JPH02178218A - Tanning skin cosmetic - Google Patents

Abstract

PURPOSE:To provide a skin cosmetic containing vitamin D3 or its derivative and having excellent tanning effect and skin-beautifying effect. CONSTITUTION:The objective skin cosmetic contains one or more kinds of compounds selected from vitamin D3 and its derivative (e.g. 1alpha- hydroxycholecalciferol or 1alpha,25-dihydroxycholecalciferol). The amount of the active component is preferably 0.001-5.0wt.% based on the whole cosmetic. The cosmetic mildly promotes the melanogenesis of skin and safely gives beautifully sun-tanned healthy skin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tanning skin cosmetic characterized by containing vitamin D or a derivative thereof.

[Prior art and problems to be solved by the invention] Conventionally, suntan cosmetics have either simply been formulated with a sunscreen agent that absorbs ultraviolet rays that cause sunburn, or have been formulated with a coloring agent such as dihydroxyacetone. Products are sold as suntan cosmetics. or,
A sunken cosmetic containing vitamin B+*11, which acts catalytically against the oxidation of dopa and promotes the production of melanin, has been proposed (Japanese Unexamined Patent Publication No. 47-35149), L.
.

Oh, this vitamin BI! Because they promote the absorption of ultraviolet rays, they may cause harmful effects such as inflammation on the skin.
It has been difficult to safely give beautiful, healthy skin of tan color. Furthermore, when vitamin B+tH is blended, there is uneven absorption into the skin, making it difficult to obtain a uniform tanning effect.

An object of the present invention is to provide a skin cosmetic with excellent tanning and skin beautifying effects.

[Means to solve the problem]

The present invention is a tanning skin cosmetic containing vitamin D or a derivative thereof.

Vitamin D used in the present invention refers to cholecalciferol, and vitamin Ds derivatives include 1α-hydroxycholecalciferol, 1α, 2
Examples include 5-dihydroxycholecalciferol, all of which are known.

All of these vitamin D or its derivatives are white crystals and odorless. In addition, these are easily soluble in organic solvents such as ethanol and chloroform, slightly soluble in fatty oils, and almost insoluble in water. More than one species can be arbitrarily selected and used.

The blending amount is 0.0% based on the total amount of skin cosmetics (composition).
A preferable range is 0.001 to 5.0% by weight (hereinafter abbreviated as wt%). The blending amount is 0. If the amount of OO is less than 1 wt%, the effect will not be sufficiently achieved, and even if it exceeds 5.0 wt%, no improvement in the effect commensurate with the increase can be expected.

The skin cosmetics of the present invention include, for example, rhosilanes.

It can be applied to emulsions, creams, packs, etc.

In addition to the above, the skin cosmetics of the present invention also contain pigments.

Flavors, preservatives, surfactants, pigments, antioxidants, and the like can be appropriately blended within the range that achieves the purpose of the present invention.

〔Example〕

The present invention will be explained in detail below with reference to Examples and Comparative Examples.

Furthermore, the tanning effect test and skin beautification effect test (sensory test) used to evaluate the tanning effect of the skin cosmetics of the present invention are as follows.

f-technique 1 Tanning effect test A 3 cm square test area was set up on the back skin of 20 test subjects, and 20 Qmg of the sample was applied once a day.
I went there continuously for several months. Skin color brightness before and after sample application (VB value, respectively).

Va value) was measured to evaluate the degree of skin tanning according to the criteria in Table 1.

Table 1 Vb-Va ≧ 0゜5 0, 5 > V b -V a ≧ 0
．． 3Q, 3 > V b −V a
≧0. 10, 1 > Vb −V
a≧00>Vb-Va The brightness of the skin (V value) was calculated from the Munsell value obtained by measuring with a high-speed spectrocolorimeter. Moreover, the evaluation was shown as the average value of 20 test subjects.

(2) Beautiful skin effect test (sensory test) 20 female subjects
The effects were evaluated after humans used the sample twice a day (morning and evening) for three consecutive months. The test results showed that the skin was moisturized in terms of skin wettability, uniformity, and rough skin. There was no uneven tanning effect. It is shown by the number of people who answered that they did not have rough skin.

Example 1-12. Comparative Example 1 Skin Lotion Skin lotions of Examples 1 to 12 and Comparative Example 1 were prepared by blending the following compositions and used in each test.

(1) Composition Propylene glycol 3.0 Glycerin 5.0 Methylparaben
0.1 Polyoxyethylene castor oil derivative 0.5 Ethanol 5.0 Vitamin D, etc. Remaining amount of purified water listed in Table 2 (2) Preparation method Add vitamin D3m and polyoxyethylene castor oil derivative to ethanol and stir to dissolve. Each skin lotion was prepared by sequentially stirring and dissolving the remaining ingredients.

(3) Characteristics The results of various tests conducted on the skin lotion are listed on the right side of Table 2.

As is clear from Table 2, the skin lotions of the Examples containing vitamin D and their derivatives had superior tanning effects and practical tests compared to the comparative examples containing no additives. In particular, Examples 5 to 12 containing vitamin D and derivatives were very excellent.

Examples 13-14. Comparative Example 2 Skin Cream Skin creams of Examples 13 to 14 and Comparative Example 2 were prepared by blending the following compositions and used in each test.

(111fi adult beeswax stearate cetanol squalane glycyrrhizinate monopotassium methyl paraben fragrance 3.0 8, 0 3.0 4.0 4, 0 0.1 0.5 The results of various tests on skin cream are shown in Table 2. It is listed in the right column.

As is clear from Table 2, the skin cream of the example containing vitamin DIM and its derivatives was more effective than the skin cream of the comparative example containing no additives.
3.0 composition Borax (sodium borate) 0.4 (2) Preparation method After stirring the oil phase component mixture and the water phase component mixture at 80°C, add the water phase component uniformly into the oil phase component, After mixing, each skin cream was prepared by gradually cooling.

(3) Characteristics [Effects of the Invention] As described above, by containing vitamin D, etc. in the skin cosmetic base as in the present invention, melanin production in the skin is moderately promoted, and the skin is safely and beautifully healthy. It is clear that the present invention provides an excellent tanning cosmetic that gives beautiful skin and also has a beautifying effect.

Claims (1)

[Claims] A tanning skin cosmetic containing one or more selected from the group consisting of vitamin D_3 and its derivatives.