JP2007045772A - Cosmetic product for summer season - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic product effective for further improving the UV-protecting action of titanium dioxide. <P>SOLUTION: (1) A clay mineral modified with an organic material and (2) fibrous titanium dioxide are included in a cosmetic product. The clay mineral modified with an organic material is preferably hectorite modified with dimethyl distearyl ammonium chloride and the fibrous titanium dioxide preferably has a hollow tubular form. The cosmetic product preferably contains phenoxyethanol and is preferably free from butylparaben. The cosmetic product is preferably summer season cosmetics. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cosmetic, and more particularly to a cosmetic suitable for a summer cosmetic.

  In recent years, care from ultraviolet rays is becoming an important technology in skin care. This is also due to an increase in the amount of ultraviolet rays transmitted due to the expansion of the ozone hole. In general, care from ultraviolet rays uses ultraviolet rays that suppress ultraviolet rays by using a concealable powder that absorbs ultraviolet rays, such as titanium dioxide, and UV protection that uses ultraviolet absorption by benzophenone derivatives. However, in the protection of ultraviolet rays by titanium dioxide, the influence of radicals on the skin released when titanium dioxide returns from the excited state to the ground state after absorption of ultraviolet rays has recently been a concern and is difficult to use. However, benzophenone derivatives are difficult to use because of concerns such as the presence or absence of endocrine disrupting effects. In other words, it has been desired to develop an ultraviolet protection means that is free of concerns about the skin.

  On the other hand, organically modified clay minerals are general-purpose raw materials for cosmetics, and their combined use with spindle-shaped titanium dioxide is already known. (For example, see Patent Document 1, Patent Document 2, and Patent Document 3) However, the effect is an ultraviolet protective effect without whiteness, and is not an improvement in the quality of the ultraviolet protective effect itself.

  The organically modified clay mineral is known as a gelling component having an emulsifying action, and is used as an emulsifier in a water-in-oil emulsifier form in the cosmetics field. (For example, see Patent Document 4)

  As for fibrous titanium dioxide, its production method is already known, and the possibility of use in cosmetics is also known. (For example, see Patent Document 5 and Patent Document 6)

  On the other hand, cosmetics containing 1) an organically modified clay mineral and 2) fibrous titanium dioxide are not known, and by adopting such a configuration, the ultraviolet protective action of titanium dioxide can be further enhanced. That was completely unknown.

Japanese Patent Laid-Open No. 2003-040738 JP 2000-239119 A Japanese Patent Laid-Open No. 10-212224 JP-A-7-258055 Japanese Patent Laying-Open No. 2005-068001 JP 2004-35362 A

  The present invention has been made under such circumstances, and an object of the present invention is to provide means for further enhancing the ultraviolet protective action of titanium dioxide on the skin.

In view of such a situation, the present inventors have sought for means for further enhancing the ultraviolet protective effect of titanium dioxide on the skin, and as a result of intensive research efforts, 1) organically modified clay minerals, 2 ) It has been found that cosmetics containing fibrous titanium dioxide have such properties and have completed the invention. That is, the present invention is as follows.
(1) A cosmetic comprising 1) an organically modified clay mineral and 2) fibrous titanium dioxide.
(2) The cosmetic according to (1), wherein the organically modified clay mineral is dimethyl distearyl ammonium chloride modified hectorite.
(3) The cosmetic according to (1) or (2), wherein the fibrous titanium dioxide is hollow tubular.
(4) The cosmetic according to any one of (1) to (3), further comprising phenoxyethanol.
(5) The cosmetic according to any one of (1) to (4), which does not contain butylparaben.
(6) The cosmetic according to any one of (1) to (5), which is a summer cosmetic.

  According to the present invention, it is possible to provide means for further enhancing the ultraviolet protective effect of titanium dioxide on the skin.

(1) Organically modified clay mineral which is an essential component of the cosmetic of the present invention The cosmetic of the present invention is characterized by containing an organically modified clay mineral as an essential component. The organically modified clay mineral referred to in the present invention means a material obtained by substituting an ion that becomes the clay mineral with an organic ionizing group in the ionic part of the clay mineral. The anion forming the counter ion with the cation moiety is replaced with an organic anion such as soap anion or alkyl sulfate anion, or the cation forming the counter ion with the anion moiety of the clay mineral is replaced with a quaternary ammonium ion or the like. The cation forming a counter ion with the anion portion of the clay mineral is preferably substituted with a quaternary ammonium ion or the like from the viewpoint of maintaining the stability of the system.

  As such a clay mineral as a base of an organically modified clay mineral, a clay mineral that forms a layer and easily clathrates anions or cations between layers, and is widely used in cosmetics. Preferable examples include montmorillonite, saponite, hectorite, bentonite and the like. By mixing the clay mineral and an aqueous solution of a cationic surfactant or an anionic surfactant in an aqueous carrier and removing the aqueous carrier, the organically modified clay mineral can be produced.

  Anionic surfactants used for such organic modification include fatty acid soaps such as sodium laurate, sodium myristate, sodium palmitate, sodium stearate, sodium behenate, sodium lauryl sulfate, sodium alkylsulfosuccinate, polyoxyethylene Preferable examples include sulfate anions such as sodium lauryl sulfate, and phosphate anions such as sodium lauryl phosphate and sodium polyoxyethylene lauryl phosphate.

  Examples of the cationic surfactant used for such organic modification include stearyl trimethyl ammonium chloride, dimethyl distearyl ammonium chloride, benzyl dimethyl distearyl ammonium chloride, dioctadecyl dimethyl ammonium chloride, octadecyl dimethyl benzyl ammonium chloride, and dihexadecyl dimethyl. Preferred examples include ammonium chloride.

  When the clay mineral is organically modified with the above surfactant, the mass ratio of the surfactant is preferably 1 to 50% by mass with respect to the mass of the clay mineral.

  Such an organically modified clay mineral can be used after being prepared as described above, and since there are already commercially available ones, a commercially available product can be purchased and used. Commercially available products include “Benton 38V” obtained by organic modification of hectorite with dimethyl distearyl ammonium chloride (manufactured by Elementis), “Benton 34” obtained by organic modification of bentonite with dimethyl distearyl ammonium chloride (manufactured by Elementis) ), “Benton 27V” (manufactured by Elementis Co., Ltd.) obtained by organically modifying hectorite with benzyldimethylstearylammonium chloride. Among these, “Benton 38V” is particularly preferable because it is well suited to the cosmetic of the present invention.

  In the cosmetic of the present invention, the organically modified clay mineral can be contained alone or in combination of two or more. The preferable content of the organically modified viscosity mineral in the cosmetic of the present invention is 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, based on the total amount of the cosmetic. . This is because if the amount is too small, the stability may be impaired, and if the amount is too large, the gel becomes too strong, which may impair the usability.

(2) Fibrous titanium dioxide which is an essential component of the cosmetic of the present invention The cosmetic of the present invention contains fibrous titanium dioxide as an essential component. As such fibrous titanium dioxide, tubular titanium dioxide having a cylindrical void at the center portion of the fiber, and solid fibrous dioxide dioxide in which the void portion of the tubular titanium dioxide is closed to become solid. Titanium exists. Although any type of fibrous titanium dioxide can be used in the cosmetic of the present invention, tubular titanium dioxide is particularly preferred. Here, the fibrous form referred to in the present invention means a cylindrical shape having a sufficiently large length with respect to the minor axis, and sufficiently large means at least twice or more.

  Such fibrous titanium dioxide can be produced as follows. That is, tubular titanium dioxide particles can be formed by hydrothermally treating a titanium dioxide sol in the presence of an alkali. By firing this, tubular titanium dioxide is obtained. In the sol, the tubular titanium dioxide particles are prepared and then heat-treated to close the inside of the tubular titanium oxide particles, thereby obtaining fibrous titanium oxide particles having a sufficient length and high crystallinity. If this is fired, it becomes solid fibrous titanium dioxide.

  Some of such fibrous titanium dioxides are already commercially available as cosmetic raw materials, and such commercially available raw materials can be purchased and used. As a commercially available product, “hollow titanium oxide fiber” (manufactured by Catalyst Kasei Kogyo Co., Ltd.), which is hollow fibrous, that is, tubular titanium dioxide, can be particularly preferably exemplified.

  In the cosmetic composition of the present invention, such fibrous titanium dioxide can contain only one species or a combination of two or more species. In the cosmetics of the present invention, such components are responsible for the main part of the UV protection action, and in order to achieve such effects, the amount varies depending on the type of preparation and the purpose of UV protection. On the other hand, it is preferable to contain 0.005-30 mass% in total amount. Speaking of the types of preparations, powder-containing cosmetics such as foundations were applied on top, such as under-makeup cosmetics and control colors, and the purpose of UV protection could not be prevented by the powder-containing cosmetics. When applied to a base cosmetic, which is protection from ultraviolet rays or from the effects of light absorption of the powder cosmetic, 0.005 to 1 mass%, more preferably 0.01 to 0.5. It is contained by mass%. When applied to a foundation or ultraviolet protective cosmetic for the purpose of preventing direct ultraviolet rays from reaching the skin, it is contained in an amount of 0.5 to 30% by mass, more preferably 2 to 20% by mass.

(3) Cosmetics of this invention The cosmetics of this invention contain the said essential component, It is characterized by the above-mentioned. As the cosmetics of the present invention, those having a protective action against ultraviolet rays are preferable, and make-up intended for cosmetic effects such as under-makeup cosmetics, base cosmetics such as control colors, foundations, pressed powders, loose powders, etc. Cosmetics, UV protective cosmetics and the like can be said to be preferable applied preparations. The cosmetic of the present invention can be applied without particular limitation as long as it is a dosage form usually used in cosmetics, for example, solid white powder dosage form, loose powder dosage form, oil-in-water emulsifier form, water-in-oil emulsifier form It is particularly preferable to apply to a water-in-oil emulsifier form. Moreover, since the cosmetics of this invention are excellent in the effect | action which suppresses the influence of the ultraviolet-ray to skin, it is preferable to apply to the summer cosmetics used at the time with much ultraviolet rays.

  In the cosmetic of the present invention, in addition to the above essential components, optional components generally used in the field of cosmetics can be contained within a range not impairing the effects of the present invention. Such optional ingredients include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, hydrogenated coconut oil Oil, wax, oil such as beeswax, canola wax, carnauba wax, ibotarou, lanolin, reduced lanolin, hard lanolin, jojoba wax, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum , Hydrocarbons such as microcrystalline wax; higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid; cetyl alcohol, stearyl alcohol, isostearyl Higher alcohols such as alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol; cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, malic acid Diisostearyl, di-2-ethylhexanoic acid ethylene glycol, dicaprate neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, tri Synthetic ester oils such as trimethylolpropane isostearate and pentane erythritol tetra-2-ethylhexanoate; dimethylpolysiloxane, methylphenylpoly Linear polysiloxanes such as oxane and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexanesiloxane; amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, Oil agents such as silicone oils such as modified polysiloxanes such as fluorine-modified polysiloxanes; Anionic surfactants such as fatty acid soap (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, triethanolamine ether of alkyl sulfates; Cationic surfactants such as stearyltrimethylammonium, benzalkonium chloride, laurylamine oxide; imidazoline-based amphoteric surfactants (2-cocoyl-2-imida Zolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaine, amide betaine, sulfobetaine, etc.), and amphoteric surfactants such as acylmethyltaurine; sorbitan fatty acid esters (sorbitan) Monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (glyceryl monostearate, etc.), propylene glycol fatty acid esters (propylene glycol monostearate, etc.), hardened castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters (POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbitol monolaurate, etc.), POE glycerin fatty acid ester Tells (POE-glycerol monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether, etc.), POE alkyl phenyl ethers (POE nonylphenyl) Ethers, etc.), Pluronic types, POE / POP alkyl ethers (POE / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), Nonionic surfactants such as sucrose fatty acid ester and alkyl glucoside; polyethylene glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene Polyhydric alcohols such as recall, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexanediol, 1,2-hexanediol, 1,2-octanediol; sodium pyrrolidonecarboxylate Moisturizing ingredients such as lactic acid and sodium lactate; powders such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, anhydrous silicic acid (silica), aluminum oxide, barium sulfate, etc. whose surface may be treated Body, surface may be treated, bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, non-fibrous titanium oxide, zinc oxide inorganic pigments; surface treated Pearls such as titanium mica, fish phosphorus foil, bismuth oxychloride; red that may be raked Color 202, Red 228, Red 226, Yellow 4, Blue 404, Yellow 5, Red 505, Red 230, Red 223, Orange 201, Red 213, Yellow 204, Yellow 203 No. 1, Blue No. 1, Green No. 201, Purple No. 201, Red No. 204, etc .; Organic powders such as polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer; Paraaminobenzoic acid ultraviolet rays Absorber; Anthranilic acid ultraviolet absorber; Salicylic acid ultraviolet absorber; Cinnamic acid ultraviolet absorber; Benzophenone ultraviolet absorber; Sugar ultraviolet absorber; 2- (2′-hydroxy-5′-t- UV absorbers such as octylphenyl) benzotriazole, 4-methoxy-4′-t-butyldibenzoylmethane; ethanol, isoprop Lower alcohols such as diol; vitamin B such as vitamin A or its derivative, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or its derivative, vitamin B12, vitamin B15 or its derivative; α- Preferred examples include vitamin E such as tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin D, vitamin H, pantothenic acid, panthetin, pyrroloquinoline quinone, and the like; and antibacterial agents such as phenoxyethanol. .

  As a particularly preferred form, since it is administered to highly probable skin that has been exposed to ultraviolet radiation that is susceptible to irritation, it does not contain parabens, especially components that tend to cause transient irritation such as butylparaben It is a form. As a preservative replacing these parabens, it is preferable to contain 0.1 to 0.5% by mass of phenoxyethanol.

  Hereinafter, the present invention will be described in more detail with reference to examples, but it goes without saying that the present invention is not limited to such examples.

  Under makeup (water-in-oil emulsifier form) which is a cosmetic of the present invention was prepared according to the formulation shown below. That is, the components (a), (b) and (c) are heated to 80 ° C., the component (d) is dispersed in the component (a), the component (b) is added and kneaded, and the components (c) are gradually added to the mixture with stirring. The mixture was emulsified and cooled with stirring to obtain Under Makeup 1. Comparative example in which “Benton 38V” was replaced with “Silicone KSG-210” (polyether-modified methylsiloxane; manufactured by Shin-Etsu Chemical Co., Ltd.), a surfactant for water-in-oil emulsification, by the same operation. 1. Comparative Example 2 in which “hollow titanium fiber” is replaced with fine particle titanium dioxide (average particle size 0.01 μm), “Benton 38V” is “silicone KSG-210” (polyether-modified methylsiloxane; manufactured by Shin-Etsu Chemical Co., Ltd.) In addition, Comparative Example 3 in which “hollow titanium fiber” was replaced with fine particle titanium dioxide (average particle size 0.01 μm) was also prepared.

"Silicone KSG210" 3% by mass
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
"Silicone KF6017" 3 mass%
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
Dimethicone 8% by mass
Cyclomethicone 13.5% by mass
Sucrose stearate monoester 0.5% by mass
1,3-butanediol 10% by mass
Phenoxyethanol 0.5% by mass
Ha water 56.08 mass%
Magnesium sulfate 0.5% by mass
Two-particulate titanium dioxide (average particle size 0.01 μm) 3% by mass
"Oil sensor powder" 0.1% by mass
(Zinc coordination pillared clay; manufactured by Daito Kasei Co., Ltd.)
"Chimiron Splendid Red" 0.1% by mass
(Iris foil (red); made by Engelhard)
"Benton 38V" 1.5% by mass
(Dimethyl distearyl ammonium chloride modified hectorite; manufactured by Elementis)
"Cover leaf AR-80" 0.1% by mass
(Powder in which talc is sequentially coated with titanium dioxide and silica alumina; manufactured by Catalyst Kasei Kogyo Co., Ltd.)
Silica (average particle size 50 μm) 0.1% by mass
"Hollow titanium oxide fiber" 0.02% by mass

<Test Example 1>
Five 2cm x 4cm sites are provided on the inner forearm of three panelists, one site is the non-administration site, one site is the undermakeup 1 site, 1 site is the comparative example 1 site, and 1 site is the comparative example Two administration sites and the remaining one site were used as the administration sites of Comparative Example 3. Each site was irradiated with 1.5 MED ultraviolet light for 24 hours before sample administration to cause mild inflammation (± degree of inflammation according to the following criteria), 50 mg of the sample was administered thereto, and ultraviolet light was irradiated with 5 MED. The SPF value of these samples measured with an ultraviolet ray measuring device UV-1000S (manufactured by Labsphere) is 15, and the above-mentioned irradiation has a very low probability of causing inflammation and the skin reaction is thought to be enhanced. I can't. Skin reaction was determined according to the following criteria 24 hours after irradiation. The results are shown in Table 1. From this, it can be seen that the cosmetic of the present invention further enhances the ultraviolet protective effect of titanium dioxide.

(Criteria: Japanese patch test criteria)
-: No response ±: Response with suspicious erythema +: Response with clear erythema +++: Response with edema and papules

  In the same manner as in Example 1, Foundation 1 as a cosmetic of the present invention was prepared according to the following formulation. When this was evaluated by the same procedure as in Test Example 1 of Example 1, all three cases were-(no reaction). It is presumed that the same effect is produced.

"Silicone KSG210" 3% by mass
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
"Silicone KF6017" 3 mass%
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
Dimethicone 8% by mass
Cyclomethicone 13.5% by mass
Sucrose stearate monoester 0.5% by mass
1,3-butanediol 10% by mass
Phenoxyethanol 0.5% by mass
Water 46.1% by mass
Magnesium sulfate 0.5% by mass
D "Oil sensor powder" 0.1% by mass
(Zinc coordination pillared clay; manufactured by Daito Kasei Co., Ltd.)
"Chimiron Splendid Red" 0.1% by mass
(Iris foil (red); made by Engelheart)
"Benton 38V" 1.5% by mass
(Dimethyl distearyl ammonium chloride modified hectorite; manufactured by Elementis)
"Cover leaf AR-80" 0.1% by mass
(Powder in which talc is sequentially coated with titanium dioxide and silica alumina; manufactured by Catalyst Kasei Kogyo Co., Ltd.)
Silica (average particle size 50 μm) 0.1% by mass
"Hollow titanium oxide fiber" 3% by mass
Bengala 1 mass%
Yellow iron oxide 5% by mass
Sericite 4% by mass

  In the same process as in Example 1, an under-makeup 2 that is a cosmetic of the present invention was prepared according to the following formulation. When this was evaluated by the same procedure as in Test Example 1 of Example 1, all three cases were-(no reaction). It is presumed that the same effect is produced.

"Silicone KSG210" 3% by mass
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
"Silicone KF6017" 3 mass%
(Polyether-modified methylpolysiloxane; manufactured by Shin-Etsu Silicone Co., Ltd.)
Dimethicone 8% by mass
Cyclomethicone 13.5% by mass
Sucrose stearate monoester 0.5% by mass
1,3-butanediol 10% by mass
Phenoxyethanol 0.5% by mass
Ha water 56.1% by mass
Magnesium sulfate 0.5% by mass
D "Oil sensor powder" 0.1% by mass
(Zinc coordination pillared clay; manufactured by Daito Kasei Co., Ltd.)
"Chimiron Splendid Red" 0.1% by mass
(Iris foil (red); made by Engelhard)
"Benton 34" 1.5% by mass
(Dimethyl distearyl ammonium chloride modified hectorite; manufactured by Elementis)
"Cover leaf AR-80" 0.1% by mass
(Powder in which talc is sequentially coated with titanium dioxide and silica alumina; manufactured by Catalyst Kasei Kogyo Co., Ltd.)
Silica (average particle size 50 μm) 0.1% by mass
"Hollow titanium oxide fiber" 1.5% by mass
Fine particle titanium oxide (particle size 0.01 μm) 1.5 mass%

  The present invention can be applied to makeup cosmetics.

Claims (6)

1. A cosmetic comprising 1) an organically modified clay mineral and 2) fibrous titanium dioxide. The cosmetic according to claim 1, wherein the organically modified clay mineral is dimethyl distearyl ammonium chloride modified hectorite. The cosmetic according to claim 1 or 2, wherein the fibrous titanium dioxide has a hollow tubular shape. The cosmetic according to any one of claims 1 to 3, further comprising phenoxyethanol. The cosmetic according to any one of claims 1 to 4, wherein the cosmetic does not contain butylparaben. The cosmetic according to any one of claims 1 to 5, wherein the cosmetic is a summer cosmetic.