JPH0560802B2 - - Google Patents

Abstract

PURPOSE:A makeup cosmetic, obtained by blending flaky processed powder prepared by coating the surface of flaky inorganic powder having the major axis, minor axis and thickness within specific ranges with titanium oxide and/or iron oxide and having smooth extensibility as well as improved adhesive and hiding properties. CONSTITUTION:A cosmetic obtained by coating the surface of flaky inorganic power, particularly cleaved inorganic powder, e.g. cleaved talc. cleaved mica, etc.,having 0.5-50mu major axis, 0.2-30mu minor axis and 0.005-0.1mu thickness, more preferably both the major and the minor axes within the range of 0.5-20mu and the thickness within the range of 0.01-0.1mu with titanium oxide and/or iron oxide, preferably at 1-80wt% covering ratio based on the total flaky processed powder. The amount of the blended flaky processed power is preferably 0.5-85wt% based on the total cosmetic. EFFECT:Thin makeup finish.

Description

[Detailed description of the invention]

The present invention relates to a cosmetic with a novel feel, and more specifically, a cosmetic that spreads smoothly on the skin, has excellent adhesion and concealing properties, and is suitable as a cosmetic with a thin makeup finish, especially as a makeup cosmetic. It is intended to provide something. Conventionally, titanium dioxide has been used in cosmetics as a white pigment with hiding power, and is useful for covering stains, freckles, etc., and as a sunscreen.
However, cosmetics containing titanium dioxide tend to spread extremely hard on the skin, which not only worsens the feeling of use, but also causes unevenness, which sometimes impairs the cosmetic finishing effect. Since this tendency becomes more pronounced as the amount of titanium dioxide added increases, it becomes a problem that contradicts the above-mentioned concealing effect. On the other hand, titanium mica is widely used in cosmetics as a pearl pigment with hiding power and transparency.
It is used in cosmetics that aim to create a pearly look, especially in make-up point agents such as eye color, lip color, and nail color. However, make-up cosmetics containing titanium mica, such as solid foundations, have a smooth feel on the skin, but when the pearly feel is emphasized, fine lines on the skin become noticeable and the natural luster is lost. In some cases, this may cause dullness of the skin and worsen the effect of makeup finishing. This tendency becomes more pronounced as the amount of mica titanium added increases, so the addition of makeup cosmetics has been limited to those that require only the point effect derived from the pearly feel of make-up cosmetics. Incidentally, various attempts have been made to solve the above problems. That is, in the case of titanium dioxide, surface-treated titanium dioxide obtained by coating the surface of titanium dioxide with an inorganic substance such as alumina, silica, or yellow iron oxide, or an organic substance such as a higher fatty acid or a salt thereof is used. Method (JP-A-59-98009 and JP-A-58-49307)
However, the former method using surface-treated titanium dioxide still does not sufficiently improve the spreadability and spreadability on the skin. It is hard to say that it is excellent in terms of uniformity during application and cosmetic finishing effect. In addition, although the latter method using fine particle titanium dioxide improves adhesion and uniformity,
In terms of smoothness on the skin, it was rather moist and spreadable. Similarly, there are methods to improve titanium mica, such as using titanium mica that has a less pearly feel.
Although the smoothness of application, adhesion, uniformity, and hiding power on the skin were good, the makeup had a thick and unnatural finish. On the other hand, thin plate-like inorganic powders such as cleaved sericite are also known as powder components that have transparency and smooth spread, and have also been used in some cosmetics. However, the thickness of cleaved sericite is so thin that no hiding power can be expected, and in powder mixture systems, the degree of difference in particle size from other powders is too uneven, so as a result, the original It was not possible to obtain a thin finish, but rather a thick, thick finish with a white cast. Therefore, in view of the above-mentioned current situation, the present invention aims to provide a cosmetic with a novel feel that combines smooth spread, adhesion, uniformity, concealment, and a natural and thin makeup finish effect. do. As a result of extensive research, the present inventors have discovered that the powder has a specific particle diameter (major axis, minor axis, thickness), that is, it is thinner than ordinary powder and is thinner than cleaved inorganic powder. By obtaining the fact that thick powder has characteristics that satisfy the original smoothness of spread and thinness of finish as cosmetics, and also by providing adhesion and concealing power in conjunction with this,
It was discovered that all the problems could be solved, and based on this knowledge, the present invention was completed. That is, the present invention has a major axis of 0.5 to 50μ and a minor axis of 0.2
Contains processed thin plate powder made by coating the surface of cleaved thin plate-like inorganic powder (excluding titanium dioxide) with titanium dioxide and/or iron oxide in the range of ~30μ and thickness 0.005 to 0.1μ. The present invention relates to cosmetics characterized by: The present invention will be explained in detail below. The cleaved thin plate-like inorganic powder applied to the present invention excludes titanium dioxide, and its particle size is 0.5 to 50μ in major axis, 0.2 to 30μ in minor axis, and 0.005 to 0.005μ in thickness.
0.1 μ (average thickness 0.02 to 0.08 μ), more preferably 0.5 to 20 μ in both long and short axes, thickness 0.01 to 0.1 μ (average thickness 0.03 to
It is a specific inorganic powder with a range of 0.08μ),
Existing inorganic powders that satisfy the conditions that can be used as substrates for such thin plate-shaped processed powders include cleaved inorganic powders such as cleaved talc, cleaved mica, and cleaved sericite. From this point of view, cleaved sericite is most preferred, but it is not limited to these inorganic powders as long as it satisfies the above conditions. Grinding and cleavage are performed to make the inorganic powder into the specified size. While pulverization reduces the major axis, minor axis, and thickness in all aspects, cleavage has almost no effect on the major axis and minor axis,
Selectively reduce only the thickness. If the major and minor axes are smaller than the above range, even if coating is performed, the desired layered ductility (good elongation) cannot be obtained due to random orientation, and the shear embrittlement is insufficient, resulting in a desirable cosmetic composition. On the other hand, if it becomes hard and becomes larger than the above range, a covering will be added to it, causing a feeling of foreign body or discomfort on the skin. On the other hand, if the thickness is smaller than the above range, the hardness of the plate-shaped powder will be insufficient, and for example, the plate-shaped powder will exhibit flexibility in the molded product (cosmetic), so if the coating is Even if some hardness reinforcement is performed, the desired layered ductility cannot be obtained. On the other hand, if the thickness becomes larger than the above range, the coated processed powder will no longer have the same thickness as normal powder,
This results in a thick, uneven finish. Next, titanium dioxide or iron oxide (including iron oxyoxide) is added to the cleaved thin plate-like inorganic powder described above.
The coating method itself can be selected from various known methods such as physicochemical mixed grinding method (dry method, wet method) or chemical deposition method, which will be described later. Deposition methods are advantageously used in view of the ease of controlling the desired coverage and the uniformity of the resulting coating. However, the amount of titanium dioxide and/or iron oxide coated on the cleaved thin plate-like inorganic powder is important;
For example, although the amount of coating varies depending on the thickness of the cleaved thin plate-like inorganic powder itself that serves as the substrate, it is approximately 1 to 80% by weight, preferably 5 to 70% by weight of the entire thin plate-like processed powder. A range is selected. If the coverage is less than 1% by weight, the required hiding power will not be obtained and the powder will appear transparent, while if it exceeds 80% by weight, the covering power and adhesion will be good, but the properties of the coating powder will become stronger. , it becomes impossible to obtain smooth elongation. The thin plate-shaped processed powder according to the present invention thus obtained can be used as it is or, if necessary, further surface-treated with a known treatment agent to produce cosmetics that generally require the use of powder. It can be blended therein in the same manner as conventional inorganic pigments.
Cosmetics obtained in this way include liquid foundation, powder foundation,
Mainly make-up cosmetics such as cake foundation, makeup foundation, face powder, lipstick, blush, eyeliner, eye shadow, eyebrow pencil, etc., as well as body powder, antiperspirants, sunscreen cream, and whitening powder. Examples include a wide range of products such as , emulsion, lotion, etc. Even among the above-mentioned cosmetics, especially solid cosmetics such as powder foundation, cake foundation, state foundation, and face powder, the texture when applied and spread on the skin is particularly important. Since it has the most remarkable cosmetic finish effect, it is the most suitable cosmetic for the present invention. In addition, as a surface treatment method for the above-mentioned thin plate-shaped processed powder, for example, with the aim of improving water resistance and sweat resistance, silicone oil, fluorine-based oil containing a perfluoroalkyl group, higher fatty acid or its salt,
Examples include a method of treating with a higher fatty acid ester or the like, or a method of treating with lecithin, hydrogenated lecithin, acyl amino acid, peptide, etc. for the purpose of imparting a moist feeling. In addition, the amount added to the cosmetics mentioned above is as follows:
It is arbitrarily selected depending on the properties of the cosmetic, for example, approximately 0.5 to 40% by weight for liquid foundation.
For cake foundations, it is approximately 1 to 80% by weight,
In powder foundations, it is approximately 1.5 to 85% by weight, in face powders, it is approximately 1 to 95% by weight, and in creams, it is approximately 0.5 to 20% by weight, etc. Therefore, it is usually approximately 0.5 to 95% by weight of the entire cosmetic product. Preferably a range of 2 to 85% by weight is selected. Furthermore, in addition to the thin plate-like processed powder, the cosmetic of the present invention also contains various ingredients commonly used in cosmetics, such as oils and fats, waxes, surfactants, antioxidants, fragrances, pigments/powders, and alcohol. , polyhydric alcohols, medicinal ingredients, ultraviolet absorbers, thickeners,
A chelating agent, water, etc. can be added. Here, in order to explain the present invention in more detail, an example of manufacturing a thin plate-shaped processed powder according to the present invention will be shown below. Production Example 1 Cleaved sericite (major axis 0.7~20μ, minor axis 0.2~
10μ, average thickness 0.08μ) was thoroughly stirred and heated while being uniformly dispersed, and boiled for about 3 hours. After cooling, it was filtered and washed with water, and fired at 300°C to obtain 200 parts of cleaved sericite coated with titanium dioxide. Production Example 2 Titanium dioxide (30% by weight) coated cleaved sericite (major diameter 0.9~ Add 400 parts of 25μ, minor axis 0.5 to 20μ, average thickness 0.09μ), heat the slurry to 80℃ while stirring, and keep at 80℃ until the mother liquor becomes colorless.
Stir for 1 hour. Thereafter, the slurry was filtered, washed, dried, and fired at 300°C to obtain 680 parts of skin-colored iron oxide/titanium dioxide coated sericite. When applied to the skin, the thin plate-shaped processed powder according to the present invention obtained as described above has a mild feeling when used, smooth elongation and spread, and has a thin and close contact, giving a feeling of bare skin. It can exhibit an excellent effect of providing coverage while still having a strong effect. Therefore, it is expected that this product will be used to provide cosmetics with an unprecedented cosmetic finish. Therefore, in order to evaluate cosmetics containing the thin plate-like processed powder according to the present invention, we used the powder foundation of the present invention shown in Example 1 below and the thin plate-like processed powder in Example 1 below as a comparison product. The bodies were made of fine particle titanium oxide (Comparative Example 1), non-pearl mica titanium (Comparative Example 2), cleaved sericite (Comparative Example 3),
Also, using a powder foundation in which cleaved sericite and titanium oxide were replaced with a mixture of the same composition as the thin plate-shaped processed powder (comparison row 4),
A comparative sensory evaluation test was conducted by 10 female panelists. The test method involved having each sample applied to the face with a makeup base applied, and evaluating each evaluation item of elongation/spreadability, adhesion, uniformity, concealment, and makeup finish according to the following evaluation criteria (10 The results (average value) are determined according to the point method)
are shown in Table-1.

[Table] As shown in the results in Table 1, the cosmetic of the present invention has good spreadability and smoothness when applied to the skin, and has good adhesion and concealment properties to the skin. It has been revealed that this product has an excellent property of providing a uniform and thin makeup finish, that is, it has a skin-like feel but has good coverage, and can provide an unprecedented makeup finish. Examples are shown below. Incidentally, the blending ratio is in parts by weight. Example 1 Powder foundation (A) Liquid paraffin 13 Isopropyl myristate 0.5 Sorbitan monooleate 0.3 Dimethylpolysiloxane 3 Fragrance 0.2 Glycerin 1 (B) Yellow iron oxide 2 Bengara 0.8 Ultramarine 0.2 Thin-plate processed cleaved sericite (manufacturing example 1) 40 (TiO ₂ 40% coating, average thickness 0.11μ) Silicone-coated talc 34 Silk powder 4 Titanium mica 1 (Method) After mixing the above B formulation for 2 minutes with a high-speed mixer (Hensiel type mixer), Grind and mix using a grinder. This product is mixed at low speed with the above formulation A in a Henschel mixer at 80°C for 5 minutes, cooled to 20°C, and then press-molded into a medium plate using a press to obtain a product. Example 2 Liquid foundation (A) Liquid paraffin 10 Vaseline 5 Isopropyl myristate 3 Setanol 1 Stearic acid 2 Glycerin monooleate 0.5 POE (25) monostearate 1.5 (B) Yellow iron oxide 1.5 Bengara 0.5 Black iron oxide 0.2 Processed cleaved sericite into a thin plate 15 (TiO ₂ 70% coating, average thickness 0.1μ) Talc 3 (C) Propylene glycol 5 Glycerin 5 Potassium hydroxide 0.2 Ethylparaben 0.2 Fragrance 0.3 Purified water 46.1 (Method) Prescription of A above The mixture is uniformly dissolved and mixed at 75 to 80°C, and the above-mentioned formulation B mixed in a mixer and pulverized is added thereto, and the mixture is stirred and dispersed to obtain a dispersion. To this dispersion, the above-mentioned formulation C is uniformly dissolved and mixed at 75 to 80°C and gradually added with stirring to obtain an emulsified dispersion. This is cooled to 30℃ and made into a product. Example 3 Face powder (A) Yellow iron oxide 1 Bengara 0.4 Ultramarine 0.1 Processed cleaved sericite into a thin plate (Production example 1) 55 Processed cleaved sericite into a thin plate (Production example 2) 30 (Fe ₂ O ₃・TiO ₂ 59 (% coverage, average thickness 0.12μ) Talc 3.0 Nylon powder 2.0 Aluminum stearate 3.5 Titanium mica 0.5 (B) Dimethylpolysiloxane 4 Fragrance 0.5 (Method) The above A formulation was mixed with a high-speed mixer (Henschel type mixer). After mixing for a minute; grind and mix using a grinder. This product is mixed with the formulation B above in a Henschel mixer at low speed for 5 minutes, and then press-molded into a medium plate using a press to obtain a product. Example 4 Sunscreen (A) Liquid paraffin 8 Squalane 5 Vaseline 2 Isopropyl myristate 3 Setanol 1 Stearic acid 2 Glycerin monooleate 0.5 POE (25) Monostearate 1.0 Isopropyl paramethoxycinnamate 1.0 (B) Fine particle titanium oxide 8.0 Laminated processed cleaved sericite 0.5 (TiO ₂ 20% coating, average thickness 0.07μ) Talc 10.0 (C) Propylene glycol 5 Glycerin 5 Potassium hydroxide 0.2 Ethylene paraben 0.2 Fragrance 0.3 Purified water 46.8 POE (25) monostearate 0.5 (Method) The above formulations B and C were mixed and ground in a ball mill for 48 hours. Separately, the formulation of A above is 75
The mixture is uniformly dissolved and mixed at ~80°C, and the pulverized solutions of B and C are uniformly dissolved and mixed at 75-80°C and gradually added thereto with stirring to obtain an emulsified dispersion. This is cooled to 30℃ and made into a product.

Claims (1)

[Claims] 1. Major axis 0.5 to 50μ, minor axis 0.2 to 30μ, thickness 0.005 to
Cleaved thin plate-like inorganic powder in the range of 0.1μ (however,
1. A cosmetic comprising a thin plate-like processed powder whose surface is coated with titanium dioxide and/or iron oxide (excluding titanium dioxide). 2. The cosmetic according to claim 1, wherein the cleaved thin plate-like inorganic powder is cleaved sericite. 3. The cosmetic according to claim 1, wherein the coverage of titanium dioxide and/or iron oxide is 1 to 80% by weight based on the entire thin plate-shaped processed powder. 4. The cosmetic according to claim 1, wherein the amount of the thin plate-shaped processed powder is 0.5 to 85% by weight based on the entire cosmetic. 5. The cosmetic according to claim 1, which is a makeup cosmetic.