Oil-based eye makeup cosmetics

Abstract

To provide an oil-based eye makeup cosmetic that can be easily removed with warm water. [Solution] The above problem can be solved by an eye makeup cosmetic containing an acrylic polymer, 0.1 to 10.0% by mass of a hydrophilic surfactant, and 0.1 to 10.0% by mass of a lipophilic surfactant.

Description

Technical Field

[0001] The present invention relates to an oil-based eye makeup cosmetic.

Background Art

[0002] Eye makeup cosmetics used for eyelashes and eyebrows have the effect of arranging the hair flow and shape to look more beautiful. The cosmetics are required to be resistant to breakdown over time (such as water resistance), but when this function is enhanced, they become difficult to easily wash off during face washing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide an oil-based eye makeup cosmetic that can be easily removed with warm water.

Means for Solving the Problems

[0005] As a result of intensive research to solve the above problems, the present inventor has completed the present invention.

[0006] That is, the present invention relates to, but is not limited to, the following. [Invention 1] (A) An acrylic polymer, (B) 0.1 to 10.0% by mass of a hydrophilic surfactant, and (C) 0.1 to 10.0% by mass of a lipophilic surfactant An oil-based eye makeup cosmetic containing the above. [Invention 2] The oil-based eye makeup cosmetic according to Invention 1, wherein the water content is 0.5% by mass or less. [Invention 3] An oily eye makeup cosmetic according to Invention 2, wherein the total content of water and non-volatile oil is 0.5% by mass or less. [Invention 4] The oily eye makeup cosmetic according to Invention 1, wherein the acrylic polymer contains at least one repeating unit derived from an acrylic monomer selected from the group consisting of hydroxyalkyl (meth)acrylate compounds, polyalkylene glycol (meth)acrylate compounds, acrylamide compounds, and alkyl (meth)acrylate compounds. [Invention 5] An oily eye makeup cosmetic according to Invention 1, comprising at least one solvent selected from the group consisting of n-dodecane and isododecane. [Invention 6] The oily eye makeup cosmetic according to Invention 1, wherein the hydrophilic surfactant and the lipophilic surfactant are nonionic. [Invention 7] The oil-based eye makeup cosmetic according to Invention 1, wherein the content of the acrylic polymer is 5.0 to 30.0% by mass. [Invention 8] The oily eye makeup cosmetic according to Invention 1, wherein the hydrophilic surfactant is a polyoxyethylene sorbitan fatty acid ester. [Invention 9] The oily eye makeup cosmetic according to Invention 1, wherein the lipophilic surfactant is a polyglycerin fatty acid ester, a polyether-modified silicone, or a polyglycerin-modified silicone. [Invention 10] The oil-based eye makeup cosmetic according to Invention 1, wherein the acrylic polymer is contained as a non-aqueous polymer dispersion. [Invention 11] The oil-based eye makeup cosmetic according to Invention 4, wherein the acrylic polymer is contained as a non-aqueous polymer dispersion. [Invention 12] The acrylic polymer and the solvent are contained as a non-aqueous polymer dispersion, and the oil-based eye makeup cosmetic is as described in Invention 5. [Invention 13] (D) Oily film-forming agent An oil-based eye makeup cosmetic according to any one of inventions 1 to 12, containing the following. [Effects of the Invention]

[0007] The eye makeup cosmetic of the present invention can be easily removed with warm water. [Brief explanation of the drawing]

[0008] [Figure 1] Photographs of false eyelashes without any coating and photographs of false eyelashes 24 hours after applying each sample (example and comparative example). [Modes for carrying out the invention]

[0009] While various alternative forms of the present invention are possible, this specification details specific embodiments of the invention. However, the detail of specific embodiments described herein is not intended to limit the invention to specific embodiments, and the invention encompasses all alternative forms that fall within the true spirit and scope of the invention as defined in the claims. In this specification, the terms “greater than or equal to” and “less than or equal to” used with numerical values ​​can be understood not only as a range of values ​​that include the numerical value, but also as a range of values ​​that do not include the numerical value; in other words, these terms can be interpreted as “greater than” and “less than,” respectively. Similarly, expressions that enclose two numerical values ​​with the symbol “~” may mean a range of values ​​that include both numbers, or a range of values ​​that do not include one or both of the numbers.

[0010] Eye makeup cosmetics Eye makeup refers to cosmetics used around the eyes, preferably eyelash makeup and eyebrow makeup. Eyelash makeup, also known as mascara, is used to make eyelashes appear thicker, longer, and / or curled. Eyebrow makeup, also known as eyebrow products, is used to shape and define the eyebrows and sometimes to change their color by layering colors.

[0011] The oil-based eye makeup cosmetic of the present invention (hereinafter referred to as "the cosmetic of the present invention") contains an acrylic polymer.

[0012] (A) Acrylic polymer The acrylic polymer means a (co)polymer having a repeating unit of the structure represented by the formula (1). In the formula (1), R1 represents a hydrogen atom or a methyl group. In the formula (1), R2 represents a carboxy group, an alkoxycarbonyl group, an aminocarbonyl group, a nitrile group, etc., but is not limited thereto. The acrylic polymer may be an alkali metal salt such as a sodium salt or a potassium salt. The alkoxy group in the alkoxycarbonyl group is not particularly limited as long as it is an alkoxy group having 1 to 20 carbon atoms, but an alkoxy group having 1 to 10 carbon atoms is preferable, and an alkoxy group having 1 to 6 carbon atoms is more preferable. Examples of the alkoxy group having 1 to 6 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, etc. In the present specification, the "(co)polymer" means both a homopolymer and a copolymer. "(Meth)acrylic" means both acrylic and methacrylic. The same applies to "(meth)acrylo", "(meth)acryloyl", and "(meth)acrylate", meaning acrylo and methacrylo, acryloyl and methacryloyl, and acrylate and methacrylate, respectively.

[0013]

Chem.

[0014] Examples of the acrylic polymer include a (meth)acrylic acid (co)polymer or a salt thereof, a (meth)acrylic acid ester (co)polymer, a (meth)acrylic acid amide (co)polymer, a (meth)acrylonitrile (co)polymer, etc. The molecular weight of the acrylic polymer is not particularly limited. These polymers may be used alone or in combination of two or more.

[0015] Various copolymers may have two or more structures represented by formula (1), or they may have at least one structure represented by formula (1) and at least one residue of another polymerizable unsaturated bond-containing monomer. These copolymers can be produced by polymerizing two or more monomers having the structure represented by formula (1) (hereinafter referred to as "acrylic monomers"), or by polymerizing at least one acrylic monomer and at least one other polymerizable unsaturated bond-containing monomer. The ratio of each monomer used in the production of the copolymer is not particularly limited. Various monopolymers can be produced by polymerizing acrylic monomers.

[0016] The acrylic monomers used in the production of acrylic polymers are not particularly limited, but examples include (meth)acrylic acid or its salts, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, polyalkylene glycol (meth)acrylates, and acrylamides.

[0017] Examples of (meth)acrylic acid esters include alkyl (meth)acrylates having 1 to 20 carbon atoms (C1 to 20); C1 to 20 alkyl (meth)acrylates having hydrophilic groups such as hydroxyl groups, carboxyl groups, amino groups, phosphate groups, and sulfo groups; and polyalkylene glycol (meth)acrylates.More specifically, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, s-butyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, s-pentyl (meth)acrylate, 1-ethylpropyl (meth)acrylate, 2-methylbutyl (meth)acrylate, isopentyl (meth)acrylate, t-pentyl (meth)acrylate, 3-methylbutyl (meth)acrylate, (meth)acrylate neopentyl, (meth)acrylate hexyl, (meth)acrylate 2-methylpentyl, (meth)acrylate 4-methylpentyl, (meth)acrylate 2-ethylbutyl, (meth)acrylate cyclopentyl, (meth)acrylate cyclohexyl, (meth)acrylate heptyl, (meth)acrylate 2-heptyl, (meth)acrylate 3-heptyl, (meth)acrylate octyl, (meth)acrylate 2-octyl, (meth)acrylate 2-ethylhexyl, (meth)acrylate isooctyl, (meth)acrylate Nonyl methacrylate, 3,3,5-trimethylhexyl methacrylate, decyl methacrylate, undecyl methacrylate, lauryl methacrylate, cetyl methacrylate, stearyl methacrylate, eicosyl methacrylate, docosyl methacrylate, tetracosyl methacrylate, methylcyclohexyl methacrylate, isobornyl methacrylate, norbornyl methacrylate, benzyl methacrylate, phenethyl methacrylate, 2-Hydroacrylate Examples include roxyethyl acetate, 2-hydroxypropyl methacrylate, 2,3-dihydroxypropyl methacrylate, (meth)acryloyloxy)acetic acid, 1-[2-(meth)acryloyloxy)ethyl succinate, dimethylaminoethyl methacrylate, (meth)acryloyloxyethyltrimethylammonium chloride, [2-(meth)acryloyloxy)ethyl]phosphate, sodium 2-(meth)acryloyloxy)ethanesulfonate, and polyoxyethylene (meth)acrylate.

[0018] Examples of acrylamides include N-hydroxymethyl(meth)acrylamide and N-hydroxyethyl(meth)acrylamide.

[0019] Examples of polymerizable unsaturated bond-containing monomers include hydrocarbon compounds having polymerizable unsaturated bonds at their termini, such as ethylene, propylene, and 1,3-butadiene; α,β-unsaturated polycarboxylic acids such as maleic acid and fumaric acid, and α,β-unsaturated carboxylic acid anhydrides such as maleic anhydride; maleimide group-containing compounds such as N-methylmaleimide; and aromatic vinyl compounds such as styrene and vinylbenzoic acid.

[0020] If the acrylic polymer is a copolymer, it may be either a block copolymer or a random copolymer. Both block copolymerized and random copolymerized parts may be present in the copolymer.

[0021] In the production of acrylic polymers, polymerization of various monomers is carried out by methods such as radical polymerization, cationic polymerization, and anionic polymerization. Furthermore, the acrylic polymer may be modified after polymerization using a modifying agent. The polymerization reaction temperature is not particularly limited, but is usually within the range of 70°C to 200°C. The reaction time is not particularly limited, but is usually within the range of 10 minutes to 24 hours.

[0022] (B) Hydrophilic surfactant The cosmetic composition of the present invention contains 0.1 to 10.0% by mass of a hydrophilic surfactant based on the total amount of the cosmetic composition. The HLB (hydrophile-lipophile balance) value of the surfactant is 10.0 to 20.0 (excluding the ends), preferably 12.0 to 18.0, and more preferably 13.0 to 17.0.

[0023] The hydrophilic surfactant is not particularly limited, but nonionic is preferred. Examples of nonionic hydrophilic surfactants include, but are not limited to, the following: polyoxyethylene alkyl ethers such as polyoxyethylene(20) cetyl ether, polyoxyethylene(2) cetyl ether, and polyoxyethylene(5) lauryl ether; polyoxyethylene-polyoxypropylene alkyl ethers; polyoxyethylene sorbitan fatty acid esters; polyoxyethylene propylene glycol fatty acid esters; and aliphatic alkanolamides. Preferably, polyoxyethylene sorbitan fatty acid esters are included.

[0024] Polyoxyethylene sorbitan fatty acid ester The polyoxyethylene sorbitan fatty acid esters mentioned above are not particularly limited as long as they are cosmetically acceptable. Examples include, but are not limited to, the following substances: polysorbate 21, polysorbate 40, polysorbate 60, polysorbate 65, PEG-6 sorbitan oleate, PEG-20 sorbitan isostearate, polysorbate 80, polysorbate 85, PEG-160 sorbitan triisostearate, and PEG-20 sorbitan cocoate.

[0025] (C) Lipophilic surfactant The cosmetic composition of the present invention contains 0.1 to 10.0% by mass of a lipophilic surfactant based on the total amount of the cosmetic composition. The HLB value of the surfactant is 0 to 8.0 (excluding 0), preferably 1.0 to 6.0, and more preferably 1.5 to 5.5. An HLB value of 1.5 to 4.0 is also another preferred embodiment.

[0026] The lipophilic surfactant is not particularly limited, but nonionic is preferred. Examples of nonionic lipophilic surfactants include, but are not limited to, the following: polyoxyethylene alkyl ethers such as polyoxyethylene(2) cetyl ether and polyoxyethylene(5) lauryl ether, polyoxyethylene-polyoxypropylene alkyl ethers, polyoxyethylene propylene glycol fatty acid esters, aliphatic alkanolamides, polyglycerin fatty acid esters, and polyglycerin-modified silicones. Preferably, the material contains at least one lipophilic surfactant selected from the group consisting of polyglycerin fatty acid esters, polyether-modified silicones, and polyglycerin-modified silicones.

[0027] Polyether-modified silicone The polyether-modified silicones described above are not particularly limited as long as they are cosmetically acceptable. The silicone skeleton of the polyether-modified silicone component may be branched or linear. While the hydrophilic group to be added is not particularly limited to polyoxyalkylene chains, polyether-modified silicones with 7 to 11 polyoxyethylene chains are particularly preferred. More specific examples include, but are not limited to, the following substances: PEG-9 Polydimethylsiloxyethyl Dimethicone, PEG-11 Methyl Ether Dimethicone, PEG / PPG-20 / 22 Butyl Ether Dimethicone, PEG-9 Dimethicone, PEG-3 Dimethicone, PEG-9 Methyl Ether Dimethicone, PEG-10 Dimethicone, PEG-12 Dimethicone, Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone, Cetyl PEG / PPG-10 / 1 Dimethicone, (Dimethicone (PEG-10 / 15)) Crosspolymer, PEG-32 Methyl Ether Dimethicone. More preferably, the silicone skeleton is linear, and even more preferably, it is PEG-10 dimethicone.

[0028] Polyglycerin-modified silicone The polyglycerin-modified silicones mentioned above are not particularly limited as long as they are cosmetically acceptable. Examples include, but are not limited to, the following substances: polyglyceryl-3 disiloxane dimethicone, polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

[0029] Polyglycerin fatty acid esters The polyglycerin fatty acid esters mentioned above are not particularly limited as long as they are cosmetically acceptable. Examples include esters of polyglycerin with an average degree of polymerization of 6.0 to 15.0 and fatty acids with 8 to 18 carbon atoms. More specifically, these include, but are not limited to, the following substances: hexaglycerin monooleate, hexaglycerin monostearate, hexaglycerin monopalmitate, hexaglycerin monomyristate, hexaglycerin monolaurate, decaglycerin monooleate, decaglycerin monostearate, decaglycerin pentaisostearate (polyglyceryl-10 pentaisostearate), decaglycerin monopalmitate, decaglycerin monomyristate, decaglycerin monolaurate, tetradecaglycerin monooleate, tetradecaglycerin monostearate, tetradecaglycerin monopalmitate, tetradecaglycerin monomyristate, and tetradecaglycerin monolaurate.

[0030] (D) Oily film-forming agent In one embodiment, the cosmetic composition of the present invention contains one or more oily film-forming agents. In particular, when the oily eye makeup cosmetic composition of the present invention is a mascara, it is preferable to contain an oily film-forming agent. Examples of oily film-forming agents include, but are not limited to, the following substances: silicone crosslinked polymers, silicone block copolymers, silicone graft copolymers, high-polymer dimethicone, silicone wax, and polymers whose terminal or side chains are silylated.

[0031] The cosmetic composition of the present invention may contain other components in addition to the above components, such as solvents and additives.

[0032] solvent The solvent is not limited as long as it is acceptable for cosmetic purposes, and examples include water, non-aqueous solvents (i.e., volatile oils and non-volatile oils), and any combination thereof. Here, "volatile oil" means hydrocarbon oil or silicone oil with a boiling point of 60°C or higher and less than 260°C at atmospheric pressure, and "non-volatile oil" means hydrocarbon oil or silicone oil with a boiling point of 260°C or higher at atmospheric pressure.

[0033] Volatile oils Preferably, the cosmetic composition of the present invention contains a volatile oil. The above-mentioned volatile oil is not particularly limited as long as it is cosmetically acceptable. Examples include, but are not limited to, the following substances: C8-16 hydrocarbon volatile oils such as n-decane, n-undecane, n-dodecane, isodecane, isododecane, hydrogenated polyisobutene, cyclodecane, and cyclododecane; and volatile silicone oils such as octamethylcyclotetrasiloxane.

[0034] More preferably, the volatile oil contains at least one solvent selected from the group consisting of n-dodecane and isododecane.

[0035] Non-volatile oil The non-volatile oils mentioned above are not particularly limited as long as they are acceptable in cosmetics. Examples include, but are not limited to, the following substances: linear or branched hydrocarbon oils such as petrolatum; ester oils such as ethylhexyl paramethoxycinnamate and olive oil; silicone oils such as dimethylpolysiloxane; and fluorinated oils such as fluoropolyethers.

[0036] additives Examples of additives include fibers, surfactants other than those mentioned above, thickeners such as dimethylstearylammonium hectorite, gelling agents such as dextrin palmitate, anti-caking agents, emulsifiers, dispersants, stabilizers, humectants, viscosity modifiers such as propylene carbonate, solidifying agents such as beeswax and ceresin, binders, bulking agents such as talc, opacifiers, lubricants, pigments, UV scattering agents, UV absorbing agents, pH adjusters, antioxidants, antibacterial agents, preservatives, skincare agents, lubricants, astringents, emollients, polishing agents, glossing agents, defoaming agents, water-repellent coating agents such as trimethylsiloxysilicate, protective agents, etc., but are not particularly limited as long as they are acceptable in cosmetics. Additives with two or more overlapping uses or effects may also be included.

[0037] The acrylic polymer content is preferably 1.0% by mass or more, more preferably 5.0% by mass or more, even more preferably 10.0% by mass or more, and even more preferably 15.0% by mass or more, relative to the total amount of the cosmetic. Furthermore, the acrylic polymer content is preferably 50.0% by mass or less, more preferably 30.0% by mass or less, even more preferably 25.0% by mass or less, and even more preferably 20.0% by mass or less, relative to the total amount of the cosmetic.

[0038] The hydrophilic surfactant content is 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, or 1.5% by mass or more, relative to the total amount of the cosmetic. Alternatively, the hydrophilic surfactant content may be 10% by mass or less, 7.0% by mass or less, 5.0% by mass or less, or 3.0% by mass or less, relative to the total amount of the cosmetic.

[0039] The content of lipophilic surfactants is 0.1% by mass or more, 1.0% by mass or more, 3.0% by mass or more, or 5.0% by mass or more, based on the total amount of the cosmetic. Alternatively, the content of lipophilic surfactants may be 10.0% by mass or less, 7.0% by mass or less, 5.0% by mass or less, or 3.0% by mass or less, based on the total amount of the cosmetic.

[0040] If an oily film-forming agent is included, its content shall be 1.0% by mass or more, 5.0% by mass or more, or 10.0% by mass or more, relative to the total amount of the cosmetic. Furthermore, the content of the oily film-forming agent shall be 30.0% by mass or less, 25.0% by mass or less, or 20.0% by mass or less, relative to the total amount of the cosmetic.

[0041] Preferably, the content of volatile oil is 1.0% by mass or less, and more preferably 0.5% by mass or less, relative to the total amount of the cosmetic. In other embodiments, preferably, the content of non-volatile oil is 1.0% by mass or less, and more preferably 0.5% by mass or less, relative to the total amount of the cosmetic. Particularly preferably, the total content of water and non-volatile oil is 0.5% by mass or less.

[0042] Preferably, the water content is 1.0% by mass or less, and more preferably 0.5% by mass or less, relative to the total amount of the cosmetic. In other embodiments, preferably, the non-volatile oil content is 1.0% by mass or less, and more preferably 0.5% by mass or less, relative to the total amount of the cosmetic. Particularly preferably, the total content of water and non-volatile oil is 0.5% by mass or less.

[0043] Manufacturing method The cosmetic composition of the present invention can be manufactured according to conventional formulations in accordance with the common technical knowledge of those skilled in the art. The method and order of compounding each component are arbitrary and in accordance with the common technical knowledge of those skilled in the art. For example, the cosmetic composition of the present invention can be manufactured by polymerizing acrylic monomers in a non-aqueous solvent to produce a non-aqueous polymer dispersion, mixing it with a hydrophilic surfactant and a lipophilic surfactant, and further mixing in an oily film-forming agent, additives, etc., as needed.

[0044] The form of the oil-based eye makeup cosmetic of the present invention (hereinafter referred to as "the cosmetic of the present invention") is not particularly limited. For example, it can be liquid, emulsion, gel, mousse, cream, solid, etc., and is preferably liquid or cream. [Examples]

[0045] The present invention will be further explained below with specific examples, but the present invention is not limited to these. Unless otherwise specified, the blending amounts are in mass percent. The test methods used in the present invention are as follows. The observation results in each evaluation test below represent the unified opinion of the three panelists.

[0046] 35℃ resistant The following method was used to test the resistance to water at 35°C. First, the sample was coated onto a glass slide to a thickness of 120 μm using a doctor blade, and then dried at room temperature (25°C, 65% RH (relative humidity)) for 1 hour to prepare a dried film. Next, the dried film, still on the slide glass, was immersed in 35°C water for 1 minute and then removed. The film was immediately observed with the naked eye to ensure that there was no peeling or crumbling (immediately after immersion). Furthermore, after being left in the air at room temperature for 1 minute, the film was rubbed with a finger 10, 15, or 30 times and observed with the naked eye to ensure that there was no peeling or crumbling (when rubbed). The observation results were evaluated according to the following criteria. ◎: Even after rubbing it 30 times, it doesn't come off or smudge at all. ○: After rubbing 15 times, there was no smudging or crumbling at all, but after rubbing 30 times, slight smudging and crumbling could be observed. △: After rubbing 10 times, there was no smudging or crumbling at all, but after rubbing 15 times, slight smudging or crumbling was observed. ×: Scratches and crumbling were observed after just 10 rubs.

[0047] 40℃ removability The following method was used to test the removal efficiency with hot water. The dried film, prepared using the same method as in the 35°C resistance test, was immersed in 40°C warm water for 1 minute while still in the slide glass. After being removed and left in the air at room temperature for 1 minute, the film was rubbed 10, 15, or 30 times with a finger, and its removal from the slide glass was observed visually. The observation results were evaluated according to the following criteria.

[0048] removability ◎: It was completely removed by just rubbing it 10 times. ○: It was completely removed by rubbing it just 15 times. △: It couldn't be completely removed after 15 rubs, but it was completely removed after 30 rubs. ×: It could not be completely removed even after rubbing it 30 times.

[0049] Sebum resistance To investigate resistance to sebum and other substances, a film prepared in the same manner as in the 35°C resistance test was immersed in artificial sebum (a mixture of 70% by mass of triethylhexanoin and 30% by mass of oleic acid) on a slide glass for 1 minute, and immediately removed. The film was then visually observed for any peeling or crumbling (immediately after immersion). Furthermore, after being left in the air at room temperature for 1 minute, the film was rubbed 10, 15, or 30 times with a finger and visually observed for any peeling or crumbling (when rubbed). The observation results were evaluated according to the following criteria. ◎: Even after rubbing it 30 times, it doesn't come off or smudge at all. ○: After rubbing 15 times, there was no smudging or crumbling at all, but after rubbing 30 times, slight smudging and crumbling could be observed. △: After rubbing 10 times, there was no smudging or crumbling at all, but after rubbing 15 times, slight smudging or crumbling was observed. ×: Scratches and crumbling were observed after just 10 rubs.

[0050] Manufacturing Example I of Non-Aqueous Polymer Dispersion Using 2-ethylhexyl methacrylate and tert-butyl methacrylate as polymerizable monomers and isododecane as an organic medium, polymerization was carried out with reference to the method described in Japanese Patent Application Publication No. 2018-115150, etc., to obtain a non-aqueous polymer dispersion containing 55% acrylic polymer ((acrylic acid / hydroxyethylacrylamide) copolymer 15%, (acrylates / ethylhexyl acrylate / HEDA) copolymer 40%).

[0051] Production Example II of Non-Aqueous Polymer Dispersion Using polymerizable monomers such as 2-hydroxyethyl methacrylate, N-hydroxyethyl acrylamide, t-butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and polyoxyethylene (meth)acrylate (specifically PEG-8 monomethacrylate), and isododecane as the organic medium, polymerization was carried out by known methods to obtain a 56% non-aqueous polymer dispersion (polyacrylate-51 56%) of acrylic polymer.

[0052] prescription Oily eye makeup cosmetics having the composition shown in Table 1 were prepared according to conventional methods.

[0053] [Table 1]

[0054] As can be seen by comparing Example 2 with Comparative Examples 1 and 2, by incorporating both hydrophilic and lipophilic surfactants, excellent removal performance at 40°C hot water was demonstrated.

[0055] As can be seen by comparing Example 2 and Comparative Example 3, when a silicone resin solution was used instead of an acrylic polymer, it showed excellent resistance to water at 35°C and sebum, but its removal ability at 40°C hot water was significantly reduced.

[0056] As can be seen by comparing Examples 1 and 2, the cosmetic composition of Example 2, which contains the polymer dispersion of Production Example II, could be removed more easily with 40°C hot water than Example 1. This effect is thought to be due to the presence of polyoxyethylene (meth)acrylate in the polymer dispersion of Production Example II, but the present invention is not limited to this hypothesis.

[0057] As can be seen by comparing Examples 2 and 3, in formulations where the polymer dispersion was 5.0% by mass (the acrylic polymer itself was 2.8% by mass) or less, the removal performance with 40°C hot water was not very good.

[0058] As can be seen by comparing Examples 2 and 4, when the polymer dispersion was 65.0% by mass (36.4% by mass of the acrylic polymer itself) or more, fading or disintegration was observed in water at 35°C.

[0059] As can be seen by comparing Examples 2 and 5, when the amount of PEG-20 sorbitan isostearate (HLB value 15) was 10.0% by mass or more, some degree of fading or breakdown was observed in water at 35°C.

[0060] As can be seen by comparing Examples 2 and 6, formulations containing 1.5% by mass or more of polyglyceryl-10 pentaisostearate (HLB value 3.5) and 7.0% by mass or more of PEG-20 sorbitan isostearate (HLB value 15) showed superior removal performance with 40°C hot water.

[0061] Curl effect and duration of curl effect The curling effect and the duration of the curling effect were investigated. First, as a sample of the present invention, an oil-based mascara having the composition shown in the table below was prepared according to a conventional method. Furthermore, as a comparative example, the mascara of Comparative Example 1 described in Japanese Patent Publication No. 5973097 was prepared. The 35°C resistance, 40°C removalability, and sebum resistance, evaluated according to the above criteria, are also shown in the table below. [Table 2]

[0062] As demonstrated in Table 2, the mascara of the present invention provided water resistance and sebum resistance at 35°C while exhibiting excellent removal properties with 40°C hot water.

[0063] Next, false eyelashes (FELICIA® SELECTED VOLUME FLARE EYELASH EXTENSION) were set on a vertical wall (see Figure 1), and the sample was applied to them 20 times with a brush. They were then dried at room temperature (25°C, 65% RH (relative humidity)) for 1 hour. The angle of the false eyelashes was measured before sample application, after drying for 1 hour, and after 24 hours with or without sample application. The measurement results are shown in the table below. Furthermore, photographs of the false eyelashes without sample application and photographs of the false eyelashes after 24 hours with each sample applied are shown in Figure 1. [Table 3]

[0064] As demonstrated in Table 3 and Figure 1, the mascara of the present invention was excellent in both curling effect and curl retention. [Industrial applicability]

[0065] This invention is useful as an eye makeup cosmetic such as mascara or eyebrow product, and can be widely used in the cosmetics industry.

Claims

1. (A) 5.0 to 30.0% by mass of acrylic polymer, (B) 0.1 to 10.0% by mass of a hydrophilic surfactant, and (C) 0.1 to 10.0% by mass of lipophilic surfactant An oil-based eye makeup cosmetic containing, The acrylic polymer comprises at least one repeating unit derived from an acrylic monomer selected from the group consisting of hydroxyalkyl (meth)acrylate compounds, polyalkylene glycol (meth)acrylate compounds, acrylamide compounds, and alkyl (meth)acrylate compounds. The aforementioned acrylic polymer is contained as a non-aqueous polymer dispersion. The water content is 0.5% by mass or less. Oil-based eye makeup cosmetics.

2. The oily eye makeup cosmetic according to claim 1, wherein the total content of water and non-volatile oil is 0.5% by mass or less.

3. The oily eye makeup cosmetic according to claim 1, comprising at least one solvent selected from the group consisting of n-dodecane and isododecane.

4. The oily eye makeup cosmetic according to claim 1, wherein the hydrophilic surfactant and the lipophilic surfactant are nonionic.

5. The oily eye makeup cosmetic according to claim 1, wherein the hydrophilic surfactant is a polyoxyethylene sorbitan fatty acid ester.

6. The oily eye makeup cosmetic according to claim 1, wherein the lipophilic surfactant is a polyglycerin fatty acid ester, a polyether-modified silicone, or a polyglycerin-modified silicone.

7. The oily eye makeup cosmetic according to claim 3, wherein the solvent is contained as a non-aqueous polymer dispersion.

8. (D) Oil-based coating agent An oil-based eye makeup cosmetic according to any one of claims 1 to 7, comprising the above.

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