JPH06305951A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain a detergent composition, excellent in physical detergency, capable of finishing the skin smooth, excellent in usability with hardly any sliminess after washing and excellent in effects on prevention of dermal pruritus. CONSTITUTION:The detergent composition contains sodium chloride in an amount of the saturation solubility or above, an ionic surfactant and water. The sodium chloride is blended in an amount of preferably the saturation solubility or above in water in the composition. A fatty acid soap, etc., are cited as the ionic surfactant. The amount thereof blended is especially preferably >=5wt.%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a detergent composition,
More specifically, it contains sodium chloride with a saturated solubility or higher, an ionic surfactant, and water, and has excellent physical (mechanical) detergency, smooth skin, and excellent usability with little slime after washing. The present invention also relates to a cleansing composition which does not cause itching of the skin.

[0002]

2. Description of the Related Art In recent years, consumers' awareness of cleanliness has been increasing year by year, and cleanliness is the basis of daily life, and various functions and effects are especially required for cleaning agents. Cleaners such as body cleaners and facial cleansers have only the basic function as a cleaner to clean and remove extrinsic stains such as dust and microorganisms (bacteria), and endogenous stains such as sebum, sweat, and dead keratin. There is a need for a function that makes the skin not so tight and smooth and smooth, and that there is no slimy feel of the skin after washing and a refreshing feeling of use. Further, in recent years, the number of patients with atopic dermatitis has been increasing, but not limited to these patients, many people also complain of itching of the skin after washing, and a cleaning agent that does not cause itching of the skin after washing is strongly demanded. .

For the purpose of improving the function and the feeling of use, a detergent containing a scrubbing agent, a clay mineral, a polymer compound or the like has been proposed. For example, a detergent containing montmorillonite as a clay mineral (JP-A-1-190622). A detergent composition containing polymer particles having an average particle size of 100 to 1000 μm and having a specific elastic modulus (JP-A-2-151693).
Japanese patent publication).

[0004]

However, when the above cleaning agent is applied to a cleaning agent for higher fatty acid soaps, etc., montmorillonite precipitates, and it is sticky and the feeling of use is not sufficient. Further, although the detergent composition has an excellent cleaning effect, it is not sufficiently effective in terms of the feeling of use such as smoothness of the skin and refreshing after washing, and thus it is not yet completely satisfactory. Also,
Conventionally, it is well known that a salt such as sodium chloride is added to a detergent for the purpose of thickening, and it is disclosed in JP-A-62-136235.
Japanese Patent Laid-Open No. 1-67235, Japanese Patent Laid-Open No. 2-24
No. 398 and Japanese Patent Application Laid-Open No. 1-107838 disclose detergent compositions containing 0 to 10% by weight of sodium chloride, but these are in a state where sodium chloride is dissolved and not dissolved. Physical (mechanical) detergency due to the absence of crystalline sodium chloride,
It does not have the effect of smoothing the skin.

As described above, in the conventional techniques, the cleansing property, the smoothness of the skin, the feeling of use (there is no slimyness and refreshing after washing) and the like are incompatible with each other. Had the problem that the other effect had to be sacrificed, and its solution was strongly desired.

[0006]

In view of such circumstances, the inventors of the present invention have earnestly studied to develop a detergent composition with improved problems and drawbacks of the above-mentioned prior art, and as a result, sodium chloride having a saturated solubility or higher is obtained. With a detergent composition containing ionic surfactant and water, it has excellent physical (mechanical) detergency, smooths the skin, and gives a lighter wash with less sliminess after washing. Excellent usability,
Moreover, they have found that an excellent cleansing agent that does not cause itching of the skin can be obtained, and completed the present invention.

That is, the present invention provides a detergent composition characterized by containing sodium chloride having a saturated solubility or higher, an ionic surfactant and water.

The present invention will be described in detail below. As the sodium chloride used in the present invention, commercially available ones can be used, and examples of sodium chloride include high-purity purified salt, salt, or rock salt containing sodium chloride as a main component, sun salt, fine salt, and table. Examples thereof include salt, dried seawater, dried mineral spring water, and purified products thereof. The average particle size of sodium chloride is 0.01 mm to 10 m
m particles are preferable, and more preferably 0.1 mm to 5 m.
m. If it is less than 0.01 mm, a sufficient feeling of use tends not to be obtained, and if it exceeds 10 mm, a feeling of discomfort, damage to the skin, etc. tends to occur.

The amount of sodium chloride used in the present invention can be appropriately selected according to the actual application type, but it is preferably a saturated solubility or higher in water in the detergent composition. If it is less than the saturated solubility, sodium chloride does not show crystallinity by dissolving in the detergent composition, and even if crystalline sodium chloride is added by devising a manufacturing method, it gradually dissolves over a long period of time. The desired effect is not achieved.
The term “saturated solubility or higher” means that the solubility of sodium chloride in water in the detergent composition is equal to or higher than the limit, and means 26.5% by weight or more based on the total weight of sodium chloride and water. The upper limit of the compounding amount is not particularly limited in view of the effect of the present invention, but when it is extremely large, the function as a detergent is impaired, so 90% by weight or less based on the total weight of sodium chloride and water is preferable.

The ionic surfactant used in the present invention may be anionic, cationic or amphoteric surfactant, and is not particularly limited. Among the ionic surfactants used in the present invention, examples of the anionic surfactant include fatty acid soap, POE alkyl ether carboxylate, α-olefin sulfonate, higher fatty acid ester sulfonic acid, dialkyl sulfosuccinate and higher fatty acid. Amide sulfonate, alkyl allyl sulfonate, higher alcohol sulfate ester salt, POE alkyl ether sulfate ester salt, glycerin fatty acid ester sulfate ester salt, higher fatty acid alkylolamide sulfate ester salt, alkyl phosphate ester salt, acyl glutamate salt, An acyl amino acid salt such as an acyl sarcosine salt and an acyl-β-alanine salt, a collagen hydrolyzate acyl compound and the like can be applied. In any case, alkali metal salts such as sodium, potassium and magnesium, organic amine salts such as triethanolamine, alkaline amino acid salts such as L-lysine and the like can be used. As the cationic surfactant, an alkylamine salt, a polyamine fatty acid salt, an alkanolamine fatty acid salt, an alkyl quaternary ammonium salt, an alkyltrimethylammonium salt and the like can be used. As the amphoteric surfactant, amino acid type, betaine type, sulfate ester type, sulfonic acid type, phosphate ester type amphoteric surfactants and the like can be used. The blending amount of these ionic surfactants is not particularly limited, but is preferably 2% by weight or more, more preferably 5
It is more than weight%. If it is less than 2% by weight, it is difficult to obtain satisfactory cleaning power and foamability as a cleaning agent.

The detergent composition of the present invention contains sodium chloride and an ionic surfactant, but water is required to dissolve these substances, and a suitable amount of water is other liquid components. However, 5% by weight or more is desirable for the dissolution of the ionic surfactant.

Further, in addition to the ionic surfactant, it is also preferable to use an amine oxide or a fatty acid diethanolamide in order to improve the foamability and to have an appropriate viscosity. In addition, when used in combination with a pearlescent agent such as fatty acid glycol diester and a thickening agent such as hydroxyethyl cellulose, it is possible to prevent the separation and aggregation of sodium chloride crystals and improve the long-term stability over time. Become.

In addition to the above components, components usually used in detergents, such as wetting agents, colorants, preservatives, touch improvers, perfumes, bactericides, antiphlogistics, ultraviolet absorbers, etc., can be used for the effects of the present invention. It can be used within a range that does not impair it.

The cleansing composition of the present invention can be widely used for skin cleansing agents such as whole body cleansing agents, bar soaps, facial cleansers and the like.

[0015]

EXAMPLES Next, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto. The blending amount is% by weight. Prior to the examples, the evaluation method will be described.

Measurement of Cleaning Effect An artificial sebum containing 2% carbon black was applied to the measurement site of the left forearm and dried for a certain period of time, and then the upper stain was wiped off so that the stain remained in the skin groove. Next, using a colorimeter (made by Minolta), the brightness (L
₂ ) is measured, and at the same time, the brightness (L ₁ ) of the uncoated area is also measured. Next, a cleaning process was performed with each cleaning agent. After the washing treatment, the left forearm is dried, and the brightness (L ₃ ) of the treated portion is measured again. The washing ratio was calculated from the lightness values obtained by the above equations.

Cleaning rate (%) = 100 × (L ₂ -L ₃ ) /
(L ₂ -L ₁₎

Evaluation of smoothness of skin and feeling of use 20 professional beauty technicians were made to use each cleaning agent,
With respect to the smoothness (smoothness) of the skin after washing and the sliminess (smoothness) of the skin, a 5-point evaluation was performed according to the criteria in Table 1, an average value was calculated, and the average value was determined according to the criteria in Table 2. Indicated by ○, △, ×.

[0019]

[Table 1]

[0020]

[Table 2]

Evaluation of itching of the skin When using a conventional cleansing agent, 10 specific panelists who felt itchy on the skin were made to use each of the cleansing agents, and the itching of the skin after washing was evaluated according to the criteria in Table 3. Was evaluated by 5 points, and the average value was calculated.

[0022]

[Table 3]

Examples 1 to 3 and Comparative Examples 1 to 4

[0024]

[Table 4]

Table 4 shows the formulation and evaluation results of the body shampoo prepared by the conventional method. As is clear from Table 4, Examples 1 to 3 of the present invention are more effective than Comparative Examples 1 to 4 in cleaning effect, smoothness of skin (smoothness), feeling of use (sliminess, refreshing feeling), and It was excellent in terms of preventing itching.

Example 4 A soap having the following composition was produced by a conventional method. (1) Sodium chloride 20.0 (2) Beef tallow fatty acid sodium 42.0 (3) Dibutylhydroxytoluene 0.1 (4) Cetanol 2.5 (5) Purified water 35.4 ────────── ───────────────── Total 100.0

Example 5 A face-wash foam having the following composition was produced by a conventional method. (1) Special grade purified salt 40.0 (2) Potassium laurate 30.0 (3) Glycerin 6.0 (4) Sodium N-acylglutamate 2.0 (5) Sodium benzoate 0.1 (6) Purified water 21.9 ────────────────────────── Total 100.0

Example 6 A body soap having the following composition was produced by a conventional method. (1) Sodium chloride 30.0 (2) Rock salt 20.0 (3) Triethanolamine laurate 15.0 (4) Polyoxyethylene lauryl sulfate sodium (2EO) 8.0 (5) Glycerin 10. 0 (6) edetate 0.1 (7) methylparaben 0.1 (8) purified water 16.8 ────────────────────────── ─ Total 100.0

Example 7 A body shampoo having the following composition was produced by a conventional method. (1) Sodium chloride 50.0 (2) Sun salt 20.0 (3) Potassium laurate 8.0 (4) Potassium myristate 3.0 (5) Cocoamide betaine 2.0 (6) Coconut oil fatty acid diethanolamide 2.0 (7) Ethylene glycol distearate 2.0 (8) Hydroxyethyl cellulose 0.1 (9) Preservative 0.3 (10) Purified water 12.6 ────────────── ────────────── Total 100.0

The cleaning agents of Examples 4 to 7 were all good in terms of cleaning effect, smoothness of the skin (smoothness), feeling of sliminess during use, and prevention of itching of the skin.

[0031]

The detergent composition of the present invention is excellent in physical (mechanical) detergency, has a smooth finish on the skin, has little sliminess after washing, and gives a refreshing cleansing feeling. It is intended to provide a detergent composition which is excellent and has an effect of preventing itching and the like of the skin.

Claims (1)

[Claims] 1. A detergent composition comprising sodium chloride having a saturated solubility or higher, an ionic surfactant, and water.