JP2001072573A - Cosmetic for face washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safer cosmetic for cleaning capable of controlling inflammation without damaging cleaning power. SOLUTION: This cosmetic for cleaning contains soap as the cleaning agent, characterized by its fatty acids and composition of fatty acids that constitute the soap, with stearic acid/lauric acid wt. ratio set at 0.8 to 1.4, and carboxymethyl cellulose and/or its salt contained at 0.2 to 1 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facial cleansing cosmetic suitable for use by people with sensitive skin.

[0002]

2. Description of the Related Art Women have the custom of washing their face several times a day in order to make up their makeup, etc. Must be used. This type of facial cleanser was developed using a cream-like detergent that uses a potassium soap of a fatty acid to adjust to a cream, add water to the foam when used, and use this foam to wash. is there. Such a cleaning agent is obtained by increasing the content of potassium laurate having high foaming power among fatty acid soaps. By washing with foam, there is an advantage that sebum remains in an appropriate amount and seizure is not excessive even if the washing is repeated many times, as compared with the conventional method of rubbing and washing the solid soap itself. However, primary irritancy of lauric acid or laurate to the skin is high, and in a person with sensitive skin, inflammation may be caused by stimulation of lauric acid or laurate remaining in a trace amount. When the content of this lauric acid or laurate is reduced, the foaming property is reduced, and it becomes difficult to wash with foam. Although suppression of stimulus expression caused by lauric acids is desired, It has not been achieved yet. In other words, development of such a highly safe cleaning cosmetic that suppresses the occurrence of such inflammation without impairing the detergency has been awaited.

[0003] On the other hand, carboxymethylcellulose is a thickener generally used in cosmetics, and has a high ratio of stearic acid to lauric acid in the fatty acid composition of fatty acids and soaps. It has not been practiced to incorporate salt into a facial cleanser that uses a salt as a detergent, and therefore, such a cosmetic for cleaning has low irritation to a person with sensitive skin while maintaining detergency. Nothing was known at all.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made under such circumstances, and provides a highly safe cleaning cosmetic which suppresses the occurrence of inflammation without impairing the detergency. The task is to

[0005]

SUMMARY OF THE INVENTION In view of such circumstances, the present inventors have intensively studied a cosmetic composition for cleaning which has excellent detergency, suppresses inflammation, and is safer. As a result of repeated efforts, the weight ratio of stearic acid to lauric acid in the fatty acid composition of the fatty acids and the fatty acids constituting the soap was 0.8 to 1.4, and carboxymethylcellulose and / or a salt thereof was 0.2 to 0.2%. The present inventors have found that by containing 1% by weight as a component of a cosmetic for cleaning, it has been found that a desired cosmetic for cleaning can be obtained, and have completed the invention. That is, in the present invention, in the fatty acid composition of the fatty acid and the fatty acid constituting the soap, the weight ratio of stearic acid to lauric acid is 0.8 to 1.4, and carboxymethylcellulose and / or a salt thereof is 0.2%. It is intended to provide a cosmetic for cleaning, characterized by containing 〜1% by weight.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION (1) Fatty acid composition which is an essential component of the cleansing cosmetic composition of the present invention: The cleansing composition of the present invention comprises a fatty acid composition of a fatty acid and a fatty acid constituting a soap. It is essential that the weight ratio to the acid is 0.8 to 1.4, more preferably 0.9 to 1.1. In other words, this means that stearic acid is contained as much as fatty acid and soap as a constituent fatty acid to the same extent as lauric acid. In normal cleaning products, lauric acid soap has extremely good foaming and is excellent in cleaning action, so the composition of fatty acids and constituent fatty acids of the soap is as follows:
It takes a form containing a large amount of lauric acid, in other words, a form using a mixed fatty acid having a composition in which the ratio of stearic acid is suppressed to a weight ratio of stearic acid to lauric acid of about 0.2 to 0.5. This is a setting in consideration of the fact that if the amount of stearic acid is small, the possibility of stimulus expression by lauric acid increases, and that if the amount of stearic acid is excessively increased, the cleaning properties deteriorate. However, in such a numerical range, according to the investigation by the present inventors, for a person with sensitive skin such as a patient with atopic dermatitis, lauric acid and / or lauric acid and / or lauric acid may be contained in such a range. It is known that skin troubles such as inflammation due to salt appear. The present inventors have found that the weight ratio of stearic acid to lauric acid is 0.8 or more, more preferably 0.9%.
By doing as described above, it has been found that such stimulus expression can be suppressed. Further, from the viewpoint of detergency, the reduction in detergency due to replacement of lauric acid with stearic acid is caused by the weight ratio of stearic acid to lauric acid being 1.4.
It has been found that by controlling to be not more than 1.1, more preferably not more than 1.1, it can be maintained by adding carboxymethylcellulose described below.
That is, the weight ratio of stearic acid to lauric acid is 0.8 in the fatty acid and the fatty acid constituting the soap.
It has been found that it is essential for the cleaning agent of the present invention to have a composition requirement of from 1.4 to 1.4, more preferably from 0.9 to 1.1. Other requirements for the fatty acid and the soap include its content and neutralization ratio, which may be in accordance with the conditions of ordinary cosmetics for washing according to the type of preparation. Such conditions include that the content of stearic acid and / or a salt thereof is 7 to 20% by weight, more preferably 9 to 18% by weight. Furthermore, in the fatty acids and the constituent fatty acids of the soap, in addition to lauric acid and stearic acid, fatty acids such as myristic acid, palmitic acid, oleic acid, and linoleic acid are weight ratio to the sum of the contents of lauric acid and stearic acid. At 0.4
, More preferably 0.5 to 0.7 as a condition. This is because the softness of the foam can be obtained in such a range. Preferred conditions for the neutralization ratio are 50 to 90%, more preferably 60 to 80%.
% By weight. This is because, in this range, the production of spots, which may be observed in low-temperature storage, is suppressed.

(2) Carboxymethylcellulose which is an essential component of the cleansing cosmetic composition of the present invention As described above, the cleansing cosmetic composition of the present invention has a detergency caused by an increase in the amount of stearic acid, in other words, In order to maintain the strength of the foam and the good foaming, it is essential to contain carboxymethylcellulose and / or a salt. By containing this, the foaming is improved, and the standing foam is hard to disappear. Accordingly, the washing cosmetic composition of the present invention exhibits an excellent washing effect even when a washing agent is used together with water with the palm of the hand to lather and the face is washed with the lather. Here, as the salt, those which are physiologically acceptable and can form a salt with a carboxyl group can be used without any particular limitation, for example, an alkali metal such as sodium or potassium. Examples thereof include salts, alkali metal salts such as calcium and magnesium, ammonium salts, organic amine salts, and basic amino acid salts. Of these, alkali metal salts are particularly preferred, and sodium salts are particularly preferred. The preferred content of carboxymethylcellulose and / or salt in the cosmetic for washing of the present invention is 0.1 to 1% by weight, more preferably 0.2 to 1% by weight.
0.5% by weight. If the amount is too small, the effect of maintaining the detergency may not be exhibited, and if the amount is too large, the feeling of use may decrease due to viscosity.

(3) Cosmetic composition for cleaning of the present invention If the cosmetic composition for cleaning of the present invention satisfies the above-mentioned essential components and components, the cosmetic composition for cleaning is usually provided within the range not impairing the effects of the present invention. Any component used in such cosmetics can be contained. Such optional components include, for example, hydrocarbons such as squalane, petrolatum, microcrystalline wax, jojoba oil, carnauba wax,
Esters such as octyldodecyl oleate, triglycerides such as olive oil, tallow, coconut oil, fatty acids such as stearic acid, oleic acid and ritinoleic acid, higher alcohols such as oleyl alcohol, stearyl alcohol and octyldodecanol, sulfosuccinate esters and the like. Anionic surfactants such as sodium polyoxyethylene alkyl sulfate, amphoteric surfactants such as alkyl betaine salts, cationic surfactants such as dialkylammonium salts, sorbitan fatty acid esters, fatty acid monoglycerides, and polyoxyethylene adducts thereof , Nonionic surfactants such as polyoxyethylene alkyl ethers and polyoxyethylene fatty acid esters, polyhydric alcohols such as polyethylene glycol, glycerin and 1,3-butanediol, thickening Gelling agents, antioxidants, ultraviolet absorbers, may contain coloring material, preservatives, powders, an active ingredient such as anti-inflammatory agents and vitamins. Of these, particularly preferred are components having an anti-inflammatory effect. Examples of such components include dipotassium glycyrrhizinate, glycyrrhizic acid-related substances such as stearyl glycyrrhetinate, burdock extract and birch extract. Examples of anti-inflammatory crude drug extracts and the like can be mentioned. By containing these anti-inflammatory components, it is possible to prevent inflammation from occurring due to physical stimulation such as washing operation or temperature stimulation by cold water, and it is possible to further enhance the effect of the cleaning cosmetic of the present invention. it can. The content of these anti-inflammatory components is
0.01-0.5% by weight is preferred. The cleansing cosmetic composition of the present invention can be produced by treating these essential substances and optional substances in a conventional manner. In the cosmetic for washing of the present invention, the cosmetic for washing is a cosmetic composition used for the purpose of washing by washing with water, and is an anionic interface such as soap or a salt of an alkyl sulfate. It refers to those containing a surfactant, an amphoteric surfactant or the like as a cleaning component. Among these dosage forms irrespective of properties such as solid, creamy or liquid, it is particularly preferable as the cosmetic for cleaning of the present invention. Things are creamy,
The method of use is as described above, in which the palm is foamed with water and the foam is used for washing. this is,
This is because such a washing method produces less stimulus.
Further, the cosmetic for cleaning of the present invention is particularly preferably used for people with sensitive skin, but there is no disadvantage even when used by people with ordinary skin, and such ordinary skin is used. Such cases also belong to the technical scope of the present invention.

[0009]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited only to these Examples.

Example 1 A cosmetic for cleaning was prepared according to the following formulation. That is, the ingredients were heated and stirred at 80 ° C. The mixture was stirred and cooled to obtain a cosmetic (cream) for washing. Hydrogenated soybean lecithin 0.4 part by weight Glycosphingolipid 0.1 part by weight Soybean protein 0.1 part by weight Burdock extract 0.1 part by weight Ethanol 1 part by weight Polyethylene glycol 1.8 part by weight Polyoxyethylene polyoxypropylene glycerin 1 0.8 parts by weight Glycerin 16 parts by weight Cholesterol 0.4 parts by weight Behenyl alcohol 0.7 parts by weight Potassium hydroxide 8.1 parts by weight Coconut oil fatty acid sucrose ester 1.3 parts by weight Stearic acid 12 parts by weight Palmitic acid 10 parts by weight Myristic acid 5 parts by weight Lauric acid 12 parts by weight Linoleic acid 2 parts by weight Sodium carboxymethyl cellulose 0.4 parts by weight Water 27.2 parts by weight Weight ratio of stearic acid to lauric acid: 1

<Example 2> Using the cosmetic for cleaning of the present invention of Example 1, a use test was conducted using a person with sensitive skin as a panelist. As Comparative Example 1, the carboxymethylcellulose of Example 1 was replaced with water, and as Comparative Example 2, the stearic acid of Example 1 was completely replaced with lauric acid. The use test was performed by 10 persons per group, and the above Example 1, Comparative Example 1, and Comparative Example 2 were respectively assigned. The period was three weeks, and the face was always washed twice a day.
After the use test, the presence or absence of irritation was investigated by a questionnaire. As a result, while the number of stimulants in the use group of Example 1 was 0, the number was 2 in Comparative Example 1 and 8 in Comparative Example 2. This indicates that the cosmetic for cleaning of the present invention has suppressed irritation. In addition, it can be seen that the cause of the stimulus expression is lauric acid. Further, the cleaning properties of these cleaning materials were evaluated on the basis of ++: very good, +: good, ±: slightly good,-: not good. As a result, Example 1 is ++ 4 cases and +6 cases,
Comparative Example 1 was +1 case, ± 8 cases, -1 case, and Comparative Example 2 was ++ 5 cases, +5 cases. This shows that the cosmetic for cleaning of the present invention also maintains the detergency.

Example 3 A cosmetic for cleaning was prepared according to the following formulation. That is, the ingredients were heated and stirred at 80 ° C. The mixture was stirred and cooled to obtain a cosmetic (cream) for washing. About this thing, 1
Examination of Example 1 as a control for irritation by continuous washing for 0 times showed clearly low irritation. This indicates that the cleansing cosmetic composition of the present invention preferably contains an anti-inflammatory component. Hydrogenated soybean lecithin 0.4 part by weight Glycosphingolipid 0.1 part by weight Soybean protein 0.1 part by weight Burdock extract 0.1 part by weight Ethanol 1 part by weight Burdock extract 0.1 part by weight Dipotassium glycyrrhizinate 0.1 part by weight Polyethylene glycol 1.8 parts by weight Polyoxyethylene polyoxypropylene glycerin 1.8 parts by weight Glycerin 16 parts by weight Cholesterol 0.4 parts by weight Behenyl alcohol 0.7 parts by weight Potassium hydroxide 8.1 parts by weight Coconut oil fatty acid sucrose ester 1. 3 parts by weight Stearic acid 12 parts by weight Palmitic acid 10 parts by weight Myristic acid 5 parts by weight Lauric acid 12 parts by weight Linoleic acid 2 parts by weight Sodium carboxymethylcellulose 0.4 part by weight Water 27 parts by weight Weight ratio of stearic acid to lauric acid: 1

Example 4 A cosmetic for cleaning was prepared according to the following formulation. That is, the ingredients were heated and stirred at 80 ° C. The mixture was stirred and cooled to obtain a cosmetic (cream) for washing. These were subjected to five consecutive washing tests using a specialized panel of sensitive skin to examine the detergency and irritation.
These evaluation criteria are as follows: ++: very good, +:
Good, ±: slightly good,-: not good, stimulus expression ++: no stimulation, +: almost no stimulation,
±: Stimulated slightly,-: Stimulated clearly. Table 1 shows the results. Accordingly, in the fatty acid composition of the fatty acid and the fatty acid constituting the soap, the weight ratio of stearic acid to lauric acid is preferably 0.8 to 1.4, more preferably 0.9 to 1.1. You can see that there is. Hydrogenated soybean lecithin 0.4 part by weight Glycosphingolipid 0.1 part by weight Soybean protein 0.1 part by weight Burdock extract 0.1 part by weight Ethanol 1 part by weight Polyethylene glycol 1.8 part by weight Polyoxyethylene polyoxypropylene glycerin 1 0.8 parts by weight Glycerin 16 parts by weight Cholesterol 0.4 parts by weight Behenyl alcohol 0.7 parts by weight Potassium hydroxide 8.1 parts by weight Coconut oil fatty acid sucrose ester 1.3 parts by weight Stearic acid * Palmitic acid 10 parts by weight Myristic acid 5 parts by weight Parts Lauric acid * Linoleic acid 2 parts by weight Sodium carboxymethyl cellulose 0.4 parts by weight Water 27.2 parts by weight

[0014]

[Table 1]

[0015]

According to the present invention, it is possible to provide a highly safe cleaning cosmetic which suppresses the occurrence of inflammation without impairing the detergency.

Continuing on the front page F-term (reference) 4C083 AA111 AA112 AB032 AC102 AC122 AC182 AC241 AC242 AC252 AC352 AD042 AD271 AD272 AD392 AD412 AD492 AD531 AD532 AD572 BB51 CC23 DD31 EE06 EE10 EE12 FF05 4H003 AB04 AC03 BA15 DA02 EB04 EB05 EB07 EB05 EB05 EB05 EB05 EB07 EB07 EB05 EB05 EB05 FA42

Claims (6)

[Claims] 1. A cosmetic for facial cleansing, wherein the weight ratio of stearic acid to lauric acid is 0.8 to 1.4 in the fatty acid composition of fatty acids and fatty acids constituting soap, and carboxymethyl cellulose and A facial cleansing cosmetic comprising 0.2 to 1% by weight of a salt thereof. 2. The facial cleansing cosmetic according to claim 1, wherein the content of stearic acid and / or a salt thereof is 7 to 20% by weight. 3. The facial cleansing cosmetic according to claim 1, which is in the form of a cream. 4. The face-washing cosmetic according to claim 1, further comprising an anti-inflammatory component. 5. The cosmetic for facial cleansing according to claim 1, wherein the anti-inflammatory component is dipotassium glycyrrhizinate and / or burdock extract. 6. It is for a person with sensitive skin,
The cosmetic for face washing according to any one of claims 1 to 5.