JPS63154616A - Creamy or liquid skin detergent composition and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled composition, containing an alkali soap and polyvalent metallic soap having the number of carbon atoms of a fatty acid residue within specific ranges and inorganic salt of an alkali metal, etc., having excellent bubbling properties, e.g. foaming or creamy properties etc., as well as preservation stability. CONSTITUTION:A composition obtained by containing (A) 10-50wt.% alkali metal salt or organic amine salt of an 8-22C, preferably 10-18C higher fatty acid, (B) 0.1-5wt.% polyvalent metal salt of an 8-22C, preferably 10-18C higher fatty acid and (C) 0.1-5wt.% electrolyte selected from an inorganic salt of an alkali metal or organic amine or alkali metal salt or organic amine salt of an organic acid. The above-mentioned detergent composition is obtained by reacting an alkali metal salt or organic amine salt of an 8-22C higher fatty acid with a smaller molar amount of a water-soluble inorganic polyvalent metal salt or polyvalent metal salt of a water-soluble organic acid.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a creamy or liquid skin cleansing composition that has good foaming performance such as foaming and creaminess of the foam, and has excellent storage stability, and its production. Regarding the method.

Until now, in order to improve the lathering and foam quality of creamy or liquid skin cleansers, attempts have been made to incorporate higher fatty acids, higher alcohols, etc. into skin cleansers. There is.

However, although the foaming and foam quality of creamy or liquid skin cleansers can be improved to some extent by incorporating higher fatty acids or higher alcohols, it is still difficult to say that the skin cleansers have sufficient foaming performance. Furthermore, creamy or liquid skin cleansers containing higher fatty acids or higher alcohols may undergo phase separation when stored at temperatures above 30°C, and may solidify when stored at low temperatures below 10°C, resulting in poor storage stability. It had the disadvantage of being inferior to

Therefore, it has been proposed to add nonionic surfactants to creamy or liquid skin cleansers containing higher fatty acids, higher alcohols, etc. to improve the solubilizing power and storage stability of the system. .

However, when a nonionic surfactant is blended into a skin cleansing agent, it gives a slimy feeling during rinsing, so this skin cleansing agent is completely disliked by consumers, especially when used for the body.

On the other hand, JP-A-61-157598 proposes a method of improving foaming performance by incorporating divalent metal salts of water-insoluble higher fatty acids into creamy or liquid skin cleansers. However, skin cleansers containing divalent metal salts of water-insoluble higher fatty acids tend to decrease in viscosity or cause separation over time. Due to its inferior performance, there were problems with ease of use, and it did not satisfy consumers at all.

Therefore, it has excellent foam performance and storage stability, and is easy to use.
There was a desire to develop a cream or liquid skin cleanser of high quality that would satisfy consumers.

The present invention was made in view of the above circumstances, and provides a cream or liquid skin cleansing composition that has good foam performance such as foaming and creaminess of the foam, and has excellent storage stability, and a method for producing the same. The purpose is to

Means and F for Solving the Problems] Hajime Nukugawa As a result of intensive studies to solve the above problems, the present inventors have developed an alkali metal salt or an organic amine salt of a higher fatty acid having 8 to 22 carbon atoms. From this, a small molar amount of a water-soluble inorganic polyvalent metal salt or a water-soluble organic acid polyvalent metal salt is reacted to form a part of the alkali metal salt or organic amine salt of the higher fatty acid having 8 to 22 carbon atoms. Alkali metal salts or organic amines of higher fatty acids having 8 to 22 carbon atoms by converting them into polyvalent metal salts and producing inorganic salts of alkali metals or organic amines or alkali metal salts or organic amine salts of organic acids. A cream or liquid skin cleanser containing a salt, a polyvalent metal salt of a higher fatty acid having 8 to 22 carbon atoms, and an inorganic salt of an alkaline earth metal or an organic amine, or an alkali metal salt or an organic amine salt of an organic acid. The inventors have found that this creamy or liquid skin cleansing composition has good foam performance such as foaming and creaminess of the foam, and has excellent storage stability.

That is, as mentioned above, it is known that foaming performance is improved when water-insoluble divalent metal salts of higher fatty acids (hereinafter referred to as polyvalent metal soap) are added to skin cleansers (Japanese Patent Laid-Open No. 61 No. 157598), however, simply incorporating a polyvalent metal soap had problems in terms of viscosity reduction over time and storage stability at low temperatures. However, the present inventors have discovered that a water-soluble inorganic polyvalent metal salt or a water-soluble organic acid A cream or liquid skin cleansing composition in which an alkali soap obtained by reacting polyvalent metal salts with a polyvalent metal soap coexists with electrolytes (alkali metals or organic amines, inorganic The electric charge of alkaline soaps and polyvalent metal soaps is weakened by the action of salts (alkali metal salts of organic acids or organic amine salts), and the molecules in the composition form a strong hydration network, resulting in a viscous and stable gel. Therefore, it is possible to prevent the viscosity from decreasing over time, causing phase separation, and solidifying at low temperatures as much as possible. Therefore, it is possible to create creamy or liquid-like products with good foaming performance and excellent storage stability. It has been discovered that a skin cleansing composition can be obtained.

Therefore, the present invention provides an alkali metal salt or an organic amine salt of a higher fatty acid having 8 to 22 carbon atoms, a polyvalent metal salt of a higher fatty acid having 8 to 22 carbon atoms, and an inorganic salt or organic amine salt of an alkali metal or organic amine. A cream or liquid skin cleansing composition characterized by containing an alkali metal salt of an organic acid or an organic amine salt, and an alkali metal salt or an organic amine salt of a higher fatty acid having 8 to 22 carbon atoms. By reacting a smaller molar amount of a water-soluble inorganic polyvalent metal salt or a water-soluble organic acid polyvalent metal salt, a portion of the alkali metal salt or organic amine salt of the higher fatty acid having 8 to 22 carbon atoms is converted into a polyvalent metal salt. Provided is a method for producing a cream or liquid skin cleansing composition, which is characterized by converting the composition into a valent metal salt and producing an inorganic salt of an alkali metal or an organic amine or an alkali metal salt or an organic amine salt of an organic acid.

The present invention will be explained in more detail below.

The cream or liquid skin cleansing composition of the present invention contains an alkaline soap and a polyvalent metal soap whose fatty acid residues have 8 to 22 carbon atoms.

Here, the alkaline soap is one or more selected from alkali metal salts and organic amine salts of higher fatty acids having 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms. In this case, the higher fatty acid may be saturated or unsaturated, linear or branched, but linear saturated fatty acids are preferred.

Furthermore, as the organic amine salt, an alkanolamine salt having 2 to 4 carbon atoms is preferably used. Specifically, as an alkaline soap, one or more of myristic acid, palmitic acid, stearic acid, coconut oil fatty acid, and triethanolamine salt, sodium salt, potassium salt, lithium salt, etc. of these mixed fatty acids are used. can be used.

The content of the alkaline soap can be selected from various methods, but it is 10 to 50% by weight based on the total amount of ingredients in the skin cleansing composition.
In particular, it is preferably 15 to 35% by weight.

In addition, the polyvalent metal soap has 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms, as explained above for the alkaline soap.
Polyvalent metal salts of higher fatty acids include magnesium salts, calcium salts, zinc salts, aluminum salts, iron salts, etc., and it is particularly preferable to use magnesium salts and calcium salts. Note that these polyvalent metal soaps may contain one type alone or two or more types. The content of polyvalent metal soap is not particularly limited, but is 0.1% of the total component amount of the skin cleansing composition.
The content is preferably 1 to 3% by weight, particularly 1 to 3% by weight.

Furthermore, in the cream or liquid skin cleansing composition of the present invention, in addition to these alkaline soaps and polyvalent metal soaps, inorganic salts of alkali metals and organic amines as electrolytes, and alkali metal salts of organic acids and organic amines are used. Contains one or more salts selected from salts. Here, as the organic amine, alkanolamine is suitable as mentioned above. Further, examples of inorganic salts include sulfates, chlorides, etc., and examples of organic acids include phosphoric acid, citric acid, etc. The content of these electrolytes is 0.1 to 5% by weight, especially 0.
．． The amount is preferably 5 to 3% by weight, and 1.degree. The following method is preferably used for producing a creamy or liquid skin cleansing composition containing the above-mentioned components.

That is, by reacting the above-mentioned alkaline soap with a water-soluble inorganic polyvalent metal salt or a water-soluble organic acid polyvalent metal salt, a part of this alkaline soap is converted into a polyvalent metal soap, and the alkali metal or organic amine that is liberated is This produces an inorganic salt, or an alkali metal salt or an organic amine salt of an organic acid.

Here, the water-soluble inorganic polyvalent metal salt and the water-soluble organic acid polyvalent metal salt may be selected as appropriate, and for example, one or two of magnesium salts, calcium salts, zinc salts, aluminum salts, iron salts, etc. It is preferable to use one species or another, particularly magnesium salts such as magnesium sulfate, magnesium phosphate, magnesium chloride, magnesium citrate, and calcium chloride.

Calcium salts such as calcium sulfate, calcium phosphate, and calcium citrate can be suitably used.

In addition, the amount of water-soluble inorganic polyvalent metal salts and water-soluble organic acid polyvalent metal salts used is a smaller molar amount than that of alkaline soap. It is preferable to add one or more types of salts, alkali metal salts of organic acids, and organic amine salts in the above-mentioned content range, and water-soluble inorganic polyvalent metal salts and water-soluble organic acid polyvalent metal salts. This reaction eliminates the valent metal salt from the composition.

In the above reaction, the water-soluble inorganic polyvalent metal salt or the water-soluble organic acid polyvalent metal salt undergoes double decomposition and reacts with the alkali soap, producing a polyvalent metal soap, which is then converted into an alkali soap. At the same time, one or more of inorganic salts of alkali metals and organic amines, and alkali metal salts and organic amine salts of organic acids (
Electrolyte) is generated and this coexists with alkali soap and polyvalent metal soap, so the electric charge of alkali soap and polyvalent metal soap is reduced due to the action of the electrolyte, compared to when alkali soap and polyvalent metal soap are used together. The molecules become more tightly oriented and the water use is strengthened, and a strong water use network is formed between the molecules, resulting in a viscous and stable gel. Therefore, the viscosity of the skin cleansing composition decreases over time and the water use becomes stronger. It rarely separates or solidifies at low temperatures, exhibits excellent storage stability, and improves foaming performance.
A cream or liquid skin cleansing agent, which is the object of the present invention, can be obtained.

The cream or liquid skin cleansing composition of the present invention can be prepared by blending various other components as necessary. Other components include, for example, higher fatty acids having 8 to 22 carbon atoms, higher alcohols, hydrocarbons and esters thereof, lanolin derivatives, lecithin and its derivatives, perfatty acids such as silicones, and glycerin.

Sorbitol, multi-lua polyethylene glycol,
Propylene glycol, 1,3-butylene glycol,
Moisturizers such as sodium pyrrolidone carboxylate 2 Various nonionic surfactants, glycyrrhizin, allantoin,
Aloe powder, vitamin drugs.

Examples include animal and plant extracts, purified water, etc., and these can be added at appropriate stages of composition production.

As described in detail of the invention, the creamy or liquid skin cleansing composition of the present invention has good foaming performance such as foaming and creaminess of the foam, and also does not cause phase separation when stored at high temperatures, and does not cause phase separation when stored at low temperatures. It does not solidify, has excellent storage stability, and is of high quality.

= 11 = The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited to the Examples below.

[Example 1. Comparative Examples 1 to 4] The components shown in Table 1 were heated and mixed at a temperature of 80° C. or higher to dissolve them, and then the mixture was cooled to room temperature with stirring to prepare a liquid skin cleansing composition.

Foaming of each of the five types of liquid skin cleansing compositions obtained,
The creaminess, high-temperature stability, and low-temperature stability of the foam were evaluated according to the following methods and criteria. The results are shown in Table 1.

Foaming and creamy feeling of foam Sample 1. OG was picked up and subjected to a hand washing test by 10 panelists for sensory evaluation.

In this case, 20% by weight of potassium myristate, 5% by weight of propylene glycol, and 75% by weight of purified water were heated and mixed, dissolved and cooled, and evaluated according to the following criteria as a control sample, and the average evaluation value of 10 panelists was evaluated. I asked for

Rating 5: Clearly superior to the control.

4: Slightly better than.

3: Equivalent to .

2: Slightly inferior to .

'J-: Obviously inferior to u.

Average rating of 10 panelists ◎: 4.1 points to 5. Score: 5.0 points 1 ~ 4.0 △: 2.1 ~ 3.0 The presence or absence of separation was visually determined.

O: Good with no separation.

×: Defect with separation.

After sealing 100 g of the sample in a glass bottle and storing it at -5°C for one month, the appearance of the sample was visually judged.

O: Good without solidification.

×: Solidified and defective.

Here, in Table 1, Comparative Example 1 is simply a potassium myristate system (polyvalent metal salt and electrolyte-free system).
Comparative Example 2 is a system in which potassium myristate and magnesium myristate coexist (electrolyte-free system). Further, in Example 1, part of the potassium myristate reacts with all of the magnesium sulfate, so that magnesium myristate, potassium sulfate, and the remaining potassium myristate coexist.

From the results in Table 1, it was confirmed that the products of the present invention were superior in foaming performance and storage stability compared to the comparative examples.

[Example 2] Creamy skin cleansing composition Potassium palmitate 20.0% by weight Palmitic acid 5.0 Magnesium citrate 3.0 Propylene glycol 20.0 Polyethylene glycol 1500 20.0 1.3-Butylene glycol 5.0 Propylene glycol monolaurate 2.0 Sorbitan monooleate 1.0 Fragrance 0.5 Foaming
◎ Creamy feeling of foam ◎ High temperature stability ○ Low temperature stability Q The creamy skin cleansing composition with the above formulation is prepared by heating and mixing the components shown in Example 2 at a temperature of 80°C or higher, dissolving the mixture, and then allowing the mixture to cool to room temperature. It is produced by cooling under stirring until it becomes .

This composition contains magnesium palmitate by reacting a part of potassium palmitate with magnesium citrate, contains potassium citrate, and contains the remaining potassium palmitate, It showed excellent foam performance and storage stability.

Claims (1)

[Scope of Claims] 1. An alkali metal salt or an organic amine salt of a higher fatty acid having 8 to 22 carbon atoms, a polyvalent metal salt of a higher fatty acid having 8 to 22 carbon atoms, and an inorganic alkali metal or organic amine salt 1. A cream or liquid skin cleansing composition comprising a salt, an alkali metal salt of an organic acid, or an organic amine salt. 2. A smaller molar amount of a water-soluble inorganic polyvalent metal salt or a water-soluble organic acid polyvalent metal salt is reacted with an alkali metal salt or an organic amine salt of a higher fatty acid having 8 to 22 carbon atoms. Part of the alkali metal salt or organic amine salt of a higher fatty acid having a number of 8 to 22 is changed into a polyvalent metal salt, and an inorganic salt of an alkali metal or an organic amine or an alkali metal salt or an organic amine salt of an organic acid is generated. A method for producing a creamy or liquid skin cleansing composition, characterized by: