JP2010111613A - Aqueous bleaching cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueous bleaching cosmetic excellent in bleaching effect of course, in addition without showing unfavorable use feelings such as sticky feeling and creaky feeling, and at the same time excellent in humectant effect for skin. <P>SOLUTION: This aqueous bleaching cosmetic includes (A) rhododendrol expressed by formula (1), (B) one or more selected from diglycerol, a sugar alcohol, an oligosaccharide, and an alkylglucoside and (C) one or more selected from water soluble polymers. A nonwoven fabric-impregnated cosmetic is obtained by impregnating the aqueous bleaching agent with the nonwoven fabric. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a novel aqueous whitening cosmetic that is excellent in skin whitening effect and usability, and more specifically, rhododendrol, one or more selected from diglycerin, sugar alcohol, oligosaccharide, and alkyl glucoside, and The present invention relates to an aqueous whitening cosmetic containing at least one selected from water-soluble polymers as an essential component. The present invention also relates to a nonwoven fabric impregnated cosmetic that does not sag from the nonwoven fabric and has a high moisturizing effect.

  Conventionally, various water-whitening cosmetics containing whitening active ingredients have been proposed in order to prevent skin darkening, spots and freckles and to keep white skin. Ascorbic acid derivatives are well-known as effective in suppressing melanin formation and preventing stains and freckles, and have been widely used in aqueous whitening cosmetics. In order for the whitening effect of the active ingredient to be fully exerted, it is indispensable to prevent skin dryness, moisturize the skin and keep it healthy. In recent years, due to the impact of global warming and changes in the living environment, the humidity of the outside environment has progressed, and consumers who are suffering from dry skin are on the rise, so both the whitening effect and the excellent skin moisturizing effect have been achieved. The need for water-based whitening cosmetics is increasing year by year. Among these, non-woven fabric impregnated cosmetics containing active ingredients with excellent whitening effects are simple because water-based whitening cosmetics are impregnated into non-woven fabrics, and high whitening and moisturizing effects are expected simultaneously due to the non-woven fabric blocking effect. As such, consumer needs are high.

  However, when using a highly versatile ascorbic acid derivative at present, it is a major problem that the feeling of use and irritation such as stickiness and creaking derived from a high concentration of ascorbic acid derivative occur, and the whitening effect and the moisturizing effect on the skin. Moreover, it was very difficult to achieve a more comfortable feeling. In particular, when a large amount of water-soluble polymer and ascorbic acid derivative are combined for the purpose of enhancing the moisturizing effect or producing a non-woven fabric cosmetic that is excellent in moisturizing effect without dripping, the formulation will be stable when applied to the skin. It was likely to occur and was a major cause of discomfort during use. Accordingly, there has been a strong demand for an aqueous whitening cosmetic composition that stably and effectively contains a whitening active ingredient and that simultaneously achieves an excellent moisturizing effect and skin feel.

  Rhododendrol is known as one of the whitening active ingredients other than ascorbic acid derivatives. It has a strong melanin production inhibitory effect and skin pigmentation (stains, freckles, etc.) caused by exposure to ultraviolet rays. It is disclosed that it has the effect of improving (refer patent document 1). As a topical skin preparation containing rhododendrol, it contains a topical skin preparation that improves antibacterial properties and relieves irritation when formulated with phenoxyethanol, includes an amphiphilic polymer and a reducing agent, and contains a solubilizer. No skin external preparation excellent in stability is disclosed (see Patent Documents 2 to 3).

Japanese Patent No. 3340935 JP 2008-007432 A JP 2008-081491 A

In the above circumstances, there has been a demand for an aqueous whitening cosmetic that does not have a sticky or squeaky feeling like an aqueous whitening cosmetic containing an ascorbic acid derivative as a whitening ingredient, and that has an excellent moisturizing effect on the skin. However, just using a known rhododendrol as a whitening component instead of an ascorbic acid derivative as a whitening component, it is not possible to obtain an aqueous whitening cosmetic with such a feeling of use and a moisturizing effect, and further development is necessary. Sex was left. That is, the present invention aims to provide an aqueous whitening cosmetic that not only has an excellent whitening effect, but also does not exhibit an unpleasant use feeling such as a sticky feeling or a squeaky feeling, and at the same time has an excellent moisturizing effect on the skin. It is what.

  As a result of studying various whitening components in combination with other various components, the present inventor found that when a specific compound called rhododendrol was used as the whitening component, the specific compound was converted to diglycerin, sugar alcohol. The inventors have found that the above object can be achieved by combining with a compound such as oligosaccharide or alkyl glucoside and a water-soluble polymer, thereby completing the present invention. That is, the present invention is (A) one or more selected from rhododendrol represented by the following formula, (B) diglycerin, sugar alcohol, oligosaccharide, alkyl glucoside, and (C) a water-soluble polymer. It exists in the water-based whitening cosmetics characterized by containing a seed | species or more. Moreover, 2nd this invention exists in said water-whitening cosmetics characterized by the (B) component being diglycerin.

  Furthermore, the present inventor has found that when the above-mentioned aqueous whitening cosmetic is impregnated into a nonwoven fabric, the moisturizing effect on the skin is particularly excellent. That is, a third aspect of the present invention is a nonwoven fabric-impregnated cosmetic characterized by impregnating a nonwoven fabric with the above-described aqueous whitening cosmetic.

  The aqueous whitening cosmetic composition of the present invention contains rhododendrol as a whitening component and exhibits an excellent whitening effect, as well as an unpleasant feeling of use such as stickiness and squeakiness due to the effect of combination with other components. In addition, it has an excellent moisturizing effect on the skin. Moreover, the nonwoven fabric-impregnated cosmetic of the present invention is particularly excellent in feeling of use and skin moisturizing effect. Furthermore, the water-based whitening cosmetic composition of the present invention is excellent in stability over time in the preparation of rhododendrol, has no skin irritation, and is excellent in safety.

  Hereinafter, the configuration of the present invention will be described in detail. Rhododendrol [4- (p-hydroxyphenyl) -2-butanol] used as the component (A) in the present invention is a known compound and is known to be contained in Acer nikoence Maxim. It has been. The rhododendrol used in the present invention has optical isomers, but the (+) isomer, the (−) isomer alone, or a mixture (±) thereof can also be used. Although there is no restriction | limiting in particular as a compounding quantity of the rhododendrol used for this invention, If it mix | blends 0.01 mass% (henceforth only%) or more on the basis of the total amount of aqueous | whitening whitening cosmetics, the effect on skin will be carried out. Is more preferable because it is more realistic. Moreover, when 0.5% or more is blended, the melanin production inhibitory effect can be exerted more strongly, which is preferable. The upper limit of blending is preferably 5.0% by mass in terms of properties as an aqueous whitening cosmetic.

  In the present invention, as the component (B), at least one selected from diglycerin, sugar alcohol, oligosaccharide, and alkyl glucoside is blended. Diglycerin used in the present invention is a dimer of glycerin and is a known compound.

  Examples of the sugar alcohol used in the present invention include sorbitol, mannitol, galactitol, xylitol, arabinitol, ribitol and the like obtained by reducing a monosaccharide, maltitol and lactitol obtained by reducing an oligosaccharide. In addition, at least one hydroxyl group of these sugar alcohols may be modified with an appropriate organic residue such as acylation, etherification, addition of alkylene oxide, or acetalization. Among these, sorbitol and maltitol are particularly preferable.

  Oligosaccharides used in the present invention are those in which about 2 to 10 monosaccharides are bound, for example, sucrose, trehalose, trehalulose, cellobiose, palatinose, lactose, raffinose, cyclodextrin, xylooligosaccharide, fructo-oligosaccharide, galacto-oligo Examples thereof include sugar, maltooligosaccharide, inulooligosaccharide, dairy oligosaccharide, soybean oligosaccharide, isomaltooligosaccharide, cellooligosaccharide, and manno-oligosaccharide. In addition, at least one hydroxyl group of these oligosaccharides may be modified with an appropriate organic residue such as acylation, etherification, addition of alkylene oxide, acetalization. Among these, raffinose, trehalose, and xylooligosaccharide are particularly preferable.

  Examples of the alkyl glucoside used in the present invention include methyl glucoside, ethyl glucoside, polyoxyalkylene alkyl glucoside, and the like. As the polyoxyalkylene alkyl glucoside, one obtained by adding ethylene oxide and / or propylene oxide to alkyl glucoside is used. The average number of moles of ethylene oxide and / or propylene oxide added is preferably about 10 to 20 moles. Moreover, as an alkyl group couple | bonded with sugar, the thing of short chain lengths, such as a methyl group, an ethyl group, a propyl group, is preferable. The diglycerin used in the present invention is a product obtained by dehydration condensation of two molecules of glycerin.

  In this invention, 1 or more types chosen from said diglycerin, sugar alcohol, oligosaccharide, and alkyl glucoside are mix | blended as (B) component. Of these, diglycerin is preferably used in terms of effects. As a compounding quantity of (B) component in the water-based whitening cosmetics of this invention, 0.01 to 5% is preferable on the basis of the total amount of water-based whitening cosmetics, and 0.1 to 3% is especially preferable. If it is in these compounding ranges, the feeling improvement effect will be realized more.

  Examples of the water-soluble polymer (C) used in the present invention include synthetic water-soluble polymers, semi-synthetic water-soluble polymers and natural water-soluble polymers that can be generally used for cosmetics.

  Examples of the synthetic water-soluble polymer include ethylene oxide-propylene oxide block copolymer, carboxyvinyl polymer, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether, sodium polyacrylate, polyethylene oxide and the like. Among these, carboxyvinyl polymers (for example, “Carbopol 940” and “Carbopol 941” manufactured by BF Goodrich) are particularly preferable.

Examples of the semi-synthetic water-soluble polymer include carboxymethyl cellulose or a salt thereof (for example, sodium salt, potassium salt), cellulose-based polymer such as ethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methylhydroxypropyl cellulose; And starch-based water-soluble polymers such as carboxymethyl starch and methyl starch; alginic acid-based water-soluble polymers such as alginate propylene glycol ester and alginate; and polysaccharide-based water-soluble derivatives such as hyaluronic acid derivatives.

  Examples of natural water-soluble polymers include guar gum, locust bin gum, quince seed, galactan, gum arabic, tragacanth gum, pectin, mannan, starch, xanthan gum, dextran, succinoglucan, curdlan, gelatin, casein, albumin, collagen, alkaligenes Examples include polysaccharide polymers derived from Latus B-16 strain (for example, “Alkalane” (trade name) manufactured by Hakutosha Co., Ltd., hereinafter referred to as B16 polymer). Among these, xanthan gum and B-16 polymer are particularly preferable.

  The water-soluble polymer of component (C) may be selected from the various water-soluble polymers described above and used alone or in combination of two or more. The total amount of the water-soluble polymer is preferably from 0.001% to 2%, particularly preferably from 0.005 to 1% by mass, based on the total amount of the aqueous whitening cosmetic. If it is these ranges, the effect of a touch improvement can be actualized more.

  The aqueous whitening cosmetic composition according to the present invention is a cosmetic composition mainly composed of an aqueous solution other than cream / milky lotion, such as skin lotion and cosmetic liquid (oil component is 5% or less). Its properties are transparent or translucent liquid, gel-like.

  In addition to the above essential components (A) to (C), components usually blended in pharmaceuticals, quasi-drugs, cosmetics and the like within the qualitative and quantitative ranges that do not impair the effects of the present invention, such as surfactant , Oily ingredients, moisturizers, antioxidants, preservatives, fragrances, various vitamins, chelating agents, colorants, UV absorbers, UV scattering agents, medicinal ingredients, inorganic salts, pH adjusters, alcohols, pigments, etc. Can be blended.

  In the nonwoven fabric impregnated cosmetic of the present invention, the material of the nonwoven fabric used for impregnating the aqueous whitening cosmetic is not limited to the cellulose fiber nonwoven fabric, and any flexible sheet conventionally used for sheet-like packs can be used. For example, a nonwoven fabric, Japanese paper, a web, etc. are mentioned. Among these, the cellulose fiber nonwoven fabric is optimal for reasons such as touch, wet texture, and tensile strength. In addition, it is the cellulose fiber nonwoven fabric, and synthetic fibers such as fibers other than cellulose fibers, such as polyester fibers, polypropylene fibers, nylon fibers, and other fiber materials are blended in a part thereof (these are collectively referred to as “ A cellulosic fiber nonwoven fabric ") can also be suitably used.

  Furthermore, the non-woven fabric is not limited to one made of a single non-woven fabric or the like, and may be a laminate integrated by combining two or more types of non-woven fabrics, sheets, paper, films, webs and the like. And a nonwoven fabric can be made into a suitable shape according to the objective. For example, a special shape covering only around the nose and eyes, a set of shapes covering the upper and lower halves of the face, and a rectangular shape for attaching to the wrist, knee, etc. The shape can be raised.

  EXAMPLES Next, although an Example is given and this invention is demonstrated further in detail, the technical scope of this invention is not limited at all by these Examples. In addition, all compounding quantities are the mass%.

-Sensory test method After 25 subjects used the sample for one month, they were asked to answer about the sensory characteristics of the sample. Based on the number of respondents who answered `` I felt a moisturizing effect '', `` No stickiness after application '', `` No squeak feeling after application '' for the questionnaire items of moisturizing feeling, stickiness, and squeaking, Evaluation was performed according to the following evaluation criteria. .

(Evaluation criteria for moist feeling)
◎: Evaluated when 20 or more of 25 people are moist ○: Evaluated when 15 or more of 25 people are moistened △: Evaluated when 10 or more of 25 people are moist X: Less than 10 of 25 people Evaluated when moist

(Evaluation criteria for stickiness)
◎: 20 or more out of 25 people evaluated that there was no stickiness ○: 15 or more out of 25 people evaluated that there was no stickiness △: 10 or more out of 25 people evaluated that there was no stickiness ×: Less than 10 out of 25 people evaluated that there was no stickiness

(Evaluation criteria for squeaky feeling)
◎: 20 or more out of 25 people evaluated that there was no squeaky feeling ○: 15 or more of 25 people evaluated that there was no squeaking feeling △: 10 or more of 25 people less than 15 people had no squeaking feeling Evaluation ×: Less than 10 out of 25 people evaluated that there was no squeaky feeling

Examples 1-9, Comparative Examples 1-15 (lotion)
Rhodendrol, one or more selected from sugar alcohols, oligosaccharides, alkyl glucosides, diglycerin and one or more selected from water-soluble polymers are blended according to the compositions in Tables 1 to 3, and the following adjustment method A cosmetic solution was prepared. The above sensory test was carried out for each lotion. The results are shown in Tables 1 to 3.

-Preparation methods (Examples 1-9, Comparative Examples 1-8)
(A) Dissolve component 1 in component 9.
(B) Dissolve the remaining components in component 14.
(C) (b) was added to (a) and mixed uniformly to obtain a lotion.

-Preparation method (Comparative Examples 9-15)
Components 1 to 13 were dissolved in Component 14 and mixed uniformly to obtain a lotion.

(Table 1)

(Table 2)

(Table 3)

  As is clear from the above results, the skin lotions of Examples 1 to 9, which are the products of the present invention, showed superior moisture retention and usability compared to the skin lotions of Comparative Examples 1 to 15.

Examples 10 to 12 (nonwoven fabric impregnated mask)
Aqueous whitening lotion having the following formulation was prepared by a conventional method and impregnated into a nonwoven fabric (cotton, pulp, rayon) to prepare a nonwoven fabric impregnated mask (Examples 10 to 12). Next, the usability of the nonwoven fabric impregnated mask was evaluated by a female panel (25 persons) according to the following evaluation method using a water-based whitening lotion that does not impregnate the nonwoven fabric as a comparative control.

・ Evaluation method Apply a non-woven impregnated mask on one face of the face before going to bed, and apply a whitening cosmetic directly on the other face. The sensory evaluation about feeling was evaluated.

Ingredients Component Blending amount ―――――――――――――――――――――――――――
Rhododendrol 2.0
Dipropylene glycol 8.0
Xanthan gum (Note 5) 0.15
Carboxyvinyl polymer (Note 7) 0.5
1,3-butylene glycol 4.0
Concentrated glycerin 5.0
Polyoxyethylene methyl glucoside (Note 4) 0.1
Diglycerin (Note 1) 0.7
pH adjusting agent Appropriate amount Chelating agent Appropriate amount Preservative Appropriate amount Purified water remaining amount

・ Results All 25 respondents said that the nonwoven fabric impregnated mask was better in use and moist after use regardless of the material of the nonwoven fabric. From this, it was recognized that the use and moisture retention were further improved by impregnating the non-woven fabric (regardless of the material) with the aqueous whitening cosmetic of the present application.

Example 13 (skin lotion)
An aqueous whitening cosmetic (skin lotion) having the following formulation was prepared by a conventional method.
Ingredients Component Blending amount ―――――――――――――――――――――――――――
Ethanol 8.0
1,3-butylene glycol 5.0
Dipropylene glycol 5.0
Concentrated glycerin 3.0
Rhododendrol 2.0
Dipotassium glycyrrhizinate 0.2
Sodium hyaluronate (* 1) 0.1
Sodium pyrosulfite 0.1
Maltitol (Note 8) 1.0
Phenoxyethanol 0.1
γ-aminobutyric acid (* 2) 0.1
Tea seed extract (* 3) 0.02
Camellia extract (* 4) 0.02
Juzudama extract (* 5) 0.1
Yukinoshita extract (* 6) 0.1
Chimp extract (* 7) 0.1
Purified water residual amount ―――――――――――――――――――――――――――
Note 8: Malbit liquid (produced by Hayashibara Biochemical Research Institute)
* 1: Hyaluronic acid FCH (FCH-120) (manufactured by Kibun Food Chemical Co., Ltd.)
* 2: BIO GABA (manufactured by Kyowa Hakko)
* 3: Tea extract (Maruzen Pharmaceutical Co., Ltd.)
* 4: Camellia seed extract (Maruzen Pharmaceutical Co., Ltd.)
* 5: Yokuinin extract BG-S (manufactured by Maruzen Pharmaceutical Co., Ltd.)
* 6: Yukinoshita extract (Ichimaru Falcos)
* 7: Chinpi extract BG40 (Maruzen Pharmaceutical Co., Ltd.)

Example 14 (Cosmetic liquid)
An aqueous whitening cosmetic (beauty liquid) having the following formulation was prepared by a conventional method.
Ingredients Component Blending amount ―――――――――――――――――――――――――――
Ethanol 4.0
Dipropylene glycol 10.0
Concentrated glycerin 10.0
Rhododendrol 1.0
Carboxyvinyl polymer (Note 7) 0.15
Xanthan gum (Note 5) 0.1
B16 polymer (Note 6) 0.01
Sodium pyrosulfite 0.1
Potassium hydroxide 0.07
Diglycerin (Note 1) 0.5
Phenoxyethanol 0.1
Yeast extract (* 8) 0.1
Olive leaf extract (* 9) 0.2
Apricot juice (* 10) 0.1
Rock cabbage extract (* 11) 0.1
N-methyl-L-serine 0.5
Purified water residual amount ―――――――――――――――――――――――――――
* 8: Dismutin BTJ (Penta Farm)
* 9: Olive leaf extract BG (Maruzen Pharmaceutical Co., Ltd.)
* 10: Apricot extract K (Esperis)
* 11: Atsuba Iwanaka extract BG (Maruzen Pharmaceutical Co., Ltd.)

  The aqueous whitening cosmetics of Examples 13 to 14 were excellent in whitening effect, excellent in feeling of use and moisturizing after use, and also excellent in stability over time in the preparation of rhododendrol.

  According to the present invention, it contains rhododendrol as a whitening component and not only exhibits an excellent whitening effect, but also does not exhibit an unpleasant use feeling such as a sticky feeling or a squeaky feeling, has an excellent moisturizing effect on the skin, It is possible to provide an aqueous whitening cosmetic that is also excellent in stability over time.

Claims (3)

(A) One or more types selected from rhododendrol represented by the following formula, (B) diglycerin, sugar alcohol, oligosaccharide, and alkyl glucoside, and (C) one or more types selected from water-soluble polymers. Water-based whitening cosmetics characterized by
The aqueous whitening cosmetic composition according to claim 1, wherein the component (B) is diglycerin. A non-woven fabric-impregnated cosmetic comprising the non-woven fabric impregnated with the aqueous whitening cosmetic composition according to claim 1 or 2.