Transparent claw material

Abstract

The present invention aims to develop a transparent nail polish with excellent film thickness and transparency. [Solution] The following components (A) and (B); (A) Cellulose derivatives with a refractive index of 1.47 to 1.65 (B) Powder with a refractive index of 1.48 to 1.55 A clear nail polish containing [specific ingredient].

Description

Technical Field

[0001] The present invention relates to a transparent nail cosmetic.

Background Art

[0002] Conventionally, it has been common practice to beautify nails by applying a top coat or the like to artificial nails such as nails or false nails. Many top coats are transparent liquids, and a cosmetic film is formed on the nails by applying and drying them on the nails. Various functions are required for top coats, such as makeup retention, gloss, transparency, and film thickness. Therefore, various studies have been made to achieve these functions. For example, a technique has been disclosed in which by blending a film-forming agent, a solvent, and specific fine particles, the film hardness and glossiness are improved, and a film excellent in hardness and gloss and luster can be formed on the nails (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, with the conventional technology, satisfactory quality in terms of film thickness and transparency could not be obtained. Therefore, an object of the present invention is to develop a transparent nail cosmetic excellent in film thickness and transparency.

Means for Solving the Problems

[0005] As a result of intensive studies, the present inventors have found that a transparent nail cosmetic combining a cellulose derivative having a refractive index of 1.47 to 1.65 and a powder having a refractive index of 1.48 to 1.55 is excellent in film thickness and transparency, and have thus completed the present invention.

[0006] That is, the present invention includes the following. [1] The following components (A) and (B); (A) Cellulose derivatives with a refractive index of 1.47 to 1.65 (B) Powder with a refractive index of 1.48 to 1.55 A clear nail polish containing [specific ingredient]. [2] Furthermore, the transparent nail polish described in [1] contains ingredient (C) alkyd resin. [3] The transparent nail polish according to [2], wherein the mass ratio of the total content of components (A) and (C) to component (B) [(A)+(C)] / (B) is 1 to 15. [4] The transparent nail polish according to any one of [1] to [3], wherein the aforementioned component (A) is nitrocellulose or ethylcellulose. [5] The clear nail polish according to any one of [1] to [3], wherein the aforementioned component (B) is one or more selected from the group consisting of camphor, coumarin, vanillin, and borneol. [6] A transparent nail polish according to any one of [1] to [3], wherein the content of component (B) is 2 to 5% by mass. [7] Furthermore, a clear nail polish containing ingredient (D) sucrose benzoate, as described in any of [1] to [3]. [8] The transparent nail polish according to [7], wherein the mass ratio (B) / (D) of component (B) to component (D) is 0.1 to 0.8. [Effects of the Invention]

[0007] The present invention makes it possible to provide a transparent nail polish with excellent film thickness and transparency. [Modes for carrying out the invention]

[0008] Preferred embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following preferred embodiments and can be freely modified within the scope of the present invention. In this specification, percentages are expressed in mass unless otherwise specified. In this specification, when a numerical range is expressed using "~", the range includes the values ​​at both ends. In addition, the upper limit (less than or equal to) and lower limit (greater than or equal to) of each numerical range (~) can be arbitrarily combined as desired. The refractive index can be measured using an Abbe refractometer by the critical angle method. It is calculated by placing the sample (as is in the case of a liquid, or using a contact liquid in the case of a solid) between two prisms and changing the angle with respect to the incident light to determine the refractive index (angle of refraction).

[0009] Component (A) used in the present invention is a cellulose derivative with a refractive index of 1.47 to 1.65. Here, refractive index is the value obtained by dividing the speed of light propagation in air by the speed of light propagation in a substance. In the present invention, the refractive index of component (A) is 1.47 to 1.65, particularly preferably 1.50 or higher, more preferably 1.55 or higher, and even more preferably 1.60 or higher. Also, 1.63 or lower is preferred, 1.62 or lower is more preferred, and 1.61 or lower is even more preferred. Furthermore, 1.50 to 1.63 is preferred, 1.55 to 1.62 is more preferred, and 1.60 to 1.61 is even more preferred. Within this range, transparency and gloss are superior, and therefore more preferred.

[0010] Examples of such cellulose derivatives include nitrocellulose (refractive index: 1.608) and ethylcellulose (refractive index: 1.470). Component (A) used in the present invention is preferably nitrocellulose or ethylcellulose, and more preferably nitrocellulose, from the viewpoint of film thickness. Commercially available products include Nitrocellulose H1 / 2 (manufactured by Asahi Kasei Corporation) and ethylcellulose AQUALON EC N-14 (manufactured by Ashland Corporation).

[0011] The content of component (A) used in the present invention is not particularly limited, but is preferably 10% or more, more preferably 11% or more, and even more preferably 12% or more, relative to the total amount of the transparent nail polish. Also, 15% or less is preferred, more preferably 14% or less, and even more preferably 13% or less. Furthermore, 10-15% is preferred, more preferably 11-14%, and even more preferably 12-13%. This range is preferable because it provides superior film thickness.

[0012] The component (B) used in this invention is a powder with a refractive index of 1.48 to 1.55. The powder used for component (B) is not particularly limited as long as its refractive index is between 1.48 and 1.55, regardless of particle size, shape, presence or absence of porosity, etc., and any powder commonly used in cosmetics can be used.Specific examples of such components (B) include camphor (refractive index: 1.546), coumarin (refractive index: 1.510), vanillin (refractive index: 1.485), borneol (refractive index: 1.483), etc., and one or more of these can be used. As for commercially available products, a good example of camphor is dl-camphor from the Japanese Pharmacopoeia (manufactured by Nippon Seika Co., Ltd.).

[0013] In the present invention, the refractive index of component (B) is 1.48 to 1.55, with a refractive index of 1.49 or higher being particularly preferred, 1.50 or higher being more preferred, and 1.51 or higher being even more preferred. Furthermore, a refractive index of 1.49 to 1.55 is preferred, 1.50 to 1.55 is more preferred, and 1.51 to 1.55 is even more preferred. This range is more preferable because it provides superior transparency.

[0014] Component (B) is preferably one or more selected from the group consisting of camphor, coumarin, vanillin, and borneol, more preferably one or more selected from the group consisting of camphor, coumarin, and vanillin, and more preferably one or two selected from the group consisting of camphor and coumarin. Within this range, it is more preferable because it provides superior transparency.

[0015] The content of component (B) used in the present invention is not particularly limited. For example, it is preferably 2% or more, more preferably 3% or more, and even more preferably 4% or more, based on the total amount of the clear nail cosmetic. Also, it is preferably 5% or less. Further, 2 - 5% is preferable, 3 - 5% is more preferable, and 4 - 5% is even more preferable. Being within this range is more preferable because the transparency is excellent.

[0016] In the present invention, the content mass ratio (A) / (B) of component (A) to component (B) is not particularly limited. For example, it is preferably 1 or more, more preferably 1.5 or more, and even more preferably 2 or more. Also, it is preferably 10 or less, more preferably 8 or less, and even more preferably 7 or less. Further, 1 - 10 is preferable, 1.5 - 8 is more preferable, and 2 - 7 is even more preferable. Being within this range is more preferable because the film thickness and transparency are excellent.

[0017] The present invention can further contain component (C), an alkyd resin. An alkyd resin is a synthetic resin composed of a polyester produced by a condensation reaction of a polyhydric alcohol and a polybasic acid. Examples of such alkyd resins include phthalic acid - based alkyd resins such as (phthalic anhydride / benzoic acid / glycerin) copolymers. Containing component (C) is more preferable because the film thickness is excellent. Commercially available products include Alkydia DB - 174K (Vekozole) (manufactured by Dainippon Ink and Chemicals, Inc.) and the like.

[0018] The content of component (C) used in the present invention is not particularly limited. For example, it is preferably 1% or more, more preferably 1.5% or more, based on the total amount of the clear nail cosmetic. Also, it is preferably 4% or less, more preferably 3% or less, and even more preferably 2.5% or less. Further, as a range, 1 - 4% is preferable, 1 - 3% is more preferable, and 1.5 - 2.5% is even more preferable. Being within this range is more preferable because the film thickness is excellent.

[0019] The mass ratio [(A)+(C)] / (B) of the total content of the component (A) and the component (C) to the component (B) is not particularly limited. For example, 1 or more is preferable, 2 or more is more preferable, and 3 or more is even more preferable. Also, 15 or less is preferable, 10 or less is more preferable, 8 or less is even more preferable, and 5 or less is most preferable. Further, 1 to 15 is preferable, 2 to 10 is more preferable, 3 to 8 is even more preferable, and 3 to 5 is most preferable. When it is within this range, it is more preferable because the film thickness and transparency are more excellent.

[0020] The present invention can further contain component (D) sucralose benzoate. Sucralose benzoate is an ester obtained by dehydrative condensation of benzoic acid and sucrose. Sucralose benzoate is known to impart appropriate flexibility and flexibility to the film and improve durability and processability. In the present invention, by containing the component (D), it is more preferable because the flexibility and film thickness of the film are excellent. Examples of commercially available products include Monopet SB (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.).

[0021] The content of the component (D) used in the present invention is not particularly limited. For example, 7% or more is preferable, 8% or more is more preferable, and 9% or more is even more preferable with respect to the total amount of the transparent nail cosmetic. Also, 13% or less is preferable, 12% or less is more preferable, and 11% or less is even more preferable. Further, 7 to 13% is preferable, 8 to 12% is more preferable, and 9 to 11% is even more preferable. When it is within this range, it is more preferable because a flexible cosmetic film is formed while having a film thickness.

[0022] The mass ratio of the component (B) to the component (D), (B) / (D) is not particularly limited. For example, 0.1 or more is preferable, 0.2 or more is more preferable, and 0.3 or more is even more preferable. Also, 0.8 or less is preferable, 0.6 or less is more preferable, and 0.5 or less is even more preferable. Further, as a range, 0.1 to 0.8 is preferable, 0.2 to 0.6 is more preferable, and 0.3 to 0.5 is even more preferable. When it is within this range, it is more preferable because a flexible cosmetic film is formed while having a film thickness.

[0023] In addition to the above-mentioned components (A) to (D), the transparent nail polish of the present invention may appropriately contain components commonly used in cosmetics, such as oily components, powders, surfactants, UV absorbers, humectants, color-fastening agents, antioxidants, defoaming agents, beauty ingredients, preservatives, fragrances, etc., to the extent that they do not impair the effects of the present invention.

[0024] Examples of powders that are commonly used in cosmetics include, for example, powders with shapes such as plates or needles, particle sizes such as mist, fine particles, or pigment grade, and particle structures such as porous or non-porous. Examples include white inorganic pigments, colored inorganic pigments, white-based powders, lustrous powders, resin powders, organic powders, metal powders, composite powders, and fibers. Specifically, titanium dioxide, zinc oxide, cerium oxide, barium sulfate, iron oxide, carbon black, titanium / titanium oxide sintered products, chromium oxide, chromium hydroxide, Prussian blue, ultramarine, muscovite, phlogopite, red mica, biotite, synthetic mica, sericite, talc, synthetic sericite, silicon carbide, bentonite, smectite, aluminum oxide, magnesium oxide, zirconium oxide, antimony oxide, diatomaceous earth, aluminum silicate, magnesium aluminum metasilicate, calcium silicate, barium silicate, magnesium silicate, calcium carbonate, magnesium carbonate, hydroxyapatite, boron nitride, titanium dioxide-coated mica, titanium dioxide-coated bismuth oxychloride, iron oxide mica Examples include Prussian blue treated titanium mica, carmine treated titanium mica, bismuth oxychloride, fish scale foil, polyethylene terephthalate-aluminum-epoxy laminated powder, polyethylene terephthalate-polyolefin laminated film powder, polyethylene terephthalate-polymethyl methacrylate laminated film powder, fluororesins, cellulose resins, zinc stearate, N-acyllysine, silk powder, cellulose powder, dextrin powder, aluminum powder, gold powder, silver powder, fine particle titanium oxide coated titanium mica, fine particle zinc oxide coated titanium mica, barium sulfate coated titanium mica, titanium oxide-containing silicon dioxide, zinc oxide-containing silicon dioxide, polyester fibers, rayon fibers, cellulose fibers, etc. These may be surface-treated with fluorine compounds, silicone oil, powders, oils, gelling agents, emulsion polymers, surfactants, etc.

[0025] In the transparent nail polish of the present invention, the presence of powder may result in inferior transparency, and it is preferable that the powder is substantially absent. In the present invention, substantially absent means either not present at all or present in an amount of 1% or less. In particular, 1% or less is preferred, 0.5% or less is more preferred, 0.01% or less is even more preferred, and it is most preferable that the powder is not present at all.

[0026] In this invention, "transparent" means that the transmittance at a wavelength of 700 nm is 93% or higher. In this invention, the transmittance is the value obtained by using a visible spectrophotometer (UV-2500 PC, manufactured by Shimadzu Corporation) with a glass cell (optical path length 10 mm × optical path width 5 mm) to determine the transmittance at a wavelength of 700 nm.

[0027] The method for producing the transparent nail polish of the present invention is not particularly limited and can be obtained by conventional methods. For example, it can be obtained by uniformly dispersing component (A), component (B), and optionally components (C), (D), and other components in a solvent at 25°C and filling it into a container.

[0028] The dosage form of the transparent nail polish of the present invention is not particularly limited, and examples include oil-based and solvent-based formulations. Furthermore, the properties of the transparent nail polish are not particularly limited, and examples include liquid, cream, and gel forms. The transparent nail polish of the present invention is not particularly limited and can be used, for example, as a top coat, nail polish base, or nail oil.

[0029] Furthermore, the present invention may also have the following configurations. [1] The following components (A) and (B); (A) Cellulose derivatives with a refractive index of 1.47 to 1.65 (B) Powder with a refractive index of 1.48 to 1.55 A clear nail polish containing [specific ingredient]. [2] Furthermore, the transparent nail polish described in [1] contains ingredient (C) alkyd resin. [3] The transparent nail polish according to [2], wherein the mass ratio of the total content of components (A) and (C) to component (B) [(A)+(C)] / (B) is 1 to 15. [4] The transparent nail polish according to any one of [1] to [3], wherein the aforementioned component (A) is nitrocellulose or ethylcellulose. [5] The clear nail treatment described in any of [1] to [4], wherein component (B) is one or more selected from the group consisting of camphor, coumarin, vanillin, and borneol. [6] A transparent nail polish according to any one of [1] to [5], wherein the content of component (B) is 2 to 5% by mass. [7] Furthermore, a clear nail polish containing ingredient (D) sucrose benzoate, as described in any of [1] to [6]. [8] The transparent nail polish according to [7], wherein the mass ratio (B) / (D) of component (B) to component (D) is 0.1 to 0.8. [Examples]

[0030] The present invention will be described in detail below with reference to examples. However, these examples do not limit the present invention in any way. Examples 1-13 and Comparative Examples 1-3: Top Coat The topcoats with the formulations shown in Tables 1 and 2 below were prepared using the following manufacturing method, and their film thickness and transparency were evaluated using the evaluation method described below. The results are also shown in Tables 1 and 2.

[0031] [Table 1]

[0032] [Table 2]

[0033] (Manufacturing method) A: Mix and dissolve components (1) to (12) uniformly at 25°C. B: A was filled into a glass container to obtain a top coat.

[0034] (Evaluation method) Each of the following evaluation items was evaluated using the method described below. (Evaluation criteria) I. Film thickness Ten cosmetic experts evaluated each sample on a four-point scale, according to the absolute evaluation criteria below, to determine whether or not they felt a thickness in the cosmetic film when applied to their nails. <Absolute evaluation criteria> (Rating) : (Evaluation) 4: Very good 3: Fairly good 2: Slightly bad 1: Very bad <Judgment criteria> (Judgment): (Average score of the ratings) AA: over 3.8 points A: More than 3.5 points and less than 3.8 points B: More than 3.3 points and less than 3.5 points C: More than 3.0 points and less than 3.3 points D: More than 1.5 points and less than 3.0 points E: 1.5 points or less (Evaluation criteria) b. Transparency Using a visible spectrophotometer (UV-2500 PC, manufactured by Shimadzu Corporation) and a glass cell (optical path length 10 mm x optical path width 5 mm), the transmittance at a wavelength of 700 nm was measured, and the transmittance was judged based on the following criteria. <Judgment criteria> (Judgment) :(Transmittance) AA: 99% or higher A: 97% or more but less than 99% B: 95% or more but less than 97% C: 93% or more but less than 95% D: 91% or more but less than 93% E: Less than 91%

[0035] As is clear from the results in Tables 1 and 2, the topcoats of Examples 1 to 13 of the present invention exhibited excellent film thickness and transparency. On the other hand, Comparative Example 1, which used a cellulose derivative with a refractive index of less than 1.47 for component (A), showed excellent transparency, but did not achieve satisfactory film thickness. Furthermore, Comparative Example 2, which did not contain component (B), did not achieve satisfactory transparency, and Comparative Example 3, which used a powder with a refractive index of less than 1.48 for component (B), also did not achieve satisfactory transparency.

[0036] Example 14: Top Coat Ingredients (%) 1. Nitrocellulose 13 2. Conference 4 3. (Phthalic anhydride / benzoic acid / glycerin) copolymer 2 4. Sucrose benzoate 10 5. Purple 201 1 6. Tocopherol acetate 0.03 7. Tocopherol 0.01 8. Damask rose flower extract 0.005 9. Squalane 0.1 10. Lecithin 0.005 11. Proline 0.001 12. Isododecane 0.0001 13. Methyltrimethicone 0.02 14. Dimethicone 2 15.Wednesday 0.05 16. Ethanol 0.3 17. Ethyl acetate 20 18.Fragrance 1 19. Butyl acetate (remaining amount)

[0037] (Manufacturing method) A: Mix and dissolve components (1) to (19) uniformly at 25°C. B: A was filled into a glass container to obtain a top coat.

[0038] The topcoat of Example 14 exhibited excellent film thickness and transparency.

[0039] Example 15: Nail oil Ingredients (%) 1. Nitrocellulose 12 2. (Phthalic anhydride / benzoic acid / glycerin) copolymer 2.4 3. Ethyl acetate 20 4. Butyl acetate remaining amount 5. Isopropyl alcohol 3 6. Sucrose benzoate 10 7. Dextrin isostearate 0.8 8. Argan oil 0.1 9. Lavender oil 0.1 10. Squalane 0.1 11. Ascorbyl dipalmitate 0.005 12. Rosehip extract 0.01 13. Rose water 0.1 14.Blue No. 1 0.02 15.Fragrance 0.6 16. Heptane 0.5 17. Isopropyl myristate 10 18. Hydrogenated polyisobutene 4 19. Octocrylene 0.3 20. Acetyl tributyl citrate 5 21. Conference 3

[0040] (Manufacturing method) A: Dissolve and mix components (1) to (21) uniformly at 25°C. B: A was filled into a container containing the application material to obtain nail oil.

[0041] The resulting nail oil exhibited excellent film thickness and transparency.

Claims

1. The following components (A) and (B); (A) Cellulose derivatives with a refractive index of 1.47 to 1.65 (B) Powder with a refractive index of 1.48 to 1.55 A clear nail polish containing [specific ingredient].

2. The transparent nail polish according to claim 1, further containing ingredient (C) alkyd resin.

3. The transparent nail polish according to claim 2, wherein the mass ratio of the total content of components (A) and (C) to component (B) [(A) + (C)] / (B) is 1 to 15.

4. The transparent nail polish according to any one of claims 1 to 3, wherein the component (A) is nitrocellulose or ethylcellulose.

5. The transparent nail polish according to any one of claims 1 to 3, wherein the component (B) is one or more selected from the group consisting of camphor, coumarin, vanillin, and borneol.

6. The transparent nail polish according to any one of claims 1 to 3, wherein the content of component (B) is 2 to 5% by mass.

7. Furthermore, the transparent nail polish according to any one of claims 1 to 3, further containing ingredient (D) sucrose benzoate.

8. The transparent nail polish according to claim 7, wherein the mass ratio (B) / (D) of component (B) to component (D) is 0.1 to 0.8.

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