JPH069359A - Ultraviolet ray-shielding powder - Google Patents

Abstract

(57) [Summary] [Structure] An ultraviolet blocking powder obtained by treating the surface of a powder for cosmetics with a surfactant and an ultraviolet absorbing compound, and a cosmetic containing the same. [Effect] The UV blocking powder and cosmetics have an excellent UV blocking function, and are superior in stability and handleability of the UV absorbing substance as compared with those obtained by directly adding the UV absorbing compound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a UV-screening powder, and more specifically, it contains a UV-absorbing agent in the lipophilic portion of a plurality of surfactant layers on the surface of a powder for cosmetics, and has a UV-blocking effect. The present invention relates to a UV-blocking powder having high safety and excellent safety.

[0002]

2. Description of the Related Art Ultraviolet rays in the sun's rays are commonly called "sunburn".
In addition to causing skin inflammation called elasticity, it destroys collagen and other fibers in the dermis that give elasticity to the skin, causing wrinkles and sagging of the skin, and increasing melanin pigment in the skin. , Causes deposits and causes stains. Further, since a causal relationship between ultraviolet rays and skin cancer has been confirmed, various protective measures have been devised for the purpose of preventing excessive irradiation, and conventionally, various external preparations and cosmetics for sun protection have been proposed. Came.

The conventional ultraviolet blocking methods are broadly classified. A method of scattering ultraviolet rays to prevent the influence of ultraviolet rays by mixing an ultraviolet ray blocking agent having an ultraviolet ray blocking effect such as powder, and a characteristic of absorbing ultraviolet rays. There is a method of reducing the influence of ultraviolet rays on the skin by adding an ultraviolet absorbing compound having

[0004]

However, although an ultraviolet blocking agent such as powder can block a part of ultraviolet rays, its blocking rate is not so high that its blocking effect is insufficient or it cannot be blocked. If a large amount is blended in order to increase the rate, there is a problem that a thick layer is formed at the time of application and a problem remains in terms of usability.

As the ultraviolet absorbing compound, aromatic organic compounds are generally known. However, since these compounds are hydrophobic, they may be inconvenient to handle depending on the form of the cosmetic to be blended. there were.

[0006]

Under such circumstances, the present inventors have conducted earnest research to solve the drawbacks of the above-mentioned conventional ultraviolet blocking agents and ultraviolet absorbing compounds, and as a result, cosmetic powders have been obtained. Ultraviolet-shielding powder obtained by treating the body surface with a surfactant and an ultraviolet-absorbing compound has an excellent ultraviolet-absorbing effect, and is also found to be excellent in handleability and stability, The present invention has been completed.

That is, the present invention provides an ultraviolet blocking powder obtained by treating the surface of a cosmetic powder with a surfactant and an ultraviolet absorbing compound, and a cosmetic containing the same.

The powder for cosmetics used in the present invention is not particularly limited as long as it is a powder generally used in the field of cosmetics and external preparations for skin, and specifically, for example, the surface is hydrophilic. Silica (silicon dioxide), titanium oxide, talc, calcium carbonate, ceramic powder, sericite, magnesium silicate, silicic acid anhydride, red iron oxide, black iron oxide, mica, alumina, zinc oxide, yellow iron oxide, zirconium oxide, Gunjou , Ingredients such as konjac, magnesium carbonate, chromium oxide, vermiculite, kaolin, aluminum oxide, carbon black, diatomaceous earth, gypsum powder, barium sulfate, frustonite, titanium mica, bismuth oxyoxide, polymethylmethacrylate powder, Raw materials such as polyethylene powder, nylon powder, silk powder, hemp fiber and cotton fiber Cellulose powder, starch powder, organic material powders such as fish scale foil and the like. In the present invention, these cosmetic powders can be used alone or in combination of two or more kinds.

Further, in the present invention, the surfactant used for the surface treatment of the above-mentioned cosmetic powder may be any one generally used in the fields of cosmetics and external preparations for skin.
There is no particular limitation, and any of cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric surfactants can be used.

Specifically, the following surfactants are listed. Examples of the cationic surfactant include alkyl quaternary ammonium surfactants such as octadecyltrimethylammonium chloride and dicetyldimethylammonium chloride.

Examples of the anionic surfactant include metal soaps such as zinc stearate, zinc palmitate and aluminum stearate.

Examples of nonionic surfactants include polyglycerol fatty acid ester surfactants such as decaglyceryl distearate and diglyceryl dioleate; polyoxyethylene (EO = 40) monostearate and polyoxy. Polyethylene glycol such as ethylene (EO = 25) monostearate (EO = 3 to 6)
0) fatty acid ester-based surfactant; polyoxyethylene (EO = 2 to 40) phytosterol such as polyoxyethylene (EO = 10) phytosterol, polyoxyethylene (EO = 20) phytosterol, etc. -Based surfactant; polyoxyethylene (EO = 20) polyoxypropylene (PO = 4) cetyl ether,
Polyoxyethylene (EO = 30) Polyoxypropylene (PO = 6) Polyoxyethylene (EO = 0 to 60) Polyoxypropylene (PO = 0) such as decyl tetradecyl ether 0-20) Alkyl ether type surfactant; polyoxyethylene (EO = 40)
Hydrogenated castor oil, polyoxyethylene (EO = 60)
Polyoxyethylene such as hydrogenated castor oil (EO = 1 to
200) hydrogenated castor oil-based surfactant; polyoxyethylene (EO = 20) sorbitan monostearate, polyoxyethylene (EO = 20) sorbitan monooleate, polyoxyethylene (EO. = 20) sorbitan trioleate and other polyoxyethylenes (E.
O. = 5 to 45) sorbitan fatty acid ester-based surfactant; polyoxyethylene (EO = 24) cholesteryl, polyoxyethylene (EO = 50) cholesteryl, and other polyoxyethylene (EO = 3) -100) cholesteryl-based surfactants and the like.

Examples of the amphoteric surfactant include phospholipid-based surfactants, and specific examples thereof include phosphatidylcholine, phosphatidylinositol, phosphatidylethanolamine, phosphatidylserine and phosphatidyserine. Fatidylglycerol, sphingomyelin, lysophosphatidylcholine, lysophosphatidylinositol, lysophosphatidylethanolamine, lysophosphatidylglycerol, and hydrogenated products and mixtures thereof, and soybean lecithin derived from animals and plants, So-called natural lecithin such as egg yolk lecithin, natural phospholipids such as purified products thereof; modified products obtained by subjecting natural phospholipids to enzyme treatment or hydrogenation treatment; distearoylphosphatidylcholine, dipalmitoylphosphatidylcholine, etc. Synthetic phosphate Or the like can be used.

In the present invention, when the surface of the cosmetic powder is anionic, a cationic surfactant or nonionic surfactant among the above surfactants is used in terms of affinity. On the contrary, when the surface of the cosmetic powder is cationic, it is preferable to use an anionic surfactant or a nonionic surfactant.

In the present invention, these surfactants can be used alone or in combination of two or more, and the amount of the surfactant used is 0.1 to 30% by weight based on the cosmetic powder.
(Hereinafter, simply indicated by%), particularly preferably 1 to 15%.

Further, in the present invention, as the ultraviolet absorbing compound, any of those having so-called A wave absorbing property, B wave absorbing property, and both A wave absorbing property and B wave absorbing property can be used. it can.

Specifically, p-aminobenzoic acid, ethyl p-aminobenzoate, isobutyl p-aminobenzoate, p
-Octyl aminobenzoate, ethylhexyl p-aminobenzoate, glycerin p-aminobenzoate, ethylhexyl p-dimethylaminobenzoate, p-aminobenzoic acid esters such as amyl p-dimethylaminobenzoate, salicylic acid, phenyl salicylate, Salicylic acid p-ter
t-Butylphenyl, benzyl salicylate, salicylates such as homomenthyl salicylate, menthyl anthranilate, umbelliferone, esculin, benzyl cinnamate, sinoxalate, guaizulene, urocanic acid, 2- (2'-hydroxy-5'- Methylphenyl) benzotriazole, esters such as ethyl urocanate, oxybenzone, dioxybenzone, octabenzone, cihydroxydimethoxybenzophenone, thrisobenzone, benzoresorcinol, 2-hydroxy-4
-Methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-methoxy-4'-tert-butyl-dibenzoylmethane (parsol 1789), 2,2'-4,4'-tetrahydroxy Benzophenone, 2,4-dihydroxybenzophenone, isopropyl-p-methoxycinnamate, octyl-p-methoxycinnamate, 2-ethoxyethyl-p-methoxycinnamate, 2-ethylhexyl-p
-Methoxycinnamate, methyl hesperidin, ethyl-2-cyano-3,3-diphenyl acrylate, 2-
Examples thereof include ethylhexyl-2-cyano-3,3-diphenyl acrylate, N, N-dimethyl-p-aminobenzoic acid amyl ester, N, N-dimethyl-p-aminobenzoic acid octyl ester, and homomenthyl salicylate.

In the present invention, these ultraviolet absorbing compounds can be used alone or in combination of two or more, and the amount thereof used is 0.01% based on the powder for cosmetics.
.About.50%, particularly preferably 0.1% to 20%.

The UV blocking powder of the present invention is prepared by mixing the above-mentioned cosmetic powder, surfactant and UV absorbing compound in purified water and heating to 40 to 80 ° C., preferably 50 ° C. , Ultrasonic waves, stir and mix with a homogenizer, etc.,
Then, the powder is separated by filtration or centrifugation, washed with water and dried.

The ultraviolet blocking powder of the present invention thus obtained has a two-layered film of a surfactant or a multi-layered film of a plurality of two-layered films formed on the surface of a powder for cosmetics. It has a structure in which an ultraviolet absorbing compound exists in a lipophilic portion between the membranes. Therefore, when the ultraviolet blocking powder of the present invention is applied to the skin, the ultraviolet absorbing compound does not come into direct contact with the skin.

Further, the ultraviolet absorbing compound incorporated in the lipophilic portion between the layered films is stably present. That is, in the stability test in an aqueous solution, the ultraviolet blocking powder according to the present invention retained a stable ultraviolet blocking ability for a long period of time without the ultraviolet absorbing compound being eluted in the aqueous solution.

Further, it was confirmed that the UV-blocking powder of the present invention has excellent UV-absorption characteristics as compared with the case where the corresponding UV-absorbing compound is used alone.

Further, the UV-blocking powder of the present invention dissolves other lipophilic substances in the lipophilic part of the surfactant layered film on the surface of the powder for cosmetics, as long as the effect of the present invention is not impaired. This fat-soluble substance may include dyes, fragrances, preservatives, stabilizers, particularly film structure stabilizers, fat-soluble vitamins and fats and oils.

The cosmetic of the present invention preferably contains 0.01 to 95% of the above ultraviolet ray blocking powder. In addition to the above-mentioned essential components, the cosmetic composition of the present invention may contain, if necessary, components that are contained in ordinary cosmetic compositions. For example, solid / semi-solid oil components such as petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax, candelilla wax, higher fatty acids and higher alcohols; squalane, liquid paraffin, ester oil, diglyceride,
Liquid oil components such as triglyceride and silicone oil; Fluorine-based oil agents such as perfluoropolyether, perfluorodecalin and perfluorooctane; water-soluble and oil-soluble polymers, surfactants, inorganic and organic pigments, metallic soap treatment or silicone treatment Inorganic and organic pigments, coloring agents such as organic dyes, ethanol, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling sensation agents, Antiperspirants, bactericides, skin activators and the like can be added within the qualitative and quantitative ranges that do not impair the purpose and effects of the present invention.

The cosmetics of the present invention can be produced according to a usual method, and can be applied not only to various cosmetics but also to any quasi-drugs, pharmaceuticals, toiletry products and the like to be applied to the skin. It can be applied, and its form is not particularly limited, such as cream, liquid, emulsion and solid.

[0026]

EXAMPLES The present invention will be described in detail below with reference to examples.

Example 1 Production of UV-blocking powder of the present invention: Powders for cosmetics, surfactants and UV-absorbing compounds and other additives shown in Table 1 and Table 2 were mixed with purified water to prepare 60 The mixture was stirred for 30 minutes under heating at ℃. Then, the powder was collected by filtration, washed with water, and dried to obtain the ultraviolet blocking powder of the present invention.

[0028]

[Table 1]

[0029]

[Table 2]

Example 2 Confirmation of multi-layered film of surfactant on the surface of cosmetic powder: 1.5 g of silica powder is dispersed in 20 ml of purified water.
To this, 0.075 g of 4-methoxy-4′-tert-butyldibenzoylmethane and 0.08 g of dioctadecyldimethylammonium chloride were added and stirred at 50 ° C.,
First, a film of a surfactant is formed on the powder surface, the affinity for water is lost, and the powder agglomeration phenomenon is observed.

Further, when 0.08 g of dioctadecyldimethylammonium chloride was added and stirring was continued, a layer of a surfactant film was further formed on the outer side, and a redispersion phenomenon of the powder was observed.

Further, observing the zeta potential at this time with time, it was found that what was (-) when only the powder was dispersed in water was that an odd number of layered films were formed and the surfactant was (± 0) at the point when the lipophilic part of (3) comes into contact with water and the agglomeration phenomenon of the powder is observed. Furthermore, when a surfactant is added to form an even number of layered films and the hydrophilic portion of the surfactant comes into contact with water and redispersion occurs,
The zeta potential becomes (+).

From these facts, it was confirmed that a multi-layered film of a surfactant was formed on the surface of the cosmetic powder.

Example 3 UV blocking test: The UV blocking rate was measured for the products (13) and (14) of the present invention having the compositions shown in Table 2 and produced in the same manner as in Example 1. As comparative products, (1), (2) those containing no ultraviolet absorbing compound, (3) non-addition of surfactant,
(4) Only a mixture of an ultraviolet absorbing compound and a surfactant was used without using the powder for cosmetics as a carrier, and (5) only water was used.

The measurement method was as follows. A test sample was mixed with an equal amount of the base liquid, and this was spread on a transparent quartz plate to a thickness of 40 μm, and after drying, the UV blocking rate was measured for A wave and B wave. . The results are shown in Table 3. As a result, the product of the present invention had higher ultraviolet absorption characteristics than powders, ultraviolet absorbing compounds and mere mixtures thereof. The formulation of the base liquid is: liquid paraffin 10%, cetanol 3%, sorbitan monostearate 2%, POE (20) sorbitan monostearate 2%, 1,3-butylene glycol 10
%, The remaining amount of purified water.

[0036]

[Table 3]

Example 4 Stability Test of UV Blocking Effect with Time 1: The filtrate at the time of preparing the product (14) of the present invention and the product (14) of the present invention
At the time of preparation, the UV blocking rate was measured for the filtrate filtered after standing for 1 week at 40 ° C. as an aqueous solution without filtration and for the comparative product (5). The results are shown in Table 4. From this, it is understood that most of the ultraviolet absorbing compounds formulated are stably incorporated in the powder of the present invention.

[0038]

[Table 4]

Example 5 Stability Test 2 of UV Blocking Effect: Immediately after preparation of the product (14) of the present invention, after storage at 40 ° C. for 1 week,
The UV blocking rate after storage at 5 ° C for 1 week was measured. The results are shown in Table 5. From this, it is understood that the ultraviolet blocking powder of the present invention is also excellent in stability over time.

[0040]

[Table 5]

[0041]

Table 6 Example 6 Lotion (Composition) (1) UV blocking powder (Invention product (9)) 1 (%) (2) Ethanol 4 (3) 1,3-Butylene glycol 3 (4) Paraben 0.05 (5) Perfume 0.1 (6) Polyoxyethylene hydrogenated castor oil 0.5 (7) Purified water Remaining amount (1) to (7) were mixed to obtain a lotion.

[0042]

Table 7 Example 7 Beauty essence (composition) (1) UV blocking powder (product (10) of the present invention) 10 (%) (2) Xanthan gum 0.4 (3) Sodium hyaluronate 0.05 (4) ) Ethanol 5 (5) Glycerin 2 (6) Paraben 0.05 (7) Perfume 0.05 (8) Polyoxyethylene sorbitan monooleate 0.5 (9) Purified water Remaining amount (1) to (9) The mixture was mixed to obtain a serum.

[0043]

Table 8 Example 8 Cream (Composition) (1) UV blocking powder (Product (1) of the present invention) 8 (%) (2) Liquid paraffin 23 (3) Octyldodecyl myristate 5 (4) Vaseline 6 (5) Beeswax 5 (6) Stearic acid 2 (7) Cetanol 1 (8) Sorbitan monostearate 3 (9) Polyoxyethylene sorbitan monostearate 3 (10) 1,3-Butylene glycol 2 (11) Ascorbic acid Phosphoric acid ester magnesium salt 1 (12) Paraben 0.2 (13) Sodium hyaluronate 0.01 (14) Perfume 0.1 (15) Purified water Remaining amount (2) to (13) and (15) at 70 ° C. Emulsify with
After cooling, (1) and (14) were mixed at 50 ° C. and cooled to room temperature to obtain a cream.

[0044]

Table 9 Example 9 Emulsion (Composition) (1) UV blocking powder (Product (11) of the present invention) 6 (%) (2) Stearic acid 2 (3) Liquid paraffin 3 (4) Sorbitan monostearate 2 (5) Polyoxyethylene sorbitan monostearate 2 (6) Paraben 0.1 (7) Glycerin 3 (8) Perfume 0.1 (9) Purified water Remaining amount (2) to (8) are mixed at 70 ° C. After emulsification and cooling, (1) and (9) were mixed at 50 ° C. and cooled to room temperature to obtain an emulsion.

[0045]

Table 10 Example 10 Solid white powder (composition) (1) Ultraviolet ray blocking powder (product (4) of the present invention) 10 (%) (2) Titanium oxide 10 (3) Zinc oxide 2 (4) Kaolin 41. 7 (5) Talc 20 (6) Yellow iron oxide 1 (7) Red iron oxide 0.2 (8) Self-emulsifying glycerin monostearate 5 (9) Liquid paraffin 6 (10) Glycerin 4 (11) Perfume 0.1 ( 2) to (10) were mixed at 70 ° C., and after cooling, (1) and (11) were mixed at 60 ° C. and cooled to room temperature to obtain a solid white powder.

[0046]

Table 11 Example 11 Lipstick (composition) (1) UV blocking powder (product (5) of the present invention) 6 (%) (2) beeswax 10 (3) ceresin 18.7 (4) carnauba wax 8 (5) ) Lanolin 10 (6) Fluid Pasafin 22 (7) Castor oil 21 (8) Titanium oxide 1 (9) Red No. 201 1 (10) Red No. 202 2 (11) Paraben 0.1 (12) β-Carotene 0.1. 1 (13) Perfume 0.1 (2) to (12) were mixed at 70 ° C, and after cooling, (1) and (13) were mixed at 60 ° C and cooled to room temperature to obtain a lipstick.

[0047]

Table 12 Example 12 Foundation (composition) (1) UV blocking powder (product (2) of the present invention) 10 (%) (2) Stearic acid 2 (3) Self-emulsifying glycerin monostearate 3 (4) ) Liquid paraffin 4 (5) 1,3-butylene glycol 6 (6) triethanolamine 0.4 (7) paraben 0.2 (8) kaolin 8 (9) titanium oxide 8 (10) red iron oxide 0.5 (11) ) Yellow iron oxide 2 (12) Black iron oxide 0.1 (13) Perfume 0.1 (14) Purified water Remaining amount (2) to (12) and (14) are mixed at 70 ° C, and after cooling, 60 ° C Then, (1) and (13) were mixed and cooled to room temperature to obtain a foundation.

[0048]

Table 13 Example 13 Oily white powder (composition) (1) UV blocking powder (product of the present invention (3)) 10 (%) (2) Liquid paraffin 26.5 (3) Ceresin 5 (4) Vaseline 45 (5) Solid paraffin 6 (6) Titanium oxide 5 (7) Yellow iron oxide 2 (8) Red iron oxide 0.4 (9) Perfume 0.1 Mix (1) to (8) at 70 ° C., and after cooling , (9) were mixed at 60 ° C. and cooled to room temperature to obtain an oily white powder.

[0049]

Table 14 Example 14 Cheek red (composition) (1) UV blocking powder (product (6) of the present invention) 20 (%) (2) talc 63.7 (3) titanium oxide 4 (4) stearic acid Zinc 5 (5) Magnesium carbonate 2 (6) Liquid paraffin 3 (7) Red No. 201 1 (8) Red No. 202 1 (9) Yellow No. 401 0.2 (10) Perfume 0.1 (2) to (9 ) Was mixed at 70 ° C., and after cooling, (1) and (10) were mixed at 60 ° C., and the mixture was cooled to room temperature to obtain cheek red.

[0050]

Table 15 Example 15 Eye shadow (composition) (1) UV blocking powder (product of the invention (2)) 50 (%) (2) UV blocking powder (product of the invention (4)) 20 ( 3) Ultraviolet ray blocking powder (product of the present invention (7)) 1 (4) Liquid paraffin 5 (5) 1,3-butylene glycol 5 (6) Black iron oxide 2 (7) Mica 5 (8) Gunjo 6. 79 (9) Titanium oxide 5 (10) Paraben 0.1 (11) Butylhydroxytoluene (BHT) 0.01 (12) Perfume 0.1 (4) to (11) are mixed at 70 ° C., and after cooling, (1) to (3) and (12) were mixed at 60 ° C and cooled to room temperature to obtain an eye shadow.

[0051]

Table 16 Example 16 Sunscreen cream (composition) (1) UV blocking powder (product (1) of the present invention) 10 (%) (2) Diethylene glycol monostearate 2 (3) Octyldodecyl myristate 4 ( 4) Stearic acid 3 (5) Cetanol 0.5 (6) Triethanolamine 1 (7) Lauryl sulfate triethanolamine 0.5 (8) Titanium oxide 3 (9) Paraben 0.1 (10) Perfume 0.1 (11) Purified water Remaining amount (2) to (9) and (11) are mixed and emulsified at 70 ° C, and after cooling, (1) and (10) are mixed at 60 ° C, and the mixture is cooled to room temperature to prevent sunscreen. Got the cream.

[0052]

INDUSTRIAL APPLICABILITY The UV-blocking powder of the present invention has excellent UV-blocking effect and stability, is easier to handle as compared with one to which a UV-absorbing compound is directly added, and is a direct skin of UV-absorbing substance. Contact can be prevented and the ultraviolet absorption function is not reduced. In addition, the cosmetic composition containing the ultraviolet blocking powder of the present invention has an excellent feeling of use and an ultraviolet blocking effect.

Claims (2)

[Claims] 1. An ultraviolet-blocking powder obtained by treating the surface of a cosmetic powder with a surfactant and an ultraviolet-absorbing compound. 2. A cosmetic comprising the ultraviolet blocking powder according to claim 1.