JPH01313412A - Skin cosmetic - Google Patents

Abstract

PURPOSE:To obtain a skin cosmetic having immediate and durable effects on improvement of chapped skin and stability containing glycerin, tocopherol or a derivative thereof, camphor and cyclodextrin. CONSTITUTION:A skin cosmetic containing 15-40wt.% glycerin, 0.1-0.7wt.% tocopherol or derivative thereof (e.g., alpha-tocopherol, linoleic acid dl-alpha-tocopherol), 0.1-0.7wt.% camphor and 0.1-5wt.% cyclodextrin (e.g., alpha-cyclodextrin). This cosmetic is a cosmetic for preventing chapped skin having both moisture retaining effects and stability. The cosmetic may be further blended with an anti-inflammatory component (e.g., allantoin) and a blood circulation promoting component (e.g., gamma-oryzanol).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a skin cosmetic having an excellent effect of preventing rough skin. More specifically, the present invention relates to a skin cosmetic containing glycerin, tocopherol or a derivative thereof, and camphor as main ingredients.

Conventional technology and issues There are two ways to prevent skin roughness: applying a moisturizing agent to the skin to increase the moisturizing ability of the epidermis, and a method that increases blood circulation to the skin's capillaries. A method of improving rough skin by applying a drug to improve blood circulation in peripheral blood vessels is known.

However, each of these methods has its advantages and disadvantages; methods that rely on moisturizing effects have an immediate effect, but their effect on preventing rough skin is short-lived, while methods that promote blood circulation improve skin roughness by - When this happens, the effect is long-lasting but not immediate.

It has been well known that glycerin has high moisturizing properties for the skin. However, such moisturizing properties are short-term, and do not provide long-lasting improvement in rough skin by promoting blood circulation in capillaries. Improvement in rough skin due to moisturization lacks sustainability, and glycerin alone is still insufficient to improve rough skin. cannot be obtained.

On the other hand, tocopherols and camphor are known to have a blood circulation-promoting effect and are included in various cosmetics, but their effects are mild, promoting blood circulation in the skin, eyes, and body, and enhancing the skin's original functions. These drugs aim to improve rough skin, and the immediate effects of these drugs are insufficient.

As a result of repeated studies on the above-mentioned problems, the present inventors found that by combining glycerin, tocopherols, and camphor, an extremely immediate and long-lasting effect on improving rough skin could be obtained, and the present invention was completed. reached.

Means for Solving the Problems The present invention provides a skin cosmetic containing 15 to 40% by weight of glycerin, tocopherol or a derivative thereof, and camphor.

The cosmetic composition of the present invention contains 15 to 40% by weight of glycerin. If the glycerin content is less than 15% by weight, a sufficient immediate moisturizing effect cannot be obtained, and if it exceeds 40% by weight, there will be problems with the feeling of use (stickiness) and the stability of the emulsion system will be poor.

On the other hand, the tocopherols to be incorporated into the skin cosmetics of the present invention include α-tocopherol, β-tocopherol, γ-tocopherol,
-tocopherol, δ-tocopherol, and the like. These may be derived from natural products or may be obtained by synthesis, and may be used alone or in combination of two or more.

In addition, as tocopherol derivatives, acetic acid dQ-α-
Tocopherol, d12-α-tocopherol linoleate, dQ-α-tocopherol liruinate, dρ-α-tocopherol nicodinate, dQ-α-ascorbic acid
Examples include tocopherol, d12-α-tocopherol succinate, and the like.

The content of such tocopherols in cosmetics ranges from 0.1 to
Preferably it is 0.7% by weight. If the amount is less than 0.1% by weight, the blood circulation promoting effect is insufficient and there is no effect on preventing rough skin, while if it exceeds 0.7% by weight, the effect will not increase.

In addition, camphor compounds to be added to the cosmetics of the present invention include:
Examples include d-camphor and dQ-camphor.

The amount of camphor compounded in cosmetics is OI ~ 07% by weight.
It is preferable that If the blending amount is less than 0.01% by weight, there is no effect of preventing rough skin by promoting blood circulation, while on the other hand, if the amount is less than 0.07% by weight,
Exceeding this level is undesirable as it may cause irritation to the skin.

The cosmetic composition of the present invention contains a large amount of glycerin (15 to 40% by weight), which tends to cause system separation in emulsified cosmetic compositions such as creams and milky lotions. In addition, components such as tocopherols and camphor are difficult to enter the system in solubilized cosmetics such as lotions and serums. Therefore, it is necessary to incorporate a large amount of emulsifiers and solubilizers, but when the amount of emulsifiers and solubilizers increases, the product becomes more irritating to the skin.

Therefore, by further adding cyclodextrins to the cosmetics of the present invention, glycerin, tocopherols,
Prevents system instability caused by incorporating camphor. Examples of the cyclodextrin include α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, and mixtures thereof, and one or more of these may be blended. The amount of such cyclodextrin blended is preferably 0.1 to 5% by weight. If the blending amount is less than 0.1% by weight, the effect of improving stability will not be exhibited, while if it exceeds 5% by weight, it will not dissolve in the aqueous phase and will precipitate as crystals, causing problems in use. .

Furthermore, the cosmetic composition of the present invention may contain various ingredients having anti-inflammatory effects depending on the formulation. Examples of such anti-inflammatory ingredients include allantoin, aloe powder, ictamolguaiazulene and its derivatives, glycyrrhizinic acid and its derivatives, glycyrrhizic acid and its derivatives, methyl salicylate, glycyrrhedinylhinokidiol stearate, and the like.

Furthermore, the cosmetic composition of the present invention may contain various other components having blood circulation promoting effects. Examples of such components include γ-oryzanol, nicotinic acid, nicotinamide, benzyl nicotinate, ρ-menthol, dQ-menthol, and the like.

Next, the results of testing the moisturizing properties and feel of the cosmetics of the present invention will be shown. A test composition was prepared by blending the components shown in Table 1 below, and evaluated by the following method. The blending amounts in Table 1 mean % by weight.

Sample preparation method: Ingredients Weight % Oil phase: Beeswax 2.5 Stearic acid 3.0 Squalane
8.0 Isopropyl Valmitate
3.0 Cetyl octoate 6.0
Setanol 3.0 Aqueous phase: Ethyl paraoxybenzoate 0.3 Triethanolamine 0.6 Glycerin
Purified water listed in Table 1 Remainder Other components Tocopherol derivatives d-camphor or dQ-camphor listed in Table 1 β-cyclodextrin Stearyl glycyrrhetinate
〃Allantoin〃σ
-Menthol〃The above oil phase and water phase are both heated to 75°C, both phases are mixed and dispersed uniformly, and then cooled. Other components are added at 45°C, and further cooled to obtain a sample.

[Measurement of moisture retention]

0.39 of each sample was applied to the upper arms of 10 people with healthy skin. Moisture measurement is done using 5kin Surface Hydr.
Each conductance value (unit: 2 μd) was measured immediately after coating and the next day (24 hours after coating) using ometer I B-355 (manufactured by IBS). The measurements were performed in a room with a temperature of 20°C and a humidity of 60%.

The results are shown in Table 1.

〔sensory evaluation〕

After applying each sample in Table 1 to 18 female panelists, the skin condition was evaluated as "improving effect on rough skin,""feeling of use," and "
We evaluated whether each of the three items in the "Overall Evaluation" felt good or not. The first is the number of people who felt that each item was answered correctly.
Shown in the table.

Test Example 1 containing glycerin, tocopherol and camphor as seen from the conductance values in Table 1
~B shows high moisturizing ability even on the day after application. on the other hand,
Comparative Test Examples 1, 2 and 4, which contain glycerin but lack any of the above essential components, or Comparative Test Example 3, which contains a low amount of glycerin, have excellent moisturizing ability immediately after application, but have a low moisturizing effect after 24 hours. . In addition, those with high conductance values both immediately and after 24 hours are [
Many people felt that it had a 4 rating, indicating that it had an effect on improving rough skin.

The skin cosmetics of the present invention are manufactured in the form of creams, milky lotions, lotions, lotions, packs, scalp hair growth products, etc. by known methods.

In addition, the cosmetic composition of the present invention may further contain known ingredients as appropriate, depending on the type thereof, within a range that does not impair the performance of the cosmetic composition of the present invention.

Next, the present invention will be explained in more detail based on examples.

A skin cosmetic was prepared according to a conventional method using the following composition.

Example 1 (cream) Ingredients ■% Acetic acid d
Q-α-tocopherol 0.20d-
Camphor 020 Liquid Paraffin 18.00 Paraffin 500 Stearic Acid 3.00 Cetol 300 Carboxy Vinyl Polymer 0.30 Potassium Hydroxide 020 Polyspecial Diethylene Sorbitan Monostearate (20E, O,)
1. 50 Glyceryl monostearate 3.00 β-cyclodextrin
0.70 glycerin
25.00 Ethyl paraoxybenzoate
0.30 fragrance
02010-Example 2 (emulsion) Ingredients Weight % linoleic acid dQ-α-tocopherol 0.30 dQ
- Camphor 0.30
Stearic acid 100 Setanol 1.00
Olive oil 3.00
Squalane 6.00 White petrolatum 2.00 Self-emulsifying glyceryl monostearate 1.50 PolyA diethylene norpitane monostearate (20
E, O,) 1. 0 0 Cyclodextrin mixture 1.00 Glycerin 18.00 Ezyl paraoxybenzoate 0.20 Flavor
0. IO Example 3 (Hair Cream) Yield 1 External 1 Weight % Nicotinic acid d (1-α-tocophero-fiv 0
．． 20=11-dQ-camphor 0
．． 25 white petrolatum
8.00 Isopropyl myristate
8.00 Cetanol
300 liquid paraffin
is, o.

Polyoxyethylene (20E, O,) cetyl ether
2.00 polyethylene (15E, o, glyceryl monostearate) 2.5
0 glycerin 200β
-Cyclodextrin 0.6 Flavor 0.3
0 Sodium benzoate 0.4
5100.00 Example 4 (cosmetics) Ingredients Weight% dQ
-α-tocopherol 0.20
dQ-camphor 0
．． 20 polyoxyethylene (20E, O,) hydrogenated castor oil l, 00 glycerin
18.00 Cyclodextrin mixture
1.00 ethanol
12.00 fragrance
0.15 Example 5 (cream) Ingredients Weight% d-
Camphor 0.30
dQ-α-tocopherol acetate 0.
20 Stearyl glycyrrhetinate 0.
10 Squalane 10.
00olive oil
8.00 stearic acid
4. OO cetanol
2.00 Lipophilic glyceryl monostearate
3.00 polydiethylene (20E, O,) glyceryl monostearate 2.
00β-cyclodextrin 0
．． 50 concentrated glycerin 25
．． 00 Ethyl paraoxybenzoate 0
．． 3014-Example 6 (cosmetic liquid) Ingredients Weight% d-
Camphor 0.35
d12-α-tocopherol acetate 0.
20 Dipotassium glycyrrhetinate 0.
40 glycerin ts,
o.

Polyoxyethylene hydrogenated castor oil (40E, O,)
0,80 ethanol
10.00 Ethyl paraoxybenzoate
0.05 fragrance
0.10 Effects of the Invention The skin cosmetics of the present invention have excellent moisturizing effects and are significantly effective in preventing rough skin.

Patent applicant: Sunstar Co., Ltd.

Claims (2)

[Claims] (1) A skin cosmetic containing 15 to 40% by weight of glycerin, tocopherol or a derivative thereof, and camphor. (2) The skin cosmetic composition according to item (1) above, containing 0.1 to 5.0% by weight of cyclodextrin.