JP2016164249A - Flat cellulose composite powder, method for producing the same and cosmetics comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic powder excellent in transparent feeling and unevenness-correcting effect and cosmetics prepared therewith.SOLUTION: A flat cellulose composite powder has a surface coating with a powder with a refractive index of 1.4-2.0 on a base material powder comprising cellulose material.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flat cellulose composite powder, a production method thereof, and a cosmetic containing the same.

Makeup cosmetics such as powder foundations and liquid foundations are required to correct irregularities such as pores and wrinkles in the skin, and color tone such as spots and dullness.

Conventionally, as a technique for making the unevenness of the skin inconspicuous, a method of blending a spherical powder with a high light diffusion effect such as silicone elastomer or silica, a method of blending a powder obtained by combining a spherical powder with a plate-like powder For example, a method of blending a powder having high glitter is used. In addition, as a technique for concealing the entire skin including spots and dullness, a method of highly blending titanium oxide or the like having a high refractive index is used.

On the other hand, since cellulose has a large number of hydroxyl groups in the molecule, it has a strong intermolecular force due to hydrogen bonding and is likely to aggregate. Therefore, a flat cellulose powder in which a cellulose-based substance and a fatty acid are mixed and then mechanically pulverized is developed (Patent Document 1).
Such a flat cellulose powder is made of cellulose and has a flat shape. Therefore, when blended in a powder cosmetic, the powder does not agglomerate even if the amount of the oil component is large. It has the great advantage that it does not easily cause caking even when the body is pressed.

As an example in which this flat cellulose is applied, Patent Document 2 discloses a flat cellulose powder in which a metal oxide is combined. This is for the purpose of UV blocking effect or natural hiding.

JP 2011-127124 A WO2012 / 133018

The method of blending spherical powders such as the above silicone elastomer and silica, or compounding the spherical powder into a plate-like powder can provide a soft matte finish, but the unevenness correction effect is insufficient. there were. In addition, the method of blending glitter powder such as a pearl pigment sometimes causes an unnatural glossiness. In addition, when a high refractive index powder such as titanium oxide is blended in a high amount, there is a problem that a thick coating sensation is produced, resulting in an unnatural finish, concavity and convexity being conspicuous, and elongation being heavy.

On the other hand, the flat cellulose powder has excellent performance as described above, but does not have an unevenness correction effect. If such an unevenness correction effect can be imparted to the flat cellulose powder, it can be used as a cosmetic raw material having many excellent performances, thereby obtaining an unprecedented excellent cosmetic. it can.

Since the flat cellulose powder compounded with the metal oxide of Patent Document 2 has a refractive index of a metal oxide used higher than 2.0, the average particle diameter of the metal oxide is 0.00. When the pigment grade particle is 1 μm or more, there is a problem that there is a feeling of thickness and an unnatural finish is obtained. On the other hand, when the average particle diameter of the metal oxide is less than 0.1 μm, a cosmetic material having a transparent to pale color in the visible light region and having a concavo-convex correction effect and a transparent finish is obtained. It wasn't something that could be done.

The present invention is a flat cellulose composite powder characterized by having a surface coating with a powder having a refractive index of 1.4 to 2.0 on a base material powder made of a cellulose-based material.
Furthermore, the present invention provides a powder having a refractive index of 1.4 to 2.0 and a refractive index of 2.0 to 3.1 (except for a case of 2.0) on a base material powder made of a cellulosic material. It is also a flat cellulose composite powder characterized by having a surface coating with powder.

The flat cellulose composite powder is preferably obtained by mechanically mixing a cellulose material as a raw material, a flattening aid, and a raw material powder having a refractive index of 1.4 to 2.0.
The flat cellulose composite powder preferably has an average particle diameter of 1 to 50 μm, an average thickness of 0.1 to 10 μm, and a flatness of 4 to 200.

The present invention comprises the above-described flat cellulose, which comprises a step of mechanically mixing a cellulose material as a raw material, a flattening aid and a raw material powder having a refractive index of 1.4 to 2.0. It is also a method for producing composite powder.
The present invention includes a cellulose material as a raw material, a flattening aid, a raw material powder having a refractive index of 1.4 to 2.0, and a refractive index of 2.0 to 3.1 (except when 2.0). It is also a method for producing the flattened cellulose composite powder described above, which comprises a step of mechanically mixing the raw material powder.

The present invention includes a step of mechanically mixing a cellulosic material as a raw material, a flattening aid, and a raw material powder having a refractive index of 2.0 to 3.1 (except for a case of 2.0) (1 ) And the step (1), and the step of mechanically mixing the raw material powder having a refractive index of 1.4 to 2.0. It is also a method for producing powder.
This invention is also the cosmetics which mix | blended the said flat cellulose composite powder.

When blended in cosmetics, the flat cellulose composite powder of the present invention has a high level of irregularity correction effect that cannot be obtained with conventional cosmetic powders, and the flat cellulose powder originally has Since it does not impair the performance as a cosmetic powder, it spreads smoothly on the skin, and a highly transparent finish can be obtained.

Furthermore, the flat cellulose composite of the present invention having a surface coating with a powder having a refractive index of 1.4 to 2.0 and a powder having a refractive index of 2.0 to 3.1 (except for the case of 2.0). In addition to the above-described effects, the powder has an effect that is excellent in natural hiding properties such as spots and dullness.

It is the photograph which observed the surface of the lauroyl lysine processing flat cellulose powder obtained in manufacture comparative example 1 with the scanning microscope (3000 times). It is the photograph which observed the silica surface before mixing used in manufacture Examples 1-2 and manufacture comparative example 1 with the scanning microscope (3000 times). It is the photograph which observed the surface of the lauroyl lysine processing silica composite flattened cellulose powder obtained in manufacture example 1 with the scanning microscope (3000 times). It is the photograph which observed the surface of the lauroyl lysine processing silica obtained in manufacture example 7, and the titanium oxide composite-composed flat cellulose powder with the scanning microscope (5000 times).

The flat cellulose composite powder of the present invention is obtained by forming a surface coating with a powder having a refractive index of 1.4 to 2.0 on a base material powder made of a cellulosic material. Such flat cellulose composite powder is obtained by firmly attaching powder having a refractive index of 1.4 to 2.0 on the surface of the base powder.

The visual effect of cosmetic powders is mainly determined by the transmission, reflection, and absorption of visible light. For example, when a pigment having a very high visible light reflectance is used, Since the transparency is low, the pigment becomes a highly concealed pigment on the skin surface. While such a pigment plays an important role in cosmetics, it is difficult to obtain a natural finish with high transparency. Also, the unevenness of the skin may be conspicuous due to the difference in brightness. In the case of pigment grade particles having a refractive index exceeding 2.0 and a particle size of 0.1 μm or more, it tends to have such properties.

On the other hand, a pigment having a low visible light reflectance and a high transparency may not only have a low concealment property for uneven color on the skin surface, but may not have sufficient ability to conceal skin irregularities.

In order to achieve both the transparency and the unevenness correction effect which are the objects of the present invention, it is required to blur the unevenness of the skin surface by appropriately transmitting and scattering visible light in a translucent state like ground glass.

In the present invention, moderate scattering and transmission of visible light can be achieved by attaching a powder having a preferable refractive index to obtain an unevenness correction effect in the range of a refractive index of 1.4 to 2.0 on flat cellulose. The pigment which has a desirable effect also in the point of the outstanding uneven | corrugated correction effect, maintaining the suitable performance in the usability | use_condition of the cosmetics which flat cellulose powder has can be obtained.

The flat cellulose of the present invention has a coating made of a powder having a refractive index of 1.4 to 2.0 and a powder having a refractive index of 2.0 to 3.1 (except when 2.0). It may be a thing. That is, in addition to the above-mentioned powder having a refractive index of 1.4 to 2.0, powder having a refractive index of 2.0 to 3.1 (except for the case of 2.0) is also present in the coating layer. It may be.

The stratum corneum on the surface layer of the bare skin plays an important role in maintaining moisture in the living body with a tissue of about 10 to 20 μm. There is a gradient that the water content in the deep stratum corneum is high and the surface layer is low. It is said that the moisture in the stratum corneum is about 20-30%. It is known that the main component keratin of the stratum corneum has a refractive index of 1.54, a water refractive index of 1.33, and the stratum corneum exhibits a lower refractive index as the water content increases. Therefore, when the decorative film surface layer is formed of a substance having a refractive index of about 1.5, it approximates the refractive index of the bare skin surface layer, and a cosmetic finish with a feeling of bare skin is obtained, and an unevenness correcting effect can be obtained. However, there are cases where it is not enough to hide spots and dullness.

On the other hand, when the surface layer of the decorative film is formed only with pigment grade powder having a refractive index of greater than 2.0, spots and dullness can be hidden, but a thick and unnatural finish is obtained.
A flat cellulose composite powder having a coating with both a powder having a refractive index of 1.4 to 2.0 and a powder having a refractive index of 2.0 to 3.1 (excluding cases where the refractive index is 2.0) It is possible to obtain a cosmetic film with a natural finish that is covered with a semi-transparent veil such as bare skin while concealing uneven color and irregularities such as spots and dullness. One type of powder is preferable in that it can simultaneously obtain two effects of the unevenness correction effect and the concealment property.

When a powder having a refractive index of 2.0 to 3.1 (excluding a case where it is 2.0) alone is blended in cosmetics as in the past, it is difficult to loosen the powder and it is squeezed at the time of application. It was difficult to get a natural finish because it felt a certain hiding power and a unique hiding power. Such a problem is caused by attaching powder having a refractive index of 1.4 to 2.0 and powder having a refractive index of 2.0 to 3.1 (except for the case of 2.0) on flat cellulose. The particles having the unevenness correction effect and the natural concealing property can be obtained.

The cellulosic material constituting the base powder of the flat cellulose composite powder of the present invention is not particularly limited, and is a fibrous or powdery wood powder originating from wood or a woody material such as wood pulp. Mention may be made of cotton-based materials such as materials, fibrous or powdered cotton originating from cotton or linter fibers.

It is preferable to use a fibrous or powdery cellulosic material obtained by refining the woody material or cotton-based material as described above, and purification obtained by acid hydrolysis of such a cellulosic material. Cellulosic materials may be used.

Further, the powder having a refractive index of 1.4 to 2.0 constituting the flat cellulose composite powder of the present invention is a component generally used in cosmetics, and may be a powder having a refractive index within the range. It is not limited, and any inorganic powder and organic powder can be used.

More specifically, the powder having a refractive index of 1.4 to 2.0 may be silica, barium sulfate, calcium carbonate, hydroxyapatite, aluminum oxide, calcium sulfate, polyurethane powder, poly (meth) acrylate powder, Examples thereof include ethylene / (meth) acrylic acid ester copolymer powder, nylon powder, and a crosslinked organopolysiloxane polymer, and one or more can be used.

The polyurethane powder is a resin powder made of polyurethane, and the composition of the polyurethane resin constituting the resin powder is not particularly limited, and an arbitrary one can be used. The poly (meth) acrylic acid ester powder may be one or more monomers selected from alkyl acrylate (C1-C4), alkyl methacrylate (C1-C4), acrylic acid or methacrylic acid, and necessary. A polymer composed mainly of a divinyl monomer used in accordance with the above. The ethylene / (meth) acrylic acid ester copolymer powder is one or two selected from ethylene and alkyl acrylate (C1-C4), alkyl methacrylate (C1-C4), acrylic acid or methacrylic acid. It refers to a copolymer of more than one monomer and a divinyl monomer used as necessary.

When the refractive index of the powder is less than 1.4, there is almost no effect of correcting the unevenness and color tone of the skin. If the refractive index of the powder is greater than 2.0, the hiding power for correcting the skin tone is high, but it is not a good material from the viewpoint of obtaining soft focus. The lower limit of the refractive index is more preferably 1.5. The upper limit of the refractive index is more preferably 1.9, and still more preferably 1.8.

The shape of the powder having a refractive index of 1.4 to 2.0 is not particularly limited, and examples thereof include a spherical shape, a granular shape, a polygonal shape, a confetti shape, and an indefinite shape. By performing the compounding process, the shape may be different from that before the compounding.
The powder having a refractive index of 1.4 to 2.0 may change in shape and particle size before and after compounding due to disintegration, crushing, and melting in the process of compounding with a cellulose material as a raw material. Any shape and particle size that adheres on the cellulose powder and provides a light diffusion effect may be used.

The flat cellulose composite powder is, for example, in the form of a flake having an average particle diameter of 1 to 50 μm, preferably 5 to 40 μm, and an average thickness of 0.1 to 10 μm, preferably 0.2 to 2 μm. And the flatness is 4 to 200, preferably 6 to 100. By setting it as the thing of such a range, the usability | use_condition as cosmetic powder can be made favorable.

Here, the average particle size is the average of the width and length of the flat cellulose powder measured in a dispersed state in ethanol using a particle size distribution measuring device such as a laser diffraction / scattering particle size distribution measuring device. Value (particle size value with an integrated volume of 50%). In addition, the average thickness refers to a value obtained by selecting a plurality of particles having the same size as the average particle size obtained above with an electron microscope such as a scanning electron microscope, measuring the thickness, and averaging the values. Say. Further, the flatness is the average particle diameter / average thickness determined as described above.

In the flat cellulose composite powder of the present invention, the content of the powder having a refractive index of 1.4 to 2.0 is preferably 1 to 50% by mass with respect to the total amount of the flat cellulose composite powder. If it is less than 1% by mass, the effect of correcting the unevenness and color tone of the skin is low, and if it exceeds 50% by mass, it is difficult to obtain a feeling of adhesion to the skin. The lower limit of the content of the powder having a refractive index of 1.4 to 2.0 is more preferably 3% by mass, and the upper limit is more preferably 40% by mass.

The above flat cellulose composite powder exhibits excellent light diffusion characteristics when the particle diameter of the composite powder having a refractive index of 1.4 to 2.0 is 0.1 μm to 5.0 μm. The unevenness and color tone of can be corrected. In addition, the particle size of the powder having a refractive index of 1.4 to 2.0 may be changed before and after the compounding, and the particle size after the compounding may be 0.1 μm to 5.0 μm. The particle diameter of the powder having a refractive index of 1.4 to 2.0 is a value measured by observation with a scanning electron microscope.

The flat cellulose composite powder may also have a coating made of powder having a refractive index of 2.0 to 3.1 (excluding the case of 2.0). Such a coating may be a coating in a mixed state with the above-described powder having a refractive index of 1.4 to 2.0, or a separate coating layer may be formed for each to form a refractive index of 1.4 to 2.0. It may have a coating consisting of two layers with a surface layer of the above powder.

Examples of the powder having a refractive index of 2.0 to 3.1 (except when 2.0) include iron oxide, titanium oxide, zinc oxide, cerium oxide, and the like. These can be used singly or in combination of two or more.

The shape of the powder having a refractive index of 2.0 to 3.1 (excluding the case of 2.0) is not particularly limited, and examples thereof include a spherical shape, a granular shape, a polygonal shape, a confetti shape, and an indefinite shape. By performing the compounding process, the shape may be different from that before the compounding.
The powder having a refractive index of 2.0 to 3.1 (excluding the case where the refractive index is 2.0) has a shape and a particle size before and after compounding due to collapse or crushing in a process of compounding with a cellulose material as a raw material. However, the shape and particle size may be any shape that adheres to the flat cellulose powder and provides a concealing effect.

In the flat cellulose composite powder of the present invention, the content of the powder having a refractive index of 2.0 to 3.1 (except for the case of 2.0) is 1 to 1 with respect to the total amount of the flat cellulose composite powder. It is preferably 30% by mass. If it is less than 1% by mass, the effect of correcting the skin tone is low, and if it exceeds 30% by mass, it aggregates on the flat cellulose and exhibits a specific hiding power, making it difficult to obtain a natural cosmetic finish. The lower limit of the content of the powder having the refractive index of 2.0 to 3.1 (excluding the case of 2.0) is more preferably 5% by mass, and the upper limit is more preferably 20% by mass.

In the flat cellulose composite powder, the particle diameter of the composite powder having a refractive index of 2.0 to 3.1 (except for the case of 2.0) is 0.1 μm to 0.5 μm. Excellent concealment effect and excellent skin tone correction effect. Note that the particle size of the powder having a refractive index of 2.0 to 3.1 (excluding the case of 2.0) may be changed before and after the compounding, and the particle size after the compounding is 0.1 μm. What is necessary is just -0.5micrometer. The particle size of the powder having a refractive index of 2.0 to 3.1 (excluding the case where the refractive index is 2.0) is a value measured by observation with a scanning electron microscope.

When using the above-mentioned powder having a refractive index of 2.0 to 3.1 (except when 2.0), powder having a refractive index of 1.4 to 2.0: refractive index of 2.0 to 3. The powder (mass ratio) of 1 (excluding the case of 2.0) is preferably 1: 5 to 5: 1.

In the flat cellulose composite powder of the present invention, the flattening aid used in the production thereof may be present as a part of the constituent components of the flat cellulose composite powder.
The flattening aid prevents aggregation of the base material particles made of the cellulosic material, and powder having a refractive index of 1.4 to 2.0 and a refractive index of 2.0 to 3.1 used as necessary. (Except for the case of 2.0) is used to satisfactorily adhere to the surface. That is, since the cellulosic material has many hydroxyl groups in the molecule, it tends to aggregate due to hydrogen bonding, and it is difficult to maintain a flat state. However, by attaching such a flattening aid, aggregation can be suppressed and the state can be maintained.

The flattening aid is not particularly limited as long as it can suppress aggregation of the base material particles made of the cellulosic material and keep the flat state. As such a flattening aid, known flattening aids described in Patent Documents 1 and 2 can be used. Specific examples thereof include amino acids and fatty acids. These may be used alone or in combination of two or more.

Examples of the amino acids include N-acyl amino acids such as N-lauroyl-L-lysine.

Examples of the fatty acids include saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid and salts thereof, and unsaturated fatty acids such as oleic acid and salts thereof.

In the flat cellulose composite powder of the present invention, the amount of the flattening aid is preferably 0.5 to 5% by mass, more preferably 1 to 3% by mass with respect to the total amount of the flat cellulose composite powder. %. If it is less than 0.5% by mass, the effect of suppressing the aggregation of the cellulosic substance is insufficient and it is difficult to maintain a flat state. If it exceeds 5% by mass, the characteristics of the flattening aid are strong or weak. May occur.

Below, an example of the manufacturing method of the flat cellulose composite powder of this invention is demonstrated. The flat cellulose composite powder of the present invention is not limited to those obtained by the production method shown below, but the flat cellulose composite powder obtained by the following production method is particularly suitable in the cosmetics field. It can be used for.

The cellulosic material that is the starting material is not particularly limited in shape, size, etc. at the time of the raw material as long as it is composed of the above-described materials. For example, particles, powders, etc. can be used.

As the cellulosic material used as a raw material, a material obtained by drying to reduce the water content to 0.1% by mass or less can be suitably used. Since the cellulosic material easily adsorbs or absorbs moisture, it normally has about 3 to 10% by mass of moisture. Therefore, it is preferable to dry in advance by vacuum drying, hot air drying, vacuum drying or the like before the mixing treatment to remove adsorbed moisture.

A powder having a refractive index of 1.4 to 2.0 used in the production of the flat cellulose composite powder of the present invention and a refractive index of 2.0 to 3.1 used as necessary (except for the case of 2.0). ) May have the same or different shape and particle size before and after compounding. In particular, even if the powder having a refractive index of 1.4 to 2.0 has an indefinite shape after being combined, the light diffusion effect is high, and the effect of naturally correcting the unevenness and color tone of the skin can be obtained.

The method for producing a flat cellulose composite powder of the present invention comprises a step of mechanically mixing the above-mentioned cellulose-based material, flattening aid and powder having a refractive index of 1.4 to 2.0. . It is desirable that the mechanical treatment is such that pressure and shearing force due to mixing are continuously applied for a certain period of time.

For the mixing treatment, it is preferable to use a grinding device such as a vibrating ball mill, a rotating ball mill, a planetary ball mill, a roll mill, a media mill, a disk mill, a high-speed mixer using high-speed rotating blades, a homomixer, etc., and a planetary ball mill is particularly preferable. The treatment method is preferably a dry treatment without using a solvent. In addition, 3-20G, Preferably 5-15G is suitable for the energy applied in the case of processing (in the case of a planetary ball mill, the gravitational acceleration given in a planetary ball mill).

The timing for adding the flattening aid and the powder having a refractive index of 1.4 to 2.0 to the cellulosic material may be any time before the mixing treatment. As for the addition method, the flattening aid and the powder having a refractive index of 1.4 to 2.0 may be added simultaneously or separately. Further, as a method for adding the flattening aid, it may be dissolved in a suitable solvent and then added to the cellulosic material. Examples of the solvent used for dissolving the flattening aid include alkanes such as hexane, alcohols such as ethanol, ketones such as acetone, ethers such as tetrahydrofuran, aromatic hydrocarbons such as toluene, and the like.

Further, in the flat cellulose composite powder of the present invention, its particle size, thickness, and flatness (aspect ratio) are important. Since the amount of adhering powder, the particle size, and the shape of the .0 powder vary depending on the mixing time, the mixing time must be determined in consideration of these factors.

The cellulosic material as the raw material is put into an alumina or zirconia pulverized container that can be sealed together with alumina or zirconia pulverized balls. A flattening aid and powder having a refractive index of 1.4 to 2.0 are added. Then, the said crushing container is installed in a planetary ball mill, and a mixing process is performed at a rotational speed of 100 to 250 rpm. Mixing may be performed for 5 to 15 minutes, mixing for 5 to 15 minutes as one cycle, continuously repeated for about 2 to 72 cycles, or continuously for about 5 to 120 minutes without stopping. May be.

After the mixing treatment, moisture and the like attached to the flat cellulose composite powder may be removed by a known drying means such as air drying, hot air drying, vacuum drying, and reduced pressure drying.

Moreover, when using powder with a refractive index of 2.0 to 3.1 (excluding the case of 2.0) as a coating component, in the above-described manufacturing method, a refractive index of 1.4 to 2.0 is used. The powder and the powder having a refractive index of 2.0 to 3.1 (except when the refractive index is 2.0) may be processed at the same time to form a surface coating, or the coating with each component is a separate step. As a multi-step process, a surface coating composed of a plurality of layers having a powder having a refractive index of 1.4 to 2.0 as a surface layer may be formed. Further, one or both of powder having a refractive index of 1.4 to 2.0 and powder having a refractive index of 2.0 to 3.1 (excluding cases where the refractive index is 2.0) includes two or more layers. As a thing, you may form the surface coating which consists of three or more layers. Furthermore, a coating layer made of components other than those described above may be separately provided.

In the present invention, a method in which a powder having a refractive index of 1.4 to 2.0 and a powder having a refractive index of 2.0 to 3.1 (excluding cases where the refractive index is 2.0) is used in combination (Method 1). ) Or a powder with a refractive index of 2.0 to 3.1 (except for the case of 2.0) as the first stage, and then with a refractive index of 1.4 to 2.0 in the second stage. A method of performing treatment with powder (Method 2) is preferred.
By using the processing methods 1 and 2 as described above, it is preferable in that a natural finish such as bare skin can be obtained while adequately hiding uneven color and unevenness.

First, treatment with powder having a refractive index of 1.4 to 2.0, followed by treatment with powder with a refractive index of 2.0 to 3.1 (except for the case of 2.0), Since the surface layer is coated with the powder on the high refractive index side, the hiding power is increased and it may be difficult to obtain a natural unevenness correction effect with the powder having a refractive index of 1.4 to 2.0.

When the treatment is performed by the method 2, the treatment with the powder having a refractive index of 2.0 to 3.1 (excluding the case where the refractive index is 2.0) is the same as the powder having the refractive index of 1.4 to 2.0. A similar method can be used. In addition, when performing the process in two steps by the method 2 described above, it is desirable to use a flattening aid in the first step, but in the second step, an additional flattening aid is added. Even if it processes only with what was added to the 1st step, either may be sufficient.

And since this flat cellulose composite powder also has the smooth feeling of use originally possessed by the flat cellulose powder, the cosmetic compounded with this has the characteristic of spreading and spreading smoothly on the skin. It is also excellent in the effect of inconspicuously correcting unevenness of skin such as pores and small wrinkles, and creates a highly transparent finish. Such cosmetics are also one aspect of the present invention.

The preparation of the cosmetic containing the flat cellulose composite powder of the present invention is performed by combining it with a suitable cosmetic base and formulating it. For example, when the cosmetic is a powder cosmetic, the flat cellulose composite powder of the present invention is used in place of a part or all of the conventional powder components in the same production method as the conventional powder cosmetic. Can be used. In addition, the compounding quantity of the flat cellulose composite powder in the said cosmetics is 1-99 mass%. The lower limit is more preferably 3% by mass, and still more preferably 5% by mass. The upper limit is more preferably 95% by mass, and still more preferably 90% by mass.

In the cosmetic of the present invention, powder components generally used in cosmetics can be blended. Specific examples include bengara, yellow iron oxide, black iron oxide, mica titanium, iron oxide coated mica titanium, titanium oxide coated glass flakes and other bright colored pigments, mica, talc, kaolin, sericite, titanium dioxide, zinc oxide. Examples thereof include inorganic powders such as silica and organic powders such as polyethylene powder, nylon powder, crosslinked polystyrene, and silicone powder. Preferably, a part or all of the powder component is hydrophobized by a known method with a substance such as silicones, fluorine compounds, metal soaps, oils, acyl glutamates in order to improve sensory characteristics and cosmetic durability. Used.

Moreover, in the cosmetics of this invention, the oil-based component generally used for cosmetics can be mix | blended. Examples of such oil components include fats and oils, waxes, hardened oils, hydrocarbons, ester oils, fatty acids, higher alcohols, silicone oils, and the like.

In the cosmetic of the present invention, other components generally used in cosmetics, for example, aqueous components such as polyhydric alcohols, surfactants, medicinal components, flavoring agents, refreshing agents, ultraviolet absorbers, ultraviolet scattering Agents, suspending agents, stabilizers, wetting agents, antioxidants, pH adjusting agents, viscosity adjusting agents, coloring agents, preservatives and the like may be blended. The addition timing of these components is not particularly limited.

The cosmetic obtained by the above method can be suitably used as a makeup cosmetic, and more specifically, for example, can be used as a foundation, white powder, blusher, eye shadow, eyebrow, or the like.

The flat cellulose composite powder of the present invention is obtained by combining a powder having a refractive index of 1.4 to 2.0 on flat cellulose as shown in FIG. 2 is confirmed to be a flat cellulose powder with a powder having a refractive index of 1.4 to 2.0, which is not observed in the powder having a refractive index of 1.4 to 2.0 shown in FIG. . From this result, it is surmised that the flat cellulose composite powder of the present invention has transparency and unevenness correction effect by appropriately transmitting and scattering visible light.

Moreover, the flat cellulose composite which processed simultaneously the powder of refractive index 1.4-2.0 shown in FIG. 4, and the powder of refractive index 2.0-3.1 (except the case where it is 2.0). The powdered powder has a refractive index of 2.0 to 3.1 (except when it is 2.0) with a refractive index of about 0.2 μm and a powder with a refractive index of 1.4 to 2.0 that is 3 μm or less randomly attached. Confirmed to be a flattened cellulose powder. From this result, in addition to the function of the flat cellulose obtained by combining only the powder having a refractive index of 1.4 to 2.0 in FIG. 3, it is presumed to have a natural hiding power.

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these examples.

Prior to the examples, the test method and evaluation method used in the present invention will be described.
(1) Measurement of average particle diameter The average particle diameters of the powders of Production Examples 1 to 7 and Production Comparative Examples 1 and 2 were measured on a flow cell using a laser diffraction / scattering type particle size distribution measuring apparatus (Horiba: LA-920). And measured in a dispersed state in ethanol. The average particle size was determined as the average value of the particle width and length on the apparatus. As the average particle size, a particle size value with an integrated volume of 50% was used. In addition, the particle size distribution measurement was performed after dropping a suspension in which 50 mg of powder was dispersed in 10 mL of ethanol into a sample circulation tank using ethanol as a medium of a particle size distribution measurement device to obtain an appropriate concentration.

(2) Measurement of average thickness and flatness The surface states of the powders of Production Examples 1 to 7 and Production Comparative Examples 1 and 2 were observed with a scanning electron microscope to determine the shape, average thickness, and flatness of the particles. evaluated. The average thickness of the particles was determined by selecting a plurality of particles having a size equivalent to the average particle size obtained above, measuring the thickness, and averaging them. The flatness was obtained by dividing the average particle diameter by the average thickness (average particle diameter / average thickness).

(3) Sensory evaluation of powder foundation
20 professional cosmetics evaluation panels use the cosmetics of Examples 1 to 7 and Comparative Examples 1 to 4, smoothness during use, transparency when finished, conspicuous unevenness of skin, and skin Each of them was evaluated in five levels according to the following evaluation criteria for the difficulty of conspicuous color unevenness, given a score for each cosmetic, and the average score of all panels was determined according to the following four criteria.

(Evaluation criteria)
Evaluation result: Score very good: 5 points good: 4 points Normal: 3 points Somewhat bad: 2 points bad: 1 point (Criteria)
Average score: Judgment 4.5 or higher: ◎
3.5 or more and less than 4.5: ○
1.5 or more and less than 3.5: △
Less than 1.5: ×

(Production Example 1)
Production of lauroyl lysine-treated silica complexed flat cellulose powder:
As a starting material, purified wood-derived cellulose powder (KC Flock W-400G manufactured by Nippon Paper Chemicals Co., Ltd.) was used. First, 78 parts by mass of cellulose powder from which adsorbed moisture has been sufficiently removed to 0.1% or less by drying under reduced pressure is put into an alumina crushing vessel that can be sealed together with alumina crushing balls, and further lauroyl lysine (Amihop LL Ajinomoto). 2 parts by mass and 20 parts by mass of silica (Silicia 730, manufactured by Fuji Silysia) (average particle size: 4.0 μm) were added. Thereafter, using a planetary ball mill (manufactured by Sansho Industry Co., Ltd.) and mixing at a rotation speed of 220 rpm (energy of about 15 G (gravity acceleration)) for 40 minutes, lauroyl lysine-treated silica complexed flat cellulose powder (manufacturing) Example 1) was obtained.

The average particle diameter of the lauroyl lysine-treated silica-combined flat cellulose powder obtained in Production Example 1 was 15.0 μm, the average thickness was 1.6 μm, and the flatness was 9.4. The shape of the silica was irregular and the particle size was 3 μm or less. The particle diameter of the silica is a value obtained by measuring the long diameter of the maximum particle diameter in the image. Hereinafter, the particle diameters of the amorphous particles are all values measured according to the standard.
An observation image by a scanning electron microscope is shown in FIG. In addition, FIG. 2 shows an observation image of silica, which is a raw material used in the treatment, by a scanning electron microscope.

(Production Example 2)
In the same production method as in Production Example 1, 2 parts by mass of lauroyl lysine and 40 parts by mass of silica were added to 58 parts by mass of cellulose powder from which adsorbed moisture had been sufficiently removed to 0.1% or less.
The average particle diameter of the lauroyl lysine-treated silica-combined flat cellulose powder obtained in Production Example 2 was 13.8 μm, the average thickness was 1.7 μm, and the flatness was 8.1. The shape of the silica was irregular and the particle size was 3 μm or less.

(Production Example 3)
In the same manner as in Production Example 1, spherical polymethyl methacrylate (average particle size 0.4 μm) was added instead of silica.
The average particle diameter of the lauroyl lysine-treated polymethyl methacrylate complexed flat cellulose powder obtained in Production Example 3 was 13.6 μm, the average thickness was 1.3 μm, and the flatness was 10.5. The polymethyl methacrylate had a spherical shape that was crushed and had a particle size of 0.45 μm. In addition, the said particle diameter is the value which measured the diameter of the disk.

(Production Example 4)
In the same production method as in Production Example 1, plate-like barium sulfate (average particle size: 7 μm) was added instead of silica.
The average particle diameter of the lauroyl lysine-treated barium sulfate-complexed flat cellulose powder obtained in Production Example 4 was 14.6 μm, the average thickness was 1.3 μm, and the flatness was 11.2. The shape of barium sulfate was irregular and the particle size was 2 μm or less.

(Production Example 5)
In the same manner as in Production Example 1, spherical polymethylsilsesquioxane (average particle size 0.5 μm) was added instead of silica.
The average particle diameter of the lauroyl lysine-treated polymethylsilsesquioxane-complexed flat cellulose powder obtained in Production Example 5 was 16.6 μm, the average thickness was 1.2 μm, and the flatness was 13.8. The polymethylsilsesquioxane had a spherical shape and a particle size of 0.5 μm. The particle diameter is a value obtained by measuring the diameter of a sphere. The particle size distribution was in order, and almost all of the particles were in the vicinity of this particle size.

(Production Example 6)
In the same manner as in Production Example 1, spherical calcium carbonate (average particle size 5 μm) was added in place of silica.
The average particle diameter of the lauroyl lysine-treated calcium carbonate composited flat cellulose powder obtained in Production Example 6 was 14.8 μm, the average thickness was 1.6 μm, and the flatness was 9.3. The shape of calcium carbonate was irregular and the particle size was 3 μm or less.

(Production Example 7)
In the same production method as in Production Example 1, 2 parts by mass of lauroyl lysine, 6 parts by mass of silica, titanium oxide (average particle It was manufactured by adding 14 parts by mass (diameter: 0.25 μm).
The average particle diameter of the lauroyl lysine-treated silica and titanium oxide composite flat cellulose powder obtained in Production Example 7 was 18.5 μm, the average thickness was 1.2 μm, and the flatness was 15.4. The shape of the silica was irregular and the particle size was 3 μm or less. The shape of the titanium oxide was granular and the particle size was 0.5 μm or less.

(Production Comparative Example 1)
Production of lauroyl lysine-treated flat cellulose powder / silica mixture:
As a starting material, purified wood-derived cellulose powder (KC Flock W-400G manufactured by Nippon Paper Chemicals Co., Ltd.) was used. First, 78 parts by mass of cellulose powder from which adsorbed moisture has been sufficiently removed to 0.1% or less by drying under reduced pressure is put into an alumina crushing vessel that can be sealed together with alumina crushing balls, and further lauroyl lysine (Amihop LL Ajinomoto). 2 parts by mass) was added. Then, using a planetary ball mill (manufactured by Sansho Industry Co., Ltd.), grinding was performed for 40 minutes at a rotational speed of 220 rpm (energy of about 15 G (gravity acceleration)) to obtain a lauroyl lysine-treated flat cellulose powder. An observation image of the lauroyl lysine-treated flat cellulose powder by a scanning electron microscope is shown in FIG. 80 parts by mass of the obtained lauroyl lysine-treated flat cellulose powder and 20 parts by mass of silica (manufactured by Silicia 730 Fuji Silysia) were mixed for 40 minutes with a Henschel mixer, and lauroyl lysine-treated flat cellulose powder / silica mixture (production comparison) Example 1) was obtained.

For the powder obtained in Production Comparative Example 1, the average particle diameter, thickness and flatness were measured in the same manner as in Production Example 1. The average particle diameter was 16.7 μm and the average thickness was 0.9 μm. The mixture of a flat cellulose powder having a flatness (average particle diameter / average thickness) of 18.6 and silica having an average particle diameter of 4.0 μm.

(Production Comparative Example 2)
In the same manner as in Production Example 1, titanium oxide (average particle size 0.25 μm) was added instead of silica.
The average particle diameter of the lauroyl lysine-treated titanium oxide composited flat cellulose powder obtained in Production Comparative Example 2 was 17.2 μm, the average thickness was 1.5 μm, and the flatness was 11.5. The shape of the titanium oxide was granular and the particle size was 1 μm or less.

(Examples 1-7, Comparative Examples 1-4)
Formulation of flat cellulosic powder (Production Examples 1 to 5, 7 and Production Comparative Examples 1 and 2) into a powder foundation (Table 1) and (Table 2):
The flat cellulosic powders produced in Production Examples 1 to 5 and 7 and Production Comparative Examples 1 to 2 were blended, and powder foundations having the compositions of Examples 1 to 7 in Table 1 and Comparative Examples 1 to 4 in Table 2 were prepared. Prepared by the following method. These powder foundations were evaluated in terms of smoothness during use, transparency when finished, difficulty in conspicuous skin irregularities, and difficulty in conspicuous skin color unevenness, and are shown in Tables 1 and 2.

(Production method of powder foundation; Examples 1 to 7 and Comparative Examples 1 to 4)
A. Oil components 20 to 23 are heated and dissolved at 75 ° C. and uniformly dispersed.
B. Disperse powder components 1-19 uniformly with a Henschel mixer.
C. A is added to B and dispersed uniformly.
D. C was filled into a metal pan and compression molded to obtain a powder foundation.

As is clear from Tables 1 and 2, the powder foundations of the present invention (Examples 1 to 7) are smooth and smooth when used, transparent when finished, inconspicuous unevenness of skin, and uneven skin color. Very inconspicuous.

Example 8: Solid white powder (1) Lauroyl lysine-treated silica composite flat cellulose powder (20% composite)
70.0
(2) Acylglutamate 3.5% treated talc (* 9) Remaining amount (3) Acylglutamate 3.5% treated titanium oxide (70%) / talc (30%) mixture
(* 10)
3.0
(4) Acetic acid glutamate 3.5% treated bengara 0.1
(5) Acyl glutamate 3.5% treated yellow iron oxide 0.2
(6) Acyl glutamate 3.5% treated black iron oxide 0.05
(7) Acryl glutamate 3.5% treated ultramarine 0.05
(8) Zinc myristate (* 11) 5.0
(9) Hydrogenated polydecene (* 8) 1.0
(10) Dimethicone (20cs) 2.0
(11) Isononyl isononanoate 1.0
* 9 NAI-Talc JA-46R (Miyoshi Kasei)
* 10 NAI-Titanium CR-50 (70%) (Miyoshi Kasei)
* 11 Powder base M (Nippon Yushi Co., Ltd.)
(Manufacturing method) The solid white powder was obtained by the method similar to the said Examples 1-7 and Comparative Examples 1-4.

Example 9: Blusher (1) Lauroyl lysine-treated calcium carbonate complexed flat cellulose powder (20% complex)
15.0
(2) Dimethicone 2.0% treated talc (* 2) 30.0
(3) Dimethicone 2.0% -treated synthetic phlogopite (* 12) Remaining amount (4) Dimethicone 2.0% -treated titanium oxide (80%) / talc (20%) mixture (* 3)
1.0
(5) Dimethicone 2.0% treated Bengala 3.0
(6) Dimethicone 2.0% treated red 226 0.5
(7) Dimethicone 2.0% treated yellow iron oxide 3.0
(8) Dimethicone 2.0% treated black iron oxide 0.3
(9) Dimethicone 2.0% treated mica titanium (* 13) 4.0
(10) Boron nitride 1.0
(11) (Dimethicone / Vinyl Dimethicone) Cross Polymer 1.0
(12) Diisostearyl malate 1.0
(13) Hydrogenated polydecene (* 8) 3.0
(14) Dimethicone (20 cs) 4.0
(15) Isononyl isononanoate 1.0
* 12 SA-Synthetic Mica 9WB (Miyoshi Kasei)
* 13 SA-Timilon MP-115 (Miyoshi Kasei)
(Production Method) A blusher was obtained in the same manner as in Examples 1 to 7 and Comparative Examples 1 to 4.

Example 10: Eyeshadow (1) Lauroyl lysine-treated calcium carbonate complexed flat cellulose powder (20% complex)
30.0
(2) Dimethicone 3.0% treated mica (* 1) Remaining amount (3) Dimethicone 2.0% treated Bengala 0.8
(4) Dimethicone 2.0% treated red 226 0.2
(5) Dimethicone 2.0% treated yellow iron oxide 3.0
(6) Dimethicone 2.0% treated black iron oxide 4.0
(7) Dimethicone 2.0% treated Bengala coated titanium mica (* 14) 20.0
(8) Dimethicone 2.0% treated mica titanium (* 15) 8.0
(9) Lauroyl lysine (* 16) 3.0
(10) Vaseline 2.0
(11) Hydrogenated polydecene (* 8) 3.0
(12) Dimethicone (20cs) 5.0
(13) Isononyl isononanoate 1.0
* 14 SA-Croise Gold (Miyoshi Kasei)
* 15 SA-Timilon Super Green (Miyoshi Kasei)
* 16 Amihope LL (Ajinomoto Co.)
(Manufacturing method)
A to C were carried out in the same manner as in Examples 1 to 7 and Comparative Examples 1 to 4.
D. 80 parts by mass of purified water is added to 100 parts by mass of the C cosmetic base, and the mixture is uniformly mixed to form a slurry.
E. D is filled in a resin dish and compression molded with a water absorbing sheet interposed.
F. E was allowed to stand in a constant temperature bath at 70 ° C. overnight, and purified water was completely removed to obtain an eye shadow.

Example 11: Eyebrow (1) Lauroyl lysine-treated silica composite flat cellulose powder (20% composite)
30.0
(2) Dimethicone 2.0% treated talc (* 2) Remaining amount (3) Dimethicone 2.0% treated Bengala 6.0
(4) Dimethicone 2.0% treated yellow iron oxide 4.0
(5) Dimethicone 2.0% treated black iron oxide 15.0
(6) Dimethicone 2.0% treated ultramarine 3.0
(7) Dimethicone 2.0% treatment Titanium dioxide (80%) and talc (20%) mixed products (* 3)
10.0
(8) Vaseline 1.0
(9) Hydrogenated polydecene (* 8) 3.0
(10) Dimethicone (20cs) 4.0
(Production method) Eyebrows were obtained in the same manner as in Examples 1-7 and Comparative Examples 1-4.

Example 12: Powder foundation (1) Dimethicone 2.0% treated Bengala 0.66
(2) Dimethicone 2.0% treated yellow iron oxide 2.40
(3) Dimethicone 2.0% treated black iron oxide 0.24
(4) Dimethicone 3.0% treated mica (* 1) Remaining amount (5) Lauroyl lysine treated silica (6%), titanium oxide (14%) composite flat cellulose powder produced in Production Example 7 70.00
(6) Dimethicone 2.0% treatment Titanium oxide (80%) and talc (20%) mixed product (* 3)
2.00
(7) Methylone 2.0% treatment Fine particle titanium oxide (* 4) 1.50
(8) Hydrogen Dimethicone 4.0% Treatment Fine Zinc Oxide (* 5) 1.50
(9) Lauroyl lysine (* 16) 5.00
(10) (Diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) crosspolymer 5.00
(11) Vaseline 1.00
(12) Hydrogenated polydecene (* 8) 3.00
(13) Dimethicone (20cs) 4.00
(14) Isononyl isononanoate 1.00
(Production Method) A powder foundation was obtained in the same manner as in Examples 1-7 and Comparative Examples 1-4.

The flat cellulose composite powder of the present invention can be suitably used as a compounding ingredient in makeup cosmetics such as foundation, white powder, blusher, eye shadow, and eyebrow.

Claims (8)

A flat cellulose composite powder characterized by having a surface coating with a powder having a refractive index of 1.4 to 2.0 on a base material powder made of a cellulosic material. Surface coating with powder having a refractive index of 1.4 to 2.0 and powder having a refractive index of 2.0 to 3.1 (except for a case of 2.0) on a base material powder made of a cellulosic material. A flat cellulose composite powder characterized by comprising: The flat cellulose composite powder according to claim 1 or 2, wherein the raw material cellulosic material, the flattening aid and the raw material powder having a refractive index of 1.4 to 2.0 are mechanically mixed. . The flat cellulose composite powder according to claim 1, 2 or 3, having an average particle size of 1 to 50 µm, an average thickness of 0.1 to 10 µm, and a flatness of 4 to 200. 5. The method according to claim 1, comprising a step of mechanically mixing a cellulose material as a raw material, a flattening aid and a raw material powder having a refractive index of 1.4 to 2.0. The manufacturing method of flat cellulose composite powder of description. Cellulosic material as a raw material, flattening aid, raw material powder having a refractive index of 1.4 to 2.0, and raw material powder having a refractive index of 2.0 to 3.1 (except when 2.0) 5. The method for producing a flat cellulose composite powder according to claim 2, 3 or 4, comprising a step of mechanically mixing the powder. A step (1) and a step (1) of mechanically mixing a raw material cellulose material, a flattening aid, and a raw material powder having a refractive index of 2.0 to 3.1 (excluding the case of 2.0). 5. The flat structure according to claim 2, comprising a step of mechanically mixing the powder obtained in 1) and the raw material powder having a refractive index of 1.4 to 2.0. For producing a cellulose composite powder. Cosmetics which mix | blended the flat cellulose composite powder in any one of Claims 1-4.