Aqueous cosmetics

Abstract

To provide liquid cosmetics, particularly aqueous cosmetics, that have pastel coloring, excellent water resistance and abrasion resistance, and also excellent storage stability.SOLUTION: Provided is an aqueous cosmetic containing (A) crystalline cellulose, (B) a white pigment, (C) a colored pigment, (D) a film-forming polymer emulsion, and (E) a water-soluble dispersant, the aqueous cosmetic preparation having a viscosity of 100 mPa s or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to aqueous cosmetic preparations, and more specifically to aqueous cosmetic preparations that have pastel color development and excellent water resistance and abrasion resistance, making them suitable for makeup applications. The term "pastel color" used here refers not to clear hues like primary colors (red, blue, yellow, green, etc.), but to pale colors that are mixed with white, such as cherry blossom pink and mauve. [Background technology]

[0002] Cosmetics suitable for makeup such as eyeliner, eyebrow pencil, eye color, etc. are known to come in various types, including oil-based and water-based. Of these, water-based cosmetics are excellent in that the cosmetic film they form is less likely to bleed and is easier to remove, and their development has been actively pursued in recent years.

[0003] In recent years, the uses of makeup cosmetics have become more diverse, and in response to demands for greater fashionability, there has been an increasing trend toward cosmetics containing highly radiant pearl pigments and glitter agents. Pastel colors are also becoming more popular. However, since the white pigment and colored pigment separate over time, it is difficult to ensure sufficient stability, and furthermore, the color gamut is limited in order to ensure stability, so it has not necessarily been attractive to consumers.

[0004] Patent Document 1 discloses an aqueous liquid cosmetic containing an acrylic acid-based aqueous emulsion, crystalline cellulose, and an inorganic pigment. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-063299 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was completed against this background, and its object is to provide a liquid cosmetic, particularly an aqueous cosmetic, that exhibits excellent pastel color development, water resistance, and abrasion resistance, as well as excellent storage stability. [Means for solving the problem]

[0007] In order to solve the above problems, the first invention provides an aqueous cosmetic preparation comprising (A) crystalline cellulose, (B) a white pigment, (C) a colored pigment, (D) a film-forming polymer emulsion, and (E) a water-soluble dispersant, the aqueous cosmetic preparation having a viscosity of 100 mPa s or less.

[0008] A second aspect of the present invention provides the aqueous cosmetic preparation, characterized in that the blending amount of (A) crystalline cellulose is from 0.01 to less than 0.7% by mass.

[0009] The third invention provides the aqueous cosmetic preparation, wherein the blending ratio of component (B) to component (C), component (C) / (component (B)+component (C)), is 0.05 or more and 0.35 or less.

[0010] A fourth aspect of the present invention provides the aqueous cosmetic preparation, wherein the blending amount of the film-forming polymer emulsion (D) is 1 to 45% by mass.

[0011] A fifth aspect of the present invention provides the aqueous cosmetic preparation, wherein the blending amount of the water-soluble dispersant (E) is 0.01 to 10% by mass. [Effects of the Invention]

[0012] According to the present invention, by the above-mentioned means, it is possible to provide an aqueous cosmetic preparation that maintains pastel color development without causing color separation between the white pigment and the colored pigment, enables the expression of novel designs, and has sufficient water resistance and abrasion resistance as well as excellent storage stability.

[0013] Furthermore, even when used in an automatic pen type, the white pigment and the colored pigment can be ejected without color separation, making it possible to easily provide a desirable pen-type cosmetic. DETAILED DESCRIPTION OF THE INVENTION

[0014] The aqueous cosmetic preparation of a preferred embodiment of the present invention contains (A) crystalline cellulose (hereinafter, sometimes referred to as component (A)), (B) a white pigment (hereinafter, sometimes referred to as component (B)), (C) a colored pigment (hereinafter, sometimes referred to as component (C)), (D) a film-forming polymer emulsion (hereinafter, sometimes referred to as component (D)), and (E) a water-soluble dispersant (hereinafter, sometimes referred to as component (E)).

[0015] In this specification, the term "aqueous" means that at least water is contained. In addition to water, the aqueous cosmetic preparation may further contain a lower alcohol having 1 to 5 carbon atoms, such as ethanol.

[0016] The water content in the aqueous cosmetic preparation of this embodiment is preferably 25 to 85 mass %, more preferably 25 to 70 mass %, and most preferably 25 to 60 mass %, based on the total mass of the cosmetic preparation.

[0017] Furthermore, in the aqueous cosmetic preparation of this embodiment, the term "liquid" means that the preparation exhibits fluidity at 25°C.

[0018] The viscosity of the aqueous cosmetic preparation of this embodiment at 25°C may be 100 mPa·s or less, and more preferably 70 mPa·s or less. A viscosity exceeding 100 mPa·s is undesirable because it makes the preparation unable to be redispersed and affects application properties. The viscosity can be set appropriately depending on the shape of the container.

[0019] [(A) Crystalline cellulose] The crystalline cellulose, which is component (A) used in the present invention, can be used without any particular limitation, and is in powder form. It not only functions as a thickener, but also as an anti-settling agent that prevents the powder from settling and as a cushioning material that penetrates between the powder particles. It is different from cellulose nanofiber, which is generally used as a thickener.

[0020] The blending amount of component (A) is preferably 0.01 to less than 0.7% by mass, and even more preferably 0.1 to less than 0.7% by mass. If it is less than 0.01% by mass, the redispersibility and cushioning properties will not be exhibited. If it is 0.7% by mass or more, the viscosity will be too high and redispersibility will not be possible, which is undesirable.

[0021] [(B) White pigment] The white pigment used as component (B) in the present invention can be any white pigment, and examples of the white pigment include titanium dioxide and zinc oxide.

[0022] In the aqueous cosmetic composition of the present invention, the above white pigments can be used alone or in combination of two or more.

[0023] Furthermore, the content of the white pigment in the aqueous cosmetic is preferably 10 to 30 wt %, and more preferably 10 to 20 wt %, relative to the total weight of the aqueous cosmetic. If it is less than 10 wt %, it becomes difficult to achieve pastel tones, and if it exceeds 30 wt %, it becomes difficult to apply and redispersibility also decreases.

[0024] [(C) Colored pigment] The colored pigment used as component (C) in the present invention can be any colored pigment, and may be an inorganic or organic pigment.

[0025] The inorganic pigment is not particularly limited and may be any commonly used pigment, more specifically, for example, red iron oxide, yellow iron oxide, black iron oxide, carbon black, ultramarine, ferric iron oxide, chromium oxide, chromium hydroxide, manganese violet, etc.

[0026] The organic pigment is not particularly limited and may be any pigment that can be normally used in cosmetics. More specifically, examples include organic pigments such as Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404; and organic pigments such as zirconium, barium, or aluminum lakes, such as Red No. 3, Red No. 104(1), Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, and Blue No. 1.

[0027] The aqueous cosmetic composition of the present invention may contain one or more of these inorganic pigments and / or organic pigments.

[0028] To achieve pastel color development, the blend ratio of component (B) to component (C) is important. In the present invention, the blend ratio of component (B) to component (C), component (C) / (component (B) + component (C)), is preferably 0.05 or more and 0.35 or less, and it has been found that good pastel color development is achieved when the blend ratio is 0.1 or more and 0.3 or less. If this blend ratio is less than 0.05, the resulting color is too white and cannot be considered pastel, while if it exceeds 0.35, the color intensity is too strong and the color no longer becomes pastel.

[0029] [(D) Film-forming polymer emulsion] The film-forming polymer emulsion, component (D) used in the present invention, is an essential component in order to provide cosmetic effects such as adding volume to eye makeup cosmetics and to improve cosmetic durability. The film-forming polymer emulsion referred to in the present invention is a dispersion of a water-insoluble polymer compound in an aqueous solvent, and is not particularly limited as long as it is one normally used in cosmetics, and any of these can be used.

[0030] Specific examples include alkyl acrylate copolymer emulsions, alkyl acrylate-styrene copolymer emulsions, alkyl acrylate-vinyl acetate copolymer emulsions, alkyl acrylate-diacetone acrylamide copolymer emulsions, and urethane-acrylic composite resin emulsions. These can be used alone or in combination as needed.

[0031] Among these, alkyl acrylate copolymer emulsions are preferred from the viewpoint of the water resistance and abrasion resistance of the cosmetic film. Note that the alkyl acrylate referred to here also includes alkyl methacrylate.

[0032] The film-forming polymer emulsion to be used may be one that uses water as a medium and has a solids concentration of 30 to 60% by mass.

[0033] Commercially available film-forming polymer emulsions can be used. Examples of alkyl acrylate copolymer emulsions include Yodozole GH800F (Akzo Nobel, solids concentration 45% by mass), Yodozole GH810F (Akzo Nobel, solids concentration 46% by mass), Yodozole GH34F (Akzo Nobel, solids concentration 42% by mass), and Daitosol 5000SJ (Daito Chemical Industry Co., Ltd., solids concentration 50% by mass). Examples of alkyl acrylate-styrene copolymer emulsions include Yodozole GH41F (Akzo Nobel, solids concentration 45% by mass), Daitosol 5000STY (Daito Chemical Industry Co., Ltd., solids concentration 50% by mass), and Emmapoly CE-119N (Nikko Chemicals Co., Ltd., solids concentration 50% by mass). Examples of alkyl acrylate-vinyl acetate copolymer emulsions include Vinisol 2140L (manufactured by Daido Chemical Industry Co., Ltd., solids concentration 45% by mass). Examples of alkyl acrylate-diacetone acrylamide copolymer emulsions include Plussize L-9540U (manufactured by Goo Chemical Industry Co., Ltd., solids concentration 40% by mass). Examples of urethane acrylic composite resin emulsions include Rikabond SS-3000 (manufactured by Japan Coating Resin Co., Ltd., solids concentration 30% by mass). Film-forming polymer emulsions can be used alone or in combination of two or more types.

[0034] The blending amount of the film-forming polymer emulsion is preferably 1 to 45% by mass, more preferably 5 to 40% by mass. If it is less than 1% by mass, stability is poor, and if it exceeds 45% by mass, the coating properties are adversely affected, which is undesirable.

[0035] [(E) Water-soluble dispersant] The water-soluble dispersant, which is component (E) used in the present invention, can be used without any particular limitation.

[0036] Examples of the water-soluble dispersant used in this embodiment include water-soluble polymers such as polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and acrylic polymers; and surfactants such as nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0037] Examples of acrylic polymers include homopolymers or copolymers of one or more monomers selected from the group consisting of (meth)acrylic acid and (meth)acrylic acid alkyl esters. The (meth)acrylic acid alkyl ester is preferably an alkyl ester having 1 to 4 or 8 carbon atoms. The above-mentioned homopolymers and copolymers preferably contain a structure having an acidic residue in the side chain as a monomer unit structure constituting the main chain, and are water-soluble polymers that can be dissolved in water by neutralization. The acrylic polymer may be a neutralized product of ammonium salt or the like.

[0038] The acrylic polymer may be blended as a mixed solution with water, ethanol, a polyhydric alcohol, or a mixture thereof.

[0039] Commercially available acrylic polymers can be used, and alkyl acrylate copolymers are preferred. Commercially available products such as Luvimer 100P (manufactured by BASF, solid content 100% by mass), COVACRYL A15 (manufactured by SENSIENT, solid content 30% by mass), and JURYMER AT-210 and AT-510 (manufactured by Toagosei, solid content 30% by mass) may be used. Note that the alkyl acrylate copolymer referred to here refers to the copolymers in alkyl acrylate copolymer, alkyl acrylate copolymer liquid (1) and alkyl acrylate copolymer liquid (2) specified in the Quasi-drug Raw Materials Standards (QSD).

[0040] Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, glycerin alkyl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, and alkylene glycol adducts thereof, polyalkylene glycol fatty acid esters, polyglycerin-modified silicones, and polyether-modified silicones.

[0041] Examples of anionic surfactants include alkyl phosphates, polyoxyalkylene alkyl ether phosphates, sulfonates, alkyl sulfates, and polyaspartates.

[0042] Examples of cationic surfactants include alkylamine salts and alkyltrimethylammonium salts.

[0043] Examples of amphoteric surfactants include lecithin, carbobetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, and amino acid-type amphoteric surfactants.

[0044] The water-soluble dispersants can be used alone or in combination of two or more.

[0045] Particularly preferred water-soluble dispersants include alkyl acrylate copolymers, polyoxyethylene behenyl ether, PEG-60 hydrogenated castor oil, and PEG-40 stearate.

[0046] The content of the water-soluble dispersant in the aqueous liquid cosmetic of this embodiment is preferably 0.01 to 10 mass % and more preferably 0.1 to 8 mass % based on the total amount of the cosmetic. When the content of the water-soluble dispersant is within the above range, the dispersibility of the inorganic color pigment is easily improved.

[0047] The water-soluble thickener other than component (A) is not particularly limited as long as it is one that is used in cosmetics, and examples thereof include natural water-soluble thickeners, semi-synthetic water-soluble thickeners, synthetic water-soluble thickeners, and inorganic water-soluble thickeners.

[0048] Specific examples of natural water-soluble thickeners include plant-based polymers such as gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), algae colloid (cassow extract), starch (rice, corn, potato, wheat), and glycyrrhizic acid; microbial polymers such as xanthan gum, dextran, succinoglucan, and pullulan; and animal-based polymers such as collagen, casein, albumin, and gelatin.

[0049] Specific examples of semi-synthetic water-soluble thickeners include starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch; cellulose-based polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose (CMC), and cellulose powder; and alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

[0050] Specific synthetic water-soluble thickeners include, for example, vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer (carbomer); polyoxyethylene polymers such as polyethylene glycol (weight average molecular weight: 1,500, 4,000, and 6,000); polyoxyethylene-polyoxypropylene copolymer polymers; acrylic polymers such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, and acrylic acid-alkyl methacrylate copolymer; polyethyleneimine, cationic polymers, and the like.

[0051] Specific examples of inorganic water-soluble thickeners include bentonite, AlMg silicate, laponite, hectorite, and silicic anhydride, as well as clay minerals, xanthan gum, hydroxyethyl cellulose, and other polysaccharides.

[0052] In addition to the above-mentioned components, the aqueous cosmetic preparation according to this embodiment may contain other components typically used in cosmetics, such as glazing agents, moisturizing agents, viscosity adjusters, preservatives, pH adjusters, chelating agents, UV absorbers, vitamins, cosmetic ingredients, antioxidants, fragrances, etc., as needed, within a range that does not impair the effects of the present invention.

[0053] The aqueous cosmetic preparation according to this embodiment can be produced by dissolving or dispersing the above-mentioned components (A), (B), (C), (D), and (E) in water, as well as other components as necessary, and stirring and mixing them uniformly.

[0054] The aqueous cosmetic composition according to this embodiment can be used as a makeup cosmetic composition such as eyeliner, eyebrow pencil, eyeshadow, and mascara.

[0055] The aqueous cosmetic composition according to this embodiment can be used in any known product form used in cosmetics, such as a pen type (pen-shaped), a bottle type, or the like.

[0056] Pen-type cosmetic dispensers include a mechanical type that includes a cosmetic storage section, such as a fiber bundle impregnated with the cosmetic or a filling section filled with the cosmetic, and an application section made of a brush or felt attached to the storage section, and the cosmetic is forcibly dispensed by applying force to the storage section with a dial or knock, etc., and a pen-type that dispenses the cosmetic by the action of the surface tension of the liquid cosmetic and capillary action. [Example]

[0057] Examples of the present invention are shown in the table below.

[0058] The products used for each component are as follows: Alkyl acrylate copolymer emulsion: Yodosol GH800F (Akzo Nobel, solids concentration 45% by mass) Styrene / acrylates copolymer: Daitosol 5000STY (manufactured by Daito Chemical Industry Co., Ltd., solid content concentration 50% by mass) Acrylates / ethylhexyl acrylate copolymer: Daitosol 5000SJ (manufactured by Daito Chemical Industry Co., Ltd., solid content concentration 50% by mass) (Acrylates / ethylhexyl acrylate) copolymer (acrylates / methylstyrene / styrene) copolymer ammonium: Emmapoly CE-119N (manufactured by Nikko Chemicals Co., Ltd., solid content concentration 50% by mass) Alkyl acrylate copolymer: Luvimer 100P (BASF, solid content 50% by mass)

[0059] The evaluation criteria for the table are as follows:

[0060] Stability: Each sample was filled into a glass bottle and left at room temperature overnight, and the state of color unevenness and precipitation was visually observed and evaluated according to the following criteria. ◎: Very good (almost no uneven color or precipitation occurred) ◯: Good (almost no uneven color or precipitation occurred) ×: Poor (significant color unevenness and precipitation occurred)

[0061] Redispersibility: Each sample was filled into a glass bottle and left at room temperature for 7 days. The bottle was then shaken up and down by hand, and the number of reciprocating shakes required to redisperse the settled powder was counted and evaluated according to the following criteria. ◎: Very good (less than 10 times) 〇: Good (10 or more times but less than 20 times) ×: Bad (20 times or more)

[0062] Application: Each sample was filled into a container and applied to the inside of the upper arm in two lines, each 1 mm wide and 5 cm long. The quality of application was visually observed and evaluated according to the following criteria (included in the pastel tone and color development evaluation). ◎: Very good (almost no unevenness in the drawn lines) 〇: Good (no unevenness in color in the lines) ×: Poor (significant color unevenness and precipitation occurred)

[0063] Viscosity: Each sample was measured using a Brookfield viscometer (BL type) under the conditions of rotor No. 1, 60 rpm, 1 minute, and 25°C.

[0064] Table 1. Concentration dependence of component (A) crystalline cellulose [Table 1-1]

[0065] [Table 1-2]

[0066] From the results of Examples 1 to 3, good results were obtained in all items when the concentration of crystalline cellulose was in the range of 0.1 to 0.5% by mass, but when the concentration of crystalline cellulose was 0.7% by mass (Comparative Example 1), the viscosity increased and the applicability tended to deteriorate. Furthermore, when other thickeners were further added (Examples 4 to 6, Comparative Example 2), the same results as in Examples 1 to 3 and Comparative Example 1 were obtained.

[0067] Table 2: Types and amounts of component (B) white pigment and component (C) colored pigment [Table 2-1]

[0068] [Table 2-2]

[0069] The results of Examples 7 to 13 show that good results were obtained in all items, regardless of the type of colored pigment.

[0070] Table 3. Concentration dependence of component (D) film-forming polymer emulsion [Table 3-1]

[0071] [Table 3-2]

[0072] The results of Examples 14 to 19 show that when the blending amount of the film-forming polymer emulsion was in the concentration range of 5 to 40 mass %, good results were obtained in all items.

[0073] Table 4. Component (D) Film-forming polymer emulsion type [Table 4-1]

[0074] [Table 4-2]

[0075] The results of Examples 20 to 26 show that good results were obtained in all items, regardless of the type of film-forming polymer emulsion.

[0076] Table 5. Concentration dependence and types of component (E) water-soluble dispersant [Table 5-1]

[0077] Table 5-2

[0078] Table 5-3

[0079] Table 5-4

[0080] Table 5-5

[0081] Table 5-6

[0082] [Table 5-7]

[0083] From the results of Examples 27 to 50 and Comparative Example 3, it was found that not adding a water-soluble dispersant (Comparative Example 3) had an adverse effect on stability, and good results were obtained in all items when the amount of water-soluble dispersant added was in the concentration range of 0.2 to 7.1 mass %. Furthermore, good results were obtained in all items regardless of the type of water-soluble dispersant. [Industrial Applicability]

[0084] According to the present invention, even in aqueous cosmetic preparations containing a white pigment and a colored pigment, by blending crystalline cellulose, excellent redispersibility and a sedimentation suppressing effect can be obtained, and stability over time can be improved.

Claims

1. An aqueous cosmetic preparation comprising (A) crystalline cellulose, (B) a white pigment, (C) a colored pigment, (D) a film-forming polymer emulsion, and (E) a water-soluble dispersant, the aqueous cosmetic preparation having a viscosity of 100 mPa·s or less.

2. 2. The aqueous cosmetic according to claim 1, wherein the blending amount of (A) crystalline cellulose in the aqueous cosmetic is 0.01 to less than 0.7% by mass.

3. 3. The aqueous cosmetic preparation according to claim 1, wherein the blending ratio of component (B) to component (C), component (C) / (component (B)+component (C)), is 0.05 or more and 0.35 or less.

4. 4. The aqueous cosmetic according to claim 1, wherein the blending amount of the film-forming polymer emulsion (D) in the aqueous cosmetic is 1 to 45% by mass.

5. 5. The aqueous cosmetic according to claim 1, wherein the blending amount of the water-soluble dispersant (E) in the aqueous cosmetic is 0.01 to 10% by mass.

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