JPH09202898A - Body detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a body detergent which is a liquid detergent excellent in feeling of use such as rinsing when and after washing the body, especially for faces by including a fatty acid soap and a polyoxyethylene alkyl ether sulfate at a specific blending ratio therein. SOLUTION: This body detergent composition comprises 1-30wt.% fatty acid soap and 1-30wt.% polyoxyethylene alkyl ether sulfate at (8:2) to (3:7) weight ratio of the fatty acid soap to the polyoxyethylene alkyl ether sulfate. When a surfactant selected from betaine type amphoteric surfactants or sorbitan- based or polyethylene glycol-based surfactants or both are added to the composition, the irritation is reduced and affords high foam stability and detergency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal cleansing composition containing a fatty acid soap and a polyoxyethylene alkyl ether sulfate, more specifically, a fatty acid soap and a polyoxyethylene alkyl ether sulfate. By containing in a specific blending ratio, rinse during cleaning,
The present invention relates to a liquid cleansing agent having excellent feeling after use such as feeling after washing, particularly a body cleansing agent for face.

[0002]

2. Description of the Related Art Higher fatty acid salts, that is, personal cleansing agents mainly composed of higher fatty acid soaps, have been widely used conventionally, using solid higher fatty acid metal salts. Regarding the shape, solid fatty acid soap was the mainstream. These are excellent in foaming power and detergency, and are suitable as a soap for makeup, but when used for cleaning the face, etc., there is a problem that the feeling after use is inferior such as a feeling of tightness after cleaning. . In addition, polyoxyethylene alkyl ether sulfate, which is an anionic surfactant, is also widely used as a personal cleansing agent because it has characteristics of foaming, excellent washability, and relatively little irritation to the skin. There is. However, a personal cleansing agent containing polyoxyethylene alkyl ether sulfate as a main component is difficult to rinse during washing, and especially when used for washing the face,
There was a problem of feeling slimy after washing.

The inventors of the present invention have made extensive studies on the improvement of such problems, and as a result, by using a fatty acid soap and a polyoxyethylene alkyl ether sulfate in combination at a specific ratio, the feel during and after washing can be improved. It has been found that a personal cleansing composition having an excellent feeling of use and a good feeling of use can be obtained, and in addition to these, an amphoteric surfactant such as a betaine-type amphoteric surfactant, or a surfactant selected from sorbitan-based and polyethylene glycol-based surfactants. When an agent or both of them is added, the effect of lowering irritation, foam stabilizing effect,
It was found that the effect of reinforcing the detergency can be obtained.

[0004]

That is, the present invention provides 1-3
A personal cleansing agent comprising 0% by weight of fatty acid soap and 1-30% by weight of polyoxyethylene alkyl ether sulfate, the weight of the fatty acid soap and the polyoxyethylene alkyl ether sulfate. Ratios from 8: 2 to 3:
The present invention relates to a personal cleansing composition characterized in that the weight ratio of fatty acid soap to polyoxyethylene alkyl ether sulfate is in the range of 8: 2 to 6: 4. . The fatty acid soap is preferably a mixture of lauric acid, myristic acid, palmitic acid, isostearic acid, etc., neutralized with triethanolamine, and polyoxyethylene alkyl ether sulfate is polyoxyethylene. Lauryl ether sulfate is preferred.

The personal cleansing composition of the present invention preferably further contains 0.5 to 20% by weight of an amphoteric surfactant in the total composition. Examples of such amphoteric surfactants include betaine-type amphoteric surfactants. In addition, in all compositions, 0.
It is preferable to contain 1-5% by weight of nonionic surfactant. Examples of such nonionic surfactants include surfactants selected from sorbitan-based and polyethylene glycol-based surfactants. The personal cleansing agent of the present invention can be used in various forms, and in particular, a liquid one is preferable in terms of ease of use and the like. As its application, it is particularly suitable for a facial cleanser.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The fatty acid soap in the present invention refers to an alkali salt of a higher fatty acid, which is a compound represented by the following general formula. (R ¹ COO) _j M ¹ _k (In the formula, R ¹ represents an alkyl group having 6 or more carbon atoms, M represents an alkali group, and j and k each represent an integer of 1 to 3.)

The higher fatty acids in the present invention include caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, lanolin fatty acid, There are linoleic acid, ricinoleic acid, isostearic acid and the like, and these are usually used as a mixture having suitable physical properties. Fats and oils used as raw materials for these higher fatty acids include beef tallow, sheep fat, palm oil, olive oil, castor oil, coconut oil, palm kernel oil, etc. However, the present invention is not limited to these. Sodium salt as the alkali salt,
There are potassium salts, ammonium (NH ₄ ) salts and the like, and ammonium salts are particularly preferable in the present invention. The content of the fatty acid soap is 1-30% by weight in the body wash. If it is less than 1% by weight, sufficient detergency and foaming cannot be obtained. On the other hand, if the amount exceeds 30% by weight, the feeling during washing may deteriorate, the skin irritation may increase, and a liquid body cleanser may cause crystallization at low temperature, which is not preferable.

The polyoxyethylene alkyl ether sulfate salt is a compound represented by the following general formula. [R ² O (CH ₂ CH ₂ O) ₁ SO ₃ ] _m M ² _n (wherein R ² is an alkyl group having 6 or more carbon atoms, M ² is an alkali group, l is an integer of 1 to 30, Both m and n are 1
Represents an integer of 3 to 3. The polyoxyethylene alkyl ether sulfate which is an anionic surfactant is generally obtained by sulfating a polyoxyethylene derivative of higher alcohol and then neutralizing it with an alkali to give an alkali salt. In the invention, the manufacturing method is not limited to this. As the above-mentioned alkali salt, sodium salt, potassium salt, ammonium (NH ₄ )
Examples thereof include salt. Polyoxyethylene alkyl ether sulfates are widely used because they have less irritation to the skin than alkyl ether sulfates.

The content of the polyoxyethylene alkyl ether sulfate is 1 to 30% by weight in the body wash.
If it is less than 1% by weight, sufficient detergency and foaming cannot be obtained. On the other hand, if it exceeds 30% by weight, washing-off may be deteriorated and a slimy feeling may remain even after rinsing, which is not preferable. Examples of polyoxyethylene alkyl ether sulfates include polyoxyethylene octyl ether sulfate, polyoxyethylene lauryl ether sulfate, polyoxyethylene palmityl ether sulfate, and polyoxyethylene stearyl ether sulfate. , Especially polyoxyethylene lauryl ether sulfate such as sodium polyoxyethylene lauryl ether sulfate,
It is preferable because it has an advantage that skin irritation is particularly small. The personal cleansing agent of the present invention is a solid, semi-solid, foam
It can be used in the form of gum, liquid or the like, but liquid is particularly preferable.

It is preferable to add an amphoteric surfactant to the personal cleansing agent of the present invention. As the amphoteric surfactant,
For example, amino acid type, carboxylic acid type such as betaine type,
Each of the amphoteric surfactants such as sulfuric acid ester type, sulfonic acid type and phosphoric acid ester type is included. In the body wash of the present invention, it is particularly preferable to add a betaine-type amphoteric surfactant. As the betaine-type amphoteric surfactant, N-
Examples thereof include alkyl-N-carboxymethylammonium betaine, 2-alkyl-1-hydroxyethylimidazoline betaine sodium, alkyldimethylaminoacetic acid betaine, alkylimidazolinium betaine, and coconut oil fatty acid amide propyl betaine.
Examples of the amphoteric surfactant suitable for the present invention other than the betaine-type amphoteric surfactant include, for example, N-alkylaminoethylglycine such as N-lauryldiaminoethylglycine and N-myristyldiaminoethylglycine, N-alkylβ. -Alanine, N, N, N-trimethylaminopropionic acid, N-hydroxyethyl N, N-dihydroxyethylaminopropionic acid, N-alkyl-N, N-dihydroxyethylaminopropionic acid, N, N, N-trihydroxyethylaminopropionic acid Acid, N-alkyl N, N-dimethylaminopropionic acid, N-alkyl N, N-dihydroxyethylaminoacetic acid, N-alkyl N, N-dimethylaminoacetic acid, N-alkyl N, N-dimethylaminobutyric acid, N-alkyl N, N-dimethylaminopropyl sulfone , N- alkyl and N, N- dimethylamino-2-hydroxy propyl sulfonic acid. These amphoteric surfactants may be used alone or in combination of two or more kinds. The amount of the amphoteric surfactant added is preferably 0.5 to 20% by weight in the body wash. If it is less than 0.5% by weight, the preferable mildness obtained by adding the amphoteric surfactant may not be obtained in some cases. Further, if it exceeds 20% by weight, foaming of the cleaning agent may be deteriorated, which is not preferable.

It is preferable to add a nonionic surfactant to the body wash of the present invention. Examples of nonionic surfactants include sugar fatty acid esters such as sucrose fatty acid ester, maltole fatty acid ester, and lactose fatty acid ester; maltitol fatty acid ester, lactide-
Sugar alcohol fatty acid ester such as fatty acid ester;
Fatty acid polyglycerin ester such as decaglyceryl monolaurate and diglyceryl monostearate; fatty acid monoglyceride such as lauric acid mono- or diethanolamide, myristic acid mono- or diethanolamide; fatty acid monoglyceride and the like are preferable, but sorbitan is particularly preferable. Nonionic surfactants selected from the system and polyethylene glycol systems are preferred. Such suitable sorbitan surfactants include polyoxyethylene coconut oil fatty acid sorbitan, sorbitan sesquioleate, sorbitan trioleate, sorbitan monooleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, and poly Examples thereof include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, and other polyoxyethylene sorbitan fatty acid esters. In particular, polyoxyethylene coconut oil fatty acid sorbitan is suitable.

Suitable polyethylene glycol nonionic surfactants include polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol monolaurate, polyethylene glycol distearate; polyoxyethylene. Examples thereof include polyoxyethylene fatty acid ester such as hydrogenated castor oil, polyoxyethylene polyoxypropylene copolymer, and polyoxyethylene polyoxypropylene fatty acid ester. Polyethylene glycol distearate is particularly preferred. These nonionic surfactants may be used alone or in combination of two or more kinds. The amount of the nonionic surfactant added to the body wash is preferably 0.1 to 5% by weight. If it is less than 0.1% by weight, sufficient foam stabilizing effect and detergency enhancing effect may not be obtained. On the other hand, if it exceeds 5% by weight, the foaming of the entire detergent may be deteriorated.

Various surfactants other than those mentioned above can be appropriately added to the composition of the present invention as long as the effects of the present invention are not impaired. As these surfactants,
Sodium alkyl sulphates such as sodium lauryl sulphate and sodium myristyl sulphate; Sodium N-acyl sarcosinates such as sodium N-lauroyl sarcosinate and sodium N-myristoyl sarcosinate; sodium dodecyl benzene sulphonate, hydrogenated coconut fatty acid monoglyceride monosulfate N-acylglutamates such as sodium, sodium lauroyl sulfoacetate, sodium N-palmitoyl glutamate, sodium N-methyl-N-acyl taurine, N-methyl-N-
Examples thereof include sodium acylalanine, sodium α-olefinsulfonate, sodium dioctylsulfosuccinate, and the like. These surfactants may be added alone or in combination of two or more.

The body cleansing agent of the present invention further contains a thickener, a stabilizer, and a stabilizer, if necessary, within a range that does not impair the effects of the present invention.
Emulsifiers, moisturizers, bactericides, chelating agents, fragrances and the like can be added. Examples of the thickener include electrolytes such as sodium chloride, potassium chloride and sodium sulfate; polyethylene glycol monostearate, fatty acid polyethylene glycol esters such as polyethylene glycol distearate, coconut oil fatty acid diethanolamide, and polyoxyethylene coconut oil fatty acid. Alkyl amides such as monoethanolamide, cellulose derivatives such as methyl cellulose and hydroxyethyl cellulose can be used. These thickeners may be used alone or in combination of two or more.

Stabilizers are used to improve stability at low temperatures, especially in clear body wash products, and may be treated with ethanol.
And alcohols such as propylene glycol, glycerin, sodium benzene sulfonate, sodium xylene sulfonate, and urea. These stabilizers may be used alone or in combination of two or more. Examples of the emulsifying agent include opaque agents such as styrene polymer and polyvinyl acetate, magnesium stearate, ethylene glycol monostearate, ethylene glycol distearate, stearyl alcohol, fish scale foil, titanium mica, bismuth oxychloride. A pearlescent agent such as treated mica can be used. These emulsions may be used alone or in combination of two or more.

Examples of moisturizing agents include higher alcohols such as cetanol and stearyl alcohol, lanolin derivatives, glycerin sorbit, propylene glycol, ethylene glycol, 1,3-butylene glycol, polyethylene glycol. , Polypropylene glycol and the like can be used. These moisturizers may be used alone or in combination of two or more. The bactericide can be blended for the purpose of sterilization, disinfection, deodorization as well as cleaning of the skin, and prevention of dermatitis such as acne, and a part of these can be used as a medicinal component or a preservative.
Examples of the bactericide include cresol such as metacresol and parachlor metacresol; chlorhexidine hydrochloride, isopropylmethylphenol, photosensitizer No. 101, chlorxylenol, trichlorocarbanilide, halocarbane,
It is possible to use phenol, triclosan, phenoxyethanol and the like. These bactericides may be used alone or in combination of two or more.

Chelating agents are often used to improve the clarity of clear liquid personal cleansing agents or to prevent loss of clarity due to the formation of metal soaps. As the chelating agent, ethylenediaminetetraacetic acid derivative, tripolyphosphate, hexametaphosphate, dihydroxyethylglycine, citric acid, tartaric acid, gluconic acid, sugar acid and the like can be used. These chelating agents may be used alone or in combination of two or more. As the fragrance, menthol, anethole, carvone, eugenol, limonene, ocimene, n-decyl alcohol, citronellol, α-terpineol, methyl salicylate, methylacetate, citronellylacetate. , Cineole, linalool, ethyl linalol,
Crocodile, thymol, spearmint oil, peppermint oil, lemon oil, orange oil, sage oil, rosemary
Oils, cinnamon oil, pimento oil, cinnamon leaf oil, perilla oil, wintergreen oil, clove oil, eucalyptus oil and the like can be used alone or in combination.

[0018]

The present invention will be described in more detail with reference to the following examples. Numerical values are based on weight unless otherwise specified.
The sensory evaluation test method and evaluation criteria in this example are as follows. 1. Test Method A test sample was appropriately used by a test subject as a facial cleanser, and the test subject evaluated the foaming at that time and the slimy feeling at the time of rinsing according to the following evaluation criteria, and the average of all test subjects was used as the evaluation result. 2. Evaluation Criteria (1) Foaming during use x: No foaming at all. Δ: Slight foaming is observed. ○: There is foaming. A: There is sufficient foaming.

(2) Feeling of sliminess when rinsing x: Strong feeling of sliminess. Δ: There is a slimy feeling. ◯: A slight slimy feeling remains. ⊚: Substantially no slimy feeling is felt. 3. Comprehensive evaluation Regarding the results of both tests, x: 0, △: 1, ◯: 2, ◎:
It was evaluated as 3, and the sum of the two was taken as a comprehensive evaluation result.

Examples 1 to 3, Comparative Examples 1 and 2 As shown in Table 1 below, fatty acid soaps (fatty acids mainly composed of lauric acid, myristic acid, palmitic acid and isostearic acid neutralized with triethanolamine) ) And sodium polyoxyethylene lauryl ether sulfate in a blending weight ratio of 0:10, 3: 7, 5:
It was adjusted to be 5, 7: 3 and 10: 0.

[0021]

[Table 1]

In the table, the amount of fatty acid soap means the weight of the synthesized fatty acid soap. The total content of fatty acid soap and sodium polyoxyethylene lauryl ether sulfate was kept constant at 23% by weight in the aqueous solution. The method for preparing each sample is shown below. 500ml capacity
154 g of purified water in a glass beaker of 1 was heated to about 70 ° C. in a water bath. Except for Comparative Example 1, fatty acid and triethanolamine in the weight ratios shown in Table 1 were directly added to the glass beaker to prepare fatty acid soap, and then polyoxyethylene lauryl ether sulfate in the ratios shown in Table 1 was prepared. Sodium was added to the above aqueous solution. In Comparative Example 1, 46 g of sodium polyoxyethylene lauryl ether sulfate was added to 154 g of purified water. These aqueous solutions were stirred with a stirring motor until they were uniformly dissolved while cooling, then the stirring was stopped and allowed to stand, and the samples were cooled to room temperature.

Using the above five types of test samples, the test subject 20
A sensory evaluation test was performed on the name. As a result, in "foaming during use", good evaluation was obtained when the blending weight ratio was in the range of 3: 7 to 7: 3. In addition, in the evaluation of "lubricity when rinsing", those having a compounding ratio in the range of 3: 7 to 10: 0 were good, and among them, the evaluation of 7: 3 was ⊚, which was particularly good. . Based on the above evaluations, those with a composition ratio in the range of 3: 7 to 7: 3 are good in both foaming during use and slimy feel during rinsing, and are excellent in usability because they are evaluated comprehensively. I understood.

Examples 4 to 8 As shown in Table 2, the compounding ratio of fatty acid soap and sodium polyoxyethylene lauryl ester sulfate, which was evaluated well in the sensory evaluation test 1 of Table 1, was 3: 7 to 7: 3. The composition ratios of the materials up to the above were examined in more detail. The sample was prepared in the same manner as the sample in Table 1.

[0025]

[Table 2]

The mixing ratio of fatty acid soap and sodium polyoxyethylene lauryl ether sulfate is 4: 6, 5:
Five types of compositions of 5, 6: 4, 7: 3, and 8: 2 were prepared, and a sensory evaluation test was performed on 26 subjects. As a result, in each of the evaluations of “foaming during use” and “feeling of sliminess during rinsing”, all the samples were good, and the overall evaluation was also good for all the samples. Was ⊚, which was particularly good. Examples 9-11, Comparative Examples 3 and 4 A facial cleanser having the composition shown in Table 3 below was prepared according to the following steps. 260 g of purified water was put into a 1 liter glass beaker, heated and mixed at 70 ° C., each component shown in Table 3 was sequentially added thereto, and the mixture was stirred by a stirring motor for 10 minutes or more to be dissolved while cooling. After confirming the uniform dissolution, stirring was stopped, the mixture was allowed to stand, and the mixture was cooled to room temperature.

[0027]

[Table 3]

The sensory evaluation test was carried out on 29 subjects with these five kinds of facial cleansing agents. As a result, in “foaming during use”, the evaluation was good when the compounding ratio was in the range of 0:10 to 7: 3. Also, in the “feeling of sliminess when rinsed”, the evaluation was good when the compounding ratio was 3: 7 to 10: 0, and among them, it was 7: 3.
The sample was ⊚ and was particularly good. Examples 12 to 14 and Comparative Example 5 The composition was described in more detail with a focus on the compounding ratio of fatty acid soap and sodium polyoxyethylene lauryl ether sulfate of 7: 3, which was particularly good in the test results of Table 3 above. To examine the ratio, the blending ratio of fatty acid soap and sodium polyoxyethylene lauryl ether sulfate is
A facial cleanser having the composition set forth in Table 4 below at 6: 4, 7: 3, 8: 2, 9: 1 was prepared in the same manner as the samples used in Table 3.

[0029]

[Table 4]

Regarding the prepared facial cleanser, subject 19
A sensory evaluation test was performed on the name. As a result, in “foaming during use”, the evaluation was good when the compounding ratio was in the range of 6: 4 to 8: 2. Regarding "lubricity during rinsing", all the samples having a mixing ratio of 6: 4 to 9: 1 were good, and among them, those having a mixing ratio of 7: 3 were particularly good in evaluation. As a result of the above, in the comprehensive evaluation,
In the range of 6: 4 to 8: 2, the result was that the usability was good.

Summarizing the experimental results described above, in the personal cleansing agent containing fatty acid soap and sodium polyoxyethylenelauryl ether sulfate, the blending ratio of fatty acid soap and sodium polyoxyethylenelauryl ether sulfate is The body cleansing agent having a ratio of 8: 2 to 3: 7 has an excellent feeling of use such as "foaming when used" and "a slimy feeling when rinsed", and fatty acid soap and polyoxyethylene lauryl ether. The mixing ratio of sodium sulfate is
It has been found that the body cleansing agent in the range of 8: 2 to 6: 4 is particularly excellent in the feeling of use. In addition, the mixing ratio is 7: 3.
In the case of the above, the evaluation of the slimy feeling when rinsed was further favorable.

[0032]

The body cleansing agent of the present invention is 1 to 30% by weight.
Of the fatty acid soap of 1 to 30% by weight of polyoxyethylene alkyl ether sulphate, and the ratio of the weight% was set from 8: 2 to 3: 7, so that foaming during use and rinsing It has an excellent feeling of use represented by the slimy feeling.

Claims (10)

[Claims] 1. A 1 to 30% by weight fatty acid soap and 1
A personal cleansing agent containing -30% by weight of polyoxyethylene alkyl ether sulfate, wherein the weight ratio of the fatty acid soap to the polyoxyethylene alkyl ether sulfate is 8: 2 to 3: 7. A personal cleansing composition, which is 7. 2. The personal cleansing composition according to claim 1, wherein the weight ratio of the fatty acid soap to the polyoxyethylene alkyl ether sulfate is 8: 2 to 6: 4. 3. The personal cleansing agent according to claim 1, wherein the fatty acid soap is obtained by neutralizing a mixture containing lauric acid, myristic acid, palmitic acid, and isostearic acid as main components with triethanolamine. Composition. 4. The personal cleansing composition according to any one of claims 1 to 3, wherein the polyoxyethylene alkyl ether sulfate is polyoxyethylene lauryl ether sulfate. 5. The composition further comprises 0.5-20% by weight.
2. An amphoteric surfactant according to claim 1 contained therein.
The personal cleansing composition according to any one of items 1 to 4. 6. The personal cleansing composition according to claim 5, wherein the amphoteric surfactant is a betaine-type amphoteric surfactant. 7. The personal cleansing composition according to claim 1, further comprising 0.1-5% by weight of a nonionic surfactant in the entire composition. . 8. The personal cleansing composition according to claim 7, wherein the nonionic surfactant is a sorbitan-based surfactant and a polyethylene glycol-based surfactant. 9. The personal cleansing composition according to any one of claims 1 to 8, which is liquid. 10. The personal cleansing composition according to any one of claims 1 to 9, which is a facial cleanser.