JPH08133950A - Skin preparation for external use - Google Patents

Abstract

PURPOSE: To obtain a skin preparation for external use formulated with Ruscogenin, excellent in esp. skin beautifying effect, and good in both usability and safety. CONSTITUTION: This skin preparation for external use contains, as active ingredient, 0.001-20wt.% of Ruscogenin and/or its salt. Combination of the active ingredient with 0.001-20wt.%, based on this skin preparation, of an ascorbic phosphoric ester and/or placenta extract further potentiates the skin beautifying effect of this skin preparation. The Ruscogenin, which has activity to inhibit the production and action of chromatophore activating factor in the skin, suppresses the melanogenesis and proliferation of chromatophores. The Ruscogenin is a saponin obtainable from the extract of the roots of Ruscus aculeatus L. The skin preparation can be made into cosmetics and medicinal preparations of such formulations as milky lotion, lotion, cream, jelly, pack, powder, and ointment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is particularly excellent in whitening effect,
The present invention relates to an external preparation for skin which has good usability and safety.

[0002]

2. Description of the Related Art The skin aging phenomenon represented by pigmentation such as wrinkles and spots on the outer corners of the eyes and freckles appears earlier than other tissues and organs, and is often observed from the mid-twenties. It is considered that this is because the skin is in the outermost layer of the living body and is susceptible to external stimuli (stress) such as ultraviolet rays, oxygen and chemical substances. Deposition of melanin pigments such as ultraviolet rays, stress spots, and freckles on the skin,
It is caused by proliferation of pigment cells, which are melanin-producing cells, and enhancement of melanin-producing function in pigment cells. Recent studies have revealed that UV rays and stress increase the number of factors that activate pigment cells in the skin, causing spots and freckles. For the purpose of prevention and whitening, ascorbic acid and its derivatives have been conventionally used.

[0003]

However, it has been difficult for the conventionally used ascorbic acid or its derivative to sufficiently exert the inhibitory effect on pigmentation. The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a skin external preparation that is excellent in whitening effect that can directly and efficiently suppress pigmentation, and that has good usability and safety. To provide.

[0004]

Means for Solving the Problems As a result of intensive studies by the present inventors in order to achieve the above-mentioned object, the results of ruscogenin (Rusco
genin) and / or its salt has an excellent whitening effect,
They have found that they are also excellent in terms of usability and safety, and have completed the present invention. That is, the present invention relates to ruscogenin (Rus
Cogenin) and / or a salt thereof is an external preparation for skin. The whitening effect of ruscogenin and / or its salt, which is an active ingredient of the external preparation for skin of the present invention, is not known at all. Further, no external preparation for skin containing these is known at all.

The structure of the present invention will be described in detail below. Ruscogenin is a saponin obtained from the root extract of Nacidae (Butcher Bloom; Ruscus aculeatus L.). The ruscogenin and / or salt thereof of the present invention has an action of suppressing the production of pigment cell activating factor and its action in the skin, and as a result, suppresses melanin production of pigment cells and proliferation of pigment cells. Examples of the salt of ruscogenin include alkaline earth metal salts such as sodium salt and potassium salt, basic amino acids or alkanolamines, and esters thereof, and specific examples thereof include ruscogenin potassium salt.

The amount of ruscogenin and / or its salt to be blended can be appropriately selected according to its use form, purpose of use, method of use, dosage form, etc., but usually 0.001 to 20. 0% by weight, preferably 0.001
~ 5.0 wt%. Ruscogenin and / or its salt is used in combination with ascorbic acid phosphate and / or placenta extract to further enhance the whitening effect. In that case, the compounding amount of ascorbic acid phosphate and / or placenta extract can be appropriately selected, but it is usually 0.00 based on the total amount of the skin external preparation.
It is 1 to 20.0% by weight, preferably 0.01 to 5.0% by weight. These can be used alone or in combination of two or more. In addition, ruscogenin and / or its salt, which is an active ingredient of the external preparation for skin of the present invention, has no adverse effect locally or systemically.

The external preparation for skin of the present invention comprises an emulsion, lotion, cream, jelly, pack, powder, and
Cosmetics and pharmaceutical preparations of various dosage forms such as ointments can be prepared. Furthermore, other components usually used in addition to the above-mentioned essential components, for example, polysaccharides, cholesterols, plant extracts such as licorice, glycyrrhizic acid and its derivatives,
Glycyrrhetinic acid and its derivatives, hinokitiol,
Tocopherol and its derivatives, ascorbic acid and its derivatives, kojic acid and its derivatives, arbutin, hydroquinones, tranexamic acid, flavonoids, retinol, phosphatidylcholine and other phospholipids,
Antioxidants such as butylhydroxytoluene, UV absorbers, excipients, oils, surfactants, sequestering agents, p
An H regulator, an antiseptic, a moisturizer, a fragrance, water, an alcohol, a thickener, a polymer, a colorant and the like can be appropriately added if necessary.

[0008]

The present invention will be described in more detail based on the following examples. First, prior to the examples, the effectiveness of the present invention will be shown by giving examples of effect tests of the active ingredient of the present invention. A lotion was prepared by a conventional method based on the formulation of Table 1 and the whitening effect was examined.

<Test Method> 30 women aged 27 to 52 years old having spots, freckles and the like on the face were used as a panel, and each group was divided into 5 groups, and each component-containing lotion was administered 3 times a day.
It was applied to the face every day for a month, and the whitening effect after use was evaluated based on the following criteria. <Criteria> Remarkable effect: Pigmentation became inconspicuous. Effective: Pigmentation was significantly reduced. Slightly effective: Pigmentation became slightly thin. Ineffective: No change in pigmentation. <Judgment> A: When the rate of marked efficacy and efficacy among the subjects is 80% or more B: The rate of marked efficacy and efficacy among the subjects is 65 to 8
In the case of 0% C: Remarkably effective and effective ratio among subjects is 50 to 6
In the case of 5% D: In the case where the ratio of excellent and effective in the subjects is less than 50% <Results> The results are shown in Table 1 together with the prescription.

[0010]

[Table 1] ──────────────────────────────── Component 1 2 3 Comparative Example 1 Comparative Example 2 ──── ──────────────────────────── Ruscogenin 0.5 0.25 0.1 − − Ascorbic acid − − 3.0 3.0 − Phosphate ester Placenta extract − 0.25 − − 0.5 Ethanol 25 25 25 25 25 Polyoxyethylene oleyl alcohol 0.2 0.2 0.2 0.2 0.2 Glycerin 5.0 5.0 5.0 5.0 5.0 Purified water Residual Residual Residual Residual Residual ───────────────────── ──────────── Whitening effect A A A C C ─────────────────────────────── ─

From these results, it is understood that the external preparation for skin of the present invention has an excellent whitening effect. Next, the present invention will be described in more detail with reference to examples. The present invention is not limited to this. The blending amount is% by weight.

Example 1 Vanishing Cream Stearic Acid 5.0 Stearyl Alcohol 4.0 Stearic Acid Butyl Alcohol Ester 8.0 Glycerin Monostearic Acid Ester 2.0 Ruscogenin 0.5 Propylene Glycol 10.0 Glycerin 4.0 Caustic Potassium 0.0. 2 Preservative / antioxidant Proper amount Perfume Proper amount Ion-exchanged water Residual (production method) Propylene glycol, caustic potash, and ruscogenin are added to ion-exchanged water, dissolved and heated to 70 ° C (water phase). The other ingredients are mixed, heated and melted and maintained at 70 ° C. (oil phase). The oil phase is gradually added to the water phase, and after the addition is completed, the temperature is kept for a while to cause the reaction. After that, homogenize with a homomixer and stir well until 3
Cool to 0 ° C.

Example 2 Neutral Cream Stearyl Alcohol 7.0 Stearic Acid 2.0 Lanolin 2.0 Squalane 5.0 2-Octyldodecyl Alcohol 6.0 Polyoxyethylene (25 mol) Cetyl Alcohol Ether 3.0 Glycerin Mono Stearic acid ester 2.0 Ascorbic acid phosphoric acid ester 3.0 Ruscogenin sodium salt 1.0 Preservative / antioxidant Proper amount Ion-exchanged water Residual (production method) Ascorbic acid phosphoric acid ester and ruscogenin sodium salt And heat to 70 ℃
Keep (water phase). Other ingredients are mixed, heated and melted at 70 ℃
Keep (oil phase). The oil phase is added to the aqueous phase to carry out preliminary emulsification, and the mixture is uniformly emulsified with a homomixer and then cooled to 30 ° C. with thorough stirring.

Example 3 Cold Cream Solid Paraffin 5.0 Beeswax 10.0 Liquid Paraffin 41.0 Glycerin Monostearic Acid 2.0 Ester Polyoxyethylene (20 mol) Sorbitan Monolauric Acid Ester 2.0 Placenta Extract 1.0 Ruscogenin 2.0 Butylhydroxytoluene 0.4 Soap powder 0.1 Borax 0.2 Ion-exchanged water Residual fragrance Suitable amount Preservative Suitable amount (Production method) Soap powder, borax, placenta extract and ruscogenin are added to ion-exchanged water and dissolved by heating 70 Keep at ℃ (water phase). The other ingredients are mixed, heated and melted and maintained at 70 ° C. (oil phase). The oil phase is stirred into the water phase and gradually added to carry out the reaction. After completion of the reaction, homogenize with a homomixer,
After emulsification, cool to 30 ° C while stirring well.

Example 4 Emulsion Stearic acid 2.5 Cetyl alcohol 1.5 Liquid paraffin 10.0 Polyoxyethylene (10 moles) Monooleate 2.0 Polyethylene glycol 1500 3.0 Triethanolamine 1.0 Butcher Bloom Extract 0.05 Ascorbic acid phosphate 0.1 Ion-exchanged water Residual fragrance Suitable amount Preservative Suitable amount (Production method) Ion-exchanged water with polyethylene glycol 150
0, triethanolamine, ascorbic acid phosphoric acid ester, and ethanol extract of Butcher Bloom are added, dissolved by heating, and maintained at 70 ° C. (aqueous phase). The other ingredients are mixed, heated and melted and maintained at 70 ° C. (oil phase). The oil phase is added to the aqueous phase, preliminary emulsification is performed, and the mixture is homogenized with a homomixer. After emulsification, the mixture is cooled to 30 ° C. with thorough stirring.

Example 5 Emulsion Polyoxyethylene (20 mol) Behenyl ether 2.0 Sorbitan monopalmitate 1.5 Isostearyl palmitate 5.0 Isostearyl myristate 3.0 MC stearic acid 2.0 Cetanol 1.0 Beeswax 2.0 Liquid paraffin 3.0 Glycerin 2.0 Propylene glycol 5.0 Placenta extract 1.0 Arbutin 3.0 Butcher bloom extract 0.2 Ion-exchanged water Residual fragrance Suitable amount Preservative / antioxidant Suitable amount (Production method) Propylene glycol, placenta extract, arbutin and butterbloom hydrous ethanol extract are added to ion-exchanged water and dissolved by heating and kept at 70 ° C (aqueous phase). The other ingredients are mixed, heated and melted and maintained at 70 ° C. (oil phase). The oil phase is added to the aqueous phase, preliminary emulsification is performed, and the mixture is uniformly emulsified with a homomixer. After emulsification, the mixture is cooled to 30 ° C. with thorough stirring.

Example 6 Lotion (alcohol phase) 95% ethanol 10.0 polyoxyethylene hydrogenated castor oil 2.0 propylene glycol 4.0 oleyl alcohol 0.1 lecithin 2.5 (water phase) glycerin 0.8 Gymnema saponin 0.2 Ruscogenin 0.2 Ion-exchanged water Residual UV absorber Appropriate amount (manufacturing method) The aqueous phase and the alcohol phase are adjusted and solubilized.

Example 7 Peel-off type pack (alcohol phase) 95% ethanol 10.0 polyoxyethylene (15 mol) oleyl alcohol ether 2.0 ruscogenin 5.0 preservative proper amount perfume proper amount (water phase) polyvinyl alcohol 12.0 Glycerin 3.0 Polyethylene glycol 1500 1.0 Placenta extract 1.0 Ion-exchanged water Residual (manufacturing method) The water phase is adjusted at 80 ° C and cooled to 50 ° C.
Then, the alcohol phase adjusted at room temperature is added, and the mixture is uniformly mixed and allowed to cool.

[0019]

As explained above, the external preparation for skin of the present invention has the action of the essential components characteristic of the present invention.
It has an excellent whitening effect, prevents skin spots and freckles, and makes the skin moisturized and highly safe.

Claims (3)

[Claims] 1. An external preparation for skin, which comprises Ruscogenin and / or a salt thereof. 2. The external preparation for skin according to claim 1, wherein the compounding amount of Ruscogenin and / or its salt is 0.001 to 20.0% by weight. 3. A skin external preparation for whitening according to claim 1 or 2.
The skin external preparation described.