Oil-in-water emulsion gel composition

Abstract

To provide an oil-in-water gel composition that is excellent in terms of stability, nourishing effect and color vividness of the applied film.SOLUTION: The present invention relates to an oil-in-water emulsion gel composition, comprising an oil agent that is liquid at 25°C, water, a polyol, an anionic surfactant, an amphiphilic polymer and a coloring material. The total content of the oil agent is 25 mass% or more relative to the total mass of the oil-in-water emulsion gel composition. The oil-in-water emulsion gel composition comprises a mixture of amphiphilic polymers comprising a hydrophobic group-modified hydrophilic urethane polymer and a (meth)acrylic polymer with a side chain that includes a hydrophilic group and a hydrophobic group.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsion gel composition.

Background Art

[0002] <​​​​​​​​​​In oil-in-water cosmetics containing coloring materials such as dyes, it is desirable that the coating film (makeup film) formed when the cosmetic is applied exhibits excellent color vibrancy. At the same time, from the viewpoint of easily exhibiting both care and makeup effects, it is desirable that oil-in-water cosmetics have excellent stability and nourishing effects.

[0005] However, increasing the oil content in an oil-in-water cosmetic to achieve a high nourishing effect may require a large amount of thickener to maintain high stability. On the other hand, using excessive thickeners can easily lead to the formation of an uneven or rough coating film, which may reduce the vibrancy of the coating film. For these reasons, it has been difficult to obtain a cosmetic that excels in all aspects: high nourishing effect, stability of the oil-in-water cosmetic, and vibrancy of the coating film.

[0006] Therefore, the object of the present invention is to provide an oil-in-water gel composition that is excellent in all aspects, including stability, nourishing effect, and vividness of color of the coated film. [Overview of the prefecture]

[0007] The present invention provides an oil-in-water emulsion gel composition containing an oil, water, a polyol, an anionic surfactant, an amphiphilic polymer, and a coloring material.

[0008] The oil-in-water emulsion gel composition of the present invention contains a combination of an oil, water, polyol, anionic surfactant, amphiphilic polymer, and coloring material, and is in gel form, thus exhibiting excellent nourishing effect, stability of the oil-in-water emulsion gel composition, and vivid color of the coated film. These effects are brought about by the above combination of components of the present invention, but in particular, the amphiphilic polymer interacts with emulsion particles and anionic surfactant through its hydrophobic groups, thereby increasing the viscosity of the formulation and effectively contributing to gel formation. As a result, for example, when comparing the viscosity immediately after preparation with the viscosity after standing at 50°C for one month, the viscosity retention over time is dramatically improved in the oil-in-water emulsion gel composition of the present invention. According to the oil-in-water emulsion gel composition of the present invention, both care and makeup effects are exhibited. Furthermore, according to the oil-in-water emulsion gel composition of the present invention, it is possible to form a coated film that gives a fresh and light feel.

[0009] The present invention also relates to a cosmetic method for caring for and / or makeup on keratinous substances, comprising applying the oil-in-water emulsion gel composition according to the present invention onto a keratinous substance, particularly onto the skin or lips. In particular, the cosmetic method provides a fresh and light feel, vivid color of the applied film, and nourishing effect to keratinous substances to which the composition of the present invention is applied, especially on the skin or lips. [Effects of the invention]

[0010] According to the present invention, it is possible to provide a cosmetic composition that is excellent in stability, nourishing effect, and vivid color of the coated film.

[0011] The cosmetic composition of the present invention easily forms a uniform coating film, allowing for the easy formation of a vividly colored coating film even when applied thinly. Furthermore, the cosmetic composition of the present invention forms a coating film that provides a refreshing and light feel without any dryness. [Detailed description of the invention]

[0012] In certain embodiments, the anionic surfactant is an amino acid-based anionic surfactant, preferably selected from the group consisting of N-stearoyl glutamate, dilauroyl glutamate lysine salt, and mixtures thereof.

[0013] In certain embodiments, the polyol is C 1- C6 polyol, preferably selected from the group consisting of pentylene glycol, butylene glycol, glycerin, propanediol (1,3-propanediol, propylene glycol, or mixtures thereof), dipropylene glycol, sorbitol, and mixtures thereof. 1- It is a C6 polyol.

[0014] In certain embodiments, the oil content is 20% to 50% by mass, based on the total mass of the oil-in-water emulsion gel composition. By keeping the oil content within this range, the fresh and light feel, the vividness of the coated film, and the nourishing effect are further improved.

[0015] In certain embodiments, the amphiphilic polymer is selected from the group consisting of hydrophobic-modified hydrophilic urethane polymers, (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups, hydrophobic-modified hydrophilic polysaccharides, and mixtures thereof. In certain embodiments, the composition of the present invention comprises a hydrophobic-modified hydrophilic urethane polymer and a (meth)acrylic polymer having side chains containing hydrophilic and hydrophobic groups. In certain embodiments, the hydrophobic-modified hydrophilic urethane polymer may contain a hydrophobic-modified polyether urethane that includes polyethylene glycol as a glycol component.

[0016] In certain embodiments, the oil-in-water emulsion gel composition may further contain a higher aliphatic monohydric alcohol. In this case, the vividness of the color of the coated film is further improved.

[0017] The viscosity of the oil-in-water emulsion gel composition at 25°C may be 20,000 to 400,000 cps or 30,000 to 350,000 cps, preferably 40,000 to 300,000 cps, and more preferably 50,000 to 250,000 cps. Having the viscosity of the oil-in-water emulsion gel composition at 25°C within this range results in even better color vibrancy, nourishing effect, and stability of the coated film.

[0018] Oil-in-water emulsion gel compositions can be suitably used on keratinous materials, particularly on the skin or lips, especially on the lips. In certain embodiments, the oil-in-water emulsion gel composition can be obtained by emulsifying it at a pressure of 50 MPa or higher. [Modes for carrying out the invention]

[0019] The embodiments for carrying out the present invention will be described in detail below. However, the present invention is not limited to the following embodiments. In this specification, (meth)acrylic means acrylic or methacrylic, and the same applies to other similar skeletons.

[0020] The oil-in-water emulsion gel composition of the embodiment contains an oil, water, a polyol, an anionic surfactant, an amphiphilic polymer, and a coloring material. The oil-in-water emulsion gel composition is also referred to as "oil-in-water gel cosmetic," "oil-in-water emulsion gel cosmetic," or "oil-in-water gel composition," and refers to an oil-in-water emulsion composition that does not flow for 1 hour under 25°C conditions when 0.5 g of the oil-in-water cosmetic is placed on an inclined surface tilted at 30 degrees to a horizontal plane.

[0021] Oil-in-water emulsion gel compositions are excellent in terms of stability, nourishing effect, and the vividness of the applied film, and can therefore be used for lips, or for skin, especially cheeks, or the entire face. They are particularly suitable for use on the lips.

[0022] The oil-in-water emulsion gel composition can be suitably used as a skin care cosmetic and / or a makeup cosmetic. Specific uses of the oil-in-water emulsion gel composition for lips include, for example, liquid lip cream, liquid lipstick base, liquid lipstick overcoat, and the like. Specific uses of the oil-in-water emulsion gel composition for cheeks include, for example, liquid blush cosmetic (liquid cheek cosmetic), and the like. Specific uses of the oil-in-water emulsion gel composition for the whole face include, for example, foundation, makeup base, concealer, sunscreen, and the like. Oil

[0023] As the oil agent, it is preferable to use a liquid oil agent that is liquid at the ambient temperature (25°C). Among them, liquid oil agents such as polar or non-polar hydrocarbon oil agents and polar or non-polar silicone oil agents can be blended. The oil agent may be a non-volatile oil agent or a volatile oil agent.

[0024] Examples of the oil agent include isononyl isononanoate, isotridecyl isononanoate, ethylhexyl palmitate, cetyl ethylhexanoate, neopentyl glycol diethylhexanoate, neopentyl glycol dicaprate, triethylhexanoin, glyceryl tri(caprylate / caprate), triisostearin, trimethylolpropane triisostearate, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, polyglyceryl-2 tetraisostearate, propanediol di(caprylate / caprate), propanediol diisostearate, polyglyceryl-6 octacaprylate, and mixtures thereof.

[0025] Examples of the oil agent further include octyldodecyl lactate, distearyl malate, polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, (isostearic acid / sebacic acid) ditrimethylolpropane oligoester, erythrityl triethylhexanoate, dipentaerythrityl tripolyhydroxystearate, trehalose esters of isostearic acid, dipentaerythrityl pentaisostearate, ethylhexyl hydroxystearate, polyhydroxystearic acid, liquid paraffin, squalane, α-olefin oligomer, petrolatum, polyisobutylene, polybutene, isododecane, isohexadecane, heavy liquid isoparaffin, and mixtures thereof.

[0026] Examples of the oil agent further include silicone oil agents. Examples of the silicone oil agents include dimethylpolysiloxane (dimethicone), methyltrimethicone, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, trimethylsiloxysilicate, highly polymerized methylphenylpolysiloxane, and mixtures thereof.

[0027] Among the above oil agents, examples of the preferred polar oil agent include polyglyceryl-2 triisostearate, examples of the preferred non-polar oil agents include squalane, isododecane, α-olefin oligomer, or mixtures thereof, and examples of the preferred silicone oil agents include dimethylpolysiloxane (dimethicone), methyltrimethicone, decamethylcyclopentasiloxane, or mixtures thereof.

[0028] In addition to the oils listed above, other oils that may be used include cholesteryl hydroxystearate, phytosteryl hydroxystearate, phytosteryl oleate, hexa(hydroxystearate / stearate / rosinate)dipentaerythrityl, tetra(hydroxystearate / isostearate)dipentaerythrityl, hexahydroxystearatedipentaerythrityl, (ethylhexanoate / stearate / adipate)glyceryl, tri(caprylic / capric / myristic / stearate)glyceryl, hydrogenated palm oil, petrolatum, hexa(behenate / benzoate / ethylhexanoate)dipentaerythrityl, paste-like vegetable oils, shea butter (Butyrospermum Parkii), mango seed butter (Mangifera Indica), avocado butter (Persea Gratissima), and mixtures thereof.

[0029] The oil-in-water emulsion gel composition may contain one type of oil, or it may contain two or more types of oil. For example, the oil-in-water emulsion gel composition may contain two to six types of oil, or it may contain three to four types of oil.

[0030] In certain embodiments, the total content of the oily agent may be 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, or 40% by mass or more, based on the total mass of the oil-in-water emulsion gel composition, from the viewpoint of further superiority in the vividness of the coated film and further superiority in the nourishing effect, and may be 50% by mass or less, or 45% by mass or less, from the viewpoint of further superiority in a fresh and light feel and further superiority in the vividness of the coated film. The total content of the oily agent may be 20% to 50% by mass, 25% to 50% by mass, 30% to 50% by mass, 35% to 50% by mass, 40% to 50% by mass, 20% to 45% by mass, 25% to 45% by mass, 30% to 45% by mass, 35% to 45% by mass, or 40% to 45% by mass, based on the total mass of the oil-in-water emulsion gel composition, from the viewpoint of further improving the vividness of the color of the coated film, the nourishing effect, and the fresh and light feel. In a particular preferred embodiment, the total content of the oily agent is 35% to 45% by mass, based on the total mass of the oil-in-water emulsion gel composition.

[0031] In certain embodiments, the oil may include at least one selected from the group consisting of polar oils, non-polar oils, and silicone oils, from the viewpoint of further superiority in the vividness of the coated film and / or further superiority in the nourishing effect, or may include two or three selected from the group consisting of polar oils, non-polar oils, and silicone oils, or may include polar oils, non-polar oils, and silicone oils.

[0032] The content ratio of polar oil to the total mass of oil may be 1% by mass or more, 5% by mass or more, 10% by mass or more, 20% by mass or more, or 30% by mass or more, and may be 100% by mass or less, 98% by mass or less, 95% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, or 30% by mass or less, and may be 1 to 80% by mass, 5 to 60% by mass or more, 10 to 50% by mass or more, or 20 to 40% by mass.

[0033] The content ratio of non-polar oil to the total mass of oil may be 1% by mass or more, 5% by mass or more, 10% by mass or more, 20% by mass or more, or 30% by mass or more, and may be 100% by mass or less, 98% by mass or less, 95% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, or 30% by mass or less, and may be 1 to 80% by mass, 5 to 60% by mass or more, 10 to 50% by mass or more, or 20 to 40% by mass.

[0034] The content ratio of silicone oil to the total mass of the oil may be 1% by mass or more, 5% by mass or more, 10% by mass or more, 20% by mass or more, or 30% by mass or more, and may be 100% by mass or less, 98% by mass or less, 95% by mass or less, 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, or 30% by mass or less, and may be 1 to 80% by mass, 5 to 60% by mass or more, 10 to 50% by mass or more, or 20 to 40% by mass.

[0035] The oil-in-water emulsion gel composition contains water. The water content may be 35% by mass or more, or 40% by mass or more, and 60% by mass or less, or 50% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. The water content may be 35% by mass or more and 60% by mass or less, or 40% by mass or more and 50% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. polyol

[0036] A polyol refers to an aliphatic compound having two or more hydroxyl groups (-OH). The number of hydroxyl groups in a polyol may be two or more, for example, three or more, and may be 10 or less, 8 or less, 6 or less, or 4 or less.

[0037] The number of carbon atoms in a polyol may be, for example, 1 or more, 2 or more, or 3 or more, and may be 10 or less, 8 or less, or 6 or less. The number of carbon atoms in a polyol may be 2 or more and 10 or less, 2 or more and 8 or less, or 2 or more and 6 or less. A polyol is a polyol with 1 to 6 carbon atoms. 1- It is preferable that it be a C6 polyol.

[0038] Examples of polyols include butylene glycol (1,3-butylene glycol, etc.), pentylene glycol (1,2-pentanediol, etc.), glycerin, propanediol (1,3-propanediol, propylene glycol, or mixtures thereof), dipropylene glycol, sorbitol, and mixtures thereof.

[0039] The oil-in-water emulsion gel composition may contain one polyol, or it may contain a combination of two or more polyols. The polyol preferably contains at least one selected from the group consisting of butylene glycol, pentylene glycol, glycerin, propanediol (1,3-propanediol, propylene glycol, or mixtures thereof), dipropylene glycol, sorbitol, and mixtures thereof; more preferably contains two or more selected from the group consisting of butylene glycol, pentylene glycol, glycerin, and propanediol (1,3-propanediol, propylene glycol, or mixtures thereof), dipropylene glycol, and sorbitol; and even more preferably contains butylene glycol, pentylene glycol, glycerin, propanediol (1,3-propanediol, propylene glycol, or mixtures thereof), dipropylene glycol, and sorbitol.

[0040] In certain embodiments, the total polyol content may be 1% by mass or more, 5% by mass or more, 8% by mass or more, or 10% by mass or more, and 25% by mass or less, 20% by mass or less, or 15% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. In certain embodiments, the total polyol content is 1% by mass or more and 25% by mass or less, 5% by mass or more and 25% by mass or less, 8% by mass or more and 20% by mass or less, 10% by mass or more and 20% by mass or less, or 10% by mass or more and 15% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. Anionic surfactants

[0041] Anionic surfactants are surfactants that have an ionic dissociation group (anionic dissociation group) as a hydrophilic group, which dissociates in water to become an anion. Examples of anionic dissociation groups include carboxyl groups (-COOH), sulfo groups (-SO3H), and phosphate groups (-OPO(OH)2). From the viewpoint of further improving the effects of the present invention, anionic surfactants may have a carboxyl group as the anionic dissociation group. The number of anionic dissociation groups in an anionic surfactant may be, for example, 1 or more, 2 or more, 5 or less, or 4 or less. The number of anionic dissociation groups in an anionic surfactant may be, for example, 1 to 5, 2 to 5, 1 to 4, or 2 to 4. Anionic surfactants may have an aliphatic hydrocarbon group as a hydrophobic group (a group having hydrophobicity). The aliphatic hydrocarbon group may be linear or branched. The aliphatic hydrocarbon group is preferably linear. The number of carbon atoms in the aliphatic hydrocarbon group may be 5 to 30, or 10 to 25.

[0042] In certain embodiments, the anionic surfactant may be an amino acid-based anionic surfactant, from the viewpoint of further enhancing the effects of the present invention. An amino acid-based anionic surfactant is an anionic surfactant having an amino acid residue as a substructure. Examples of amino acids include glutamic acid and lysine. The anionic surfactant may have glutamic acid residues and / or lysine residues. The anionic dissociation group in the anionic surfactant may be a carboxyl group derived from an amino acid residue.

[0043] Examples of amino acid-based anionic surfactants include N-acyl glutamates such as N-lauroyl glutamate, N-myristoyl glutamate (N-myristoyl-L-glutamate, etc.), and N-stearoyl glutamate (e.g., sodium N-stearoyl glutamate); N-acyl glycine salts such as N-lauroyl glycine salt, N-myristoyl glycine salt, and N-stearoyl glycine salt; N-acyl alanine salts such as N-lauroyl alanine salt, N-myristoyl alanine salt, and N-stearoyl alanine salt; N-acyl aspartates such as N-lauroyl aspartate, N-myristoyl aspartate, and N-stearoyl aspartate; diacyl glutamate lysine salts such as dilauroyl glutamate lysine salt (e.g., sodium dilauroyl glutamate lysine); surfactant sodium; and mixtures thereof.

[0044] In addition, other anionic surfactants that can be used include fatty acid soaps such as laurate and palmitate; phosphate ester salts such as cetyl phosphate; long-chain acyl lower alkyl type taurine salts such as N-cocoyl-N-methyl taurine salt, N-lauroyl-N-methyl taurine salt, N-myristoyl-N-methyl taurine salt, N-stearoyl-N-methyl taurine salt, N-cocoyl taurine salt, and mixtures thereof.

[0045] In certain preferred embodiments, the composition of the present invention comprises an amino acid-based anionic surfactant, preferably containing at least one selected from the group consisting of N-stearoyl glutamate, dilauroyl glutamate lysine salt, and mixtures thereof, and more preferably containing an N-acyl glutamate such as sodium N-stearoyl glutamate for even better color vibrancy of the coated film.

[0046] The total content of the anionic surfactant may be 0.1% by mass or more, 0.5% by mass or more, 0.8% by mass or more, 1.0% by mass or more, or 1.2% by mass or more, based on the total mass of the oil-in-water emulsion gel composition, and may be 10% by mass or less, 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or 1.8% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. In a particular embodiment, the total content of the anionic surfactant is 0.1% by mass or more and 10% by mass or less, 0.5% by mass or more and 5% by mass or less, 0.8% by mass or more and 4% by mass or less, 1.0% by mass or more and 2.0% by mass or less, or 1.2% by mass or more and 1.8% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. amphiphilic polymers

[0047] The oil-in-water emulsion gel composition contains an amphiphilic polymer. An amphiphilic polymer is a polymer that has both hydrophobic and hydrophilic groups.

[0048] As for hydrophobic groups, C1~C 30 Examples of hydrocarbon groups include C1~C 30 Typical examples include linear or branched alkyl groups. The number of carbon atoms is preferably 6 to 30, and more preferably 12 to 24.

[0049] Examples of linear or branched alkyl groups that fall under the above categories include dodecyl group (lauryl group), tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group, docosyl group (behenyl group), and decyltetradecyl group.

[0050] The hydrophilic group may be, for example, an ionic dissociation group (e.g., a carboxyl group, a sulfo group) or a nonionic dissociation group. The amphiphilic polymer may have hydrophilic residues of hydrophilic molecules such as polyalkylene glycol (e.g., polyethylene glycol, polypropylene glycol), polyglycerin, or polysaccharides as hydrophilic groups.

[0051] In certain embodiments, the amphiphilic polymer is, for example, at least one selected from the group consisting of hydrophobic-modified hydrophilic urethane polymers, (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups, hydrophobic-modified hydrophilic polysaccharides, and mixtures thereof. In certain embodiments, the composition of the present invention comprises at least one amphiphilic polymer selected from the group consisting of hydrophobic-modified hydrophilic urethane polymers, (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups, and hydrophobic-modified hydrophilic polysaccharides, and preferably at least one selected from the group consisting of hydrophobic-modified hydrophilic urethane polymers and (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups. In certain preferred embodiments, the composition of the present invention comprises a hydrophobic-modified hydrophilic urethane polymer and a (meth)acrylic polymer having side chains containing hydrophilic and hydrophobic groups. In amphiphilic polymers, hydrophobic modification means that hydrophobic groups are attached to the molecule.

[0052] Examples of hydrophobic group-modified hydrophilic urethane polymers include hydrophobic group-modified polyether urethanes containing polyethylene glycol as a glycol component. Useful examples of such urethane polymers include those in which the aforementioned hydrophobic groups are introduced to the terminals or side chains of hydrophilic urethane polymers having PEO blocks, PEO / PPO blocks, PEO / PPO / PEO blocks, PPO / PEO / PPO blocks, etc. Note that PEO refers to polyoxyethylene and PPO refers to polyoxypropylene; PEO may also be written as PEG and PPO as PPG. Furthermore, aromatic isocyanates, aliphatic isocyanates, and alicyclic isocyanates can all be used as the isocyanates forming the urethane.

[0053] Examples of hydrophobic group-modified hydrophilic urethane polymers include (PEG-240 / decyltetradeceth-20 / HDI) copolymer (product name: ADEKA NOL GT-700), (PEG-150 / decyl alcohol / saturated bismethylenediphenyl isocyanate (SMDI)) copolymer (product name: Aculyn 44), and (PEG-150 / stearyl alcohol / SMDI) copolymer (product name: Aculyn 46N).

[0054] In the context of amphiphilic polymers, (meth)acrylic polymers refer to those that contain (meth)acrylic monomers as the main monomer units.

[0055] Examples of (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups include (meth)acrylic polymers having side chains containing hydrophilic groups but not hydrophobic groups (hydrophilic side chains) and side chains containing hydrophobic groups but not hydrophilic groups (hydrophobic side chains), and (meth)acrylic polymers having side chains containing hydrophilic and hydrophobic groups (amphiphilic side chains). Examples of hydrophilic groups include carboxyl groups (-COOH) and sulfonic acid groups (-SO3H).

[0056] (Meth)acrylic polymers having hydrophilic and hydrophobic side chains have monomer units containing hydrophilic groups but not hydrophobic groups, and monomer units containing hydrophobic groups but not hydrophilic groups. In this specification, a (meth)acrylic monomer consists of an ethylenically unsaturated group (CR=CH2-, where R represents a hydrogen atom or a methyl group) as a reactive site in the (meth)acrylic group, and a side chain group bonded to the ethylenically unsaturated group.

[0057] Hydrophobic groups may be bonded to the main chain via ester bonds (-COO-). Examples of hydrophobic groups include alkyl groups. The number of carbon atoms in the alkyl group in the hydrophobic group may be, for example, 1 to 22.

[0058] (Meth)acrylic polymers having hydrophilic and hydrophobic side chains may, for example, have (meth)acrylic acid and alkyl (meth)acrylate as monomer units. Particularly suitable (meth)acrylic polymers having hydrophilic and hydrophobic side chains include (acrylates / beheneth-25 methacrylate) copolymers (e.g., trade name: Aculyn 28), some of which are preferably used in combination with a base such as sodium hydroxide and neutralized.

[0059] (Meth)acrylic polymers having amphiphilic side chains have monomer units containing hydrophilic and hydrophobic groups. The amphiphilic side chains may be bonded to the main chain, for example, via amide bonds (-CONH-). The amphiphilic side chains may have a sulfonic acid group as the hydrophilic group and an alkylene group as the hydrophobic group. The number of carbon atoms in the alkylene group in the amphiphilic side chain may be, for example, 3 to 6, and the alkylene group may be, for example, -C(CH3)2-CH2-. The amphiphilic side chains may have alkyl sulfonic acid groups (for example, -C(CH3)2-CH2-SO3H).

[0060] An amphiphilic (meth)acrylic polymer having an amphiphilic side chain may be, for example, a (meth)acrylic polymer having a monomer unit of (meth)acrylamide substituted with substituents containing hydrophilic and hydrophobic groups. Examples of such substituents include alkyl-substituted aminoalkylsulfonic acid groups such as alkyl-substituted taurine groups. An example of an alkyl-substituted taurine group is the dimethyl taurine group (-NH-C(CH3)2-CH2-SO3H). The alkyl-substituted taurine group constitutes a side chain, with -SO3H (or its salt) being the hydrophilic group and the portion between -NH and -SO3H (or its salt) being the hydrophobic group.

[0061] (Meth)acrylic polymers having amphiphilic side chains may further have monomer units other than amphiphilic monomer units (other monomer units). Examples of other monomer units include monomer units derived from vinyl monomers and monomer units derived from (meth)acrylic monomers. An example of a vinyl monomer is N-vinylpyrrolidone. An example of a (meth)acrylic monomer is hydroxyethyl (meth)acrylate.

[0062] As an example of a (meth)acrylic polymer having amphiphilic side chains, a useful (meth)acrylic polymer is one having N-vinylpyrrolidone and (meth)acrylamide substituted with substituents containing hydrophilic and hydrophobic groups as monomer units. An example of such a component is (acryloyldimethyltaurate ammonium / VP) copolymer (trade name: ARISTOFLEX AVC).

[0063] As an example of a (meth)acrylic polymer having amphiphilic side chains, a useful (meth)acrylic polymer is one having hydroxyethyl (meth)acrylate and (meth)acrylamide substituted with substituents containing hydrophilic and hydrophobic groups as monomer units. An example of such a component is (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer (trade name: SIMULGEL NS).

[0064] As hydrophobic group-modified hydrophilic polysaccharides, hydroxyalkylalkylcellulose such as hydroxypropylmethylcellulose, modified with the aforementioned hydrophobic groups, is useful. An example of such a component is hydrophobic hydroxypropylmethylcellulose (product name: SANGELOSE 90L), in which the hydrophobic group is a stearoyl group.

[0065] In certain embodiments, the oil-in-water emulsion gel composition comprises one amphiphilic polymer or a combination of two or more.

[0066] The oil-in-water emulsion gel composition may contain, from the viewpoint of further improving the vividness of the color of the coated film and the nourishing effect, a hydrophobic group-modified hydrophilic urethane polymer and a (meth)acrylic polymer having side chains containing hydrophilic and hydrophobic groups as amphiphilic polymers, and further contains a hydrophobic group-modified hydrophilic urethane polymer and a (meth)acrylic polymer having hydroxyethyl (meth)acrylate and (meth)acrylamide substituted with substituents containing hydrophilic and hydrophobic groups as monomer units.

[0067] The total content of the amphiphilic polymer may be 0.01% by mass or more, or 0.03% by mass or more, and may be 5.0% by mass or less, 2% by mass or less, 1.0% by mass or less, or 0.5% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. In a particular embodiment, the total content of the amphiphilic polymer is 0.01% by mass or more and 5.0% by mass or less, or 0.03% by mass or more and 1.5% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. coloring material

[0068] The oil-in-water emulsion gel composition further comprises at least one coloring material. In this invention, “coloring material” means a compound that can produce a colored optical effect when formulated in a sufficient amount in a suitable cosmetic medium. The coloring material may be natural or non-natural, water-soluble or insoluble, oil-soluble or insoluble, or organic or inorganic. In certain embodiments, the coloring material in the present invention is selected from the group consisting of dyes, pigments, pearlescent pigments, and mixtures thereof. In certain embodiments, the oil-in-water emulsion gel composition of the present invention comprises a coloring material selected from dyes, pigments, pearlescent pigments, or mixtures thereof. In certain preferred embodiments, the oil-in-water emulsion gel composition of the present invention comprises at least a dye. The term "dye" here refers specifically to dyes commonly used in the cosmetics industry, and is different from food dyes used in food products. Examples of dyes include Japanese Red No. 227 (FDA: D&C RED33, CI: 17200), Japanese Red No. 104 (FDA: D&C RED28, CI: 45410), Japanese Yellow No. 4 (FDA: D&C YELLOW 5, CI: 19140), Japanese Yellow No. 5 (FDA: D&C YELLOW 6, CI: 15985), and Japanese Blue No. 1 (FDA: D&C BLUE 1, CI: 42090). Other examples include Green 5, Green 3, Green 6, Orange 4, Red 4, Red 21, Red 22, Red 27, Red 28, Red 33, Red 40, and lipid-soluble dyes such as Red Sudan, β-carotene, Brown Sudan, Quinoline Yellow, and Rococo. The total dye content may be set appropriately depending on the intended use of the oil-in-water emulsion gel composition. In a particular embodiment, the total dye content is 0.001% by mass or more and 1.0% by mass or less, or 0.01% by mass or more and 0.5% by mass or less, based on the total mass of the oil-in-water emulsion gel composition.

[0069] The oil-in-water emulsion gel composition may further contain at least one pigment. “Pigment” means white or colored particles, or minerals or organic substances intended to color and / or opaque the coated film. The pigment may be an organic pigment or an inorganic pigment. Examples of pigments include organic pigments such as Japanese Red No. 201 (FDA name: D&C RED 6, CI: 15850), Japanese Red No. 202 (FDA name: D&C RED 7, CI: 15850), Japanese Red No. 226 (FDA name: D&C RED 30, CI: 73360), D&C Red n°27; D&C Red n°22; D&C Red n°21; D&C Red n°28; D&C Orange n°4; D&C Red n°33; D&C Yellow n°5; D&C Red n°36; D&C Yellow n°6; D&C Blue 1, as well as inorganic pigments such as titanium dioxide, black iron oxide, yellow iron oxide, red iron oxide, and manganese violet. The pigment content may be appropriately set depending on the application of the oil-in-water emulsion gel composition. In certain embodiments, the total pigment content is 0.01% to 5.0% by mass, 0.01% to 3.0% by mass, or 0.01% to 1.0% by mass, based on the total mass of the oil-in-water emulsion gel composition. The “pearlescent pigment” may be selected from titanium mica having iron oxide, titanium mica having the aforementioned type of organic pigment, and white pearlescent pigments coated with titanium oxide, bismuth oxychloride, and colored pearlescent pigments, as well as pigments based on bismuth oxychloride. The pearlescent pigment may also have a silica, alumina, alumina hydroxide, synthetic mica, tin oxide, or borosilicate base.

[0070] In certain embodiments, the oil-in-water emulsion gel composition further contains a higher aliphatic monohydric alcohol from the viewpoint of further improving the vividness of the coated film. A higher aliphatic monohydric alcohol means a chain alcohol having 6 or more carbon atoms and having one hydroxyl group. The higher aliphatic monohydric alcohol may be a saturated alcohol that does not have an unsaturated bond. The number of carbon atoms of the higher aliphatic monohydric alcohol may be 8 or more, 12 or more, or 14 or more, and may be 30 or less, 20 or less, or 18 or less. Examples of higher alcohols include cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and lauryl alcohol. In certain preferred embodiments, the composition of the present invention contains cetyl alcohol from the viewpoint of further improving the vividness of the coated film.

[0071] The total content of higher aliphatic monohydric alcohols may be 0.01% by mass or more, or 0.1% by mass or more, and 3% by mass or less, or 1% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. In a particular embodiment, the content of higher aliphatic monohydric alcohols is 0.01% by mass or more and 3% by mass or less, or 0.1% by mass or more and 1% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. Additional ingredients

[0072] The oil-in-water emulsion gel composition may contain other components besides those described above. Examples of other components include preservatives, pH adjusters, fragrances, antioxidants, and chelating agents.

[0073] Phenoxyethanol is an example of a preservative. The amount of preservative may be set appropriately depending on the intended use of the cosmetic, the type of preservative, etc. For example, the amount of preservative may be 0.01% to 2.0% by mass, or 0.1% to 1.0% by mass, based on the total mass of the oil-in-water emulsion gel composition. viscosity

[0074] The viscosity of the oil-in-water emulsion gel composition may be 20,000 to 400,000 cps at 25°C, and preferably 50,000 to 400,000 cps at 25°C. The viscosity of the oil-in-water emulsion gel composition of the present invention can be measured based on shear viscosity under conditions of 10 rpm using a rotational viscometer (Rheolab QC by Anton Paar GmbH), and the viscosity measured at 25°C for 7 minutes using an ST22-2V-19 / 110 measuring instrument can be recorded. By having the viscosity of the oil-in-water emulsion gel composition at 25°C within this range, the vividness of the color, nourishing effect, and stability of the coated film are further improved. The viscosity of the oil-in-water emulsion gel composition at 25°C may be, for example, 20,000 cps or more, 30,000 cps or more, 40,000 cps or more, 50,000 cps or more, 75,000 cps or more, 100,000 cps or more, 120,000 cps or more, 140,000 cps or more, or 150,000 cps or more, and may be 400,000 cps or less, 350,000 cps or less, 300,000 cps or less, 250,000 cps or less, 200,000 cps or less, or 180,000 cps or less. In certain embodiments, the viscosity of the oil-in-water emulsion gel composition at 25°C may be 30,000 to 350,000 cps, preferably 40,000 to 300,000 cps, and more preferably 50,000 to 250,000 cps. In preferred embodiments, the viscosity of the oil-in-water emulsion gel composition at 25°C may be 75,000 to 300,000 cps, or 100,000 to 300,000 cps, or 140,000 to 300,000 cps, from the viewpoint of further improving the vividness of the coated film, nourishing effect, and stability. Emulsification process

[0075] In certain embodiments, the oil-in-water emulsion gel composition can be obtained by emulsifying at a pressure of 50 MPa or higher. The emulsifying pressure may be, for example, 100 MPa or higher, or 150 MPa or higher, or 500 MPa or lower, 400 MPa or lower, 300 MPa or lower, or 250 MPa or lower, or 200 MPa. The emulsifying temperature may be, for example, 20°C or higher, or 30°C or higher, or 80°C or lower, 70°C or lower, or 40°C or lower.

[0076] In certain embodiments, such emulsification is performed using a high-pressure emulsifier. Here, a high-pressure emulsifier is a device that performs emulsification by pressurizing a fluid with a pump and ejecting it from fine particles installed in the flow path. An example of a high-pressure emulsifier is the Starburst Mini (manufactured by Sugino Machine Co., Ltd.).

[0077] The method for producing the oil-in-water emulsion gel composition of the embodiment includes, for example, a step of high-pressure emulsification of a mixture containing at least an oil, water, and an anionic surfactant. Each of the above-mentioned components may be included in the mixture before high-pressure emulsification, or in the emulsion obtained after high-pressure emulsification.

[0078] The oil-in-water emulsion gel composition of the embodiment may include, for example, a step of mixing a first liquid containing water and an anionic surfactant with a second liquid containing an oil to obtain a mixed liquid containing the oil, water, and an anionic surfactant (mixing step), and a step of high-pressure emulsification of the mixed liquid to obtain an emulsion (high-pressure emulsification step). Each of the above-mentioned components may be included by mixing with the first liquid, by mixing with the second liquid, by mixing with the mixed liquid, or by mixing with the emulsion.

[0079] From the viewpoint of further improving the vividness of the color and nourishing effect of the coated film, the amphiphilic polymer may be included by mixing it with at least the first liquid, or it may be included by mixing it with the emulsion in addition to the first liquid.

[0080] It is preferable to include the polyol in the oil-in-water emulsion gel composition by mixing it with the first liquid. It is preferable to include the coloring material, such as dyes and pigments, in the oil-in-water emulsion gel composition by mixing it with the emulsifier. It is preferable to include the higher aliphatic monohydric alcohol in the oil-in-water emulsion gel composition by mixing it with the second liquid.

[0081] The amphiphilic polymer mixed in the first liquid (first amphiphilic polymer) may be the same as or different from the amphiphilic polymer mixed in the emulsion (second amphiphilic polymer), but it is preferable that they be different. The first amphiphilic polymer preferably includes a hydrophobic group-modified hydrophilic urethane polymer and / or a (meth)acrylic polymer having side chains containing hydrophilic and hydrophobic groups, and the second amphiphilic polymer preferably includes a (meth)acrylic polymer having side chains containing hydrophobic groups. [Examples]

[0082] The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

[0083] <Preparation of oil-in-water cosmetic composition in the example> The components shown in column A of the table (component A) and the components shown in column B of the table (component B) were mixed and stirred at 70°C using a homogenizer. The components shown in column C of the table (component C) were mixed at 70°C using a homogenizer, and this mixture was mixed with the mixture of components A and B using a homogenizer at 70°C. After the mixture of components A to C was cooled to 30°C, it was emulsified under high pressure using a high-pressure emulsifier (e.g., Star Burst Mini: manufactured by Sugino Machine Co., Ltd.). The pressure used for emulsification was 200 MPa for Examples 1, 4-17, and 19-20, 50 MPa for Example 2, and 100 MPa for Example 3. In Examples 9, 14, and 20, the component shown in column D of the table (component D) was further added to the mixture after high-pressure emulsification at room temperature. The component shown in column E of the table (component E) was added to the mixture after high-pressure emulsification or after the addition of component D, and mixed using a homogenizer. This yielded the oil-in-water cosmetic compositions of Examples 1-17 and 19.

[0084] Except for not adding the component shown in column B of the table (component B), and adding the component shown in column F of the table (component F) together with component E to the mixture after high-pressure emulsification, Example 18 of the oil-in-water cosmetic composition was obtained in the same manner as in Example 1.

[0085] The oil-in-water cosmetic compositions of Examples 1 to 20, obtained by the manufacturing method described above, were all gel-like. Confirmation of gel-like consistency was performed by placing 0.5 g of the oil-in-water cosmetic composition on an inclined surface tilted at 30 degrees relative to a horizontal plane and confirming that it did not flow for 1 hour under 25°C conditions. The non-flow of the oil-in-water cosmetic composition was confirmed visually.

[0086] The content (mass %) of each component shown in Tables 1-3 represents the content relative to the total mass of the oil-in-water emulsion cosmetic.

[0087] <Preparation of oil-in-water cosmetic in comparative example> Comparative Example 1, an oil-in-water cosmetic composition, was obtained in the same manner as in Example 18, except that it did not contain the (PEG-240 / decyltetradeceth-20 / HDI) copolymer, which is an essential feature of the composition of the present invention as an amphiphilic polymer.

[0088] Comparative Example 2, an oil-in-water cosmetic composition, was obtained in the same manner as in Example 1, except that it contained a nonionic surfactant (PEG-60 hydrogenated castor oil) instead of the anionic surfactant (sodium stearoyl glutamate), which is an essential feature of the composition of the present invention.

[0089] Neither of the oil-in-water cosmetic compositions obtained by the above manufacturing method, Comparative Example 1 and Comparative Example 2, were gel compositions. This was confirmed in the same manner as the oil-in-water emulsion gel composition in the Examples.

[0090] <Viscosity measurement> The viscosity of the oil-in-water emulsion gel compositions in the examples and comparative examples was determined by shear viscosity measurement using a rotational viscometer (Rheolab QC, manufactured by Anton Paar K.K.), measured at a rotational speed of 10 rpm using a measuring jig ST22-2V-19 / 110 at 25°C for 7 minutes.

[0091] <Sensory evaluation> Sensory evaluations were conducted on the oil-in-water cosmetic compositions of the examples and comparative examples. The evaluation criteria for fresh and light texture, vividness of the applied film (makeup film), and nourishing effect were assessed by a panel of 10 cosmetic experts (ages 25-55) from the organization to which the inventors belong, based on a single application to the lips, according to the following criteria. The results are shown in Tables 1-3. A rating of A-C indicates superior performance. A: Very good B: Better C: Good D: Not accepted E: Not good F: Bad

[0092] The above sensory evaluation was conducted by applying the oil-in-water cosmetic to the lips using a flocked tip to which the cosmetic had been attached. A flocked tip is a type of applicator commonly used for applying liquid lipstick. The oil-in-water cosmetic was attached to the flocked tip by impregnating it with an appropriate amount of the oil-in-water cosmetic of the example or comparative example.

[0093] The better the evaluation of fresh and light texture, the more fresh and light the product feels. The vividness of the applied film (makeup film) is evaluated using the vividness derived from the uniformity of the applied film (cosmetic film) as an indicator. The better the evaluation of the vividness of the applied film (makeup film), the easier it is to form a uniform cosmetic film, which makes the color appear more vivid. The nourishing effect is evaluated using the moisturizing and non-drying sensations felt after the cosmetic has dried as an indicator. The better the evaluation of the nourishing effect, the less dry and more moisturizing the oil-in-water cosmetic feels after it has dried.

[0094] The stability of the oil-in-water emulsion cosmetic compositions of the examples and comparative examples was evaluated. Stability was evaluated by leaving the oil-in-water emulsion cosmetic composition to stand at 50°C for 28 days and visually observing the appearance of the composition after standing. If separation occurred in the oil-in-water emulsion cosmetic composition as a result of the visual observation, it was evaluated as "B," and if no change in appearance was observed, it was evaluated as "A." An evaluation of A indicates excellent stability.

[0095] Table 1 shows 14 examples of oil-in-water emulsion gel compositions of the present invention. All of these compositions contain an oil, an anionic surfactant, a polyol, an amphiphilic polymer, water, a dye and a pigment, and optionally a second amphiphilic polymer (Examples 9 and 14) or a higher aliphatic monohydric alcohol (cetyl alcohol in Example 10). These compositions exhibit a fresh and light feel, vivid coloration of the coated film, nourishing effect, and good stability. The best performance was obtained with compositions containing two different types of amphiphilic polymers. [Table 1]

[0096] Table 2 further discloses three examples of oil-in-water emulsion gel compositions of the present invention, where different amphiphilic polymers are exemplified. These three compositions have a fresh and light feel, vivid color of the coated film, nourishing effect, and good stability. [Table 2]

[0097] Table 3 further discloses three examples of oil-in-water emulsion gel compositions and two examples of comparative examples of the present invention, where Comparative Example 1 shows a case where the composition does not contain an amphiphilic polymer, and Comparative Example 2 shows a case where the surfactant is not an anionic surfactant. [Table 3]

[0098] *1: AMISOFT HS-11PF (product name, manufactured by Ajinomoto Co., Inc.), *2: PELICER L-30 (product name, manufactured by Asahi Kasei Corporation), *3: ADEKANOL GT-700 (product name, manufactured by ADEKA Corporation), *4: ACULYN 44 (product name, manufactured by Dow Chemical Company), *5: ACULYN 46N (product name, manufactured by Dow Chemical Company), *6: ACULYN 28 (product name, manufactured by Dow Chemical Company), *7: TMF-1.5 (product name, manufactured by Shin-Etsu Chemical Co., Ltd.), *8: SIMULGEL NS (product name, manufactured by Sepic), *9: SYMPHOLIGHT WW (product name, manufactured by JGC Corporation), *10: ARISTOFLEX AVC (product name, manufactured by CLARIANT), *11: SANGELOSE 90L (product name, manufactured by Daido Chemical Co., Ltd.).

[0099] The results of the comparative examples show that, in oil-in-water emulsions containing oils, polyols, dyes, and pigments, the presence of both anionic surfactants and amphiphilic polymers is necessary, or rather, essential, for obtaining the oil-in-water emulsion gel composition according to the present invention, which has a fresh and light feel, vivid color of the coated film, nourishing effect, and good stability.

Claims

1. The material contains an oil that is liquid at 25°C, water, a polyol, an anionic surfactant, a mixture of amphiphilic polymers, and a coloring material, wherein the mixture of amphiphilic polymers includes a hydrophobic group-modified hydrophilic urethane polymer and a (meth)acrylic polymer having side chains containing hydrophilic and hydrophobic groups. The total content of the oily agent is 25% by mass or more, based on the total mass of the oil-in-water emulsion gel composition. The total content of the anionic surfactant is 0.1% by mass or more and 2.0% by mass or less, based on the total mass of the oil-in-water emulsion gel composition. An oil-in-water emulsion gel composition in which the total content of the amphiphilic polymer mixture is 0.03% by mass or more and 0.5% by mass or less, based on the total mass of the oil-in-water emulsion gel composition.

2. The oil-in-water emulsion gel composition according to claim 1, wherein the polyol is a C1-C6 polyol.

3. The oil-in-water emulsion gel composition according to claim 1 or 2, wherein the polyol is selected from the group consisting of pentylene glycol, butylene glycol, glycerin, propanediol, dipropylene glycol, sorbitol, and mixtures thereof.

4. The oil-in-water emulsion gel composition according to any one of claims 1 to 3, wherein the anionic surfactant is an amino acid-based anionic surfactant.

5. The oil-in-water emulsion gel composition according to claim 4, wherein the amino acid-based anionic surfactant is selected from the group consisting of N-stearoyl glutamate, dilauroyl glutamate lysine salt, and mixtures thereof.

6. The oil-in-water emulsion gel composition according to any one of claims 1 to 5, wherein the total content of the oil is 30% by mass or more and 50% by mass or less, based on the total mass of the oil-in-water emulsion gel composition.

7. The oil-in-water emulsion gel composition according to claim 1, wherein the hydrophobic group-modified hydrophilic urethane polymer comprises a hydrophobic group-modified polyether urethane containing polyethylene glycol or polypropylene glycol as a glycol component.

8. The oil-in-water emulsion gel composition according to claim 1, wherein the mixture of amphiphilic polymers comprises (PEG-240 / decyltetradeceth-20 / HDI) copolymer and (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer.

9. The oil-in-water emulsion gel composition according to any one of claims 1 to 8, wherein the coloring material is selected from the group consisting of dyes, pigments, pearlescent or pearlescent pigments, and mixtures thereof.

10. An oil-in-water emulsion gel composition according to any one of claims 1 to 9, further containing a higher aliphatic monohydric alcohol having 12 to 30 carbon atoms.

11. An oil-in-water emulsion gel composition according to any one of claims 1 to 10, wherein the viscosity at 25°C is in the range of 20,000 to 400,000 cps.

12. The oil-in-water emulsion gel composition according to claim 11, wherein the viscosity at 25°C is in the range of 50,000 to 400,000 cps.

13. An oil-in-water emulsion gel composition for use on the lips, according to any one of claims 1 to 12.

14. A method for producing an oil-in-water emulsion gel composition according to any one of claims 1 to 13, A method comprising emulsifying the oil-in-water emulsion gel composition at a pressure of 50 MPa or higher to obtain the oil-in-water emulsion gel composition.

15. The method according to claim 14, wherein the pressure is 100 MPa or more and 400 MPa or less.

16. A cosmetic method for caring for and / or makeuping a keratin substance, comprising applying an oil-in-water emulsion gel composition according to any one of claims 1 to 13 or an oil-in-water emulsion gel composition obtained by the method according to claim 14 or 15 to a keratin substance.

17. The cosmetic method according to claim 16, wherein the oil-in-water emulsion gel composition is applied to the skin or lips.

Images