JP2002121114A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic capable of providing a moisture keeping action and action effects of various cosmetics, etc., controlling volatilization of a water-soluble humectant, efficiently providing the skin with a moist feeling and retaining the feeling after use, effective especially for a bathing agent, skin lotion, various kinds of lotions, etc. SOLUTION: This cosmetic comprises two or more kinds of nonionic surfactants, an oil agent and water. The mixture of the nonionic surfactants has 6.5-10.5 HLB and at least two layers of an oil layer and an oil-in-water type emulsion layer are formed by adding the cosmetic into water or warm water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bath preparation, a lotion,
With regard to cosmetics such as lotions, by putting them into water or hot water, an oil-in-water emulsion layer that has a moisturizing action and the effect of various cosmetics, etc. The present invention relates to a cosmetic that gives a moist feeling and forms an oil layer to be retained.

[0002]

2. Description of the Related Art In cosmetics, especially bath agents, lotions, various lotions, etc., oil agents and various surfactants are often blended in order to obtain a washing action, a moisturizing action and the like. However, when these conventional cosmetics are poured into water or hot water, a product in which a part of the oil agent component floats on the water or hot water surface is not preferable in appearance. It is designed to be dissolved in Nevertheless, there are undesired products in which a part of the oil agent floats on the surface of the water or the surface of the molten metal. In conventional cosmetics containing such oils and surfactants, it is necessary to emulsify many oils in water or hot water in order to obtain a sufficient moisturizing action and the like. In this case, when the skin is in contact with water or hot water in which the oil agent is emulsified, the moisturizing effect can be realized, but after use, in a short time, the moisturizing effect accompanying the volatilization of the aqueous component is reduced. There is a tendency.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a moisturizing effect and the effect of various cosmetics, as well as to suppress volatilization of a water-soluble humectant after use and to efficiently apply to the skin. Gives moist feeling and can be kept, especially bath salts,
An object of the present invention is to provide an effective cosmetic for lotion, various lotions, and the like.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, obtained a mixture of two or more nonionic surfactants having a specific HLB with an oil agent and water. And at least two of an oily layer and an oil-in-water emulsion layer by being added to water or hot water.
By forming a layer, even if the amount of the oil agent used is almost the same as that of a conventional uniform emulsion, the water-soluble moisturizing component is suppressed from being volatilized, and an excellent moisturizing effect is obtained. The present invention was found to be excellent in storage stability and completed the present invention. That is, according to the present invention, the HLB of a mixture of nonionic surfactants containing two or more kinds of nonionic surfactants, an oil agent, and water and containing the same is 6.
5 to 10.5, and by pouring into water or hot water,
A cosmetic is provided, wherein at least two layers, an oil layer and an oil-in-water emulsion layer, are formed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The cosmetic of the present invention is particularly useful for bath salts, lotion, various lotions, and the like, and at least two layers of an oil layer and an oil-in-water emulsion layer are formed by being poured into water or hot water. Here, the oil layer is usually formed on the surface of the water or the surface of the molten metal, but this oil layer does not float on the surface of the water or the surface of the molten metal, but means a layer formed as a layer, preferably a uniform layer. In the present invention, the oil layer suppresses volatilization of the aqueous moisturizing component and the like in the oil-in-water emulsion layer from the skin, and alleviates skin irritation, thereby efficiently exhibiting a desired effect. Conceivable.

[0006] The nonionic surfactant used in the present invention comprises:
It is blended in a mixture of two or more. The HLB of the mixture is
It mix | blends so that it may become 6.5-10.5, Preferably it becomes 7.5-9.5. When one kind of nonionic surfactant is used, the stability of the whole product is deteriorated. When the HLB of the mixture is less than 6.5, the amount of oil floating on the surface of the water or the molten metal increases, and the feeling of use decreases. When the HLB of the mixture exceeds 10.5, the amount of oil floating on the surface of the water or the liquid decreases. However, a desired oil layer is not formed. H of the mixture of nonionic surfactants
LB can be calculated according to the following equation.

(Equation 1)

The nonionic surfactants used in the present invention include, for example, polyethylene glycol fatty acid esters such as polyethylene glycol monooleate; propylene glycol fatty acid esters such as propylene glycol monooleate; glycerin fatty acid esters; polyoxyethylene glycerin Polyglycerol fatty acid esters such as fatty acid esters, hexaglycerin monooleate, decaglycerin pentaoleate; sorbitan fatty acid esters; polyoxyethylene sorbitan fatty acid esters; polyoxyethylene sorbite fatty acid esters; polyoxyethylene hydrogenated castor oil; polyoxyethylene alkyl Ether; polyoxyethylene polyoxypropylene alkyl ether; polyoxyethylene alkyl phenyl ether, etc. Gerare, In use, used as a combination of two or more in the range of the specific HLB.

The oil agent used in the present invention usually has a moisturizing action,
It is preferably one that can be blended into a cosmetic having a lubricating softening action and the like, for example, avocado oil, almond oil,
Oils such as olive oil, coconut oil, castor oil, palm oil, tallow, mink oil; hydrocarbon oils such as liquid paraffin, squalane; isopropyl myristate, isopropyl palmitate, stearyl stearate, cetyl palmitate, octyl palmitate; 2-ethylhexyl stearate, stearyl 2-ethylhexanoate, tri-2-
Examples include ester oils such as glyceryl ethylhexanoate and glycerin tri (caprylic / capric acid), and mixtures thereof.

In the cosmetic of the present invention, the mixture ratio of the nonionic surfactant may be such that the above HLB is obtained, but the total of the mixture of the oil agent, water and the nonionic surfactant is sufficient. It is usually 3 to 15% by mass, preferably 4 to 10% by mass, based on the amount. If the amount is less than 3% by mass, the stability of the product will be poor, and if it exceeds 15% by mass, the oil agent will be excessively solubilized and the emollient effect at the time of use will be undesirably reduced. The mixing ratio of the oil agent is usually 50 to 97% by mass, and preferably 70 to 97% by mass, based on the total amount of the cosmetic. When the amount is less than 50% by mass, the emollient effect decreases, and when the amount exceeds 97% by mass, the sticky feeling becomes severe, which is not preferable. The mixing ratio of the water is usually 0.01 to 10 with respect to the total amount of the cosmetic.
% By mass, preferably 0.01 to 5% by mass. 0.0
If it is less than 1% by mass, the product will not be transparent, and if it exceeds 10% by mass, the product will be cloudy and the stability will be poor.

The cosmetic of the present invention contains, in addition to the above-mentioned nonionic surfactant, oil and water, various safe ingredients which can be usually used within a range not to impair the desired effects of the present invention. Can be combined in an appropriate combination according to the type of For example, components to be added to bath salts, lotions, lotions and the like can be mentioned. Specific examples include, but are not limited to, polyhydric alcohols, anti-inflammatory agents, animal / plant extracts, bactericides, preservatives, cationic surfactants, anionic surfactants, fragrances, and the like. .

The cosmetic of the present invention can be prepared by mixing the above-mentioned essential components so as to contain them. The use of the cosmetic of the present invention can be performed, for example, by charging and mixing the cosmetic of the present invention in water or hot water, forming at least two layers of an oil layer and an oil-in-water emulsion layer, in the same manner as in a usual method. It can be used by using. At this time, the dilution ratio of the cosmetic can be appropriately determined according to the type of the cosmetic, the composition of the cosmetic, and the like. For example, in the case of using as a bath agent, it is preferable in use to design so as to be able to be diluted about 10,000 times.

[0012]

The cosmetic of the present invention comprises two or more specific H
By mixing a mixture of non-ionic surfactants having LB into a cosmetic containing an oil and water and adding the mixture to water or hot water, at least two layers, an oil layer and an oil-in-water emulsion layer, are formed. Therefore, even if the amount of the oil agent used is about the same as that of a conventional cosmetic that is a uniform emulsion, it suppresses the volatilization of the water-soluble moisturizing component, provides an excellent moisturizing effect and the like, and can be retained. . Therefore, it is extremely useful for bath salts, lotions and various lotions.

[0013]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto. Examples 1 and 2 and Comparative Examples 1 and 2 Each component shown in Table 1 was mixed and prepared to produce a bath agent. 20 ml of the obtained bath agent was put into 200 liters of hot water at 40 ° C. and mixed, and various evaluations shown below were performed by a panel of 10 persons. Table 1 shows the results.

<Evaluation of formation of oil layer> The obtained bath agent was poured into hot water, mixed and then visually observed whether or not a uniform oil layer was formed on the surface of the hot water. ◎, with a uniform oil layer formed
Those that were not formed are marked with x. Note that an oil-in-water emulsion layer was formed below the layer where the oil layer was formed. <Evaluation of Moisturizing Effect> After bathing in bath water having an oil layer formed thereon for 5 minutes, the hot water was wiped off with a towel and the moisturizing feeling of the skin after 30 minutes was evaluated. The evaluation was performed on a scale of 1 to 5 having a very excellent moisturizing feeling, and the evaluation was made on a scale of 1 to 5, and the evaluation was made according to the following evaluation criteria by the average score of 10 panels. The average score of 4.0 to 5.0 is represented by ◎, and the average score of 3.0 to 3.0.
9 points, average point 2.0 to 2.9 points Δ, average point 1.0 to
1.9 points were evaluated as x. <Evaluation of feeling of use> After bathing in a bath with an oil layer formed thereon for 5 minutes, the hot water was wiped off with a towel, and the feeling of stickiness of the skin after 30 minutes was evaluated to evaluate the feeling of use. The evaluation was evaluated as 5 points, with no stickiness and very excellent usability.
The evaluation was made on a scale of 5 points, and the evaluation was made according to the same evaluation criteria as the evaluation of the moisturizing effect by the average score of 10 panels.

[0015]

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AB051 AC022 AC352 AC402 AC422 BB04 BB13 CC01 CC04 CC25 DD05 DD23 DD30 DD31 EE05 EE12

Claims (3)

[Claims] 1. A composition comprising two or more nonionic surfactants,
An HLB of a mixture of a nonionic surfactant containing an oil agent and water is 6.5 to 10.5, and the mixture is poured into water or hot water to form an oil layer and an oil-in-water emulsion layer. A cosmetic comprising at least two layers. 2. The cosmetic according to claim 1, wherein the content of the oil agent is 50 to 97% by mass and the content of water is 0.01 to 10% by mass. 3. The cosmetic according to claim 1, wherein the cosmetic is a bath salt, a lotion or a lotion, and contains a bath agent component, a lotion component or a lotion component.