CN120168345A

CN120168345A - Oil-in-water emulsified solid cosmetics

Info

Publication number: CN120168345A
Application number: CN202411828391.6A
Authority: CN
Inventors: 林绍龙
Original assignee: Tokiwa Corp
Current assignee: Tokiwa Corp
Priority date: 2023-12-20
Filing date: 2024-12-12
Publication date: 2025-06-20
Also published as: JP2025098497A

Abstract

本发明提供水包油型乳化固体化妆料，其能够得到容易取用、容易延展、化妆不均匀得到充分抑制、化妆持久性也优异的化妆效果，且经时稳定性也优异。水包油型乳化固体化妆料含有：(A)熔点为40℃以上的脂肪族醇；(B)表面活性剂；(C)水溶性固化剂；以及(D)包含丙烯酰二甲基牛磺酸盐作为结构单元的聚丙烯酰胺共聚物，(B)成分包含(B－1)氢化卵磷脂和(B－2)HLB为8以上的表面活性剂(其中，(B－1)成分除外)，(A)成分的含量与(B－1)成分和(B－2)成分的合计含量的质量比(A)/[(B－1)+(B－2)]为1.2～9。The present invention provides an oil-in-water emulsified solid cosmetic material, which can obtain a cosmetic effect that is easy to take, easy to spread, has a sufficiently suppressed uneven makeup, and has excellent makeup durability, and also has excellent stability over time. The oil-in-water emulsified solid cosmetic material contains: (A) an aliphatic alcohol having a melting point of 40°C or higher; (B) a surfactant; (C) a water-soluble curing agent; and (D) a polyacrylamide copolymer containing acryloyldimethyl taurate as a structural unit, wherein the component (B) contains (B-1) hydrogenated lecithin and (B-2) a surfactant having an HLB of 8 or higher (wherein the component (B-1) is excluded), and the mass ratio (A)/[(B-1)+(B-2)] of the content of the component (A) to the total content of the components (B-1) and (B-2) is 1.2 to 9.

Description

Oil-in-water type emulsified solid cosmetic

Technical Field

The present invention relates to an oil-in-water emulsified solid cosmetic composition.

Background

The oil-in-water emulsion cosmetic has a characteristic that the external phase is water, and thus it gives a moist feel to the skin when applied to the skin, and is easily spread on the skin. Oil-in-water emulsion cosmetics are also used as make-up cosmetics such as blush, eye shadow, foundation, and lipstick, and are filled in many containers such as tube containers and bottle containers.

In recent years, in addition to these cosmetic forms, there has been proposed an oil-in-water type emulsified solid cosmetic which is prepared in a solid form by using a water-soluble solidifying agent such as agar, gelatin, and carrageenan (for example, patent document 1 below). In the case of a solid cosmetic, the cosmetic filled in a metal dish or the like can be used in a form of being contained in a small container, and portability is excellent.

Prior art literature

Patent literature

Patent document 1 Japanese patent laid-open No. 5-178723

However, the conventional oil-in-water emulsified solid cosmetic compositions cured with a water-soluble curing agent have a problem that fingers and applicators tend to slip on the surface of the cosmetic composition during the process of taking the cosmetic composition, and it is difficult to take a proper amount of the cosmetic composition. Further, conventional oil-in-water emulsion solid cosmetics tend to have a slippery surface and are difficult to adhere to the skin, and it is difficult to achieve both of easy extensibility and uniform cosmetic effects. Specifically, when a cosmetic having poor makeup on the skin is spread, the cosmetic adheres unevenly (hereinafter, sometimes referred to as "pseudo-slip") and the color cosmetic containing the color material is unevenly applied. Furthermore, the conventional oil-in-water emulsified solid cosmetic has room for improvement in terms of cosmetic durability. In addition, oil-in-water emulsified solid cosmetic materials are prone to evaporation of water and deterioration over time, and it is difficult to maintain the initial feel in use over a long period of time.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide an oil-in-water type emulsified solid cosmetic material which can obtain a cosmetic effect that is easy to use, easy to spread, sufficiently suppresses cosmetic unevenness, and is excellent in cosmetic durability and also excellent in stability with time.

In order to solve the above problems, the following invention is provided.

[1] An oil-in-water emulsified solid cosmetic composition comprising (A) an aliphatic alcohol having a melting point of 40 ℃ or higher, (B) a surfactant, (C) a water-soluble curing agent, and (D) a polyacrylamide copolymer comprising an acryloyldimethyl taurate as a structural unit, wherein the component (B) comprises (B-1) hydrogenated lecithin and (B-2) a surfactant having an HLB of 8 or higher (except the component (B-1), and the mass ratio (A)/([ (B-1) + (B-2) ] of the content of the component (A) to the total content of the component (B-1) and the component (B-2) is 1.2 to 9.

[2] The oil-in-water type emulsified solid cosmetic composition according to [1], wherein the mass ratio (B-1)/(B-2) of the content of the component (B-1) to the content of the component (B-2) is 1 to 10.

[3] The oil-in-water type emulsified solid cosmetic composition according to [1] or [2], wherein the component (C) comprises agar, and the content of the agar is 0.6 to 3.0% by mass based on the total amount of the oil-in-water type emulsified solid cosmetic composition.

[4] The oil-in-water type emulsified solid cosmetic composition according to any one of [1] to [3], wherein the content of the solid oil other than the component (A) is 2% by mass or less based on the total amount of the oil-in-water type emulsified solid cosmetic composition.

The oil-in-water type emulsified solid cosmetic composition of [1] above, which has an easy-to-use, easily extensible and sufficiently suppressed cosmetic unevenness, and has excellent cosmetic effect and long-lasting cosmetic properties and excellent stability over time. The reason for such an effect is presumed as follows. It is considered that the oil-in-water emulsion solid cosmetic is applied by a composite gel comprising an alpha gel formed from the component (A), the component (B-1) and the component (B-2) contained in the specific ratio and a gel formed from the component (C), and the gel structure is easily broken at the time of application, so that the cosmetic is sufficiently suppressed from being applied without "pseudo-slippery" with the skin. Further, the present inventors have found that by including the composite gel, even when the powder component such as the component (D) and the color material is included, the oil-in-water type emulsified solid cosmetic composition can impart makeup retention properties while maintaining sufficient ductility, and thus can provide a cosmetic effect excellent in long-lasting makeup properties. Further, it is presumed that the reason why the stability of the cosmetic is also excellent with time is that the change in the emulsified state is suppressed due to the thickening effect of the α -gel formed from the above components.

Effects of the invention

According to the present invention, an oil-in-water emulsion solid cosmetic can be provided which is easy to use, easy to spread, sufficiently suppresses cosmetic unevenness, has excellent cosmetic effect and also has excellent long-term stability over time.

Detailed Description

The oil-in-water emulsion solid cosmetic of the present embodiment contains (A) an aliphatic alcohol having a melting point of 40 ℃ or higher (hereinafter, sometimes referred to as component (A)), (B) a surfactant (hereinafter, sometimes referred to as component (B)), (C) a water-soluble solidifying agent (hereinafter, sometimes referred to as component (C)), and (D) a polyacrylamide copolymer containing an acryloyldimethyl taurate as a structural unit (hereinafter, sometimes referred to as component (D)).

Component (A)

As the aliphatic alcohol having a melting point of 40 ℃ or higher, a monohydric alcohol having an aliphatic hydrocarbon group having 13 to 22 carbon atoms can be used. The aliphatic hydrocarbon group may be any of straight chain, branched chain, saturated, unsaturated. (A) The components may be used singly or in combination of two or more.

The melting point of the aliphatic alcohol in the present specification means a value measured by the following method.

The sample was weighed approximately 5mg and placed in an aluminum sample pan. An aluminum cover was attached to the pan and set in a differential scanning calorimeter "DSC7020" (product name, manufactured by Hitachi, ltd.). Using an electric cooling unit "Polyscience" (product name manufactured by hitachi high technology company), after maintaining the temperature of the sample and the standard sample at-10 ℃ for 1 minute at a nitrogen flow rate of 30 to 35ml/min, the temperature is raised from 0 ℃ to 120 ℃ at a temperature raising speed of 10 ℃ and lowered from 120 ℃ to-10 ℃ at a temperature lowering speed of-10 ℃ and again raised from-10 ℃ to 120 ℃ at a temperature raising speed of 10 ℃ after maintaining at-10 ℃ for 5 minutes, thereby obtaining a melting endothermic curve. The peak temperature of the melting endothermic curve in the second temperature rise at this time was taken as the melting point.

Specific examples of the component (A) include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and oleyl alcohol. From the viewpoints of improving gloss, adhesion, no dry feel, and long-lasting make-up, the component (a) may be an alcohol having a linear saturated hydrocarbon group having 14 to 22 carbon atoms, and examples of such an alcohol include myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol. Among them, from the viewpoint of improving gloss, adhesion, no dryness, and long-lasting make-up, one or more of cetyl alcohol, stearyl alcohol, and behenyl alcohol may be used, and from the viewpoint of stability over time, adhesion, and usability, stearyl alcohol and behenyl alcohol may be used in combination. In the case of using stearyl alcohol and behenyl alcohol in combination, the mixing ratio of stearyl alcohol to behenyl alcohol may be 9:1 to 1:9, may be 8:2 to 4:6, or may be 6:4 to 5:5 in terms of mass ratio. The mixture of stearyl alcohol and cetyl alcohol is referred to as cetostearyl alcohol, and the typical ratio of stearyl alcohol and cetyl alcohol in cetylstearyl alcohol is 50% to 70% by mass, and 20% to 30% by mass.

The content of the component (a) may be 1 to 20% by mass based on the total amount of the oil-in-water emulsified solid cosmetic composition from the viewpoint of ease of taking and uniformity of the coating film, may be 2% by mass or more or 3% by mass from the viewpoint of adhesion at the time of application and ease of taking, may be 15% by mass or less or 13% by mass from the viewpoint of no cosmetic unevenness and cosmetic durability, and may be 2 to 15% by mass or 3 to 13% by mass from the viewpoint of the above.

Component (B)

As the surfactant, surfactants commonly used in cosmetics can be used, and examples thereof include: an anionic surfactant a cationic surfactant cationic surface an active agent. They may be used singly or in combination of two or more.

In the oil-in-water emulsion solid cosmetic of the present embodiment, the component (B) contains (B-1) hydrogenated lecithin (hereinafter, sometimes referred to as the component (B-1)) and (B-2) a surfactant having an HLB of 8 or more (except for the component (B-1)), and is hereinafter, sometimes referred to as the component (B-2).

The HLB value can be obtained based on the calculation formula described in "emulsification and solubilization technique" engineering book (Sho 59-5-20) pages 8 to 12.

The HLB of the hydrogenated lecithin as the component (B-1) may be 8.0 to 12.0 or 9.0 to 11.0 from the viewpoints of the separation of the components and the percutaneous absorbability of the cosmetic and moisturizing components.

The content of the component (B-1) may be 0.5 to 3.0% by mass based on the total amount of the oil-in-water type emulsified solid cosmetic composition, from the viewpoint of easiness of taking, 1.0% by mass or more, from the viewpoint of adhesion at the time of application, 2.0% by mass or less, and from the viewpoint of 1.0 to 2.0% by mass.

The surfactant having an HLB of 8 or more as the component (B-2) may be a nonionic surfactant, and examples thereof include polyoxyethylene hydrogenated castor oil such as PEG-40 hydrogenated castor oil (HLB 12.5) and PEG-60 hydrogenated castor oil (HLB 14), polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate (20 E.O) (HLB 15) and polyoxyethylene sorbitan monostearate (20 E.O.) (HLB 14.9), polyoxyethylene sorbitol fatty acid esters such as polyoxyethylene sorbitol tetraoleate (HLB: 11.5), polyoxyethylene sorbitan fatty acid esters such as PEG-20 glycerol stearate (HLB 14), PEG-15 glycerol stearate (HLB 13.5), PEG-10 glycerol isostearate (HLB 10) and PEG-30 glycerol isostearate (HLB 15), polyethylene glycol fatty acid esters such as PEG-12 laurate (HLB 13.7), sorbitol fatty acid esters such as sorbitan monooleate (HLB 12), and polyglycerin fatty acid esters such as polyglycerin-10 stearate (12).

From the viewpoint of not being easily separated, the HLB of the component (B-2) may be 10.0 to 18.0 or 12.0 to 16.0.

The content of the component (B-2) may be 0.1 to 2.0% by mass, or 0.2% by mass or more and 0.3% by mass or more and 1.8% by mass or less and 1.5% by mass or less from the viewpoint of the difficulty in separation, and may be 0.2 to 1.8% by mass or 0.3 to 1.5% by mass from the viewpoint of the difficulty in separation.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, the total content of the component (B-1) and the component (B-2) may be 0.3 to 4.0% by mass, or 0.8% by mass or more or 1.0% by mass, or 3.3% by mass or less or 3.0% by mass, or 0.8 to 3.3% by mass, or 1.0% by mass, based on the total amount of the oil-in-water type emulsified solid cosmetic composition, in terms of the difficulty in separation, easy access, and the adhesion at the time of application, or from the viewpoint of the stability with time of the smell and color tone.

In the oil-in-water emulsion solid cosmetic of the present embodiment, the mass ratio (B-1)/(B-2) of the content of the component (B-1) to the content of the component (B-2) may be 1 to 10 from the viewpoint of not easy separation, may be 1.5 or more, 2 or more or 3 or more from the viewpoint of easy access, may be 8 or less, 7 or less or 6 or less from the viewpoint of the fitting property at the time of application, and may be 1.5 to 8, 2 to 7 or 3 to 6 from the viewpoint of the above.

In the oil-in-water emulsion solid cosmetic of the present embodiment, the mass ratio (a)/([ (B-1) + (B-2) ] of the content of the component (a) to the total content of the component (B-1) and the component (B-2) may be 1.2 to 9, or may be 1.2 to 8, or may be 1.5 or more than 2.0, from the viewpoint of the ease of application, the adhesion property at the time of application, or may be 8.0 or less, 6.0 or less, or 4.0 from the viewpoint of the ease of application and the lack of cosmetic unevenness, or may be 1.5 to 8.0, 2.0 to 6.0, or 2.3 to 4.0 from the viewpoint of the above. When (A)/([ (B-1) + (B-2) ] falls within the above range, an oil-in-water type emulsified solid cosmetic composition which is easily formed into a stable alpha gel, is easily handled, easily spread, and sufficiently suppressed in cosmetic unevenness, and is excellent in cosmetic durability and stability with time can be obtained.

(B) The component (B) may contain a surfactant other than the component (B-1) and the component (B-2), and the content thereof may be 2.0 mass% or less, 1.0 mass% or less, or 0.5 mass% or less based on the total amount of the oil-in-water emulsified solid cosmetic composition.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, the total content of the component (a), the component (B-1) and the component (B-2) may be 1.3 to 24% by mass, may be 4 to 18% by mass, or may be 5 to 10% by mass, based on the total amount of the oil-in-water type emulsified solid cosmetic composition, from the viewpoint of a stable emulsified state.

Component (C)

Examples of the water-soluble solidifying agent include agar, gellan gum, carrageenan, xanthan gum, and guar gum. (C) The components may be used singly or in combination of two or more.

The content of the component (C) may be 0.1 to 4.0% by mass or 0.2 to 3.5% by mass based on the total amount of the oil-in-water emulsified solid cosmetic composition, from the viewpoint of improving the stability of the cosmetic composition with time by a good dispersing action.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, agar may be contained in an amount of 0.6 to 3.0 mass% based on the total amount of the oil-in-water type emulsified solid cosmetic composition from the viewpoint of improving the stability of the cosmetic composition with time by a good dispersion effect and obtaining a feeling of use in combination with elasticity and softness. The content of agar may be 0.8 mass% or more or 1.0 mass% or more based on the total amount of the oil-in-water emulsified solid cosmetic from the viewpoints of the adhesion at the time of application, the cosmetic durability, and the ease of use, may be 2.5 mass% or less or 2.0 mass% or less from the viewpoints of no cosmetic unevenness and ease of use, and may be 0.8 to 2.5 mass% or 1.0 to 2.0 mass% from the viewpoints of the foregoing.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, from the viewpoint of improving the stability of the cosmetic composition with time and adjusting the feel of use by a good dispersion effect, the gellan gum may be contained in an amount of 0.2 to 1.0 mass% based on the total amount of the oil-in-water type emulsified solid cosmetic composition.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, from the viewpoint of improving the stability of the cosmetic composition with time and adjusting the feel of use by a good dispersion effect, the carrageenan may be contained in an amount of 1.5 to 3.5 mass% based on the total amount of the oil-in-water type emulsified solid cosmetic composition as the component (C).

Component (D)

Examples of the polyacrylamide copolymer containing acryloyldimethyltaurate as a structural unit (copolymerization component) include hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer, (sodium acrylate/sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate/vinylpyrrolidone) copolymer, and (ammonium acryloyldimethyltaurate/behenpolyether-25 methacrylate) crosslinked polymer.

(D) The components may be commercially available ones. For example, commercially available products of (hydroxyethyl acrylate/sodium acryloyldimethyl taurate) copolymer include SEPINOV EMT, SIMULGEL NS (manufactured by SEPPIC Co., ltd.) and the like. Further, as a commercial product of the (sodium acrylate/sodium acryloyldimethyl taurate) copolymer, SIMULGEL EG (manufactured by SEPPIC Co., ltd.) and the like are mentioned. Examples of the commercial product of the (ammonium acryloyldimethyl taurate/vinylpyrrolidone) copolymer include Aristoflex AVC (manufactured by Clariant Co., ltd.), and examples of the commercial product of the (ammonium acryloyldimethyl taurate/behenate polyether-25 methacrylate) crosslinked polymer include Aristoflex HMB (manufactured by Clariant Co., ltd.).

The content of the component (D) may be 0.1 to 2.0% by mass based on the total amount of the oil-in-water emulsified solid cosmetic from the viewpoint of improving the stability over time and the feel of the cosmetic with good dispersion, may be 0.2% by mass or more and 0.5% by mass or more from the viewpoint of the adhesion and the cosmetic durability at the time of application, may be 1.8% by mass or less and 1.5% by mass or less from the viewpoint of the spreadability, and may be 0.2 to 1.8% by mass or 0.5 to 1.5% by mass from the viewpoint of the aforementioned viewpoint.

The oil-in-water type emulsified solid cosmetic composition of the present embodiment may contain an oily component other than the component (a). Examples of the oily component include oils and fats, waxes, hydrocarbons, ester oils, higher alcohols other than the component (A), higher fatty acids, silicone oils, and oil-soluble ultraviolet absorbers. They may be used singly or in combination of two or more.

Examples of the oils and fats include solid oils and fats such as hydrogenated castor oil, hydrogenated jojoba oil, palm oil, and jatropha, and liquid oils and fats such as jojoba oil, sunflower seed oil, olive oil, castor oil, macadamia nut seed oil, camellia seed oil, rapeseed oil, linseed oil, and triglycerin.

Examples of waxes include beeswax, carnauba wax, candelilla wax, rice husk wax, sunflower seed wax, bran wax, spermaceti wax, and lanolin.

Examples of the hydrocarbon include polyethylene wax, microcrystalline wax, fischer-Tropsch wax, ceresin, vaseline, liquid paraffin, heavy liquid isoparaffin (heavy liquid isoparaffin), hydrogenated polydecene, squalane, and mineral oil.

Examples of the ester oil include glyceryl tribehenate, cholesterol fatty acid ester, diisostearyl malate, isopropyl myristate, cetyl ethylhexanoate, isopropyl palmitate, ethylhexyl palmitate, caprylic/capric triglyceride, neopentyl glycol dicaprate, glyceryl triisocaprylate, polyglyceryl triisostearate, dipentaerythritol tetrahydroxystearate/tetraisostearate, neopentyl glycol di-2-ethylhexanoate, and glyceryl tri (ethylhexanoate).

Examples of the higher fatty acid include stearic acid, oleic acid, myristic acid, palmitic acid, isostearic acid, behenic acid, linoleic acid, and linolenic acid.

The silicone oil may be: dimethyl polysiloxane, methyl phenyl polysiloxane, octamethyl cyclotetrasiloxane decamethyl cyclopentasiloxane, methyl polytrimethylsiloxane, and the like.

In the oil-in-water type emulsified solid cosmetic composition of the present embodiment, the content of the solid oil other than the component (a) may be 2% by mass or less, 1% by mass or less, or 0% by mass based on the total amount of the oil-in-water type emulsified solid cosmetic composition, from the viewpoint of ensuring that the hardness of the cosmetic composition is moderate and the cosmetic composition is easy to use.

The oil-in-water type emulsified solid cosmetic composition of the present embodiment may contain a powder component. The powder may be used without any particular limitation as long as it is a powder that is generally used in cosmetics. Examples thereof include extender powders and coloring pigments.

Examples of the constitution powder include inorganic powder, synthetic inorganic powder, organic powder, metal soap, synthetic polymer powder, and the like. More specifically, glass powder, anhydrous silicic acid, aluminum silicate, magnesium silicate, aluminum magnesium silicate, mica, synthetic phlogopite (synthetic mica), kaolin, sericite, synthetic sericite, talc, phlogopite, synthetic mica, silica, calcium carbonate, magnesium carbonate, alumina, boron nitride, silicon carbide, barium sulfate, zinc stearate, aluminum stearate, zinc myristate, polyethylene powder, polyurethane beads (urethane beads), polymethyl methacrylate, organopolysiloxane elastomer, and the like can be cited.

Examples of the coloring pigment include iron oxide red, iron oxide yellow, iron oxide black, cobalt oxide, chromium oxide, ultramarine, iron blue, titanium dioxide, zinc oxide, fine titanium dioxide, pearlescent pigment (mica titanium, iron oxide coated mica titanium, fine titanium dioxide coated mica titanium, barium sulfate coated mica titanium, fish scale foil, bismuth oxychloride, and flake aluminum powder). These powders may be those not subjected to surface treatment, or may be subjected to surface treatment for the purpose of improving usability, dispersibility, and the like. Examples of the surface treatment include metal soaps, silicon compounds (silicone compound), fluorides, surfactants, amino acid compounds, and the like.

The oil-in-water type emulsified solid cosmetic composition of the present embodiment may contain a pearlescent pigment. Even in such a case, the cosmetic unevenness can be sufficiently suppressed by the sufficient easy ductility.

The content of the powder component in the oil-in-water type emulsified solid cosmetic composition of the present embodiment may be 1.0 to 25.0% by mass, may be 3.0 to 20.0% by mass, or may be 5.0 to 15.0% by mass, based on the total amount of the oil-in-water type emulsified solid cosmetic composition.

The oil-in-water emulsion solid cosmetic of the present embodiment may contain water in an amount of 40 to 70% by mass, 45 to 65% by mass, or 50 to 60% by mass, based on the total amount of the oil-in-water emulsion solid cosmetic, from the viewpoints of both water-based, elastic and soft touch, easy access, easy spreading, adhesion, suppression of cosmetic unevenness, and cosmetic durability.

The oil-in-water type emulsified solid cosmetic composition of the present embodiment may contain components other than the above components. As other components, components which are generally used in cosmetics, for example, aqueous components such as moisturizers, ultraviolet absorbers, antifoaming agents, preservatives, vitamins, cosmetic components, antioxidants, fragrances, and the like may be appropriately blended as necessary within a range that does not impair the effects of the present invention.

Examples of the humectant include polyhydric alcohols such as 1, 3-Butanediol (BG), dipropylene glycol (DPG), glycerin, 1, 2-pentanediol, sorbitol, and mannitol. They may be used singly or in combination of two or more.

The oil-in-water type emulsified solid cosmetic composition of the present embodiment can be used as a makeup cosmetic composition such as blush, eye shadow, foundation, lipstick, eyebrow powder, and highlighter.

[ Method for producing oil-in-water type emulsified solid cosmetic Material ]

The method for producing an oil-in-water type emulsified solid cosmetic composition according to the present embodiment can be obtained by, for example, mixing and emulsifying water, the above-described component (a), component (B), component (C), component (D), and other components used as needed, and filling the mixture into a predetermined container and solidifying the mixture.

As the mixing step, for example, an oil phase obtained by mixing the component (a), the component (B-2), and other oily components with stirring may be emulsified by mixing the components in an aqueous phase obtained by mixing the component (B-1), the component (C), the component (D), and other aqueous components. The component (B-1), the component (B-2) and the other surfactant may be mixed in the oil phase, the aqueous phase, or the oil phase and the aqueous phase separately as described above. The powder component may be mixed in the oil phase, the water phase, or both the oil phase and the water phase.

The temperature at which the oil phase is prepared may be the temperature at which the component (A) and other solid oil are dissolved. The temperature at which the aqueous phase is prepared may also be room temperature.

Examples of the predetermined container include a bottle, a bowl (dome), a jar (jar), and a brush. Examples of the method of solidification include cooling by cooling with a cooler, and the like.

Examples (example)

The present invention will be described in further detail with reference to examples, but the technical scope of the present invention is not limited to these examples.

[ Preparation of oil-in-water type emulsified solid cosmetic Material ]

(Example 1 to 20 and comparative example 1 to 5)

The oil-in-water emulsion solid cosmetic (eye shadow) was adjusted according to the formulation shown in tables 1 to 5 (the numerical value of the blending amount represents the content (mass%) based on the total amount of the cosmetic) by the following method.

< Preparation method >

And mixing the components of the water phase group, heating to 80-90 ℃, and uniformly dispersing to form a water phase after confirming that the water-soluble curing agent is completely dissolved. On the other hand, the components of the oil phase group are mixed and heated to 80 to 90 ℃ to be dissolved and homogenized, and the mixture is used as an oil phase. The oil-in-water emulsified solid cosmetic is obtained by gradually adding an oil phase to the aqueous phase while stirring the aqueous phase at 75 to 85 ℃ to emulsify the aqueous phase, filling the aqueous phase into a tank container, and cooling the tank container.

The oil-in-water emulsified solid cosmetic compositions thus obtained were evaluated by the following evaluation methods. The results are shown in tables 1 to 5.

< Evaluation of cosmetic Material >

The cosmetic materials of examples and comparative examples were applied to the inner side of the arm with fingers by 5 panelists, and were evaluated from the viewpoints of easy access (proper amount of access), easy extension, application-time consistency, no cosmetic unevenness, and long-lasting make-up (coating film after 6 hours is less prone to powder floating). In each evaluation, 5-level evaluations were performed based on the following evaluation criteria, each sample was scored, and the average score of the scores of all panelists was determined based on the following determination criteria.

[ Evaluation criterion ]

5 Minutes, very good.

4 Minutes, good.

3 Minutes, common.

2 Minutes, slightly worse.

1 Min, difference.

[ Criterion (average score) ]

4 Or more.

And O is 3 or more and less than 4.

Delta is more than 2 and less than 3.

X is less than 2.

< Stability of cosmetic over time >

The cosmetic filled in the tank container was left to stand at 25 ℃ for 1 month. The "appearance color, application color, smell, and the above evaluation items" were confirmed for the cosmetics after standing, and the stability with time was evaluated based on the following determination criteria.

[ Criterion ]

No change.

Small change.

Delta is varied (within the tolerance).

X, significant change.

TABLE 1

TABLE 2

TABLE 3

TABLE 4

TABLE 5

In tables 1 to 5, details of the polyacrylamide copolymer as the component (D) are as follows.

D-1 "SEPINOV EMT 10" (trade name, product of SEPPIC Co., ltd., (hydroxyethyl acrylate/sodium acryloyldimethyl taurate) copolymer mixture).

D-2 "SIMULGEL EG" (trade name, (sodium acrylate/sodium acryloyldimethyl taurate) copolymer blend, manufactured by SEPPIC Co., ltd.).

D-3 "Aristoflex HMB" (trade name, (ammonium acryloyldimethyl taurate/behenate polyether-25 methacrylate) cross-linked polymer, manufactured by Clariant Co.).

In addition, the melting point of the higher alcohol and the HLB of the surfactant are as follows.

Cetostearyl alcohol, melting point 50 ℃.

Behenyl alcohol with a melting point of 66 ℃.

Stearyl alcohol, melting point 61 ℃.

Hydrogenated lecithin HLB10.0.

PEG-60 hydrogenated castor oil HLB14.

Polysorbate 80:hlb15.

PEG-11 methyl ether polydimethylsiloxane HLB14.5.

Example 21 eye shadow

< Preparation method >

Mixing the components 1-8, heating to 80-90 ℃, and uniformly dispersing to form a water phase after confirming that the water-soluble curing agent is completely dissolved. On the other hand, the components of the oil phase group are mixed and heated to 80 to 90 ℃ to be dissolved and homogenized, and the mixture is used as an oil phase. The oil-in-water emulsified solid cosmetic is obtained by gradually adding an oil phase to the aqueous phase while stirring the aqueous phase at 75 to 85 ℃ to emulsify the aqueous phase, filling the aqueous phase into a tank container, and cooling the tank container.

< Evaluation >

When the obtained eye shadow was evaluated in the same manner as described above, it was confirmed that the easy ductility was evaluated as "very good", the adhesion at the time of application was evaluated as "very good", the cosmetic unevenness-free was evaluated as "very good", the cosmetic durability was evaluated as "very good", the easy taking (proper taking) was evaluated as "very good", and the stability with time was evaluated as "very good".

Claims

1. An oil-in-water emulsified solid cosmetic composition comprising the following components,

A component A, namely an aliphatic alcohol with a melting point of more than 40 ℃;

the component B is a surfactant;

Component C, water-soluble curing agent and

Component D is polyacrylamide copolymer containing acryloyldimethyl taurate as structural unit,

The component B comprises the following components,

B-1 component, hydrogenated lecithin, and

A component B-2 which is a surfactant having an HLB of 8 or more, wherein the component B-1 is not used,

The mass ratio (A)/([ (B-1) + (B-2) ] of the content of the component A to the total content of the component B-1 and the component B-2 is 1.2 to 9.

2. The oil-in-water type emulsified solid cosmetic composition according to claim 1, wherein,

The mass ratio (B-1)/(B-2) of the content of the component B-1 to the content of the component B-2 is 1 to 10.

3. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The component C comprises agar-agar, and the component C comprises agar-agar,

The agar content is 0.6-3.0 mass% based on the total amount of the oil-in-water emulsified solid cosmetic material.

4. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The content of the solid oil other than the component A is 2% by mass or less based on the total amount of the oil-in-water emulsified solid cosmetic.

5. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The total content of the component A, the component B-1 and the component B-2 is 1.3 to 24% by mass based on the total amount of the oil-in-water emulsified solid cosmetic.

6. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The mass ratio (A)/([ (B-1) + (B-2) ] of the content of the component A to the total content of the component B-1 and the component B-2 is 2.0 to 6.0.

7. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The component A comprises at least one of laurinol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol and oleyl alcohol.

8. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The component B-2 comprises at least one selected from polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, sorbitan fatty acid ester and polyglycerin fatty acid ester.

9. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The component D comprises at least one selected from (hydroxyethyl acrylate/sodium acryloyldimethyl taurate) copolymer, (sodium acrylate/sodium acryloyldimethyl taurate) copolymer, (ammonium acryloyldimethyl taurate/vinyl pyrrolidone) copolymer and (ammonium acryloyldimethyl taurate/behenpolyether-25 methacrylate) cross-linked polymer.

10. The oil-in-water emulsified solid cosmetic composition according to claim 1 or 2, wherein,

The content of the component D is 0.1 to 2.0% by mass based on the total amount of the oil-in-water emulsified solid cosmetic.