JPH0515686B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a cosmetic containing a powder that is plate-shaped and has excellent smoothness and adhesion, and is porous and has excellent air permeability. <Prior art> Conventionally, porous powders used in cosmetics include metal carbonate compounds, combustible substances, etc. coated with silicic acid compounds (Japanese Patent Laid-Open No. 53-15433), and cellulose powder (Japanese Patent Laid-Open No. 15433-1989). 61-189210) are known,
Excellent fragrance retention, moisture retention, and breathability. On the other hand, as the plate-shaped powder, mica is widely used because of its excellent smoothness and adhesion. <Problems to be solved by the invention> Since conventional porous powders are spherical, smoothness,
It had the disadvantage of poor adhesion. Attempts have been made to make porous powder into a plate shape, but sufficient physical strength was not obtained and it was not put to practical use. Furthermore, although plate-shaped powders such as mica have excellent smoothness and adhesion, they lack air permeability, which adversely affects the skin, and also tends to cause makeup to come off. <Means for Solving the Problems> In order to solve the above-mentioned problems, the present inventors conducted intensive studies, fired a dispersed mixture of diatomaceous earth, plate-shaped kaolin, and feldspar, and produced plate-shaped porous (Patent pending, filed on February 26, 1988,
Applicant: Noevir Co., Ltd., Misato Pottery Co., Ltd.).
This powder has both smoothness, adhesion, and breathability, and by incorporating it into cosmetics, the above problems could be solved. <Function> That is, the present invention relates to a cosmetic containing a plate-shaped porous powder prepared by firing a dispersed mixture of diatomaceous earth, plate-shaped kaolin, and feldspar. For the purpose of the present invention, diatomaceous earth, which is a raw material for plate-shaped porous powder, is calcined in advance at 800 to 1200 °C,
Particles of 5 to 20 microns are preferred, which are selected by elutriation classification, which is performed by adding water and pulverizing the particles, followed by classification. Further, the above mixture fired at 900 to 1000°C is used. By processing the starting material, diatomaceous earth, by firing, crushing, and classifying, it becomes easy to obtain particles with the desired particle size, and it also improves the mixing and sinterability of kaolin and feldspar in the next step, and Impurities can be volatilized and removed. In the next step of firing the dispersed mixture of diatomaceous earth, kaolin, and feldspar, fine particles of kaolin adhere as a film to the surface of the porous diatomaceous earth particles and are sintered. At this time, since the feldspar promotes sintering, the strength of the powder is improved. This is crushed and classified again,
Powder particles with a desired particle size range can be obtained. The powder obtained as described above is plate-shaped and porous, has uniform particle size and pore size, and has excellent physical strength. Therefore, it has excellent smoothness, adhesion, and air permeability, and processing such as mixing, crushing, filling, and compression molding when blending into cosmetics does not destroy the porous structure or reduce the particle size. There is no such thing as changing. The amount of the above-mentioned plate-like porous powder can be selected within the range generally used as a powder raw material for cosmetics, but it is usually 1 to 70% by weight, preferably 5 to 30% by weight.
That's about it. The dosage form of the cosmetic according to the present invention includes emulsion, emulsion,
It can be in any form that is normally used as a cosmetic, such as lotion, cream, ointment, stick, powder, press, etc., and can be used for facial, makeup, hair, body, etc. It can be used for anything such as fragrance, but of course foundation,
It is most suitable for make-up cosmetics such as cheek color, eye shadow, white powder, lipstick, and nail enamel. Next, the plate-shaped porous powder to be blended into the cosmetic of the present invention will be described with reference to production examples and comparative production examples. (Production Example 1) Diatomaceous earth is fired at 1000°C for 5 hours in a shuttle kiln. Next, transfer it to a ball mill and convert it into a weight ratio.
Add 70% water, grind for 3 hours, and elutriate to obtain particles with a maximum particle size of 15-20μ. Next, the obtained particles were mixed with 10% kaolin and 0.2% finely ground feldspar by weight, and water was added to make the weight 60%.
To prevent over-grinding, 0.5% carboxymethylcellulose is added as a viscosity modifier, and the mixture is mixed in a ball mill for 1 hour. After this, mix this mixture at 90℃
After drying for 6 hours at 1000℃, it is fired for 5 hours.
This was crushed and classified again to obtain particles with a maximum particle size of 20μ or less. When observed with a scanning electron microscope (Akashi scanning electron microscope ALPHA-10 model), it was confirmed that the powder had a plate-like porous particle structure. Further, as a crush strength test of the powder, the powder according to Production Example 1 was dispersed in Vaseline to form a slurry, and then processed in a Raikai machine for 15 minutes. When the particle structure of the powder after the test was observed using the scanning electron microscope, it was found that the powder was hardly crushed by the above treatment. Chemical composition and particle size distribution of the powder according to Production Example 1,
Lab whiteness, pH, and apparent specific gravity are shown in Table 1. (Production Example 2) Diatomaceous earth is fired at 1100°C for 5 hours in a shuttle kiln. Next, the mixture is transferred to a ball mill, water is added to give a weight ratio of 70%, and after pulverization for 3 hours, the mixture is classified by elutriation to obtain particles with a maximum particle size of 15 to 20 μm. This particle contains 30% kaolin and finely ground feldspar by weight.
Mix 0.4% and add water until 60%.
To prevent over-grinding, 0.5% carboxyvinyl polymer is added as a viscosity modifier and mixed in a ball mill for 1 hour. This mixture is dried at 90°C for 6 hours and calcined at 1000°C for 6 hours. This was crushed and classified again to obtain a powder with a maximum particle size of 20μ or less. As a result of observing this powder with the scanning electron microscope,
A plate-like and porous particle structure was observed. In addition, when the powder according to Production Example 2 was treated with a Raikai machine for 15 minutes and the particle structure was observed using the scanning electron microscope, it was found that even after the above treatment, the powder had a plate-like porous particle structure. was hardly crushed. Chemical composition and particle size distribution of powder according to Production Example 2,
Lab whiteness, pH, and apparent specific gravity are shown in Table 1. (Comparative production example) Diatomaceous earth is fired at 1000°C for 5 hours in a shuttle kiln. When the obtained powder was observed using the scanning electron microscope, it was found to be porous. However, when this was crushed and classified to a maximum particle size of 20μ or less,
No porous structure was lost under the scanning electron microscope.

[Table] <Effects> Further, the effects of the present invention will be explained in detail with reference to Examples. (Example 1) Solid foundation Example 1 Comparative example 1 (% by weight) (1) Titanium oxide 10.0 10.0 (2) Sericite 15.0 30.0 (3) Talc 23.3 33.3 (4) Powder according to Production example 1 25.0 − (5) Red iron oxide 1.0 1.0 (6) Yellow iron oxide 2.0 2.0 (7) Black iron oxide 0.3 0.3 (8) Liquid paraffin 15.0 15.0 (9) Silicone oil 8.0 8.0 (10) Preservative 0.2 0.2 (11) Fragrance 0.2 0.2 100.0 100.0 Manufacturing method The ingredients (1) to (7) are mixed and pulverized, then homogenized, and (8)
Add ~(11) and mix to make it homogeneous. Thereafter, this is filled into a metal plate and press-molded using a compression molding machine. (Example 2) Pour-in type foundation Example 2 Comparative example 2 (% by weight) (1) Titanium oxide 12.0 12.0 (2) Sericite 14.1 32.1 (3) Powder according to Production Example 1 18.0 - (4) Red iron oxide 1.1 1.1 (5) Yellow iron oxide 2.1 2.1 (6) Black iron oxide 0.3 0.3 (7) Liquid paraffin 30.0 30.0 (8) Vaseline 10.0 10.0 (9) Silicone oil 5.0 5.0 (10) Microcrystalline wax 7.0 7.0 (11) Preservative Agent 0.2 0.2 (12) Fragrance 0.2 0.2 100.0 100.0 Production method (1) to (6) were mixed and pulverized and homogenized, and this was added to (7) to (11) that had been mixed in advance and dissolved by heating, and the mixture was stirred and homogenized. Add the remainder (12) and pour into the designated container. (Example 3) Emulsified foundation Example 3 Comparative example 3 (% by weight) (1) Titanium oxide 1.90 1.90 (2) Talc 1.12 6.12 (3) Powder according to Production Example 2 9.00 - (4) Red iron 0.15 0.15 (5) Yellow iron oxide 0.27 0.27 (6) Black iron oxide 0.06 0.06 (7) Kaolin 6.00 10.00 (8) Ceresin 3.50 3.50 (9) Paraffin wax 1.50 1.50 (10) Liquid lanolin 1.50 1.50 (11) Liquid paraffin 13.5 0 13.50 (12)POE(20) 1.00 1.00 Sorbitan monooleate (13) Sorbitan monooleate 1.00 1.00 (14) Glyceryl monostearate
0.70 0.70 (15) Purified water 55.20 55.20 (16) Carboxymethylcellulose
0.40 0.40 (17) Propylene glycol 3.00 3.00 (18) Preservative 0.10 0.10 (19) Fragrance 0.10 0.10 100.00 100.00 Production method (1) to (7) were mixed and ground, homogenized, and this was mixed in advance and heated (12) Add to (18) and homogenize with a homomixer. Thereafter, (8) to (11), which have been mixed in advance and homogenized by heating, are gradually added thereto, and the mixture is stirred and emulsified using a homomixer. After cooling, (18) is added. (Example 4) Solid powder eyeshadow Example 4 Comparative example 4 (% by weight) (1) Titanium oxide 3.00 3.00 (2) Mica 15.00 35.00 (3) Powder according to Production Example 2 30.00− (4) Talc 18.00 28.00 (5) Kaolin 6.00 6.00 (6) Yellow iron oxide 3.60 3.60 (7) Black iron oxide 4.00 4.00 (8) Gunjiyo 14.30 14.30 (9) Squalane 6.00 6.00 (10) Preservative 0.05 0.05 (11) Fragrance 0.05 0.05 100 .00 100.00 Manufacturing Methods (1) to (8) are mixed and pulverized and homogenized, and (9) to (11) are added thereto and mixed and homogenized. Thereafter, this is filled into a metal plate and press-molded using a compression molding machine. A sensory evaluation test and a gas permeability test were conducted on the above Examples and Comparative Examples. The sensory evaluation test was conducted on a panel of 30 women using a five-point evaluation method on three items: spreadability, adhesion, and makeup durability. The results are shown in Table 2.

[Table] As shown in the table above, the examples of the present invention were rated higher than the comparative examples in terms of spreadability, adhesion, and makeup durability. Next, a gas permeability test was conducted as follows.
The sample was applied to a 16 cm ² area on the human forearm, a gas collector was placed in close contact with the sample, and the inside was replaced with nitrogen gas.
The pressure was set to 0.5 Kg/cm ² and the mixture was allowed to stand for 2 hours.
Thereafter, the collected gas was analyzed by gas chromatography to measure the carbon dioxide concentration. The gas permeability of each Example and each Comparative Example was calculated by setting the gas concentration of the sample-unapplied area to 100. This measurement was performed on a panel of 10 people, and the average values are shown in Table 3.

【table】

[Table] As is clear from the above table, the examples of the present invention had higher gas permeability and superior air permeability than the comparative examples. As described above, in the present invention, by using a plate-shaped and porous powder, there is no need to use porous powder and plate-shaped powder together as in the past.
It was possible to provide a cosmetic with excellent smoothness, adhesion, and breathability. In addition, the plate-shaped porous powder used in the present invention can be crushed and mixed using a Raikai machine, etc.
Since the porous structure is not impaired, when it is blended into cosmetics, it can provide sufficient air permeability.

Claims (1)

[Scope of Claims] 1. A cosmetic comprising diatomaceous earth mixed with a plate-shaped porous powder obtained by sintering plate-shaped crystals of kaolin and feldspar. 2. Claim 1, characterized in that the amount of the plate-shaped porous powder made by sintering diatomaceous earth with plate-shaped crystals of kaolin and feldspar is 1 to 70% by weight.
Cosmetics listed in section.