JPH0672849A - Skin color-lightening cosmetic - Google Patents

Abstract

PURPOSE:To provide skin color-lightening cosmetics having extremely excellent effects of lightening skin color as well as preventing and curing blots and freckles caused by sun burning. CONSTITUTION:The objective skin color-lightening cosmetics contain (A) at least one member selected from the groups consisting of L-ascorbic acid and water-soluble derivatives thereof and (B) a tea extract.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a whitening cosmetic composition, and more particularly to a whitening cosmetic composition having an excellent skin whitening effect and capable of preventing and treating spots and freckles caused by sunburn.

[0002]

2. Description of the Related Art Skin spots and freckles are generally caused by activation of melanocytes due to stimulation due to exposure to ultraviolet rays from sunlight, hormonal abnormalities, genetic factors, etc., and the melanin pigment synthesized there is present in the skin. It is thought to occur due to abnormal deposition.

Conventionally, in order to prevent such skin spots and freckles, L-ascorbic acid and its derivatives,
Hydroquinone, arbutin, kojic acid, cysteine,
BACKGROUND ART Whitening cosmetics containing a melanin inhibitor such as glutathione and a placenta extract that exerts a whitening effect by acting on keratinocytes are used. However, these substances have problems in terms of stability, safety, odor, etc., and also have a weak whitening effect, and a sufficiently satisfactory whitening cosmetic has not been obtained yet.

[0004]

Therefore, there has been a demand for the development of a whitening cosmetic which has an excellent whitening effect on the skin, can treat spots and freckles, and can prevent the occurrence thereof.

[0005]

In view of the above circumstances, the inventors of the present invention have conducted extensive studies and as a result, one or more selected from the group consisting of L-ascorbic acid and water-soluble derivatives of L-ascorbic acid. The inventors have found that the combined use of a tea extract with a tea extract synergistically enhances the whitening effect and can solve the above problems, and thus completed the present invention.

Therefore, the present invention provides one or more of the following components (A) and (B) (A) L-ascorbic acid and a water-soluble derivative of L-ascorbic acid (B) tea extract A whitening cosmetic containing the product.

In the component (A) used in the present invention, the water-soluble derivative of L-ascorbic acid is not particularly limited as long as it is water-soluble. For example, monovalent metal salt of L-ascorbic acid phosphoric acid ester. L-ascorbic acid phosphoric acid sodium salt, L-ascorbic acid phosphoric acid potassium salt, divalent metal salt L-ascorbic acid phosphoric acid magnesium salt, L-ascorbic acid phosphoric acid calcium salt, trivalent L which is a metal salt
-Aluminum ascorbyl phosphate aluminum salt, and L which is a monovalent metal salt of L-ascorbyl sulfate.
-Ascorbic acid sulfate sodium salt, L-ascorbic acid sulfate potassium salt, divalent metal salt L-ascorbic acid sulfate magnesium salt, L-
Ascorbic acid sulfate calcium salt, trivalent metal salt L-ascorbic acid sulfate aluminum salt, and L-ascorbic acid monovalent metal salt L-
Ascorbic acid sodium salt, L-ascorbic acid potassium salt, divalent metal salt L-ascorbic acid magnesium salt, L-ascorbic acid calcium salt, trivalent metal salt L-ascorbic acid aluminum salt and the like are preferable. Can be mentioned.

In the present invention, the component (A) may be used either alone or in combination of two or more, and may be used in an amount of 0.001 to 30% by weight, especially 0.1% by weight based on the total amount of the cosmetic.
It is preferably blended at 1 to 5% by weight.

The tea extract of the component (B) used in the present invention is tea [Thea sinensis L
innaeus (Theaceae)] is extracted with water or a hydrophilic organic solvent such as ethanol, methanol, 1,3-butylene glycol, propylene glycol, or a mixed solvent thereof, or an extract obtained by drying the extract. One type of dry powder or a combination of two or more types can be used.

Here, as a particularly preferable extraction method of tea, for example, the following production method can be mentioned. (Production method) Tea [Thea sinensis Lin
naeus (Theaceae)] leaves are steamed with steam, which is grated, then dried and chopped. Add an aqueous ethanol solution to it and soak it at room temperature with occasional stirring.
Freeze and filter out impurities. 1,3 in this filtrate
-A solution of butylene glycol can be added and filtered to obtain a solution (extract defined in the present invention).

In the present invention, the component (B) is a solid content of 10 ^{-5 to} 0.5% by weight, especially 0.01
˜0.25 wt% is preferable.

The whitening cosmetic composition of the present invention can further improve the whitening effect on the skin and the preventive and therapeutic effects on spots and freckles due to sunburn etc. by further incorporating the kakkon root extract of the component (C). As the kakkon extract of the component (C), kakkon (PUERARIAE RADIX) is used as water, ethanol, methanol, 1,3-butylene glycol,
An extract obtained by extracting with a hydrophilic organic solvent such as propylene glycol or a mixed solvent thereof, a dry powder obtained by drying the extract, or a component of each component such as an isoflavone derivative separated from the extract Alternatively, a combination of two or more can be used.

Here, as a particularly preferable method for extracting the kudzu root, for example, the method shown in the following manufacturing method 1 or manufacturing method 2 can be mentioned. (Manufacturing method: 1) Add 5 times amount of ethanol or methanol to 1 kg of chopped dried kudzu root, and add 90
Reflux extraction is performed at 6 ° C. for 6 hours, filtration is performed, and the filtrate is concentrated under reduced pressure and dried to obtain a powder (extract specified in the present invention). The yield is 57 to 63 g when the extraction solvent is ethanol, and 90 to 1 when methanol is used.
About 10 g is obtained. (Production method: 2) 5 kg of ethanol or methanol was added to 1 kg of the dried shredded cabbage, stirred occasionally, stored at room temperature for about 3 days, filtered, and the filtrate was concentrated under reduced pressure. Then, it is dried to obtain a powder (extract defined in the present invention). The yield is 3 when ethanol is used.
0 to 50 g, 90 to 10 when methanol is used
About 0 g is obtained.

The extract obtained by the above-mentioned production method (extraction) is characterized in that it contains a high content of saccharides and puerarin. When the saccharides are converted into sucrose,
The lower limit is 20% and the upper limit is about 45%. Further, as puerarin, those having a range of 20 to 40% can be obtained.

In the present invention, the component (C) is 0.001 to 10% by weight, especially 0.0
It is preferably blended at 1 to 5% by weight.

Further, the whitening cosmetic composition of the present invention appropriately contains various optional components used in ordinary cosmetics, quasi-drugs, pharmaceuticals and the like other than the above-mentioned essential components as long as the effects of the present invention are not impaired. be able to. Examples of such optional components include purified water, ethanol, oily substances, moisturizers, thickeners, preservatives, emulsifiers, medicinal components, powders, ultraviolet absorbers, pigments, fragrances, emulsion stabilizers, pH adjusters, etc. Can be mentioned. Specifically, examples of the oily component include liquid paraffin, petrolatum, paraffin wax, squalane, beeswax, carnauba wax, olive oil, lanolin, higher alcohols, fatty acids, synthetic ester oils of higher alcohols and fatty acids, silicone oils, etc., and moisturizers. Examples thereof include sorbitol, xylitol, glycerin, maltitol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, sodium pyrrolidonecarboxylate, lactic acid, sodium lactate, polyoxypropylene fatty acid ester, polyethylene glycol and the like. As a thickener, carboxyvinyl polymer, carboxymethyl cellulose, polyvinyl alcohol, carrageenan, water-soluble polymers such as gelatin, electrolytes such as sodium chloride, potassium chloride, etc. Preservatives include urea, methylparaben, ethylparaben, propylparaben, butylparaben, sodium benzoate and the like, and emulsifiers include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyglycerin fatty acid ester, poly Oxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil,
Nonionic surfactants such as polyoxyethylene sorbitol fatty acid ester are listed, and powders include talc, sericite, mica, kaolin, silica, bentonite,
Examples thereof include vermiculite, zinc white, mica, titanium mica, titanium oxide, magnesium oxide, zirconium oxide, barium sulfate, red iron oxide, iron oxide and ultramarine. The whitening cosmetic composition of the present invention is preferably acidic to neutral (pH 7 or less) for the sake of system stability. Examples of the pH adjuster used here include buffers such as lactic acid-sodium lactate and citric acid-sodium citrate.

The whitening cosmetic composition of the present invention can be manufactured by a conventional method. In addition, the whitening cosmetic subject to the present invention is not limited to general skin cosmetics, but includes quasi drugs, external medicines, etc., and its dosage form also depends on its purpose. It can be arbitrarily selected and can be in the form of cream, ointment, emulsion, lotion, solution, gel, pack, stick or the like.

[0018]

EFFECTS OF THE INVENTION The whitening cosmetic composition of the present invention has a synergistic melanin production inhibitory effect by the combined use of L-ascorbic acid and / or a water-soluble derivative of L-ascorbic acid and a tea extract. It has an extremely excellent whitening effect on the skin and a preventive and therapeutic effect on spots and freckles caused by sunburn and the like.

[0019]

The present invention will be further described with reference to the following examples.
The present invention is not limited to these.

The evaluation of the whitening effect in this embodiment is as follows.
The whitening effect test for the UV-B-induced pigment spot shown below was performed. (Whitening Effect Test on UV-B Induced Pigment Spots) The upper arm inner part of 20 test subjects was irradiated with UV rays in the UV-B region at a dose twice as much as the minimum erythema dose once a day for 2 days for induction. The whitening effect of continuous application of the sample to the pigment spots twice a day for one month on the test site was examined. The evaluation was performed using a color difference meter (CMS-1200, manufactured by Murakami Color Co., Ltd.), the L * value was calculated from the obtained Munsell value, and the ΔΔL * value representing the recovery was used. The ΔΔL * value was defined as follows. The L * values of the sample-applied test site and the sample-unapplied test site immediately before the start of sample application are L ₀ , L ₀ ′, and
The L * value of each site after 1 month of continuous application is L ₁ , respectively.
ΔL * as L ₁ ′ is expressed by the following equation. ΔΔL * = (L ₁ −L ₀ ) − (L ₁ ′ −L ₀ ′) Further, the evaluation is shown by the average value of the evaluation points of 20 test subjects.

[0021]

[Table 1]

In the following examples, the compounding amount when a liquid herbal medicine extract was used was shown by weight% as a liquid.

Example 1 A cream having the composition shown in Table 2 was prepared according to the following production method, and its whitening effect by continuous application was evaluated. The results are shown in Table 2.

(Production method) 8 parts of the oil phase component [(1) to (6)]
The aqueous phase components [(7) to (16)] heated to 80 ° C. with stirring are added to the solution melted by heating at 0 ° C. and emulsified, then (17) is added, and then the mixture is cooled to room temperature with stirring.

[0025]

[Table 2]

From the results shown in Table 2, it can be seen that the cream of the present invention has an excellent whitening effect.

Example 2 Cream

[Table 3] (Composition) (% by weight) (1) Decaglyceryl stearate 1.8 (2) Polyoxyethylene cetyl ether 1.2 (3) Squalane 12.0 (4) Cetanol 6.0 (5) Palmitin Cetyl acid 3.0 (6) 1,3-butylene glycol 6.0 (7) Glycerin 3.0 (8) Tetrasodium edetate 0.1 (9) L-ascorbic acid phosphoric acid ester magnesium salt 3.0 ( 10) Kudzu root extract ^{* 3} 0.1 (11) Green tea extract ^{* 4} 3.0 (12) Citric acid / sodium citrate (35:65) 1.0 (amount to bring system pH to 5.5) (13) Purified water Remaining amount (14) Preservative proper amount (15) Perfume proper amount pH: 5.5

* 3: Ichimaru Falcos Co., Ltd., Kacon extract powder * 4: Ichimaru Falcos Co., Ltd., green tea liquid (solid content: 1.0 to 2.5% by weight)

(Production method) 8 parts of oil phase components [(1) to (5)]
The aqueous phase components [(6) to (14)] heated to 80 ° C. with stirring are added to the mixture melted by heating at 0 ° C. to emulsify, then (15) is added, and then the mixture is cooled to room temperature with stirring. .

Example 3 Emulsion

(Table 4) (Composition) (% by weight) (1) Polyoxytristearate ethylene sorbitan 1.0 (2) Glycerol oleate 1.0 (3) Glyceryl monostearate 0.5 (4) Squalane 6.0 ( 5) Glyceryl trioctanoate 2.0 (6) Cetyl octanoate 2.0 (7) Stearyl alcohol 2.0 (8) 1,3-Butylene glycol 5.0 (9) Glycerin 3.0 (10) Xanthan gum 0. 2 (11) Tetrasodium edetate 0.1 (12) L-ascorbic acid phosphoric acid ester magnesium salt 3.0 (13) Choji extract ^{* 5} 1.0 (14) Tea extract ^{* 6} 3.0 (15 ) Citric acid / sodium citrate (20:80) 1.0 (amount that brings the pH of the system to 5.9) (16) Purified water remaining amount (17) Preservative appropriate amount (18) Perfume appropriate amount pH: .9

* 5: Falco Rex Clove, manufactured by Ichimaru Falcos Co., Ltd. (solid content: 2.0 to 4.0% by weight) * 6: Green tea liquid (solid content: 1.0 to 1.0, manufactured by Ichimaru Falcos Co., Ltd.) 2.5% by weight)

(Production method) 8 parts of oil phase components [(1) to (7)]
The aqueous phase components [(8) to (17)] heated to 80 ° C. with stirring are added to the solution melted by heating at 0 ° C. to emulsify, then (18) is added, and then cooled to room temperature with stirring. .

Example 4 Essence (beauty essence)

(Table 5) (Composition) (wt%) (1) 1,3-butylene glycol 8.0 (2) glycerin 4.0 (3) xanthan gum 0.3 (4) sodium chondroitin sulfate 0.1 (5) hyalurone Sodium acid salt 0.05 (6) Ethanol 3.0 (7) Polyoxyethylene polyoxypropylene decyl tetradecyl ether 0.3 (8) Tetrasodium edetate 0.1 (9) L-ascorbic acid phosphoric acid ester magnesium salt 3.0 (10) Aloe extract ^{* 7} 1.0 (11) Tea extract ^{* 8} 5.0 (12) Citric acid / sodium citrate (35:65) 1.0 (pH of system is 5.5) (13) Purified water Remaining amount (14) Preservative Suitable amount (15) Perfume Suitable amount pH: 5.5

* 7: Aloe M, manufactured by Ichimaru Falcos Co., Ltd.
S * 8: Green tea liquid (solid content: 1.0 to 2.5% by weight) manufactured by Ichimaru Falcos Co., Ltd.

(Manufacturing method) After stirring and dispersing the components (1) to (5), 65 parts of purified water is added to the mixture to give A. on the other hand,
The components (6), (7), (14) and (15) are dissolved by stirring, and the remaining amount of purified water is added to the mixture to give B. While stirring A, B is added and homogenized, and then the components (8) to (12) are added and dissolved by stirring.

Example 5 Lotion

(Table 6) (Composition) (wt%) (1) 1,3-butylene glycol 8.0 (2) glycerin 4.0 (3) sodium hyaluronate 0.1 (4) ethanol 3.0 (5) poly Oxyethylene polyoxypropylenedecyl tetradecyl ether 0.3 (6) Tetrasodium edetate 0.1 (7) L-ascorbic acid phosphoric acid ester magnesium salt 3.0 (8) Mulberry bark extract ^{* 9} 0. 5 (9) Tea extract ^{* 10} 3.0 (10) Citric acid / sodium citrate (8:92) 1.0 (amount to bring the system to pH 6.3) (11) Purified water balance (12) Preservative Agent proper amount (13) Perfume proper amount pH: 6.3

* 9: Ichimaru Falcos Co., Ltd., Falco Rex Sohakuhi (solid content: 0.3-0.8% by weight) * 10: Ichimaru Falcos Co., Ltd., green tea liquid (solid content: 1.0-) 2.5% by weight)

(Production method) After stirring and dispersing the components (1) to (3), 60 parts of purified water is added to the mixture to give A. on the other hand,
The components (4), (5), (12), and (13) are dissolved by stirring, and the remaining amount of purified water is added to the mixture to give B. While stirring A, B is added and homogenized, and then the components (6) to (10) are added and dissolved by stirring.

Example 6 Powder

[Table 7] (Composition) (wt%) (1) L-ascorbic acid phosphoric acid ester magnesium salt 30.0 (2) Scutellaria extract ^{* 11} 2.0 (3) Tea extract ^{* 12} 1.0 (4 ) Cetyl palmitate 12.0 (5) Hydrogenated soybean phospholipid 5.0 (6) D-mannitol 50.0

* 11: Ichimaru Falcos Co., Ltd., Ougon Extract Powder * 12: Ichimaru Falcos Co., Ltd., green tea liquid (solid content: 1.0 to 2.5% by weight)

(Production method) (1) to (6) are uniformly stirred and mixed.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuharu Masuda 2-9-1-302 Yamate, Funabashi City, Chiba Prefecture (72) Mitsutomo Kimura 2606-6 Akabane, Kai Town, Haga-gun, Tochigi Prefecture (72) Inventor Imokawa Genji 1022-89 Himurocho, Utsunomiya City, Tochigi Prefecture

Claims (2)

[Claims] 1. The following components (A) and (B) (A) one or more selected from the group consisting of L-ascorbic acid and water-soluble derivatives of L-ascorbic acid (B) containing a tea extract Whitening cosmetics. 2. The whitening cosmetic composition according to claim 1, further comprising the following components (C) and (C) kudzu root extract.