JP3354768B2 - Skin cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic which is excellent in storage stability, has excellent effects such as quickly lightening dark-skinned skin, preventing wrinkles, and moisturizing the skin.

[0002]

2. Description of the Related Art Conventionally, for the purpose of suppressing melanin production, preventing or treating skin spots and freckles, promoting collagen metabolism and preventing wrinkles, L- for moisturizing skin
Contains ascorbic acid.

[0003] L-ascorbic acid has insufficient storage stability when incorporated into cosmetics. For this reason, various derivatives obtained by chemically modifying L-ascorbic acid have been developed.

[0004] L-ascorbic acid-2-sodium phosphate is a derivative developed for the purpose of stabilizing L-ascorbic acid. However, the cosmetics containing the same are not satisfactory, for example, they have insufficient stability such as yellowing and unpleasant odor when stored for a long period of time, and their usefulness is reduced.

[0005] The inventors of the present invention have conducted intensive studies and have found that L
-Skin cosmetics containing a certain amount of sodium ascorbic acid-2-phosphate and a salt of a divalent or higher valent metal have excellent storage stability due to these interactions, and as a result, prevent whitening effect and prevent wrinkles. The inventor has found that the present invention is excellent in skin beautiful effects such as moisturizing the skin, and has completed the present invention.

[0006] An object of the present invention is to provide a skin cosmetic composition which is excellent in storage stability, is effective in quickly lightening dark-skinned skin, preventing wrinkles, and moisturizing the skin. It is in.

[0007]

In order to achieve the above object, the present invention provides sodium L-ascorbic acid-2-phosphate,
It is a skin cosmetic containing 0.001 to 30% by weight of a metal salt having a valency or more.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. L-ascorbic acid-2-phosphate sodium used in the present invention is a known substance. Its content is
0.001 to 30 based on the total amount of the prescription components of the cosmetic
% By weight, more preferably in the range of 0.01 to 10% by weight. If the amount is less than 0.001% by weight, it is difficult to obtain a whitening effect and a beautiful skin effect. If the amount is more than 30% by weight, precipitation and crystals are liable to occur.

The salts of divalent or higher valent metals used in the present invention include zinc chloride, aluminum chloride, magnesium chloride, calcium chloride, zirconium chloride, barium chloride, zinc carbonate, calcium carbonate, magnesium carbonate, zinc sulfate, and aluminum sulfate. , Calcium sulfate, magnesium sulfate, and the like, but are not limited thereto.

[0010] The compounding amount of the cosmetic is 0.001 to
It is preferably 30% by weight, more preferably 0.01 to 10%.
% By weight. If it is less than 0.001% by weight, it is difficult to obtain a sufficient effect, and if it exceeds 30% by weight, precipitation and crystals are liable to occur.

The compounding ratio of sodium L-ascorbic acid-2-phosphate and a salt of a divalent or higher valent metal is 50: 1 by weight.
１ ： 1: 50 is preferred.

In the cosmetic of the present invention, in addition to the above-mentioned raw materials, pigments, fragrances, preservatives, surfactants, pigments, antioxidants, humectants, ultraviolet absorbers, etc., achieve the object of the present invention. It can be appropriately blended within the range.

The cosmetic preparation of the present invention includes creams, emulsions, lotions, packs and the like. For example, in the case of an emulsion or the like, this cosmetic can be produced by a usual method of emulsifying and dispersing an oil phase and an aqueous phase, each of which is heated and dissolved, and cooling.

[0014]

The present invention will be described below in detail based on examples and comparative examples. The percentages shown in the examples are percentages by weight. Storage stability test method described in the examples, skin color lightness recovery test method,
The practical test is as follows.

(1) Storage stability test After the same sample was stored in a thermostat at a temperature of 5 ° C. and 45 ° C. for 3 months, changes in appearance (color) and smell of the two over time were compared. The judgment result was 45 when compared with the product stored at 5 ° C.
Differences in color and odor of the products stored at ° C. were indicated by ◎, △, Δ, and × according to the following criteria. In addition, when precipitation of crystals or separation of an emulsion occurred, they were described as “crystal precipitation” and “separation”. Appearance evaluation Exactly the same ◎ Very slightly colored ○ Slightly colored △ Strongly colored × Smell evaluation Exactly the same ◎ Very slightly changed odor ○ Slightly changed odor △ Strongly changed odor ×

(2) Skin Color Lightness Recovery Test Method The UV light in the UV-B region was irradiated to the back skin of 20 subjects twice as much as the minimum erythema dose, and a sample application site and a non-application site were set, and the skin of each skin was set. The reference lightness (V0 value, V0 'value) was measured. Subsequently, the sample was applied to the application site twice a day for 15 times.
After continuous application for three weeks, the lightness (Vn value, Vn ') of the skin at the application site and the non-application site after 3, 6, 9, 12, and 15 weeks
Was measured, and the recovery of skin color was evaluated according to the following criteria. The lightness of the skin (Munsell color system V value)
Was calculated from the X, Y, and Z values obtained by measuring with a high-speed spectral colorimeter. The evaluation was shown by the average value of the evaluation points after 6 weeks for 20 subjects.

[0017]

(3) Practical test (improvement of wrinkle, moisturizing property) The sample was continuously applied to the face of 25 subjects, and the effect of improving wrinkle and moisturizing effect was compared one month after continuous use with that before continuous use. evaluated. The evaluation was based on the number of people who answered that "the wrinkles were improved" and "the skin was moistened".

Examples 1-6, Comparative Examples 1-5 Sodium L-ascorbic acid-2-phosphate and a salt of a divalent or higher valent metal were blended in the composition shown in Table 1, and the skin was prepared according to the following preparation method. A cream was prepared. The above test was performed for each, and the results are shown in Table 3. composition

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

Preparation Method (A) is uniformly dissolved at 70 ° C. and B is uniformly dissolved at 50 ° C.
After stirring (B) into (A) while stirring to emulsify and disperse, the mixture is cooled to 30 ° C. while stirring to prepare.

Properties The skin creams of Examples 1 to 6 of the present invention were excellent in storage stability and various usefulness. On the other hand, Comparative Examples 1 to
The skin cream of No. 5 had poor storage stability and did not show a sufficient effect, and was inferior to the examples of the present invention.

Example 7 [Skin lotion] The skin lotion of the present invention having the composition shown in Table 4 was prepared by the following method. composition

[0026]

[Table 4]

Preparation method Each component of (A) and (B) is mixed and dissolved, and (B)
Was added to (A) and mixed and stirred.

Properties The skin lotion of Example 7 was excellent in storage stability and showed good results in various usefulness tests.

Example 8 [Day Essence] The day essence (daytime serum) of the present invention having the composition shown in Table 5 was prepared by the following method. composition

[0030]

[Table 5] *, **: Givaudan

Preparation Method (A) was mixed and dissolved at 70 ° C. and (B) at 50 ° C., and each component was mixed and dissolved. (B) was added to (A), and mixed and stirred.
Prepared by cooling to ° C.

Characteristics The essence of Example 8 has excellent storage stability.
Good results were obtained in various usefulness tests.

[0033]

Industrial Applicability As described above, the present invention provides skin cosmetics having excellent storage stability, excellent effects such as quick lightening of dark-skinned skin, prevention of wrinkles, and moisturizing the skin. It is clear that the fee is provided.

Claims (1)

(57) [Claims] 1. The method according to claim 1, wherein sodium L-ascorbic acid-2-phosphate and a salt of a metal having a valence of 2 or more are used in an amount of 0.001 to 30.
Skin cosmetic containing 0.1% by weight.