JPS60228406A - Cosmetic - Google Patents

Abstract

PURPOSE:To provide a cosmetic wherein the excessive luster is suppressed and the excellent characteristics of an extender pigment is maintained, by compounding a pigment coated with an inorganic silicon compound to suppress the unnatural luster of extender pigment. CONSTITUTION:The surface of a pigment, especially an extender pigment used in makeup cosmetics, is coated with one or more kinds of inorganic silicon compounds, especially silicon dioxide and/or a silicate compound, and the coated pigment is compounded to a cosmetic, especially a makeup cosmetic such as foundation, etc. It is not necessary to adjust the amount of the extender pigment for attaining desired luster, and accordingly, excellent characteristics of extender pigment such as transparency, fluidity, spreadability on the skin, adhesivity to the skin, etc. can be fully demonstrated, and a cosmetic having uniform and controlled luster, high safety, and excellent feeling and physical properties can be obtained. The weight ratio of the pigment to the silicon compound is about 99:1-50:50, especially 98:2-70:30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel cosmetic that takes advantage of the excellent properties of extender pigments such as transparency, fluidity, smooth spread on the skin, and adhesive strength, and The present invention provides a cosmetic, especially a makeup cosmetic, which has a novel effect of suppressing excessive gloss.

Extender pigments usually incorporated into makeup cosmetics are often in the form of thin plates, and therefore often have a more or less unique luster. The intensity of this luster is unique depending on conditions such as the type of extender pigment, the origin of the raw stone, the manufacturing method, and the particle size distribution.

On the other hand, make-up cosmetics are required to have various glosses, especially gloss strength, due to their cosmetic properties. an extender pigment that has no luster;
The glossiness of the entire system has been adjusted by appropriately combining extender pigments with strong luster such as mica and sericite and adjusting their blending amounts.

However, if a large amount of extender pigments with strong luster are used, when applied to the skin, the appearance will be shiny or shiny.
There was a tendency to give an unnatural shine. In order to solve this problem, the amount of glossy extender pigments had to be kept to a low level. At present, it has not been possible to fully demonstrate excellent properties such as adhesion.

Therefore, in view of the current situation, the present inventors conducted intensive research to develop a useful powder, and found that by coating the surface of a pigment with one or more types of inorganic silicon compounds, the physical properties of the pigment could be improved. The unnatural gloss that pigments have can be reduced, thereby making it possible to obtain the desired gloss for each cosmetic without requiring the conventional adjustment of the amount of extender pigments. They also discovered that the coated pigment thus obtained has the excellent properties of the pigment before coating, such as transparency, fluidity, smooth spread on the skin, and adhesive strength, It took a while to complete the invention.

The present invention provides cosmetics based on this knowledge.

The present invention relates to a cosmetic composition containing one or more coated pigments whose surfaces are coated with one or more inorganic silicon compounds.

The pigments used in the present invention may be pigments that can be used in ordinary cosmetics, such as talc, kaolin, mica, sericite, titanium oxide-coated bismuth oxychloride, titanium oxide-coated mica, bismuth oxychloride, and silk powder. , these are used singly or in combination of two or more. The pigments used in the present invention also include powders coated with metal oxides, metal salts, etc. in a proportion of 10% by weight or less based on the pigment. Examples of such pigments include yellow iron oxide-coated mica, yellow iron oxide-coated talc, Bengara-coated mica, Bengara-coated sericite, iron-free iron oxide-coated mica, iron-free iron oxide-coated kaolin, and the like.

In addition, in the present invention, these pigments have an average particle diameter of 1
Those in the range of μ to 50 μ are preferably used.

If the average particle diameter exceeds 50 μm, it tends to give a strange feeling when used in cosmetics, and if it is less than 1 μm, the transparency and fluidity deteriorate, which is not preferable.

Next, examples of the inorganic silicon compound which is the coating substance applied to the coated pigment of the present invention include silicic acid, silicon dioxide, aluminum silicate, magnesium silicate, calcium silicate, magnesium aluminum silicate, calcium aluminum silicate, etc. -Dan, two or more types, or a mixture. There are various methods for coating the pigment surface with these inorganic silicon compounds.
For example, the following three methods are available.

1. 0.2 to 3.5 parts of inorganic silicon compound fine powder and pigment 1
A coated pigment is obtained by mixing and pulverizing 0 part of the pigment in a wet or dry manner and coating the surface of the pigment with an inorganic silicon compound through a mechanochemical reaction. In this case, the inorganic silicon compound serving as the coating material is preferably a fine powder with an average particle diameter of 1 μm or less.

When the average particle diameter is larger than 1 μm, it is difficult to obtain a uniform coated surface, and secondary particles are likely to increase.

2 10 parts of pigment and 0.0 parts of sodium silicate, potassium silicate, etc.
Uniformly dispersed in an aqueous solution containing 2 to 3.5 parts and heated to 70°C.
The alkaline mixture is heated to ~95°C, preferably 85°C to 90°C, and the pH of the alkaline mixture is adjusted to 7-11, preferably 9-10 using mineral acid, preferably dilute hydrochloric acid, dilute sulfuric acid, etc., and stirred. continue. Further, neutralize until the pH is around 7, then filter, wash and dry, and if necessary, 200℃ to 5℃.
A method of obtaining a silicon dioxide-coated pigment by sintering at 00°C.

A method of obtaining a coated pigment in which the surface of the pigment is coated with a silicate compound by using an aqueous solution of a metal salt such as aluminum sulfate, magnesylano-3 chloride, or zinc sulfate instead of using a mineral acid during the pH adjustment.

3. Uniformly disperse 10 parts of the pigment in an alcohol solution in which 0.2 to 40 parts of an organic silicon compound, such as ethyl silicate or dichloroethyl silicate, is dissolved in an alcohol such as methanol or ethanol, and heat the mixture at 20°C to 60°C. At a temperature range of , add the alkaline hydrous alcohol and continue stirring. Thereafter, the method is followed by filtration, washing, drying, and optionally sintering at 200°C to 500°C to obtain a coated pigment coated with silicon dioxide.

The coated pigment used in the present invention can be produced by the method described above, and in the coated pigment obtained, the composition ratio of the pigment and the inorganic silicon compound that is the coating substance can be adjusted arbitrarily depending on the desired gloss. Although selected, the weight ratio is approximately 99
:1 to 50:50, preferably 98:2 to 70:30.

If the ratio of the coating material to the pigment is less than the above ratio, the gloss adjustment effect will be insufficient, and if the ratio of the coating material to the pigment is more than the above ratio, it will be difficult to achieve a uniform coating, resulting in the formation of secondary particles and Problems such as caking tend to occur, and this method is not suitable for the present invention.

The coated pigment used in the present invention can be widely used in cosmetics using pigments, and the cosmetics obtained by the present invention include makeup cosmetics such as foundation, powder powder, solid powder, red bean paste, and eye shadow. To provide a cosmetic that has excellent uniformity and controlled gloss, is highly safe, has an excellent feeling of use, and has excellent physical properties. It can be blended into cosmetics in the same manner as conventional pigments, and the blending amount is arbitrarily selected depending on the properties of the cosmetic, but is 5% to 90% of the total weight of the cosmetic ingredients. This is a minimum of 5% in order to take advantage of the excellent properties of pigments, such as transparency, fluidity, smooth spread on the skin, and adhesion, and to adjust the gloss of the applied cosmetics. This is because the above combination is required. The upper limit is not particularly limited, but it is preferably about 90%, considering the addition of colorants, oils, fragrances, etc.

Next, an example of manufacturing the coated pigment used in the present invention will be shown.

Production Example-1 10 parts of talc with an average particle size of 20μ is stirred and mixed into 100 parts of an aqueous solution containing 1 part of sodium orthosilicate to uniformly disperse it, and 0.1N diluted hydrochloric acid is added dropwise to this at 85°C. The pH was adjusted to 9-10 and stirring was continued. After this, dilute hydrochloric acid was further added dropwise to neutralize until the pH reached 7, and then this was filtered.The obtained powder was washed with an appropriate amount of water and filtered for 3 times.
The mixture was repeatedly dried under hot air at 50° C. for 24 hours, and then pulverized using a Henschel type mixer to obtain 10.2 parts of silicon dioxide-coated talc.

Production Example-2 Using the same technical operation as Production Example-1, an average particle size of 20
10.2 parts of silicon dioxide-coated mica was obtained by using mica having an average particle size of 30 μm instead of talc μ.

Production Example-3 10 parts of sericite with an average particle diameter of 20 μm was added to 100 parts of an ethanol solution containing 3.5 parts of ethyl orthosilicate, the pH was adjusted to about 10, and stirring was continued.

Next, the powder obtained by filtration was washed with an appropriate amount of 50% aqueous ethanol, the filtration process was repeated three times, and the powder was dried for 24 hours under hot air at 50°C. Thereafter, it was pulverized with a Henschel type mixer to form silicon dioxide. 10.6 parts of coated sericite were obtained.

Production Example-4 Using the same technical operation as Production Example-3, an average particle size of 20
Using kaolin with an average particle size of 10 μ instead of μ sericite. From K, silicon dioxide-coated kaolin io, 5
I got the department.

Production example-5 Merck io part with average particle size 20μ, average particle size 0601
A slurry consisting of 2 parts of μ aluminum/magnesium silicate, 6 parts of ethanol, and 24 parts of water was prepared in a ball mill.
Mixed and pulverized for 4 hours, then filtered, the resulting powder was washed with an appropriate amount of water, filtered three times, dried for 24 hours under warm air at 50°C, and then placed in a Henschel type mixer. The mixture was ground to obtain 11°4 parts of aluminum/magnesium silicate coated talc.

Production Example-6 Using the same technical operation as Production Example-5, the average particle size was 20μ.
By using mica having an average particle size of 30 μm instead of talc, 11.6 parts of aluminum/magnesium silicate coated mica was obtained.

Next, examples of the cosmetics of the present invention will be shown.

Example-1 Cream foundations A and B were each heated to 80°C, B was gradually added to A, mixed and emulsified in an emulsifying pot, and then mixed while continuing to stir.
Cool to 0°C and fill into containers to make the product.

Example-2 Cake-like foundation (a) B Liquid paraffin Press into a mold to form a product.

Example 3 Cake-like foundation (b) B Fluid ballast 7 & 5 A product was obtained in the same manner as in Example 2.

Example-4 Finishing powder B Liquid paraffin 3. OA is mixed in a Herschel type mixer, pulverized in a hammer mill, B is added and mixed in a Herschel type mixer, processed by a blower sifter, and filled into a container to form a product.

The coated pigment of the present invention has excellent properties not found in conventional pigments, and does not give an unnatural gloss when used in cosmetics, and also has transparency, fluidity, and smoothness on the skin. growth,
It also has excellent properties such as adhesive strength, making it an excellent powder for cosmetics.

Furthermore, by freely selecting the types and coating ratios of extender pigments and coating substances such as silicon dioxide and silicate compounds, it is possible to obtain powders with desirable luster and physical properties, which can be used as powders for cosmetics. It can be widely used as a body.

Next, in order to examine the gloss of the coated pigment used in the present invention, the light reflectance was measured for the extender pigment before coating and the processed powder after coating, and the results are shown in Table IK. The higher the reflectance, the higher the gloss. The test method is as follows.

Gloss test: Microcrystalline wax was uniformly coated on cowhide, and the sample powder was spread evenly on this with a horsehair brush, and the light reflectance was measured.

The measurement was performed by measuring reflected light at 75° using GRO8S METER manufactured by Nippon Denshoku Industries.

Table 1 As described above, the coated pigment used in the present invention has a lower light reflectance than the pigment that is the inner core substance, that is, its gloss is suppressed, and when applied to the skin, it does not have a shiny or shiny appearance. It is possible to provide a cosmetic that does not give an unnatural shine.

In order to investigate the transparency of the coated pigment used in the present invention, the whiteness of the extender pigment before coating and the processed powder after coating was measured and shown in Table 2. It can be said that the lower the whiteness, the greater the transparency. The test method is as follows.

Transparency test: Samples were processed in the same manner as used in the gloss test and used as specimens.

The whiteness of this product was measured using a high-speed colorimeter manufactured by Murakami Menshu in accordance with JIS L 1074 r Whiteness.

As described above, the coated pigment used in the present invention exhibits a whiteness value similar to that of the uncoated pigment that is the inner core material, that is,
It has similar transparency and is a useful powder for cosmetics.

Next, in order to examine the fluidity of the coated pigment used in the present invention, the angle of repose of the extender pigment before coating and the processed powder after coating was measured and shown in Table 3. The smaller the angle of repose, the greater the fluidity.

The test method is as follows.

Fluidity test: The angle of repose of the sample was measured using a powder tester made by Micron.

As described above, the coated pigment used in the present invention exhibits a repose angle value similar to that of the uncoated pigment that is the inner core material, that is,
It has similar fluidity and is convenient to handle during cosmetic production, as well as spreading smoothly on the skin.

Next, the cosmetics (Examples 1 to 4) applied to the present invention were subjected to sensory evaluation, and the results are shown in Table 4. At this time, as a control product, each cosmetic was mixed with a non-coated pigment (inner core material of processed powder) instead of the coated pigment used in the present invention, and sensory evaluation was performed.

The test method is as follows.

Sensory test: A panel of 7 mixed male and female needlewomen evaluated the following three sensory evaluation items: gloss of the makeup-applied skin, smoothness of spread on the skin, and transparency of the makeup-applied skin. The average value of the seven participants was used as the evaluation score.

Table 4: As shown in Table 4, even when the cosmetics applied to the present invention are actually applied to the skin, they do not make the makeup-covered skin look too shiny, and do not give a shiny or unnatural shine to the skin. Furthermore, the sensory properties such as smoothness of spread on the skin and transparency of the skin after makeup were similar to those of the conventional control product.

As described above, the coated pigment used in the present invention has the excellent properties of conventional pigments, and at the same time has a novel gloss control ability, making it a powder with excellent properties not found in conventional cosmetic pigments. It turns out that it is a body.

Patent applicant: POLA CHEMICAL INDUSTRIES, INC.

Claims (1)

[Scope of Claims] A cosmetic comprising one or more coated pigments, the surface of which is coated with one or more inorganic silicon compounds. 2) The cosmetic according to claim 1), wherein the pigment is an extender pigment. 3) The cosmetic according to claim 1, wherein the inorganic silicon compound is silicon dioxide and/or a silicate compound.