JPH09272894A - Sodium chloride-containing detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition whose change of state is reduced despite that the surfactant is used in high concentration and crystals of sodium chloride are mixed. SOLUTION: This detergent composition comprises >=10%, based on the whole composition, of a surfactant mainly composed of a carboxylic acid type surfactant, >=1% of sodium chloride crystals and a polyhydric alcohol, for example, ethylene glycol, polyethylene glycol, glycerol, diglycerol, polyglycerol, propylene glycol and the like and substantially contains no water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleansing composition containing salt crystals, and more particularly, it is stable for face washing and body washing with little change in shape despite containing salt crystals. The present invention relates to a salt-containing detergent composition that can be used as an agent or as a toothpaste.

[0002]

2. Description of the Related Art Cream-like cosmetic cleansing agents have been commercialized for facial cleansing since ancient times, but in recent years, they have also been used in large amounts as personal cleansing agents. By the way, salt is often blended in toothpastes because it has the effect of tightening the gums. Recently, the present inventors have tightened the skin by blending this salt with a cleansing agent such as a face-wash cream and body wash. It has been found that it is possible to obtain a slimming effect.

However, it is actually extremely difficult to incorporate salt into the detergent, which has been a serious problem in the practical application of the detergent containing salt.

That is, in general facial cleansing creams and body cleansing systems, in order to have good foaming, 20 to 4 are used.
0% of an active agent such as an anionic surfactant, a water-soluble polymer for imparting thickening, a thickening surfactant such as polyethylene glycol (6000) distearate,
It is composed of a polyhydric alcohol intended to prevent icing and the like, and is prepared by dissolving or dispersing it in water or a polyhydric alcohol aqueous solution such as glycerin.The most difficult problem in such a system is It is said that there is a change in viscosity and stability over time.

The anionic surfactant is not so soluble in an aqueous solution at a low temperature and is likely to be crystallized, but when the temperature is increased, the anionic surfactant is rapidly dissolved in water and is almost infinitely dissolved (the solubility greatly changes). Since the temperature is called Kraft point), it has been a problem that the viscosity and the state change greatly with temperature in a system containing a large amount of this.

On the other hand, when salt crystals are added to a general detergent system, water absorption, dissolution, and recrystallization of salt occur continuously,
Since there is a problem that salt grows into large crystals or dissolves and disappears, it has been difficult to stably mix salt crystals.

It is easily conceivable that the system should be a non-aqueous system in order to stably mix the salt into the detergent.
It is actually a difficult problem to prepare a detergent composition in a non-aqueous system.Furthermore, when a polyhydric alcohol such as ethylene glycol or glycerin is added to the system, its strong water absorption makes It was extremely difficult to maintain the condition.

As described above, it is a very difficult problem to obtain a detergent with a small amount of state change while maintaining salt crystals while using a surfactant in a high concentration. There was a difficulty in comparison with a salt-containing dentifrice composition having a concentration of 10% or less and thickening with a water-soluble polymer or silicic acid anhydride.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a detergent composition which solves the above-mentioned problems and which can be blended with sodium chloride in a crystalline state stably and without changing the state. .

[0010]

Means for Solving the Problems The inventors of the present invention have made extensive studies as to the composition of the cleaning agent in order to solve the above-mentioned problems, and as a result, have found that a polycarboxylic alcohol containing almost no water can be treated with a carboxylic acid type surfactant. The present invention has been completed by discovering that a detergent composition having low water absorption can be obtained by dispersing a surfactant containing as a main ingredient, and a salt crystal can be stably mixed.

That is, the present invention provides a salt-containing detergent composition containing 10% or more of a surfactant, 1% or more of salt crystals and polyhydric alcohol, and substantially free of water, based on the total composition. It is a thing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the salt-containing detergent composition of the present invention (hereinafter referred to as "detergent composition"), examples of the surfactant used include carboxylic acid type surfactants. As the carboxylic acid type surfactant, for example, a fatty acid salt (so-called soap), an acylamino acid salt, an alkyl ether carboxylate or the like can be used.

More specifically, as the fatty acid salt, fatty acids having 8 or more carbon atoms, that is, capric acid, lauric acid,
Examples thereof include alkali metal salts such as myristic acid and stearic acid, amine salts, and basic amino acid salts. Among these, alkali metals include sodium, potassium, lithium, etc., and amines include ammonia, ethylamine, ethanolamine, butylamine, etc. However, examples of the basic amino acid include arginine and the like.

Examples of the acyl amino acid salt include acylated products of various amino acids, and specific examples include lauroyl sarcosinate, lauroyl alaninate, lauroyl methyl alaninate, lauroyl glycine, lauroyl asparaginate and the like. It

Further, as the alkyl ether carboxylate, a carboxymethylated product of polyoxyethylene alkyl ether is exemplified, and the alkyl chain thereof has preferably 8 or more carbon atoms and the polyoxyethylene chain has 1 to 10 carbon atoms. Of the above-mentioned carboxylic acid type surfactants, fatty acid salts are particularly preferable.

On the other hand, examples of surfactants other than the carboxylic acid type surfactant (hereinafter, may be referred to as "other kinds of surfactants") include polyoxyethylene alkyl ether, polyoxyethylene alkyl ether sulfate, Examples thereof include alkyl sulfates, alkyl sulfonates, alkyl taurates, alkylamidoamines and alkylamine oxides.

The surfactant, which is a combination of a carboxylic acid type surfactant and another type of surfactant, is 10% by weight (hereinafter, simply indicated by "%") or more, preferably 15 to 60%, based on the total composition.
The degree is mixed. Further, the carboxylic acid type surfactant is
It is preferably 30% or more, especially 35% or more of the total surfactant.

The salt crystals to be blended in the detergent composition of the present invention can be used regardless of the size thereof, and both natural and synthetic crystals can be used, and not necessarily 10
It does not have to be 0% sodium chloride, and those containing a large amount of various mineral components such as natural salt can also be used. This salt crystal is blended in an amount of 1% or more, preferably 1 to 15%, based on the entire composition.

Further, the polyhydric alcohol used in the detergent composition of the present invention means alcohols having two or more hydroxyl groups in the molecule, and examples thereof include liquid ethylene glycol, polyethylene glycol and glycerin. , Diglycerin, polyglycerin, propylene glycol, polypropylene glycol, 1-3 butylene glycol, maltitol and the like. Furthermore, naturally, it is also possible to use a powdered polyhydric alcohol such as sorbitol, dextrin, sucrose, trehalose together.

The polyhydric alcohol is blended in the detergent composition of the present invention in an amount of about 20 to 80%.

In preparing the cleaning composition of the present invention,
It is necessary to consider not only the blending amount of each of the above components but also the blending ratio of the polyhydric alcohol and the surfactant. The compounding ratio of the polyhydric alcohol and the surfactant is generally 9 to 1.
5 and particularly preferably 5 to 1.5.

Further, in the detergent composition of the present invention, it is important that the composition contains substantially no water. The term "substantially free of water" as used herein means that the presence of water that does not contribute to the dissolution of the salt crystals is allowed, and in general, the presence of water of 1% or less substantially eliminates water. Will not be included.

Among the detergent compositions of the present invention, particularly preferred is that the main part of the surfactant is a carboxylic acid type surfactant, and the following conditions (1) and (2)
(1) The ratio of the polyhydric alcohol to the total surfactant in the composition is 9 to 1.5, and (2) the carboxylic acid type surfactant in the total surfactant is 30% or more.

The cleaning composition of the present invention described above includes
Further, various optional components can be added within a range that does not impair the effect. Examples of the optional components include carboxyvinyl polymers, carboxymethylcellulose, water-soluble polymers such as polypeptides, fragrances, dyes, and antioxidants.

The detergent composition of the present invention thus obtained is a cream-like cosmetic detergent, for example, a face-wash detergent,
It can be used as a personal cleansing agent or a toothpaste.

[0026]

Although the detergent composition of the present invention does not exhibit water absorption while containing a large amount of polyhydric alcohol and the mechanism of action for stably retaining salt crystals is not clear, it is the main surfactant. It is considered that the carboxylic acid type surfactant strongly interacts with the polyhydric alcohol to inhibit the water absorption.

[0027]

EXAMPLES The present invention will be described in more detail with reference to Examples and Test Examples, but the present invention is not limited to these Examples.

Example 1 Creamy Body Wash Composition: A creamy body wash composition was prepared by the composition of Table 1 and the following production method. All raw materials used in the formulation were commercial products called anhydrous.

[0029]

(Production Method) Each of the above raw materials was placed in a vacuum emulsification kettle, heated to 80 ° C., all components were uniformly dissolved with stirring, then cooled with stirring, and left at 30 ° C. As a result, a creamy personal cleansing composition was obtained.

Test Example 1 Stability Test (1): Inventive products 1 and 2 and comparative product 1 prepared in Example 1 were allowed to stand at 40 ° C. for 1 month,
The state of the mixed salt was observed. The results are shown in Table 2.

[0032]

As is clear from the above results, no change was observed in the state of the cream-type personal cleansing composition prepared with a composition substantially free of water (water content of 1% or less). In the comparative example containing more than 1%, the crystal disappeared.

Example 2 Creamy face cleansing composition: A creamy face cleansing composition was prepared by the composition of Table 1 and the following production method. All raw materials used in the formulation were commercial products called anhydrous.

[0035]

(Production Method) A cream-like face cleansing composition was obtained in the same manner as in Example 1.

Test Example 2 Stability Test (2): In the same manner as in Test Example 2, stability of the product 3 of the present invention and the comparative products 2 and 3 prepared in Example 2 was examined. Table 4 shows the results.

[0038]

As is clear from these results, dissolution of salt crystals was observed when sodium laurate, which is a carboxylic acid type surfactant, was not compounded or when the compounding amount was small.

Example 3 Face Wash Cream: A face wash cream having the following composition was prepared in the same manner as in Example 1.

(Composition) Salt microcrystals 2.0% Carboxyvinyl polymer 0.1 Sodium laurate 10.0 Sodium isethionate 15.0 Polyoxyethylene (10) 5.0 Lauryl ether glycerin 57.9 Dipropylene glycol 10.0

The facial cleansing cream thus obtained had a storage stability at room temperature for one year or more, and no change in the state of salt crystals was observed even after it was stored at a temperature of 40 ° C. for one month. Further, this face-wash cream had foaming properties and a good feel after washing, and was suitable for practical use.

Example 4 Body Wash: A body wash having the following composition was prepared in the same manner as in Example 1.

(Composition) Salt microcrystals 1.5% Seaweed extract 2.0 Sodium isethionate 10.0 Sodium laurate 10.0 Sodium lauroyl glutamate 5.0 Glycerin 62.5 Trehalose 10.0

The obtained body cleansing agent did not change its state even when left at room temperature for 1 year or longer, and salt crystals did not disappear even when left at 40 ° C. for 1 month. that's all

Claims (3)

[Claims] 1. A surfactant of 10% or more based on the total composition,
A salt-containing detergent composition containing 1% or more of salt crystals and a polyhydric alcohol and containing substantially no water. 2. The salt-containing detergent composition according to claim 1, which is a cream-like cosmetic detergent. 3. The main part of the surfactant is a carboxylic acid type surfactant, and the following conditions (1) and (2), (1) ratio of polyhydric alcohol to total surfactant in the composition: Is 9 to 1.5, (2) The carboxylic acid type surfactant in all the surfactants is 30
The salt-containing detergent composition according to claim 1, which satisfies the above condition.