JPH10152696A - Surfactant composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a surfactant composition having high detergency and excellent handleability by subjecting an alcohol to random addition reaction with ethylene oxide and propylene oxide to give a compound having a specified molecular weight and mixing the compound with water to provide a viscosity below a specified value. SOLUTION: A 10-15C alcohol such as lauryl alcohol is subjected to random addition reaction with ethylene oxide and propylene oxide to give a compound having an average molecular weight of at most 1,000 and represented by formula I [wherein R is a 10-15C alkyl, etc.; EO is oxyethylene; PO is oxypropylene; x1 >1, and x2 >0, provided that x1 +x2 <7.5; and y1 >0, and y2 >0, provided that y1 +y2 =(0.5 to 4.5)]. This compound is mixed with water at a prescribed ratio to give a surfactant composition of which the content of the compound and the content of water satisfy the relations of formula II and formula III [wherein n is alkyl, etc.; y=y1 +y2 ; and C=Wa/(Wa+Wb)×100 (wherein Wa is the content of the compound, and Wb is the content of water)] and which has a viscosity (25 deg.C) of at most 1,000cP. The addition of an anionic surfactant, etc., to this composition can further improve the detergency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a surfactant composition, and more particularly, to a surfactant composition containing a specific nonionic surfactant as a surfactant component, which is useful as a household and industrial detergent. The present invention relates to a surfactant composition having detergency, excellent handling properties, and low flammability and odor.

[0002]

2. Description of the Related Art In recent years, household and industrial cleaning agents have been required to be blended at a higher concentration from the viewpoint of energy saving, resource saving and waste container reduction during production and transportation. In such a surfactant composition, a nonionic surfactant is used as a main base because of its excellent detergency. However, as the content of the nonionic surfactant in the detergent increases, the viscosity of the detergent formulation suddenly increases and decreases due to a slight difference in the blending concentration. However, there is a problem that a very high-precision weighing is required and that the viscosity is hardly stabilized during storage of the composition.

As a technique for incorporating a nonionic surfactant in a detergent at a high concentration, a technique of adding a large amount of a lower alcohol solvent such as ethanol or isopropanol (US Pat. No. 3,953,380), a specific polyoxyalkylene alkyl Technology using ether (JP-A-8-6053)
No. 2), a technique of adding a specific solvent to a specific polyoxyalkylene alkyl ether (Japanese Patent Application Laid-Open No. 8-157678).
No.) has been proposed.

[0004] However, the method of adding a large amount of a lower alcohol solvent has a problem in that the risk of ignition of the compound is increased and odor is generated, and the method described in JP-A-8-60532 has a high viscosity and is not always satisfactory. . Further, a method using a specific solvent (Japanese Patent Laid-Open No. 8-157678)
Also), it is necessary to add a large amount of components that do not contribute to cleaning, resulting in an increase in cost.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a surfactant composition which has high detergency, excellent handling properties, can easily maintain a constant product viscosity, and has low risk of ignition and odor. Is to provide.

[0006]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a surfactant composition containing a polyoxyalkylene type nonionic surfactant having a specific addition form and water at a specific mixing ratio. The inventor has found that an object can solve the above problems, and has completed the present invention.

That is, the present invention comprises a compound represented by the following general formula (1) and having an average molecular weight of 1000 or less and water, and the content of the compound represented by the formula (1) in the composition and water The content satisfies the following formulas (2) and (3), and the number of carbon atoms in the composition is 2-3.
A surfactant composition characterized by having an alcohol content of not more than 10% by weight of a water content and a viscosity at 25 ° C. of not more than 1000 cp.

RO- (EOx ₁ / POy ₁ )-(EOx ₂ / POy ₂ ) -H (1) wherein R is a linear or branched alkyl or alkenyl group having 10 to 15 carbon atoms. , EO is an oxyethylene group,
PO represents an oxypropylene group. x ₁ and x ₂ represent an average addition mole number of ethylene oxide, x ₁ is 1 or more, x ₂ is 0
The number of more, the sum of x ₁ and x ₂ is 7.5 or more. y ₁ and y ₂ represent the average number of moles of propylene oxide added, and y ₁ is 0
As described above, y ₂ is a number smaller than x ₁ and y ₂ is 0 or more, and the sum of y ₁ and y ₂ is 0.5 to 4.5. Incidentally, (EOx _i / POy _i) indicates that the ethylene oxide x _i mol and propylene oxide y _i mol is added in a random _{form, (EOx 1 / POy 1)} - (EOx 2 / PO
y ₂ ) indicates that (EOx ₁ / POy ₁ ) and (EOx ₂ / POy ₂ ) are added in a block shape. 50 ≦ C ≦ 90 (2) C ≧ [10 (n−y) −38] (3) [In the above formulas (2) and (3), C is a formula

[0009]

(Equation 2)

(Wa represents the content (wt%) of the compound represented by the general formula (1) in the composition, and Wb represents the water content (wt%) of the composition). Where n is a general formula
Carbon number of the alkyl or alkenyl group represented by R in (1), y is y ₁ + y ₂ (y ₁ and y ₂ have the same meanings as above)
Is shown. ]

[0011]

Embodiments of the present invention will be described below in detail.

The compound represented by the general formula (1) and having an average molecular weight of 1000 or less, which is used in the present invention, is represented by the general formula (4) R-OH (4) (wherein R has the same meaning as described above). Can be obtained by adding ethylene oxide and propylene oxide to the alcohol represented by the formula in a specific addition form.

The alcohol represented by the general formula (4) includes a saturated or unsaturated primary or secondary linear or branched chain alcohol having 10 to 15 carbon atoms. Are straight-chain alcohols such as decyl alcohol, lauryl alcohol, and myristyl alcohol (manufactured by Kao Corporation, trade names "Calcol 1095", "Calcol 20").
98 "and" Calcol 4098 "), a mixed alcohol (Calcol 2474" manufactured by Kao Corporation) mixed in the range of 10 to 15 carbon atoms, and synthesized using the oxo method or the Ziegler method. Alcohol having 10 to 15 carbon atoms with branches (manufactured by Kyowa Hakko Co., Ltd., trade name "Oxocol 1213",
"Decanol" and "Tridecanol", manufactured by Mitsubishi Chemical Corporation, trade names "Dovanol 23", "Dovanol 25"
And "Diadoll 115H", manufactured by Shell Chemical Co., Ltd., trade names "Neodol 23", "Neodol 25", "Neodol 1" and the like.

The average carbon number of the alcohol, that is, the carbon number of R in the general formula (1) is from 10 to 15, preferably from 12 to 14. If the number of carbon atoms in R 1 is less than 10 or more than 15, the detergency is undesirably reduced.

As a method of adding an alkylene oxide to these alcohols, there is a method of sequentially adding an alkylene oxide in the presence of a catalyst using a known alkoxylation method. The catalyst used for this alkoxylation may be either an acid catalyst or a base catalyst. Further, MgO-ZnO, MgO-SnO, MgO-TiO described in JP-A-7-227540.
₂ , catalysts such as MgO-SbO, which provide a narrow alkylene oxide addition distribution (narrow range);
Synthesis can also be performed using a catalyst that selectively gives a narrow distribution of alkylene oxides, such as a similar Mg-based catalyst described in No. 437.

The addition form of the alkylene oxide in the present invention is represented by the general formula (1). More specifically, the propylene oxide is added to the alcohol represented by the general formula (4), and then the propylene oxide is added. Added expression
(1-1) RO-EOx ₁ -POy ₂ -H (1-1) (Addition of a block represented by the general formula (1) in which y ₂ is not 0 and y ₁ = x ₂ = 0) Formula (1-2) RO- (EOx ₁ / POy ₁ ) -H (1-2) (Formula (1-2)) in which ethylene oxide and propylene oxide are randomly added to an alcohol represented by the general formula (4). 1), wherein y ₁ is not 0 and x ₂ = y ₂ = 0), and a combination of a random addition product and a block addition of a single alkylene oxide represented by the following formula (1− 3) to (1-5) RO- (EOx ₁ / POy ₁ ) -POy ₂ -H (1-3) (In the general formula (1), y ₁ and y ₂ are not 0 and x ₂ = 0 RO- (EOx ₁ / POy ₁ ) -EOx ₂ -H (1-4) (In general formula (1), y ₁ and x ₂ are not 0 and y ₂ = 0) RO-EOx ₁ - (in the general formula (1), instead of the x ₂ and y ₂ is 0, that of _{y 1 = 0) (EOx 2} / POy 2) -H (1-5) a compound represented by, ethyl Combining different random addition of mixed ratio of alkylene oxide and propylene oxide, formula _{(1-6) RO- (EOx 1 /} POy 1) - (EOx 2 / POy 2) -H (1-6) ( general formula ( in 1), a compound represented by y _1, x _2, those y ₂ is not both 0) are exemplified.

The compound represented by the general formula (1) of the present invention must satisfy x ₁ > y ₁ . x ₁ ≦ y _1, that is, RO
When the PO ratio of the oxyalkylene group directly linked to is higher than the EO ratio, the viscosity of the composition increases, and the handleability decreases.

The compound represented by the general formula (1) has a total addition mole number (x ₁ + x ₂ ) of ethylene oxide of 7.5 or more;
When x ₁ + x ₂ is from 8 to 12, it is particularly preferable because of excellent cleaning properties. If x ₁ + x ₂ is less than 7.5, the cleaning power is greatly reduced.

The total mole number of the propylene oxide added to the compound represented by the general formula (1) (y ₁ + y ₂ ) is 0.5 mol or more.
5 mol or less. When y ₁ + y ₂ is less than 0.5 mol, the viscosity and the concentration dependency of the viscosity (viscosity change rate) are large, and y ₁ + y ₂
If it exceeds 4.5, the cleaning power will decrease. When the total number of moles of propylene oxide satisfies 1.5 ≦ (y ₁ + y ₂ ) ≦ 4.0, the viscosity behavior and the detergency are particularly excellent and preferred.

The average molecular weight of the compound represented by the general formula (1) needs to be 1000 or less, preferably 850 or less. If the average molecular weight exceeds 1000, the detergency will decrease,
The viscosity of the formulation increases.

In the surfactant composition of the present invention, the group represented by R in the compound represented by the above general formula (1) and / or
Alternatively, they may contain a mixture of different oxyalkylene groups with different numbers of moles added, and the number average of these may be within the range of the present invention.

The content of the compound represented by formula (1) and the content of water in the surfactant composition of the present invention are determined by the above formula (2) and
(3) must be satisfied. If the value of C is less than 50,
The concentration dependency (viscosity change rate) of the viscosity of the composition tends to increase, and the merit of increasing the concentration is small. The value of C is preferably 65 or more. On the other hand, when the value of C exceeds 90, the concentration of the viscosity of the composition is highly dependent, the low-temperature stability of the surfactant composition is poor, and a precipitate is deposited. Further, when the value of C does not satisfy the above formula (3), the viscosity of the composition becomes high. More preferably, the value of C satisfies the following expression (3 ′).

C ≧ [10 (n−y) −35] (3 ′) (wherein C, n and y have the same meanings as above.) The alcohol having 2 to 3 carbon atoms in the composition of the present invention. Is 10% by weight or less, preferably 8% by weight or less, based on the water content. When the content of alcohol having 2 to 3 carbon atoms is 10
If the content is more than 100% by weight, the flash point falls below 100 ℃ and the danger increases.

The viscosity of the surfactant composition of the present invention is 25 ° C.
Must be less than 1000cp. If it exceeds 1000 cp, a high viscosity compatible pump is required or handling is difficult. Particularly preferably, it is 300 cp or less.

The surfactant composition of the present invention contains other nonionic activators, anionic activators, cationic activators, amphoteric activators, chelating agents, bactericides and the like as long as the effects of the present invention are not impaired. In order to finely adjust the properties of the surfactant composition to be produced, a viscosity modifier such as a thickener or a viscosity reducer may be added.

Examples of other nonionic surfactants incorporated in the surfactant composition of the present invention include amine oxides and polyalkylene glycol alkyl ethers other than the compound represented by the above general formula (1). And the like,
Examples of the anionic surfactant include alkane sulfonates, alkylbenzene sulfonates, α-olefin sulfonates, alkyl sulfates, alkyl ether sulfates, α-sulfo fatty acid salts, higher fatty acid salts, and the like. Examples thereof include aliphatic amine salts and quaternary ammonium salts, and examples of the amphoteric activators include betaines, sulfobetaines, and amino acid salts. Examples of the chelating agent include sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, and sodium polyacrylate, and examples of the disinfectant include benzalkonium chloride.

In particular, in the surfactant composition of the present invention,
The addition of an anionic activator is preferred for improving detergency. The anionic activator is preferably added at a ratio of the compound represented by the general formula (1) / anionic activator = 50/50 to 99/1 (weight ratio), but the weight ratio is 70/30 to 95/95. /
The case of 5 is preferable because a higher viscosity and a higher detergency can be obtained.

[0028]

EXAMPLES Next, the present invention will be described in more detail with reference to Synthesis Examples of nonionic surfactants and Examples of the surfactant composition of the present invention. However, the present invention is not limited to these Examples. Absent.

The average molecular weight of the nonionic surfactant was measured by the following method. That is, the hydroxyl value of the synthesized nonionic surfactant was determined by a neutralization titration method according to JIS K0070, and the average molecular weight was determined from the obtained hydroxyl value according to the following equation.

[0030]

(Equation 3)

Synthesis Example 1 Synthesis of Compound Represented by Formula C ₁₂ H ₂₅ -O- (EO) _10- (PO) ₄ -H 5 liters with two measuring tanks for ethylene oxide and propylene oxide Lauryl alcohol (trade name: Calcol 2098,
After 500 g of Kao Corporation and 3.0 g of potassium hydroxide were charged and purged with nitrogen, the temperature was raised to 110 ° C, and the pressure was increased to 1 at 40 Torr.
Dehydration was performed for hours. Next, the temperature was raised to 150 ° C., and 1184 g of ethylene oxide was introduced into the autoclave at a pressure of 3.5 kg / cm ² , and the reaction was continued until the pressure was reduced to a constant level. Next, the temperature of the reaction product was cooled to 120 ° C., and 624 g of propylene oxide was introduced into the autoclave at a pressure of 3.5 kg / cm ² , and the reaction was continued until the pressure decreased and became constant. After completion of the reaction, the mixture was cooled and the product was extracted to obtain about 2.3 kg of the desired compound (average molecular weight: 858).

Synthesis Example 2 Synthesis of Compound Represented by Formula C ₁₂ H ₂₅ -O- (EO ₁₀ / PO ₄ ) -H The same amounts of lauryl alcohol and potassium hydroxide as in Synthesis Example 1 were charged. After performing temperature rise dehydration by the same procedure,
1184g ethylene oxide and 624 propylene oxide
g was previously mixed in a measuring tank, and the alkylene oxide mixture obtained was introduced into the autoclave at 135 ° C. and a pressure of 3.5 kg / cm ² . Perform the reaction until the pressure drops and becomes constant,
After completion of the reaction, the mixture was cooled and the product was extracted to obtain about 2.3 kg of the desired compound (average molecular weight: 858).

Synthesis Example 3 Synthesis of Compound Represented by Formula C ₁₂ H ₂₅ -O- (EO) _10- (PO) ₂ -H The procedure was the same as in Synthesis Example 1 except that the amount of propylene oxide added was 312 g. The target compound (average molecular weight 74
2) About 2 kg was obtained.

Synthesis Example 4 Synthesis of Compound Represented by Formula C ₁₂ H ₂₅ —O— (EO ₁₀ / PO ₂ ) —H Except that the amount of propylene oxide added was 312 g, the procedure was the same as in Synthesis Example 2. Target compound (average molecular weight 74
2) About 2 kg was obtained.

Synthesis Example 5 Synthesis of Compound Represented by Formula C ₁₂ H ₂₅ -O- (EO ₆ / PO ₂ )-(EO) ₅ -H Two measuring tanks for ethylene oxide and propylene oxide were provided. Lauryl alcohol (trade name: Calcol 2098, trade name) was placed in a 5-liter rotary stirring type autoclave.
After 500 g of Kao Corporation and 3.0 g of potassium hydroxide were charged and purged with nitrogen, the temperature was raised to 110 ° C, and the pressure was increased to 1 at 40 Torr.
Dehydration was performed for hours. Next, a mixture consisting of 710 g of ethylene oxide and 312 g of propylene oxide was heated at 135 ° C.
It was introduced into the autoclave at a pressure of 3.5 kg / cm ² , and the reaction was carried out until the pressure dropped and became constant. Subsequently, 592 g of ethylene oxide was introduced into the autoclave at 150 ° C. and a pressure of 3.5 kg / cm ² , and the reaction was carried out until the pressure decreased and became constant. After completion of the reaction, the product was taken out by cooling, and about 2.1 kg of a target compound (average molecular weight: 786) was obtained.

Synthesis Example 6 Synthesis of Compound _{Represented by} Formula C _12-14 H _25-29 -O- (EO ₁₀ / PO ₂ ) -H A mixture of lauryl alcohol and myristyl alcohol in place of 500 g of lauryl alcohol of Synthesis Example 4. Using 522 g of (trade name: Calcol 2474, manufactured by Kao Corporation, hydroxyl value: 289), about 2 kg of the desired compound (average molecular weight: 756) was obtained.

Synthesis Example 7 Synthesis of Compound Represented by Formula C _12-13 H _25-27 -O- (EO ₁₀ / PO ₂ ) -H The number of carbon atoms in place of 500 g of lauryl alcohol of Synthesis Example 4
Using 533 g of 12-13 oxo alcohol (trade name: Dovanol 23, manufactured by Mitsubishi Chemical Corporation, hydroxyl value: 283), about 2 kg of the desired compound (average molecular weight: 749) was obtained.

[0038] Synthesis Example 8 Formula _{C 12 H 25 -O- (PO)} 4 - (EO) a compound represented by the ₁₀ -H addition of synthetic propylene oxide and ethylene oxide (comparative compound), the order of the reaction in the opposite In the same manner as in Synthesis Example 1 except that the above procedure was repeated, about 2.3 kg of the desired compound (average molecular weight: 858) was obtained.

Synthesis Example 9 Synthesis of Compound (Comparative Compound) Represented by Formula C ₁₂ H ₂₅ -O- (EO ₁₅ / PO ₄ ) -H Synthesis Example 2 was the same as Synthesis Example 2 except that the amount of ethylene oxide added was changed to 1775 g. In the same manner as in Example 2, about 2.9 kg of the desired compound (average molecular weight: 1078) was obtained.

[0040] Synthesis Example 10 Formula _{C 12 H 25 -O- (EO)} 7 - (PO) 2 compounds represented by -H except that the 829g of ethylene oxide addition amount of Synthesis Example 3 (comparative compound) Approximately 1.6 kg of the target compound (average molecular weight: 610) was obtained in exactly the same manner as in Synthesis Example 3.

Synthesis Example 11 Synthesis of Compound (Comparative Compound) Represented by Formula C ₁₂ H ₂₅ -O- (EO ₁₀ / PO ₆ ) -H Synthesis Example 2 except that the amount of propylene oxide added was 936 g. Approximately 2.6 kg of the desired compound (average molecular weight: 974) was obtained in exactly the same manner as in 2.

Examples 1 to 7 and Comparative Examples 1 to 9 Nonionic surfactants and water shown in Table 1 were blended in the proportions shown in Table 1 to prepare surfactant compositions. The handling property, viscosity stability and detergency of the obtained surfactant composition were evaluated by the following methods. Table 1 shows the results.

<Evaluation of Handling Properties and Viscosity Stability> The viscosity of each surfactant composition at 25 ° C. was measured using an E-type viscometer (VISCONIC-EMD, manufactured by Toki Sangyo Co., Ltd.). The evaluation criteria of the handling property are as follows: ◎: 300 cp or less, 1000 cp or less: 300, cp
Those that exceeded と し た were evaluated as ×.

The viscosity change rate Δη was defined according to the following formula, and the concentration dependence of the viscosity (viscosity stability) was evaluated based on the following criteria.

[0045]

(Equation 4)

(Where η ₁ denotes the viscosity at 25 ° C. at a concentration of C%, and η ₂ denotes the viscosity at 25 ° C. at a concentration of (C + 1)%.
C has the above-mentioned meaning. The evaluation criteria of the viscosity stability were as follows: 、 ３: 3 or less, ◎: More than 3, 5 or less: ×: More than 5,

<Evaluation Method of Detergency> (1) Preparation of sebum soiled cloth 2 g of a model sebum soil having the following composition was uniformly applied to a 10 × 10 cm cotton cloth to prepare a sebum soiled cloth (artificial soiled cloth). Created.

* Model sebum soil composition Cotton seed oil 60% by weight Oleic acid 10% by weight Palmitic acid 10% by weight Liquid and solid paraffin 10% by weight (2) Washing conditions and evaluation method 10 × 10 cm sebum soil per liter of detergent aqueous solution for evaluation Put 5 stained cloths (artificially stained cloths) and measure with a targotometer.
Washing was performed at 0 rpm under the following conditions. The washing conditions are as follows.

* Washing conditions Washing time 10 minutes Detergent concentration (as effective surfactant) 0.03% by weight Water hardness 4 ° DH Water temperature 20 ° C. Rinse with tap water 5 minutes The reflectance at 550 nm of the contaminated cloth before and after was measured using a self-recording colorimeter (Z-300 manufactured by Nippon Denshoku Co., Ltd.).
A), and the cleaning rate (%) was determined by the following equation (the measured average cleaning rate of five sheets is shown in the table).

[0050]

(Equation 5)

[0051]

[Table 1]

As is clear from Table 1, the surfactant compositions of the present invention (Examples 1 to 7) are excellent in both handling properties and viscosity stability. On the other hand, those having a C value outside the range of the present invention (Comparative Examples 1 to 3), those having a viscosity outside the range of the present invention (Comparative Example 4), and nonionic surfactants outside the range of the present invention (Comparative Examples 5 and 5) 6) had a problem in handling properties or viscosity stability.

Although the surfactant compositions of the present invention (Examples 1 to 7) all give high cleaning rates, Comparative Examples 7 to 9 using nonionic surfactants outside the scope of the present invention. Had poor cleaning properties.

Examples 8 to 9 and Comparative Examples 10 to 12 Nonionic surfactants and water shown in Table 2 were blended in the proportions shown in Table 2 to prepare surfactant compositions. The obtained surfactant composition was evaluated for handleability and viscosity stability in the same manner as in Example 1, and flammability was evaluated by the following method. Table 2 shows the results.

<Evaluation method of flammability> The flammability was measured by a tag-closed flash point measuring device (measurement temperature; room temperature to 95%).
° C). A composition which caused a flash and whose flash point could be measured was judged to have a high risk of ignition.

[0056]

[Table 2]

As is clear from Table 2, the surfactant compositions of the present invention are excellent in handling properties, viscosity stability and inflammability, whereas the surfactant compositions of Comparative Examples 10 to 12 are Inflammability or handling properties (viscosity) were poor.

Examples 10 to 15 and Comparative Examples 13 to 14 The surfactants having the compositions shown in Table 3 were evaluated for handling properties, viscosity stability and detergency in the same manner as in Example 1. Table 4 shows the results.

[0059]

[Table 3]

Note) * 1: Latemul PS (manufactured by Kao Corporation) * 2: KS soap (manufactured by Kao Corporation) * 3: R base composition C ₁₂ H ₂₅ / C ₁₄ H ₂₅ = 70/30 (mol) * 4: Emal 0 (manufactured by Kao Corporation) * 5: Neoperex F-65 (manufactured by Kao Corporation)

[0061]

[Table 4]

[0062]

The surfactant composition of the present invention has a high detergency, is excellent in handleability in a high concentration region, can keep the properties of the product constant, and can be added with a small amount of solvent. Therefore, there is little danger such as ignition and smell. In addition, it can be easily mixed with various cleaning auxiliary components without requiring special operations in its formulation, and is suitable for kitchen detergents, residential detergents, bathroom detergents, detergents for clothing, etc., and fibers for industrial use It is a very useful surfactant composition that can also be used as a scouring agent, a polymerization emulsifier, a metal degreaser, a detergent for electronic components, a dispersant, and a solubilizer.

Claims (4)

[Claims] An average molecular weight of 10 represented by the following general formula (1):
Contains the following compound and water, the content of the compound represented by the formula (1) in the composition and the content of water are represented by the following formula (2) and
(3) the interface, wherein the content of the alcohol having 2 to 3 carbon atoms in the composition is 10% by weight or less of the water content and the viscosity at 25 ° C. is 1000 cp or less. Activator composition. RO- (EOx ₁ / POy ₁ )-(EOx ₂ / POy ₂ ) -H (1) wherein R represents a linear or branched alkyl or alkenyl group having 10 to 15 carbon atoms, and EO represents Oxyethylene group,
PO represents an oxypropylene group. x ₁ and x ₂ represent an average addition mole number of ethylene oxide, x ₁ is 1 or more, x ₂ is 0
The number of more, the sum of x ₁ and x ₂ is 7.5 or more. y ₁ and y ₂ represent the average number of moles of propylene oxide added, and y ₁ is 0
As described above, y ₂ is a number smaller than x ₁ and y ₂ is 0 or more, and the sum of y ₁ and y ₂ is 0.5 to 4.5. Incidentally, (EOx _i / POy _i) indicates that the ethylene oxide x _i mol and propylene oxide y _i mol is added in a random _{form, (EOx 1 / POy 1)} - (EOx 2 / PO
y ₂ ) indicates that (EOx ₁ / POy ₁ ) and (EOx ₂ / POy ₂ ) are added in a block shape. 50 ≦ C ≦ 90 (2) C ≧ [10 (n−y) −38] (3) [In the above formulas (2) and (3), C is a formula: (Wa indicates the content (wt%) of the compound represented by the general formula (1) in the composition, and Wb indicates the content (wt%) of water in the composition.) , N is R in general formula (1)
The carbon number of the alkyl group or alkenyl group represented by
y ₁ + y ₂ (y ₁ and y ₂ have the above meanings). ] 2. The surfactant composition according to claim 1, wherein the value of C satisfies the following formula (3 ′). C ≧ [10 (n−y) −35] (3 ′) (wherein C, n and y have the same meanings as above.) 3. In the general formula (1), the sum of y ₁ and y ₂ is 1.5
The surfactant composition according to claim 1, wherein the surfactant composition is from 4.0 to 4.0. 4. An anionic activator comprising a compound represented by the general formula (1) / anionic activator = 50/50 to 99/1 (weight ratio).
The surfactant composition according to any one of claims 1 to 3, wherein the surfactant composition is contained at a ratio of: