JP4455665B1 - Emulsified cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emulsified cosmetic having a moisturizing effect and an effect of improving the skin barrier function.
SOLUTION: In emulsified cosmetics, a rice fermentation broth, and a water-holding oil that shows a paste at 20 ° C., particularly N-lauroyl-L-glutamic acid (cholesteryl or phytosteryl behenyl octyldodecyl), dipentaerythritol One or more selected from fatty acid esters, stearic acid hydrogenated castor oil, macadamian nut oil fatty acid phytosteryl, and cholesteryl hydroxystearate are contained.
[Selection] Figure 2

Description

  The present invention relates to an emulsified cosmetic containing a rice fermentation broth and a water hydrated oil that exhibits a paste form at 20 ° C.

  Human skin is exposed to a dry environment all year round due to the effects of dryness in the winter and cooling in the summer. In response to this situation, skin care preparations that moisturize the skin have been developed to improve the dryness of the skin. So far, as ingredients to be incorporated into cosmetics for the purpose of moisturizing, water-soluble moisturizers such as amino acids, mucopolysaccharides, organic acid salts and glycols, and ester oils with high water retention are generally known. It has been. (For example, see Patent Documents 1 and 2)

  On the other hand, rice fermentation liquor is conventionally said to be good for beauty and health. In recent years, researches by university hospitals and national pediatric hospitals have revealed that rice fermentation extract is effective for atopic dermatitis. Recently, utilization of such a fermented rice extract for bathing agents and cosmetics has been studied (see Patent Document 3).

JP 2006-083092 A JP 2007-153754 A Japanese Patent Laid-Open No. 7-53351

  However, when the rice fermentation broth is used for bathing agents and cosmetics, the heat retaining effect of the skin is recognized, but it cannot be said that the moisturizing effect is sufficient. For this reason, when an amount capable of exhibiting a sufficient moisturizing effect with the rice fermentation liquor alone is blended, there is a problem in that amino acids as the components are precipitated over time or coloring is observed.

  Therefore, in the present invention, an object of the present invention is to synergistically improve the moisturizing effect of the rice fermentation liquid and to obtain an emulsified cosmetic having an effect of improving the epidermal barrier function.

  The present inventors, together with rice fermentation broth, have a water-holding oil that shows a paste at 20 ° C., in particular N-lauroyl-L-glutamic acid (cholesteryl or phytosteryl behenyl octyldodecyl), dipentaerythritol fatty acid ester, It has been found that an emulsified cosmetic containing one or more selected from stearic acid hydrogenated castor oil, macadamian nut oil fatty acid phytosteryl, and cholesteryl hydroxystearate has both a moisturizing effect and an effect of improving the skin barrier function. It came to be completed.

  The emulsified cosmetic of the present invention exhibits an excellent moisturizing effect and an improved skin barrier function.

It is a figure which shows the time-dependent change of the moisture content at the time of apply | coating Example 1 and Comparative Examples 1 and 2. FIG. It is a figure which shows the time-dependent change of TEWL at the time of apply | coating Example 1 and Comparative Examples 1 and 2. FIG.

  The emulsified cosmetic of the present invention contains, as an essential component, a water-holding oil that shows a paste at 20 ° C. together with the rice fermentation liquor.

  The rice fermentation liquor is obtained by subjecting rice or rice bran to enzymatic digestion or saccharification with koji, or fermentation with liquor or yeast.

  Although the compounding quantity of the rice fermentation liquid in this invention is not specifically limited, Preferably, it is 0.01-10 mass%, More preferably, it is 0.1-5%. When the amount is less than 0.01% by mass, a sufficient moisturizing effect cannot be obtained. Moreover, when it mixes exceeding 10 mass%, the amino acid which is a containing component may precipitate with time or coloring may be recognized.

  The water-holding oil is an oil that shows a paste form at 20 ° C., and is not particularly limited as long as it can be blended into the external preparation for skin. In the present invention, the water retention refers to the water retention (%) measured by the following water retention test. The water-holding power test method involves weighing 10 g of a sample heated to 50 ° C. into a 200 ml beaker and gradually adding water at 50 ° C. while stirring at 3000 rpm with a Despera mixer until the water drains from the sample. The maximum amount (mass) at which water does not drain was measured, and this value was divided by 10 g of the sample and multiplied by 100 to obtain the water holding power (%).

  The water-holding oil of the present invention may be any oil as long as it can hold water in itself. Especially when the water-holding power is 100% or more, it holds water equal to or more than its own weight. Is preferable. Specifically, for example, lanolin, reduced lanolin, lanolin fatty acid, lanolin alcohol, lanolin derivatives such as lanolin acetate, hydroxy lanolin, and those modified with polyoxyalkylene, macadamian nut oil fatty acid phytosteryl, lauroyl glutamate dioctyldodecyl, Amino acid phytosterol, castor oil, stearic acid hydrogenated castor oil, polyhydric alcohol fatty acid ester such as shea butter, hexaglycerin fatty acid ester, decaglycerin fatty acid ester, dipentaerythritol fatty acid ester, cholesteryl hydroxystearate, etc. These may be used alone or in combination of two or more as required. Among these, from the viewpoint of the effect of the present invention, N-lauroyl-L-glutamic acid (cholesteryl or phytosteryl behenyl octyldodecyl), dipentaerythritol fatty acid ester, stearic acid hydrogenated castor oil, macadamian nut oil fatty acid Phytosteryl and cholesteryl hydroxystearate are preferred. In the present invention, the water-holding oil is used alone or in combination of two or more.

  Although the compounding quantity of the water holding oil agent in this invention is not specifically limited, Preferably it is 0.01-20 mass%, More preferably, it is 0.1-10 mass%. If it is less than 0.01% by mass, the skin barrier function improving effect may not be recognized. When it exceeds 20 mass%, stickiness may occur in the feeling of use.

  Furthermore, the emulsified cosmetic of the present invention must contain water. The amount of the emulsified cosmetic varies depending on the properties of the cosmetic and is not particularly limited, but is preferably 10 to 90%, more preferably 30 to 80%. It is.

  In addition to the above components, the emulsified cosmetic of the present invention includes an aqueous component, an oily component, a surfactant, a water-soluble polymer, a powder component, an antioxidant, an ultraviolet absorber, a powder, a fragrance, a preservative, Ingredients used in normal cosmetics such as colorants, cosmetic ingredients, and pH adjusters can be blended in a quantitative and qualitative range that does not impair the effects of the present invention.

  The properties of the emulsified cosmetic of the present invention are not particularly limited, and examples thereof include liquid, emulsion, cream, gel, spray, and solid. The dosage form of the emulsified cosmetic may be an oil-in-water type, a water-in-oil type, or a multiple emulsion system.

  The use of the emulsified cosmetic of the present invention is not particularly limited, and examples thereof include lotion, milky lotion, serum, pack, cream, sunscreen, cleansing, foundation, makeup base, eye shadow, mascara and the like. Of these, skin care cosmetics such as creams and serums are preferred because the excellent effects of the present invention can be realized.

  The present invention will be described below with reference to examples, but the technical scope of the present invention is not limited thereto.

  Using the formulations shown in Table 1, emulsified cosmetics according to Example 1 and Comparative Examples 1 and 2 were prepared by a conventional method, and the moisturizing effect and the skin barrier function improving effect were evaluated.

[Moisturizing effect]
The skin moisture content was measured using SKICON-200 (manufactured by IBI S Co., Ltd.) as an electrical conductivity measuring instrument. The measurement is performed three times before coating, 30 minutes after sample coating, and 60 minutes after coating, and the relative water content before coating is shown in Table 2 and FIG.

  As shown in Table 2 and FIG. 1, in the examples of the present invention, the water content of the epidermis was higher than that of the comparative example in which the hydrated oil component and the rice fermentation liquor were each blended twice as much. That is, it was shown that the water content of the epidermis is synergistically improved by using the hydrated oil and the rice fermentation broth together.

[Effect of improving skin barrier function]
As an index of the effect of improving the epidermal barrier function, the transdermal moisture transpiration (hereinafter abbreviated as TEWL) was measured using a Tewmeter TM210. The measurement is performed three times before coating, 30 minutes after sample coating, and 60 minutes after coating, and the relative values with TEWL before coating as 1 are shown in Table 3 and FIG. Note that the higher the skin barrier function, the lower the value of TEWL.

  As shown in Table 2 and FIG. 2, in the Example of this invention, the skin barrier function higher than the comparative example which mix | blended each double amount of water-holding oil and the rice fermentation liquor was shown. That is, it was shown that the epidermal barrier function was synergistically improved by using the hydrated oil and the rice fermentation broth together.

  Other examples of the present invention are shown.

  Using the formulation shown in Table 4, emulsified cosmetics according to Examples 2 to 5 were prepared by a conventional method. These cosmetics were excellent in the moisturizing effect and the skin barrier function improving effect.

[Example 6] Emulsion (1) Squalane 10.0 (mass%)
(2) Methylphenylpolysiloxane 4.0
(3) Stearic acid hydrogenated castor oil 1.0
(4) Hydrogenated soybean phospholipid 0.1
(5) Polyoxyethylene monostearate
Sorbitan (20E.O.) 1.3
(6) Sorbitan monostearate 1.0
(7) Glycerin 4.0
(8) Methyl paraoxybenzoate 0.1
(9) Carboxyvinyl polymer 0.15
(10) Purified water 57.55
(11) Rice fermentation broth 0.8
(12) Arginine (1% by weight aqueous solution) 20.0
Production method: The oil phase components (1) to (6) are heated and dissolved at 80 ° C. On the other hand, the aqueous phase components (7) to (10) are dissolved by heating at 80 ° C. The oil phase component is added to this while stirring and uniformly emulsified with a homogenizer. After the emulsification, cooling is started, and (11) and (12) are sequentially added and mixed uniformly.

  The emulsion shown in Example 6 was excellent in the moisturizing effect and the skin barrier function improving effect.

[Example 7] Cream (1) Squalane 10.0 (mass%)
(2) Stearic acid 2.0
(3) Stearic acid hydrogenated castor oil 1.0
(4) Hydrogenated soybean phospholipid 0.1
(5) Cetanol 3.6
(6) Lipophilic glyceryl monostearate 2.0
(7) Glycerin 10.0
(8) Methyl paraoxybenzoate 0.1
(9) Arginine (20 mass% aqueous solution) 15.0
(10) Purified water 40.2
(11) Carboxyvinyl polymer (1% by weight aqueous solution) 15.0
(12) Rice fermentation liquid 1.0
Production method: The oil phase components (1) to (6) are heated and dissolved at 80 ° C. On the other hand, the aqueous phase components (7) to (10) are dissolved by heating at 80 ° C. The oil phase component is added to this while stirring and uniformly emulsified with a homogenizer. (11) is added after completion | finish of emulsification, cooling is started, (12) is added at 40 degreeC, and it mixes uniformly.

  The cream shown in Example 7 was excellent in the moisturizing effect and the skin barrier function improving effect.

[Example 8] Cosmetic liquid (1) Purified water 31.45 (mass%)
(2) Glycerin 10.0
(3) Sucrose fatty acid ester 1.3
(4) Carboxyvinyl polymer (1% by weight aqueous solution) 17.5
(5) Sodium alginate (1% by weight aqueous solution) 15.0
(6) Polyglyceryl monolaurate 1.0
(7) Macadamia nut oil fatty acid phytosteryl 3.0
(8) N-lauroyl-L-glutamic acid di (phytosteryl-2-octyldodecyl) 2.0
(9) Hardened palm oil 2.0
(10) Squalane (derived from olive) 1.0
(11) Behenyl alcohol 0.75
(12) Beeswax 1.0
(13) Jojoba oil 1.0
(14) 1,3-butylene glycol 10.0
(15) L-arginine (10% by mass aqueous solution) 2.0
(16) Rice fermentation liquid 1.0
Production method: The aqueous phase components (1) to (6) are mixed and dissolved by heating at 75 ° C. On the other hand, the oil phase components (7) to (14) are mixed and dissolved by heating at 75 ° C. Next, the oil phase component is added to the aqueous phase component and preliminary emulsification is performed, followed by uniform emulsification with a homomixer. Cooling is started after completion of emulsification, and (15) is added at 50 ° C. Cool further to 40 ° C., add (16) and mix evenly.

  The essence shown in Example 8 was excellent in the moisturizing effect and the skin barrier function improving effect.

[Example 9] Water-in-oil emollient cream (1) Liquid paraffin 30.0 (% by mass)
(2) Microcrystalline wax 2.0
(3) Stearic acid hydrogenated castor oil 5.0
(4) Diglycerin oleate 5.0
(5) Sodium chloride 1.3
(6) Potassium chloride 0.1
(7) Propylene glycol 3.0
(8) 1,3-butylene glycol 5.0
(9) Methyl paraoxybenzoate 0.1
(10) Rice fermentation liquid 1.0
(11) Purified water 47.4
(12) Fragrance 0.1
Production method: Dissolve (5) and (6) in a part of (11) to 50 ° C., and gradually add to (4) heated to 50 ° C. with stirring. After mixing this, it disperse | distributes uniformly to (1)-(3) heated and melt | dissolved at 70 degreeC. (7) to (10) are added to the remainder of (11) heated and dissolved at 70 ° C. with stirring, and emulsified with a homomixer. Cooling is started after completion of emulsification, and (12) is added at 40 ° C. and mixed uniformly.

  The water-in-oil emollient cream shown in Example 9 was excellent in the moisturizing effect and the skin barrier function improving effect.

Claims (1)

An emulsified cosmetic for improving the skin barrier function , comprising a rice fermentation broth and stearic acid hydrogenated castor oil .

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