cosmetics

Abstract

To solve the problems in which: blending liquid cosmetics mainly composed of water with aluminum powder uncoated with silica causes corrosion over time, causing a change of a color tone and generation of hydrogen.SOLUTION: Silica-coated aluminum powder does not cause a change of a color tone or generation of hydrogen if the aluminum powder is blended with liquid cosmetics mainly composed of water. The present invention is liquid cosmetics comprising silica-coated aluminum powder.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a liquid cosmetic having a metallic luster. More specifically, the present invention relates to a liquid cosmetic that can maintain the metallic luster of a pigment, i.e., a liquid cosmetic that is excellent in storage stability because the aluminum powder pigment of a metallic color is less likely to settle and is uniformly dispersed, maintaining a good metallic luster. [Background technology]

[0002] Conventionally, cosmetics containing powder pigments have the potential for discoloration of the raw materials. In particular, when pigments are added to liquid cosmetics, the pigments that were uniformly dispersed tend to aggregate or settle and accumulate at the bottom of the container, resulting in poor storage stability, an important quality required for cosmetics.

[0003] For example, Japanese Patent Application Laid-Open No. 2001-270805 (Patent Document 1) discloses a glittering cosmetic containing glass flakes. However, although the disclosed invention may have been excellent at the time, it did not meet the level desired by the inventors in the above respects.

[0004] Meanwhile, in the section "2-3 Types and Forms of Makeup Cosmetics" of New Cosmetics (Non-Patent Document 1), it is stated that "Makeup cosmetics are made by dispersing pigments (organic, inorganic, pearlescent pigments, etc.) in various base materials. The forms and formulations of makeup cosmetics have advanced significantly over the years. Various formulations are produced taking into consideration the function, effect, and convenience of use of makeup. An overview of the types, formulations, and constituent ingredients of makeup cosmetics is shown in Table 2-2." Organic colorants, inorganic colorants, and pearlescent pigments are listed as raw materials. As such, makeup cosmetics containing pigments are extremely important cosmetics. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-270805 [Non-patent literature]

[0006] [Non-Patent Document 1] Edited by Takeo Mitsui, New Cosmetics, 3rd edition, Nanzando, August 20, 1997, p.378 Summary of the Invention [Problem to be solved by the invention]

[0007] However, cosmetics containing glitter pigments such as those disclosed in Patent Document 1 have the problem that when they are formulated into liquid formulations, the glassy flakes do not disperse uniformly but aggregate or settle, resulting in the failure to fully exhibit the glitter that is a feature of the product. Therefore, there has been a long-standing desire to develop a makeup cosmetic that has glitter, specifically a metallic luster, and can stably maintain that luster.

[0008] An object of the present invention is to provide a liquid cosmetic preparation that has a metallic luster and is excellent in stability and redispersibility. [Means for solving the problem]

[0009] In view of the above problems, the present inventors conducted extensive research into cosmetics with a metallic luster and, as a result, surprisingly found that by incorporating silica-coated aluminum powder, it is possible to obtain a liquid cosmetic that can stably maintain a metallic luster and has excellent stability over time and redispersibility of aluminum powder, which led to the completion of the present invention.

[0010] That is, the present invention provides a silica-coated aluminum powder. and Polyoxyethylene Behenyl Ether and Polyglyceryl-3 Disiloxane Dimethicone Including The average particle size of the aluminum powder is 10 to 70 μm. The present invention provides a liquid cosmetic preparation characterized by the above-mentioned.

[0012] Furthermore, the present invention provides the above liquid cosmetic, wherein the liquid cosmetic is an aqueous cosmetic.

[0013] The present invention also provides the liquid cosmetic described above, characterized in that the liquid cosmetic contains water in an amount of at least 30% by mass or more relative to the total amount of the cosmetic.

[0014] Furthermore, the present invention provides the above liquid cosmetic, characterized in that the liquid cosmetic is a makeup cosmetic.

[0015] The present invention also provides the above-mentioned makeup cosmetic, characterized in that the makeup cosmetic is any one selected from the group consisting of eyeliner, eyebrow, eye color, eye shadow, and water-based nail color. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a cosmetic that has a metallic luster and is excellent in stability and redispersibility. DETAILED DESCRIPTION OF THE INVENTION

[0017] The silica-coated aluminum powder used in the present invention is a powder obtained by coating commercially available aluminum powder (Al powder) with silica in accordance with a conventional method.

[0018] The average particle size of the aluminum powder is not limited as long as it is used as a cosmetic raw material and can exhibit metallic luster in the cosmetic, but from the viewpoint of dispersibility and the like, the average particle size is 10 to 95 μm, preferably 10 to 80 μm, and more preferably 10 to 70 μm. If the average particle size of the silica-coated aluminum powder is less than 10 μm, the metallic feel is insufficient, and if it exceeds 95 μm, the stability and redispersibility become poor. Any method can be used to coat aluminum powder with silica, and any silica-coated aluminum powder can be produced by a conventional method and used in the present invention. Of course, commercially available products can also be used.

[0019] Commercially available silica-coated aluminum powder that can be suitably used in the present invention includes Bright Silver Sea (manufactured by Eckert Co.).

[0020] In the present invention, in addition to the silica-coated aluminum powder, various glittering powders commonly used in the cosmetics field can also be used in combination depending on consumer demand. However, there is no need to blend other glittering powders, as this alone is sufficient to produce a metallic color, which is also an advantage of the present invention.

[0021] Other luster pigments that can be incorporated include, for example, titanium mica, synthetic phlogopite; coated synthetic phlogopite such as titanium oxide-coated synthetic phlogopite, iron oxide- or black iron oxide-coated mica titanium, and iron oxide-coated mica; coated mica titanium such as ferric iron-coated mica, carmine-coated mica, and titanium oxide / silica multilayer-coated mica; coated glass powders such as titanium oxide-coated glass powder, titanium oxide / iron oxide-coated glass powder, iron oxide-coated glass powder, silver-coated glass powder, and gold-coated glass powder; coated silica flakes such as titanium oxide / silica multilayer-coated silica flakes; polymer and aluminum laminate powders such as polyethylene terephthalate-epoxy-aluminum laminate powder, polyethylene terephthalate-aluminum laminate powder, and polyethylene terephthalate-polyurethane-11-aluminum laminate powder; and polymer laminate powders such as polyethylene terephthalate-polymethyl methacrylate laminate powder and polyethylene terephthalate-polyolefin laminate powder. These luster pigment powders can be used alone or in combination. Luster powders are commercially available.

[0022] The amount of silica-coated aluminum powder used in the present invention varies depending on the desired metallic effect, but is usually 1 to 30 mass %, preferably 2 to 20 mass %, and more preferably 2 to 15 mass %. If the amount of silica-coated aluminum powder is less than 1% by mass, the metallic feel is insufficient, whereas if it exceeds 30% by mass, the stability and redispersibility become poor.

[0023] The formulation of the liquid cosmetic of the present invention is not limited, but may be, for example, a solubilized liquid cosmetic, a two-layer or three-layer liquid cosmetic, an oil-in-water liquid cosmetic, etc. From the viewpoints of usability and ease of production in factories, it is preferable that the liquid cosmetic be an aqueous cosmetic containing water.

[0024] In particular, when aluminum powder is blended into a liquid cosmetic containing water, hydrogen may be generated or discoloration may occur if the powder is not coated with silica, and therefore the present invention is particularly useful in this regard.

[0025] In the present invention, in order to be called an aqueous cosmetic, the amount of water is 30 to 95% by mass, preferably 50 to 90% by mass, based on the total amount of the cosmetic.

[0026] If the amount of water is less than 30% by mass, there is a risk that the feeling during use will be poor, and if it exceeds 95% by mass, stability may be poor.

[0027] In the present invention, the desired liquid cosmetic is produced by a conventional method by blending any ingredients that can be blended in cosmetics according to the desired liquid cosmetic. For example, the desired liquid cosmetic is produced by blending colorants (e.g., inorganic pigments such as titanium oxide and iron oxide; organic pigments such as Red No. 226, Blue No. 1, and Yellow No. 4; pearl pigments such as titanium mica, etc.), solvents (polyhydric alcohols), film-forming agents, surfactants, thickeners, preservatives, pH adjusters, and antifoaming agents.

[0028] In the present invention, the liquid cosmetic is preferably a makeup cosmetic, such as an eyeliner, eyebrow pencil, eye color, eye shadow, water-based nail color, etc. However, it may also be a basic cosmetic depending on its function. [Example]

[0029] The examples and comparative examples shown in Table 1 below were produced by conventional methods, and their effects were examined.

[0030] How to evaluate glitter eyeliner

[0031] Stability: The prepared eyeliner is placed in a screw tube bottle and stored in a constant temperature bath at 50°C for one month, after which the color tone is evaluated. 〇: No change, △: Slight change, ×: Change

[0032] Redispersibility: The prepared eyeliner is placed in a screw tube and shaken 10 times to evaluate redispersibility. ◯: Good, △: Slight sedimentation, ×: Sedimentation

[0033] Application: The prepared eyeliner is filled into a container and the usability is evaluated. 〇: Can be drawn smoothly, △: Not so smooth, ×: Cannot be drawn

[0034] Metallic feel: The prepared eyeliner is filled into a container and used to evaluate the metallic feel. 〇: A lot, △: A little, ×: A little

[0035] [Table 1] [Industrial Applicability]

[0036] The liquid cosmetic of the present invention can provide a cosmetic having good stability and redispersibility, and can give a metallic luster to the face by applying it to the nails or around the eyes, making the face look more impressive and attractive.

Claims

1. A liquid cosmetic comprising silica-coated aluminum powder, polyoxyethylene behenyl ether, and polyglyceryl-3 disiloxane dimethicone, wherein the aluminum powder has an average particle size of 10 to 70 μm.

2. A liquid cosmetic as described in claim 1, characterized in that the liquid cosmetic is an aqueous cosmetic.

3. A liquid cosmetic according to claim 1 or 2, characterized in that the liquid cosmetic contains water in an amount of at least 30% by mass or more relative to the total amount of the cosmetic.

4. A liquid cosmetic according to any one of claims 1 to 3, characterized in that the liquid cosmetic is a makeup cosmetic.

5. The makeup cosmetic according to claim 4, characterized in that the makeup cosmetic is any one selected from the group consisting of eyeliner, eyebrow, eye color, eye shadow, and water-based nail color.

Images