JPH11349469A - Ultraviolet-shielding cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject ultraviolet-shielding cosmetic that has excellent ultraviolet-shielding effect and anti-inflammatory action and is useful as a sun- screening agent, cosmetic foundation, milky lotion and the like by adding hibiscus extract thereto. SOLUTION: The flowers of hibiscus or their dried products are extracted with a water-soluble solvent selected from water, alcohols, polyhydric alcohols or their mixture (for example, ethanol-water mixture or the like) and the resultant hibiscus extract is added to a cosmetic preferably in an amount of 0.01-3 wt.% on the solid basis of the whole amount of the cosmetic. In a preferred embodiment, this cosmetic contains silicone surface-treated fine particles of ultraviolet-shielding metal oxide having an average primary particle size of 5-100 nm (for example, fine particles of zinc oxide) and an organic ultraviolet absorber, for example, 4-tert.-butyl-4'-methoxybenzoylmethane or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an ultraviolet protective cosmetic having an excellent ultraviolet protective effect. More specifically, the present invention relates to an ultraviolet protective cosmetic having an excellent ultraviolet protective effect by containing a hibiscus extract which is a naturally derived component and has an excellent ultraviolet absorbing ability and an anti-inflammatory effect. Also, the present invention relates to an ultraviolet protection cosmetic having a further excellent ultraviolet protection effect by using a hibiscus extract and a component having an ultraviolet protection effect in combination.

[0002]

2. Description of the Related Art Hibiscus extracts are known to have a strong anti-inflammatory effect as disclosed in JP-A-57-99517 and JP-A-9-87188. Furthermore, JP-A-10-36279 discloses that a hibiscus extract has a fibroblast-proliferating action, and that various effects can be imparted to a compounded cosmetic by combining it with various physiologically active components and oils. It shows that you can do it.

[0003]

Various types of plant extracts having high efficacy are known in addition to hibiscus extracts. Shea butter is a component having a high ultraviolet absorption effect.
There were only limited ones such as coffee extract. If the plant extract itself has an ultraviolet protection effect, an effective ultraviolet protection cosmetic can be obtained from the consumer's image of the nature and the effective effect. That is, an object of the present invention is to provide an ultraviolet protection cosmetic having an excellent ultraviolet protection effect.

[0004]

Means for Solving the Problems The inventors of the present invention examined the ultraviolet protection effect of various extracts, and found that hibiscus extract, a kind of flower that blooms to the south, has a strong ultraviolet absorbing ability, and that It was found to be effective in suppressing the inflammatory response during irradiation.

That is, a first aspect of the present invention is an ultraviolet protective cosmetic containing a hibiscus extract.

[0006] A second invention provides a hibiscus extract,
An ultraviolet protective cosmetic comprising an average primary particle diameter in the range of 5 to 100 nm and containing at least one kind of fine metal oxide having an ultraviolet protective effect.

[0007] A third invention provides a hibiscus extract,
An ultraviolet protection cosmetic comprising an average primary particle diameter in the range of 5 to 100 nm and containing at least one kind of fine metal oxide having an ultraviolet protection effect and at least one organic ultraviolet absorber.

According to a fourth aspect of the present invention, the surface of the particulate metal oxide in the raw material is subjected to a water-repellent treatment with at least one surface treating agent selected from silicones, silanes, fluorine compounds, amino acid compounds and metal soaps. The above ultraviolet protection cosmetic composition is characterized in that:

A fifth aspect of the present invention is the above-mentioned ultraviolet protective cosmetic, characterized in that the organic ultraviolet absorbent is sealed in a polymer powder.

In a sixth aspect of the present invention, the organic ultraviolet absorbent is 2-ethylhexyl paramethoxycinnamate, 4-tert-
-The above-mentioned ultraviolet protection cosmetic is characterized in that it is at least one selected from -butyl-4'-methoxydibenzoylmethane.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hibiscus used in the present invention includes Malvaceae and Hibiscus plants.
Hibisucus rosa-sinensis L. (Bussouge), H. schizo
petalus Hook.f. (Fulin bussouge), H.sabdarif
fa L. (Roselle), H.arnottiaus A.Gray, H.kokio Hi
llebr. refers to plants commonly called hibiscus. Hibiscus is extracted from water, alcohols, polyhydric alcohols, ketones such as acetone, ester solvents such as ethyl acetate, ethers, aqueous or organic solvents such as toluene, etc. And extraction under normal pressure, increased pressure, or reduced pressure at normal temperature or under heating. In particular, in the present invention, a method of extracting a hibiscus flower or a dried flower thereof with a water-soluble solvent selected from water, alcohol and polyhydric alcohol, and a mixed solvent thereof is preferable. The extract may be further purified by a column or the like, or an antioxidant, a stabilizer, a preservative, or the like may be added to the extract. Furthermore, the extract may be heated. When flowers are extracted as hibiscus, a bright red solution is obtained.

The hibiscus extract is preferably subjected to an operation of reducing the sensitizing source by an activated carbon treatment or a column fraction extraction treatment. When these treatments are performed, the color of the extract ranges from red to yellow to colorless.
The hibiscus extract referred to in the present invention also includes a dried product obtained by removing the extraction solvent from the extract in addition to the above extract.

The hibiscus extract used in the present invention preferably has a solid content of 0.1 to 50% by weight. Also,
The content of the hibiscus extract in the ultraviolet protection cosmetic is
Although it depends on the concentration of the active ingredient, it is preferably 0.001 to 5%, more preferably 0.01 to 3% by weight, based on the total amount of the ultraviolet protection cosmetic in terms of solid content.

The fine metal oxide particles used in the present invention are those having an average primary particle diameter in the range of 5 to 100 nm and having an ultraviolet protection effect. Examples thereof include fine titanium oxide particles, fine zinc oxide particles, fine cerium oxide particles, and fine oxide particles. Iron. It is preferable to use one or more, preferably two or more of these fine particle metal oxides in combination. For example, it is preferable to combine fine particle titanium oxide and fine particle zinc oxide. The particle size distribution of the fine metal oxide does not need to be particularly sharp, and may be either sharp or broad. In addition, as the shape of the fine metal oxide, spherical, needle-like, rod-like, spindle-like, irregular shape,
The shape is not particularly limited, such as a plate shape, and the crystalline form is not particularly limited, such as amorphous, rutile, and anatase.

Further, these fine particle metal oxides may be subjected to conventionally known surface treatments such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment, -Acylated lysine treatment, polyacrylic acid treatment,
Metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, preferably surface-treated by mechanochemical treatment or the like, in particular, silicone, silane, fluorine compound, amino acid compound, one or more selected from metal soap It is preferable that a water-repellent treatment is performed with a surface treatment agent. Examples of the silicone treatment include coating and heating treatment of methyl hydrogen polysiloxane, and the silane includes an alkylsilane treatment. The fluorine compound includes a perfluoroalkyl phosphate, a perfluoropolyether, and a perfluoroalkyl. Silicone, perfluoroalkyl / polyether co-modified silicone, perfluoroalkylsilane, and the like, and amino acid-based compounds include N-lauroyl-L-lysine, and metal soaps include aluminum stearate. Can be Further, the fine particle metal oxide used in the present invention is preferably provided with a metal oxide layer selected from silica and alumina on the particle surface in order to suppress the photocatalytic activity. It is preferable that the above water-repellent surface treatment is performed after coating with alumina.

In the present invention, the content of the fine metal oxide in the ultraviolet protection cosmetic is based on the total amount of the ultraviolet protection cosmetic.
It is preferably 1 to 40% by weight, more preferably 3 to 30% by weight.
% By weight.

In the ultraviolet protection cosmetic composition of the present invention, it is effective to use an organic ultraviolet absorber in addition to the above components. Examples of the organic ultraviolet absorber include 2-ethylhexyl paramethoxycinnamate and 2-hydroxy-
4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfuric acid, 2,2'-dihydroxy-4-methoxybenzophenone, p-methoxyhydrocinnamic acid diethanolamine salt, p-aminobenzoic acid (hereinafter abbreviated as PABA) , Ethyldihydroxypropyl PABA, glyceryl PABA, homomenthyl salicylate, methyl-O-aminobenzoate, 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate, octyl dimethyl PABA, octyl methoxycinnamate, octyl salicylate, 2-phenyl -Benzimidazole-5-sulfate, triethanolamine salicylate, 3- (4-methylbenzylidene) camphor, 2,4
-Dihydroxybenzophenine, 2,2 ', 4,4'-
Tetrahydroxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2-hydroxy-4-N-octoxybenzophenone, 4-isopropyldibenzoylmethane, butylmethoxydibenzoylmethane, 4- (3,4 -Dimethoxyphenylmethylene) -2,5-dioxo-1-imidazolidine 2-ethylhexyl propionate, polymer derivatives thereof,
Silane derivatives and the like. Among these organic ultraviolet absorbers, 2-ethylhexyl paramethoxycinnamate and 4-tert-butyl-4′-methoxydibenzoylmethane are particularly preferably used. The content of the organic UV absorber in the UV protection cosmetic is preferably 1 to 20% by weight, more preferably 3 to 10% by weight, based on the total amount of the UV protection cosmetic.

It is preferable to use an organic ultraviolet absorber sealed in a polymer powder. The polymer powder may or may not be hollow, and the average primary particle size may be in the range of 0.1 to 50 μm, and the particle size distribution may be broad or sharp. Acrylic resin, methacrylic resin,
Examples include styrene resin, urethane resin, polyethylene, polypropylene, polyethylene terephthalate, silicone resin, nylon, and acrylamide resin.
In these polymer powders, 2-ethylhexyl paramethoxycinnamate and 4-tert-butyl- which are organic UV absorbers in the range of 0.1 to 30% by weight of the powder weight.
A powder incorporating 4'-methoxydibenzoylmethane or the like is preferable, and particularly, 4-tert, which is a UVA absorber, is preferred.
It is preferable to blend -butyl-4'-methoxydibenzoylmethane sealed in a polymer powder.

In addition to the above-mentioned components, the ultraviolet protective cosmetic of the present invention includes oils, powders (pigments, dyes, resins), fluorine compounds, resins, surfactants, which are usually used in cosmetics.
Components such as a thickener, a preservative, a fragrance, a humectant, a physiologically active ingredient, a salt, a solvent, an antioxidant, a chelating agent, a neutralizing agent, a pH adjuster, and an insect repellent can be blended.

Examples of powders include Red No. 104, Red 2
Dyes such as No. 01, Yellow No. 4, Blue No. 1, Black No. 401,
Lake pigments such as yellow No. 4 Al lake, yellow No. 203 Ba lake, nylon powder, silk powder, urethane powder, Teflon powder, silicone powder, polymethyl methacrylate powder, cellulose powder,
Silicone elastomer spherical powders, polymers such as polyethylene powder, colored pigments such as carbon black, ultramarine, navy blue, etc., extenders such as talc, mica, sericite, kaolin, plate-like barium sulfate, pearl pigments such as mica titanium, sulfuric acid Metal salts such as barium, calcium carbonate, magnesium carbonate, aluminum silicate, and magnesium silicate, bentonite, smectite, boron nitride, and the like. The shape of these powders (spherical, rod-like, needle-like, plate-like, irregular, flake-like, spindle-like, etc.) is not particularly limited.

As described above, these powders may be subjected to conventionally known surface treatments such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment, N-
It may or may not be surface-treated in advance by acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, or the like.

Among these powders, it is preferable to use elastomers such as silicone elastomer spherical powder, polyethylene powder, polypropylene powder, Teflon powder, silicone rubber, urethane powder, etc., because the aging stability and feel of the product are improved. . In particular, it is preferable to use a combination of a silicone elastomer spherical powder and an ester oil or a combination of a silicone elastomer spherical powder and a silicone oil (including volatile and non-volatile). Examples of the silicone elastomer spherical powder include, for example, Trefill E505C, Trefill E506C, Trefill E507 manufactured by Dow Corning Toray Silicone Co., Ltd.

Examples of the oil agent include volatile and non-volatile oil agents, solvents and resins usually used in cosmetics.
A liquid, paste, or solid at room temperature may be used, but a liquid excellent in handling is preferable. Examples of oils include higher alcohols such as cetyl alcohol, isostearyl alcohol, lauryl alcohol, hexadecyl alcohol, octyl dodecanol, fatty acids such as isostearic acid, undecylenic acid, and oleic acid, glycerin, sorbitol, ethylene glycol, and propylene glycol. , Polyhydric alcohols such as polyethylene glycol, myristyl myristate, hexyl laurate, decyl oleate, isopropyl myristate, hexyldecyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, octyl oxystearate Such as esters, liquid paraffin, hydrocarbons such as petrolatum, squalane, lanolin, reduced lanolin, carnauba wax and the like C, mink oil, cacao butter, coconut oil, palm kernel oil, camellia oil, sesame oil, castor oil, oils such as olive oil, and ethylene-alpha-olefin co-oligomer and the like.

Examples of other forms of oils include dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, and fluoroalkyl.
Polyoxyalkylene co-modified organopolysiloxane,
Alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amodimethicone, amino-modified organopolysiloxane, silicone gel, acrylic silicone, trimethylsiloxysilicic acid, silicone compound such as silicone RTV rubber, perfluoropolyether, Fluorine compounds such as pitch fluoride, fluorocarbon, and fluoroalcohol are exemplified.

Examples of the solvent include purified water, cyclic silicone, ethanol, light liquid isoparaffin, lower alcohol, ethers, LPG, fluorocarbon, N-methylpyrrolidone, fluoroalcohol, volatile linear silicone, next-generation fluorocarbon, etc. Is mentioned.

As the surfactant, for example, an anionic surfactant, a cationic surfactant, a nonionic surfactant, and a betaine surfactant can be used.

The physiologically active ingredients include vitamins, whitening agents, blood circulation promoters, suntans, ceramides, various plant extracts other than hibiscus extracts, tightening components, crude drugs,
And herbal medicines. In particular, JP-A-10-36279
The combination with various physiologically active ingredients as described in the above item is preferable.

Examples of the ultraviolet protection cosmetics of the present invention include sunscreens, makeup bases, emulsions, lotions,
Cream, serum, concealer, foundation,
Lipstick, eyeshadow, teak, nail color, filter color.

[0029]

The present invention will be described in detail below with reference to examples and comparative examples. The method for measuring the ultraviolet absorbing ability of the hibiscus extract, the method for evaluating various properties of the cosmetics used in Examples and Comparative Examples, and the like are described below.

(1) Measurement of UV Absorbing Ability of Hibiscus Extract Extract of Hibiscus flower extracted with a mixture of ethanol and water (50% by weight) (concentration of 3.2% by weight in terms of solid content)
FIG. 1 shows the results of measuring the absorbance of each sample with a spectrophotometer. As is clear from FIG. 1, the hibiscus extract has an ultraviolet absorbing ability.

(2) UV protection / anti-inflammatory effect The cosmetics of the Examples and Comparative Examples were prepared using SP of the Japan Cosmetic Industry Association.
The measurement was performed according to the F measurement method standard. In other words, artificial sunshine was applied to the unpainted skin and the painted skin for a certain period of time, and it was checked whether or not "sunburn inflammation" had occurred on the next day, and the minimum amount of ultraviolet light required for tanning of the painted skin was determined. The value obtained by dividing by the minimum amount of ultraviolet light required for
The PF value was used. SPF measurement was performed at n = 10. Evaluation was performed according to the criteria shown in Table 1 from the relationship between the SPF values of the example and the comparative example.

[0032]

[Table 1]

(3) Safety The product was applied to the arms of 10 panelists, and they were allowed to work in an environment exposed to ultraviolet rays for a total of 2 days. Two weeks later, the product was applied to the arm again, and it was observed the next day whether or not symptoms such as rash and erythema occurred. If an abnormality occurred during the test, the test was stopped at that stage.

Example 1 Using a 1,3-butylene glycol solution of hibiscus flower (sensitizing source-removed type, solid content conversion: 4.5% by weight), 3% by weight of methylhydrogenpolysiloxane as fine metal oxide Using silica-treated fine particle zinc oxide (average primary particle diameter 30 nm) coated and heat-treated with and silica-alumina-treated fine particle titanium oxide (average primary particle diameter 17 nm) treated in the same manner, and UV-absorbing resin powder 4- Using a methacrylic resin powder containing tert-butyl-4′-methoxydibenzoylmethane at 10% by weight of the powder weight, a sunscreen agent was obtained according to the formulation in Table 2. The unit of the compounding amount is% by weight.

[0035]

[Table 2]

The components A and B were separately mixed at 80 ° C. While stirring, the component B was mixed with the component A, allowed to cool, and then filled in a light-shielding container to obtain a product.

Comparative Example 1 A sunscreen was prepared in the same manner as in Example 1 except that 1,3-butylene glycol was used instead of the hibiscus extract (1,3-butylene glycol base) of Example 1. did.

Table 3 shows the results of the evaluation on the ultraviolet protection effect, and Table 4 shows the results of the evaluation on the safety.

[0039]

[Table 3]

[0040]

[Table 4]

From the results shown in Table 3, it was possible to obtain a higher SPF value in the example than in the comparative example. This is considered to be due to the function of the hibiscus extract in absorbing the ultraviolet light and the effect of suppressing erythema upon irradiation with ultraviolet light (anti-inflammatory effect). Further, from the results in Table 4, it can be seen that both the examples and the comparative examples are excellent in safety at the time of ultraviolet irradiation, and there is no problem in safety in practical use. In addition, as a result of a practical test, it was found that when this product was used, effects on use such as a feeling of smooth skin after dropping the product were observed.

[0042]

From the above, it is apparent that the present invention can provide an ultraviolet protective cosmetic excellent in ultraviolet protective effect and anti-inflammatory effect by blending the hibiscus extract.

[Brief description of the drawings]

FIG. 1 is a diagram showing the absorbance of a hibiscus extract.

Claims (6)

[Claims] 1. An ultraviolet protective cosmetic comprising a hibiscus extract. 2. An ultraviolet protective cosmetic comprising a hibiscus extract and one or more fine metal oxide particles having an average primary particle diameter in the range of 5 to 100 nm and having an ultraviolet protective effect. 3. A method comprising: containing a hibiscus extract, at least one fine metal oxide having an average primary particle diameter in the range of 5 to 100 nm and having an ultraviolet protection effect, and at least one organic ultraviolet absorber. Characteristic UV protection cosmetics. 4. The method according to claim 1, wherein the surface of the fine particle metal oxide is silicone,
The ultraviolet protective cosmetic according to claim 2 or 3, wherein the cosmetic is water-repellent by one or more surface treating agents selected from silanes, fluorine compounds, amino acid compounds, and metal soaps. 5. The ultraviolet protective cosmetic according to claim 3, wherein the organic ultraviolet absorbent is encapsulated in a polymer powder. 6. The organic ultraviolet absorber is 2-ethylhexyl paramethoxycinnamate, 4-tert-butyl-4 ′.
The ultraviolet protection cosmetic according to claim 3 or 5, wherein the cosmetic is at least one selected from -methoxydibenzoylmethane.