JPH09118613A - Skin cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a skin cosmetic containing L-ascorbic acid-2-phosphoric acid sodium salt and a divalent or higher metal salt, excellent in storage stability, and capable of rapidly changing a black skin into a light skin, preventing the generation of fine wrinkles and giving moisture to skin. SOLUTION: This skin cosmetic contains L-ascorbic acid-2-phosphoric acid sodium salt and a divalent or higher metal salt (e.g. magnesium dichloride, magnesium sulfate) in amounts of 0.001-30wt.%, preferably 0.01-10wt.%, respectively. The L-ascorbic acid-2-phosphoric acid sodium salt and the divalent or higher metal salt are compounded in a weight ratio of 50:1 to 1:50. The cosmetic is further suitably compounded with a colorant, a perfume, an antiseptic, a surfactant, a pigment, an antioxidant, a humectant, an UV absorber, etc., and subsequently prepared in the form of a cream, an emulsion, a beauty water, a pack, etc.

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.

L-ascorbic acid-2-sodium phosphate is a derivative developed for the purpose of stabilizing L-ascorbic acid. However, even the cosmetics containing this are not satisfactory in stability such as yellowing and odor during long-term storage, and their usefulness is also reduced, which is not satisfactory.

Therefore, as a result of intensive studies by the present inventors, L
-A skin cosmetic containing a certain amount of sodium ascorbic acid-2-phosphate and a salt of a metal having a valence of 2 or more has excellent storage stability due to these interactions, and as a result, a whitening effect and prevents wrinkles, They have found that they are excellent in skin beautifying effects such as moisturizing the skin, and have 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]

DISCLOSURE OF THE INVENTION The present invention which achieves the above-mentioned object, comprises L-ascorbic acid-2-sodium phosphate and 2
A skin cosmetic containing 0.001 to 30% by weight of a metal salt having a valency of 3 or more, respectively.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. L-ascorbic acid-2-sodium phosphate used in the present invention is a known substance. Its content is
0.001-30 based on the total amount of prescription ingredients of cosmetics
% By weight is preferable, and more preferably 0.01 to 10% by weight. If it is less than 0.001% by weight, whitening and skin beautifying effects are difficult to obtain, and if it exceeds 30% by weight, precipitation and crystals are likely to occur, which is not preferable.

Examples of the divalent or higher valent metal salt 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.

The blending amount is 0.001 to the total amount of cosmetics.
30% by weight is preferable, and 0.01 to 10 is more preferable.
% 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 likely to occur, which is not preferable.

The compounding ratio of L-ascorbic acid-2-sodium phosphate and a salt of a metal having a valence of 2 or more is 50: 1 by weight.
˜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. are achieved to 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 The same sample was stored in a thermostatic chamber at a temperature of 5 ° C. and 45 ° C. for 3 months, and the changes in appearance (color) and odor 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 ℃ are indicated by ◎, ○, Δ, and × according to the following criteria. In addition, when the precipitation of crystals or the separation of the emulsion occurred, it was described as “crystal precipitation” or “separation”. Appearance evaluation Exactly same ◎ Very slightly colored ○ Slightly colored △ Strongly colored × Odor evaluation Exactly same ◎ Slightly changed odor ○ Slightly changed odor △ Strongly changed odor ×

(2) Skin color lightness recovery test method The back skin of 20 subjects was irradiated with ultraviolet rays in the UV-B region at twice the minimum erythema dose, and a sample application site and a non-application site were set to determine the skin of each skin. The standard brightness (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 (wrinkle improvement, moisturizing property) A sample was continuously applied to the face of 25 test subjects, and the wrinkle improving effect and moisturizing effect were compared one month after continuous application with that before continuous application. evaluated. The evaluation was based on the number of people who answered that "the wrinkles were improved" and "the skin was moistened".

Examples 1 to 6 and Comparative Examples 1 to 5 L-ascorbic acid-2-sodium phosphate and a salt of a metal having a valence of 2 or more were blended in the composition shown in Table 1, and skin was prepared according to the following preparation method. A cream was prepared. The above test was carried out for each of them, 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 at 50 ° C. to prepare (A)
After stirring (B) into (A) while stirring to emulsify and disperse, the mixture is cooled to 30 ° C. while stirring to prepare.

Characteristics 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 was inferior to the examples of the present invention in that it had poor storage stability and no sufficient effect was observed.

Example 7 [Skin lotion] The skin lotion of the present invention having the composition shown in Table 4 was prepared by the following production 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 this Example 7 was excellent in storage stability and showed good results in various usefulness tests.

Example 8 [Day Essence] The day essence (daytime beauty essence) 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) is mixed at 70 ° C. and (B) at 50 ° C. to dissolve each component, and (B) is added to (A) and mixed and stirred for 30 minutes.
Prepared by cooling to ° C.

Characteristics The day 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 is a skin cosmetic having excellent storage stability and 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)

[Claims] 1. A sodium salt of L-ascorbic acid-2-phosphate and a salt of a metal having a valence of 2 or more are each contained in an amount of 0.001 to 30.
Skin cosmetics containing wt%.