JPH0517341A - Liquid detergent composition with low irritancy - Google Patents

Abstract

(57) [Summary] [Object] To provide a mild and liquid detergent composition containing an acyl isethionate. [Structure] (A) General formula R ¹ COOCH ₂ CH ₂ SO
₃ M ¹ (in the formula, R ¹ represents a C _{7 to} C ₂₁ saturated or unsaturated hydrocarbon group, and M ¹ represents an alkali metal, ammonium, or an alkanolamine having 2 or 3 carbon atoms). At least one selected from acyl isethionates, (B) the general formula R ² COOM ² (wherein R ² represents a C _{7 to} C ₂₁ saturated or unsaturated hydrocarbon group, and M ² is an alkali; A metal, ammonium or C _{2 to} C ₉ alkanolamine), and at least one selected from the higher fatty acid salts represented by (C) and various chelating agents. A hypoallergenic liquid detergent composition comprising: [Effects] The present composition has excellent foaming and foam creaminess, is mild to the skin, and can maintain a stable liquid state even at low temperatures.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a novel hypoallergenic liquid cleansing composition suitable for cleansing the skin.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for safety of various detergents, and a detergent composition which is less irritating to the skin and has excellent foaming properties has been desired.

Hitherto, higher fatty acid salts (soaps) have been most often used because they have both excellent foaming properties and detergency, and also have a refreshing sensation that Japanese people prefer. However, it is not always sufficient for people with skin sensitive to skin irritation.

The acyl isethionate salt is excellent in foamability and detergency, but has a mild action on the skin, and is extremely unique in that it does not cause skin damage even to a person who is sensitive to skin irritation. It is an anionic surfactant that is difficult to dissolve in water, so it is widely used mainly in Europe and the United States as a solid composite soap in combination with a higher fatty acid salt, a so-called syndet bar.

[0005]

In the complex system of an acyl isethionate salt and a higher fatty acid salt, the form thereof is solid as described above, and the liquidity of the acyl isethionate salt is extremely low due to its very low solubility in water. However, it has a drawback that it gives only an extremely unstable composition even at room temperature. Therefore, it is difficult to prepare a liquid composition that can be used for body shampoo and the like, which is a composite of an acyl isethionate and a higher fatty acid salt.

[0006]

[Means for Solving the Problems] The inventors of the present invention have conducted diligent studies to solve the above-mentioned drawbacks in a liquid composition using an acyl isethionate salt, and as a result, as a result, a compound of an acyl isethionate salt and a higher fatty acid salt was obtained. In the system, if at least one chelating agent is used in combination, it shows a uniform and stable liquid even at low temperature, and has excellent foaming and foam creamy properties.
Furthermore, they have found that a liquid detergent composition that is mild to the skin can be obtained, and completed the present invention.

That is, the present invention provides (A) the general formula R ¹ COOCH ₂ CH ₂ SO ₃ M ¹ (I) (wherein R ¹ represents a C _{7 to} H ₂₁ saturated or unsaturated hydrocarbon group, M ¹ represents an alkali metal, ammonium or a C ₂ -C ₃ alkanolamine), and at least one selected from the acyl isethionate salts represented by
(B) General formula R ² COOM ² (II) (In the formula, R ² represents a C _{7 to} H ₂₁ saturated or unsaturated hydrocarbon group, and M ² is an alkali metal, ammonium or C ₂ to C. ₉ shows an alkanolamine of ₉ ), and at least one selected from the higher fatty acid salts represented by (4) and (C) various chelating agents. Liquid detergent composition.

As the acyl isethionate which is the component (A) of the present invention, one having an acyl group in the formula (I) having 8 to 22 carbon atoms is used. The hydrocarbon chain of the acyl group may be linear, branched, saturated or unsaturated, and the distribution of the hydrocarbon chain of the acyl group may be one kind or a combination of two or more kinds.

Examples thereof include single fatty acid acyl such as lauroyl, myristoyl, palmitoyl, stearoyl, 2-ethylhexanoyl, oleoyl, coconut oil fatty acid acyl, tallow fatty acid acyl, hardened tallow fatty acid acyl, palm oil fatty acid. Examples include mixed fatty acid acyls such as acyl and palm kernel oil fatty acid acyl.

Examples of salts of acyl isethionates include alkali metal salts such as lithium, sodium and potassium salts of acyl isethionates, ammonium salts, mono-, di-, triethanolamine salts, mono-, di- and triisopropanolamine salts. Examples thereof include alkanolamine salts having 2 or 3 carbon atoms. Among these, the sodium salt of acyl isethionic acid having an acyl group having a saturated hydrocarbon chain having 10 to 14 carbon atoms is particularly preferable.

The acid of the higher fatty acid salt which is the component (B) of the present invention may be straight chain, branched chain, saturated or unsaturated as long as it has a total carbon number of 8 to 22. .

As these fatty acids, natural fatty acids obtained from animal fats and oils and vegetable fats as well as synthetic fatty acids are used.
Further, these fatty acids may have the same total carbon number distribution and may have the same distribution.

Specifically, lauric acid, myristic acid,
Palmitic acid, stearic acid, oleic acid, behenic acid,
Examples thereof include beef tallow fatty acid, hardened beef tallow fatty acid, coconut oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid and the like. Examples of the salt include, for example, alkali metal salts such as lithium, sodium and potassium salts of the fatty acid, ammonium salts, mono, di, triethanolamine salts, mono, di and triisopropanolamine salts and the like having 2 carbon atoms. To alkanolamine salts 9 to 9.

As the component (C) of the present invention, various known chelating agents are used.

Specifically, edetic acid, ethylenediaminehydroxyethyltriacetic acid, ethylenediaminehydroxyethyldiacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraaminehexaacetic acid, hydroxyethanediphosphonic acid, nitrilotriacetic acid, gluconic acid, hydroxyethylimino. Diacetic acid and the like can be mentioned.

Alkali metal salts such as lithium, sodium and potassium salts, ammonium salts, mono,
One or a mixture of alkanolamine salts having 2 to 9 carbon atoms such as di, triethanolamine salts, mono-, di-, triisopropanolamine salts can be used.

In the composition of the present invention, a suitable amount of the component (A), an acyl isethionate, is usually 1 to 30.
% By weight, preferably in the range of 3 to 15% by weight, and when the content is less than 1% by weight, the creamy property of foam in the composition and the mildness to the skin are not obtained, and the content is 30% by weight.
If it exceeds, the liquid stability at low temperature deteriorates.

In the composition of the present invention, the proper blending amount of the higher fatty acid salt as the component (B) is usually 3 to 40% by weight,
It is preferably in the range of 5 to 30% by weight, and when the content is less than 3% by weight, foaming in the composition is poor,
Feeling slimy during rinsing, the stability of the liquid at low temperatures deteriorates at 40% by weight or more.

The ratio of the component (A) to the component (B) is 1 by weight.
The range of 0: 3 to 1:30 is preferable, and particularly preferably,
It is in the range of 10:10 to 3:25.

In the composition of the present invention, a suitable amount of the chelating agent as the component (C) is usually 0.1 to 10% by weight.
And preferably in the range of 0.2 to 5% by weight, and when the content is less than 0.1% by weight, stability at low temperature cannot be satisfied, and when it is more than 10% by weight, foaming of the composition and The creaminess of the foam is reduced.

The method for preparing the composition is not particularly limited,
It can be prepared according to the method usually used for liquid compositions. In this case, anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants, and viscosities that are usually used in liquid detergent compositions such as shampoos and body shampoos are used within a range that does not impair the object of the present invention. A regulator, an antiseptic, a bactericide, an inorganic or organic salt, a pH regulator, an ultraviolet absorber, a moisturizer, an oily component, a pearling agent, a pigment, a fragrance and the like can be added.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

[Examples] Various compositions having different blending components and blending ratios were prepared, the following tests and observations were carried out, and Table 1 shows the results of evaluation of the compositions. The performance evaluation of the examples was performed as follows.

[Storage stability] Each of the compounded samples was filled in a glass screw tube and sealed, and separately for 1 month in a thermostat at 5 ° C and for 1 month in a thermostat at -5 ° C. Saved. Next, the state of the liquid content was observed and evaluated for these stored products.

○: uniform transparent liquid ×: Crystal precipitation or cloudy state

[Bubbling, creaminess of bubbles, and non-lubricity during rinsing] Female panelist 10 aged 18 to 30
By name, pick up the sample in the same way as in actual use,
The product was soaked in water and actually foamed, and the foaming, the creamy property of the foam and the non-smoothness at the time of rinsing were evaluated and shown as an average.

[0026] ・ Bubbling ・ No luster during rinsing   ○: Very good foaming ○: No slickness during rinsing   △: Regular foaming △: A little slimy feel during rinsing   ×: Poor foaming ×: Sluggishness during rinsing

[Creaminess of foam] ○ ... Fine texture is fine △… The texture of bubbles is normal ×… The texture of the foam is rough

[Hand rough test] Age 18 to 18 for each sample
Using 10 female panelists aged 30 years, the hands were immersed in a 5% sample aqueous solution adjusted to 38 to 40 ° C. for 20 minutes every day.
Repeat this for 4 days. Each hand is immersed in the same sample liquid to be tested daily. Before dipping, every day and on the 5th day of the test, the skin surface of the entire hand was visually observed to determine the presence or absence of rough hands.

Criteria Judgment of the number of people with rough hands 1 or less ○ 2-3 people △ 4 or more people ×

[0030]

[Table 1]

[0031]

EFFECTS OF THE INVENTION According to the present invention, it contains an acyl isethionate, is excellent in foaming and foam creaminess, is hypoallergenic to the skin, and retains a stable uniform liquid even at low temperature. A liquid detergent is provided.

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[Procedure amendment]

[Submission date] August 14, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

That is, the present invention provides (A) a general formula R ¹ COOCH ₂ CH ₂ SO ₃ M ¹ (I) (wherein R ¹ represents a C ₇ to C ₂₁ saturated or unsaturated hydrocarbon, and M 1 ¹ represents an alkali metal, ammonium or a C ₂ -C ₉ alkanolamine), and at least one selected from the acyl isethionate salts represented by
Species, (B) the general formula ^{R 2 COOM 2 (II) (} R 2 in the formula represents a saturated or unsaturated hydrocarbon group of _C 7 ~ _{C 21,} ^{M 2} is an alkali metal, ammonium or _C 2 -C ₉ represents an alkanolamine of ₉ ), and at least one selected from the higher fatty acid salts represented by (C) and at least one selected from (C) various chelating agents. Liquid cleaning composition.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

Examples of the salts of acyl isethionates include alkali metal salts such as lithium, sodium and potassium salts of acyl isethionates, ammonium salts, mono-, di-, triethanolamine salts, mono-, di- and triisopropanolamine salts. Examples thereof include alkanolamine salts having 2 or 9 carbon atoms. Among these, the sodium salt of acyl isethionic acid having an acyl group having a saturated hydrocarbon chain having 10 to 14 carbon atoms is particularly preferable. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 11, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

That is, the present invention provides (A) a general formula R ¹ COOCH ₂ CH ₂ SO ₃ M ¹ (I) (wherein R ¹ represents a C _{7 to} C ₂₁ saturated or unsaturated hydrocarbon, and M 1 ¹ represents an alkali metal, ammonium or a C ₂ -C ₉ alkanolamine), and at least one selected from the acyl isethionate salts represented by
Species, (B) the general formula ^{R 2 COOM 2 (II) (} R 2 in the formula represents a saturated or unsaturated hydrocarbon group of _C 7 _{~C 21, M 2} is an alkali metal, ammonium or _C 2 -C ₉ represents an alkanolamine of ₉ ), and at least one selected from the higher fatty acid salts represented by (C) and at least one selected from (C) various chelating agents. a sexual liquid detergent composition.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location C11D 9:02)

Claims (2)

[Claims] 1. (A) General formula R ¹ COOCH ₂ CH ₂
SO ₃ M ¹ (in the formula, R ¹ represents a C _{7 to} C ₂₁ saturated or unsaturated hydrocarbon group, and M ¹ represents an alkali metal, ammonium, or an alkanolamine having 2 or 3 carbon atoms). At least one selected from acyl isethionates represented by the formula (B): R ² COOM ² (wherein R ² represents a C _{7 to} C ₂₁ saturated or unsaturated hydrocarbon group, and M ² is An alkali metal, ammonium or a C _{2 to} C ₉ alkanolamine), and at least one selected from (C) various chelating agents. A hypoallergenic liquid detergent composition comprising: 2. An acyl isethionate in the composition is 1
-30% by weight, higher fatty acid salt 3-40% by weight, chelating agent 0.1-10% by weight, and the ratio of acyl isethionate to higher fatty acid salt is 10: 3 to 1: 1 by weight%.
The composition of claim 1 which is 30.