JPH0624954A - Cosmetic - Google Patents

Abstract

(57) [Summary] [Structure] The following components (A), (B) and (C): (A) urea, (B) clove, green tea, kudzu root, mulberry bark, licorice,
A cosmetic containing (C) water, one or two or more kinds selected from respective extracts of sardine, aloe and orange peel. [Effect] The water retention, keratolytic exfoliation, antibacterial action, skin absorption enhancement, etc. of the stratum corneum are maintained for a long period of time, and side effects such as skin irritation are not brought about.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics, and more particularly to a water-containing cosmetic in which urea can be stably mixed.

[0002]

2. Description of the Related Art Generally, urea is known to improve the water-retaining ability of the stratum corneum, and further has dermatologically important pharmacological actions such as keratolytic exfoliation action, antibacterial action, and skin absorption enhancement. In recent years, various attempts have been made to apply the above-mentioned function of urea to medicines and cosmetics.

In order to produce a urea-containing preparation, an aqueous urea solution must first be obtained. Urea is usually destabilized by the presence of water and decomposed into carbon dioxide and ammonia when stored for a long period of time, resulting in the above-mentioned efficacy. Loses the aqueous solution
The pH tends to rise to the non-physiological range. further,
In the case of emulsified cosmetics, the generated ammonia may disrupt the emulsified system and cause component separation.

In order to suppress the decomposition of urea in such a water-containing preparation, a urea stabilizer such as lactic acid (Japanese Patent Publication No. 47-
47662), hydroxylamine hydrochloride (JP-B-58-22475), aliphatic dicarboxylic acid (JP-A-52-105225), allantoin (JP-A-58-48441), ammonium compound (patent JP-A-59-87035), neutral amino acids, acidic amino acids or amino acid alkali salts (JP-A-59-1347).
No. 72) has been reported.

[0005]

However, although the above-mentioned conventional urea stabilizers have some effects, they are not sufficient to provide sufficient effects after long-term storage for several months. Therefore, it has been desired to develop a cosmetic containing a urea stabilizer that can withstand long-term storage without causing irritation to the skin or the like.

[0006]

[Means for Solving the Problems] The inventors of the present invention have conducted extensive studies in view of the above-mentioned circumstances, and as a result, urea-containing cosmetics have unprecedented stability and safety to the skin due to the addition of a specific plant extract. The present invention has been completed and the present invention has been completed.

That is, the present invention provides the following component (A),
(B) and (C): (A) urea, (B) clove, green tea, kudzu root, mulberry bark, licorice,
It is intended to provide a cosmetic characterized by containing (C) water, one or more kinds selected from respective extracts of sardine, aloe and orange peel.

The blending amount of urea of the component (A) used in the present invention in the cosmetic of the present invention is not particularly limited, but is 0.05.
-10.0 wt% (hereinafter simply referred to as%) is preferable.
If it is less than 0.05%, a sufficient action cannot be obtained, and if it exceeds 10%, the effect is hardly increased.

The plant extract of the component (B) used in the present invention is obtained by treating each of the above plants with a hydrophilic organic solvent such as water, methanol, ethanol, 1,3-butylene glycol or propylene glycol, or a mixed solvent thereof. And a powder obtained by drying the liquid substance obtained by extracting the liquid substance. For example, to obtain a clove extract, the clove buds are dried and finely chopped, a water / ethanol mixed solution is added to this, and the mixture is stirred at room temperature for immersion and squeezed to obtain an extract. Then, it may be filtered.

Examples of commercially available plant extracts of the component (B) include Falco Rex Clove, green tea liquid, cucumber extract powder, Falco Rex Sawakuhi, Ougon extract powder, Ougon Liquid B, Ougon Liquid E, Ougon Liquid SE (above). , Ichimaru Falcos Co., Ltd.) and the like.

The component (B) is preferably added in the cosmetic of the present invention in a solid content of 0.001 to 20%, particularly 0.005 to 10%.

The component (C) water used in the present invention is preferably purified water. The blending amount is not particularly limited,
Any amount can be used as long as it can be added to various cosmetics.

The pH of the aqueous phase of the cosmetic composition of the present invention is not particularly limited, but skin irritation may occur in a non-physiological pH range, which is not preferable. The preferred pH range is 5.0 to 8.0.

The buffer system for stabilizing the pH of the urea-containing aqueous solution is not particularly limited, and examples thereof include a phosphate buffer system, a citrate buffer system, and a phosphate-citrate buffer system.

The cosmetics of the present invention include ordinary cosmetics other than the above-mentioned essential components as long as the effects of the present invention are not impaired.
Various optional ingredients used in quasi-drugs, pharmaceuticals and the like can be appropriately mixed. Examples of such optional components include ethanol, oily substances, moisturizers, thickeners, preservatives, emulsifiers, medicinal components, powders, ultraviolet absorbers, dyes, fragrances, and emulsion stabilizers.

Specific examples of the oily component include liquid paraffin, petrolatum, paraffin wax, squalane, beeswax, carnauba wax, olive oil, lanolin, higher alcohol fatty acids, synthetic ester oils of higher alcohols and fatty acids, silicone oils, etc. As agents, sorbitol, xylitol, glycerin, maltitol,
Propylene glycol, 1,3-butylene glycol,
1,4-butylene glycol, sodium pyridonecarboxylate, lactic acid, sodium lactate, polyoxypropylene fatty acid ester, polyethylene glycol and the like can be mentioned. Thickeners include carboxyvinyl polymer, carboxymethyl cellulose, polyvinyl alcohol, carrageenan, gelatin and the like. Water-soluble polymer, sodium chloride,
Examples include electrolytes such as potassium chloride, preservatives such as methylparaben, ethylparaben, propylparaben, butylparaben, sodium benzoate, etc., and emulsifiers such as polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, and polyglycerin. Nonionic surfactants such as fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol fatty acid ester, etc. are mentioned, and powders include talc, sericite, mica, kaolin, silica, bentonite. , Vermiculite, zinc white, mica, mica titanium, magnesium oxide, zirconium oxide, barium sulfate, red iron oxide, iron oxide, ultramarine and the like.

The cosmetics to which the present invention is applied are not limited to general skin cosmetics, but include quasi-drugs, external medicines, etc., and their dosage forms are also selected according to the purpose. Can be selected arbitrarily, creamy, ointment,
It can be in the form of emulsion, lotion, solution, gel, pack, stick or the like. Among them, the cosmetic of the present invention is preferably a facial cosmetic.

The cosmetic composition of the present invention can be manufactured by a conventional method.

[0019]

EFFECTS OF THE INVENTION In the cosmetic of the present invention, urea, which is a component of the cosmetic, is extremely stable over a long period of time, so that its good physiological action, water retention in the stratum corneum, keratolytic peeling,
It has antibacterial properties, enhanced skin absorption, etc., and does not cause side effects such as skin irritation, and can be applied to various cosmetics.

[0020]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto.

Example 1 An emollient cream having the following composition was produced by the following method.

[0022]

(Table 1) (wt%) Oil phase components: (1) Vaseline 6.0 (2) Squalane 33.5 (3) Cetanol 4.0 (4) Jojoba oil 5.0 (5) Mono-fatty acid glycerin 2.0 (6) POE (20) sorbitan monolaurate 2.0 (7) Methylparaben 0.2 Aqueous phase component: (8) Glycerin 15.0 (9) Urea 5.0 (10) Stabilizer Types shown in Table 2 And quantity (11) Purified water Residual

(Manufacturing Method) The above oil phase components are mixed and heated to melt to 70 ° C. On the other hand, the aqueous phase component is heated and kept at 50 ° C. The oil phase part is added to this water phase part and emulsified by an emulsifying machine. The emulsion is cooled to a final temperature of 30 ° C. by a heat exchanger and then filled.

The obtained emollient cream was stored at 40 ° C., and the presence or absence of ammonia odor due to aging and the skin irritation (irritating sensation) were determined according to the following criteria.
The name was sensory evaluated. The results (average value) are also shown in Table 2.

(Evaluation Criteria) Ammonia odor: ◯: No ammonia odor, Δ: Slight ammonia odor, ×: Ammonia odor, Skin irritation: ◯: No skin irritation, Δ: Some skin irritation, ×; Skin irritation,

[0026]

[Table 2]

As shown in Table 2, the emollient cream of the present invention had good properties such as no odor of ammonia and no skin irritation over a long period of time. On the other hand, in the comparative example using the conventional stabilizer, the increase in ammonia odor and skin irritation with the passage of time was large.

Example 2 A lotion having the following composition was produced by the following method.

[0029]

(Table 3) (% by weight) (1) Ethanol 15.0 (2) Glycerin 5.0 (3) Polyethylene glycol 1500 2.0 (4) POE (20) Oleyl ether 2.0 (5) Methylparaben 0.2 (6) Urea 5.0 (7) Plant extract Types and amounts shown in Table 4 (8) Purified water Residue

(Production method) In purified water, (2), (3),
Add (6) and (7) and dissolve at room temperature. On the other hand, after adding (4) and (5) to ethanol and dissolving them at room temperature in the same manner, they were added to the aqueous phase to be solubilized, filtered, and then filled.

The lotion thus obtained was stored at 40 ° C. for 120 days and then evaluated in the same manner as in Example 1. The results are also shown in Table 4.

[0032]

[Table 4]

As shown in Table 4, the lotion of the present invention had good properties such as no odor of ammonia and no skin irritation for a long period of time.

Example 3 An emollient lotion having the following composition was produced by the following method.

[0035]

(Table 5) (wt%) Oil phase component: (1) Cetanol 1.0 (2) Squalane 5.0 (3) Vaseline 2.0 (4) Lanolin alcohol 0.5 (5) Stearic acid 2.0 ( 6) POE (20) sorbitan monolaurate 2.0 Water phase components: (7) Glycerin 3.0 (8) Propylene glycol 3.0 (9) Triethanolamine 1.0 (10) Urea 5.0 (11 ) Plant extract Types and amounts shown in Table 6 (12) Purified water Residue

(Manufacturing Method) The oil phase components are mixed, heated and dissolved, and maintained at 70 ° C. Similarly, the above water phase components are heated and mixed at 50 ° C., the above oil phase part is added to this water phase part, and the mixture is emulsified by an emulsifying machine. The emulsion was cooled to 30 ° C. and then filled.

The obtained emollient lotion was treated at 40 ° C.
After 120 days of storage, the same evaluation as in Example 1 was performed. The results are also shown in Table 6.

[0038]

[Table 6]

As shown in Table 6, the emollient lotion of the present invention had good properties such as no odor of ammonia for a long period of time and no skin irritation.

Example 4 A whitening cream having the following composition was produced by the following method.

[0041]

(Table 7) (wt%) Oil phase component: (1) Decaglyceryl stearate 1.8 (2) Polyoxyethylene cetyl ether 1.2 (3) Squalane 12.0 (4) Cetanol 6.0 (5) Cetyl palmitate 3.0 Aqueous phase component: (6) 1,3-butylene glycol 6.0 (7) Glycerin 3.0 (8) Edetate 4 sodium 0.1 (9) L-ascorbic acid phosphate magnesium ester Salt 3.0 (10) Plant extract Type and amount shown in Table 8 (11) Urea 5.0 (12) Sodium citrate 1.0 (13) Purified water Residue

(Manufacturing method) The oil phase components are mixed, heated and dissolved, and maintained at 70 ° C. Similarly, the above water phase components are heated and mixed at 50 ° C., the above oil phase part is added to this water phase part, and the mixture is emulsified by an emulsifying machine. The emulsion is cooled to 30 ° C. and then filled.

The whitening cream obtained is treated at 120 ° C. for 120 minutes.
After storage for a day, the same evaluation as in Example 1 was performed. The results are also shown in Table 8.

[0044]

[Table 8]

As shown in Table 8, the whitening cream of the present invention had good properties such as no smell of ammonia and no skin irritation for a long period of time.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshihiro Minematsu 11424, Cincinnati Courtbrook Village, Ohio, United States 11424

Claims (1)

[Claims] 1. The following components (A), (B) and (C): (A) urea, (B) Dingji, green tea, kudzu root, mulberry bark, licorice,
A cosmetic comprising (C) water, one or more kinds selected from respective extracts of sardine, aloe and orange peel.