JPWO2006009203A1 - Scouring agent composition for fibers - Google Patents

Abstract

The scouring composition for fibers of the present invention is an anionic surfactant obtained by anionizing an alkylene oxide adduct of an aliphatic secondary alcohol having 8 to 18 carbon atoms and/or a branched aliphatic alcohol having 8 to 18 carbon atoms ( AA-1) and/or an anionic surfactant (AN-1) obtained by anionizing an alkylene oxide adduct of an aliphatic amine having 8 to 18 carbon atoms, and a nonionic surfactant (B), Nonvolatile of (AA-1) and/or (AN-1) with respect to the total weight of nonvolatiles of these anionic surfactants (AA-1) and/or (AN-1) and nonionic surfactants (B). The partial weight is 5 to 60% by weight, and the nonvolatile content weight of (B) is 40 to 95% by weight. As a result, it is possible to provide a scouring agent for fibers, which can improve the scouring property without any problem in the permeability and the combined stability of the cotton yarn or the polyester/cotton mixed-spinning high-density fabric treated under the high-concentration alkaline condition. it can.

Description

  The present invention relates to a fiber scouring agent composition, and more particularly to a fiber scouring agent composition used in a fiber scouring step.

  Conventionally, resins and waxes have been used for natural fibers, especially cellulosic fibers, and woven fabrics woven from fibers have sizing agents such as acrylic ester resin, polyvinyl alcohol, starch, and wax. Since they exist as impurities, they are subjected to a scouring treatment to remove them. The scouring treatment method is roughly classified into a batch system and a continuous system depending on the system for supplying the fiber product to the scouring machine. The scouring machine is mainly composed of a processing tank (particularly, a processing tank mainly called a saturator in the continuous system), a squeezing roller and a steamer box having multi-stage rolls. For example, in the continuous refining treatment, a saturator is filled with an alkaline aqueous solution (hereinafter, referred to as a treatment liquid) containing a refining agent, a chelating agent, etc., and a textile product is dipped in the saturator and passed through a squeezing roller and a steamer box in that order. It is done by As a result, impurities are removed together with the treatment liquid.

Usually, in a high-density fabric made of cotton yarn and polyester/cotton mixed yarn, the amount of the sizing agent attached is large, and therefore the alkali concentration is increased to be treated. The alkali concentration is generally 10 g/L to 40 g/L in terms of solid content of sodium hydroxide, but it may be 40 g/L to 100 g/L depending on the amount of sizing agent attached to the woven fabric. However, if the alkali concentration is increased in this way, the stability of the combined use with the scouring agent becomes poor, resulting in cloudiness and separation. Also, the permeability is very hindered. On the other hand, even when a refining agent having high stability in combination with a high-concentration alkali is used, the permeability is extremely deteriorated. On the contrary, even if a scouring agent having a high permeability is used in a high-concentration alkaline bath, it causes clouding and separation.
Therefore, in order to solve this problem, it is necessary to develop a new anionic surfactant capable of satisfying the required characteristics of trade-off relationship.

As a recent example, Japanese Patent Application Laid-Open No. 6-200471 discloses that a carboxymethylated product of an alkyl polyether is highly alkaline, does not become cloudy, and has excellent scouring properties. However, the balance between alkali resistance and penetration is not sufficient.
Further, Japanese Patent Laid-Open No. 2001-3263 discloses a fiber scouring agent in which a specific nonionic surfactant and an anionic surfactant are used in combination. Are better. However, the compounding ratio of carboxylic acid (salt) and phosphoric acid ester (salt), which are exemplified as anionic surfactants, is low, and the high-density woven fabric of cotton yarn and polyester/cotton blended yarn has alkali resistance at high alkali concentration. And the permeability is not sufficient.
JP-A-6-200471 JP, 2001-3263, A

  An object of the present invention is to provide a scouring agent composition for fibers which has good permeability and combined use stability even when treated under a high-concentration alkaline condition and which can improve scouring properties.

The present inventors combined a specific anionic surfactant (AA) and/or anionic surfactant (AN) with a nonionic surfactant (B) so that the polishing liquid can be separated even in a high-concentration alkali. The present inventors have completed the present invention by discovering that the stability can be maintained without being separated, and that the permeability and the scouring property are good.
That is, the scouring composition for fibers of the present invention is an anionic surfactant obtained by anionizing an alkylene oxide adduct of an aliphatic secondary alcohol having 8 to 18 carbon atoms and/or a branched aliphatic alcohol having 8 to 18 carbon atoms. (AA-1) and/or an anionic surfactant (AN-1) obtained by anionizing an alkylene oxide adduct of an aliphatic amine having 8 to 18 carbon atoms, and a nonionic surfactant (B) Of the anionic surfactant (AA-1) and/or (AN-1) and the nonionic surfactant (B) with respect to the total nonvolatile content of (AA-1) and/or (AN-1). The nonvolatile content weight is 5 to 60% by weight, and the nonvolatile content weight of (B) is 40 to 95% by weight.

  The second fiber scouring composition of the present invention has one end blocked with an aliphatic secondary alkoxy group having 8 to 18 carbon atoms and/or an aliphatic alkoxy group having a branched structure having 8 to 18 carbon atoms. An anionic surfactant (AA-2) containing a (poly)alkylene oxide structural unit and/or a (poly)alkylene oxide structural unit having one end blocked with an amino group, and one of the substituents of the amino group is It contains an anionic surfactant (AN-2) which is an aliphatic hydrocarbon group having 8 to 18 carbon atoms and a nonionic surfactant (B), and these anionic surfactants (AA-2) and/or (AN -2) and 5 to 60% by weight of non-volatile content of (AA-2) and/or (AN-2) with respect to the total non-volatile content of nonionic surfactant (B), and non-volatile content of (B) The weight is 40 to 95% by weight.

Effect of the present invention

  According to the present invention, it is possible to supply a fiber scouring agent composition having good alkali resistance, permeability, re-wetting property and scouring property.

Examples of the anionic surfactant (AA) used in the fiber scouring composition of the present invention include:
(1) A product obtained by anionizing an alkylene oxide adduct of a C _8-18 aliphatic secondary alcohol (AA-1a),
(2) A product obtained by anionizing an alkylene oxide adduct of a C _8-18 branched aliphatic alcohol (AA-1b),
(3) a C _8-18 aliphatic secondary alkoxy group containing a (poly)alkylene oxide structural unit having one end blocked (AA-2a),
(4) _C8-18 branched aliphatic alkoxy group-containing (poly)alkylene oxide structural unit having one end blocked (AA-2b)
Etc.
In addition, in the present invention, “the one end is blocked” means that a predetermined substituent is bonded to the one end.

As such an anionic surfactant (AA), those represented by the formula (1) or the formula (2) are preferable because they are excellent in alkali resistance and permeability.
R ¹ O(AO) _n (CH ₂ ) _p COOM (1)
[R ¹ O(AO) _n ] _q PO _4-q M _3-q (2)
(In the formula, R ¹ together with an adjacent oxygen atom form an aliphatic secondary alkoxy group having 8 to 18 carbon atoms and/or an aliphatic alkoxy group having a branched structure having 8 to 18 carbon atoms, and AO is ethylene. Represents at least one kind of alkylene oxide group selected from an oxide group (EO) and a propylene oxide group (PO), which may constitute a block adduct, an alternating adduct or a random adduct, and M is Hydrogen atom or alkaline group, n is an integer of 1 to 50, p is an integer of 1 to 3, and q is 1 or 2.)
Here, the alkaline group is an atom or molecule that ionizes and exhibits alkalinity, and examples thereof include an alkali metal, an alkaline earth metal and a quaternary ammonium group.

Further, as the anionic surfactant (AN), for example,
(5) A product obtained by anionizing an alkylene oxide adduct of a C _8-18 aliphatic amine (AN-1) and (6) a (poly)alkylene oxide structural unit having one end blocked with an amino group. And those in which one of the substituents of the amino group is a C _8-18 aliphatic hydrocarbon group (AN-2).

As such an anionic surfactant (AN), one represented by the formula (3) is preferable because it has excellent alkali resistance.
R ² N[(AO) _m (CH ₂ ) _p COOM][(AO) _n X] (3)
(In the formula, R ² represents an aliphatic hydrocarbon group having 8 to 18 carbon atoms, X is a (CH ₂ ) _p COOM group or a hydrogen atom, m is an integer of 1 to 50, AO, M, n And p are as defined above)

  The anionic surfactant (AA) of the present invention has an aliphatic group having 8 to 18 carbon atoms in its molecule, and preferably has an aliphatic group having 8 to 12 carbon atoms or 10 to 12 carbon atoms. is doing. Here, the aliphatic group constitutes an aliphatic secondary alcohol, a branched aliphatic alcohol, an aliphatic secondary alkoxy group, or a branched aliphatic alkoxy group. The anionic surfactant (AN) has an aliphatic group having 8 to 18 carbon atoms in its molecule, and preferably has an aliphatic group having 12 to 16 carbon atoms. Here, the aliphatic group constitutes an aliphatic amine or an aliphatic hydrocarbon group.

  Specific examples of the aliphatic group include n-octyl, 2-ethylhexyl, n-nonyl, n-decyl, isodecyl, n-undecyl, n-dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl and the like. . Among them, those forming an alcohol or alkoxy group having a secondary or branched structure are preferable in terms of excellent permeability and biodegradability. In particular, examples of the anionic surfactant (AN) include those forming laurylamine and stearylamine. The aliphatic group here may be linear or branched, and may have any structure from a primary to a tertiary, but a secondary or branched amine in view of excellent permeability and biodegradability. Those which form are preferred.

  The number of carbon atoms in the alkylene oxide is not particularly limited, but for example, an ethylene oxide group (EO) and/or a propylene oxide group (PO) is preferable. Further, the alkylene oxide may form any of a block adduct, an alternating adduct and a random adduct. The addition mole number of alkylene oxide may be 1 to 50, preferably 1 to 20 moles added, and more preferably 2 to 10 moles added.

The anionization of the anionic surfactants (AA-1) and (AN-1) may be either a phosphate type anion or a carboxylate anion. However, the carboxylate anion is preferable in consideration of the phosphorus regulation for the purpose of reducing the drainage load these days.
The anionic surfactant may be used alone or as a mixture of two or more kinds. In this case, their mixing ratio is not particularly limited.

Particularly, in the present invention, as the compound of the formula (1), nonionic non-adduct of ethylene oxide (3 to 7 moles) of aliphatic alcohol branched with 10 to 12 carbon atoms is preferable because it is particularly excellent in alkali resistance and permeability. An anionic surfactant obtained by etherifying a surfactant with ether carboxy (salt), or R ¹ is an aliphatic hydrocarbon branched with 10 to 12 carbon atoms, AO is an ethylene oxide group, and n=3 to Anionic surfactants with 7 and p=2 are preferred.

In addition, in the present invention, as the compound of the formula (2), a nonionic surfactant of ethylene oxide 3 to 7 mol adduct of aliphatic alcohol having 10 to 12 carbon atoms is converted into a phosphate ester (salt). The anionic surfactant obtained as described above, or an anionic surfactant in which R ¹ is an aliphatic hydrocarbon branched with 10 to 12 carbon atoms, AO is an ethylene oxide group, and n=3 to 7, is preferable.

Further, in the present invention, as the compound of formula (3), R ² is an aliphatic hydrocarbon having 12 to 16 carbon atoms, AO is an ethylene oxide group, an anion activator having n=2 to 10 or carbon. Anion activators obtained by etherification (salt) of nonionic activators of ethylene oxide 2-10 mol adduct of aliphatic amine of 12-16 are preferred.

  As the nonionic surfactant (B), any of known surfactants used for scouring agents and the like may be used. For example, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyalkylene alkyl ether, polyoxyalkylene alkylaryl ether, polyoxyalkylene aryl ether, polyoxyalkylene alkylamine, polyoxyalkylene glycol and the like can be mentioned. These may be used alone or in combination of two or more.

  In the fiber refining agent composition of the present invention, the anionic surfactant (AA) and/or the anionic surfactant (AN) and the nonionic surfactant (B) relative to the total solid weight of the anionic surfactant ( It is preferable that AA) and/or (AN) is 5 to 60% by weight, nonionic surfactant (B) is 40 to 95% by weight, anionic surfactant is 15 to 60% by weight, and nonionic surfactant is It is preferably 40 to 85% by weight, more preferably 20 to 55% by weight of anionic surfactant and 45 to 80% by weight of nonionic surfactant. As a result, sufficient alkali resistance and scouring can be ensured. Further, the anionic surfactant (AA) and/or (AN) is contained in an amount of 5 to 60% by weight based on the total weight of the non-ionic surfactant (AA) and/or (AN) and the nonionic surfactant (B). It is preferable that the nonionic surfactant (B) is blended at 40 to 95% by weight. Thereby, a solvent, a defoaming agent, an alkaline agent, etc. can be added as the third component.

  In the scouring agent composition of the present invention, if necessary, soda ash, alkali builder such as sodium hydroxide and polyoxyalkylene ether type, silicone oil type, mineral oil type, natural fatty acid salt (coconut oil fatty acid potassium salt, etc.) ) Etc. can be used together.

  The scouring agent of the present invention is used so that the concentration of nonvolatile components in the treatment bath is 0.7 to 20 g/L, preferably 3 to 10 g/L. In this case, it is suitable that the alkali concentration of the treatment liquid, for example, sodium hydroxide concentration is 1 to 100 g/L, and preferably 10 to 80 g/L. Here, the nonvolatile content (also referred to as solid content) means that a certain amount of the sample is spread evenly on an aluminum sheet and dried at 110°C under irradiation of an infrared lamp, and the fluctuation range of the volatile content for 150 seconds becomes 0.15% by weight. It is the residual when the end point of the measurement is when

  The scouring agent of the present invention can be applied to natural fibers such as cotton, hemp, and wool, compound fibers such as polyester, nylon, rayon, triacetate, and mixed spun woven fibers thereof. The refining method may be either a batch method or a continuous method, but the refining agent of the present invention is preferably used in a continuous method in which the alkali concentration is generally high. The refining temperature is about 20 to 140° C., preferably about 50 to 130° C., depending on the type of fiber. Further, it can be used not only in the fiber refining step but also in the bleaching step and the like.

Examples of the present invention will be shown below, but the present invention is not limited to these examples.
Reaction examples of alkylene oxide adducts of secondary and/or branched aliphatic alcohols having 8 to 18 carbon atoms and alkylene oxide adducts of aliphatic amines having 8 to 18 carbon atoms are also shown below.

Example 1
In a 1 liter capacity reaction vessel equipped with a thermometer and a stirrer, 800 g of polyoxyethylene (3 mol) isodecyl ether was placed, and 160 g of phosphoric anhydride was gradually charged in the range of 40 to 60° C. under a nitrogen atmosphere. .. The reaction was carried out at 80° C. for 3 hours to obtain a yellow reaction product (component A1).

Examples 2-5
Reaction products (components A2 to 5) were obtained in the same manner as in Example 1.

Example 6
A reaction vessel having a capacity of 1 liter equipped with a thermometer, a reflux condenser and a stirrer was charged with 500 g of polyoxyethylene (3 mol) isodecyl ether, 155 g of ethyl acrylate and 10 g of sodium methylate (24%). The temperature was raised with stirring, and the reaction was carried out at 60° C. for 2 hours. Then, 40 g of sodium hydroxide and 250 g of soft water were added, and the reaction was further performed at 90° C. for 2 hours. A colorless transparent reaction product (component A5) was obtained by neutralizing with hydrochloric acid and desalting.

Examples 7-18
Reaction products (components A7 to 18) were obtained in the same manner as in Example 6.

Comparative Example 1
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (3) 12 parts of lauryl ether sulfate Na-C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 45 parts coconut oil fatty acid potassium salt 3 parts Water 40 parts

Comparative example 2
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (2) 2-ethylhexyl ether sulfate Na 12 parts C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 45 parts coconut oil fatty acid potassium salt 3 parts Water 40 parts

Comparative Example 3
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· Sec-C ₁₅ 12 parts of an alkyl sulfonic acid Na-C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 45 parts coconut oil fatty acid potassium salt 3 parts Water 40 parts

Comparative Example 4
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (3) tridecanol sulfate Na 12 parts C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 45 parts coconut oil fatty acid potassium salt 3 parts Water 40 parts

Comparative Example 5
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (15) PO (2 ) isotridecanol sulfate Na 12 parts C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 45 parts coconut oil fatty acid potassium salt 3 parts Water 40 parts

Comparative Example 6
The following compounds were blended to obtain a colorless and transparent liquid scouring agent for comparison.
· EO (6) iso 22 parts tridecyl ether carboxylate sodium salt, C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 36 parts coconut oil fatty acid potassium salt 2 parts Water 40 parts

Comparative Example 7
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (2) lauryl 7 parts of ether sodium carboxylate, C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 40 parts coconut oil fatty acid potassium salt 3 parts Water 50 parts

Comparative Example 8
The following compounds were mixed to obtain a pale yellow transparent liquid scouring agent for comparison.
· EO (2) 14 parts of phosphate monoester triethanolamine salt, C ₁₂ ~ ₁₄ secondary alcohol (EO) ₉ 40 parts coconut oil fatty acid potassium salt 3 parts Water 43 parts lauryl ether

The evaluation of each example was performed by the following method.
<Refining method>
Using various refining agents shown in the table, a cotton twill high density machine (warp yarn 30/2 cotton 99 yarns/inch, weft yarn 10 cotton 88 yarns/inch) was scoured under the following conditions.
Treatment: Oxidizing desizing agent Na ₂ S ₂ O ₈ powder 5 g/liter
Caustic soda 48°Be 50g/liter
Scouring agent 2 g/liter Testing machine; Mini color dyeing machine Scouring conditions; 100°C x 20 minutes Bath ratio; 1:15
Rinse with water; 60 seconds Dry; 90°C x 60 minutes

<Permeability>
Dense cotton twill high density fabric (warp 30/2 cotton 99/inch, weft 10 cotton 88/inch) 1.5 cm square is floated on the liquid surface of 30° C. The time from settling to settling was measured for 5 sheets. Under this condition, it is desirable that the permeability is 140 seconds or less.

<Rewettability>
Dye (Sumilight Supra Turquoise Blue G conc.) (5 g/L) liquid was dropped on the scouring cloth, and the appearance was judged based on the judgment criteria that a material with a sufficiently large spread and no unevenness in the weft is good. ..
⊚: good, ○: intermediate, Δ: bad, ×: not wet

<Alkali resistance>
The following samples were allowed to stand at 40° C. for 24 hours, and the appearance was visually evaluated.
Treatment: Oxidizing desizing agent 15g/l
Caustic soda 60g/liter
Scouring agent 5 g/l ⊚: Oil droplets and phase separation do not occur and the appearance remains transparent.
◯: Oil droplets and phase separation do not occur, but the appearance is suspended.
Δ: Redispersion is easy, although a partially non-uniform state is observed.
X: Occurrence of oil droplets or phase separation, and redispersion is difficult or not.

<Refinability>
The scouring cloth was extracted with a Soxhlet extractor using hexane, and the residual fat rate was measured. Under this condition, the residual fat rate is preferably 0.25% or less.

Example 19
Scouring in the same manner as in Example 11 for a plain weave of cotton/polyester blended yarn (55/45% by weight) (warp No. 42 cotton/polyester blended yarn 140 yarns/inch, weft yarn 42 cotton/polyester blended yarn 76 yarns/inch) The sex etc. were evaluated. The results of the evaluation are shown in Table 2.

From Table 2, it can be seen that the scouring agent composition of the present invention exhibits excellent scouring properties, penetrability, rewetting properties and alkali resistance.

Claims (11)

Anionic surfactant (AA-1) obtained by anionizing an alkylene oxide adduct of an aliphatic secondary alcohol having 8 to 18 carbon atoms and/or a branched aliphatic alcohol having 8 to 18 carbon atoms and/or 8 carbon atoms Containing an anionic surfactant (AN-1) obtained by anionizing an alkylene oxide adduct of an aliphatic amine of -18 and a nonionic surfactant (B),
These anionic surfactants (AA-1) and/or (AN-1) and nonionic surfactants (B) are added to the total nonvolatile weight of the anionic surfactants (AA-1) and/or (AN-). A scouring agent composition for fibers, characterized in that the nonvolatile content of 1) is 5 to 60% by weight, and the nonvolatile content of the nonionic surfactant (B) is 40 to 95% by weight. An anionic surfactant containing a (poly)alkylene oxide structural unit having one end blocked with an aliphatic secondary alkoxy group having 8 to 18 carbon atoms and/or a branched aliphatic alkoxy group having 8 to 18 carbon atoms (AA-2 And/or an anionic surfactant containing a (poly)alkylene oxide structural unit having one end blocked with an amino group, and one of the substituents of the amino group is an aliphatic hydrocarbon group having 8 to 18 carbon atoms ( AN-2) and a nonionic activator (B) are contained,
Based on the total nonvolatile weight of these anionic surfactants (AA-2) and/or (AN-2) and nonionic surfactants (B), anionic surfactants (AA-2) and/or (AN- A scouring agent composition for fibers, characterized in that the nonvolatile content weight of 2) is 5 to 60% by weight, and the nonvolatile content weight of the nonionic surfactant (B) is 40 to 95% by weight. The anionic surfactant has the following chemical formula (1)
R ¹ O(AO) _n (CH ₂ ) _p COOM (1)
(In the formula, R ¹ together with an adjacent oxygen atom form an aliphatic secondary alkoxy group having 8 to 18 carbon atoms and/or a branched aliphatic alkoxy group having 8 to 18 carbon atoms, and AO is an ethylene oxide group ( EO) and at least one alkylene oxide group selected from a propylene oxide group (PO), which may constitute a block adduct, an alternating adduct or a random adduct, and M is a hydrogen atom or Alkaline group, n is an integer of 1 to 50, and p is an integer of 1 to 3.)
The composition according to claim 1, which is an anionic surfactant represented by:   The anionic surfactant of the formula (1) is an anionic surfactant obtained by etherifying a nonionic surfactant of an ethylene oxide 3 to 7 mol adduct of a branched aliphatic alcohol having 10 to 12 carbon atoms with ether carboxy (salt). The composition according to claim 3, which is an agent. The anionic surfactant of formula (1) is an anionic surfactant in which R ¹ is a branched aliphatic hydrocarbon having 10 to 12 carbon atoms, AO is an ethylene oxide group, n=3 to 7 and p=2. The composition according to claim 3, which is The anionic surfactant has the following chemical formula (2)
[R ¹ O(AO) _n ] _q PO _4-q M _3-q (2)
(In the formula, R ¹ together with an adjacent oxygen atom form an aliphatic secondary alkoxy group having 8 to 18 carbon atoms and/or a branched aliphatic alkoxy group having 8 to 18 carbon atoms, and AO is an ethylene oxide group ( EO) and at least one alkylene oxide group selected from a propylene oxide group (PO), which may constitute a block adduct, an alternating adduct or a random adduct, and M is a hydrogen atom or Alkaline group, n is an integer of 1 to 50, and q is 1 or 2.)
The composition according to claim 1, which is an anionic surfactant represented by:   The anionic surfactant of the formula (2) is an anionic surfactant obtained by converting a nonionic surfactant of ethylene oxide 3 to 7 mol adduct of a branched aliphatic alcohol having 10 to 12 carbon atoms into a phosphoric acid ester (salt). The scouring agent composition for fibers according to claim 6, which is an agent. The anionic surfactant of formula (2) is an anionic surfactant in which R ¹ is a branched aliphatic hydrocarbon having 10 to 12 carbon atoms, AO is an ethylene oxide group, and n=3 to 7. The composition as described. The anion activator has the following chemical formula (3)
R ² N[(AO) _m (CH ₂ ) _p COOM][(AO) _n X] (3)
(In the formula, R ² represents an aliphatic hydrocarbon group having 8 to 18 carbon atoms, AO represents at least one alkylene oxide group selected from an ethylene oxide group (EO) and a propylene oxide group (PO), May form a block adduct, an alternating adduct or a random adduct, X is a (CH ₂ ) _p COOM group or a hydrogen atom, M is a hydrogen atom or an alkaline group, and m and n are 1 to 50. , And p is an integer of 1 to 3.)
The composition according to claim 1 or 2, which is an anionic surfactant represented by: The anionic surfactant of formula (3) is an anionic surfactant in which R ² is an aliphatic hydrocarbon group having 12 to 16 carbon atoms, AO is an ethylene oxide group, and n=2 to 10. Composition. The anionic surfactant of the formula (3) is an anionic surfactant obtained by etherification (salt) of a nonionic surfactant of an ethylene oxide (2-10 mol) adduct of an aliphatic amine having 12 to 16 carbon atoms. The scouring agent composition for fibers according to item 9.