JPH03153796A - Lowly irritant detergent composition - Google Patents

Abstract

PURPOSE:To obtain a liquid detergent composition lowly irritant to the skin and excellent in foaming ability even under weakly acidic conditions by using a phosphoric ester surface active agent and a specified compound as constituents. CONSTITUTION:The title composition contains a phosphoric ester surface active agent (e.g. sodium polyoxyethylene monolauryl phosphate) and a mono-(fatty acid) ester (salt) of glycerol sulfate (e.g. sodium salt of glycerol monolaurate sulfate).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid detergent composition that has excellent foaming properties in weakly acidic conditions and is mildly irritating to the skin.

Problems to be Solved by the Prior Art and the Invention In recent years, there has been an increasing demand for detergents that are mild to the skin and have a good feel when used, and highly safe surfactants are being reconsidered.

Among the existing surfactants, phosphate ester surfactants have been reviewed for their low irritation to the skin and have recently begun to be used as cleaning agents, but they have the disadvantage of weak foaming power in mildly acidic conditions. was there.

When a nonionic surfactant is blended with a phosphate ester surfactant to compensate for this drawback, the foaming power is not improved, although it is less irritating to the skin.

Therefore, a product in which N-acylglutamate, which is a type of anionic surfactant, is blended with a phosphate ester surfactant has appeared (Japanese Patent Publication No. 60-9555).

However, in this case, the irritation to the skin was not sufficient.

Means for Solving the Problems In order to solve the above problems, the present inventors have intensively studied combinations of phosphate ester surfactants and various anionic surfactants. As a result, by incorporating glyceryl sulfate monofatty acid ester or its salt into a phosphate ester surfactant, which has traditionally been used as a solid detergent because it is difficult to make into a liquid, it has excellent foaming properties and is gentle on the skin. The inventors have discovered that it is possible to obtain a liquid detergent composition that is hypoallergenic, and have completed the present invention.

That is, the present invention is a liquid cleaning composition characterized by containing a phosphate ester surfactant and a glyceryl sulfate monofatty acid ester or a salt thereof.

In the present invention, glyceryl sulfate monofatty acid ester is an ester of glyceryl sulfate and a saturated or unsaturated fatty acid having 6 to 18 carbon atoms, such as caprylic acid, capric acid, lauric acid, myristic acid, and valmitic acid. Salts include alkali metal (e.g. sodium, potassium, etc.) salts, ammonium salts, alkanolamine salts having 2 or 3 carbon atoms, arginine salts, lysine salts, etc. be.

The non-acid ester surfactant refers to a monoester or diester of polyoxyethylene alkyl phosphoric acid, including salts thereof, and the alkyl group moiety thereof is a hydrocarbon having 8 to 1B carbon atoms, such as a caprylic group. , capric group, lauryl group, myristyl group, stearyl group, etc. Further, the number of oxyethylene added is 1 to 20. Salts include alkali metal salts, ammonium salts, alkanolamine salts having 2 or 3 carbon atoms, arginine salts, lysine salts, and the like.

The blending amount of the above components is 2.5 to 30% by weight, preferably 5 to 20% by weight of glyceryl sulfate monofatty acid ester salt.
and the phosphate ester surfactant is 5 to 40% by weight.
, preferably 10 to 30% by weight.

However, the blending ratio of phosphate ester surfactant and glyceryl sulfate monofatty acid ester or its salt is 1:4 to 4:
1, preferably 1:1 to 3:1.

The cleaning composition of the present invention is prepared so that the pH of the 5 to 10% by weight aqueous solution thereof is 5.5 to 7.0, preferably 5.8 to 6.8. pH5.0 or less, or pH
If it is 9.0 or more, it is not suitable for use because it causes strong skin irritation.

In addition to the above-mentioned essential components, the cleaning composition of the present invention may optionally contain higher fatty acid metal salts such as magnesium stearate and calcium stearate.

Anionic surfactants such as N-acyl amino acid salts (such as potassium lauroyl sarcosine), N-acyl taurine salts, boxyethylene alkyl ether carboxylates or sulfates, alkyl carboxylates, polyoxyethylene hydrogenated castor oil, Nonionic surfactants such as oxyethylene rubitan fatty acid ester and polyglycerin fatty acid ester, polyether-modified silicone,
Silicon derivatives such as epoxy-modified silicone and alcohol-modified silicone, amphoteric surfactants such as imidazolinium betaine and lauryldimethylamine acetate betaine, quaternary nitrogen-containing cellulose, polyvinylpyrrolidone,
Cationic water-soluble polymers such as chitosan; Dissolving agents such as propylene glycol, glycerin, 1,3-butylene gelifol, ethanol, and urea; inorganic salts; higher alcohols; Viscosity modifier, citric acid, lactic acid, phosphoric acid,
pH adjusters such as sodium bicarbonate, sodium carbonate, potassium bicarbonate, sodium hydroxide, potassium hydroxide, glycyrrhetinic acid, dipotassium glycyrrhizinate,
Anti-inflammatory agents such as stearyl glycyrrhetinate, azulene, berberine chloride, shikonin, fungicides such as triclosan, trichlorocarbanilide, isopropyl methinophenol, zinc pyrithione, viroctone olamine, vitamin E acetate and trichlorcarbanilide. Anti-dandruff agents such as mixtures, preservatives such as paraben, benzoic acid, oxybenzone, etc. may be added within a range that does not impair the effects of the present invention.

The cleaning composition of the present invention is prepared by dissolving and mixing the respective ingredients, and
It is obtained by adjusting the pH using an H adjuster.

Effects of the Invention According to the present invention, it has become possible to provide a cleansing agent that is mildly irritating to the skin and has good foaming properties.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples and Test Examples.

Example 1 Ingredients Blend amount Polyoxyethylene (1) monolauryl phosphate sodium salt 30% Polyether modified silicone 0.2% Triclosan 0.1% Hydroxymethyl cellulose 0.2% Sodium glyceryl sulfate monocaprate 10% Lactic acid Appropriate amount Water
Total 100%
Components other than lactic acid are dissolved and mixed, and then the pH is adjusted to 5 with lactic acid.
, 8 to 6.8 to obtain a cleaning composition.

Example 2 Component Amount Polyoxyethylene (2) Monolauryl phosphoric acid 30% Potassium glyceryl sulfate monomyristate 10% Glycerin 6% Polyoxyethylene sorbitan monostearate 2% Berberine chloride 0.2% Isopropyl methylphenol 0.1 %benzoic acid
0.1% sodium hydroxide
appropriate amount of water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Example 3 Polyoxyethylene (1) monomyristyl phosphate 30% potassium glyceryl sulfate monocaprate 10% lauryl aminoacetic acid betaine 5% azulene 0.2% ethanol
2% oxybenzone
0.1% potassium hydroxide
appropriate amount of water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Example 4 Ingredients Blend amount Polyoxyethylene (3) monomyristyl phosphate potassium salt 30% Potassium glyceryl sulfate monocaprate 10% Propylene glycol 5% Carboxy vinyl polymer 0.4% Glycyrrhetinic acid 0.2% Citric acid
appropriate amount of water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Example 5 Ingredients Blend amount Polyoxyethylene (1) Monolauryl phosphate 20% Potassium glyceryl sulfate monococonut oil fatty acid ester 10% Decaglyceryl monolaurate 5% Dipotassium glycyrrhizinate 0.2% Trichlorocarbani IJ)?
0.1% sodium bicarbonate
suitable for water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Example 6 Ingredients Amount Polyoxyethylene (5) monomyristyl phosphate 20% Potassium glyceryl sulfate monolaurate 5% Potassium lauroyl sarcosine zinc pyrithione 0.1% Trichlorocarbanilide 0.1% Potassium hydrogen carbonate Appropriate amount Water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Example 7 Component Amount Polyoxyethylene (10) monomyristyl phosphate sodium salt 24% Potassium dilauryl phosphate 1% Potassium glyceryl sulfate monocaprate 15% Piroctone olamine 0.1% Paraben 0.1% Lactic acid
appropriate amount of water
A 100% cleaning composition was obtained in the same manner as in Example 1.

Test Example 1 Foaming power test (test sample) The present invention product with the following formulations A-D, and A-D and E
Comparative amounts of formulations of -L were tested.

Sample A Component Amount Polyoxyethylene (2) monolauryl phosphate 15 g Sodium glyceryl sulfate monococonut oil fatty acid ester 5 g Potassium hydroxide aqueous solution Appropriate amount Sample B Component Amount polyoxyethylene (2) monolauryl phosphate sodium salt 20 g Glyceryl sulfate Potassium monolaurate 20g Lactic acid appropriate amount Sample C Ingredient polyoxyethylene (1) monomyristyl phosphate potassium salt Sodium glyceryl sulfate monomyristate Blend amount 0 g 0 g Citric acid appropriate amount Sample D Ingredient Blend amount Polyoxyethylene (5) Monomyristyl phosphate Potassium salt 15g Sodium glyceryl sulfate monocaprate 10g Tartaric acid Appropriate amount For the above samples A to D, instead of adding the corresponding glyceryl sulfate monofatty acid ester or its salt, increase the amount of the corresponding phosphate ester surfactant. Comparative samples A' to D' were used.

Sample E Ingredients Sodium glyceryl sulfate Monococonut oil fatty acid ester Citric acid 0g Proper amount Sample F Ingredient Polyoxyethylene (2) Monolauryl phosphate Coconut fatty acid acylglutamate Monoethanolamine Potassium hydroxide aqueous solution Ingredients 5g g Proper amount Sample G Ingredients Polyoxyethylene (2) Monolauryl phosphate Amount 5g Lauryl methyl taurine potassium hydroxide aqueous solution g Appropriate amount Sample H Component polyoxyethylene (2) Monolauryl phosphate tetradecene sulfonic acid potassium hydroxide aqueous solution amount 5g g Appropriate amount polyoxy Ethylene (3) Sulfofuccinic acid potassium hydroxide aqueous solution g Appropriate amount Sample I Ingredient polyoxyethylene (2) Monolauryl phosphate Ingredients Sample Ingredient polyoxyethylene (2) Monolauryl phosphate Polyoxyethylene sorbitan monostearate Potassium hydroxide Aqueous solution blend amount 5g g Appropriate amount Acyl isethionate potassium hydroxide aqueous solution 5g g Appropriate amount Sample J Component polyoxyethylene (2) Monolauryl phosphate Blend amount Sample L Component polyoxyethylene (2) Monolauryl phosphate polyoxyethylene (60) Cured Amount of castor oil potassium hydroxide aqueous solution: 5g g Appropriate amount: 5g (Test method) The above test sample was adjusted to a pH range of 5.8 to 6.8, and the concentration of surfactant was 4% by weight at 40°C.
100g of C aqueous solution was prepared. This was placed in a graduated cylinder, and the foam volume was measured immediately after shaking 10 times.

(result) Shown in Table 1.

From the results of Samples A-D and A'-D'' in Table 1, the cleaning composition of the present invention has improved foaming power compared to the cleaning composition containing only a phosphate ester surfactant. In addition, from the results of Samples A, A, and E, the cleaning composition of the present invention contains a phosphate ester surfactant alone or a glyceryl sulfate monofatty acid ester or its salt alone. It can be seen that the foaming power is synergistically improved compared to the foaming power of the agent composition.

Furthermore, from the results of Samples A, E-J, and L, it was found that the effect of the present invention was obtained when other anionic surfactants or nonionic surfactants other than glyceryl sulfate monofatty acid ester or its salt were blended. I know that I can't get it.

Test Example 2 Skin Irritation Test (Test Sample) Using Samples A-D and A~D' of Test Example 1 (Test Method) The test sample was adjusted to pH 6.0-6.5, and phosphate ester surfactant was added to the test sample. An aqueous solution was prepared so that the concentration of the agent was 10% by weight. These were applied in 20-batch batches and a 48-hour closed batch test was conducted on 20 humans. One hour after the batch was removed, skin irritation was evaluated in the following four stages.

-: No change ±: Erythema is observed +: Erythema and water spots are observed + Formation of erythema and water spots and bleeding are observed. Calculation of index) Evaluation of skin irritation - 0 points, negative 0.5 points, 10 points 1 point, +
+ was counted as 2 points, and the results were integrated to form a skin irritation index.

(result) Shown in Table 2.

Claims (1)

[Claims] (1) A liquid cleaning composition characterized by containing a phosphate ester surfactant and a glyceryl sulfate monofatty acid ester or a salt thereof.