JPS6339565B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to cosmetics such as oil-based or emulsifying foundations, lipsticks, hand creams, aftershave creams, and eye shadows. It has been well known that fine powders such as talc, kaolin, titanium oxide, microcrystalline cellulose, and starch are incorporated into cosmetics for the purpose of improving spreadability and smoothness when applied to the skin. However, the various powders mentioned above generally have an irregular shape, and when cosmetics containing such powders are rubbed onto the skin, the frictional resistance of the powders is extremely large, so it is difficult to find a product that is sufficiently smooth and spreadable. It was difficult to obtain a light feel. In addition, in order to provide cosmetics with the refreshing feeling that has been desired in recent years, the use of low-viscosity oil components is being considered, but this is not sufficient due to the high frictional resistance of the powder blended. Currently, it is not possible to obtain a silky smooth feel. Furthermore, in place of the amorphous powder described above, the use of fine spherical silica gel in cosmetics is disclosed in US Patent No.
4000317, this lotion is a colloidal suspension of silica gel with a particle size of 20 mμ or less for the purpose of absorbing sebum and sweat, and the silica gel has hygroscopicity and drying properties. If used repeatedly, the surface of the skin becomes excessively dry and flaky, which is not favorable from the viewpoint of skin physiology, and there are also problems such as poor flexibility and moisturizing properties when applied to the skin. The present invention has been developed in view of the above circumstances, and it is possible to obtain a sufficiently smooth and light feel when rubbed on the skin, as well as not having a feeling of dryness, but also a moderately refreshing feeling. The purpose of the present invention is to provide a cosmetic that has good affinity with the skin and can provide a soft and moist feel. That is, the cosmetic of the present invention is a powder obtained by coating spherical silica gel with a particle size of 1 to 30 μm with metal soap, and in which the composition ratio of the silica gel to metal soap is 99:1 to 70:30. It is characterized by containing a body. The compositional formula of the spherical silica gel used in the present invention is
It is a porous or non-porous material represented by SiO ₂ .nH ₂ O, and not only natural products but also dry and wet synthetic products can be used. In addition, the composition formula SiO ₂・nH ₂ O
not only refers to those that inherently contain bound water, but also includes those in which silicon dioxide instantly adsorbs water during naturalization, and is a general compositional formula for these. Furthermore, in the present invention, spherical shape is defined to include not only true spherical shape but also shapes similar to spheres, and particles having a particle size of 1 to 30 μm, preferably 5 to 15 μm are used. This is because if it is less than 1μ, it cannot be expected to spread smoothly on the skin by utilizing its rolling effect, and if it exceeds 30μ, it will give a rough feel, which is undesirable. Next, the metal soap for coating the silica gel as described above is a compound represented by the general formula (RCOO)nM (where R is an aliphatic or cyclic hydrocarbon group having 6 to 8 or more carbon atoms, and M is an alkali Among metals other than metals (n indicates the valence of the metal), those with excellent dispersibility, lubricity, flexibility, adhesion, and high safety are preferred, such as aluminum stearate, magnesium stearate,
Powdered ones such as zinc stearate or waxed ones can be mentioned. Coating with metal soap is not limited to coating the silica gel surface completely and with a uniform thickness; it is sufficient to completely coat the surface of the silica gel even if the thickness is uneven; It is necessary to be in close contact with Furthermore, the composition ratio of silica gel and metal soap constituting the powder is 99:1 to 70:30. If the amount of metal soap is more than this range, the characteristics of metal soap will appear as they are, and even if it is mixed into a cosmetic base material, the rolling effect will be extremely reduced, and the feel on the skin will not be smooth, or it will not be extremely smooth. If the amount increases, the silica gel and the metal soap will separate and no rolling effect will occur. On the other hand, if the amount of metal soap is less than the above range, the properties of the silica gel alone will appear as they are, and the effects of the present invention cannot be expected. Furthermore, the above-mentioned powder is included in the cosmetic composition in an amount of 3 to 45%, preferably 5 to 35%, based on the total weight. Particularly in oil-based or emulsifying cosmetics, if the amount of powder blended is less than 3%, it is difficult to obtain a rolling effect, and if it exceeds 40%, the system will become excessively gelled, which is undesirable. The powder used in the cosmetics used in the present invention can be produced by various methods, but for example, hexane, octane, toluene,
One or more types of chlorine-based solvents or hydrocarbon-based solvents that are soluble in metal soap such as chloroform are mixed in a weight ratio of 1:2 to 1:200, dissolved under heating, stirred and immersed, A preferred method is to distill off the solvent, then wash with a solvent such as ethanol, and dry. Next, an example of manufacturing the powder used in the cosmetic of the present invention will be shown.

[Production example 1] Add 95 g of a mixture of spherical silica gels with particle sizes of 5 to 15 μm to 500 ml of toluene and heat at 60°C.
3 g of aluminum stearate was added little by little with gentle stirring. The mixture was heated and stirred for 30 minutes, and the solvent was distilled off under reduced pressure (3 mmHg). Next, while maintaining the temperature at 15-20°C, add 300 ml of ethanol, stir for 20 minutes, and filter. After repeating this operation three times, it was washed and dried under reduced pressure at 60° C. to obtain approximately 100 g of aluminum stearate coated powder (particle size: approximately 5 to 15 μm).

[Production Example 2] Add 95g of a mixture of spherical silica gels with particle sizes of 1 to 10μ to 1000ml of hexane and heat at 50°C.
5 g of zinc stearate was added little by little with gentle stirring, continued heating and stirring for 30 minutes, and distilled off the solvent at a distillation temperature of 80°C. Next,
While maintaining the temperature at 15-20°C, add 500 ml of ethanol, stir for 30 minutes, and filter. After repeating this operation twice, it was washed and dried under reduced pressure at 60°C to form a powder coated with zinc stearate (particle size: approx.
~10μ) Almost 100g was obtained.

[Production Example 3] Add 93g of a mixture of spherical silica gel of different diameters with a particle size of 10 to 20μ to 1000ml of a hexane-chloroform mixture (1:1), heat it to 50℃, and add palmitic acid while stirring gently. 7g zinc
was added little by little, heated and stirred for 40 minutes, and the solvent was distilled off at a distillation temperature of 80°C. At 15-20℃
Add 700 ml of ethanol while keeping the temperature at 40
Stir for a minute and filter. After repeating this operation three times, the powder was washed and dried under reduced pressure at 50°C to form a powder coated with zinc palmitate (particle size approx.
20μ) Almost 100g was obtained.

[Production Example 4] Add 90g of a mixture of spherical silica gels with particle sizes of 1 to 25μ to 2000ml of a toluene-octane mixture (2:1), heat to 70°C, and add zinc laurate while stirring gently. 5g and zinc oleate 5g
were added little by little, heating and stirring were continued for 60 minutes, and the solvent was distilled off under reduced pressure (3 mmHg, distillation temperature 70°C). Next, while maintaining the temperature at 15-20°C, add 1000 ml of ethanol, stir for 60 minutes, and filter.
After repeating this operation twice, the powder was washed and dried under reduced pressure at 70°C and coated with a zinc laurate-zinc oleate mixture (particle size of about 1 to 25μ).
I got almost 100g. The powder obtained in this way is coated with a thin film of metal soap on the surface of the spherical silica gel, completely covering the surface of the silica gel and adhering to it, forming a single body that can be used in both aqueous and non-aqueous systems. It also behaves without separation. In addition, while silica gel itself is normally very easy to scatter, the powder used in the present invention has no scattering properties and has good dispersibility, so it has good filling properties and
It is also excellent in productivity. Here, the measurement results of the apparent density, specific surface area by gas phase adsorption method, and electron micrographs of silica gel alone, a mixture of silica gel alone and metal soap, and the powder used in the present invention are shown in Figures 1 and 2.
and FIG. 3, respectively. To measure the apparent density, 32 g of each sample with a particle size of approximately 1 to 15 μm is poured into a sample tube (a cylindrical container with a diameter of 2 cm and a length of 30 cm) with a volume scale under certain conditions, and this is measured using an electric apparent volume measurement method. Set the sample tube in a container (manufactured by Ohka Kogyo Co., Ltd.) and drop the sample tube continuously within a height of 1.5 cm at a rate of 30 drops per minute to measure the change in the filling volume of each sample. I asked for it. To measure the specific surface area, put 0.5 g of the sample into the sample tube for the adsorption measurement device (V-shaped side flask, volume 2 ml) and use the adsorption measurement device (ADS-IB type, manufactured by Shimadzu Corporation).
A mixture of nitrogen and helium gas (PN2 = 0.3) is flowed through the tube, and the sample is cooled with liquid nitrogen. When equilibrium is reached, the sample is adsorbed with nitrogen gas in the mixture, and the liquid nitrogen is removed from the sample tube. The adsorbed nitrogen gas is desorbed by increasing the temperature of the sample, and the change in nitrogen gas concentration during this adsorption and desorption process is measured using a thermal conduction type gas chromatograph (GC-6AM, manufactured by Shimadzu Corporation). It was determined by measuring with a detector. In addition, the electron micrographs were taken using a scanning electron microscope (Hitachi-Akashi MINI-
SEM, MSM-4 type), each with a diameter of approximately
A 10 μ sample was photographed at a magnification of 5000 times. Figure 3 (X) shows silica gel alone, Figure 3 (Y) shows spherical silica gel coated with metal soap, and their composition ratio is 93:7. FIG. 3Z shows a powder obtained by coating spherical silica gel with metal soap and having a composition ratio of 90:10. According to Figure 1, the apparent density after 900 drops is 0.775 for the sample made of silica gel alone (a), and the apparent density for the sample made of silica gel and aluminum stearate mixed at a ratio of 95:5 and 90:10 (b). ，
In (c), they are 0.755 and 0.710, whereas those obtained by coating silica gel with aluminum stearate and whose composition ratios are 99:1 and 95:1, respectively.
The apparent densities of samples (d), (e), and (f), which have a ratio of 5,90:10, are 0.670, 0.630, and 0.580, respectively.
The apparent densities of (d), (e), and (f) are for samples (a) and (b),
It is smaller than the apparent density of (c). From these things, the sample
Samples (d), (e), and (f) have a surface layer that is thicker by the amount of aluminum stearate coated on the silica gel surface, and have a completely different structure from samples (d) and (e). It can be seen that it has. Furthermore, according to FIG. 2, the specific surface area of sample (a) made of silica gel alone is 224.5 m ² /g, while that of sample (a) obtained by coating silica gel with aluminum stearate and their composition ratio is The specific surface areas of samples (b), (c), (d), (e), and (f), which are 99:1, 97:3, 95:5, 93:7, and 90:10, respectively, are (a ) is smaller than From this, it can be inferred that the metal soap covers the pores of the silica gel as well as the slight depressions on the surface. However, the specific surface area of sample (f) is larger than that of samples (c), (d), and (e), which is presumed to be due to damage to the coated surface. Therefore,
The composition ratio of silica gel and metal soap is 97:3 ~
It can be said that the range of 93:7 is optimal. Next, examples of the present invention will be shown. Incidentally, the blending ratio is in parts by weight. Example 1 Static foundation A Ingredients Carnauba wax 5.0 Bacyl alcohol 1.5 Ceresin 1.5 Vaseline 15.0 Liquid paraffin 35.0 Colored pigment paste White pigment paste 16.5 B Ingredient sericite (muscovite) 5.0 Powder obtained in Production Example 1 20.0 Fragrance 0.5 Heat ingredient A to 80°C or above, add ingredient B little by little while stirring to disperse well, and add ingredient B while stirring.
Allow to cool to 70°C, add fragrance, maintain at 65°C (±5°C), pour directly into a storage container, and leave to cool at room temperature to obtain the product. Example 2 Oil-based compact foundation A Ingredients Carnauba wax 2.0 Behenyl alcohol 9.0 Solid paraffin 3.5 Setanol 4.0 Lanolin 7.0 Liquid paraffin 6.0 Activator 2.0 Color pigment paste 26.5 B Ingredient talc 10.0 Powder obtained according to Production Example 4 30.0 Fragrance 0.5 Heat component A to 85℃ or higher, and then heat to 65℃ while stirring.
Component B is added little by little and dispersed well. Next, the fragrance is added and the temperature is maintained at 65°C (±5°C), and the mixture is poured directly into a medium dish container and left to cool at room temperature to obtain a product. Example 3 Emulsified type foundation A Ingredients Beeswax 2.0 Stearic acid 2.5 Liquid paraffin 15.0 Activator 6.0 Lanolin 6.0 Colored pigment paste White pigment paste 17.0 B Ingredient Triethanolamine 1.0 Glycerin 5.0 Distilled water 39.0 Obtained according to Production Example 3 Powder 10.0 Fragrance 0.5 Heat component A to 85℃ or higher, add the powder little by little while stirring to disperse well, then gradually add component B, which has been heated to 87℃ or higher, to emulsify. The mixture is left to cool while stirring, and when the temperature reaches 55 to 60°C, fragrance is added and further stirred until the temperature reaches 40°C to obtain a product. 〓Example 4〓 Kneaded lipstick A Ingredients Beeswax 6.0 Stearic acid 8.0 Setanol 5.0 Vaseline 8.0 Titanium oxide 12.5 B Ingredient Talc 35.0 Powder obtained in Production Example 2 25.0 Fragrance 0.5 Ingredient A was heated to 90°C and stirred. While stirring, add component B little by little and disperse well. Leave to cool while stirring. When the temperature is 60℃, add the fragrance and heat to 65℃ (±5
℃), pour directly into a lipstick container and leave to cool to 40℃ to obtain the product. 〓Example 5〓 Liquid Eyeshadow A Component Carnauba Wax 5.0 Liquid Paraffin 5.0 IPM 5.0 Stearic Acid 5.0 Activator 5.0 Colored Pigment Paste 17.0 B Component Titanium Oxide 10.0 Powder Obtained in Production Example 1 5.0 C Component Triethanolamine 0.5 Propylene Glycol 5.0 Distilled water 37.0 Fragrance 0.5 Ingredient A is heated to 85°C or higher, and while stirring, add ingredient B little by little and disperse well. Next, gradually add ingredient C, which has been heated, to emulsify it, and continue stirring while stirring. Leave to cool and add fragrance when the temperature reaches 55-60°C and continue stirring until the temperature reaches 40°C to obtain a product. 〓Example 6〓 Hand cream A Ingredients Stearic acid 15.0 Setanol 4.0 Lanolin 2.0 Butyl stearate 2.0 Powder obtained in Production Example 2 10.0 Preservative 0.05 B Ingredient activator 3.0 Propylene glycol 5.0 Distilled water 58.55 Fragrance 0.5 Ingredient A Heat to 80°C or higher, then heat to 82°C while stirring.
Gradually add the heated component B to emulsify it, leave it to cool while stirring, add the fragrance when the temperature is 60℃, continue stirring until it reaches 40℃, and then leave it at room temperature to obtain the product. . 〓Example 7〓 Aftershave Cream A Ingredients Lanolin 1.0 Squalene 3.0 Liquid paraffin 3.0 Stearic acid 8.5 Cetanols 4.0 Sperm wax 4.0 Paraffin wax 2.0 Active agent 4.0 Preservative 0.2 L-menthol 0.05 Powder obtained according to Production Example 2 4.0 Ingredient B Borax 0.5 Propylene Glycol 5.0 Distilled Water 60.25 Fragrance 0.5 Ingredient A was heated to 80°C or higher and heated to 82°C while stirring.
Gradually add the heated component B to emulsify it, leave it to cool while stirring, add the fragrance when the temperature is 60-65℃, continue stirring until it reaches 43℃, then leave it at room temperature to decompose it. Get foamy product. Next, FIG. 4 shows the results of a sensory profile conducted on five expert panelists regarding the present invention product and the control product in the form of stick foundations. Note that (A) was prepared using the powder obtained in Production Example 1 (particle size 5 to 15μ) in Example 1.
(B) is a conventional stick-like foundation manufactured by adding sericite instead of powder in the formulation of (A); (C) is the formulation of (A) In place of the powder, squalane (20
Part) A stick-like foundation manufactured by blending an adsorbent, (D) is manufactured by the powdering method disclosed in JP-A-53-38635 in place of powder in the formulation of (A). This shows a stick-like foundation manufactured by blending the ultrafine powder silica adsorbed with metal soap (aluminum stearate).The evaluation method is to use the stick-like foundation of (B) as a base point of 0. And so. As seen in the sensory profile results in Figure 4, the stake-like foundation according to the present invention
Compared to the control product (B), (A) spreads lightly during use, does not feel oily during use, has a glossy and transparent feel after use, and is not sticky after use. Excellent in all evaluations. In addition, in comparison with control products (C) and (D), these were inferior to the present invention, such as hardness at the beginning of use, heavy elongation during use, and lack of luster and transparency after use. In contrast, (a) obtained extremely good results. In particular, in terms of gloss during use, the product of the present invention exhibits the rolling effect of the powder contained therein, resulting in a remarkable effect. In addition, control products (C) and (D) are rated as having no oily feel during use or stickiness after use, but these products actually appear powdery and dry on the skin. It gave a feeling of stickiness, and showed rather bad properties. As described above, the present invention maintains the advantages of conventional foundations while providing unprecedented effects, namely, it spreads lightly and smoothly on the skin, and there is no stickiness or oiliness after use.
Furthermore, the present invention provides a cosmetic that can adjust the dryness as desired by adjusting the blending ratio of powder, has appropriate flexibility, and has excellent moisturizing properties. In addition, the following table shows 80 women aged 18-40 (18-25
Ages: 26-30 years: 31-40 years old = composition ratio of 1:2:1) Use various stucco foundations listed below every day for 20 days, 2 to 3 hours after each application. This shows the evaluation of

[Table] In the table, Cosmetic A is the formulation of the stick-shaped foundation of Example 1 in which the powder is replaced with granular silica gel alone, and Cosmetic B is the formulation of the stick-shaped foundation of Example 1. In the formulation of the foundation, the powder was replaced with powder in which the composition ratio of granular silica gel and metal soap was 99.5:0.5, and Cosmetic C was the same as the stick-shaped foundation of Example 1. D is obtained by replacing the powder in the formulation of the stick-like foundation of Example 1 with a powder having a composition ratio of granular silica gel and metal soap of 90:10. The evaluation shown in this table was carried out in the winter season, and almost all of the cosmetics C and D, which are cosmetics of the present invention, did not complain of skin abnormalities, whereas the cosmetics A, which contains granular silica gel alone, and the metal soap Regarding B, which contained powder with insufficient coating, many people complained of dry skin.
Incidentally, in D, which used a powder excessively coated with metal soap, all the patients were able to eliminate the dry feeling, but at the same time, it was confirmed that it was difficult to spread on the skin. In addition, when we conducted a survey on the feeling of use on the same subjects as in the above evaluation test, almost all of them commented on the smooth and refreshing feeling, the natural feel of bare skin, the transparency after applying it to the skin, and the feeling of makeup. The foundation was praised for having new properties that did not exist before, such as the ability to freely adjust the finish to be thin or thick. Further, the oil-based compact foundation shown in Example 2 and the oil-based compact foundation from which the powder was removed were heated at 5°C, 20°C and 40°C.
When left at ℃ for 3 months, the target product showed a significant decrease in block strength and sweating phenomenon, whereas the cosmetic of Example 2 showed no change and had excellent temperature resistance. It was confirmed that Furthermore, an animal dermal test was conducted using the stick-shaped foundation shown in Example 1 on 6 rabbits, and the test was carried out four times on the 1st, 2nd, 3rd, and 4th days. After repeated evaluations, the results showed no abnormalities and proved to be highly safe. The present invention is particularly applicable to, for example, stick-shaped foundations, cream compact foundations,
It exhibits its full effect when applied to oil-based cosmetics such as powdered lipsticks, as well as emulsifying cosmetics such as emulsified foundations, hand creams, aftershave creams, and liquid eye shadows. Of course, similar effects can be expected with other cosmetics. As described above, the cosmetic of the present invention contains powder in which the surface of granular silica gel is covered with a metal soap film having an appropriate thickness, so it has an extremely smooth application property on the skin and spreads easily. Not only is it light, but it also has good affinity with the skin and provides a moist feel, prevents excessive dryness on the skin surface after application, has excellent flexibility and moisturizing properties, and at the same time leaves a refreshing feeling. You can also feel it.

[Brief explanation of the drawing]

Figure 1 shows the relationship between the number of falls and the apparent density when the powder used in the invention and a comparative product are measured using an electric apparent volume measuring device, and Figure 2 shows the relationship between the powder used in the invention and the comparative product. A diagram of the relationship between the specific surface area and the coating amount of aluminum stearate when the specific surface area was measured by the gas phase adsorption method. Figure 3 is an electron micrograph of the powder used in the present invention and a comparative product. Figure 4 is the graph of the book. The sensory profile of an example of the invention is shown together with a comparative product.

Claims (1)

[Scope of Claims] 1. Obtained by coating spherical silica gel with a particle size of 1 to 30 μm with metal soap, and the composition ratio of the silica gel and metal soap is 99:1 to 70:
A cosmetic characterized by containing powder having a content of 30%. 2. The cosmetic according to claim 1, wherein the cosmetic is oil-based or emulsifiable.