Oil-in-water cosmetics

Abstract

To provide oil-in-water cosmetics that contain oil-based particles having a good feeling of use.SOLUTION: Oil-in-water cosmetics contain (A) oil-based particles with an average particle size of 50 μm-10 mm, containing (A1) solid oil and (A2) liquid oil, (B) a cyclic carboxamide derivative having a specific structure or a salt thereof and (C) water.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-in-water type cosmetic. More specifically, it relates to an oil-in-water type cosmetic containing oily particles of a visible size.

Background Art

[0002] An oil-in-water type emulsified cosmetic in which large oily particles having an average particle diameter of 50 μm to 10 mm are dispersed in an aqueous phase is known. Such a cosmetic containing such large oily particles is not only visually novel and beautiful because of the dispersion of oily particles of a visible size, but also has a fresh and refreshing feeling when applied to the skin, and a moist feeling after some time, providing a hitherto unprecedented feeling of use. Further, if a decomposable oil-soluble component is held in the large oily particles, there is also an effect of suppressing the decomposition of the oil-soluble component. For example, Patent Document 1 discloses a capsule-containing cosmetic in which oily particles having an average particle diameter of 100 μm or more and containing an oily component that is solid at normal temperature are dispersed in an aqueous medium.

[0003] On the other hand, cyclic carboxamide derivatives are known to have an anti-wrinkle effect and a pigmentation suppression effect, and it has been proposed to be incorporated into cosmetics and the like (Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

[0005] According to the studies of the present inventors, it has been found that when a cyclic carboxamide derivative is incorporated into a cosmetic, a decrease in the feeling of use occurs. In this context, the inventors of this invention have surprisingly discovered that combining cyclic carboxamide derivatives with large oily particles can suppress the deterioration of usability. This invention is based on these findings.

[0006] The present invention provides the following: [1] (A) Oily particles having an average particle diameter of 50 μm to 10 mm, comprising (A1) solid oil and (A2) liquid oil. (B) A cyclic carboxamide derivative represented by formula (1) or a salt thereof. [ka] (In the formula, R 1 This is a hydrocarbon group having 1 to 6 carbon atoms, which may be substituted with a hydroxyl group, or a hydrogen atom. X is -CH2- or -N(R 2 )- and here, R 2 is a hydrocarbon group having 1 to 6 carbon atoms, which may be substituted with a hydroxyl group, or a hydrogen atom, and n is an integer between 1 and 3), and (C)Water An oil-in-water cosmetic comprising [the specified ingredient]. [2] In formula (1) of component (B), R 1 However, it is a hydroxyalkyl group having 1 to 3 carbon atoms. X is -CH2- or -NH-, and The cosmetic product described in [1], wherein n is 1. [3] The cosmetic composition according to [1] or [2], wherein component (B) is 1-(2-hydroxyethyl)-2-imidazolidinone. [4](B) The amount of ingredient is 0.01 to 5% by mass of the total amount of the cosmetic, as described in any of [1] to [3]. [5] A cosmetic composition according to any one of [1] to [4], wherein component (A1) is selected from solid oils having a melting point of 50°C or higher. [6] A cosmetic composition according to any one of [1] to [5], wherein the amount of component (A1) is 5 to 50% by mass of the total amount of component (A1) and component (A2). [7] A cosmetic composition according to any one of [1] to [6], wherein the amount of component (A2) is 50 to 95% by mass of the total amount of component (A1) and component (A2). [8](D) A cosmetic composition according to any one of [1] to [7], further comprising a water-soluble thickener.

[0007] According to the present invention, it is possible to provide a cosmetic product with excellent usability. In particular, it blends well, provides a good fit during application, and suppresses stickiness after application. Specific description of the invention

[0008] [Oil-in-water cosmetic] The present invention relates to an oil-in-water cosmetic composition (hereinafter sometimes referred to as "cosmetic composition") comprising (A) oily particles having an average particle diameter of 50 μm to 10 mm, comprising (A1) a solid oil component and (A2) a liquid oil component, (B) a cyclic carboxamide derivative having a specific structure or a salt thereof, and (C) water.

[0009] (A) Oily particles The cosmetic composition according to the present invention comprises oily particles having an average particle diameter of 50 μm to 10 mm, and comprising (A1) solid oil (hereinafter sometimes referred to as (A1) component; the same applies to the following components) and (A2) liquid oil. The oily particles are dispersed in the aqueous phase, and it is believed that the oily particles have a capsule structure in which the inner layer containing component (A2) is surrounded by a coating of component (A1) (outer layer). Furthermore, the crystallization of the solid oil forming the outer layer gives it a moderate hardness, resulting in a unique feel when used. The average particle size of the oily particles is 50 μm to 10 mm, preferably 100 μm to 1.5 mm, and more preferably 100 μm to 1 mm. The particle size of the oily particles can be measured using a microscope. The amount of oily particles blended is preferably 0.1 to 15% by mass, and more preferably 0.3 to 10% by mass, relative to the total amount of cosmetic material. Oily particles can be formed, for example, by introducing (A1) solid oil and (A2) liquid oil, which have been adjusted to a temperature above their melting point and made liquid, into an aqueous solvent adjusted to a temperature above its melting point under stirring at 10 to 1500 rpm to form a mixture, and then cooling the mixture to room temperature under the same stirring.

[0010] (A1) Solid oil (A) The oily particles consist of (A1) solid oil. In the present invention, "solid oil" means oil that is solid or semi-solid at room temperature (25°C). (A1) Examples of solid oils include solid paraffin, microcrystalline wax, ceresin, beeswax, barico wax, polyethylene wax, silicone wax, higher alcohols (e.g., behenyl alcohol, stearyl alcohol, cetyl alcohol, etc.), batyl alcohol, carnauba wax, beeswax, candelilla wax, jojoba wax, lanolin, shellac wax, whale wax, Japanese wax, higher fatty acids (e.g., myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, etc.), ester oils (e.g., myristyl myristate, dextrin palmitate, etc.), cocoa butter, hydrogenated castor oil, hydrogenated oil, hydrogenated palm oil, palm oil, hydrogenated coconut oil, polyethylene, petrolatum, various hydrogenated animal and vegetable oils and fats, fatty acid monocarboxylic acid lanolin alcohol esters, etc. (A1) The melting point of the solid oil component is preferably 50 °C or higher, more preferably 55 °C or higher, and even more preferably 65 °C or higher from the viewpoint of stability at high temperatures. Also, from the viewpoints of particle formation and dispersibility, the melting point is preferably 85 °C or lower. More preferable (A) solid oil components include hydrogenated jojoba oil (melting point: 68 °C), glyceryl behenate eicosanedioate (melting point: 66 °C), higher alcohols having 16 or more carbon atoms, preferably 18 or more carbon atoms such as stearyl alcohol (melting point: 52 - 62 °C) and behenyl alcohol (melting point: 68 °C), microcrystalline wax (melting point: 80 °C), ceresin (melting point: 68 - 75 °C), polyethylene wax (melting point: 80 °C), batyl alcohol (melting point: 70 °C), carnauba wax (melting point: 83 °C), candelilla wax (melting point: 71 °C), hydrogenated castor oil (melting point: 84 °C), stearic acid (melting point: 58 - 63 °C), behenic acid (melting point: 69 - 80 °C), 12-hydroxystearic acid (melting point: 70 °C), etc.

[0011] (A1) component can be blended in one kind or two or more kinds. The blending amount of the (A1) component in the composition of the present invention is preferably 5 - 50% by mass, more preferably 10 - 40% by mass, based on the total blending amount of the (A1) component and the (A2) component. By setting it within this range, the stability of the oily particles can be improved, and the oily particles can have appropriate firmness and good usability such as skin compatibility.

[0012] (A2) Liquid oil component (A) The oily particles contain (A2) liquid oil component. In the present invention, "liquid oil component" means an oil component that is liquid at normal temperature (25 °C). (A2) Examples of the liquid oil component include, Linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, apricot kernel oil, cinnamon oil, jojoba oil, grape oil, almond oil, rapeseed oil, sesame oil, sunflower oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, triglycerin, glyceryl trioctanoate, glyceryl triisopalmitate, octanoic acid esters such as cetyl octanoate, glyceryl tri-2-ethylhexanoate, pentaerythrityl tetraethylhexanoate, and other isooctanoic acid esters, lauric acid Lauric acid esters such as xyl, myristic acid esters such as isopropyl myristate and octyldodecyl myristate, palmitic acid esters such as octyl palmitate, stearic acid esters such as isocetyl stearate, isostearate esters such as isopropyl isostearate and glyceryl diisostearate, isopalmitic acid esters such as octyl isopalmitate, oleic acid esters such as isodecyl oleate, adipate diesters such as diisopropyl adipate, sebacate diesters such as diethyl sebacate, ester oils such as diisostearyl malate, Liquid paraffin, ozokerite, squalane, squalene, pristane, paraffin, isoparaffin, petrolatum, hydrogenated polydecene and other hydrocarbon oils, Examples include chain-like silicones such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (phenylmethicone), and methylhydrogenpolysiloxane; cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; and silicone oils containing modified silicones such as amino-modified silicone oil, polyether-modified silicone oil, carboxy-modified silicone oil, alkyl-modified silicone oil, ammonium salt-modified silicone oil, and fluorine-modified silicone oil. Among these, polar oil components such as glycerin tri-2-ethylhexenoate and pentaerythrityl tetraethylhexanoate are preferable because they can impart a moist feeling along with a good skin affinity due to the presence of oily particles. Also, silicone oil is preferable because it can impart a moist feeling and a smooth feeling along with a good skin affinity due to the presence of oily particles.

[0013] (A2) component can be blended with one or more than one kind. The blending amount of the (A2) component in the composition of the present invention is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, with respect to the total blending amount of the (A1) component and the (A2) component. By setting it within this range, the stability of the oily particles can be improved, and the oily particles can have an appropriate firmness, and usability such as skin affinity can be improved.

[0014] (A) The oily particles can contain other components in addition to the essential components of (A1) and (A2) as long as the effects of the present invention are not inhibited. Examples of other components that can be blended into the oily particles include oil-soluble thickeners, moisturizing agents, oil-soluble drugs (for example, oil-soluble vitamins, oil-soluble plant extracts, etc.), ultraviolet absorbers, chelating agents, pH adjusters, preservatives, pigments, dyes, surfactants, powder components, and the like.

[0015] (B) Cyclic carboxamide derivative or its salt The cosmetic according to the present invention comprises a cyclic carboxamide derivative represented by formula (1) or a salt thereof.

Chemical formula

[0016] In a preferred form, in formula (1) of component (B), R 1 However, it is a hydroxyalkyl group having 1 to 3 carbon atoms. X is -CH2- or -NH-, and n is 1. Specific examples of cyclic carboxamide derivatives represented by formula (1) include the following: [ka] Component (B) is most preferably 1-(2-hydroxyethyl)-2-imidazolidinone.

[0017] Component (B) may be a salt of a cyclic carboxamide derivative represented by formula (1). The type of salt is not particularly limited as long as it is a pharmacologically acceptable salt, and may be an inorganic or organic salt. Examples of inorganic salts include hydrochloride, sulfate, phosphate, hydrobromide, sodium salt, potassium salt, magnesium salt, calcium salt, magnesium salt, ammonium salt, etc. Examples of organic salts include acetate, lactate, maleate, fumarate, tartrate, methanesulfonate, p-toluenesulfonate, triethanolamine salt, amino acid salt, etc.

[0018] (B) One or more components may be included. The amount of (B) component is preferably 0.01 to 5% by mass, and more preferably 0.5 to 3% by mass, relative to the total amount of the cosmetic. By combining (A) oily particles within this amount range, the ease of application, the fit after application, and the stickiness after application, derived from (B) component can be further improved.

[0019] (C)Water The cosmetic composition according to the present invention comprises (C) water. As the water, water used for cosmetics, quasi-drugs, etc., can be used, for example, purified water, ion-exchanged water, tap water, etc. The amount of water added is preferably 50 to 85% by mass, and more preferably 60 to 80% by mass, relative to the total amount of the cosmetic composition according to the present invention.

[0020] (D) Water-soluble thickener The cosmetic composition according to the present invention may further contain (D) a water-soluble thickener. Including component (D) can further improve the stability of the dispersion. (D) Components include, for example, plant-derived polymers such as gum arabic, tragacanth gum, galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), and algae colloid (brown algae extract); microbial polymers such as dextran, succinoglucan, pullulan, and xanthan gum; animal-derived polymers such as collagen, casein, albumin, and gelatin; methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, and crystalline cellulose. Examples include cellulose-based polymers such as lurose and cellulose powder; alginate-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer (carbomer); polyoxyethylene-based polymers such as hydrophobic modified polyether urethane; acrylic-based polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylamide; polyethyleneimine, cationic polymers, bentonite, magnesium aluminum silicate, laponite, hectorite, and anhydrous silicic acid.

[0021] Of these, acrylic polymers are preferred because they possess surfactant properties and also have the effect of preventing aggregation and coalescence of large particles. They are also called alkyl acrylate methacrylate copolymers (alkyl-modified carboxyvinyl polymers), and are preferably (acrylates / alkyl acrylate (C10-30)) crosspolymers. Commercial (acrylates / alkyl acrylate (C10-C30)) crosspolymers may be used, and examples include "CARBOPOL 1342," "Pemulen TR-1 Polymeric Emulsifier," and "Pemulen TR-2 Polymeric Emulsifier" (manufactured by Lubrizol Advanced Materials, Inc.). As acrylic polymers, for example, (sodium acrylate / sodium acryloyldimethyl taurate) copolymer, (dimethylacrylamide / sodium acryloyldimethyl taurate) crosspolymer, etc., can also be used.

[0022] (D) One or more components may be included. The amount of component (D) is preferably 0.001 to 5% by mass, and more preferably 0.1 to 2.5% by mass, relative to the total amount of the cosmetic.

[0023] The cosmetic composition according to the present invention may contain other ingredients commonly used in cosmetics, as long as they do not interfere with the effects of the present invention. Examples of such ingredients include oil-soluble thickeners, humectants, water-soluble agents (e.g., arbutin, ascorbic acid glucoside, tranexamic acid, 4-methoxysalicylate, etc.), UV absorbers, chelating agents, pH adjusters, preservatives, pigments, dyes, surfactants, powder components, etc. In addition, oils may be added separately from components (A1) and (A2). The cosmetic composition according to the present invention is generally prepared by combining component (A) with other raw materials, but other ingredients may include oils other than components (A1) and (A2).

[0024] The cosmetic composition according to the present invention is suitable for use as a cosmetic base having a unique appearance and feel. Examples of cosmetic compositions using this base include aqueous cosmetics, gel-like cosmetics, and emulsified cosmetics. Specifically, it can be used as a facial, body, or hair cosmetic such as lotions, gels, emulsions, creams, and masks. [Examples]

[0025] The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the amounts are expressed as mass % of the total amount.

[0026] [Examples 1-6 and Comparative Examples 1-6] Cosmetics for Examples 1-6 and Comparative Examples 1-6 were prepared using the formulations shown in Table 1. Oily particles were formed by heating an aqueous solvent to 70°C and stirring it at 250 rpm using a propeller mixer, while melting components (A1) and (A2) at 70°C using a liquid transfer pump at a rate of 20 m / min into the aqueous solvent phase from the bottom of the phase. After the injection was complete, the stirring speed was reduced to 150 rpm, and after cooling to room temperature, potassium hydroxide was added to form the particles. Note that Comparative Examples 1-6 do not contain (A) oily particles. [Table 1]

[0027] Ten expert panelists applied the cosmetics prepared above to their skin and evaluated their "ease of application," "non-stickiness" after application, and "fit" during application. Based on the evaluations of each expert panelist, judgments were made according to the following criteria. The results are shown in Table 1. "Familiarity" A: More than 9 out of 10 panel members responded that they found it familiar. B: Between 6 and 8 out of 10 panel members responded that they found it familiar. C: Between 3 and 5 out of 10 panel members responded that they found it familiar. D: Two or fewer out of 10 panel members responded that they found it familiar. [Non-sticky] A: More than 9 out of 10 panel members responded that there was no stickiness. B: Between 6 and 8 out of 10 panel members responded that there was no stickiness. C: Between 3 and 5 out of 10 panel members responded that there was no stickiness. D: Two or fewer out of 10 panelists responded that there was no stickiness. [Fit] A: More than 9 out of 10 panelists responded that the fit was good. B: Between 6 and 8 out of 10 panelists responded that the fit was good. C: Between 3 and 5 out of 10 panelists responded that the fit was good. D: Two or fewer out of 10 panelists reported a good fit.

[0028] [Particle size of oily particles] Three g of the cosmetic compositions prepared in Examples 1-6 above were spread in a 55 mm diameter petri dish. Images were captured from above using a digital camera along with a scale. The particle sizes of 50 representative particles were read from the scale, and the particle size range and average value were calculated.

Claims

1. (A) Oily particles having an average particle diameter of 50 μm to 10 mm, comprising (A1) solid oil and (A2) liquid oil. (B) A cyclic carboxamide derivative represented by formula (1) or a salt thereof 【Chemistry 1】 (In the formula, R １ This is a hydrocarbon group having 1 to 6 carbon atoms, which may be substituted with a hydroxyl group, or a hydrogen atom. X is -CH ２ - or -N(R ２ ) - and here, R ２ is a hydrocarbon group having 1 to 6 carbon atoms, which may be substituted with a hydroxyl group, or a hydrogen atom, and n is an integer from 1 to 3), and (C) Water It includes, (B) Component is 1-(2-hydroxyethyl)-2-imidazolidinone, (D) Further containing a water-soluble thickener, and not containing polyvinyl alcohol, Component (D) contains (acrylates / alkyl acrylate (C10-30)) crosspolymer, (A) The amount of ingredient blended is 0.3 to 10% by mass relative to the total amount of cosmetic product. (B) The amount of ingredient blended is 0.01 to 5% by mass relative to the total amount of the cosmetic product. (D) An oil-in-water cosmetic in which the amount of component is 0.1% to 5% by mass of the total amount of the cosmetic.

2. (A1) The cosmetic composition according to claim 1, wherein component (A1) is selected from solid oils having a melting point of 50°C or higher.

3. The cosmetic composition according to claim 1 or 2, wherein the amount of component (A1) is 5 to 50% by mass of the total amount of component (A1) and component (A2).

4. The cosmetic composition according to any one of claims 1 to 3, wherein the amount of component (A2) is 50 to 95% by mass of the total amount of component (A1) and component (A2).

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