JP2001172168A - Method for cleansing skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cleansing the skin which can give a sufficient cleansing power, a refreshing feeling on cleansing, and good moisture to a cleansed skin, and does not give a burning touch to the skin. SOLUTION: This method for cleansing skin, comprising coating a composition comprising the following components (A), (B) and (C): (A) 0.1 to 7 wt.% of an anionic surfactant, (B) 20 to 65 wt.% of a polyol, and (C) 10 to 50 wt.% of water, on the skin without foaming, and then washing out the coated composition with water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning skin which has a sufficient detergency, can be moisturized after washing, and has no hot flash during massage.

[0002]

2. Description of the Related Art Conventionally, anionic surfactants such as alkyl sulfates and sulfonates have been widely used as main components in skin cleansing compositions by utilizing their high foaming properties. I have. However, in a detergent used by whipping, although a refreshing feel can be obtained after washing,
There are drawbacks such as a feeling of tightness of the skin and a poor moist feeling.

On the other hand, for the purpose of suppressing skin irritation caused by an anionic surfactant, a humectant such as a polyhydric alcohol is added to a detergent base mainly composed of an anionic surfactant.
Detergent containing 5 to 70% by weight (JP-A-58-1257)
No. 97 gazette) has been proposed.

However, when a large amount of the humectant is added, the washing effect, the foaming power, the elongation at the time of application are reduced, the hot flash at the time of massage is generated, and the usability is reduced. In addition, it is easily affected by temperature and pH, has a problem in stability, and is apt to be restricted in formulation. Also, in this detergent, a relatively large amount of an anionic surfactant was blended, and moist and moisturized skin after washing was not obtained.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for cleaning skin which is excellent in detergency, can be moistened after washing, and has no hot flash during massage. It is in.

[0006]

Means for Solving the Problems The present inventors have studied not only the formulation of the cleaning agent but also the cleaning method and found that a small amount of an anionic surfactant, a large amount of a polyol and water were combined. It has been found that if the composition is applied to the skin without lathering and then washed off with water, sufficient detergency can be obtained and the washed skin can be moist and moist.

That is, the present invention provides the following component (A):
(B) and (C): A composition containing (A) anionic surfactant 0.1 to 7% by weight, (B) polyols 20 to 65% by weight, (C) water 10 to 50% by weight, An object of the present invention is to provide a method for cleaning the skin, which is applied to the skin without foaming and then washed away with water.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The skin cleaning method of the present invention is characterized by a combination of a composition to be used (hereinafter, sometimes referred to as a detergent composition) and a cleaning method. First, the composition will be described.

The (A) anionic surfactant used in the detergent composition includes higher fatty acid salts, alkyl sulfate salts, polyoxyethylene alkyl ether sulfate salts, N-acyl taurine salts, phosphate ester salts, and the like. N-acyl amino acid salts, N-acyl-N-carboxyethyl glycine salts, N-alkylamide alkanol sulfates, acyl isethionates, alkylbenzene sulfonates and the like. Among them, the following (i) to (vi
Those shown in ii) are preferred.

(I) N-acyl-N-carboxyethylglycine salt. For example, the following general formula (1)

[0011]

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(Wherein, R ¹ represents a linear or branched alkyl, alkenyl or hydroxyalkyl group having 7 to 21 carbon atoms; M ¹ and M ² are the same or different and each represents a hydrogen atom, an alkali metal, an alkali Earth metal, basic amino acid, ammonium, alkanolamine having 1 to 3 alkanol groups having 2 or 3 carbon atoms) or a salt thereof.
Lauroyl-N-carboxyethylglycine sodium salt and N-lauroyl-N-carboxyethylglycine arginine salt are preferred.

(Ii) N-acyl-β-amino acid salts. For example, the following general formula (2)

[0014]

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(Wherein R ² represents a straight-chain or branched-chain alkyl or alkenyl group having 7 to 21 carbon atoms, and M ¹ is the same as described above). Salts are mentioned, and among these, N-lauroyl-β-alanine arginine, N-lauroyl-β-alanine potassium, and N-lauroyl-β-alanine sodium are preferable.

(Iii) N-acyl-α-amino acid salts. For example, the following general formula (3)

[0017]

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[0018] (wherein, R ³ represents a linear or branched alkyl or alkenyl group of 7 to 21 carbon atoms, M ¹ and M
² is the same as above. And N-acylglutamic acid or a salt thereof, of which sodium N-lauroylglutamate is preferred.

(Iv) N-acyl taurine salts. For example, the following general formula (4)

[0020]

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Wherein R ⁴ is a linear or branched alkyl or alkenyl group having 7 to 21 carbon atoms, and R ⁵ is a hydrogen atom or an alkyl group which may have a hydroxyl group having 1 to 4 carbon atoms. And M ¹ and M ² are the same as described above.)
-Acyl taurines or salts thereof, of which
N-lauroyl-N-methyltaurine sodium, N-
Cocoyl-N-methyltaurine sodium is preferred.

(V) N-alkylamide alkanol sulfates. For example, the following general formula (5)

[0023]

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(Wherein, R ⁶ represents a linear or branched alkyl or alkenyl group having 6 to 22 carbon atoms, and R ⁷ represents a linear or branched alkyl or alkenyl group having 1 to 22 carbon atoms or hydrogen) R ⁸ represents a linear or branched alkylene group having 1 to 5 carbon atoms, R ⁹ O represents an oxyalkylene group having 2 to 3 carbon atoms, and p represents an arbitrary number of 0 to 20. And n n R ⁹ Os may be the same or different).

(Vi) Phosphate salt. For example, the following general formulas (6) and (7)

[0026]

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Where R^Ten, R¹¹And R¹²Has 8 or more carbon atoms
Represents 22 linear or branched alkyl or alkenyl groups
And l, m and n each represent an average number of moles of 0 to 10.
Then M ¹And M^TwoIs the same as above. Phosphoric acid represented by)
Steal salts, of which potassium lauryl phosphate
Arginine myristyl phosphate, 2-hexyldecyl
Arginine phosphate is preferred.

(Vii) Acyl isethionate. For example, the following general formula (8)

[0029]

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(Wherein R ¹³ represents a straight-chain or branched-chain alkyl, alkenyl or hydroxyalkyl group having 7 to ²¹ carbon atoms, and M ¹ is the same as described above). Of these, sodium lauroylisethionate and sodium cocoylisethionate are preferred.

(Viii) Higher fatty acid salts For example, the following general formula (9)

[0032]

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(Wherein, R ¹⁴ represents a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms, and M ¹ is the same as described above). Salts of single fatty acids such as lauric acid, myristic acid and stearic acid and salts of mixed fatty acids such as coconut oil fatty acids and tallow fatty acids are preferred.

The anionic surfactant of the component (A) comprises 1
More than one kind can be used, and 0.1 to
7% by weight (hereinafter simply indicated as%), particularly 0.5% to 6%
Mixing is preferable because sufficient detergency, usability at the time of application and moist moisture after washing can be obtained, and elongation at the time of application becomes better.

The polyols of the component (B) used in the present invention include, for example, propylene glycol, isoprene glycol, 1,2-pentanediol, 1,3-propylene glycol, 1,3-butylene glycol, glycerin, sorbitol, Polyethylene glycol having a molecular weight of 400, polyethylene glycol having a molecular weight of 600,
Polyhydric alcohols such as dipropylene glycol, diglycerin, and hexylene glycol; sugar alcohols such as maltitol, xylitol, glucose, sucrose, and polyoxyalkylenealkylglycoside derivatives.

Glycerin, isoprene glycol,
Polyethylene glycol, dipropylene glycol, 1,3-butylene glycol, sorbitol, and polyoxyalkylene alkyl glucoside having a molecular weight of 400 are preferred.

One or more polyols of the component (B) can be used. When the polyol is incorporated in the detergent composition at 20 to 65%, and more preferably at 30 to 60%, it gives moisturized moisture to the skin after washing. At the same time, the cleaning composition is preferably stretched at the time of application and has no hot flash at the time of massage.

The weight ratio of the components (A) and (B) is
From the viewpoint of elongation during coating and prevention of hot flash during use, (A) / (B) is preferably 1/3 to 1/200, more preferably 1/12 to 1/200.

The detergent composition used in the present invention is used from the viewpoint of imparting a feeling of use at the time of application and a moist feeling of the skin after washing.
It is preferred to incorporate 10 to 50%, especially 15 to 45% water.

In the cleaning composition used in the present invention, in addition to the above-mentioned anionic surfactants, other surfactants such as carbobetaine type, sulfobetaine type, imidazolinium betaine type, amidobetaine type Amphoteric surfactants such as amine oxides, monoglycerides, sorbitan fatty acid esters, alkyl saccharides, polyoxyalkylene alkyl ethers, higher fatty acid alkanolamides, silicones and other nonionic surfactants as required Can be added.

One or more of these amphoteric surfactants and nonionic surfactants can be used, and when the detergent composition contains 0.1 to 30%, especially 1 to 15% in total, foaming is achieved. It is preferable because the power and the cleaning effect are improved.

The detergent composition used in the present invention may further contain, if necessary, components used in ordinary detergent compositions, bactericides such as triclosan, anti-inflammatory agents such as tocopherol acetate, and preservatives such as methylparaben. , Chelating agents, citric acid, pH adjusting agents such as succinic acid, salts such as sodium chloride,
In addition, a pearlizing agent, a fragrance, a pigment, an ultraviolet absorber, a viscosity modifier, an antioxidant, a plant extract, an alcohol, a humectant such as trimethylglycine, and the like can be blended as long as the effects of the present invention are not impaired. However, it is preferable that the oil content is 1% or less, particularly substantially no oil, from the viewpoint of preventing stickiness and preventing the detergency from decreasing.

The cleaning composition used in the present invention contains 20
The pH of the aqueous solution when diluted by weight is 4 to 8, especially 5 to 5.
8 is preferred. In order to obtain a preferable pH, it may be adjusted by adding an acid or an alkali to the detergent composition.

In the present invention, the above-mentioned detergent composition is applied to the skin without foaming, and then the skin is washed by rinsing with water. Conventional detergents (such as facial cleansers) are diluted with water in advance and used after bubbling, so that they are usually diluted 5 to 10 times. Therefore, even when the detergent composition contains, for example, 25 to 70% of polyols, it is diluted to a concentration of several to ten to several percent when applied on the skin. In the present invention, the first characteristic feature is that a higher concentration of polyols is applied on the skin. As a result, a high moisturizing effect, that is, a moisturizing effect is imparted to the washed skin. On the other hand, in the present invention, the amount of the surfactant that performs the function of removing stains is smaller than that of a normal cleaning composition, but is applied to the skin without being diluted with water in advance and allowed to blend in. Thereby, a sufficient cleaning action can be exhibited. Thereafter, when rinsing with a large amount of water, dirt can be removed with suitable bubbling, and excess polyols can be washed away. In the present invention, a second feature is that a composition containing a small amount of an anionic surfactant is applied directly on the skin. Thus, the feeling of use during application and the feeling of freshness after rinsing are good, and there is no feeling of tightness. On the other hand, when water is added and foamed before application to the skin, there is a sense of tightness of the skin, and the washed skin becomes dry and rough. In addition, in the composition used in the present invention, the amount ratio of the polyols and water is also adjusted in a suitable range, so that it is possible to suppress the hot flash when blending into the skin and massaging.

The application of the detergent composition to the skin is preferably carried out, for example, by taking an appropriate amount of the composition with the hand, spreading it with the palm of the hand, and applying it to the skin. After application, apply to skin,
After massage if necessary, rinse with water.

The washing site is not particularly limited as long as it is the skin.
The whole body, hands and face may be used, but the face is more preferable. That is, the method of the present invention is particularly preferably a face washing method.

[0047]

EXAMPLES Example 1 A cleaning composition having the composition shown in Table 1 was produced by a conventional method.
Take an appropriate amount of each composition in your hands, spread with your palms and apply to your face,
After massage and rubbing on face, it was rinsed off with water. The feeling of hot flashes, the feeling of use during massage, the feeling of tightness after washing and the condition of the skin were evaluated. The results are shown in Table 1.

(1) Hot flash during massage: 20-3
The hot flash feeling during massage when the whole face was massaged for 60 seconds as described above without lathering using 2 g of each cleaning composition by a panel of 10 Japanese women in their 0s was as follows. The sensory evaluation was performed according to the following criteria. The average score of the 10 subjects was indicated by を for 2.5 to 3.0, Δ for 1.5 to 2.4, and x for 1.0 to 1.4. Not worried Score 3 Slightly hot flashes Score 2 Very hot flashes Score 1

(2) Feeling of use and tightness: 20 to 30
Using a panel of 10 Japanese women of the age, using 2 g of each detergent composition, the whole face was massaged for 60 seconds as described above without lathering, and the feeling after use and the feeling of tightness after washing were as follows. Sensory evaluation was performed based on criteria. The average score of 10 people is 2.5 to 3.0: ○, 1.5 to 2.4: △,
1.0 to 1.4 were indicated as x. (I) Feeling of use; Refreshing Score 3 Slight feeling of residual skin Score 2 Feeling of remaining skin Skin Score 1 (ii) Feeling tight; Not firm Score 3 Slightly smooth Score 2 Firming Score 1

(3) Skin condition: A panel of 10 Japanese women in their 20s and 30s used 1 g of each cleaning composition to massage the entire face for 60 seconds without lathering as described above. The condition of the skin after continuous use twice a day for two weeks was visually evaluated according to the following criteria. ○, the average score of 10 people is 2.5-3.0.
1.5 to 2.4 are indicated by Δ, and 1.0 to 1.4 are indicated by x. Well-scored Score 3 Slight desquamation Score 2 Clear desquamation Score 1

[0051]

[Table 1]

As is clear from Table 1, (A) 0.1 to 7% of anionic surfactant, (B) polyols 20 to
When the composition containing 65% and 10 to 50% of water is applied to the skin without lathering, and then washed by rinsing with water, there is no hot flash during massage and use during washing. It shows that the feeling (freshness) is good, there is no feeling of tightness, and the texture of the skin after washing is well-organized and moist. In contrast, when component (A) is small (comparative product 1), when component (A) is too large (comparative product 2), when component (C) is too large (comparative product 3), and component (B) Was too large (Comparative product 4), one of these evaluations was inferior.

Comparative Example 1 1 g or 2 g of the detergent composition of the product 2 of the present invention shown in Table 1 was picked up, added with 5 mL or 10 mL of water, lathered, applied to the entire face and massaged for 60 seconds. The face was washed off with water. As a result of performing the same evaluation as in Example 1, although there was no hot flash during the massage, the feeling of use (freshness) was not sufficient, there was also a sense of tightness, and the skin condition after washing was dry. There was clearly desquamation.

[0054]

According to the method for cleaning the skin of the present invention, sufficient detergency can be obtained, a refreshing feeling can be obtained at the time of cleaning, and no moist feeling can be given, so that moisturized moisture can be given to the washed skin. .

Continuing from the front page (72) Inventor Ichiro Sugai 2-1-3 Bunka, Sumida-ku, Tokyo F-term in the laboratory of Kao Corporation 3B201 AA46 BB92 BB94 CC21 4C083 AB051 AC111 AC111 AC122 AC132 AC242 AC402 AC442 AC582 AC662 AC712 AC902 AD042 BB05 CC02 CC23 DD23 DD27 EE03 EE07 4H003 AB08 AB31 AB38 AB44 AB46 AC03 AD04 BA12 DA02 DC01 EB04 EB05 EB13 EB36 ED02 ED28 FA21 FA33

Claims (2)

[Claims] 1. The following components (A), (B) and (C): (A) 0.1 to 7% by weight of anionic surfactant (B) 20 to 65% by weight of polyols (C) Water A method for washing a skin, comprising applying a composition containing 10 to 50% by weight to the skin without lathering, and then rinsing with water. 2. The washing method according to claim 1, which is a face washing method.