JP7211718B2 - liquid cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to liquid cosmetics that are excellent in storage stability and usability and that are suitable for makeup cosmetics such as eyeshadows, eyeliners, eyebrows and mascara.

Conventionally, pigments are excellent in hiding power and color development, so many pigment-containing cosmetics such as makeup cosmetics such as eyeshadow, eyeliner, eyebrow, mascara, cheek, and nail color have been used as coloring materials. is coming. Dispersing resins, surfactants, and the like are also used to improve the dispersibility of pigments.
On the other hand, organic pigments such as Red No. 202, Red No. 220, Red No. 226, Red No. 228, Yellow No. 401, Yellow No. 205, Yellow No. 4 Al lake, Yellow No. 203 Al lake, Red No. 104 Al lake, etc. It is used as a coloring material for cosmetic compositions such as make-up cosmetics. In particular, when organic pigments such as Red No. 226 and Red No. 228 are used, it takes a long time to disperse. There are problems such as low storage stability, and the current situation is that usability is not yet sufficient.

On the other hand, the following 1) to 3) are known as prior art documents that refer to dispersibility, storage stability, etc. of liquid cosmetics containing organic pigments and the like.
1) An eye makeup cosmetic containing at least lecithin or its hydrogenated product, a coloring agent containing titanium black as part or all of the coloring agent, and a nonionic surfactant having an HLB value of 10 or more (e.g., Patent Document 1) is known.
This eye makeup cosmetic uses titanium black as a coloring agent, the surface of the particles is coated with lecithin, and the coated portion is treated with a nonionic surfactant having an HLB value of 10 or more to stabilize in water. In spite of the fact that the pigment has a large specific gravity, there is no separation of the colorant, the density of drawn lines is high, and the eye makeup cosmetic has good wiping performance.

2) As a water-based eye shadow that is fresh when used, has excellent adhesion, has excellent flexibility of the coating film, and has excellent cosmetic longevity of powder ingredients such as pigments, pearlescent agents, and lame agents, the following components (a) to (d) (a) 0.3 to 4% by mass of a water-insoluble film-forming agent such as an alkyl acrylate copolymer emulsion dispersed in an aqueous solvent, (b) 15 to 40% by mass of a polyhydric alcohol, (c) di( An aqueous eye shadow (see, for example, Patent Document 2) characterized by blending an anionic surfactant such as tri) polyoxyethylene alkyl ether phosphate and (d) powder such as glitter powder is known. It is
3) Cosmetics with excellent water/oil repellency, longevity and stability that contain a monoalkyl phosphate represented by a specific formula, (B) a hydrophobic powder, and (C) an acrylic acid-based polymer. Characteristic cosmetics (see, for example, Patent Document 3) are known.

However, the above Patent Document 1 is an eye makeup cosmetic in which titanium black is stably dispersed with lecithin (POE phosphate ester, etc.) and a surfactant, and organic pigments such as carbon black and Red No. 226 and No. 228 are disclosed. There is no description or suggestion regarding the good color development and storage stability when the is dispersed.
The above-mentioned Patent Document 2 describes an aqueous eye shadow excellent in long-lasting makeup using POE alkyl ether phosphate, etc., and an alkyl acrylate copolymer emulsion containing pigments including Red No. 226 and Blue No. 404, but alkali-soluble acrylic There is no description or suggestion about the excellent storage stability when the acid alkyl copolymer or its salt is used.
The above-mentioned Patent Document 3 discloses a makeup with excellent persistence and stability using inorganic pigments such as fluorine compound-treated titanium oxide, organic pigments such as Red No. 201, and specific monoalkyl phosphates and acrylic acid-based polymers. However, there is no description or suggestion of using an organic pigment that is not surface-treated, and the "acrylic acid-based polymer" is not an alkali-soluble alkyl acrylate copolymer or a salt thereof, but simply acrylic acid. It is a polymer, and its technical concept differs from that of the present invention.

Japanese Patent Application Laid-Open No. 10-231233 (Claims, Examples, etc.) Japanese Patent Application Laid-Open No. 2008-247877 (Claims, Examples, etc.) Japanese Patent Application Laid-Open No. 9-143031 (claims, paragraph [0028], etc.)

Therefore, the present invention is intended to solve the above-mentioned conventional problems, etc., and is excellent in storage stability and usability of liquid cosmetics containing organic pigments such as Red No. 226 and Red No. 228. To provide a liquid cosmetic suitable for makeup cosmetics such as eyeshadow, eyeliner, eyebrow and mascara.

As a result of intensive studies on the above-mentioned conventional problems, the present inventors have found that at least water, an organic pigment, a phosphoric acid ester or a salt thereof, and a specific resin component are contained in a specific range. As a result, the inventors have found that the liquid cosmetic composition for the above purpose can be obtained, and have completed the present invention.
That is, the liquid cosmetic composition of the present invention contains at least an organic pigment, a phosphate ester or a salt thereof, an alkyl acrylate copolymer or a salt thereof, and a film-forming agent in a total amount of 1.0 to 20 in terms of solid content. % by mass and water.
The liquid cosmetic preferably has a viscosity value of 3 to 60 mPa·s when measured using a cone-plate viscometer at a temperature of 25° C. and a shear rate of 192 sec ⁻¹ .
The liquid cosmetic preferably has a surface tension of 32 mN/m or more when the surface tension is measured with a platinum plate at 25° C. using a plate method.
The content of the phosphoric acid ester or salt thereof is preferably 0.1 to 1.0% by mass with respect to the total amount of the liquid cosmetic composition.
The liquid cosmetic preferably has a pH in the range of 7 to 9 when measured using a glass electrode.
The content of the organic pigment is preferably 0.1 to 20% by mass with respect to the total amount of the liquid cosmetic composition.
The alkyl acrylate copolymer or salt thereof preferably contains at least one (alkyl acrylate/octyl acrylamide) copolymer.

According to the present invention, liquid cosmetics containing organic pigments such as Red No. 226 and Red No. 228 have excellent storage stability and usability and can be used as make-up cosmetics such as eyeshadows, eyeliners, eyebrows and mascara. A suitable liquid cosmetic is provided.

Embodiments of the present invention will be described in detail below.
The liquid cosmetic composition of the present invention contains at least an organic pigment, a phosphate ester or a salt thereof, an alkyl acrylate copolymer or a salt thereof, and a film-forming agent in a total amount of 1.0 to 20% by mass in terms of solid content. and water.

As the organic pigment used in the present invention, those used in liquid cosmetics such as make-up cosmetics can be used. Red No. 228, Blue No. 201, Blue No. 204, Blue No. 404, Yellow No. 401, Yellow No. 205, Yellow No. 4 Al lake, Yellow No. 203 Al lake, Red No. 104 Al lake, carmine, shikonin, orange 402 Al lake, At least one selected from organic pigments such as green 3Al lake, brown 201Al lake, black 401Al lake (each alone or in combination of two or more, the same applies hereinafter), and any organic pigment used in liquid cosmetics is not particularly limited.
As a complementary color, an appropriate amount of an inorganic pigment may be contained within a range that does not impair the effects of the present invention. Inorganic pigments include, for example, carbon black, titanium oxide, black titanium oxide, yellow iron oxide, black iron oxide, iron oxide, iron oxide, iron oxide, chromium oxide, chromium hydroxide, mica, talc, silica, glass, and at least titanium mica. 1 type is mentioned.

In the present invention, in particular Red No. 226 (Heringdon Pink CN, CI 73360), Red No. 228 (Permerton Red, CI 12085), Yellow No. 4 (Tartrazine, CI 19140), Organic pigments such as Blue No. 1 (Brilliant Blue FCF, C.I. 42040) do not have good dispersibility, and even if the organic pigments have low productivity, storage stability, etc. in the production thereof, the formulation composition of the present invention can be used. As a result, a liquid cosmetic containing the organic pigment having excellent storage stability and usability can be obtained.
The content of these organic pigments is 0.1 to 20% by mass, preferably 0.1 to 10% by mass, based on the total amount of the liquid cosmetic, from the viewpoint of color development, storage stability, usability, etc. % is desirable.
If the content of the organic pigment is less than 0.1% by mass, the coloring characteristic of the organic pigment becomes weak, while if it exceeds 20% by mass, the storage stability of the product becomes poor, which is not preferable.

The phosphate ester or salt thereof used in the present invention is not particularly limited as long as it is a phosphate ester-based surfactant used as a raw material for cosmetics. The use of acid ester surfactants is desirable, for example phosphoric acid monoesters of polyoxyethylene (POE) alkyl ethers or polyoxyethylene (POE) alkylaryl ethers, polyoxyethylene (POE) alkyl ethers or polyoxyethylene (POE) alkyl ethers. POE) at least one of alkylaryl ether phosphate diesters, vitamin C derivatives, phosphate triesters, and salts thereof. In the present invention, "a salt thereof" includes alkali metals such as sodium and potassium, ammonium, amines, and the like (the same shall apply hereinafter).
The "HLB value" in the present invention is the HLB value from the Kawakami method [HLB value = 7 + 11.7 log (MW / MO), MW: sum of formula weights of hydrophilic moieties, MO: sum of formula weights of lipophilic moieties] was calculated.
In the present invention, by using a phosphate surfactant having a preferred HLB value of 5 to 17, the feeling of use and storage stability of the pigment are further improved.

Specific usable phosphate surfactants include commercially available Plysurf series (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Phosphanol ML-220, RB-410, RD-510Y, and RD. -720N, RL-210, RL-310, RS-410, RS-610, RS-710 (manufactured by Toho Chemical Industry Co., Ltd.), NIKKOL DLP-10, DOP-8N, DDP-2, At least one of DDP-4, DDP-6, DDP-8, DDP-10 (manufactured by Nikko Chemicals Co., Ltd.) can be mentioned.

The total content of these phosphate esters or salts thereof is preferably 0.05 to 1.2% by mass, more preferably 0.05 to 1.2% by mass, based on the total amount of the liquid cosmetic, from the viewpoint of storage stability and usability. is preferably 0.1 to 1.0% by mass.
When the total content of the phosphate ester or its salt is less than 0.05% by mass, the storage stability is deteriorated. Even if the amount of the polymer or its salt is increased, the water resistance cannot be expressed, and the decrease in surface tension may slightly cause quality defects such as liquid leakage in the product form, which is not preferable.

The alkyl acrylate copolymer or salt thereof used in the present invention includes, for example, a copolymer whose starting monomer is at least one compound selected from acrylic acid, methacrylic acid, or alkyl esters thereof; At least one of copolymers (alkali-soluble acrylic resins) of acids, methacrylic acid, or one or more of their alkyl esters and octylacrylamide can be used.
Preferably, the copolymer whose raw material monomers are two or more compounds selected from acrylic acid, methacrylic acid, or alkyl esters thereof, has an acidic residue as a side chain in its repeating structure. Alkyl acrylate copolymers (alkali-soluble acrylic resins) that can be dissolved in water by neutralization are preferred. For neutralization, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, triethanolamine, L-arginine, aqueous ammonia, sodium hydroxide, etc. A pH adjuster can be used, and a particularly preferred one is aminomethylpropanol (2-amino-2-methyl-1-propanol).

Commercially available alkali-soluble acrylic resins that can be specifically used include AMPHOMER HC (manufactured by Akzo Nobel), which is an (alkyl acrylate/octylacrylamide) copolymer, and Luvimer 100P, which is an alkyl acrylate copolymer. (manufactured by BASF), DERMACRYL AQF (manufactured by Akzo Nobel), which is an alkyl acrylate copolymer emulsion, and the like can be used. Preferably, an (alkyl acrylate/octyl acrylamide) copolymer is used from the viewpoint of further improving the dispersibility of the pigment.
More preferably, the alkyl acrylate copolymer or salt thereof contains at least one (alkyl acrylate/octyl acrylamide) copolymer in order to further exhibit the effects of the present invention. desirable.

The content of the alkyl acrylate copolymers such as these alkali-soluble acrylic resins or salts thereof is determined from the viewpoint of the dispersion stability of the organic pigments and the longevity of the makeup. The ratio of the alkyl acrylate copolymer or its salt is 4:1 to 1:1, preferably 4:1 to 2:1 in terms of solid content, and the total amount of the liquid cosmetic in terms of solid content is 0.5 to 10% by mass, preferably 0.5 to 5% by mass. If the content of the alkyl acrylate copolymer such as the alkali-soluble acrylic resin or its salt is less than 0.5% by mass, precipitation and aggregation of the organic pigment tend to occur, color development is insufficient, and sufficient makeup is obtained. Film formation for exhibiting durability is not performed well. On the other hand, if it exceeds 10% by mass, the viscosity of the cosmetic tends to increase, causing problems during use.

In the case of the present invention, it is preferable to use a film-forming agent in combination with the dispersant of the alkyl acrylate copolymer such as the alkali-soluble acrylic resin or a salt thereof. The film-forming agent used in the present invention is other than a dispersing agent for alkyl acrylate copolymers such as alkali-soluble acrylic resins or salts thereof, such as acrylic acid, methacrylic acid, alkyl esters thereof, or Emulsion resins of copolymers selected from one or more monomers selected from derivatives, styrene, and vinyl acetate may be used.
Specifically, at least one of Daitosol 5000SJ and 5000AD (manufactured by Daito Kasei Kogyo Co., Ltd.) and Yodosol GH800F, 34F and GH41F (manufactured by Akzo Nobel) can be used.

The content of these film-forming agents is 0.5 to 15% by mass, preferably 0.5 to 10% by mass, based on the total amount of the liquid cosmetic, in terms of solid content, from the viewpoint of usability and longevity. desirable. If the content of the film-forming agent is less than 0.5% by mass, the film-forming to ensure long-lasting makeup is not carried out well. On the other hand, if it exceeds 15% by mass, the viscosity of the cosmetic tends to increase, causing problems during use.

The total content of these alkyl acrylate copolymers or salts thereof, and the film-forming agent, based on the total amount of the liquid cosmetic, in terms of the dispersion stability of the pigment and the durability of the makeup, is calculated as a solid content. is 1.0 to 20% by mass, preferably 1.0 to 15% by mass. If the total content of the alkyl acrylate copolymer or its salt is less than 1.0%, the color development, usability, and longevity of makeup are insufficient, and when the product is placed vertically in the product form, a difference in hue and blurring occur. Become cheap. On the other hand, if it exceeds 20%, the stability over time is affected, which is not preferable.

The liquid cosmetic of the present invention contains the organic pigment, the phosphate ester or its salt, the alkyl acrylate copolymer or its salt, and the film-forming agent in a total amount of 1.0 to 20 masses in terms of solid content. %, but within the range that does not impair the effects of the present invention, uses of liquid cosmetics (makeup cosmetics such as eye shadow, eyeliner, eyebrow, mascara, teak, nail color, concealer, foundation, eyelash , Hair cosmetics such as hair mascara), other raw materials such as solvents, thickeners, various surfactants other than the above (POE alkyl ether), preservatives (phenoxy ether, parabens), UV absorbers , antioxidants, anti-reduction agents, chelating agents, oily components, fragrances, animal and plant extracts, etc. can be contained in appropriate amounts.
In the present invention, the remainder (remainder) of the liquid cosmetic is adjusted with water (purified water, distilled water, ion-exchanged water, pure water, tap water, etc.).

Solvents that can be used are not particularly limited as long as they are used as solvents for liquid cosmetics. Examples include 1,3-butylene glycol, ethylhexylglycerin, ethanol, n-propyl alcohol, isopropyl alcohol, and n-butyl. At least one of alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, pentyl alcohol, propylene glycol, dipropylene glycol, phenoxyethanol and the like can be mentioned.
Examples of thickeners that can be used include xanthan gum, succinoglycan, acrylic thickeners, cellulose gum, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, and the like, from the viewpoints of applicability, storage stability, and suppression of pigment sedimentation. Cellulose thickeners such as stearoxyhydroxypropyl methylcellulose, hydroxypropyl guar hydroxypropyltrimonium chloride, cationized cellulose with cationic functional groups added to cellulose, vinyl thickeners such as polyvinyl alcohol, clay minerals such as bentonite At least one such as

The liquid cosmetic of the present invention has a pH of 6 to 9 when the pH is measured using a glass electrode in order to ensure the solubility of an alkali-soluble resin such as an alkyl acrylate copolymer and to suppress skin irritation. is preferably in the range of The pH is adjusted using the above-mentioned pH adjuster or the like.

In addition, the liquid cosmetic of the present invention has a viscosity of 25° C. at a temperature of 25° C. and a shear rate of 192 sec ⁻¹ using a cone and plate type viscometer from the viewpoints of usability, compatibility with the skin, convenience in manufacturing, etc. is preferably from 2 to 65 mPa·s, more preferably from 3 to 60 mPa·s. This viscosity range can be adjusted by suitably combining the above-mentioned pigment, phosphate ester or salt thereof, alkyl acrylate copolymer or salt thereof, and thickener to be used.

Furthermore, the liquid cosmetic of the present invention has a surface tension measured with a platinum plate at 25 ° C. using a plate method from the viewpoints of usability, compatibility with the skin, liquid retention in applicators and the like. The tension is preferably 30 mN/m or more, more preferably 32 mN/m or more. Although the upper limit is not particularly limited, 32 to 50 mN/m is particularly preferable.
If the surface tension of the liquid cosmetic is less than 30 mN/m, the drawn lines will bleed more on the skin, and the liquid cosmetic will easily drip from the applicator or the like, which is undesirable.
The surface tension can be adjusted by suitably combining the above-mentioned pigment, phosphate ester or salt thereof, alkyl acrylate copolymer or salt thereof, water, solvent, thickener and the like.

The liquid cosmetic composition of the present invention is prepared by adding the organic pigment, the phosphate ester or its salt, the alkyl acrylate copolymer or its salt, and the film-forming agent in a total amount of 1.0 to 20 masses in terms of solid content. % and each component such as water in the above preferable content range, etc., and can be produced by uniformly stirring and mixing. , surface tension.
In the blending system of the liquid cosmetic of the present invention configured as described above, when a film-forming agent is contained, a liquid cosmetic having excellent long-lasting properties can be obtained. Storage stability tends to be worse than formulations containing only phosphate esters such as phosphate esters or salts thereof. In the present invention, by containing predetermined amounts of a phosphate ester or a salt thereof and an alkyl acrylate copolymer or a salt thereof, the coating film is excellent in color development and storage stability, and has excellent water resistance and longevity. It is possible to obtain a liquid cosmetic with good usability, and as a more preferable form, it is possible to exhibit the effects of the present invention to a higher degree by using a liquid cosmetic having the above-mentioned viscosity range and the above-mentioned surface tension. becomes.

When using the liquid cosmetic of the present invention having such a structure, a general-purpose applicator used for liquid cosmetics such as makeup cosmetics such as eyeshadow, eyeliner, eyebrow, mascara, cheek, and nail color. can be used, and the shape and structure of the applicator used. The structure of the applicator body is not particularly limited, and examples thereof include an applicator equipped with a knock-type valve device, a mascara-type applicator, a tube-type applicator, and an applicator equipped with a piston pressing mechanism. be done.

EXAMPLES Next, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[Examples 1 to 14 and Comparative Examples 1 to 9: Preparation of liquid cosmetics]
Liquid cosmetics were prepared according to the formulations (liquid cosmetics for eyeliner) shown in Tables 1 and 2 below through steps such as dispersion treatment, stirring/mixing, and filtration. Tables 1 and 2 differ from each other in composition of organic pigments and the like used.
The obtained liquid cosmetics of Examples 1 to 14 and Comparative Examples 1 to 9 were evaluated for viscosity, surface tension, visual confirmation of hue, usability, product storage stability, etc. by the following evaluation methods. rice field.
These evaluation results are shown in Tables 1 and 2 below.

(Measurement of viscosity of liquid cosmetics)
The viscosity of each of the obtained liquid cosmetics was measured using a cone-plate viscometer (TVE-20L, manufactured by Toki Sangyo Co., Ltd.) under conditions of a temperature of 25° C. and a shear rate of 192 sec ⁻¹ .
(Measurement of pH value of liquid cosmetics)
The pH (25° C.) of each obtained liquid cosmetic was measured by a conventional method using a glass electrode pH meter (LAQUA F-72, manufactured by HORIBA).
(Measurement of surface tension of liquid cosmetics)
The surface tension was measured at 25° C. using a platinum plate surface tension meter (CBVP-Z, manufactured by Kyowa Interface Science Co., Ltd.).

(Usability evaluation method)
Each of the obtained liquid cosmetics was filled in a UC-76 or UC-22 container manufactured by Unicosmo Co., Ltd., and usability was evaluated according to the following evaluation criteria.
Evaluation criteria:
⊚: Very good longevity and water resistance without bleeding.
◯: There is almost no bleeding, and the make-up lasting and water resistance are good.
Δ: Bleeding is slightly observed, and the longevity of makeup and water resistance are slightly poor.
x: Poor bleeding, poor longevity of makeup, and poor water resistance.

(Evaluation method for product storage stability)
Each of the obtained liquid cosmetics was filled in an SV-30 screw cap bottle manufactured by Nichiden Rika Glass Co., Ltd. and evaluated for storage stability according to the following evaluation criteria.
Evaluation criteria:
⊚: Usability is good with no fading or color change over time storage.
Good: Usability is good with little fading or change in color after long-term storage.
Δ: Faintness or change in hue occurs due to long-term storage, but can be restored to a good state.
x: Distortion or change in color remarkably occurred during long-term storage, and the usability was poor.

As is clear from the results in Tables 1 and 2 above, Examples 1 to 14 of the present invention have brighter hues, usability, and storage stability than Comparative Examples 1 to 9, which are outside the scope of the present invention. It was confirmed to be excellent in all aspects.

Liquid cosmetics containing organic pigments such as Red No. 226 and Red No. 228 are suitable for make-up cosmetics such as eye shadows, eyeliners, eyebrows, mascara, etc., which have excellent vivid hues, storage stability, and usability. A liquid cosmetic is obtained.

Claims (6)

At least 2 to 20% by mass of an organic pigment, 0.05 to 1.2% by mass of a phosphate ester of HLB 5 to 17 or a salt thereof, an alkali-soluble alkyl acrylate copolymer or a salt thereof, and the alkali A total of 5.2 to 20% by mass of emulsion resin film-forming agents other than soluble alkyl acrylate copolymers or salts thereof, in terms of solid content, and water. ° C., a shear rate of 192 sec ⁻¹ , the viscosity value is 2 to 65 mPa s, and the surface tension is 30 mN / when the surface tension is measured with a platinum plate at 25 ° C. using the plate method. A liquid cosmetic, characterized in that it is at least m. 2. The liquid cosmetic according to claim 1, wherein the viscosity value is 3 to 60 mPa·s when the viscosity is measured using a cone-plate viscometer under conditions of a temperature of 25° C. and a shear rate of 192 sec ⁻¹ . fee. 3. The liquid cosmetic according to claim 1, wherein the surface tension is 32 to 50 mN/m or more when the surface tension is measured with a platinum plate at 25° C. using a plate method. 4. The composition according to any one of claims 1 to 3, wherein the content of the phosphoric acid ester or salt thereof is 0.1 to 1.0% by mass with respect to the total amount of the liquid cosmetic composition. liquid cosmetics. 5. The liquid cosmetic according to any one of claims 1 to 4, wherein the pH is in the range of 7 to 9 when measured using a glass electrode. The liquid cosmetic according to any one of claims 1 to 5 , wherein the alkyl acrylate copolymer or its salt contains at least one (alkyl acrylate/octyl acrylamide) copolymer. fee.