JP2813547B2 - Functional powders for cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a functional material for cosmetics.

[0002]

2. Description of the Related Art The term "functional material for cosmetics" in the present invention refers to a material for cosmetics having a function of achieving the object of cosmetics, that is, keeping the body clean and beautifully dressed. For example, functional materials for cosmetics include ultraviolet protection agents, coloring agents, humectants, antibacterial agents, whitening agents, deodorants, cell activators, and fragrances.

[0003] Functional materials for cosmetics include powdered materials and liquid materials. Examples of the powder include a colorant such as a pigment and an ultraviolet ray protective agent such as titanium oxide and iron oxide. Examples of the liquid include liquid hyaluronic acid and fragrance.

[0004] If the powdery functional material for cosmetics has a large particle size, an amorphous shape or a needle-like shape, the cosmetic material becomes poor in elongation and slippage when used, resulting in a rough feeling. . When the particle size is 1 micron or less, the feel at the time of use is good, but there is a problem that it is difficult to remove the cosmetic because the adhesiveness to the skin is too good. On the other hand, in the case of a liquid functional material for cosmetics, evaporation and vaporization are large, and it is difficult to provide sustained release.

Conventionally, physical UV protective agents such as titanium oxide, iron oxide, and zinc oxide are said to be safe for the skin as the UV protective agents. It was difficult to actually use cosmetics as an ultraviolet protection agent. Recently, ultrafine particles having a particle size of 0.03 to 0.06 micron have been developed.
It has been noted that transparency may be obtained in addition to the improvement of UV protection.

[0006] In order to obtain transparency, the particles must be primary particles without agglomeration (ie, in a powder state in which many particles are present, individual particles do not agglomerate with other particles,
Although it is necessary to disperse the particles that exist alone), it is necessary to disperse them. However, if the particles are made into ultrafine particles, the particles will be strongly aggregated, so that they actually become larger aggregated particles (ie, secondary particles). In the powder state, transparency could not be obtained. In addition, the aggregated particles are unfavorable as cosmetics because they cause poor elongation and slippage of the cosmetics at the time of using the cosmetics and give a rough feeling.

[0007] Further, conventionally, as coloring agents for cosmetics and other various products, Red No. 226, Red No. 202 and Red 20
No. 6, orange No. 203, yellow No. 4, aluminum laker,
Organic pigments such as carbon black, yellow iron oxide, red iron oxide, purple iron oxide, black iron oxide, ultramarine, mango violet, chromium oxide, chromium hydroxide, and other inorganic pigments are used depending on the purpose of use. I have. These colorants are generally selected by mixing with powder such as talc, carion, titanium dioxide, microcrystalline cellulose, and silk powder so that the product has a desired color. In a product that is a mixed system in which raw materials are combined, there are the following problems. (1) Saturation is improved by making the colorant finer, but there is agglomeration between particles, and it is difficult to obtain the effect of improving the saturation. (2) Color breakage and color unevenness may occur due to the blending of the coloring agent. (3) Depending on the blending of the coloring agent, the particles may repel, coagulate, or precipitate due to differences in particle shape, specific gravity, surface charge, and the like. (4) It is difficult to maintain the dispersion stability and the adhesion to the skin of all of the compounded coloring agents at the best. In particular, in order to obtain a light interference effect of a colored pearl agent or the like, it is important to improve the dispersion of the colored pearl agent, but dispersion is difficult. In the technique of using photochromic powder to obtain the same flesh color both indoors and outdoors, the dispersion of the agent is important, but it is difficult to maintain the dispersion. (5) The colorant is a needle crystal, a scale-like crystal, or an amorphous particle, and a general one is rough and uncomfortable. It has poor adhesion to the skin and is difficult to remove with a remover. When ultrafine particles of 1 μm or less are used, the feel is improved, but the removability is further deteriorated.

As techniques for improving the above-mentioned cosmetic colorant, there are techniques described in JP-B-61-28605, JP-B-5-3449 and JP-B-4-55972.

Japanese Patent Publication No. Sho 61-28605 and Japanese Patent Publication No. Hei 5-3449 relate to a technique for producing spherical hollow capsules by an interfacial reaction method using sodium silicate and enclosing a colorant in the internal space of the hollow capsules. . In the encapsulation by the interfacial reaction method, it is difficult to select a surfactant and a solvent, whereby the size and uniformity of the sphere are determined, the processing steps are complicated, and the production cost is extremely high. Therefore, the product is expensive. Another disadvantage is that the colorant enters the interior of the capsule and the colorant particles are agglomerated, so that the color vividness, sharpness and depth are impaired, resulting in a pastel tone.

In Japanese Patent Publication No. 4-55972, it is difficult to penetrate a coloring agent because the pore diameter of general silica gel particles is 2 to 20 nm, and the coloring agent adheres to the silica gel surface even when the silica gel is dyed with the coloring agent. However, there is a problem that the coloration is easily caused or the color is easily dropped off. Therefore, as a countermeasure, a technique is disclosed in which the silica gel particles are subjected to a hydrothermal treatment to expand the pore diameter and to penetrate a coloring agent for dyeing. However, the pore diameter of the silica gel particles not subjected to the hydrothermal treatment is 2 to 20 nm, whereas the pore diameter of the silica gel particles subjected to the hydrothermal treatment is about 25 nm even though it is expanded. Is not enough, there is a drop off due to surface adhesion, and
Since a dyeing method cannot be adopted for a coloring agent having no affinity for silica gel, it is necessary to select an appropriate coloring agent depending on a difference in affinity, and therefore, usable coloring agents are limited.

Conventionally, retinoids and the like have been used as cell activators, and liquid hyaluronic acid, chitins and emollients have been used as moisturizers as functional materials. It is preferable that these have a sustained release property, but since they are liquid, they are easily evaporated, and a technique for imparting the sustained release property has not been established.

[0012]

An object of the present invention is to solve the above-mentioned conventional problems. The present invention
Cosmetic functional material with good elongation, good feel when applied, and easy removal with a remover etc. when the cosmetic is dropped, easy to manufacture and inexpensive The purpose is to provide things.

In the present invention, when the functional material is a physical ultraviolet protective agent, the present invention provides a cosmetic powder having a transparent feeling.

In the present invention, when the functional material is a colorant, the colorant falls off without impairing the vividness, sharpness and depth of the color, even when a colorant conventionally used in cosmetics is used. The present invention provides an improved colored cosmetic without any problems.

In the present invention, when the functional material is in a liquid state, it is another object of the present invention to impart sustained release.

[0016]

According to the present invention, one or two or more functional materials for cosmetics are composed of silica, and the functional material for cosmetics and silica are one powdery or granular material. a mixed to 40μm following granular material is in the middle, or
Or one or more functional materials for cosmetics
Powder particles of 40 μm or less fixed in a mixed state to mosquito particles
A is, to achieve the above-mentioned problems by cosmetic functional particulate material, wherein the powder granules are substantially spherical or donut shape having an opening or recess in the surface center.

When the cosmetic functional material of the present invention is in the form of a powder, the cosmetic functional material is added to water or an aqueous solution containing a dispersant, mixed and stirred, and further sonicated to form a liquid. By mixing and stirring with a silica sol solution, applying ultrasonic waves, and spray-drying the solution, the functional powder for cosmetics of the present invention is produced.
Can be built.

When the cosmetic functional material of the present invention is liquid, the liquid cosmetic functional material is added to a solvent or water and mixed and stirred, and the liquid and the silica sol liquid are mixed and stirred. And spray-drying the mixture to obtain the cosmetic of the present invention.
It is possible to produce functional powders for foods.

When liquid and powdery functional materials are used as the cosmetic functional material, the liquid cosmetic material and the powdery functional material are mixed with a solvent and water. Alternatively, the mixture of the present invention is added to an aqueous solution containing a dispersing agent, mixed and stirred, further irradiated with ultrasonic waves, mixed and stirred with the silica sol liquid and irradiated with ultrasonic waves, and the liquid is spray-dried .
Functional powders for cosmetics can be manufactured.

[0020]

According to the present invention, even if the functional material for cosmetics is an ultrafine powder, it disperses by using a dispersant (eg, a surfactant) and ultrasonic waves to form a silica sol-based primary particle. By dispersing and spray-drying this, the silica sol is turned into silica gel at once, and the powder of the cosmetic functional material is fixed between the silica particles in a dispersed state of the primary particles. The powder obtained according to the present invention is 40
Spherical particles or doughnut-shaped particles having a size of 1 μm or less, preferably about 1 to 20 μm. Since this powdery granule is spherical or donut-shaped, it easily stretches and slides when used, solving the problem of the conventional feel, and easily removing cosmetics with a remover etc. can do.

When ultrafine particles of a metal oxide such as titanium oxide are used as the functional material for cosmetics, the ultrafine particles of the metal oxide are fixed in the form of primary particles without agglomeration. A powder having high transparency, which could not be obtained conventionally, can be obtained.

According to the present invention, when a coloring agent is used as a functional material for cosmetics, the compounding powder of the coloring agent is dispersed in a silica sol in the state of primary particles by loosening agglomeration using a dispersing agent and ultrasonic waves. Then, since the dispersed and mixed state of the primary particles is fixed as silica gel at once by spray drying, separation and interaction of the conventional compounding colorant can be eliminated. In addition, since the compounding colorant is dispersed and fixed in the silica in the form of primary particles in the powder, the color is vivid, and a sharp and deep color can be obtained. In particular, the dispersibility of the coloring material is important for pearl pigments and photochromic powders (white powders that can obtain the same skin color both indoors and outdoors), but according to the present invention, functional powders for cosmetics having excellent effects are provided. The body is obtained. Also, even if the colorant is not ultrafine particles, if its dispersibility affects color, sharpness, and gloss,
In the present invention, the colorant is fixed in a dispersed state, so that the hue can be improved and stabilized.

Also, deodorants as functional materials for cosmetics,
When using antibacterial agents, whitening agents, humectants, cell activators, etc.
These may be used alone. For example, by mixing them in a silica sol with a colorant, a composite material can be obtained without causing any problem.

Further, many of the fragrances, cell activators, humectants, deodorants and the like are liquid, and when one or more of these liquid cosmetic functional materials are blended, these are particles of silica. Since it is fixed in a mixed state, a powder having a sustained release effect of gradually releasing the liquid component can be obtained. This powder is spherical or donut-shaped, and has an opening or a concave portion at the center of its surface, which is effective for imparting sustained release properties. In this way, a liquid such as a fragrance can be made into a powder, and it can be made effective for a long period of time due to its sustained release.

According to the present invention, dispersion and immobilization of primary particles in a state of primary particles without agglomeration of ultrafine particles are achieved by the following technique. First, ultrafine particles are added to water or an aqueous solution containing an appropriate amount of a dispersant (such as a surfactant), mixed and stirred, and further subjected to ultrasonic waves to obtain dispersion in a state of primary particles. The dispersion liquid and the silica sol liquid are mixed and stirred, and ultrasonic waves are applied to obtain a dispersion liquid of ultrafine primary particles in the silica sol system. Next, when this dispersion is spray-dried, it becomes a spray mist and the silica sol is immediately solidified to fix the ultrafine particles of the functional material in the state of primary particles. In this way, the powder is solidified into a spherical or donut shape having a diameter of 40 μm or less, preferably 1 to 20 μm to obtain a powder. Since the ultrafine particles are fixed to the silica in a state of being dispersed in the primary particles, transparency can be exhibited. The ultrasonic wave is preferably about 25 to 30 KHZ. Spraying atmosphere temperature is 180 ~ 2
20 ° C. is preferred.

In the case of powdery functional materials for cosmetics that are not ultrafine particles, the powders and granules of the present invention can be obtained by the same method.

In the case of using only the liquid cosmetic functional material,
Since it is not necessary to disperse in the state of primary particles, the functional material for liquid cosmetics is added to a solvent or water and mixed and stirred,
The liquid and the silica sol liquid are mixed and stirred, and the mixed liquid is spray-dried to form powder having a particle size of 40 μm or less.

As the silica sol used in the present invention, a silica sol obtained by converting ultrafine silica particles having a particle diameter of 5 nm to 20 nm into a colloid solution is used. For example, Snowtex (a product of Nissan Chemical Industries, Ltd.) is commercially available, and is a 20% to 50% aqueous silica sol as silica (solid content).
Silica has a fineness of 5 to 20 nm, and thus has transparency. A silica sol having a sodium content of 0.2% or less and a stable pH with an alkali is preferred, and those having a pH of 10 or less, preferably 8 to 9 are preferred.

The functional material used in the present invention includes an ultraviolet ray protective agent, a coloring agent, a deodorant, an antibacterial agent, a whitening agent, a humectant,
A cell activator or fragrance. 1. When the functional material is a powder, the following is used. UV protection agents * Organic compounds Oxybenzone, etc. * Inorganic compounds Ultrafine titanium oxide, iron oxide, zinc oxide, etc. Colorants * White pigments Titanium oxide, zinc oxide, zinc sulfide, manganese white, etc. * Black pigments Carbon black, iron black, titanium Black etc. * Red pigment Bengala, cobalt red, molybdenum red etc. * Yellow pigment Ocher, yellow iron oxide, titanium yellow etc. * Green pigment Chromium green, chromium oxide, cobalt green etc. * Blue pigment Ultramarine, navy blue, cobalt blue etc. * Brown pigment Amber, iron oxide, procha tea, etc. * Metal powder Copper powder, gold powder, silver powder, aluminum powder, etc. * Dye red 102, red 202, orange 20
No. 3, Yellow No. 4, Blue No. 204, etc. * Pearl dye Mica titanium, titanium dioxide coated mica, fish scale white, etc. * Photochromic powder Deodorant L Ferrous ascorbate, iron phthalocyanine, etc. Antibacterial agent Silver zeolite, paraben, benzoic acid ,
Sorbic acid, etc. Whitening agent Vitamin C (ascorbic acid), etc. Moisturizer Betaine, collagen, phospholipid, etc. When the functional material is liquid, the following is used. UV protection agents paratylaminodimethyl benzoate (paraben), octyl salicylate, etc. Deodorants Flavans, moisturizers Glycerin, hyaluronic acid hydrate, etc. Cell activators Yeast extract, fermented milk extract, etc. Flavors Lavender, rosemary, hinokitiol, etc. .

Examples of the cosmetics to be used in the present invention include creams, emulsions, lotions, shampoos, foundations, solid white powders, oil cakes, white powders, body powders, perfume powders, and the like. Lipsticks, nail polish, eye shadow, eyebrow, chee rouge, mascara, eyeliner, hair coloring.

One or more of the above-mentioned cosmetic functional materials can be used. Further, a composite material may be used in combination with an antibacterial / antifungal material, talc, kaolin, mica, sericite, zinc stearate, nylon powder, cellulose powder, polymethyl methacrylate, oxybenzone, octyl paradimethylaminobenzoate, and the like. Can be. When the functional material for cosmetics is a powder, the content of the functional material in the granular material of the present invention is preferably 70% by weight or less. When the amount of the functional material of the powder becomes 70% by weight or more, that is, the silica component (solid content in the silica sol) becomes 30% by weight.
% Or less, it is not preferable because the granules are brittle and easily broken.

When the functional material for cosmetics is a colorant, one or two or more colorant components are blended, and the colorant in the powder of the present invention is preferably from 10% by weight to 70% by weight. . If the colorant is less than 10% by weight, the color density, depth, sharpness and vividness are inferior. On the other hand, if the content is more than 70% by weight, the colorant is not sufficiently supported, and the powdery and granular material is fragile and easily broken, which is not preferable as a cosmetic.

In the colored cosmetic according to the present invention, since two or more kinds of coloring agents are fixed to the powdery granules in a ratio as they are mixed, the coloring agent is related to the difference in affinity of the coloring agent for silica. It is fixed without any problems and there is no worry about color breakup, uneven color or separation. In addition, since it is a spherical or donut-shaped powder, the dispersibility of the colored cosmetic and the adhesion to the skin can be kept at the best. The spherical powder does not get stuck or stabbed on the skin, spreads well at the time of application, has a good feel, and has no rough feeling. When removing, it can be easily removed with a remover or the like.

According to the present invention, Japanese Patent Publication No. 28605/1986
Unlike the cosmetics enclosed in the center of the capsule, the coloring agent of the present invention is uniformly mixed and supported with silica and fixed, as in Japanese Patent Publication No. Well, it is clear, there is no loss of depth and it has no pastel color, and there is no loss of color. In addition, 4-5
There is no need to select the suitability according to the difference in the affinity of the coloring agent as in JP-A-572. According to the present invention, the manufacturing process can be simplified and the manufacturing cost can be reduced.

[0035]

Example 1 5 g of ultrafine titanium oxide (TTO-55A, manufactured by Ishihara Sangyo Co., Ltd.), 1 g of yellow iron oxide and 0.3 g of red iron oxide as a coloring agent for coloring skin color were mixed with polyoxyethylene sorbitan oleate (surfactant). Agent) 5g
/ L aqueous solution was mixed and stirred, and ultrasonic waves (27 KHZ) were applied for 30 minutes to obtain a dispersed state of primary particles. Next, Snowtex-20 (silica sol: silica solid content 20 wt.
%, Manufactured by Sankei Kogyo Co., Ltd.), and the mixture was stirred and irradiated with ultrasonic waves (27 KHZ) for 30 minutes to keep the dispersion of the primary particles. The dispersion was sprayed with a nozzle of 25,000 rpm using a compact spray dryer manufactured by Anhydro.
m, at a spraying rate of 250 ml / min into a 200 ° C. atmosphere to obtain a powder. An electron micrograph (80)
0 times and 5000 times) are shown in FIGS. 1 and 2, respectively.

This granular material had a transparent feeling, had good elongation and slippage during use, did not have a conventional feeling problem, and could be easily removed by a remover.

[0037]

Example 2 As a black pigment, 20 g of carbon black and 100 g of iron black (black iron oxide) were mixed with 1 kg of an aqueous solution of 5 g / L of polyoxyethylene sorbitan oleate (surfactant) and agitated with 30 ultrasonic waves (27 KHZ). The dispersion was performed for 1 minute to make the primary particles dispersed. Then Snowtex-
20 kg (silica sol, manufactured by Nissan Chemical Industry Co., Ltd.) was added and stirred, and ultrasonic waves (27 KHZ) were applied for 30 minutes to keep the primary particles dispersed. The dispersion was spray-dried at a nozzle rotation speed of 25,000 rpm and 250 ml /
The powder was sprayed in an atmosphere of 200 ° C. at a spraying rate of min. Electron micrographs (400 × and 40 ×)
00) are shown in FIGS. 3 and 4, respectively.

This powder has a moist and glossy black color, has good elongation at the time of application, and has an excellent feel.
And it was easily removed by the remover.

[0039]

Example 3 230 g of orange No. 204 and 20 g of yellow 205 were mixed with fine crystalline substance 4 of ethyl paraben as an antibacterial agent.
g of water and 2 g of an aqueous solution of 6 g / L of polyoxyethylene sorbitan monooleate (surfactant) were mixed and stirred, and ultrasonic waves (27 KHZ) were applied for 30 minutes to improve dispersion. Next, Snowtex ST-N (silica sol,
2 kg (Nissan Chemical Industry Co., Ltd.) was added and stirred, and ultrasonic waves (27 KHZ) were applied for 30 minutes to keep the dispersion state. This dispersion was sprayed with a spray drier at a nozzle rotation speed of 2
200 ° C at 5,000 rpm, 250ml / min spray rate
To obtain 600 g of colored powdery granules. This powder has good elongation and slip without color breakage, is bright in color, and has antibacterial properties. When removing, it could be easily removed with a remover.

[0040]

Example 4 20 g of Escalol 507 (octyl paradimethylaminobenzoate, product of VanDykCo) was dissolved in 100 g of ethyl alcohol, and ultrafine titanium oxide (TTO-55A, product of Ishihara Sangyo Co., Ltd.) 0.4
g, collagen (moisturizer) 12 g, fresh pine (Flavans deodorant, product of Shirai Matsushin Pharmaceutical Co., Ltd.) 4
g of polyoxyethylene lauryl ether (surfactant) and 2 kg of an aqueous solution of 5 g / L, and the mixture was stirred and subjected to ultrasonic waves (27
KHZ) was applied for 30 minutes to improve the dispersion. Next, 2 kg of Snowtex-20 (silica sol, manufactured by Nissan Chemical Industries, Ltd.) was added and stirred, and ultrasonic waves (27 KHZ) were applied for 30 minutes to maintain a dispersed state. The dispersion was sprayed with a spray drier at a nozzle rotation speed of 25,000 rpm and 250 rpm.
The powder was sprayed at a spray rate of 200 ml / min into an atmosphere at 200 ° C. to obtain a powder having moisture retention and deodorizing properties and having an ultraviolet protection ability.

Since the powder has a transparent feeling, unlike the conventional titanium oxide, it does not have a whitish feeling even when it is applied to the hand or face.

[0042]

Example 5 20 g of titanium yellow and 2 g of cobalt red as a coloring agent, 1 g of lavender as a fragrance, 5 g of Reishi extract as a cell activator, and hyaluronic acid 6 as a humectant
g of polyoxyethylene sorbitan oleate (surfactant) in 1 kg of an aqueous solution of 5 g / L, and the mixture was stirred with ultrasonic waves (2
7KHZ) for 30 minutes to form a dispersed state. Then, 2 kg of Snowtex-20 (silica sol, product of Nissan Chemical Industries, Ltd.) was added and stirred, and ultrasonic waves (27 KHZ) were applied to 30 kg.
Minutes of dispersion were maintained. This dispersion is sprayed with a spray dryer at a nozzle rotation speed of 25,000 rpm and 250 ml.
/ Min at a spraying rate of 200 ° C. to obtain a powder of a composite functional material containing a fragrance.

[Brief description of the drawings]

FIG. 1 is an electron micrograph (× 800) of a powder obtained according to Example 1 of the present invention.

FIG. 2 is an electron micrograph (× 5000) of a powder obtained according to Example 1 of the present invention.

FIG. 3 is an electron micrograph (× 400) of a powder obtained by Example 2 of the present invention.

FIG. 4 is an electron micrograph (× 4000) of a powder obtained by Example 2 of the present invention.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-6-41456 (JP, A) JP-A-3-45660 (JP, A) JP-A-62-81479 (JP, A) JP-A-60-81 226805 (JP, A) (58) Fields studied (Int. Cl. ⁶ , DB name) A61K 7/00-7/50 C01B 33/18

Claims (5)

(57) [Claims] 1. A powder of 40 μm or less, comprising one or more kinds of functional materials for cosmetics and silica, wherein the functional material for cosmetics and silica are mixed in a single powder. Functional granules for cosmetics, wherein the granules are substantially spherical or donut-shaped having an opening or a depression in the center of the surface. 2. One or more kinds of functional materials for cosmetics are powder particles having a particle size of 40 μm or less fixed in a mixed state to silica particles, and the powder particles have an opening or a hole in the center of the surface. A functional powder for cosmetics, which has a substantially spherical or donut shape having a concave portion. 3. The cosmetic according to claim 1, wherein the functional material for cosmetics is any one of an ultraviolet ray protective agent, a coloring agent, a humectant, an antibacterial agent, a whitening agent, a deodorant, a cell activator, and a fragrance. Functional powder and granules. 4. A functional powder for cosmetics, comprising:
Ratio of functional material for cosmetics in functional powder
The functional powder for cosmetics according to claim 1, which is 0% by weight or less. A cosmetic comprising the functional powder for cosmetic according to any one of claims 1 to 4.