JP2003104840A - Degradable spherical boron nitride particle and method for producing the particle and cosmetic containg the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide degradable spherical boron nitride particles which has an excellent fluidity and an excellent handleability and is degraded by rubbing when used, to provide a method for producing the same, and to provide cosmetics which contain the particles, gives finished gloss, has excellent extensi bility on the skin, and an excellent feeling of use, does not caking, and has good transferability to the skin and coating members such as small tools. SOLUTION: This degradable spherical boron nitride particle consisting essentially of a boron nitride plate having an average plate thickness of 1 to 20 μm and inorganic powder having an average particle diameter of 0.01 to 0.5 μm. The method for producing the particles. The cosmetic containing the same is also provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to collapsible spherical boron nitride particles, a method for producing the particles, and a cosmetic containing the particles. More specifically, it has excellent fluidity and handleability, and has disintegrating spherical boron nitride particles that disintegrate due to a rubbing operation during use and a blend of the particles, which has a glossy finish as a texture and spreads to the skin and The present invention relates to a cosmetic which is excellent in feeling of use, has no caking, and has good transferability to applicators such as props and the skin.

[0002]

2. Description of the Related Art Conventionally, in various cosmetics such as makeup cosmetics such as lipsticks, the texture, and in particular, the glossy finish is one of the important quality characteristics, and various cosmetics are used to improve them. Attempts have been made. As one of means for improving the glossiness of the finish, boron nitride has been blended with various cosmetics such as makeup cosmetics.

The boron nitride used in this cosmetic is
It is a plate-like or flat powder, which has excellent gloss and gloss after application and is excellent in that it can give a uniform decorative film excellent in adhesion.
Although it had a sliding feel due to its shape, it was difficult to obtain smooth spreadability. Further, in the case of a solid powdery cosmetic containing a large amount of an oil agent, a so-called caking phenomenon may occur during use, and the transferability to a coated article such as a small tool or the skin may be deteriorated.

For this reason, this boron nitride is spheroidized (Japanese Patent Laid-Open No. 2-296706, Japanese Patent Laid-Open No. 2000-3273).
No. 12, JP-A-2000-122615, etc.) and attempts to modify the surface have been made, but these have not been sufficient as means for solving the problem. In particular, when the boron nitride has a spherical shape by the conventional technique, the fluidity is improved, but on the other hand, the adhesion after application is poor and the uniformity of the finished film after makeup is impaired. There was a problem.

[0005]

Therefore, while making use of the texture of the boron nitride, such as the glossy finish, when blended in a cosmetic or the like, the transferability to an application body and the spread to the skin are excellent, Further, it has been desired to develop a boron nitride powder capable of forming a cosmetic film that has good adhesion to the skin, is uniform, adheres well, and has a good finished state.

[0006]

In view of the above situation, the inventors of the present invention have made diligent studies, and as a result, have constituted plate-like boron nitride having a constant shape and inorganic powder having a constant average particle diameter as essential components. It was found that the formed spherical particles collapse and return to the original plate-shaped boron nitride by an appropriate pressure such as pressing with a finger.
Then, by adding the spherical powder to a cosmetic,
It acts as spherical particles during filling and application to cosmetics, and gives a smooth and light spreading / spreading.After that, when it is rubbed with a finger or the like, it collapses and changes into plate-like particles, which gives gloss to cosmetics. The present invention has been completed based on the finding that it can give a feeling and a more excellent adhesion and can give a uniform cosmetic film.

That is, the present invention has an average plate diameter of 1 to 20 μm.
Disclosed is a collapsible spherical boron nitride particle composed of m plate-shaped boron nitride and inorganic powder having an average particle diameter of 0.01 to 0.5 μm as essential components, and a method for producing the same.

The present invention also provides a cosmetic containing the above-mentioned disintegratable spherical boron nitride particles.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The collapsible spherical boron nitride particles of the present invention (hereinafter referred to as "spherical particles of the present invention") have an average plate diameter of 1
~ 20μm plate-like boron nitride and average particle size 0.01 ~ 0.5
It is a spherical composite particle composed of an inorganic powder of μm as an essential component, and has a particle disintegration strength such that it disintegrates with a relatively weak force such as a finger.

The plate-like boron nitride (hereinafter referred to as "plate-like boron nitride") used in the spherical particles of the present invention has a plate-like or flat shape having an average plate diameter in the range of 1 to 20 μm as described above. It is a thing. Here, the "average plate diameter" indicates the average value of the long side and the short side of the plate-shaped boron nitride. Generally, the thickness of this plate-shaped boron nitride is preferably about 0.1 to 0.5 μm. As such plate-like boron nitride, for example, hexagonal boron nitride which has been conventionally used in cosmetics and the like can be used.

Further, the inorganic powder having an average particle diameter of 0.01 to 0.5 μm (hereinafter referred to as “inorganic powder”) used for the spherical particles of the present invention binds the plate-like boron nitrides together during sintering. It has an action as a binding agent. Examples of such inorganic powders include anhydrous silicic acid, aluminum oxide, aluminum hydroxide, titanium oxide, zinc oxide, zirconium oxide, boron nitride and the like, and one or more of these may be used. it can. Of these inorganic powders, boron nitride powder is preferable because it has excellent sinterability, the binding effect of the plate-shaped boron nitride is enhanced, and the disintegration property is easily controlled.

The content ratio of the plate-like boron nitride and the inorganic powder in the spherical particles of the present invention is 95: 5 to 40: 6 by mass ratio.
It is preferably in the range of 0. Within this range, the spherical particles can be disintegrated by a light force of a finger or the like to be changed into plate-like particles, and gloss and luster that are preferable for cosmetics can be exhibited.

To prepare spherical particles using the plate-like boron nitride and the inorganic powder, the following method can be used, for example. First, the plate-like boron nitride powder and the inorganic powder are uniformly dispersed in one or more dispersion solvents such as water, ethanol, isopropyl alcohol, acetone, etc., and if necessary, a polymer binder is added, and further homogenized. Disperse into a slurry.

Examples of the polymer binder used for preparing the spherical particles of the present invention include polyvinyl alcohol, gum arabic, polyethylene glycol, ethyl cellulose and the like, and these polymer binders are added to the entire particles of the present invention. On the other hand, 0.1 to 5 mass% (hereinafter, simply referred to as "%")
It is preferable to contain it.

Next, the above-mentioned slurry is spheroidized. For this spheroidizing treatment, a generally known granulation method, for example, a spray drying method (spray drying method) or a fluidized bed granulation method can be used, but if the spray drying method is used, the components can be spheroidized aesthetically. Therefore, it is preferable.

Finally, the spheroidized particles are sintered using a heat treatment furnace or the like. Sintering is performed in an atmosphere of an inert gas such as nitrogen or argon. The firing temperature is 1000-2
It is preferably carried out at 200 ° C, more preferably 1800 to 2200 ° C. The time required for this sintering is about 5 to 15 hours.

By this sintering, spherical particles are obtained, and at the same time, impurities in the spherical particles due to the raw material and the granulation process are removed. For example, the elution amount of boron resulting from the plate-shaped boron nitride can be significantly reduced to 20 ppm or less, and safety as a raw material for cosmetics can be improved.

The spherical particles thus obtained are those in which plate-shaped boron nitrides are bonded together through an inorganic powder, and when the spherical particles are further partially sintered and the particles become coarse. There is. However, since such a bond is weak, it can be easily dispersed by a crusher or the like. Further, the obtained spherical particles can be used after classification if necessary.

The average particle size of the spherical particles is not particularly limited, but there is no easiness of spheroidizing at the time of production, uniform mixing with other components, and no uncomfortable feeling to the skin after blending into cosmetics. From the viewpoint of the above, the thickness is preferably about 5 to 100 μm, more preferably about 10 to 70 μm.

The spherical particles of the present invention have the property of disintegrating when pressed as described above, and their disintegration strength is the cosmetic props such as fingers, mats and sponges on human skin. The strength is such that it disintegrates under pressure such that it is rubbed with.

The particle disintegration strength of the spherical particles of the present invention is, specifically, a certain number of particles are evenly dispersed on a slide glass, a flat indenter is placed on the particles, and a predetermined load is applied to the indenter. It is obtained as a load value when the particles are completely disintegrated by observing the disintegration state of the particles with a microscope or the like.

The particle disintegration strength of the spherical particles of the present invention is 1000 to 5000 when it is supposed to be added to cosmetics.
It is preferably 0 Pa, and particularly 1000 to 3000.
It is more preferable than 0 Pa. Within this range, the cosmetic film does not disintegrate at the time of producing the cosmetic composition, and easily disintegrates by rubbing on the skin to be converted into plate-like particles, so that a more excellent adhesion and a uniform cosmetic film can be obtained.

The spherical particles described above can exert excellent effects by being mixed with cosmetics. The content of the spherical particles in the cosmetic is affected by the type of cosmetic, the dosage form, etc., but is preferably 0.1 to 70%, and particularly preferably 1 to 40% with respect to the entire cosmetic. When the content in the cosmetic is within this range, a smooth and light spread is obtained at the time of use, and when applied, it disintegrates and changes into plate-like particles, giving a glossy finish and the like.
It is a cosmetic with excellent spreadability on the skin and feeling in use. Further, the cosmetics themselves do not have caking, and have good transferability to the applicator such as props and the skin.

In addition to the above-mentioned spherical particles, the cosmetics of the present invention are usually powders, oils, aqueous components, surfactants, water-soluble polymers in addition to the above spherical particles, as long as they do not impair the effects of the present invention. Ingredients commonly used in cosmetics such as the above can be added.

Of these, powders that are usually used in cosmetics can be used, such as spherical, plate-shaped, spindle-shaped, needle-shaped and the like, fumes, fine particles, pigment grade, etc. It is not particularly limited by the particle size, the particle structure such as porous and non-porous, and the like, and examples thereof include inorganic powders, glittering powders, organic powders, pigment powders, and composite powders. . Specifically, titanium oxide, low-order titanium oxide, turmeric, ultramarine, red iron oxide, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, silicic acid anhydride, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate, oxidation Chromium, chromium hydroxide, carbon black, aluminum silicate, magnesium silicate, magnesium aluminum silicate, mica,
Synthetic fluoromica, Synthetic fluorophlogopite, Synthetic sericite,
Inorganic powders such as sericite, talc, kaolin, silicon carbide, barium sulfate, flat boron nitride, bismuth oxychloride, titanium mica, iron oxide coated mica, iron oxide mica titanium, organic pigment treated mica titanium, metal oxide Coated glass flakes, aluminum powder, glitter powder such as lame, nylon powder, polymethylmethacrylate powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, wool powder, silk powder, Crystalline cellulose, organic powders such as N-acyl lysine, organic tar pigments, pigment powders such as lake pigments of organic dyes, titanium dioxide mica coated with fine particles of titanium, titanium mica coated with fine particles of zinc oxide, titanium mica coated with barium sulfate, Titanium oxide Containing silicon dioxide, include composite powders such as zinc oxide-containing silicon dioxide, it can be used alone or in combination of two or more thereof. It should be noted that these powders can be used after being treated with a generally known surface treatment agent such as a silicone compound, a fluorine compound, oils and fats, waxes, surfactants, lecithin, and acylamino acid.

As the oil agent, oils usually used in cosmetics can be used, such as the origins of animal oils, vegetable oils, synthetic oils, solid oils, semi-solid oils, liquid oils, volatile oils and the like. Hydrocarbons, oils and fats, waxes, hardened oils, ester oils, fatty acids, higher alcohols, silicone oils, fluorine-based oils, lanolin derivatives and the like are listed regardless of their properties. Specifically, hydrocarbons such as liquid paraffin, squalane, petrolatum, paraffin wax, ceresin wax, microcrystalline wax, montan wax, Fischer-Tropsch wax, mokuro,
Oils and fats such as olive oil, castor oil, jojoba oil, mink oil and macadamian nut oil, beeswax, carnauba wax, candelilla wax, wax, wax and wax, cetyl isooctanate, isopropyl myristate, isopropyl palmitate , Octyldodecyl myristate, glyceryl trioctanoate, diglyceryl diisostearate, diglyceryl triisostearate, glyceryl tribehenate, pentaerythritol rosinate, neopentyl glycol dioctanoate,
Cholesterol fatty acid ester, N-lauroyl-L-
Esters such as glutamic acid di (cholesteryl, behenyl, octyldodecyl), higher alcohols such as stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, behenyl alcohol, low polymerization degree dimethyl polysiloxane, high polymerization degree dimethyl poly Siloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane,
Examples thereof include silicones such as octamethylcyclotetrasiloxane, lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin derivatives such as lanolin alcohol, and the like, and one or more of these can be used.

As the aqueous component, in addition to water, lower alcohols such as ethanol and isopropyl alcohol, glycols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol and polyethylene glycol, glycerin, diglycerin, poly Glycerin and other glycerols are listed, and one or more of these can be used.

Examples of the surface active agent include anionic surface active agents, cationic surface active agents, amphoteric surface active agents, nonionic surface active agents, etc., and one or more of these may be used. You can

Among these, as an anionic surfactant,
N-acylglutamic acid, fatty acid soap formed by fatty acid such as stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, oleic acid and 12-hydroxystearic acid and an alkaline substance such as sodium, potassium and triethanolamine Examples thereof include salts, alkyl phosphates, polyoxyalkylene addition alkyl phosphates and the like.

Examples of the cationic surfactant include alkylamine salts and alkyl quaternary ammonium salts. As the amphoteric surfactant, N, N-dimethyl-N-
Alkyl-N-carboxymethylammonium betaine, N, N-dialkylaminoalkylenecarboxylic acid,
N, N, N-trialkyl-N-sulfoalkylene ammonium betaine, N, N-dialkyl-N, N-bis (polyoxyethylene sulfate) ammonium betaine,
2-alkyl-1-hydroxyethyl-1-carboxymethylimidazolinium betaine, lecithin, phospholipid and the like can be mentioned.

Examples of the nonionic surfactant include glycerin fatty acid ester and its alkylene glycol adduct, polyglycerin fatty acid ester and its alkylene glycol adduct, propylene glycol fatty acid ester and its alkylene glycol adduct, sorbitan fatty acid ester and its alkylene. Glycol adduct, sorbitol fatty acid ester and its alkylene glycol adduct, polyalkylene glycol fatty acid ester, polyoxyalkylene alkyl ether, glycerin alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene hydrogenated castor oil, lanolin alkylene glycol addition Fatty acid esters such as food products, dextrin fatty acid esters, sucrose fatty acid esters, starch fatty acid esters, etc. Le, polyoxyalkylene-modified organopolysiloxane, polyoxyalkylene-alkyl co-modified organopolysiloxanes, and the like.

Examples of the water-soluble polymer include guar gum, sclerotium gum, gellan gum, sodium chondroitin sulfate, hyaluronic acid, gum arabic, sodium alginate, carrageenan, xanthan gum, locust bean gum, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxy vinyl. Polymer, alkyl-modified carboxyvinyl polymer,
Examples thereof include polyvinyl alcohol, polyvinylpyrrolidone, and sodium polyacrylate, and one or more of these can be used.

In addition to the above optional components, aqueous gelling agents such as hectorite and smectite, oily gelling agents such as aluminum isostearate and calcium stearate, 2-ethylhexyl paramethoxycinnamate, paradimethylamino. UV absorbers such as ethyl benzoate, 4-tert-butyl-4'-methoxydibenzoylmethane, oxybenzone, antioxidants, preservatives, vitamins such as vitamins A, B6, B12, C, E, chelating agents, Beauty ingredients such as rosemary extract, chamomile extract, carrot extract, senburi extract, catechin, catechin derivative, licorice extract, sophoraceae extract, hop extract, collagen, hyaluronic acid, hyaluronic acid derivative, trehalose, aloe extract, etc., Purification of menthol, camphor, sorbitol, etc. One or more components commonly used in cosmetics such as a cooling agent and a fragrance can be blended.

The cosmetics of the present invention include makeup cosmetics such as foundation, white powder, base material, face color, blusher, concealer, lipstick, eye shadow, eyeliner, mascara, eyebrow, manicure, sunscreen, cream and emulsion. , Skin lotion, beauty essence, skin care cosmetics such as packs, body cosmetics, hair cosmetics, and the like, and particularly when used as makeup cosmetics, the effects of the present invention are remarkably exhibited. Therefore, it is preferable.

The cosmetic of the present invention is in the form of powder,
It may be any of solid powder, oil-in-water emulsion, oil-in-water cream, water-in-oil emulsion, water-in-oil cream, liquid, and gel.

[0036]

The spherical particles of the present invention have appropriate particle disintegration strength and, because they are spherical, have excellent fluidity and handling properties. Then, when a certain pressure or more is applied, it collapses and returns to plate-like boron nitride to exhibit the original characteristics of this, and due to this change, the effect peculiar to the present invention is exhibited.

Further, the cosmetics containing the spherical particles of the present invention make use of the characteristics of the spherical particles described above, and the initial stage of the makeup operation (the stage of applying the cosmetics to a prop such as a mat or sponge).
In the step of spreading the cosmetic on the skin), it acts as spherical particles to give a smooth and light spread, and then in the step of applying a rubbing operation (the step of spreading the cosmetic on the skin, rubbing it in, etc.), Since the spherical particles are disintegrated and converted into plate-like particles, the adhesiveness is excellent and a uniform decorative film can be provided.

Further, the collapsible spherical boron nitride particles of the present invention are spherical before the disintegration and thus have no luster, but after disintegration, they change into plate-like particles, so that they may give a desirable luster and luster to cosmetics. It is possible.

[0039]

EXAMPLES The present invention will be described in more detail with reference to Examples and Test Examples, but the present invention is not limited thereto.

Example 1 Production of collapsible spherical boron nitride particles Plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) 80
0 g and boron nitride powder (average particle size 0.2 μm, oxygen 2.5
%) 200 g was uniformly dispersed in 3 L of water, 20 g of polyvinyl alcohol was added thereto, and further uniformly dispersed to prepare a slurry. Next, this slurry was subjected to spheroidizing treatment by spray drying with stirring to obtain laminated spherical particles having an average particle diameter of 50 μm. Then, the laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 1 of the present invention).

Example 2 Production of collapsible spherical boron nitride particles: 700 g of plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) and boron nitride powder (average particle size 0.2 μm, oxygen 2.5%). ) 300 g of water 3
Evenly disperse in L and add polyvinyl alcohol 20
g was added and further uniformly dispersed to prepare a slurry. Next, this slurry was subjected to spheroidizing treatment by spray drying with stirring to obtain laminated spherical particles having an average particle diameter of 50 μm. The laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 2 of the present invention).

Example 3 Production of collapsible spherical boron nitride particles: 600 g of plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) and boron nitride powder (average particle size 0.2 μm, oxygen 2.5%). ) 400 g of water 3
Evenly disperse in L and add polyvinyl alcohol 20
g was added and further uniformly dispersed to prepare a slurry. Next, this slurry was spray-dried with stirring to be spheroidized to obtain laminated spherical particles having an average particle diameter of 50 μm. The laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 3 of the present invention).

Example 4 Production of collapsible spherical boron nitride particles: 500 g of plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) and boron nitride powder (average particle size 0.2 μm, oxygen 2.5%). ) 500 g of water 3
Evenly disperse in L and add polyvinyl alcohol 20
g is added and further uniformly dispersed to prepare a slurry. Next, this slurry was spray-dried with stirring to be spheroidized to obtain laminated spherical particles having an average particle diameter of 50 μm. The laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 4 of the present invention).

Example 5 Production of collapsible spherical boron nitride particles: 700 g of plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) and boron nitride powder (average particle size 0.2 μm, oxygen 2.5%) ) 300 g of water 3
Evenly disperse in L and add polyvinyl alcohol 20
g is added and further uniformly dispersed to prepare a slurry. Next, this slurry was spray-dried with stirring to be spheroidized to obtain laminated spherical particles having an average particle diameter of 20 μm. The laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 5 of the present invention).

Example 6 Production of collapsible spherical boron nitride particles: 700 g of plate-shaped boron nitride (average plate diameter 9 μm, oxygen 0.5%) and boron nitride powder (average particle size 0.2 μm, oxygen 2.5%) ) 300 g was uniformly dispersed in 3 L of water, 20 g of polyvinyl alcohol was added thereto, and further uniformly dispersed to prepare a slurry. Next, this slurry is spray-dried with stirring to be spheroidized,
Laminated spherical particles having an average particle diameter of 50 μm were obtained. The laminated spherical particles were heat-treated in a nitrogen atmosphere at 2000 ° C. for 10 hours to obtain collapsible spherical boron nitride particles (Product 6 of the present invention).

Example 7 Production of collapsible spherical boron nitride particles: 800 g of plate-shaped boron nitride (average plate diameter 14 μm, oxygen 0.5%) and silicic anhydride powder (average particle size 0.01 to 0.03 μm, 200 g of colloidal silica) is uniformly dispersed in 3 L of water, 20 g of polyvinyl alcohol is added thereto, and further uniformly dispersed to prepare a slurry. Next, this slurry was spray-dried with stirring to be spheroidized to obtain laminated spherical particles having an average particle diameter of 50 μm. The laminated spherical particles were placed in a nitrogen atmosphere at 2000 °
And heat-treated for 10 hours to obtain collapsible spherical boron nitride particles (Invention product 7).

The spray drying was performed according to the following specifications. Apparatus: Spray dryer SD12 type (disk atomizer) (manufactured by Mitsui Mining Co., Ltd.) Conditions: Disk rotation speed = 4000-7000 rpm Hot air inlet temperature: 250 ° C Solvent: Water (slurry solid content concentration: 23 wt%)

Among the collapsible spherical boron nitride particles obtained as described above, the shape of the collapsible spherical boron nitride particles of the product 2 of the present invention was 500 times (× 50) using an electron micrograph.
0) and 5000 times (× 5000). Fifty
A 0-fold electron micrograph is shown in FIG. 1, and a 5000-fold electron micrograph is shown in FIG. In this figure, 1 is collapsible spherical boron nitride particles, 2 is plate-like boron nitride, and 3 is boron nitride powder.

From FIG. 1, it was confirmed that the shape of the collapsible spherical boron nitride particles of the product 2 of the present invention was spherical. Also,
From FIG. 2, it was confirmed that the plate-like boron nitride 2 and the boron nitride 3 were mixed and bonded, and the plate-like boron nitride was laminated in the form of layers as primary particles.

Test Example 1 Measurement of Elution Boron Amount: The elution boron amount of the collapsible spherical boron nitride particles of the products 1 to 7 of the present invention is specified in the column of "boron nitride" in the cosmetic material non-standard component standard. It was measured using the method. The results are shown in Table 1.

Test Example 2 Measurement of particle disintegration strength: Disintegrating spherical boron nitride particles (10 pieces / 1 invention product) were dispersed on a slide glass, and a flat indenter (material: aluminum, area: 3.02). × 10
^-4 m ² ) on top of the particles, load the indenter,
The disintegrated state of the particles was observed with a microscope, and the load value when the particles were completely disintegrated was measured. From this load value, the particle collapse strength (Pa) was calculated by the following formula (I). The results are shown in Table 1.

[0052]

[Formula 1]

(Result)

[Table 1]

As can be seen from the results in Table 1, the product of the present invention 1
Each of the collapsible spherical boron nitride particles of Nos. 7 to 7 had an eluted boron content of 20 ppm or less, and the particle strengths thereof were all in the range of 1,000 to 50,000 Pa.

Example 8 Production of Solid Powder Foundation: Using the formulations shown in Table 2 and the following production methods, solid powder foundations of the invention products 8 to 16 and comparative products 1 to 3 were prepared. About this solid powdery foundation, "removal to a prop (mat)", "smooth spread on the skin",
Each item of "adhesion to skin" and "lustered finish" was evaluated by the following evaluation methods and criteria.
In addition, the "disintegrating spherical zinc oxide / silicic acid composite powder" of component 13 was prepared according to the method described in Example 1 of Japanese Patent No. 2858022, and zinc oxide: silicic acid anhydride 10:
1, the average particle size is 50 μm, and the particle collapse strength is 600 to 70.
It is a powder of 00 Pa.

(Method)

[Table 2]

(Production Method) A. Components (20) to (22) are heated and dissolved. B. Components (1) to (19) are uniformly dispersed. C. Add "A." to "B." and disperse uniformly. D. "C." was crushed and compression-molded on a gold plate to obtain a solid powder foundation.

(Evaluation Method) The solid powder foundations of the products 8 to 16 of the present invention and the comparative products 1 to 3 were used by 20 panelists specializing in cosmetics evaluation, and “removal to a prop (mat)”, “on the skin” Smooth extension and spread in
The four items of "adhesion to skin" and "lustered finish" were rated for each foundation using the following five-level evaluation criteria of 1 to 5 for each foundation. In addition, the average of the scores of all panels was calculated for each foundation, and the evaluation was made according to the following four-stage evaluation criteria. The results are shown in Table 3.

<Evaluation criteria> Usability rating (points) Very good: 5 Good Good: 4 Normal: 3 Somewhat bad: 2 Bad: 1

[0060]

(Result)

[Table 3]

From the results shown in Table 3, the solid powder foundations of the products 8 to 16 of the present invention are "removable on a prop (mat)", "smoothly spread on the skin", "adhesion to the skin", It satisfied all the items of "finished gloss". On the other hand, the solid powder foundations of Comparative Products 1 to 3 could not satisfy all the items.

Example 9 Oil-in-Water Emulsion Foundation: An oil-in-water emulsion foundation was produced by the following formulation and production method.

(Method) Component mass% 1. Cetanol 2 2. Stearic acid 1 3. Glycerin monostearate 0.5 4. Liquid paraffin 6 5. Disintegrating spherical boron nitride particles of the product 3 of the present invention 5 6. Titanium oxide 10 7. Red iron oxide 0.3 8. Yellow iron oxide 1 9. Black iron oxide 0.05 10. Polyoxyethylene monostearate 1 (20 mol) sorbitan 11. Dipropylene glycol 10 12. Triethanolamine 0.2 13. Alkyl-modified carboxyvinyl polymer ^{* 6} 0.1 14. Methyl paraoxybenzoate 0.2 15. Purified water remaining 16. Perfume 0.1 * 6: Carbopole 1342 (BF Goodrich)

(Production Method) A. The components (1) to (4) are melted by heating and kept at 70 ° C. B. Components (6) to (15) are mixed and dispersed, and maintained at 70 ° C. C. Emulsify by adding "B." to "A.". D. "C." is cooled to room temperature, component (5) and component (16) are added and mixed homogeneously. E. "D." was filled in a container to obtain an oil-in-water emulsion liquid foundation.

The oil-in-water type emulsion foundation of Example 9 satisfies all the items of "smooth extension and spread on the skin", "adhesion to the skin", and "lustered finish". It was

Example 10 Water-in-oil solid foundation: A water-in-oil solid foundation was produced by the following formulation and production method.

(Processing method) Component mass% 1. Decamethylcyclopentasiloxane 20 2. Dimethyl polysiloxane ^{* 7} 10 3. Glyceryl trioctanoate 5 4. Polyoxyalkylene-modified silicone ^{* 8} 2 5. Polyoxyalkylene alkyl co-modified silicone ^{* 9} 3 6. Ceresin wax 5 7. Candelilla wax 3 8. Disintegrating spherical boron nitride particles of Inventive product 1 10 9. Titanium oxide 10 10. Bengal 0.3 11. Yellow iron oxide 1 12. Black iron oxide 0.05 13. Dipropylene glycol 10 14. Methyl paraoxybenzoate 0.2 15. Purified water remaining 16. Sodium chloride 0.2 17. Fragrance 0.3 * 7: Silicon KF96A (6cs) (manufactured by Shin-Etsu Chemical Co., Ltd.) * 8: Silicon KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd.) * 9: ABIL EM90 (manufactured by Gold Schmidt)

(Production Method) A. The components (2) to (7) are heated and dissolved. B. Components (1) and (9) to (12) are added to "A." and mixed. C. Mix components (13)-(16). D. While stirring "B.", "C." is added to emulsify. E. Ingredient (8) and ingredient (17) are added to "D." and mixed. F. "E." was heated, poured into a gold plate and cooled to room temperature to obtain a water-in-oil type emulsion solid foundation.

The water-in-oil type emulsified solid foundation of Example 10 was prepared as follows: "removal to a prop (mat)", "smooth spread and spread on skin", "adhesion to skin", "finished gloss" All items of "feel" were satisfied.

Example 11 Oily solid foundation: An oily solid foundation was produced by the following formulation and production method.

(Method) Component mass% 1. Dimethyl polysiloxane ^{* 7} 10 2. Liquid paraffin 15 3. Neopentyl glycol trioctanoate Remaining amount 4. Polyethylene wax (molecular weight 500) 2 5. Ceresin wax 2 6. Dextrin palmitate 2 7. Disintegrating spherical boron nitride particles of the product 2 of the present invention 40 8. Titanium oxide 5 9. Red iron oxide 0.1 10. Yellow iron oxide 0.5 11. Black iron oxide 0.02

(Production Method) A. The components (1) to (6) are heated and dissolved. B. Components (7) to (11) are added to "A." and dispersed. C. "B." was heated, poured into a gold plate and cooled to room temperature to obtain an oily solid foundation.

The oily solid foundation of Example 11 had all of "removal to a prop (mat)", "smooth spread and spread on skin", "adhesion to skin", and "glossy finish". The item was satisfied.

Example 12 Powdery white powder: A powdery white powder was produced by the following formulation and production method.

[0076]   (Direction)       Component mass%     1. Disintegratable spherical boron nitride particles of the product 4 of the present invention 70     2. Mica titanium 5     3. Remaining amount of synthetic phlogopite     4. Ultramarine 0.1     5. Red No. 226 0.05     6. Titanium oxide 1     7. Methyl paraoxybenzoate 0.2

(Production method) A. The components "1." to "7." are mixed uniformly. B. "A." was filled in a container to obtain a powdery white powder.

The powdery white powder of Example 12 satisfied all the items of "smooth spread and spread on the skin", "adhesion to the skin", and "glossy finish".

Example 13 Solid Powder Eyeshadow: A solid powder eyeshadow was produced by the following formulation and production method.

(Method) Component mass% 1. Disintegratable spherical boron nitride particles of the product 5 of the present invention 15 2. Mica titanium 30 3. Remaining amount of synthetic phlogopite 4. Silicone powder ^{* 10} 5 5. Red No. 202 0.5 6. Yellow No. 4 aluminum rake 0.1 7. Titanium oxide 18. Powdered synthetic hydrocarbon wax ^{* 4} 3 9. Methyl paraoxybenzoate 0.2 10. Polybutene 0.5 11. Dimethyl polysiloxane ^{* 5} 3 12. Propylene glycol dicaprate 3 13. Fragrance 0.1 * 4: PRESS-AID-XP (average particle size 3 μm) (manufactured by PRESSERSE) * 5: Silicon KF96 (100 cs) (manufactured by Shin-Etsu Chemical Co., Ltd.) * 10: Trefill E-701 (Toray Dow Corning) (Made by Silicone)

(Production Method) A. Components (1) to (9) are uniformly dispersed. B. The components (10) to (12) are heated and dissolved. C. Add “B.” and component (13) to “A.” and disperse uniformly. D. "C." was crushed and compression-molded on a gold plate to obtain a solid powdery eye shadow.

The solid powdery eye shadow of Example 13 was
"Removal into small chips (chips)", "Smooth extension and spread on the skin", "Adhesion to the skin", "Glossy finish"
It satisfied all the items of.

Example 14 Oily stick lipstick: An oily stick lipstick was produced by the following formulation and production method.

(Processing method) Component mass% 1. Polyethylene wax (molecular weight 500) 5 2. Ceresin wax 5 3. Neopentyl glycol trioctanoate Remaining amount 4. Dimethyl polysiloxane ^{* 7} 10 5. Trimethylsiloxysilicic acid solution ^{* 11} 10 6. Decamethylcyclopentasiloxane 10 7. Disintegratable spherical boron nitride particles of the product 2 of the present invention 5 8. Titanium oxide 1 9. Red iron oxide 0.1 10. Red No. 202 1.5 11. Yellow No. 4 aluminum rake 0.2 12. Mica Titanium 5 * 7: Silicon KF96A (6cs) (Shin-Etsu Chemical Co., Ltd.) * 11: Silicon KF7312J (Shin-Etsu Chemical Co., Ltd.)

(Production Method) A. The components (1) to (4) are heated and dissolved. B. Ingredients (5) and (6) are added to "A." and mixed. C. Components (7) to (12) are added to "B." and uniformly dispersed. D. "C." was heated, poured into a mold, and cooled to room temperature to obtain an oily stick lipstick.

The oily stick lipstick of Example 14 was prepared as follows:
"Smooth spread on the skin", "Adhesion to the skin",
It satisfied all of the "glossy finish".

Example 15 Calamine lotion: Calamine lotion was produced by the following formulation and production method.

[0088]   (Direction)       Component mass%     1. Red iron oxide 0.15     2. Disintegratable spherical boron nitride particles of the product 2 of the present invention 5     3. Kaolin 1     4. Ethanol 15     5. Glycerin 3     6. Camphor 0.1     7. Purified water Remaining amount     8. Perfume 0.1

(Production Method) A. Components (1) to (8) are mixed and dispersed. B. "A." was filled in a container to obtain a calamine lotion.

The calamine lotion of Example 14 satisfied all the items of "smooth extension and spread on the skin", "adhesion to the skin", and "glossy finish".

[0091]

EFFECTS OF THE INVENTION The collapsible spherical boron nitride particles of the present invention have appropriate particle strength, and since they are spherical, they have excellent fluidity and good particle handling properties. In addition, it has a property that it collapses when a certain amount of force is applied to the particles and changes into plate-like particles.

Therefore, the cosmetic material containing the collapsible spherical boron nitride particles acts as spherical particles in the initial stage of the makeup operation and gives a smooth and light spread, and after that, by applying the rubbing operation. The spherical particles disintegrate into plate-like particles, have excellent adhesion, develop gloss and luster, and can provide a uniform cosmetic film.

Therefore, the present invention is a makeup cosmetic such as foundation, white powder, base material, face color, blusher, concealer, lipstick, eye shadow, eyeliner, mascara, eyebrow, nail polish, sunscreen, cream, milky lotion, It can advantageously act as a lotion, a beauty essence, a skin care cosmetic such as a pack, a body cosmetic, a hair cosmetic and the like, and components thereof.

[Brief description of drawings]

FIG. 1 is a micrograph (scale: 10 μm) of the disintegratable spherical boron nitride particles of the present invention at a magnification of 500 (× 500).

FIG. 2 5000 of the collapsible spherical boron nitride particles of the present invention
It is a double (× 5000) photomicrograph (scale: 1 μm).

[Explanation of symbols]

1 .... Disintegrating spherical boron nitride particles 2 ……… Plate-shaped boron nitride 3 ……… Boron nitride that's all

Continued front page    F-term (reference) 4C083 AA122 AB151 AB152 AB232                       AB242 AB332 AB432 AC012                       AC022 AC072 AC102 AC242                       AC392 AC442 AC482 AC542                       AC792 AC852 AC862 AD012                       AD022 AD042 AD092 AD152                       AD162 AD172 AD242 AD532                       BB21 BB41 CC11 CC12 CC13                       CC14 DD17 DD21 DD23 DD30                       DD32 DD33

Claims (11)

[Claims] 1. Disintegrating spherical boron nitride particles comprising plate-like boron nitride having an average plate diameter of 1 to 20 μm and inorganic powder having an average particle diameter of 0.01 to 0.5 μm as essential components. 2. A particle disintegration strength of 1,000 to 50,000 P.
The collapsible spherical boron nitride particles according to claim 1, which is a. 3. The collapsible spherical boron nitride particles according to claim 1 or 2, wherein the inorganic powder is boron nitride powder. 4. A plate-like boron nitride having an average plate diameter of 1 to 20 μm and an inorganic powder having an average particle size of 0.01 to 0.5 μm are mixed and spheroidized, and then 1000 in an inert gas atmosphere.
The collapsible spherical boron nitride particles according to any one of claims 1 to 3, which are obtained by firing at ~ 2200 ° C. 5. The collapsible spherical boron nitride particles according to claim 4, wherein the spheroidizing treatment is performed by a spray drying method. 6. A plate-like boron nitride having an average plate diameter of 1 to 20 μm and an inorganic powder having an average particle diameter of 0.01 to 0.5 μm are mixed and spheroidized, and then 1000 in an inert gas atmosphere.
A method for producing a disintegrating spherical boron nitride powder, which comprises firing at ˜2200 ° C. 7. The method for producing collapsible spherical boron nitride particles according to claim 6, wherein the inorganic powder is boron nitride. 8. The method for producing collapsible spherical boron nitride particles according to claim 6 or 7, wherein the spheroidizing treatment is performed by a spray drying method. 9. A cosmetic containing the collapsible spherical boron nitride particles according to any one of claims 1 to 5. 10. The content of the collapsible spherical boron nitride particles is 0.1 to 70 mass% with respect to the total amount of the cosmetic.
Cosmetics described in paragraph. 11. A makeup cosmetic composition according to claim 9.
Item or the cosmetic according to Item 10.