JP2001199865A - Bleaching cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bleaching cosmetic comprising an ascorbic acid derivative and native gellan gum and having good feeling to uses and stability with passage of time. SOLUTION: This bleaching cosmetic comprises an ascorbic acid derivative and a native gellan gum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a whitening cosmetic.
More specifically, the present invention relates to a whitening cosmetic containing an ascorbic acid derivative as an active ingredient, and having good feel and stability over time during use.

[0002]

2. Description of the Related Art Conventionally, whitening cosmetics contain ascorbic acid derivatives, kojic acid, placenta extract and the like as active ingredients and have various dosage forms such as lotions, emulsions, creams and powders. Cosmetics have been proposed. Above all, many derivatives such as salts and esters have been studied as ascorbic acid derivatives, and many products containing them as active ingredients have been put on the market.

[0003] However, ascorbic acid derivatives are
When applied on the skin, it may feel sticky, and in the case of lotion etc., it may cause precipitation, and if it is salt itself, it may cause problems such as coagulation of the emulsion and causing creaming. In order to solve these problems, an invention in which a nonionic surfactant and an electrolyte are added for stabilization (JP-A-63-243014), and an invention in which a specific organic acid and a water-soluble polymer are used for stabilization ( JP-A-5-339123) and the like have been proposed.

Further, when the whitening cosmetic is an O / W emulsion type, a method of imparting viscosity to the entire system and improving the stability is used. Specifically, waxes and water-soluble polymers are used. A method of using was studied. When waxes are used, it is possible to impart viscosity to the system without being greatly influenced by the components to be blended, and it is possible to improve the stability. In some cases, it is difficult to obtain the desired sensory characteristics, for example, the feeling is too strong, and the spread during use becomes heavy. In addition, the method using a water-soluble polymer is easy to mix and is useful when a sensory property such as a crisp feel is required, but the water-soluble polymer is affected by the electrolyte and salt. Depending on the components mixed in the same system, it was impossible to form a gel structure, and in some cases, viscosity could not be imparted to the entire system.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a whitening cosmetic which contains an ascorbic acid derivative as an active ingredient and has a good feel and stability over time during use. I do.

[0006]

Means for Solving the Problems In view of such circumstances, the present inventors have conducted intensive research to solve the above problems, and as a result,
It has been found that a whitening cosmetic containing an ascorbic acid derivative as an active ingredient and containing native gellan gum can provide a whitening cosmetic that has a refreshing feel and stickiness when used and has good stability over time. It was completed.

[0007] That is, the present invention relates to a whitening cosmetic comprising an ascorbic acid derivative and native gellan gum.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below. The ascorbic acid derivative used in the present invention is blended for the purpose of whitening effect, and includes metal salts of ascorbic acid such as potassium, sodium, magnesium, calcium, potassium phosphate, potassium phosphate, magnesium phosphate and calcium phosphate. And sulfate salts such as sodium sulfate salt and potassium sulfate salt. Among them, preferred are ascorbic acid phosphoric acid salts, which easily provide a whitening effect and have good stability. In the present invention, ascorbic acid derivatives can be used alone or in combination of two or more.

The amount of the ascorbic acid derivative used in the present invention is not particularly limited as long as the whitening effect can be obtained, but is preferably 0.5 to 5% by mass.
(Hereinafter, mass% is%), more preferably 1 to 4%.

[0010] The native gellan gum used in the present invention is formulated for the purpose of obtaining stability of the whole system with time, fresh feel, and suppression of stickiness. A natural polysaccharide having a repeating unit, for example, a microorganism Pseudomonas
Erodia (Pseudomonas elodea)
This is a gum obtained by separating and purifying polysaccharides produced outside the cells when fermented.

As the native gellan gum, commercially available products such as Kelcogel LT100 (manufactured by Dainippon Pharmaceutical Co., Ltd.) can be advantageously used.

The content of native gellan gum in the whitening cosmetic composition of the present invention is not particularly limited, but is preferably 0.01 to 3.0%, more preferably 0.02 to 1.0%.

The native gellan gum (acetyl group-containing gellan gum) used in the present invention has a structure that is not deacetylated, unlike the deacetylated gellan gum which has been blended in foods, cosmetics and the like as a gelling agent or stabilizer. . Due to this difference in structure, a conventional aqueous solution of deacetylated gellan gum is susceptible to the effects of pH and salt, but has the characteristic that native gellan gum is not susceptible. Therefore, even in a whitening cosmetic containing an ascorbic acid derivative as an active ingredient, it becomes possible to impart viscosity to the system and improve the stability over time. Further, this is an effect that can be obtained only by the combination of the present invention, which suppresses the fresh feeling of use and the stickiness of the ascorbic acid derivative on the skin.

The base of the whitening cosmetic of the present invention is aqueous, and in addition to the above-mentioned components, components used in ordinary cosmetics such as oils, powders, water-soluble polymers, polyhydric alcohols, Lower alcohols, ultraviolet absorbers, antioxidants, bactericides, preservatives, fragrances, colorings, cosmetic ingredients, etc. can be used within a range that does not impair the effects of the present invention. It is possible by the method of manufacturing.

The whitening cosmetic of the present invention can be used for applications such as lotion, milky lotion, cream, beauty essence, etc., and can be used by hand, or impregnated in a nonwoven fabric. Method and the like.

[0016]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 4 and Comparative Examples 1 to 5 Emulsions were prepared according to the compositions shown in Table 1 and the following production methods. The obtained emulsion was subjected to stability over time and sensory evaluation. Table 1 also shows the results.

[0018]

[Table 1] * Dainippon Pharmaceutical Co., Ltd.

<Production Method> A: Each of 1-2, 3-9, and 10-18 is uniformly dissolved at 70 ° C. B: Add 1 to 2 of A to 3 to 9 of A and emulsify. C: Add 10 to 18 of A to B and mix uniformly. D: Cool C to room temperature and add 19, 20 to make an emulsion.

<Evaluation of stability over time>
The sample was allowed to stand at 5 ° C. and 40 ° C. for one month at constant temperature, visually observed for changes in appearance, and evaluated according to the following criteria.

[0021]

<Whitening effect> Examples 1-4 and Comparative Example 1
Each of the cosmetics Nos. To 5 was applied to the skin twice a day for one month by 10 expert evaluation panels, and the whitening effect was determined according to the following criteria.

(Judgment Criteria) ：: Whitening effect such as spots and freckles became less noticeable △: Whitening effect such that stains and freckles became slightly less noticeable ×: Whitening effect such as less stains and freckles It is not allowed

(Judgment) Eight or more evaluated as ○: ◎ 5 to 7 evaluated as ○: 3 to 4 evaluated as ○: △ 2 or less evaluated as ○: ×

<Sensory Evaluation> Examples 1-4 and Comparative Example 1
About 10 cosmetics, the following items were evaluated by 10 female professional panels, and judgment was made according to the following criteria.

(Evaluation items)-Whether the user feels fresh when used (+) or not (-)-Whether stickiness is suppressed after use (+) or not (-)

(Judgment Criteria) Eight or more people were rated as +: ◎ 5 to 7 people were rated as +: ○ 3 to 4 people were rated as +: Δ 2 or less were rated as +: ×

As is evident from the results in Table 1, the emulsions of Examples 1 to 4 of the present invention are fresher when used compared to the emulsions of Comparative Examples 1 to 5 without stickiness after use. It turned out to be an excellent emulsion having good stability over time.

Example 5 (Pearl Gloss Whitening Essence) (Ingredients) (%) 1. Ascorbic acid phosphate 2.0 ester magnesium 2. Ascorbic acid 0.2 Sodium citrate 0.3 4. 4. Methylcellulose (1% aqueous solution) 5.0 Kelcogel LT-100 0.05 6. Propylene glycol 5.0 7. Dipropylene glycol 10.0 8. Glycerin 3.0 9. Aloe extract 5.0 10. Hydrogenated soybean phospholipid 1.5 11. Titanium mica 0.3 12. 12. Methyl parahydroxybenzoate qs. Refined olive oil 0.5 14. Vaseline 0.2 15. Appropriate amount of fragrance 16. Purified water balance

<Production Method> A: 1 to 9 and 16 are uniformly dissolved at 70 ° C. B: 10 to 14 are uniformly dissolved at 70 ° C. C: Add B to A and emulsify. D: Cool C to room temperature and add 15 to make a pearlescent whitening serum.

The pearl glossy whitening serum of the present invention was found to be an excellent pearl glossy whitening serum having good stability over time without feeling sticky after use.

Example 6 Whitening Lotion (Component) (%) 1. Hydrogenated egg yolk phospholipid 0.3 Cetyl phosphate 0.05 3. Perfume 0.02 4.1 1,3-butylene glycol 5.0 5.0. Glycerin 2.0 6. 6. Ascorbic acid phosphate 2.0 ester magnesium 7. Methyl parahydroxybenzoate qs Aloe extract 5.0 9. Kelcogel LT-100 0.01 10. Purified water balance

<Production Method> A: 1 and 2 are uniformly dissolved at 70 ° C. B: 4 to 10 are uniformly dissolved at 70 ° C. C: Add 3 to A, mix uniformly, and disperse in B. D: Cool C to room temperature to obtain a whitening lotion.

The whitening lotion of the present invention was found to be an excellent whitening lotion that was fresh when used, had no stickiness after use, and had good stability over time.

Example 7 Whitening Cream (Component) (%) Silicon KF6015 (Note 1) 2.0 2. Silicon KF995 (Note 2) 12.0 3. Sarakos 99 (Note 3) 3.0 4. 4. Dimethyl polysiloxane 1.0 (100 mm2 / s) Propylene glycol 5.0 6. Ethanol 10.0 7. Glycerin 2.0 8. Kelcogel LT-100 1.0 9. 10. Ascorbic acid phosphoric acid 3.0 ester magnesium 10. Methyl parahydroxybenzoate qs Appropriate amount of fragrance 12. Remaining purified water (Notes 1 and 2) Shin-Etsu Chemical Co., Ltd. (Note 3) Nisshin Oil Co., Ltd.

<Production Method> A: 5 to 10 and 12 are uniformly dissolved at 70 ° C. B: 1 to 4 are uniformly dissolved at room temperature. C: Add B to A and emulsify. D: Cool C to room temperature and add 11 to make a whitening cream.

The whitening cream of the present invention was found to be an excellent whitening cream that was durable when used, had no stickiness after use, and had good stability over time.

Example 8 (Whitening Gel) (Components) (%) 1. alkyl-modified carboxy 0.1 vinyl polymer Quince Seed Extract 10.0 3. Kelcogel LT-100 1.5 4. PEG6000 3.0 5. 5. Polyoxypropylene (9) 1.5 Diglyceryl ether Dipropylene glycol 5.0 7. Ethanol 10.0 8. Appropriate amount of flavor 9. 10. Sodium hydroxide (1% aqueous solution) 3.0 Sodium ascorbate 2.011. Purified water balance

<Production Method> A: 1 to 6, 11 are uniformly dissolved at 70 ° C. B: Disperse 7, 8 uniformly in A, and cool to room temperature. C: Add 9, 10 to B to obtain a whitening gel.

The whitening gel of the present invention was found to be an excellent whitening gel which was fresh when used, had no stickiness after use, and had good stability over time.

According to the present invention, there is provided a whitening cosmetic containing an ascorbic acid derivative as an active ingredient and having a good feel and stability over time by using native gellan gum. .

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AA112 AA122 AB032 AB242 AB292 AC012 AC022 AC102 AC122 AC182 AC302 AC402 AC482 AC842 AC902 AD022 AD042 AD092 AD152 AD262 AD302 AD351 AD352 AD492 AD572 AD641 AD642 CC03 CC04 CC05 DD23 DD27 DD31 DD41 EE01 EE06

Claims (2)

[Claims] 1. An ascorbic acid derivative and a compound represented by the following general formula (1): (Where n represents an integer) A whitening cosmetic comprising a native gellan gum comprising a repeating unit represented by the following formula: 2. The whitening cosmetic according to claim 1, which contains 0.5 to 5% by mass of an ascorbic acid derivative.