JPH0797599A - Aqueous surfactant composition and production thereof - Google Patents

Abstract

PURPOSE:To obtain an aqueous surfactant composition readily pumpable or handleable due to its remarkably reduced viscosity in spite of a high concentration CONSTITUTION:This aqueous surfactant composition in the form of an aqueous solution or a slurry contains 30-65wt.% salt of a higher alcohol sulfate ester having 8-20 alcohol carbon chain length and/or salt of a higher alcohol ethoxylate sulfate ester, 5-30wt.% polyethylene glycol having 100-20,000 weight- average molecular weight and 0.5-5wt.% compound selected from an aliphatic polycarboxylate such as a hydroxyethylenediaminetriacetate, an ethylenediamineteracetatem a citrate, a malate, a salicylate or a sulfosalicylate a benzoate, a benzenecarboxylate having a substituent group, a 1-3C monocarboxylate and a gluconate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous surfactant composition in the form of an aqueous solution or slurry containing a higher alcohol sulfate ester salt or a higher alcohol ethoxylate sulfate ester salt in a high concentration and stably, and a method for producing the same.

[0002]

2. Description of the Related Art The viscosity of a high-concentration surfactant slurry is reduced,
Regarding stability, a method of adding a lower alcohol such as methanol or ethanol (JP-A-49-15706) and a method of adding polyethylene glycol (JP-A-50-116383, JP-B-5-25920). Method of adding sodium sulfate (Japanese Patent Publication No.
No. -15277) is known. However,
Addition of alcohol causes a risk of ignition, and when it is used as a raw material for a liquid detergent, it has a great influence on the product viscosity or aroma, so that its use is limited.

On the other hand, polyethylene glycol can achieve its purpose when the slurry concentration is 50% or less, but has a low viscosity lowering effect in the case of a slurry having a higher concentration, and phase separation during long-term storage. Cause Furthermore, sodium sulfate has a high temperature dependency of the physical properties of the slurry, and sodium sulfate precipitates at low temperatures. Moreover, since it is mixed with a large amount of sodium sulfate, it cannot be used as a liquid detergent.

Further, for lowering or stabilizing the viscosity of a high-concentration surfactant slurry, polyalkylene glycol or its mono- or di-sulfate (JP-A-56).
-36596), polyethylene glycol disulfate (JP-A-56-65098), glycerin or polyglycerin polyethoxylate (JP-A-56-118498), polyoxyethylene alkyl ether (JP-A-SHO). No. 60-32676), neopentyl glycol or a polyalkylene oxide adduct of a polyhydric alcohol having a valence of 3 or more and a sulfuric acid ester salt (Japanese Patent Laid-Open No. 63-8474). However, both have a negative effect on performance depending on the intended use.

[0005]

The present invention contains a higher alcohol sulfate ester salt or a higher alcohol ethoxylate sulfate ester salt in a high concentration, has a low viscosity, is stable without phase separation even during long-term storage, and The present invention provides an aqueous surfactant composition that does not adversely affect the performance and the like depending on the intended use, and a method for producing the same.

[0006]

The aqueous surfactant composition of the present invention is in the form of an aqueous solution or a slurry and is characterized by containing the following components (a), (b) and (c). . (A) Higher alcohol sulfate ester salt and / or higher alcohol ethoxylate sulfate ester salt having an alcohol carbon chain length of 8 to 20: 30 to 65% by weight. (B) Polyethylene glycol having a weight average molecular weight of 100 to 20,000: 5 to 30% by weight. (C) One or two selected from an aliphatic polycarboxylic acid salt, a benzoic acid salt, a benzenecarboxylic acid salt having a substituent, a monocarboxylic acid salt having 1 to 3 carbon atoms and a gluconate salt.
One or more compounds: 0.5-5% by weight. This aqueous surfactant composition has the above-mentioned (b) and (c).
It can be obtained by neutralizing a higher alcohol sulfate or a higher alcohol ethoxylate sulfate with an alkaline substance in the presence of components.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As the higher alcohol sulfate ester salt or higher alcohol ethoxylate sulfate salt of component (a) used as an active ingredient in the aqueous surfactant composition of the present invention, the carbon chain length of the alcohol portion is 8 The thing of -20 is used and it may be saturated or unsaturated. As these raw material alcohols, higher alcohols obtained by reducing natural animal and vegetable oils and fats, and linear or branched higher alcohols obtained by the Ziegler method, oxo method, direct paraffin oxidation method, or the like are used. The average addition mole number of ethylene oxide in the higher alcohol ethoxylate sulfate salt is preferably 10 moles or less, and particularly preferably 5 moles or less.

Higher alcohol sulfate ester salt (hereinafter referred to as A
S) and higher alcohol ethoxylate sulfate ester salt (hereinafter abbreviated as AES) can be produced by a conventionally known method. For example, the corresponding higher alcohol or higher alcohol ethoxylate can be prepared by
It is prepared by reacting chlorosulfonic acid or sulfuric anhydride and then neutralizing the reaction product. In this case, as the neutralizing agent, an inorganic base such as sodium hydroxide, potassium hydroxide or magnesium hydroxide, ammonia,
An organic base such as ethanolamine is used.

The component (a), AS or AES, is incorporated in the aqueous surfactant composition of the present invention in an amount of 30 to 65% by weight, preferably 35 to 63% by weight. The polyethylene glycol as the component (b) has a weight average molecular weight of 500 to
20,000 is used, preferably 500 to 1
It is 10,000. The component (b), polyethylene glycol, is incorporated in the aqueous surfactant composition of the present invention in an amount of 5 to 30% by weight, preferably 10 to 30% by weight. If the content is less than 5% by weight, the effect of lowering the viscosity is insufficient, while if it exceeds 30% by weight, the performance is adversely affected depending on the intended use.

As the component (c), one or two kinds of an aliphatic polycarboxylic acid salt, a benzoic acid salt, a benzenecarboxylic acid salt having a substituent, a monocarboxylic acid salt having 1 to 3 carbon atoms, and a gluconic acid salt. The above is 0.5 to 5% by weight, preferably 1
-4.5 wt% is added to improve storage stability. If the content is less than 0.5% by weight, layer separation due to storage cannot be sufficiently prevented, while if it exceeds 5% by weight, not only the cost becomes high, but also the performance is adversely affected depending on the intended use. There are cases. As the aliphatic polycarboxylic acid salt as the component (c), hydroxyethylenediamine triacetate, ethylenediamine tetraacetate, citrate, malate and the like are used.

Examples of the benzenecarboxylic acid salt having a substituent include salicylic acid and sulfosalicylic acid.
As the monocarboxylic acid salt having 1 to 3 carbon atoms, formate salt, acetate salt, and propionate salt are used. As the salt in the component (c), alkali metal salts such as sodium and potassium, alkaline earth metal salts such as magnesium, organic salts such as ammonium and ethanolamine are used.

The AS or AES high-concentration aqueous solution or slurry of the present invention can be prepared by adding the components (b) and (c) to a separately prepared AS or AES slurry. In order to prevent an increase in the viscosity of the product during or immediately after the neutralization of the ethoxylate sulfate, the components (b) and (c) are dissolved in a pre-curing sodium hydroxide aqueous solution or other neutralizing agent. Alternatively, the compounding neutralizing agent may be used for neutralization. Further, at the time of neutralization, the components (b) and (c) may be simultaneously added together with the neutralizing agent aqueous solution. Thus, it is preferable to neutralize the higher alcohol sulfate ester or the higher alcohol ethoxylate sulfate ester in the coexistence of the components (b) and (c) to produce the aqueous surfactant composition of the present invention.

[0013]

EFFECTS OF THE INVENTION Generally, a high-concentration slurry of AS and AES takes the form of a middle layer liquid crystal at an active ingredient concentration of 30 to 65% and has a viscosity of 1000 poise or more, which makes handling and pumping extremely difficult. . Therefore, in the present invention, by blending polyethylene glycol as the component (b) and carboxylate salts as the component (c) in the AS / AES high-concentration slurry, the viscosity can be reduced and the layers can be separated even during long-term storage. A homogeneous solution without As described above, since the AS / AES slurry of the present invention has a significantly reduced viscosity despite its high concentration, it is easy to pump and handle, and is supplied as an AS and AES raw material in various detergent fields. .

Further, since the slurry containing the active ingredient in a high concentration can be supplied, storage, packaging and transportation costs can be improved. Further, when it is used as a granular detergent raw material for clothing or the like, the drying efficiency in spray drying is improved. Further, since the content of inorganic salts such as salt and mirabilite is small, it is suitable for use as a raw material for liquid detergents for clothes, kitchens, shampoos, rinses, etc., and is extremely versatile.

[0015]

【Example】

Examples 1 to 4 Sulfation of higher alcohol ethoxylates of C13 higher oxo alcohols (average number of moles of ethylene oxide added: 3.0) with SO ₃ gas using an industrial-scale thin film sulfation reactor (Reaction molar ratio 1.00),
The higher alcohol ethoxylate sulfate was obtained. Obtained higher alcohol ethoxylate sulfate 50
0 g was maintained at 40 ° C. or lower, immediately and continuously neutralized with an aqueous solution of sodium hydroxide having a predetermined concentration, and polyethylene glycol and an aqueous solution of sodium benzoate were simultaneously added and mixed at the time of neutralization so as to have the composition shown in Table 1. Further, sodium hydroxide was also added and mixed so that the composition shown in Table 1 was obtained. The mixture was stirred under strong stirring at about 40 to 50 ° C. for 10 minutes to obtain a high-concentration aqueous solution or slurry of higher alcohol ethoxylate sulfate ester salt shown in Table 1. The viscosity of these high-concentration aqueous solutions or slurries is the single-cylinder type rotational viscometer Bismetron VS- manufactured by Seiki Laboratory Co., Ltd.
It was measured at a temperature of 50 ° C. using a H1 type. Regarding storage stability, a 450 ml transparent glass bottle containing 400 g of the sample was placed in an air-heated air circulation type thermostatic chamber adjusted to a temperature of 50 ° C., and the change with time after 1 week was observed. The stability was evaluated as follows. The results are shown in Table 1. ◯: Homogeneous liquid without separation Δ: Slightly soft gel-like substance present in lower layer X: Hard gel present in lower layer and separated

Comparative Examples 5 and 6 500 g of the higher alcohol ethoxylate sulfuric acid ester obtained in Example 1 was maintained at 40 ° C. or lower and immediately continuously neutralized with an aqueous sodium hydroxide solution having a predetermined concentration. The results are shown in Table 1.

Comparative Example 7 500 g of the higher alcohol ethoxylate sulfate obtained in Example 1 was maintained at 40 ° C. or lower and immediately continuously neutralized with an aqueous sodium hydroxide solution having a predetermined concentration. Was added and mixed to have a composition shown in Table 1, and sodium hydroxide was also added and mixed to have a composition shown in Table 1. From the results shown in Table 1, the viscosity decreases, but the storage stability deteriorates because the lower layer separates after storage for 1 week.

Examples 8 to 10 Using the same apparatus as in Example 1, under the same conditions, 4 mol of ethylene oxide was added to coconut oil-reduced higher alcohol having an average carbon number of 13 as a higher alcohol ethoxylate in an average addition mole number. The above-mentioned higher alcohol ethoxylates were used, and at the time of neutralization, instead of Na benzoate, Na hydroxyethylenediamine triacetate, Na ethylenediaminetetraacetate and Na citrate were added and mixed to prepare the compositions shown in Table 2. The results are shown in Table 2.

Examples 11 to 13 Using the same apparatus as in Example 1, under the same conditions, an average addition mole of ethylene oxide was added to oxo alcohol (trade name: Dovanol 25) having an average carbon number of 12 to 15 as a higher alcohol ethoxylate. A higher alcohol ethoxylate added by 5 mol was used, and Na malate, Na formate, and Na acetate were added and mixed instead of Na benzoate at the time of neutralization to prepare the compositions shown in Table 2. The results are shown in Table 2.

Examples 14 to 17 Using the same apparatus as in Example 1, under the same conditions, coconut oil-reduced higher alcohol having an average carbon number of 13 as higher alcohol ethoxylate was added with ethylene oxide in an average addition mole number of 1.
The higher alcohol ethoxylate added with 5 mol is used, and instead of Na benzoate at the time of neutralization, Na salicylate, Na sulfosalicylate, Na gluconate, Na benzoate +
The compositions shown in Table 3 were prepared by adding and mixing Na formate. The results are shown in Table 3.

Examples 18 and 19 Using the same apparatus as in Example 1, under the same conditions, an average addition mole of ethylene oxide was added to an oxo alcohol (trade name: Dovanol 23) having an average carbon number of 12 to 13 as a higher alcohol ethoxylate. A higher alcohol ethoxylate with 3 moles added was used. Further, an aqueous solution of triethanolamine was used as a neutralizing agent, and polyethylene glycol, Na benzoate and Na citrate, and polyethylene glycol and Na benzoate were simultaneously added and mixed at the time of neutralization to prepare compositions shown in Table 4. The results are shown in Table 4.

Examples 20 and 21 Using the same apparatus as in Example 1, under the same conditions, 3 moles of ethylene oxide was added to coconut oil-reduced higher alcohol having an average carbon number of 13 as a higher alcohol ethoxylate in average addition mole number. The higher alcohol ethoxylate prepared above was used.
Further, an aqueous ammonia solution was used as a neutralizing agent, and polyethylene glycol and Na benzoate and polyethylene glycol and Na citrate were simultaneously added and mixed at the time of neutralization to prepare the compositions shown in Table 4. The results are shown in Table 4.

Examples 22 to 24, Comparative Examples 25 to 27 Distilled coconut oil alcohol having 12 to 16 carbon atoms (trade name:
Conol 20 L) was sulphated with SO ₃ gas at a reaction molar ratio of 1.0 according to the example to obtain a higher alcohol sulfuric acid ester. 500 g of the obtained higher alcohol sulfate ester was immediately and continuously neutralized with an aqueous sodium hydroxide solution having a predetermined concentration, and at the same time as the neutralization, polyethylene glycol and Na benzoate, polyethylene glycol and Na benzoate and Na formate, and polyethylene glycol were quenched. Add and mix each of the acid Nas and mix under strong stirring for about 40-50
The mixture was stirred at 0 ° C. for 10 minutes to obtain a high-concentration aqueous solution or slurry of higher alcohol sulfate ester salt shown in Table 5. The results are shown in Table 5.

[0024]

[Table 1]Example Comparative example 1 2 3 4 5 6 7 (a) Higher alcohol 35 50 60 63 35 50 60 ethoxylate Sulfate (%) (b) Polyethylene 27 23 15 10 − − 15 Glycol (%) Average molecular weight 500 5000 1000 10000 − − 1000 (c) Ingredient name *¹BA-Na BA-Na BA-Na BA-Na − − − Amount (%) 2.0 4.5 1.0 2.0 Other ingredients: Higher alcohol (%) 1.0 1.2 1.7 1.8 1.0 1.2 1.7 Higher alcohol 1.5 1.8 2.6 2.7 1.5 1.8 2.6 Ethoxylate (%) Alkaline substance name *²NaOH NaOH NaOH NaOH NaOH NaOH NaOH Amount (%) 0.1 0.2 0.2 0.3 0.1 0.2 0.2 Sulfate name *³Na₂SO_FourNa₂SO_FourNa₂SO_FourNa₂SO_FourNa₂SO_FourNa₂SO_FourNa₂SO_Four  Amount (%) 1.0 1.4 1.7 1.8 1.0 1.4 1.7 PEG *^FourMono / 1.8 2.6 3.1 3.2 1.8 2.6 3.1 Disulfate salt (%) *^Five  Average molecular weight of PEG 3000 3000 3000 3000 3000 3000 3000 Dioxane * ⁵ (ppm) 20 28 35 36 20 28 35 Result: Viscosity (50 ℃, centipoise) 27 20 15 18 1200 500 20 Storage stability, 1 week at 50 ℃ ○ ○ ○ ○ × × × * 1) (C) Ingredient name: BA-Na; Na benzoate HEDTA-3Na; Hydroxyethylenediamine triacetate
Acid Na EDTA-4Na; Ethylenediaminetetraacetic acid Na CA-Na; Citrate Na MA-Na; Malate Na PA-Na; Formate Na AcAca; Acetate Na S-Na; Salicylate Na SS-Na; Sulfosalicylic acid Na GA-Na Na gluconate * 2) Alkaline substance name: TEA; Triethanolamine * 3) Sulfate name: TEA sulfate; Triethanolamine sulfate * 4) PEG: Polyethylene glycol * 5) PEG mono / disulfate salt and dioxy
Sun contained in higher alcohol ethoxylate sulphate
It is an impurity.

[0025]

[Table 2] Example 8 9 10 11 12 13 (a) Higher alcohol 55 55 55 60 60 60 Ethoxylate sulfate (%) (b) Polyethylene 15 10 15 10 15 15 Glycol (%) Average molecular weight 1000 3000 5000 1000 1000 1000 (c) Component name * ¹ HEDTA- EDTA- CA-Na MA-Na PA-Na AcANa 3Na 4 Na amount (%) 3.0 3.0 3.0 1.0 0.5 2.0 Other components: Higher alcohol (%) 1.3 1.3 1.3 0.8 0.8 0.8 Higher alcohol 2.0 2.0 2.0 1.2 1.2 1.2 Ethoxylate (%) Alkaline substance name * ² NaOH NaOH NaOH NaOH NaOH NaOH amount (%) 0.1 0.1 0.1 0.15 0.15 0.15 Sulfate name * ³ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Amount (%) 1.0 1.0 1.0 0.6 0.6 0.6 Mono of PEG * ⁴ / 3.0 3.0 3.0 5.0 5.0 5.0 Disulfate salt (%) * ⁵ Average molecular weight of PEG 5000 5000 5000 8000 8000 8000 Dioxane * ⁵ (ppm) 550 550 550 200 200 200 Result: Viscosity (50 ℃, centipoise) 25 23 27 45 40 43 Storage stability, 50 ℃ 1 week ○ ○ ○ ○ ○ O * 1) (C) Component name: BA-Na; Na benzoate HEDTA-3Na; Hydroxyethylenediaminetriacetate Na EDTA-4Na; Ethylenediaminetetraacetic acid Na CA-Na; Citrate Na MA-Na; Malate Na PA- Na; formate Na AcAc Na; acetate Na S-Na; salicylate Na SS-Na; sulfosalicylate Na GA-Na; gluconate Na * 2) Alkaline substance name: TEA; triethanolamine * 3) Sulfate name: sulfate TEA; Triethanolamine sulfate * 4) PEG: polyethylene glycol * 5) PEG mono / disulfate salt and dioxane are Which is an impurity contained in the grade alcohol ethoxylate sulfate.

[0026]

[Table 3]Example 14 15 16 17 (a) Higher alcohol 50 50 50 50Ethoxylate sulfate (%) (b) Polyethylene 20 20 20 20 Glycol (%)Average molecular weight 3000 3000 3000 3000 (c) Ingredient name *¹S-Na SS-Na GA-Na BA-Na Amount (%) 3.0 3.0 3.0 1.0 PA-Na0.01 Other ingredients: Higher alcohol (%) 0.6 0.6 0.6 0.6 Higher alcohol 0.9 0.9 0.9 0.9 Ethoxylate (%) Alkaline substance name *²NaOH NaOH NaOH NaOH Amount (%) 0.1 0.1 0.1 0.1 Sulfate name *³Na₂SO_FourNa₂SO_FourNa₂SO_FourNa₂SO_Four  Amount (%) 0.3 0.3 0.3 0.3 PEG *^FourMono / 2.5 2.5 2.5 2.5 Disulfate salt (%) *^Five  Average molecular weight of PEG 1000 1000 1000 1000Dioxane * ⁵ (ppm) 12 12 12 12 Result: Viscosity (50 ℃, centipoise) 23 22 23 22Storage stability, 50 ° C for 1 week ○ ○ ○ ○  * 1) (C) Ingredient name: BA-Na; Na benzoate HEDTA-3Na; Hydroxyethylenediamine triacetate
Acid Na EDTA-4Na; Ethylenediaminetetraacetic acid Na CA-Na; Citrate Na MA-Na; Malate Na PA-Na; Formate Na AcAca; Acetate Na S-Na; Salicylate Na SS-Na; Sulfosalicylic acid Na GA-Na Na gluconate * 2) Alkaline substance name: TEA; Triethanolamine * 3) Sulfate name: TEA sulfate; Triethanolamine sulfate * 4) PEG: Polyethylene glycol * 5) PEG mono / disulfate salt and dioxy
Sun contained in higher alcohol ethoxylate sulphate
It is an impurity.

[0027]

[Table 4]Example 18 19 20 21 (a) Higher alcohol 60 60 60 60Ethoxylate sulfate (%) (b) Polyethylene 15 15 20 20 Glycol (%)Average molecular weight 2000 2000 1000 1000 (c) Ingredient name *¹BA-Na BA-Na BA-Na CA-Na amount (%) 1.0 2.0 2.0 2.0 CA-Na0.1 Other ingredients: Higher alcohol (%) 0.8 0.8 0.7 0.7 Higher alcohol 1.0 1.0 0.8 0.8 Ethoxylate (%) Alkaline substance name *²TEA TEA NaOH NaOH Amount (%) 0.1 0.1 0.1 0.1 Sulfate name *³Sulfuric acid Sulfuric acid (NH_Four)₂SO_Four(NH_Four)₂SO_Four  TEA TEA amount (%) 0.1 0.1 0.1 0.1 PEG *^FourMono / 4.2 4.2 4.2 4.2 Disulfate salt (%) *^Five  Average molecular weight of PEG 3000 3000 3000 3000Dioxane * ⁵ (ppm) 10 10 15 15 Result: Viscosity (50 ℃, centipoise) 17 18 32 35Storage stability, 50 ° C for 1 week ○ ○ ○ ○  * 1) (C) Ingredient name: BA-Na; Na benzoate HEDTA-3Na; Hydroxyethylenediamine triacetate
Acid Na EDTA-4Na; Ethylenediaminetetraacetic acid Na CA-Na; Citrate Na MA-Na; Malate Na PA-Na; Formate Na AcAca; Acetate Na S-Na; Salicylate Na SS-Na; Sulfosalicylic acid Na GA-Na Na gluconate * 2) Alkaline substance name: TEA; Triethanolamine * 3) Sulfate name: TEA sulfate; Triethanolamine sulfate * 4) PEG: Polyethylene glycol * 5) PEG mono / disulfate salt and dioxy
Sun contained in higher alcohol ethoxylate sulphate
It is an impurity.

[0028]

[Table 5] Example ratio Comparative example 22 23 24 25 26 27 (a) Higher alcohol 35 50 60 35 50 60 Sulfate ester (%) (b) Polyethylene 30 20 15 − − 15 Glycol (%) Average molecular weight 10000 5000 2000 − − 2000 (c) Component name * ¹ BA-Na BA-Na CA-Na − − − 2.0 1.0 4.0 PA-Na content (%) 0.01 Other components: Higher alcohol (%) 1.0 1.4 1.7 1.0 1.4 1.7 Alkaline substance name * ² NaOH NaOH NaOH NaOH NaOH NaOH amount (%) 0.7 1.0 1.5 0.7 1.0 1.5 Sulfate name * ³ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Na ₂ SO ₄ Amount (%) 0.5 0.8 1.0 0.5 0.8 1.0 Result: Viscosity (50 ℃, centipoise) 25 22 30 1500 700 32 Storage stability, 50 ℃ 1 week ○ ○ ○ × × × * 1) (C) Component name: BA- Na; Benzoate Na HEDTA-3Na; Hydroxyethylenediamine triacetate Na EDTA-4Na; Ethylenediaminetetraacetate Na CA-Na; Citrate Na MA-Na; Malate Na PA-Na; Formate Na AcAcNa; Acetate Na SS-Na; Sulfosalicylic acid Na GA-Na; Na gluconate * 2) Alkaline substance name: TEA; Triethanolamine * 3) Sulfate name: Sulfate TEA; Triethanolamine sulfate

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuo Nagai 1-3-7 Main Office, Sumida-ku, Tokyo Inside Lion Corporation

Claims (3)

[Claims] 1. An aqueous surfactant composition in the form of an aqueous solution or a slurry, which comprises the following components (a), (b) and (c). (A) Higher alcohol sulfate ester salt and / or higher alcohol ethoxylate sulfate ester salt having an alcohol carbon chain length of 8 to 20: 30 to 65% by weight, (b) Polyethylene glycol having a weight average molecular weight of 100 to 20,000: 5 -30% by weight, (c) one or two selected from aliphatic polycarboxylic acid salt, benzoic acid salt, benzenecarboxylic acid salt having a substituent, monocarboxylic acid salt having 1 to 3 carbon atoms and gluconate.
One or more compounds: 0.5-5% by weight. 2. The aliphatic polycarboxylic acid salt is hydroxyethylenediamine triacetate, ethylenediamine tetraacetate,
The aqueous surfactant composition according to claim 1, which is selected from citrate and malate, and the benzenecarboxylic acid salt having a nuclear substituent is selected from salicylate and sulfosalicylate. 3. The higher alcohol sulfate ester having an alcohol carbon chain length of 8 to 20 and / or the higher alcohol ethoxylate sulfate ester which is neutralized by adding an alkaline substance thereto. An aqueous surfactant composition and a method for producing the same, wherein the components (b) and (c) are allowed to coexist when an alkaline substance is added when the aqueous surfactant composition is produced.