JPH11236211A - Terraced field-like talc and cosmetic formulated therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body pigment which has adequate luster and smooth texture, has good moldability and does not cake. SOLUTION: The terraced field-like talc has the terraced field-like surface state of respective pulverized talc particles. The terraced field-like talc is adequately obtd. by pulverizing the raw ore of laminar talc aggregate by mechanical wet process pulverization. The cosmetic is obtd. by formulating the terraced field-like talc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to talc, and more particularly to the improvement of its surface condition.

[0002]

2. Description of the Related Art Talc is a clay mineral having an ideal formula of Mg ₃ Si ₄ O ₁₀ (OH) ₂ . Its properties include low hardness, low electrical conductivity, high whiteness, tasteless and odorless, chemically and thermally inert, and high oil-absorbing ability. Furthermore, because of its low cost and abundant output, its characteristics are used in a wide range of industrial fields such as papermaking, fiber, rubber, medicine, and cosmetics. Especially in the field of cosmetics, its smooth feel, optical properties, and moldability, including baby powder,
The availability of talc, such as makeup cosmetics, spray products, and packs, is endless.

[0003] Talc is also used as an extender of powder cosmetics. The extender pigment in powder cosmetics is
It is not just a bulking agent, but an important material related to the quality of the cosmetic itself, which affects the usability, finish, and moldability of the cosmetic. Conventionally, clay minerals such as mica, sericite, kaolin, and talc have been mainly used as extenders for foundations and blushers.

[0004]

The characteristics of the above-mentioned extender pigments are that mica has a gloss but poor moldability, and sericite has a moderate gloss and a smooth feel, but lacks moldability and kaolin lacks moldability. Although it has good properties, it is easy to cake, and talc has a smooth feel and good moldability, but has all advantages and disadvantages, such as lack of luster and easy caking. The present invention has been made in view of the above problems, has an appropriate gloss and smooth feel, and has good moldability,
An object of the present invention is to provide an extender that does not cake.

[0005]

Means for Solving the Problems To achieve the above object, a terraced talc according to the present invention is characterized in that each of the ground talc particles has a terraced surface state. Moreover, the terraced talc according to the present invention is preferably obtained by pulverizing raw ore of a layered talc ore lump by mechanical wet pulverization. Further, the cosmetic according to the present invention is characterized in that the above-mentioned terraced talc is blended.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have intensively studied to provide an extender which has a moderate gloss and a smooth feel, has good moldability, and does not cake. It has been found that the smoothness of the feel and the formability are substantially inherited from the properties of the clay mineral itself as the raw material. In addition, it was found that the surface condition of the particles significantly affected the gloss.

[0007] Mica is very glossy, but when its surface state is observed, it has a layered crystal structure, but the cleavage planes that appear are much wider. Inspection of the surface condition of the original talc ore reveals that although it has a layered crystal structure, there are many irregularly shaped fine powders due to low hardness, and the surface of the talc particles has become rough. Yes,
Although a large number of cleavage planes appear, each of the cleavage planes is very narrow, and as a result, it looks like a mass having many irregularities. Examining this difference, mica with a much wider cleavage plane is very glossy, and conversely, there are many fine powders on the surface and the surface itself is rough, Talc that does not have a wide cleavage plane has no luster and is sometimes used to suppress luster.

Considering these facts, a crystal state having a wide flat surface is good for producing gloss, and conversely, to eliminate the gloss, a crystal having few flat surfaces and very many irregularities is required. It was expected that the existing state would be better. Japanese Patent Publication No. 62-10965 discloses a thin plate-like smooth talc having a single layer surface by chemical pulverization, but it is considered that the talc is too glossy for the above-mentioned reason. It is not too shiny like mica, and it is not glossy like ordinary talc, it has a flat surface as a surface state with moderate luster, but the plane has a moderate cleavage plane that is not too wide As a state, I came to the idea of a terraced surface. In the present invention, the talc powder having a terraced rice-like particle surface means that the surface of the plate-like powder is not a single layer, but a plurality of cleavage planes of the talc crystal appear as shown in FIG. Say talc became.

However, dry pulverization such as a roll mill, a hammer mill, or a jet mill, which is usually used, results in powder that is broken even in a lump or plate shape, and the plate-like talc of the present invention in which the particle surface is in a rice terrace shape is obtained. I couldn't get it. Then, when the raw ore of talc to be exfoliated in layers was mechanically wet-pulverized, a plate-like talc having a terraced surface of the present invention could be obtained. Specifically, 2 to 10 mm
After coarse pulverization, water was added, and the mixture was peeled and pulverized with a stirring mill. The rice terraced talc of the present invention pulverized in this manner may be classified as appropriate because it contains fine powder and large particles that feel rough.

When the present invention is used in cosmetics, there is no difference from the particle size of talc used in ordinary cosmetics, and it is 1 to 20 μm in terms of spherical equivalent diameter according to Sedigraph 5000-01 type.
m, 5 to 35 in laser scattering diameter by microtrack
μm is preferred. In addition, the shape of a single particle is not meaningful even if the particle size of one layer is not much different, or conversely, if there is too much difference, the meaning of the shape of a rice terrace is lost. Suitably, the ratio of the sizes of adjacent layers is approximately 1: 0.9 to 1: 0.1. Further, it is preferable that three or more layers having different particle diameters overlap each other, and the thickness of the particles is 0.2 μm to
1.1 μm is preferred.

When the present invention was incorporated into a cosmetic, it was confirmed that the composition had good moldability, did not cake, had a smooth feel, and had an appropriate luster. In addition, it has been confirmed that when blended in a foundation, makeup base, lipstick, or nail enamel, the fit is improved. Therefore, the application of the present invention to cosmetics can be used in a wide range of applications such as foundations, white powders, makeup bases, lipsticks, eye shadows, eye liners, nail enamels, and the like. Furthermore, the form of cosmetics is powder, powder solid, stick,
It can be in the form of a slurry, and raw materials to be blended with general cosmetics can be blended as appropriate, similarly to ordinary talc.

[0012] The reason why such an effect of a good formability, smoothness, moderate luster, and non-caking extender can be obtained is that the good formability is an original property of talc, and the smoothness is This is probably because the Mohs hardness of the talc is as soft as 1. The reason for having a moderate luster is that, as described above, the plate-like shape has a flat surface, and thus has a luster, but the luster is moderately suppressed because these are in a terraced shape. it is conceivable that. Although the reason for no caking is not clearly understood, experiments using the product of the present invention have confirmed that a remarkably higher effect can be obtained as compared with the conventional product.

[0013]

The present invention will be described in more detail with reference to the following examples. [Production Example] A talc ore block formed by layering raw ore from Sichuan Province, China was ground to about 1 to 3 cm with a jaw crusher, and further ground to 2 to 10 mm with a hammer mill. This was mixed with water at a weight ratio of 1: 1 and pulverized with a stirring type wet mill, and the obtained talc powder was classified to obtain a plate-like talc powder having a terraced particle surface of the present invention. . The laser scattering diameter measured by Microtrack was 20 μm, and the spherical equivalent diameter measured by Sedigraph 5000-01 was 4 μm. Observing the talc powder with the terraced particle surface obtained in the above process with an electron microscope, and comparing it with the surface state of talc powder obtained by jet-milling talc-like talc, which is usually used as an extender, and synthetic mica As a result, the following results were obtained.

FIG. 2 is a photomicrograph of a talc powder having a terraced particle surface of the present invention. As can be seen from this photograph, one layer of the layered talc has an appropriate flat surface, which is like a terrace. When the product of the present invention having such a surface condition is used for cosmetics, it gives a transparent feeling when applied on the skin due to the inherent properties of talc, but the property of the present invention in which an appropriate flat surface exists on the particle surface Because, while having a moderate luster, it suppresses the gloss more than necessary because of the terraced rice paddy, and this terraced rice pad diffuses light, giving the skin a natural luster and fine wrinkles etc. The work of hiding was also recognized.

FIG. 3 is an electron micrograph of talc powder obtained by jet-pulverizing talc in the form of talc. In this photo, you can see that many cleavage planes appear on the particle surface, but each of the planes is very narrow and looks like a lump with irregular irregularities, and the surface is roughened. I have. For this reason, light diffusion is superior to the product of the present invention, but has no luster.

FIG. 4 is an electron micrograph of synthetic mica. As can be seen from the photograph, mica has a cleavage plane having a very wide plane. For this reason, it is very rich, but it is too glossy.

2 to 4, it can be seen that the surface condition of the present invention in FIG. 2 is just intermediate between the normal talc in FIG. 3 and the mica in FIG. You can see. As described above, the talc powder having a terraced rice particle surface of the present invention has the smoothness of touch, which is a useful property of talc itself, excellent moldability, and a moderate luster that has not been achieved in conventional talc. Have

[Cosmetic Example] A foundation was manufactured using talc powder having a terraced rice-like surface condition of the present invention as an extender. For comparison with this foundation, a foundation was similarly prepared using ordinary talc, sericite, and mica as an extender, and a comparative experiment was performed. Further, in order to examine whether the effect obtained by the terraced talc of the present invention is not obtained unless the terraced talc is obtained, a plate-shaped single-layer talc having a particle size substantially the same as that of the present invention, An experiment was conducted to determine whether the same effect could be obtained by using a plate-like single-layer talc having a particle size substantially the same as the particle size of the small particle size portion. Further, a comparison was made between the talc powder obtained by wet-grinding the bulk talc and the product of the present invention. As shown in the following table, each component ratio is the same except for each mineral used as an extender. [Composition Table] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 ── Terraced talc 60 Normal talc 60 Sericite 60 Mica 60 Nylon powder 10 10 10 10 Titanium oxide 15 15 15 15 15 Iron oxide pigment 2 2 2 2 Oil 13 13 13 13合計 Total 100 100 100 100 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7板 Plate-like talc (large) 60 30 Plate-like talc (small) 60 30 Lumpy talc 60 Nylon powder 10 10 10 10 Titanium oxide 15 15 15 15 Iron oxide pigment 2 2 2 2 Oil 13 13 13 13 合計 Total 100 100 100 100

As is clear from the composition table, the foundation of Example 1 is a foundation using the talc powder having a terraced surface state of the present invention as an extender, and Comparative Example 1 is prepared using ordinary talc. Comparative Example 2 used sericite, Comparative Example 3 used mica, Comparative Example 4 used a plate-like talc having substantially the same particle size as the terraced talc used in Example 1, and Comparative Example 5 used in Example 1. A plate-like talc having a particle size substantially the same as the particle size of the small particle size portion of the terraced talc was compared with a talc obtained by mixing half of the talc having different particle sizes used in Comparative Examples 6 and 5 in Comparative Example 6, Comparative Example 7 is an example in which massive talc was pulverized by wet pulverization and used as an extender pigment.
The particle size of the terraced talc of Example 1, the particle size of plate-like talc having substantially the same particle size as the terraced talc of Comparative Example 4, and the particle size of the small particle size portion of the terraced talc of Comparative Example 5 The particle diameter of the plate-like talc having the same particle diameter, and the particle diameter of the massive talc of Comparative Example 7 were measured with a laser scattering diameter of 20 μm, 20 μm, 5 μm, 15 μm, and Sedigraph 5000-01 type, respectively, as measured by Microtrack. The spherical equivalent diameter is 4μ
m, 4 μm, 1 μm, and 4 μm.

The seven foundations were evaluated for moldability, caking, smoothness, and luster. The evaluation method is as follows.
g into a foundation dish with a diameter of 5 cm.
The hardness at the time of molding at 50 kg / cm ² was evaluated by the penetration using an Olsen hardness tester.
35 is represented by ○, 36 to 50 is represented by Δ, and 50 or more is represented by ×.

For the caking, smoothness, and luster, each of the foundations was used by 15 specialized panels, and for the caking, 1 was used for caking, 2 for easy, 3 for difficult, and 4 for no. Regarding smoothness, 1 is not smooth, 2 is not very smooth, 3 is slightly smooth, 4 is smooth, and gloss is 1 if none, 2 is not good, 2 is moderate, and 3 is too much. Excessiveness was evaluated for each with 5 and the average was evaluated and evaluated. For caking and smoothness, 4.0 to 3.5 were evaluated as ◎, 3.4 to 2.5 as ○,
2.4 to 1.5 are indicated by Δ, and 1.4 to 1.0 are indicated by X, and for gloss, 2.4 to 3.5 are indicated by ◎, 3.6 to 4.2, and 1.8 to 2.2. 3 is ○, 1.0 to 1.7 is Δ, 4.3 to
5.0 is indicated by x. The results of this comparative experiment are shown in Table 1 below.
As shown in Table 2 [Table 1] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 ────── Moldability ◎ ◎ △ × Caking ◎ × ○ ○ Smoothness ◎ △ ◎ ○ Gloss ◎ ○ ◎ × ────────────────────── [Table 2] Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7成型 Moldability ○ ◎ ○ ◎ Caking × × × × Smoothness ◎ △ ○ △ Gloss × △ × △ ──────────── ────────────────────────

As is clear from the table, Comparative Example 1 using ordinary talc had a good evaluation on moldability, but most of the respondents indicated that gloss was not good. Another characteristic of ordinary talc is that it has been caked. It is considered that the reason why the smoothness was not good was not obtained because the oil was mixed with the oil component in the foundation component to cause caking, and the powder was firmly condensed even for a sponge or the like. In Comparative Example 2 using sericite, it was answered that the luster was moderate, hard to cake, and smooth, and it seems that a reasonable feeling of use could be obtained. It was not so good. In Comparative Example 3 using mica, although the caking was difficult, many respondents answered that the smoothness was slightly smooth, and many respondents indicated that the material had gloss but was too much, and good results were not obtained with regard to moldability. . On the other hand, in Example 1 using the talc powder having a terraced surface state of the present invention,
Excellent results were obtained.

When compared with the plate-like talc, the plate-like talc having a large particle size in Comparative Example 4 was rich in smoothness, but was slightly inferior in moldability and was too glossy. I ended up with caking again. Conversely, the plate-like talc having a small particle diameter in Comparative Example 5 is better in moldability than the large particle, but has a reduced smoothness and feels grainy. In addition, caking also occurred, resulting in no luster. Further, Comparative Example 6 in which both were mixed was not so different from Comparative Example 4 having a large particle size in terms of moldability, and although a slightly better result was obtained in Comparative Example 5 in terms of smoothness, it was too glossy. There were many answers, and further caking occurred. The bulk pulverized talc of Comparative Example 7, which was wet-pulverized, had good moldability, but was not so smooth and shiny. In addition, it caused caking.

Thus, even if the particle size is controlled, the same effect as in the present invention cannot be obtained. From this, it can be said that the effect obtained by the present invention can be obtained because the surface state of the particles of the talc powder is in a terraced shape. In addition, even when wet crushing of massive talc in which the raw ore is not layered, the effect as in the present invention could not be obtained.

Next, several examples of blending the talc powder of the present invention in which the surface state of the particles is in the shape of a rice terrace are blended with a cosmetic. Rice terraces like talc blusher present invention by face powder terraced fields like talc 46.0% precipitated calcium carbonate 40.0% Titanium dioxide 8.0% zinc stearate 6.0% pigment qs Perfume qs <method> conventional method of the present invention 80.0% Zinc white 5.0% Zinc stearate 5.0% Rice starch 10.0% Pigment appropriate amount Fragrance appropriate amount Preservatives appropriate amount <Production method> Eyeliner ultramarine blue by ordinary method 25.0% Iron oxide 4.0% Rice terraced talc of the present invention 10.0% Palmitic acid 18.0% Carnauba wax 5.0% Lanolin derivative 10.0% Polyethylene glycol 1500 10.0% Triethanolamine 18.0% Fragrance Suitable amount Antioxidant Suitable amount <Production method> By law

[0026]

As described above, the talc according to the present invention can improve the optical characteristics such as luster while maintaining the physical characteristics of the talc by making the surface of the talc a terraced shape. Moreover, since the cosmetic according to the present invention contains talc in the shape of a terraced rice field, it is possible to impart an appropriate luster and obtain good usability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a talc powder having a terraced particle surface of the present invention.

FIG. 2 is a micrograph of a talc powder having a terraced particle surface of the present invention.

FIG. 3 is an electron micrograph of talc powder obtained by jet-pulverization of talc in the form of limestone.

FIG. 4 is an electron micrograph of synthetic mica.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokushin Yoshikawa 1050 Nippa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture Inside Shiseido Daiichi Research Center Co., Ltd. (72) Hideki Takahashi Nippa-cho, Kohoku-ku, Yokohama, Kanagawa No. 1050 Shiseido Daiichi Research Center Co., Ltd. (72) Inventor Makoto Saito 577-3 Sasakihara, Ina, Ozai-cho, Kosakai-cho, Aichi Prefecture Inside of Mika Kogyo Co., Ltd. (72) Norihisa Yamaguchi Inventor Norihisa Yamaguchi Aichi Prefecture 577-3, Sagamihara, Sakaihara, Ina, Kozai-machi, Japan. (72) Inventor Naohiko Kawamoto Inventor: Naohiko Kawamoto 577-3, Sakatahara, Ina, Kozai-cho, Kosakai-machi, Hoai-gun, Aichi Prefecture.

Claims (3)

[Claims] 1. A talc powder characterized in that the surface condition of each of the ground talc powder particles is in the shape of a terraced rice field. 2. The method according to claim 1, wherein the raw ore of the layered talc ore lump is powdered by mechanical wet pulverization.
The talc powder as described. 3. A cosmetic comprising a talc powder having a surface of each particle in a terraced rice field.