JPH07138140A - Deodorizing cosmetic - Google Patents

Abstract

PURPOSE:To provide a deodorizing cosmetic having sufficient deodorizing effect on body odor, comfortably applicable to human body and giving dry feeling to the skin. CONSTITUTION:This deodorizing cosmetic contains particles covered with a magnesium compound and composed of (A) definite nucleus particles composed of at least one of amorphous silica, amorphous silica-alumina and amorphous alumina silicate having spherical form with primary particle diameter of 0.3-20mum and (B) a magnesium compound covering the above particles. The covered particle can be produced by adding a magnesium compound such as magnesium hydroxide and magnesium oxide to an aqueous slurry of pH10 or below and containing particles of amorphous silica, etc., having definite shape and composed of separated independent particles having a definite spherical primary particle form and a primary particle diameter of 0.3-20mum, heat- treating the mixture to obtain an aqueous dispersion containing the definite nucleus particle as the dispersed phase and at least a part of the magnesium compound as the dispersion medium phase, filtering or drying the aqueous dispersion and crushing the obtained solid component or, as necessary, calcining at 300-800 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorant cosmetic suitable for deodorizing the human body such as armpit odor and sweat odor.

[0002]

2. Description of the Related Art Body odors such as armpit odor, sweat odor, and foot odor cause discomfort not only to the person concerned but also to those around him. Therefore, a person with body odor has a great psychological and psychological burden. Has become. The generation mechanism of body odor such as armpit odor has not been completely clarified at present, but it is generally considered to be caused by bacterial decomposition of sweat and sebum (Perfumer & Flava).
list, 1.12-17 (1979) J. Soc. C
hem. , 34, 193-202 (1982)). In this case, the malodorous substances include lower fatty acids such as isovaleric acid and caproic acid, nitrogen-containing compounds such as ammonia and butylamine, and sulfur-containing compounds such as indole and ethyl mercaptan. Various products have been proposed to eliminate these malodors, but these products are usually classified into the following four types. An antiperspirant that suppresses sweating by its astringent action by using an astringent aluminum compound. By using a bactericide, it prevents the growth of bacteria and prevents the decomposition of sweat and sebum. A deodorant that eliminates the odor generated by using metal oxides and plant extracts. A masking agent that masks odors with fragrances.

Chlorhydroxyaluminum is most commonly used as the antiperspirant. As the bactericide, triclosan, hexachlorophene, various quaternary ammonium compounds, etc. are often used.
As the deodorant, a metal oxide such as zinc oxide, magnesium oxide, an alkali metal bicarbonate, an alkaline earth metal silicate carbonate, or a plant extract is used.
As a masking agent for the above, an aromatic substance having a pleasant odor such as eugenol is used.

However, the above-mentioned conventional antiperspirants, germicides,
Deodorants and masking agents have a problem that they are not sufficiently satisfactory in terms of effectiveness, safety and usability.

Particularly, magnesium oxide is excellent in its deodorizing action in that it directly neutralizes the lower fatty acid, which is the main substance of sweat odor, but when applied to the human body, it gives a heavy feel to the skin, so it is an antiperspirant. There is a fatal lack of "dryness" required for agents.

[0006]

DISCLOSURE OF THE INVENTION The object of the present invention is to have a sufficient deodorizing effect against body odor such as armpit odor and sweat odor, and to eliminate the feeling of dryness, which is suitable for application to the human body. To provide odor cosmetics.

[0007]

Means for Solving the Problems As a result of intensive studies conducted by the present inventors, the use of certain specific magnesium compound-coated particles has a sufficient deodorizing effect and a deodorant effect with a dry feeling. The inventors have found that a cosmetic can be obtained, and completed the present invention.

Thus, according to the invention, amorphous silica in which the individual particles independently have a well-defined spherical primary particle shape and have a primary particle size of 0.3 to 20 μm as measured by electron microscopy. Deodorant containing magnesium compound-coated particles, characterized in that it comprises fixed core particles composed of at least one of amorphous silica-alumina or amorphous aluminosilicate and a magnesium compound coating the fixed core particles. Cosmetics are provided.

Further in accordance with the present invention, amorphous silica in which each particle independently has a well-defined spherical primary particle shape and has a primary particle size of 0.3 to 20 μm as measured by electron microscopy. At least one magnesium compound of magnesium hydroxide, magnesium oxide, magnesium acetate, magnesium nitrate in an aqueous slurry having a pH of 10 or less, which has a fixed particle made of at least one of amorphous silica-alumina and amorphous aluminosilicate. And heat-treated under normal pressure or pressure to prepare an aqueous dispersion containing the regular core particles as a dispersion phase and at least a part of the magnesium compound as a dispersion medium phase, and the aqueous dispersion is filtered or dried. And the obtained solid content is crushed or, if necessary, calcined at a temperature of 300 ° C. to 800 ° C. Deodorant cosmetic is provided comprising a beam compound-coated particles.

The present invention will be described in detail below.

The magnesium compound-coated particles according to the present invention are such that each particle independently has a well-defined spherical primary particle shape, and the primary particle of the particle is 0.3 to 20 μm.
It is characterized in that it has a particle diameter in the range of m, and that it is obtained by coating regular core particles such as amorphous silica with a magnesium compound.

When the shape of the regular core particles is not spherical, there are problems such as giving a rough feel when applied to the skin and making the adhered powder white and conspicuous. Further, even when the particle size of the regular core particles exceeds 20 μm, it is not preferable because it gives a rough feel when applied to the skin. On the other hand, if the particle size is 0.3 μm or less, the feeling of use is deteriorated, the initial purpose, the feeling of dryness, is deteriorated, and powder is scattered during handling, which is not preferable.

It is an essential requirement that the regular core particles are amorphous. The material for the core particles is amorphous silica,
One or a mixture of amorphous silica / alumina or amorphous aluminosilicate is selected. The crystalline ones have a high density and a high hardness, so that they not only give a rough feel when applied to the skin, but are also difficult to coat with the amount of magnesium compound required in the present invention. The reason for this has not been clarified, but in the case of amorphous particles, it is considered that a large amount of magnesium compound can be supported by partially penetrating the magnesium compound into the fine structure of the particle.

As a preferable example of the amorphous silica fixed core particles according to the present invention, as described in, for example, JP-A-5-193927, an acrylamide polymer is added to an alkali silicate aqueous solution to obtain the silicic acid. Spherical amorphous silica particles prepared by partially neutralizing an alkali with an acid, allowing it to age at room temperature and allowing it to aggregate and grow, and Silton AMT- prepared by acid-treating p-type zeolite. Examples thereof include silica particles.

As the amorphous silica-alumina fixed core particles, as a public example, the molar ratio of Al ₂ O ₃ : SiO ₂ is in the range of 1: 1.8 to 1: 5.0, and the particles are Examples thereof include those obtained by subjecting an aqueous slurry of synthetic zeolite having a uniform diameter to acid treatment under a condition of pH 4 or more to make it amorphous, or those obtained by subjecting this to calcination treatment.

As the amorphous aluminosilicate particles, ion-exchanged zeolites such as zeolite A, zeolite X, zeolite Y, zeolite P, analcime, mordenite, faujasite, etc. are treated with an acid to make them amorphous, or Examples include those obtained by firing.

The magnesium compound-coated particles according to the present invention are prepared by coating the fixed-form core particles with a magnesium compound.

Examples of the magnesium compound which coats the regular core particles of the present invention include MgF ₂ , MgCl ₂ and KMgCl.
₃ , magnesium halides such as MgBY ₂ , Mg
O, Mg _(OH) magnesium oxide or hydroxide of ₂ such _{as, MgSO 4, MgSO 4 · 6H} 2 O, Mg (N
_{O 3) 2, Mg (NO} 3) 2 · 6H 2 O, Mg (P
O ₄ ) ₂ , magnesium oxyacid salts such as MgHPO ₄ , M
g (CH ₃ COO) ₂ , Mg (CH ₃ CH ₂ CO
O) ₂ , other magnesium organic acid salts, and the like, and magnesium silicate, magnesium aluminosilicate, and the like can be exemplified. Among them, the magnesium for coating of the present invention includes magnesium hydroxide and magnesium silicate. , Magnesium oxide or a mixture thereof, and a mixture substantially consisting of the above compounds and containing a very small amount of another substance, such as magnesium aluminosilicate, are particularly excellent in the neutralizing effect on the lower fatty acid and are preferable.

In particular, magnesium silicate, magnesium aluminosilicate, etc. formed by reacting magnesium oxide, hydroxide, or salt such as magnesium hydroxide, magnesium oxide, magnesium acetate, magnesium nitrate, etc. as a starting material on the surface of the fixed core particles. A mixture containing is most suitable as the coating layer.

The coverage of the magnesium compound is preferably 1 to 50% by weight, and particularly preferably 2 to 35% by weight, in terms of MgO, based on the regular core particles. If the coating amount is less than the above lower limit, a uniform coating cannot be formed on the entire surface of the particle, or even if it is coated, the effect of the present invention cannot be sufficiently achieved. On the other hand, when the amount is more than the upper limit, the adhesiveness of the coating is deteriorated and the coating layer is likely to be peeled off, and the particles are likely to be aggregated or detached.

Regarding the coating method of the magnesium compound, a coating method known per se can be employed and is not particularly limited, but coated particles coated by the method described below are most preferable.

Production Method of Magnesium Compound Coated Particles The amorphous fixed particles are made into an aqueous slurry under the condition that the pH thereof is 10 or less.

At least one or more of magnesium oxide, hydroxide and magnesium salt such as magnesium hydroxide, magnesium oxide, magnesium acetate and magnesium nitrate is added to this aqueous slurry, and the mixture is stirred and crushed with a mixer or the like to obtain a regular shape. A dispersion liquid in which at least a part of the core particles such as the dispersed phase, the added magnesium salt or the hydroxide is dissolved in the solution phase is prepared.

The dispersion is heated at atmospheric pressure or under pressure to react the core particles with the magnesium salt, hydroxide or the like to form a coating layer on the surface of the particles.

After the completion of the reaction, the solid content of the particles is filtered, washed with water, dried and calcined at 300 to 800 ° C. to produce magnesium compound-coated particles.

In the present production method, the surface of the core particles existing as the slurry dispersed phase and the added magnesium compound, for example, Mg (OH) ₂ are reacted to form a coating layer partially bonded. Is a remarkable feature.

In the present method, the solid content concentration of the aqueous slurry is not particularly critical, but usually the solid content concentration is 2 to 5.
0% by weight is used, preferably 5 to 30% by weight.

In this method, the pH of the slurry is 10
Kept below. When the pH exceeds 10, deposition of Mg (OH) ₂ or the like dissolved in the dispersion medium on the particle surface is not sufficiently carried out and a good coating layer cannot be formed.
When the pH of the slurry exceeds 10, therefore, acid or the like is added to adjust the pH to 10 or less.

In the present method, the coating forming reaction can be carried out under normal pressure or under pressure. However, in the case of carrying out under normal pressure, magnesium hydroxide is added to the slurry and then the dispersion liquid is mixed with a mixer or the like. Is agitated and crushed, and this is usually left for maturing for about 30 minutes.

Then the dispersion is stirred at 50 ° C. to 200 ° C.
The temperature is raised to ℃ and the reaction is carried out. The reaction time is usually 1 to 10 hours, though it depends on the temperature and other conditions.

After the completion of the reaction, the slurry of the coated particles thus obtained is taken out, filtered, washed with water, dried and then fired in the above-mentioned temperature range to obtain final coated particles.

When the reaction is carried out under pressure, the temperature is raised to about 150 ° C. in the autoclave or the like to terminate the reaction. Usually, the reaction time under pressure is 0.5 to 5 hours to complete the reaction. After that, the same treatment as in the atmospheric method is performed. In the case of reaction under pressure, aging is not always necessary.

In the present invention, the desired deodorant cosmetic can be obtained by adding various bases for cosmetics depending on the use and dosage form in addition to the magnesium compound-coated particles.

Other compounding ingredients include, for example, avocado oil, almond oil, olive oil, grape seed oil, sesame oil, sasanqua oil, safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, persic oil, castor oil. Oils, sunflower oil, cottonseed oil, peanut oil, cocoa oil, palm oil, coconut oil, beef tallow, fish oil, hydrogenated oil, turtle oil, pork oil, mink oil, egg yolk oil, etc .; whale wax, shellac, beeswax,
Waxes such as lanolin, carnauba wax and candelilla wax; hydrocarbons such as liquid paraffin, liquid polyisobutylene, squalane, blistan, vaseline, paraffin and ceresin; succinic acid, tartaric acid, citric acid, undecylenic acid, lauric acid, myristic acid , Fatty acids such as palmitic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, ricinoleic acid and behenic acid; ethanol, isopropanol, lauryl alcohol, cetanol, 2-hexyldecanol, stearyl alcohol,
Alcohols such as isostearyl alcohol, oleyl alcohol, lanolin alcohol; ethylene glycol,
Diethylene glycol monoethyl ether, triethylene glycol, polyethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin,
Polyhydric alcohols such as patyl alcohol; sugars such as glucose, sucrose, lactose, xylitol, sorbitol, mannitol, maltitol; diisopropyl adipate, cetyl isostearate, oleyl oleate, decyl oleate, lanolin acetate, butyl stearate,
Esters such as isopropyl myristate, diethyl phthalate, and hexyl laurate; metal soaps such as aluminum stearate, magnesium stearate, and zinc stearate; gum arabic, sodium alginate, casein, carrageenan, karaya gum, agar, quince seed, gelatin, Natural water-soluble polymer compounds such as dextrin, starch, tragacanth and pectin, semi-synthetic polymer compounds such as propylene glycol alginate, ethyl cellulose, crystalline cellulose and methyl cellulose; carboxyvinyl polymer, polyvinyl methyl ether, methoxyethylene maleic anhydride copolymerization Synthetic polymer compounds such as coalescing; methylphenylpolysiloxane, dimethylpolysiloxane, decamethylpentasiloxane, methylhydrogenpolysiloxane Silicone oil such as sorbitan trioleate, polyoxyethylene monooleate, polyoxyethylene nonyl phenyl ether, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl glyceryl, polyoxyethylene alkyl hydrogenated Non-ionic surfactants such as castor oil; dialkyl sulfosuccinates,
Anionic surfactants such as alkylallyl sulfonates, higher alcohol sulfates, phosphates, etc .;
Preservatives such as ethyl paraoxybenzoate and methyl paraoxybenzoate; vitamins such as vitamin A, vitamin D, vitamin E, vitamin K; hormones such as estradiol, ethyl estradiol, cortisone; red 2, blue 1, red 202 , Yellow 201, green 204,
Organic pigments such as purple 201; aluminum powder, talc,
Kaolin, pentonite, mica, titanium, red iron oxide,
Inorganic pigments such as calamine; UV absorbers such as urocanic acid and synogisate; anti-inflammatory agents such as allantoin, aloe powder, guaizulene; CFC 11, CFC 12, CFC 21,
Freon 22, Freon 113, Freon 114, Freon C3
18, propellants such as dimethyl ether, liquefied petroleum gas, methyl chloride, methylene chloride, isobutane, isopentane and carbon dioxide, and purified water can be used.

In the cosmetic of the present invention, as another component, for example, an antiperspirant such as aluminum hydroxy chloride, aluminum chloride, aluminum sulfate, basic aluminum bromide, aluminum phenol sulfonic acid, basic aluminum iodide, etc. 3,4,4-trichlorocarbanilide (TCC), benzalkonium chloride, benzethonium chloride, alkyltrimethylammonium chloride,
Fungicides such as resorcin, phenol, sorbic acid, salicylic acid, and hexachlorophene; jascent, skatole, lemon oil, lavender oil, absolute, jasmine, vanillin, benzoin, benzyl acetate,
A masking agent such as menthol can also be blended by a conventional method.

[0036]

The deodorant cosmetic composition of the present invention has an excellent deodorant effect and a feeling of use, and is particularly suitable as a deodorant for body odors such as armpit odor, sweat odor and foot odor. . The deodorant cosmetic composition of the present invention can be used as an external deodorant type product such as an aerosol, roll-on, powder, cream and stick together with other suitable components.

Next, the present invention will be described in detail with reference to examples. All parts and% shown below are based on weight unless otherwise specified.

<Preparation of Magnesium Compound Coated Particles>

[Reference Example 1] Sodium silicate (SiO ₂ 27%, Na ₂ O
9%) Sodium aluminate (Al ₂ O 22.5%, Na ₂
O18.6%) and commercially available 49% NaOH were used to prepare a diluted sodium silicate solution and a diluted sodium aluminate solution so that the total molar ratio would be 16 kg. Na ₂ O / SiO ₂ = 0.8 SiO ₂ / Al ₂ O ₃ = 8.0 H ₂ O / Na ₂ O = 70 Next, in a stainless steel container with an internal volume of about 20 L or with 8 kg of dilute sodium silicate solution. 8 kg of sodium aluminate solution was slowly mixed with stirring to obtain a uniform aluminosilicate alkali gel.

Then, the alkali aluminosilicate gel was heated to 90 ° C. with vigorous stirring and crystallized at the same temperature for 48 hours. After completion of crystallization, the mother liquor and the solid content are separated by suction filtration, washed thoroughly with water, and the solid content concentration of Na is 52%.
-About 1.5 kg of P-type zeolite cake was obtained. Next, 10L
1 kg of the above cake was sufficiently dispersed in 4 L of water in a stainless steel container, and 2 mol of 10% sulfuric acid was added to the Na ₂ O content in the zeolite with stirring over 10 hours. After addition, the mixture was stirred for 1 hour. After filtering and washing with water, the cake was re-valveed to obtain an amorphous aluminosilicate-based particle slurry having a concentration of 40%. The pH of the slurry at this time is 4.1.
Met. (Sample A)

Next, MgO was added to the solid content of this slurry.
Magnesium hydroxide (# 200 manufactured by Kamishima Chemical Co., Ltd.) powder equivalent to 10% in terms of conversion was added, and after sufficiently dispersed, the temperature was raised to 95 ° C. in a warm bath and treated at that temperature for 8 hours. It was dried overnight in a constant temperature oven. The dried block-like material was crushed with a sample mill and fired at 500 ° C. for 1 hour to obtain a spherical amorphous magnesium aluminosilicate-coated particle powder. (Sample B) The properties of this powder are shown in Table 1.

[0041]

Reference Example 2 1 kg of the sample A slurry obtained in Reference Example 1
Was stirred overnight in a thermostatic oven at 110 ° C., and further calcined at 450 ° C. for 3 hours to obtain amorphous aluminosilicate spherical powder. Next, 1 L of pure water was weighed in a 3 L beaker, and 30 g of the amorphous aluminosilicate spherical particle powder was fired under stirring.
After 0 g was added and sufficiently dispersed, 1.2 times the amount of sulfuric acid (preliminarily diluted to 50%) of the theoretical reaction amount of Al ₂ O ₃ and Na ₂ O in the amorphous aluminosilicate spherical particle powder was slowly added. . At the end of the addition of sulfuric acid, the temperature of the slurry rose to about 90 ° C, but it was further heated and treated at 98 ° C for 2 hours. Next, the mother liquor and solids are separated by suction filtration, washed thoroughly with water,
The cake was re-valved to obtain a slurry of spherical silica particles having a solid content concentration of 30%. The pH of this slurry is 3.
It was 0. (Sample C)

Next, MgO was added to the solid content of this slurry.
After adding magnesium hydroxide (Kamishima Chemical # 200) powder equivalent to 10% in terms of conversion and sufficiently dispersing, the temperature was raised to 95 ° C. in a warm bath and treated at that temperature for 8 hours, and after the treatment was completed, the mother liquor and solid were obtained by suction filtration. After separating the fractions, it was thoroughly washed with water and dried overnight in a thermostatic oven at 110 ° C. The dried block-like material was pulverized with a sample mill and fired at 500 ° C. for 1 hour to obtain spherical amorphous magnesium silicate-coated particle powder. (Sample D) The properties of this powder are shown in Table 1.

[0043]

[Reference Example 3] Sample C slurry 500 obtained in Reference Example 2
Weigh g in a stainless steel beaker of 1 L, add magnesium hydroxide (Kamijima Chemical # 200) powder so that the solid content is 25% in terms of MgO, and after sufficiently dispersing, put in an autoclave with an internal volume of 1 L and stir. The temperature was raised to 180 ° C. (pressure 8 kg / cm ² ) for 5 hours. Reference example 2
It was washed with water, dried, pulverized and fired in the same manner as in (1) to obtain spherical magnesium silicate-coated particle powder. The properties of this powder are shown in Table 1.

[0044]

[Table 1]

[0045]

[Reference Example 4] A commercially available No. 3 sodium silicate (SiO ₂ 22.3%, Na ₂ O 7.0%, S) was added to a ₂ L stainless beaker.
471 g (7% as SiO ₂ concentration in the total amount of liquid) of 471 g of iO ₂ / Na ₂ O = 3.29 was weighed out, added with 327 ml of pure water, put in a constant temperature bath adjusted to 20 ° C., and stirred with a high stirrer. On the other hand, 300 g of an aqueous acrylamide polymer solution (about 10% aqueous solution manufactured by Wako Pure Chemical Industries, Ltd., average molecular weight 500,000) was added (28% as polyacrylamide anhydride to SiO ₂ content) and sufficiently dispersed.

Next, 402 g of 7% sulfuric acid adjusted to 20 ° C.
Was added in about 1 minute (pH was 10.70 after the completion of the addition). After the completion of the addition, the stirring was stopped and the mixture was allowed to stand for 12 hours.
After standing for 12 hours, the precipitate and mother liquor were separated by filtration, and the obtained cake was redispersed in pure water to sufficiently disperse it, and then 7% sulfuric acid was added until the pH reached 3.0 and the pH was adjusted to 3.0. When it was almost stable, the mixture was stirred for 1 hour as it was, then filtered and washed with water, and the cake was re-valveed to purify a 15% concentration spherical silica particle slurry. (Sample E)

Next, MgO was added to the solid content of this slurry.
Magnesium hydroxide (# 200 manufactured by Kamishima Chemical Co., Ltd.) powder equivalent to 10% in terms of conversion was added, and after sufficiently dispersed, the temperature was raised to 95 ° C. in a hot bath and treated at that temperature for 8 hours. After dispersing the solid content, wash thoroughly with water, and
It was dried overnight in a constant temperature oven at 0 ° C. The dried block-like material was pulverized with a sample mill and fired at 500 ° C. for 1 hour to obtain spherical magnesium silicate-based composite particle powder. The properties of this powder are shown in Table 2.

[0048]

[Reference Example 5] Spherical silica-magnesium-based composite particle powder was obtained by the same treatment as in Reference Example 4, except that MgO added in Reference Example 4 was changed to 30%. The properties of this powder are shown in Table 2.

[0049]

[Reference Example 6] A spherical magnesium silicate-based composite particle powder was prepared in the same manner as in Reference Example 4 except that the temperature of the constant temperature bath and the added 7% sulfuric acid was changed to 2 ° C. The properties of this powder are shown in Table 2.

[0050]

Reference Example 7 Sample E in Reference Example 4 was dried overnight in a constant temperature dryer at 110 ° C. and then pulverized to prepare a spherical silica powder.
Then magnesium nitrate beaker 500 ml (manufactured by Wako Pure Chemical Industries, reagent first grade _{Mg (NO 2) 2 · 6H} 2 O) 28.4g
Was weighed, added with 328 g of pure water, dissolved under stirring, and after dissolution, 43.2 g of dried upper spherical silica (water content 6%, 10% as MgO based on silica solid content was added) was added little by little, and the addition was completed. Then, the mixture was further stirred for 1 hour and dried as it was at 110 ° C. under constant temperature overnight. Next, the dried block-like material was pulverized with a sample mill and then fired at 500 ° C. for 3 hours to obtain spherical magnesium silicate-based composite particle powder. The properties of this powder are shown in Table 2.

[0051]

Reference Example 8 A spherical magnesium silicate-based composite particle powder was obtained in the same manner as in Reference Example 6 except that magnesium nitrate was added so that MgO was 25% in Reference Example 7. The properties of this powder are shown in Table 2.

[0052]

Reference Example 9 Instead of magnesium nitrate in Reference Example 7, magnesium acetate (Wako Pure Chemical Industries, Ltd. reagent grade Mg (CH ₃ CO
_O) 2 · _4H 2 _O) was used instead got magnesium silicate-based composite particles spherical containing 10% of MgO in the same manner as in Reference Example 6. The properties of this powder are shown in Table 2.

[0053]

[Table 2]

The chemical composition, physical properties, etc. were measured by the following methods. (Measurement method) 1. Chemical composition It was measured according to JIS M-8852 silica stone analysis method. 2. Apparent specific gravity It was measured according to JIS K-6220.6. 3. Oil absorption amount Measured according to JIS K-5101.19. 4. Specific surface area Sorptomatic Series manufactured by Carlo Erba
s 1800 was used and measured by the BET method. 5. Whiteness Tokyo Denshoku Co., Ltd. AUTOMATIC REFLECT
It was measured with an O METER Model TR-600. 6. Particle size Aperture tube 20μ by Coulter Counter (TA-II type manufactured by Coulter Electronics Co.)
m, 50 μm. 7. Particle size by SEM Representative particles were selected from the photographic image obtained with a scanning electron microscope (S-570 manufactured by Hitachi), and the diameter of the particle image was measured using a scale and shown as the primary particle size. 8. Refractive index Determined by the liquid immersion method.

[0055]

[Examples 1 to 5 and Comparative Example 1] The magnesium compound-coated particles obtained in Reference Examples 1 to 5 and talc powder having an average particle size of about 10 µ were uniformly mixed as shown in Table 3 to obtain a powder type powder. A deodorant cosmetic composition was prepared and its dry feeling and deodorant effect were evaluated by the following methods. The results are shown in Table-3.

(Smoothness) Temperature: 35 ° C., Relative humidity:
After entering the 80% room for about 10 minutes and sweating, the sample was applied to moist skin with the sweat lightly wiped off, and the degree of dryness at that time was evaluated by sensory evaluation based on the following criteria. ◎… Very soft feeling ○… Smooth feeling △… Slightly feeling ×… almost no smooth feeling

(Deodorizing effect) Man 1 judged to have strong axillary odor
A deodorant test was conducted as follows by a panel consisting of 30 persons, 5 persons and 15 women. The sample was applied to one armpit of the panelist, and the other was used as a control, and the sample was applied once a day in the morning and once a day in the afternoon for a total of 4 times. For the evaluation of odor, a cotton pad was placed under the armpit and collected 10 minutes later, and the odor of the pad was compared with that of a control by a professional judge. When the odor intensity is clearly weaker than that of the control, the deodorizing effect is considered to be good, and the numerical value is panel 3
It was expressed by the number of 0 persons who recognized the deodorizing effect.

[0058]

[Table 3]

[0059]

Examples 6 to 9 and Comparative Examples 2 to 5 Using the magnesium compound coated particles obtained in Reference Examples 6 to 9, deodorant cosmetics as shown in Table 4 were prepared. In the same manner, the dry feeling and deodorant effect were evaluated. Table of the results
4 shows.

[0060]

[Table 4]

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[Procedure amendment]

[Submission date] January 31, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction content]

[0044]

[Table 1]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0060

[Correction method] Change

[Correction content]

[0060]

[Table 4]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Suzuki 4-1-2-1, Nihombashi Muromachi, Chuo-ku, Tokyo Kinsan Building Mizusawa Chemical Industry Co., Ltd.

Claims (2)

[Claims] 1. Amorphous silica, in which each particle independently has a well-defined spherical primary particle shape and has a primary particle size of 0.3 to 20 μm as measured by electron microscopy. Deodorant cosmetics containing magnesium compound-coated particles, characterized in that they are composed of regular core particles made of at least one of alumina and amorphous aluminosilicate and magnesium compounds coating the regular core particles. 2. Amorphous silica, in which the individual particles independently have a well-defined spherical primary particle shape and have a primary particle size of 0.3 to 20 μm as measured by electron microscopy. -Aqueous slurry having a pH of 10 or less, which has fixed particles made of at least one of alumina and amorphous aluminosilicate, and magnesium hydroxide, magnesium oxide,
At least one or more magnesium compounds of magnesium acetate and magnesium nitrate are added, and the mixture is heat-treated under normal pressure or pressure to form an aqueous dispersion containing the regular core particles as a dispersion phase and at least a part of the magnesium compound as a dispersion medium phase. A liquid is prepared, the aqueous dispersion is filtered or dried, and the obtained solid content is crushed or, if necessary, 300 ° C. to 80 ° C.
The deodorant cosmetic composition according to claim 1, which contains magnesium compound-coated particles obtained by baking at a temperature of 0 ° C.