preferably the face, for makeup and / or UV protection. <33> The above for the production of a cosmetic film on the skin surface <1> ~ <28> Use of any one of the skin film-forming compositions described above. [Examples]

[0094] Next, the present invention will be described in more detail with reference to examples.

[0095] [Example of manufacturing component (B)] An example of the manufacturing process for fiber B is shown. (1) An acrylic resin ((octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer) was dissolved in ethanol to obtain an 18% by mass solution. Using this solution, a nanofiber sheet was formed on the surface of the collector using the electrospinning apparatus shown in Figure 1. The manufacturing conditions for the nanofibers were as follows: • Applied voltage: 30kV • Capillary-collector distance: 150mm • Aqueous solution discharge rate: 12mL / hour • Environment: 25℃, 30%RH (2) After cutting the obtained nanofiber sheets as appropriate, a disperser blade was attached to a stirring system (Primix Corporation, Lablution® registered trademark), and the sheets were ground at a rotation speed of 5000 rpm for 30 minutes to obtain fiber B. Fibers A, C, and F were manufactured in the same manner as fiber B, by varying the polymer concentration, rotation speed, and shear time.

[0096] Furthermore, an example of the manufacturing of fiber G is shown. (1) Ester resin (polylactic acid) was dissolved in chloroform and dimethylformamide (80:20 weight ratio) to obtain a 20% by mass solution. Using these solutions, a nanofiber sheet was formed on the surface of the collector using the electrospinning apparatus shown in Figure 1. The manufacturing conditions for the nanofibers were as follows: • Applied voltage: 30kV • Capillary-collector distance: 150mm • Aqueous solution discharge rate: 12mL / hour • Environment: 25℃, 30%RH (2) The obtained nanofiber sheet was sheared using a dispersion device (Milder, manufactured by Taiheiyo Kiko Co., Ltd.) at 13,500 rpm for 8 passes through a circulation line to obtain fibers. Fiber H was produced in the same manner as fiber G, by varying the polymer concentration and circulation rate.

[0097] [Examples of composition manufacturing] The obtained fibers were combined with the components listed in Tables 1 to 4 to obtain a water-in-oil emulsion composition.

[0098] [Examples 1-13 and Comparative Examples 1-5] The water-in-oil emulsion compositions shown in Tables 1 to 4 were applied to artificial leather, and the abrasion resistance, covering effect, and color development of the coating film were evaluated. The results are shown in Tables 1 to 4.

[0099] (Evaluation method) [Coverage effect] The sample was spread onto black artificial leather (Supplere: manufactured by Idemitsu Technofine Co., Ltd.) using a 25 μm applicator. It was dried on a hot plate at 40°C and then dried overnight at room temperature. Colorimetric measurements were taken using a colorimeter (CR-400: manufactured by KONICA MINORUTA). The degree to which the black color of the reference artificial leather became lighter due to the coating was measured by taking the difference in brightness between the uncoated black artificial leather (L* value) and the sample to determine the cover effect. The average of 5 points was used.

[0100] [Good color payoff] The sample was spread onto black artificial leather (Supplere: manufactured by Idemitsu Technofine Co., Ltd.) using a 25 μm applicator. It was dried on a 40°C hot plate and then dried overnight at room temperature. Color was measured using a colorimeter (CR-400: manufactured by Konica Minoruta Co., Ltd.). Using Comparative Example A, which did not contain crushed fine fibers, as a baseline, saturation was used to determine how vivid (goodly colored) the coating film formed was. The average of 5 points was used.

[0101]

number

[0102] [Abrasion resistance] The sample was spread onto black artificial leather (Laforet: manufactured by Teijin Cordley Co., Ltd.) using a 152 μm applicator. It was dried on a hot plate at 40°C and then dried overnight at room temperature. The sample surface was rubbed in a consistent direction with the middle finger of the right hand. The middle finger was wiped with a tissue after each rub. The number of rubs until the coating was completely removed was counted.

[0103] [Table 1]

[0104] [Table 2]

[0105] [Table 3]

[0106] [Table 4] [Explanation of Symbols]

[0107] 10 Electrostatic spray device 11 Syringe 12 High-voltage sources 13 Conductive collector 11a Cylinder 11b Piston 11c Capillary

Claims

1. The following components (A), (B), and (C); (A) Silicone-based film-forming agent, (B) Fibers with an average fiber diameter of 0.1 μm or more and 7 μm or less, and an aspect ratio (average fiber length / average fiber diameter) of 10 or more and 300 or less, in an amount of 0.05% to 2% by mass of the entire film-forming composition. (C) Water and non-volatile liquid oil at 20°C, totaling 15% to 90% by mass of the entire film-forming composition. A skin film-forming composition containing the above, wherein the mass ratio (B / A) of component (B) to component (A) is 0.25 or more and 1 or less.

2. The skin film-forming composition according to claim 1, wherein component (B) is a fiber containing a water-insoluble polymer.

3. The skin film-forming composition according to claim 1 or 2, wherein the content of component (A) is 0.01% by mass or more and 10% by mass or less of the entire film-forming composition.

4. A skin film-forming composition according to any one of claims 1 to 3, wherein the mass ratio (C1) / (C) of water of component (C1) to component (C) is 0.5 or more and 0.90 or less.

5. Furthermore, the skin film-forming composition according to any one of claims 1 to 4, further comprising component (D) powder.

6. A skin film-forming composition according to any one of claims 1 to 5, wherein component (A) is one or more selected from trimethylsiloxysilicate and acrylic silicone dendrimer.

7. A method for producing a film on the surface of skin, comprising the step of applying a film-forming composition according to any one of claims 1 to 6 to the skin.

8. A film comprising the skin film-forming composition according to any one of claims 1 to 6.

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