JPH01149715A - Skin-cleaning agent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition giving excellent cleamy bubbles, having stable color tone, storable over a long period and suitable especially as a solid soap, etc., by adding specific amounts of a specific saturated fatty acid and a chelating agent to a skin cleaning composition containing a clay mineral. CONSTITUTION:A skin-cleaning composition containing a clay mineral is compounded with (A) 0.05-5wt.%, preferably 0.1-3wt.% (based on the whole composition) of a >=20C saturated fatty acid and (B) 0.01-1wt.%, preferably 0.02-0.7wt.% of a chelating agent (especially preferably ethylenediaminetetraacetic acid, ethane-1-hydroxy-1, 1-disulfonic acid, etc.). The clay mineral is e.g., kaolinite containing natural hydrated aluminum silicate as a main component and the compounding amount of the mineral is 5-50wt.% based on the whole composition. The fatty acid is preferably arachidic acid, behenic acid, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a skin cleansing composition containing clay minerals, and particularly to a skin cleansing composition that has high creaminess of foam and excellent color stability. .

The points that we will try to solve in the coming days are:
Various skin cleansing agents such as bar soaps containing naturally occurring clay minerals have been proposed.

On the other hand, as is well known, fatty acids such as myristic acid, palmitic acid, and stearic acid are added to skin cleansing agents to improve the creaminess of the foam.

In the skin cleansing agent containing the above-mentioned clay mineral, the creaminess of the foam can be improved by adding a fatty acid as in a normal skin cleansing agent.

However, since clay minerals contain various metal ions such as iron ions, skin cleansers containing clay minerals tend to change color during storage, and especially when fatty acids are added, the color tone of the cleanser may change due to oral administration. There is a problem of significant deterioration. For this reason, it has been difficult to improve the creaminess of foam without deteriorating the quality of skin cleansers containing clay minerals.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a clay mineral-containing skin cleansing composition that has good foam creaminess and excellent color stability.

In order to achieve the above objects, the present inventors have made extensive studies and found that a saturated fatty acid having 20 or more carbon atoms is added to a skin cleansing composition containing clay minerals. Total 0.05-5
At the same time, the amount of Kill-1 agent is 0% by weight of the entire composition.
．． When 01 to 1% by weight is blended, the color tone of the composition will not deteriorate even if the fatty acid is blended orally, and the color tone at the time of preparation can be maintained even when stored for a long period of time, and the creaminess of the foam will be improved. It was discovered that a skin cleansing composition which is excellent and has high color stability can be obtained, and the present invention was completed.

Therefore, the present invention provides a skin cleansing composition containing clay minerals with saturated fatty acids having 20 or more carbon atoms.
．． Provided is a skin cleansing composition characterized in that a chelating agent is blended in an amount of 0.05 to 5% by weight, and a chelating agent is blended in an amount of 0.01 to 1% by weight based on the total composition.

The present invention will be explained in more detail below.

The skin cleansing composition of the present invention contains natural clay minerals and is used as a composition in various forms, but is particularly preferably used as a solid soap.

Here, specific examples of clay minerals include kaolinite, montmorillonite, pyrophyllite, halloysite, sericite, etc. whose main component is natural hydrated aluminum silicate, and one or more of these are blended. can do. In addition.

The content of the clay mineral is not particularly limited, but is approximately 5 to 50% by weight of the entire composition.

In the present invention, a saturated fatty acid having 20 or more carbon atoms and a chelating agent are blended into a skin cleansing composition containing the clay mineral.

In this case, the fatty acid is not particularly limited as long as it is a saturated fatty acid having 20 or more carbon atoms, and various fatty acids may be blended. For example, aracic acid, behenic acid, lignoceric acid, etc. are preferably used. Note that these fatty acids may be used alone or in combination of two or more.

In addition, the blending amount of this fatty acid is 0.05 to 5% of the total composition.
% (weight %, hereinafter the same), preferably 0.1 to 3%. If the amount of fatty acid blended is less than 0.05%, the creaminess of the foam will not be sufficiently improved, and if it is more than 5%, the color tone stability will be poor.

Next, various chelating agents are selected, but in particular, ethylene cyamine diacetic acid (hereinafter referred to as EDTA) or its alkali metal salt, ethane-1-hydroxy-1,1
It is preferable to use one or more of -diphosphonic acid (hereinafter referred to as EHDP) or an alkali metal salt thereof.

The content of the chelating agent is 0.01 to 1%, preferably 0.02 to 0.7% of the total composition. If the amount of the chelating agent is outside the above range, the color tone of the composition cannot be maintained stably.

When the skin cleansing composition of the present invention is prepared as a soap, for example, it can be obtained by adding the above-mentioned components to a soap base, which is a cleansing component, and using a conventional manufacturing method.

Here, the soap base can be manufactured according to a conventionally known method, and includes, for example, animal fats and fats represented by beef tallow, liver fat, whale fat, fish fat, etc., coconut oil, palm oil, palm kernel oil,
Either individual or mixtures of vegetable oils and fats such as soybean oil, olive oil, cottonseed oil, etc. are saponified with alkali, etc.
Alternatively, it can be produced by neutralizing various fatty acids and resin acids with an alkali or the like.

Additionally, other surfactants can be added to the soap base to further enhance cleaning power. Examples of the surfactant include α-sulfo fatty acid ester, isethionate ester, alkylaryl sulfonic acid, alcohol sulfate ester, alcohol ethoxylate sulfate ester, olefin sulfonic acid, paraffin sulfonic acid, N-acylglutamic acid, and their esters. Further examples include alkali metal salts of , alkyl betaines, alkyl sulfobetaines, and the like.

Furthermore, the composition of the present invention can be prepared depending on the dosage form, purpose of use, etc.
If necessary, arbitrary components other than the above-mentioned components can be added. Other ingredients specifically include 1 pigment, fragrance,
Anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate, disinfectants such as 2,4.4'-)-lichloro-2'-hydroxydiphenyl ether, 3,4゜4'-trichlorocarbanilide (TCC), and benzoic acid, and for the skin. hydrocarbons such as squalane, wax, and vaseline, polyols such as glycerin, polyethylene glycol, and propylene glycol, protective agents such as silicones such as dimethyl silicone, and various other proteins and protein derivatives, which adjust the residual oil effect of Examples include drugs such as vitamins, and these can be added at an appropriate stage of composition production.

The skin cleansing composition of the present invention has very good foam creaminess and high color stability, and retains the original color tone even when stored for a long period of time. Excellent value and practical value.

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

In addition, the evaluation methods adopted by each side are shown in advance of each side.

(2): Creamy soap containing neither fatty acids having 20 or more carbon atoms nor chelating agents was used as a standard product and evaluated by 10 panelists according to the following criteria.

3: The creaminess of the foam is considerably better than that of the standard product.

2: Good.

1: Same level.

0:l! Inferior.

Next, the average score of the 10 panelists was evaluated according to the following criteria. Note that those with an evaluation of 0 or more were considered to have good foam creaminess.

◎: Average evaluation score is 2.5 or more 0: n 2 or more and less than 2.5 Δ:
1 or more and less than 2 ×: Less than 1 Ω Halo” The bar soap on each side was stored at 45°C for 7 days, and the sample previously stored in a cool and dark place was used as a control sample, and 20 panelists met the following criteria. Visual evaluation was performed according to the following.

0: There is no difference in color tone compared to the control sample.

1: Slightly discolored compared to JJ.

2: Slightly discolored compared to n.

3: The color has changed considerably.

4: Significant discoloration.

Next, the average evaluation score of the 20 panelists was determined. Note that those with an evaluation score of 1 or less were considered to have good color stability.

[Example 1. Comparative Examples 1 to 3] Solid soaps having the composition shown in Table 1 were prepared by a conventional method, and their properties were evaluated by the above evaluation method.

The results are shown in Table 1.

From the results in Table 1, the bar soaps according to the present invention lacking either the fatty acid (araxic acid) or the chelating agent (EDTA) (Comparative Examples 1 to 3) are inferior in foam creaminess and color stability; Solid soap containing image components (Example 1)
) was confirmed to have good creamy foam and stable color tone.

[Examples 2-4. Comparative Examples 4 to 6] Solid soaps having the formulations shown in Table 2 were prepared by a conventional method, and their properties were evaluated.

The results are shown in Table 2.

From the results in Table 2, fatty acid (behenic acid) according to the present invention
and chelating agent (EHDP) in an amount outside the range of the present invention (Comparative Examples 4 to 6) are solid soaps that are inferior in foam creaminess and color stability, but contain one stroke component together within the range of the present invention. The foam had good creaminess and color stability.

[Example 5] A soap having the following formulation was prepared by a conventional method.

Stone*3 72.47
Heavy Kaolin 25.0 Allantoin 0.2 Lignocerin 1.5 E D T A O,03E HD
P O, titanium trioxide
0.3 Total 100.0
Weight %*3 Sodium tallow fatty acid/sodium coconut fatty acid = 80/20 This soap had good creamy foam and stable color tone.

Applicant: Laion Co., Ltd. Agent: Patent Attorney Takashi Kojima

Claims (1)

[Claims] 1. In a skin cleansing composition containing clay minerals, 0.05 to 5% by weight of a saturated fatty acid having 20 or more carbon atoms is added to the total composition, and a chelating agent is added to 0.0% of the total composition.
A skin cleansing composition characterized by containing 1 to 1% by weight.