JPH07165527A - Ultraviolet-absorbing skin cosmetic - Google Patents

Abstract

PURPOSE:To obtain a skin cosmetic having high safety and light stability and exhibiting excellent ultraviolet absorbing effect. CONSTITUTION:This skin cosmetic contains an extract of a plant of the family Leguminosae Juss. Particular embodiments of the invention are a skin cosmetic wherein the plant of the family Leguminosae Juss. is a plant of the genus Cassia Linn., and a skin cosmetic wherein the extract is extracted from the bark of the plant of the genus Cassia Linn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic, and more particularly to a highly safe UV absorbent skin cosmetic containing a plant extract having a UV absorbing effect.

[0002]

2. Description of the Related Art Ultraviolet rays contained in sunlight are dermatologically long wavelength ultraviolet rays (UV-) of 400 nm to 320 nm.
A), 320 nm to 290 nm medium wavelength ultraviolet light (UV-
B) Classified as short wavelength ultraviolet rays (UV-C) of 290 nm or less. Of these, ultraviolet rays having a wavelength of 290 nm or less are absorbed by the ozone layer and do not reach the surface of the earth.

Ultraviolet rays reaching the surface of the earth have various effects on human skin. Of the ultraviolet rays that reach the ground, UV-
B forms erythema and blisters on the skin and promotes melanin formation. On the other hand, UV-A causes browning of the skin, lowers the elasticity of the skin and promotes the generation of wrinkles, resulting in rapid aging. It can also accelerate the onset of the erythema reaction, or enhance this reaction for some patients, and even cause phototoxicity or even a photoallergic reaction. Various ultraviolet absorbers have been developed to protect the skin from such harmful effects of ultraviolet rays.

As a wide variety of UV absorbers obtained by chemical synthesis, for example, dibenzoylmethane derivatives, benzophenone derivatives, urocanic acid, p-aminobenzoic acid, 2
-Ethylhexyl p-dimethylaminobenzoate and the like are mentioned, and these are actually blended in cosmetics and used for prevention of damage due to ultraviolet rays.

[0005]

However, conventional sunscreen cosmetics containing an ultraviolet absorber produced by chemical synthesis have a safety problem in terms of photosensitization and the cosmetics are limited in their amount. It is the most problematic drug among raw materials. On the other hand, those derived from natural products generally have a mild action and are highly safe, and it is possible to mix them in a large amount, but many ultraviolet absorbers absorb short-wavelength ultraviolet rays having an absorption wavelength of 270 nm or less. However, there are few substances that absorb the problematic ultraviolet rays having wavelengths in the UV-A and / or UV-B regions, and those that exhibit a satisfactory effect have not yet been obtained.

The present invention has been made in view of the above problems of the prior art, and its object is a highly safe substance obtained from a natural product, and UV-A and / or UV-B.
An object is to provide an ultraviolet absorber having absorption in a region and a skin cosmetic containing the same.

[0007]

The present inventors have SUMMARY OF THE INVENTION As a result of intensive studies for achieving the above object, legumes (Legum
inosae Juss.) has an excellent ability to absorb ultraviolet rays, and it has been found that a safe sun care product can be obtained by incorporating this extract, and the present invention has been completed. One feature of the skin cosmetic of the present invention is that it contains an extract of a leguminous plant ( Leguminosae Juss.). One feature of the skin cosmetic of the present invention is that an extract of a leguminous plant ( Leguminosae Juss.) Is an extract of a plant belonging to the genus Kawasetsu ( Cassia Linn.).

One of the skin cosmetics of the present invention is Cassia timorensis DC., Which is an extract of leguminous plants ( Leguminosae Juss.), Which belongs to the genus Plant of Cassia Linn. Cassia alata
Linn.), Senna ( Cassia angustifolia Vahl), Cobano Senna ( Cassia coluteoides Collad), Hana Senna ( Cass )
ia corymbosa Lam.), Cassia didymobotr
ya Fresen.), Nanbang Saikachi ( Cassia fistura Lin
n.), Java Senna ( Cassia javjanica Linn.), Ebisugusa ( Cassia obutusifolia Linn.), Habuso ( Cassia o )
ccidentalis Linn.), Tagaya Sanuki ( Cassia siamea L
am.), Obana nosenna ( Cassia sophera Linn.), and Moxenna ( Cassia surattensis Burm. f .) extracts.

[0009] skin cosmetic of the present invention, legumes in part (Leguminosae Juss.) Of the extract Kawaraketsumei genus (Ca
ssia Linn.) bark extract.

The structure of the present invention will be described in detail below. Examples of legumes used in the present invention include Cassia timorensis DC. And Cassena alata ( Cassia alata ), which belong to the genus Kawasaki Tsutsumei ( Cassia Linn.).
Linn.), Senna ( Cassia angustifolia Vahl), Cobano Senna ( Cassia coluteoides Collad), Hana Senna ( Cass )
ia corymbosa Lam.), Cassia didymobotr
ya Fresen.), Nanbang Saikachi ( Cassia fistura Lin
n.), Jawasen'na (Cassia javanica Linn.), sicklepod (Cassia obutusifolia Linn.), Senna occidentalis (Cassia occ
identalis Linn.), Tagaya Sanki ( Cassia siamea La
m.), Obano senna ( Cassia sophera Linn.), Mox senna ( Cassia surattensis Burm.f.), etc.,
In particular, Cassia timorensis D
C.) is preferred.

The extract according to the present invention is extracted using the above-mentioned plant flowers, bark, fruits, leaves, roots, seeds, stems or the like or whole plants, and in particular, Cassia timolensis.
timorensis DC.) is used mainly in the bark.
As the method for extracting the plant extract used in the present invention, the plant is used as a solvent, for example, lower alcohols such as methanol, ethanol, propyl alcohol, isopropyl alcohol, butanol, isobutanol or lower water alcohols, propylene glycol, 1,3-. It can be obtained by extracting with a polyhydric alcohol such as butylene glycol or a water-containing polyhydric alcohol, various organic solvents such as acetone and ethyl acetate, and distilling off the solvent. In particular, methanol or ethanol is preferable in terms of the extraction efficiency and the yield because it has good infiltration property with respect to plants used in the present invention.

Further, the extract according to the present invention is purified by using activated carbon, column chromatography or the like in order to remove the color and odor and to make it easier to use, to the extent that the effect of the present invention is not impaired. May be. Such a purified product can also be used in the external preparation for skin of the present invention. The compounding amount of the leguminous plant extract in the total amount of the ultraviolet absorbent skin cosmetic of the present invention is preferably 0.005 to 30% by weight as a dried product. If the blending amount is less than 0.005% by weight, the ultraviolet ray absorbing effect is not sufficiently exerted, and if it is blended in an amount of 30% by weight or more, the cost becomes high, which is not realistic.

The skin cosmetic of the present invention contains at least one extract derived from legumes. The ultraviolet-absorbing skin cosmetic of the present invention is, in addition to the above-mentioned essential components, within a range that does not impair the effects of the present invention, if necessary,
Various components generally used in cosmetics, quasi drugs, pharmaceuticals, etc., an aqueous component, a moisturizer, a thickener, an antiseptic, an antioxidant, a fragrance, a coloring agent, a drug and the like can be added. Hydrocarbons such as solid or liquid paraffin, crystal oil, ceresin, ozokerite, montan wax, etc.,
Vegetable or animal oils and waxes such as silicone oils, olive oil, ground wax, carnauba wax and lanolin, and stearic acid, palmitic acid, oleic acid, glycerin monostearate ester, glycerin monooleate ester, propyl isopropyl myristate propyl ester , Fatty acids or esters thereof such as isopropyl stearate, esters of monohydric alcohols or polyhydric alcohols of branched fatty acids, alcohols such as ethyl alcohol, isopropyl alcohol, cetyl alcohol, palmityl alcohol, glycols, glycerin, sorbitol Examples thereof include surfactants such as polyhydric alcohols or esters thereof, nonionic surfactants, anionic surfactants, and cationic surfactants.

In addition, the following plant extracts and medicines can be appropriately incorporated in the present invention. For example, capsicum, youtei, aloe, wolfberry, mugwort, mustard, rice, mankeishi, mannen wax, kossai ho, nishida, gentian,
Tanjin, loofah, kyoto, pine, kujin, safflower, barberry, areca, eucalyptus, Kagosou, mokuro, goshitsu, psycho, cha, shinui, wasabi, joteishi, netherlands senchi, gardenia, usabasaicin, garlic, mint, Yokuinin, giraffe, palm, burdock, licorice, hop, chrysanthemum, rakkyo, leek, leek, onion, senega, armchadul, mannoke mushroom, dio, monoammonium glycyrrhetinic acid, glycyrrhetinic acid, glycyrrhizinate, sesame, senkyu, kashi and the like.

The dosage form of the ultraviolet absorbent skin cosmetic of the present invention is arbitrary, and for example, liquid, emulsion, cream, stick, and other dosage forms can be used.

[0016]

The preferred embodiments of the present invention will be described below.
The present invention is not limited to these. Also,
Unless otherwise specified, the compounding amount is shown in% by weight. Extraction Example 1 First, Cassia timorensis D
The method for extracting the effective extraction fraction from the bark of C.) will be described. Raw material Cassia timorensis DC. 100g crushed bark extract 100ml of crushed Cassia timorensis bark added with 500 ml of methanol, temperature 30 ° C, time 3 hours,
The extraction operation was performed at a rotational stirring number of 100 rpm. Pressure filtration The extract obtained as described above was filtered under a pressure of nitrogen of 0.1 kg / cm ² or less, with filter paper No. Filtered by 2. Concentration The filtrate obtained above was concentrated under reduced pressure at a temperature of 25 to 30 ° C. and a degree of reduced pressure of 60 to 65 torr. As a result, 1.13 g of a methanol extract was obtained.

Test Example 1 Measurement of Ultraviolet Absorption Spectrum The extract of Extraction Example 1 was dissolved in ethanol to a concentration of 10 ppm and the ultraviolet absorption spectrum was measured.
In addition, as an ultraviolet absorber derived from the same natural product, licorice (Gl
An extract extracted from the whole plant of ycyrrhizae Radix) in the same manner as in the above-mentioned Extraction Example 1 was used as Comparative Example 1, and the ultraviolet absorption spectrum was similarly measured.

The results are shown in FIGS. 1 and 2. Extraction example 1
Has a maximum absorption in the UV-A region of about 325 nm and is about 2
Although it showed an excellent ultraviolet absorbing ability in the UV-A to UV-B region of 70 to 350 nm, it was about 280 nm in Comparative Example 1.
Has maximum absorption in the UV-C region of UV-A to UV-B
The ultraviolet absorption capacity in the region was low. As is clear from the above, the extract of the present invention is UV-A and UV-A.
It had an excellent ultraviolet absorbing ability in the B region.

Test Example 2 Light Stability Next, the present inventors examined the light stability of the plant extract according to the present invention. That is, the extracts of Extraction Example 1 and Comparative Example 1 were dissolved in ethanol so as to have a concentration of 30 ppm and filled in a glass sample bottle, and a xenon lamp light irradiation was performed for 30 hours (corresponding to about 10 days in summer). It was The ultraviolet absorption spectra were measured before and after irradiation with a xenon lamp, and the ultraviolet absorption capacities were compared. As a result, the chart of the ultraviolet absorption spectrum after the irradiation with the xenon lamp in Extraction Example 1 showed almost no change from that before the irradiation, but in Comparative Example 1, the absorbance was greatly reduced in the wavelength region of 270 nm or more. From the above results, it is understood that the extract according to the present invention has excellent photostability.

The following is a formulation example of a skin cosmetic containing the legume extract according to the present invention. Formulation Example 1 Cream A. Oil phase Stearic acid 10.0% Stearyl alcohol 4.0 Glycerin monostearate 8.0 Vitamin E acetate 0.5 Perfume 0.4 Ethylparaben 0.1 Butylparaben 0.1 Propylparaben 0.1 B. Aqueous phase Cassia Timorensis bark extract (Extraction example 1) 0.03 1,3-butylene glycol 10.0 Propylene glycol 8.0 Glycerin 2.0 Potassium hydroxide 0.4 Purified water Residue

<Manufacturing Method> A water phase B is manufactured by further dissolving each component using a solution of Cassia thymolensis bark extract previously dissolved in 1,3-butylene glycol. Then, the oil phase A and the water phase B are heated to 70 ° C. to completely dissolve them. Phase A is added to phase B and emulsified with an emulsifier. The emulsion was cooled using a heat exchanger to obtain a cream. Also,
The cream according to this formulation example was diluted with 75% ethanol so that the Cassia thymolensis extract concentration became a 0.003% concentration solution, placed in a quartz cell, and the absorbance at a wavelength of 200 to 700 nm was measured by a spectrophotometer. As a result, the UV absorption spectrum of Extraction Example 1 was 270
It has been suggested that it has a high absorption ability in the wavelength region around 350 nm and is effective in preventing sunburn.

All of the following skin cosmetics were highly safe and had an ultraviolet absorbing effect as in Formulation Example 1. Formulation 2 Cream A. Cetanol 4.0% Vaseline 7.0 Isopropyl myristate 8.0 Squalane 12.0 Dimethylpolysiloxane 3.0 Glycerin monostearyl ester 2.2 POE (20) sorbitan monostearate 2.8 Glycyrrhetinic acid stearate 0.0. 02 Ethylparaben 0.1 Butylparaben 0.1 B.I. Water phase Hana Senna bark extract 0.1 1,3-butylene glycol 7.0 Phenoxyethanol 0.2 L-Ascorbic acid phosphate magnesium salt 3.0 Ascorbic acid phosphate magnesium salt 1.0 Purified water Residue

<Production method> 1,3-
After preliminarily dissolving in butylene glycol, a cream was obtained according to Formulation Example 1.

Formulation Example 3 Emulsion A. Oil phase Squalane 5.0% Oleyl oleate 3.0 Vaseline 2.0 Sorbitan sesquioleate 0.8 Polyoxyethylene (20) oleyl ether 1.2 2-Ethylhexyl-p-methoxycinnamate 3.0 Perfume 0.1. 12 B. Water phase Senna bark extract 0.2 Dipropylene glycol 5.0 Ethanol 3.0 Carboxyl vinyl polymer 0.17 Sodium hyaluronate 0.1 Potassium hydroxide 0.08 Methylparaben 0.15 Sodium hexamethanephosphate 0.05 Purification Water residue

<Manufacturing Method> The senna bark extract was previously dissolved in dipropylene glycol, and then an emulsion was obtained according to the formulation example 1.

Formulation Example 4 Cream A. Oil phase Behenyl alcohol 0.5% 12-human oxystearic acid cholestanol ester 2.0 Squalane 7.0 Jojoba oil 5.0 Self-emulsifying glyceryl monostearate 2.5 Polyoxyethylene (20) sorbitan monostearate 1. 5 2-Hydroxy-4-methoxybenzophenone 3.0 Ethylparaben 0.2 Butylparaben 0.1 Perfume 0.1 B.I. Aqueous phase 1,3-butylene glycol 6.0 Covanocenna bark extract 0.05 Glycerin 3.5 Zinc oxide 1.5 Kaolin 0.5 Bentonite 0.3 Sodium hexametaphosphate 0.03 Purified water Residue

<Manufacturing Method> 1,3 of Kovanocenna bark extract
-After being dissolved in butylene glycol, a powdered cream was obtained by a production method according to Formulation Example 1.

Formulation Example 5 Essence A. Oil phase Stearic acid 3.0% Cetanol 1.0 Lanolin derivative 3.0 Liquid paraffin 5.0 2-Ethylhexyl stearate 3.0 POE Cetyl alcohol ether 2.0 Glycerin monostearate 2.0 Preservative Suitable amount Perfume Suitable Amount B. Water phase 1,3-butylene glycol 6.0 Triethanolamine 10.0 Coconut senna stem extract 10.0 Purified water Residue

<Manufacturing Method> A coconut senna stem extract is dissolved in 1,3-butylene glycol, and this is dissolved in purified water together with triethanolamine to prepare an aqueous phase B. Stearic acid, cetanol, lanolin derivative, liquid paraffin, 2-ethylhexyl stearate, and glycerol monostearate are heated and dissolved at 70 to 80 ° C., and then POE cetyl alcohol ether, preservative, and perfume are sequentially dissolved,
The temperature is brought to 70 ° C. and oil phase A is produced. The oil phase A is added to the above-mentioned water phase B with stirring to emulsify. After uniformly preparing the emulsified particles with a homomixer, deaeration and cooling were performed to obtain an essence.

Formulation 6 Essence A. Ethanol phase Sorbitan monooleate 1.0% Oleyl alcohol 0.5 Vitamin E acetate 0.2 Perfume proper amount Ethanol 10.0 POE sorbitan dilaurate monostearate ester 1.0 Preservative proper amount anti-fading agent proper amount B. Water phase Nanbansai Kachi Bark Extract 0.05 Dipropylene glycol 5.0 Polyethylene glycol 400 5.0 Carboxyvinyl polymer 0.3 Sodium alginate 0.3 Sodium hydroxide 0.15 POE sorbitan dilaurate monostearate 1.0 Placenta Extract 0.2 Purified water balance

<Manufacturing Method> After dissolving the carboxyvinyl polymer in purified water, dipropylene glycol, polyethylene glycol 400 and Nanbansai Kachi are sequentially dissolved,
An aqueous phase B is obtained. POE sorbitan dilaurate monostearate ester, sorbitan monooleate ester, oleyl alcohol, vitamin E acetate, perfume, preservative and anti-fading agent are sequentially dissolved in ethanol to obtain ethanol phase A, and ethanol phase A is converted to aqueous phase B. And emulsify. Sodium hydroxide is dissolved in a part of purified water, which is added, stirred, degassed, and filtered.

Formulation Example 7 Oil-in-water foundation A. Powder talc 3.0% Titanium dioxide 5.0 Red iron oxide 0.5 Yellow iron oxide 1.4 Black iron oxide 0.1 B. Water phase Bentonite 0.5 Polyoxyethylene sorbitan monostearate 0.9 Triethanolamine 1.0 Propylene glycol 10.0 Java senna bark extract 0.1 Purified water 56.4 C.I. Oil phase Stearic acid 2.2 Isohexadecyl alcohol 7.0 Glycerin monostearate 2.0 Liquid lanolin 2.0 Liquid paraffin 8.0 Preservative proper amount Perfume proper amount

<Manufacturing Method> The Java senna bark extract is partially dissolved in propylene glycol in advance and dispersed in propylene glycol, which is the bentonite remaining as a thickener in the aqueous phase. These are added to purified water and subjected to a homomixer treatment at 70 ° C., then the remaining water phase components are added and sufficiently stirred. Add the powder portion that has been thoroughly mixed and pulverized to this while stirring,
Perform homomixer treatment at 0 ° C. Next, the oil phase heated and dissolved at 70 ° C. to 80 ° C. is gradually added and subjected to a homomixer treatment at 70 ° C. This is cooled with stirring, the fragrance is added at 45 ° C., and it is cooled to room temperature. Finally, degas and fill the container.

Formulation Example 8 W / O emulsion type foundation (cream type) A. Powder sericite 5.36% Kaolin 4.0 Titanium dioxide 9.32 Red iron oxide 0.36 Yellow iron oxide 0.8 Black iron oxide 0.16 B. Oil phase Liquid paraffin 5.0 Decamethylcyclopentasiloxane 12.0 Polyoxyethylene-modified dimethylpolysiloxane 4.0 Purified water 51.9 C.I. Aqueous phase dispersant 0.1 1,3-butylene glycol 5.0 Ebisugusha whole grass extract 0.08 Purified water 51.9 Preservative A suitable amount D.I. Other stabilizers 2.0 Fragrance suitable amount

<Production Method> The whole bark extract of Ebisugusha is dissolved in 1,3-butylene glycol in advance, and the aqueous phase is added to 70%.
After heating and stirring at ℃, add the powder part that was thoroughly mixed and pulverized.
Perform homomixer treatment at 0 ° C. A stabilizer dissolved in a part of purified water is added to this and stirred. Further, the oil phase heated to 70 ° C. is added, and the mixture is homomixed at 70 ° C. This is cooled with stirring, a fragrance is added at 45 ° C., and cooled to room temperature. Finally, degas and fill the container.

Formulation Example 9 W / O cream type sunscreen cosmetic A. Aqueous phase Purified water 54.95% 1,3-butylene glycol 7.0 Titanium dioxide 5.0 Disodium edetate 0.05 Ethanol 2.0 Whole hazelnut extract 0.5 B. Oil phase Oxybenzone 2.0 Octyl paramethoxycinnamate 5.0 Squalane 10.0 Vaseline 5.0 Stearyl alcohol 3.0 Stearic acid 3.0 Glyceryl monostearate 3.0 Polyethyl acrylate 1.0 Antioxidant Appropriate amount Preservative Appropriate amount Perfume Appropriate amount

<Manufacturing Method> The whole extract of Habusoum is dissolved in ethanol in advance, and the oil phase and the water phase are heated to 70 ° C. to dissolve them. In the water phase part, titanium dioxide is sufficiently dispersed, the oil phase part is added, and the mixture is emulsified using a homogenizer. The emulsion is cooled using a heat exchanger.

Formulation Example 10 O / W emulsion type sunscreen cosmetic A. Aqueous phase Purified water 68.3 Dipropylene glycol 6.0 Ethanol 3.0 Hydroxyethyl cellulose 0.3 Tagaya Sanuki bark extract 0.005 B.I. Oil phase Octyl paramethoxycinnamate 6.0 Glyceryloctyl diparamethoxycinnamate 2.0 4-tert-Butyl 4′-methoxybenzoylmethane 2.0 Oxybenzone 3.0 Oleyloleate 5.0 Dimethylpolysiloxane 3. 0 Vaseline 0.5 Cetyl alcohol 1.0 Sorbitan sesquioleate ester 0.8 POE (29) oleyl alcohol ether 1.2 Antioxidant proper amount Preservative proper amount Perfume proper amount

<Manufacturing Method> An extract of bark of Agave japonicus is dissolved in ethanol in advance, and the solution is combined with other aqueous phase components to 70%.
Heat to ° C to prepare the aqueous phase. And the oil phase part is 70 ° C
Heat to dissolve. Add the oil phase to the water phase and emulsify using a homogenizer. The emulsion is cooled using a heat exchanger.

Formulation Example 11 W / O type cream type sunscreen cosmetic A. Aqueous phase Purified water 36.5% 1,3-butylene glycol 6.0 Obana senna whole plant extract 1.0 B.I. Oil phase Octyl paramethoxycinnamate 5.0 Oxybenzone 3.0 4-tert-butyl 4'-methokidibenzoylmethane 1.0 Hydrophobized titanium dioxide 3.0 Squalane 40.0 Glycerin diisostearate 3.0 Organically modified Montmorillonite 1.5 Preservative Suitable amount Perfume Suitable amount

<Manufacturing Method> The whole plant extract of Obana senna was dissolved in ethanol in advance, and the oil phase part and the water phase part were each added to 7 parts.
Dissolve by heating at 0 ° C. In the oil phase part, titanium dioxide is sufficiently dispersed, and the water phase part is added while performing a homogenizer treatment. The emulsion is cooled using a heat exchanger.

Formulation Example 12 Lotion Purified water 40.0% Dipropylene glycol 5.0 1,3-butylene glycol 10.0 Polyethylene glycol 400 10.0 Ethyl alcohol 20.0 Polyoxyethylene (60) hydrogenated castor oil 3. 0 Octyl paramethoxycinnamate 1.0 Moxenna bark extract 5.0 Triethanolamine 5.0 Perfume Suitable amount

<Production Method> Polyoxyethylene (60) hydrogenated castor oil, octyl paramethoxycinnamate and a fragrance are dissolved in ethyl alcohol (alcohol phase). On the other hand, the moxenna bark extract is dissolved in ethanol in advance, and other polyhydric alcohol is added to purified water to sufficiently dissolve it (aqueous phase). Add the alcohol phase to the aqueous phase and stir well.

Formulation Example 13 O / W emulsion type sunscreen cosmetic A. Oil phase Liquid paraffin 3.0% Isopropyl myristate 2.0 Oleyl oleate 4.0 Vaseline 2.0 Stearyl alcohol 1.0 Stearic acid 2.0 Glyceryl monostearate 2.0 Vitamin E acetate Suitable amount Preservative Suitable amount Perfume proper amount B. Aqueous phase Purified water 77.8 1,3-Butylene glycol 6.0 Carboxyvinyl polymer 0.2 Triethanolamine 3.0 Cassia Timorensis bark extract (Extraction example 1) 0.1

<Manufacturing Method> The Cassia thymolensis bark extract is dissolved in 1,3-butylene glycol in advance, and the oil phase portion and the water phase portion are respectively dissolved by heating at 70 ° C. The oil phase is added to the aqueous phase, and the mixture is emulsified using a homogenizer. The emulsion is cooled using a heat exchanger.

[0046]

EFFECT OF THE INVENTION As described above, the skin cosmetic composition according to the present invention has high safety and photostability by incorporating an extract of leguminous plant ( Leguminosae Juss.), And has an excellent ultraviolet absorbing effect. It is a skin cosmetic having.

[Brief description of drawings]

FIG. 1 is an ultraviolet absorption spectrum diagram of a methanol extract of Cassia timorensis DC. Bark (Extraction Example 1) according to an example of the present invention.

FIG. 2 is a comparative example of the present invention, licorice (Glycyrrhizae Rad)
ix) It is an ultraviolet absorption spectrum diagram of the methanol extract of the whole plant (Comparative Example 1).

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kenzo Ito 1050 Shinba-cho, Kohoku-ku, Yokohama City, Kanagawa Prefecture Shiseido Daiichi Research Center (72) Inventor Tetsuji Nakamura 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Address Incorporated Shiseido Daiichi Research Center (72) Inventor Toyoyuki Nishi 14 14 Nishinoshomonguchicho, Kichijoin, Minami-ku, Kyoto-shi, Kyoto Prefecture Nippon Shinyaku Co., Ltd. (72) Inventor Akira Sano Minami, Kyoto-shi, Kyoto Prefecture 14 Shinnoshomonguchi-cho, Kichijoin-ku, Nippon Shinyaku Co., Ltd. (72) Nobutoshi Kojima 14 Shinnoshomonguchi-cho, Kichijoin, Minami-ku, Kyoto Prefecture

Claims (4)

[Claims] 1. A skin cosmetic comprising an extract of a leguminous plant ( Leguminosae Juss.). 2. The skin cosmetic according to claim 1, wherein the extract of the leguminous plant ( Leguminosae Juss.) Is an extract of the plant of the genus Cassia Linn. 3. The skin cosmetic according to claim 1 or 2, wherein the extract of leguminous plant ( Leguminosae Juss.) Is Cassia timorensis DC., Which belongs to the genus Plant of Cassia Linn. Hanasenna ( Ca
ssia alata Linn.), Senna ( Cassia angustifolia Vah
l), Cobano senna ( Cassia coluteoides Collad), Hana senna ( Cassia corymbosa Lam.), Cocos senna ( Cassia d
idymobotrya Fresen.), Nanbang Saikachi ( Cassia fist
ura Linn.), Java Senna ( Cassia javanica Linn.),
Ebisugusa ( Cassia obutusifolia Linn.), Habuso ( Ca
ssia occidentalis Linn.), Tagaya Sanki ( Cassia si
amea Lam.), Obano Senna ( Cassia sophera Linn.),
A skin cosmetic, which is an extract of at least one selected from the extracts of Moxenna ( Cassia surattensis Burm.f.). 4. The skin cosmetic according to any one of claims 1 to 3, wherein the extract of leguminous plant ( Leguminosae Juss.) Is an extract extracted from the bark of the genus Cassia Linn. Skin cosmetics.