TW202417709A - Polyester synthetic fiber treatment agent, composition containing polyester synthetic fiber treatment agent, first component of polyester synthetic fiber treatment agent, composition containing first component of polyester synthetic fiber treatment agent, second component of polyester synthetic fiber treatment agent, composition containing second component of polyester synthetic fiber treatment agent, diluted liquid of polyester synthetic fiber treatment agent, method for treating polyester synthetic fiber, and polyester synthetic fiber - Google Patents

Abstract

The subject of the present invention is to provide a polyester-based synthetic fiber treatment agent, etc., which can improve the emulsification stability when the synthetic fiber treatment agent is made into a water dilution, and can also reduce the adhesion of the fiber surface to which the synthetic fiber treatment agent is applied, and inhibit the reduction of fiber strength. The polyester-based synthetic fiber treatment agent of the present invention contains 5% by mass or more of a (poly)oxyalkylene derivative (A), 1% by mass or more of the following organic acid compound (B), and 5% by mass or more of the following organic phosphate compound (C). The pH of a 5% by mass water dilution of the polyester-based synthetic fiber treatment agent (without solvent) at 25°C is 5.5 or more and 8.5 or less. The organic acid compound (B) is at least one selected from an organic acid, an organic acid salt, and an organic acid anhydride. The organic phosphate compound (C) is at least one selected from organic phosphates having a alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof.

Description

Treatment agent for polyester synthetic fibers, composition containing the treatment agent for polyester synthetic fibers, first treatment agent for polyester synthetic fibers, composition containing the first treatment agent for polyester synthetic fibers, second treatment agent for polyester synthetic fibers, composition containing the second treatment agent for polyester synthetic fibers, diluted solution of treatment agent for polyester synthetic fibers, treatment method for polyester synthetic fibers, and polyester synthetic fibers

The present invention relates to a treatment agent for polyester synthetic fibers, a composition containing the treatment agent for polyester synthetic fibers, a first treatment agent for polyester synthetic fibers, a composition containing the first treatment agent for polyester synthetic fibers, a second treatment agent for polyester synthetic fibers, a composition containing the second treatment agent for polyester synthetic fibers, a diluted solution of the treatment agent for polyester synthetic fibers, a method for treating polyester synthetic fibers, and polyester synthetic fibers.

For example, in the spinning and stretching steps and post-production steps of synthetic fibers, a synthetic fiber treatment agent is sometimes applied to the surface of the fiber from the viewpoints of reducing friction, antistatic properties, and bundling properties of the synthetic fiber.

Currently, there are known treatment agents for synthetic fibers disclosed in Patent Documents 1 to 5. Patent Document 1 discloses a treatment agent for polyester-based synthetic fibers, which contains an alkali metal salt of an alkyl phosphate ester having a specific alkyl group, a specific surfactant, and a specific phosphate metal salt in a specific ratio, wherein the acid value of the alkali metal salt of the alkyl phosphate ester is 0.1 to 90 KOHmg/g. Patent Document 2 discloses a treatment agent for polyester-based synthetic fibers, which contains a specific alkyl phosphate ester, a specific surfactant, and a monohydric aliphatic alcohol having a specific alkyl group in a specific ratio. Patent document 3 discloses a fiber treatment agent for textile production, which contains as essential components an A component composed of polyvinyl alcohol or its derivatives and a B component composed of an alkyl phosphate potassium salt or a polyoxyalkylene alkyl phosphate potassium salt having a specific alkyl group, wherein the A component and the B component are mixed in a specific ratio. Patent document 4 discloses a treatment agent for polyolefin-based synthetic fibers, which contains a specific organic acid, two types of alkyl phosphates, and a polyoxyalkylene derivative in a specific ratio, wherein the pH of the aqueous liquid is 3 or more and less than 7. Patent document 5 discloses a treatment agent for polyolefin-based synthetic fibers, which contains fumaric acid, a specific nonionic surfactant, a dialkyl sulfosuccinate having an alkyl group with a carbon number of 8 to 1, and a polyglycerol fatty acid ester in a specific ratio.

Prior art documents Patent documents Patent document 1: Japanese Patent No. 5796922 Patent document 2: Japanese Patent No. 5796923 Patent document 3: Japanese Patent No. 5651033 Patent document 4: Japanese Patent No. 6057489 Patent document 5: Japanese Patent Publication No. 2018-31090

Problems to be solved by the invention However, in conventional synthetic fiber treatment agents, when the synthetic fiber treatment agent is made into a water-diluted solution, the emulsion stability is sometimes reduced, resulting in the generation of precipitates, etc. Also, sometimes the degree of adhesion of the synthetic fiber treatment agent to the fiber surface becomes higher, resulting in spinning defects. Also, sometimes the strength of the synthetic fiber treatment agent to the fiber is reduced, resulting in process failure.

Means for solving the problem The inventors of the present invention conducted research to solve the above-mentioned problem and found that the treatment agent for polyester-based synthetic fibers contains a (poly)oxyalkylene derivative (A), a specific organic acid compound (B), and a specific organic phosphate compound (C), and the pH composition is defined, which has a particularly good effect.

Various forms used to solve the above problems are described.

Form 1 is a treatment agent for polyester-based synthetic fibers, which contains 5 mass% or more of a (poly)oxyalkylene derivative (A), 1 mass% or more of the following organic acid compound (B), and 5 mass% or more of the following organic phosphate compound (C); the key point is that: a 5 mass% aqueous dilution of the above-mentioned treatment agent for polyester-based synthetic fibers (without solvent) has a pH of 5.5 or more and 8.5 or less at 25°C; the organic acid compound (B) is at least one selected from an organic acid, an organic acid salt, and an organic acid anhydride; the organic phosphate compound (C) is at least one selected from an organic phosphate having a alkyl group with 16 or more and 20 or less carbon atoms in the molecule, and a salt thereof.

Form 2 is a polyester-based synthetic fiber treating agent as described in Form 1, wherein the organic acid compound (B) is at least one selected from a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, a salt of a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, and a divalent to pentavalent carboxylic acid anhydride having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group.

Aspect 3 is the treating agent for polyester-based synthetic fibers as described in aspect 1 or 2, wherein the (poly)oxyalkylene derivative (A) comprises at least one selected from the group consisting of polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines.

Aspect 4 is a polyester synthetic fiber treating agent as described in any one of aspects 1 to 3, wherein when the total content of the (poly)oxyalkylene derivative (A), the organic acid compound (B), and the organic phosphate compound (C) is 100 parts by mass, the total of the (poly)oxyalkylene derivative (A) and the organic acid compound (B) is 20 parts by mass to 80 parts by mass, and the organic phosphate compound (C) is 20 parts by mass to 80 parts by mass.

Form 5 is a treatment agent for polyester-based synthetic fibers as described in any one of Forms 1 to 4, wherein the treatment agent comprises in combination: a first treatment agent for polyester-based synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a second treatment agent for polyester-based synthetic fibers containing the above-mentioned organic phosphate compound (C); and either or both of the above-mentioned first treatment agent for polyester-based synthetic fibers and the above-mentioned second treatment agent for polyester-based synthetic fibers contain the above-mentioned organic acid compound (B).

Aspect 6 is the treating agent for polyester synthetic fibers according to any one of aspects 1 to 5, wherein the polyester synthetic fibers are polyester staple fibers.

Aspect 7 is the treating agent for polyester synthetic fibers as described in any one of aspects 1 to 6, wherein the polyester synthetic fibers are for spinning.

Form 8 is a composition containing a polyester synthetic fiber treating agent, the key point of which is that it contains the polyester synthetic fiber treating agent described in any one of Forms 1 to 7 and the following solvent (S); the boiling point of the solvent (S) under atmospheric pressure is below 105°C.

Form 9 is a first treatment agent for polyester-based synthetic fibers, which contains a (poly)oxyalkylene derivative (A) and is used in combination with a second treatment agent for polyester-based synthetic fibers or a composition containing the second treatment agent for polyester-based synthetic fibers; the second treatment agent for polyester-based synthetic fibers contains the following organic phosphate compound (C); the composition containing the second treatment agent for polyester-based synthetic fibers contains the second treatment agent for polyester-based synthetic fibers and the following solvent (S); the key point is that: either or both of the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers contain the following organic acid compound (B); when the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers are mixed, the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers are mixed, the second ... The pH of the product (without solvent) at 25° C. is 5.5 or more and 8.5 or less when it is diluted in water by 5% by mass; the mixture of the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers (without solvent) contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the organic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the organic acid compound (B) is at least one selected from the group consisting of organic acids, organic acid salts, and organic acid anhydrides; the organic phosphate compound (C) is at least one selected from organic phosphates having a alkyl group having 16 or more and 20 carbon atoms in the molecule, and salts thereof; and the boiling point of the solvent (S) under atmospheric pressure is 105° C. or less.

Form 10 is a composition containing a first treatment agent for polyester-based synthetic fibers, the key point of which is that it contains the first treatment agent for polyester-based synthetic fibers described in Form 9 and the following solvent (S); the boiling point of the solvent (S) under atmospheric pressure is below 105°C.

Form 11 is a second treatment agent for polyester-based synthetic fibers, which contains the following organic phosphate compound (C) and is used together with a first treatment agent for polyester-based synthetic fibers or a composition containing the first treatment agent for polyester-based synthetic fibers; the first treatment agent for polyester-based synthetic fibers contains a (poly)oxyalkylene derivative (A); the composition containing the first treatment agent for polyester-based synthetic fibers contains the first treatment agent for polyester-based synthetic fibers and the following solvent (S); the key point is that: either or both of the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers contain the following organic acid compound (B); when the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers are mixed, the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers are mixed. The pH of the mixture (without solvent) at 25° C. is 5.5 or more and 8.5 or less when the mixture is diluted with water at 5% by mass; the mixture of the first treatment agent for polyester-based synthetic fibers and the second treatment agent for polyester-based synthetic fibers (without solvent) contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the organic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the organic acid compound (B) is at least one selected from the group consisting of organic acids, organic acid salts, and organic acid anhydrides; the organic phosphate compound (C) is at least one selected from organic phosphates having a alkyl group having 16 or more and 20 carbon atoms in the molecule, and salts thereof; and the boiling point of the solvent (S) under atmospheric pressure is 105° C. or less.

Form 12 is a composition containing a second treatment agent for polyester-based synthetic fibers, the key point of which is that it contains the second treatment agent for polyester-based synthetic fibers described in Form 11 and the following solvent (S); the solvent (S) has a boiling point of 105° C. or less under atmospheric pressure.

Form 13 is a diluted solution of a polyester synthetic fiber treating agent, the main point of which is that it contains the polyester synthetic fiber treating agent described in any one of Forms 1 to 7, and the concentration of the polyester synthetic fiber treating agent is not less than 0.1 mass % and not more than 10 mass %.

Form 14 is a method for treating polyester synthetic fibers, the main point of which is: providing the polyester synthetic fibers with a diluted solution of a treating agent for polyester synthetic fibers; the diluted solution of the treating agent for polyester synthetic fibers is obtained by adding the treating agent for polyester synthetic fibers described in any one of Forms 1 to 7 to water.

Form 15 is a method for treating polyester synthetic fibers, the main point of which is: providing the polyester synthetic fibers with a diluted solution of a treating agent for polyester synthetic fibers; the diluted solution of the treating agent for polyester synthetic fibers is obtained by adding the composition containing the treating agent for polyester synthetic fibers described in Form 8 to water.

Form 16 is a method for treating polyester synthetic fibers, the main point of which is: giving the polyester synthetic fibers a diluted solution of a treatment agent for polyester synthetic fibers; the diluted solution of the treatment agent for polyester synthetic fibers is obtained by adding the first treatment agent for polyester synthetic fibers described in Form 9 or the composition containing the first treatment agent for polyester synthetic fibers described in Form 10, the second treatment agent for polyester synthetic fibers described in Form 11 or the composition containing the second treatment agent for polyester synthetic fibers described in Form 12 to water.

Aspect 17 is a polyester synthetic fiber, wherein the polyester synthetic fiber treating agent described in any one of aspects 1 to 7 is attached thereto.

Effect of the invention According to the present invention, the emulsification stability of the synthetic fiber treatment agent when it is made into a water-diluted liquid can be improved. In addition, the adhesion of the fiber surface to which the synthetic fiber treatment agent is applied can be reduced, and the reduction of the fiber strength can be suppressed.

<First embodiment> The first embodiment of the present invention, i.e., a treatment agent for polyester-based synthetic fibers (hereinafter referred to as the treatment agent), is described below. The treatment agent of this embodiment contains a (poly)oxyalkylene derivative (A), the following organic acid compound (B), and the following organic phosphate compound (C), wherein a 5 mass% aqueous dilution of the treatment agent has a pH of 5.5 to 8.5 at 25°C.

((Poly)oxyalkylene derivative (A)) The (poly)oxyalkylene derivative (A) used in the treatment agent of this embodiment acts as a surfactant to improve the stability of the treatment agent, thereby improving the various functions of the treatment agent.

Examples of the (poly)oxyalkylene derivatives (A) include those having a (poly)oxyalkylene structure obtained by adding alkylene oxide to alcohols or carboxylic acids, ether/ester compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to ester compounds formed by carboxylic acids and polyols, those having a (poly)oxyalkylene structure obtained by adding alkylene oxide to aliphatic amines as amine compounds, those having a (poly)oxyalkylene structure obtained by adding alkylene oxide to fatty acid amides, and block copolymers having polyoxyethylene chains and polyoxypropylene chains.

Among them, polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene alkenyl esters, polyoxyalkylene alkylphenyl ethers, polyoxyalkylene polyol fatty acid esters, polyoxyalkylene alkylamines, and polyoxyalkylene alkenylamines are preferred. In addition, polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines are more preferred from the viewpoint of being able to further improve the emulsification stability when the treating agent is made into a water-diluted solution.

Specific examples of alcohols used as the raw material of the (poly)oxyalkylene derivative (A) include (1) straight-chain alkanols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol and triacontanol; (2) isopropyl alcohol, isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, etc. (i) branched-chain alkanols such as isodecyl alcohol, isopentadecyl alcohol, isohexadecanol, isohexadecanol, isoheptadecanol, isooctadecanol, isononadecanol, isoeicosanol, isohexadecanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexadecanol, isohexadecanol, isohexadecanol, isooctacosanol, isononadecanol and isotriacontanol; (2) straight-chain alkanols such as tetradecanol, hexadecanol, heptadecanol, octadecanol and nonadecanol; (3) branched-chain alkanols such as isohexadecanol and isohexadecanol; (4) branched-chain alkanols such as isohexadecanol and isooctadecanol; (5) cycloalkanols such as cyclopentanol and cyclohexanol; (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol and tristyrenated phenol.

Specific examples of carboxylic acids used as the raw material of the (poly)oxyalkylene derivative (A) include (1) linear alkyl carboxylic acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, and docosanoic acid; (2) 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isodecanoic acid, (1) branched-chain alkyl carboxylic acids such as hexadecanoic acid and isooctadecanoic acid; (2) straight-chain olefin carboxylic acids such as octadecenoic acid, octadecadienoic acid and octadecatrienoic acid; (3) aromatic carboxylic acids such as octadecenoic acid; (4) aromatic carboxylic acids such as benzoic acid; (5) hydroxy carboxylic acids such as ricinoleic acid; (6) naturally derived fatty acids such as castor oil fatty acid, sesame oil fatty acid, rosin oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, palm oil fatty acid, palm kernel fatty acid and coconut oil fatty acid.

The alkylene oxide used as the raw material for forming the (poly)alkylene oxide structure in the (poly)alkylene oxide derivative (A) is preferably an alkylene oxide having a carbon number of 2 or more and 4 or less. Specific examples of alkylene oxides include ethylene oxide, propylene oxide, butylene oxide, etc. The added molar number of alkylene oxide can be appropriately set, preferably 0.1 mole or more and 250 moles or less, more preferably 1 mole or more and 200 moles or less, and most preferably 2 moles or more and 150 moles or less. It can also be a range of any combination of the above upper and lower limits. Among them, the added molar number of alkylene oxide represents the molar number of alkylene oxide relative to 1 mole of the addition target compound in the loading raw material. The alkylene oxide can be used alone, or two or more alkylene oxides can be used in appropriate combination. When two or more types of alkylene oxides are used, the addition form may be any of block addition, random addition, and a combination of block addition and random addition, without particular limitation.

Specific examples of the polyol used as the raw material of the (poly)oxyalkylene derivative (A) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerol, 2-methyl-2-hydroxymethyl-1,3-propanediol, trihydroxymethylpropane, sorbitan, pentaerythritol, sorbitol, and the like.

Specific examples of the aliphatic amine used as the raw material of the (poly)oxyalkylene derivative (A) include methylamine, ethylamine, butylamine, octylamine, decylamine, laurylamine, octadecylamine, octadecylamine, coconut amine and the like.

Specific examples of the fatty acid amide used as the raw material of the (poly)oxyalkylene derivative (A) include caprylic acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, linalool amide, and the like.

The block copolymer having a polyoxyethylene chain and a polyoxypropylene chain is not particularly limited as long as it has a polyoxypropylene chain with low hydrophilicity and a polyoxyethylene chain with high hydrophilicity and has an interfacial activity. The number of polyoxyethylene chains and polyoxypropylene chains in the molecule is not particularly limited, for example, it can be a block copolymer composed of one polyoxypropylene chain and one polyoxyethylene chain, or it can be a poloxamer-based surfactant composed of a polyoxypropylene chain and two polyoxyethylene chains sandwiching it. In addition, it can also be an ether compound formed by adding a polyoxyethylene chain and a polyoxypropylene chain to a polyol. The addition molar number of ethylene oxide forming the polyoxyethylene chain is not particularly limited, for example, it can be more than 5 moles and less than 200 moles. The number of moles of propylene oxide added to form the polyoxypropylene chain is not particularly limited, and may be, for example, 5 mol to 100 mol.

Specific examples of the (poly)oxyalkylene derivatives (A) include polyoxyethylene decylamine, polyoxyethylene dodecylamine, (polyoxyethylene) (polyoxypropylene) dodecylamine, polyoxyethylene octadecylamine, (polyoxyethylene) (polyoxypropylene) octadecylamine, polyoxyethylene decyl ether, (polyoxyethylene) (polyoxypropylene) decyl ether, polyoxyethylene dodecyl ether, (polyoxyethylene) (polyoxypropylene) C9-C11 alkyl ether, polyoxyethylene C12-C13 alkyl ether, (polyoxyethylene) (polyoxypropylene) C12-C13 alkyl ether, polyoxyethylene C12-C14 alkyl ether, (polyoxyethylene) (ethylene oxide) (polyoxypropylene) tridecyl ether, polyoxyethylene tridecyl ether, (polyoxyethylene) (polyoxypropylene) C11-C14 alkyl ether, polyoxyethylene C11-C14 alkyl ether, polyoxyethylene octadecyl ether, polyoxyethylene oleyl ether, polyoxyethylene lignoceryl ether, polyoxyethylene octadecyl ether, (polyoxyethylene) (polyoxypropylene) hardened castor oil, (polyoxyethylene) (polyoxypropylene) propylene glycol, (polyoxyethylene) (polyoxypropylene) butyl ether, polyoxyethylene lauryl ester, coconut fatty acid-polyoxyethylene, polyoxypropylene oleyl ester, polyoxyethylene nonylphenyl ether, etc.

The (poly)oxyalkylene derivatives (A) may be used alone or in combination of two or more.

In the treatment agent, the lower limit of the content of the (poly)oxyalkylene derivative (A) is preferably 5% by mass or more, and more preferably 10% by mass or more. When the content of the (poly)oxyalkylene derivative (A) is 5% by mass or more, the emulsification stability of the treatment agent when it is diluted in water can be improved. In addition, the upper limit of the content of the (poly)oxyalkylene derivative (A) is preferably 90% by mass or less, and more preferably 85% by mass or less. When the content of the (poly)oxyalkylene derivative (A) is 90% by mass or less, the adhesion of the treatment agent to the fiber surface can be reduced. The range may also be any combination of the above upper and lower limits.

(Organic acid compound (B)) The organic acid compound (B) used in the treatment agent of this embodiment can be exemplified by organic acids, organic acid salts, and organic acid anhydrides. The organic acid compound (B) can particularly suppress the reduction in fiber strength imparted by the treatment agent.

Examples of the organic acid include compounds having a carboxyl group, and alkylphosphoric acids, alkylsulfonic acids, and alkylsulfuric acids other than the component (C) described below.

The compound having a carboxyl group may be a monobasic acid or a polybasic carboxylic acid. In addition, the number of carbon atoms excluding the carbon atoms derived from the carboxyl group is not particularly limited. Examples of the compound having a carboxyl group include monovalent fatty acids, hydroxy fatty acids, polybasic acids, amino acids, aminocarboxylic acids, and the like.

Fatty acids may be appropriately known and may be saturated fatty acids or unsaturated fatty acids. In addition, they may be linear or branched.

Specific examples of saturated fatty acids include caproic acid, acetic acid, propionic acid, butyric acid, oleic acid, caproic acid (caprylic acid), caprylic acid (2-ethylhexanoic acid), caprylic acid (caprylic acid), nonanoic acid, capric acid (capric acid), dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), tetracosanoic acid, etc.

Specific examples of unsaturated fatty acids include crotonic acid, myristic acid, palmitic acid, oleic acid, tallow acid, eicosenoic acid, linoleic acid, α-linoleic acid, γ-linoleic acid, arachidic acid, and the like.

Specific examples of polycarboxylic acids include (1) dibasic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, fumaric acid, cis-butenedioic acid, adipic acid, and sebacic acid; (2) tribasic acids such as aconitic acid; (3) aromatic dicarboxylic acids such as benzoic acid, terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid; (4) aromatic tricarboxylic acids such as benzene trimecartonic acid; and (5) aromatic tetracarboxylic acids such as pyromellitic acid.

Specific examples of hydroxy fatty acids include citric acid, lactic acid, malic acid, tartaric acid, gluconic acid, glycolic acid, ricinoleic acid, and the like.

Specific examples of amino acids include alanine, valine, leucine, isoleucine, methionine, phenylalanine, tryptophan, proline, glycine, serine, threonine, cysteine, tyrosine, asparagine, glutamine, lysine, arginine, histidine, aspartic acid, and the like.

Specific examples of aminocarboxylic acids include ethylenediaminetetraacetic acid (edetic acid), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraaminehexaacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, L-aspartic acid-N,N-diacetic acid, ethylenediaminedisuccinic acid, and the like.

Specific examples of the alkyl sulfonic acid include lauryl sulfonic acid (dodecyl sulfonic acid), myristyl sulfonic acid, cetyl sulfonic acid, oleyl sulfonic acid, stearyl sulfonic acid, tetradecyl sulfonic acid, dodecylbenzene sulfonic acid, dialkyl sulfonic acid (C13-15), and the like.

Specific examples of the alkyl sulfate include lauryl sulfate, oleyl sulfate, stearyl sulfate, and the like.

Specific examples of the alkyl phosphoric acid include lauryl phosphate, octyl phosphate, and the like.

When a salt of an organic acid is used, the salt may be in the form of, for example, an amine salt, a metal salt, or the like.

Examples of the metal salt include alkaline metal salts and alkaline earth metal salts. Specific examples of alkaline metals constituting the alkaline metal salts include sodium, potassium, lithium, etc. Alkaline earth metals constituting the alkaline earth metal salts include metals of Group 2 elements, such as calcium, magnesium, curium, strontium, barium, etc.

The amine constituting the amine salt may be any of a primary amine, a secondary amine, and a tertiary amine. Specific examples of amines constituting amine salts include (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, N-N-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, dimethyllaurylamine, etc.; (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and derivatives thereof; (3) alkanolamines such as monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyldiethanolamine, octyldiethanolamine, lauryldiethanolamine, etc.; (4) arylamines such as N-methylbenzylamine, etc.; (5) polyoxyalkylene alkylamine ethers such as polyoxyethylene laurylamine ether and polyoxyethylene stearylamine ether; (6) ammonia, etc.

Specific examples of the organic acid anhydride include fumaric anhydride, maleic anhydride, acetic anhydride, propionic anhydride, succinic anhydride, phthalic anhydride, oxalic anhydride, benzoic anhydride and the like.

The organic acid compounds (B) may be used alone or in combination of two or more.

Among them, from the viewpoint of improving the emulsion stability when the treating agent is made into a water-diluted solution, preferred are one to five carboxylic acids having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, salts of one to five carboxylic acids having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, and di- to pentacarboxylic acid anhydrides having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group.

In the treatment agent, the lower limit of the content of the organic acid compound (B) is preferably 1% by mass or more, and more preferably 3% by mass or more. When the content of the organic acid compound (B) is 1% by mass or more, the pH of the treatment agent can be adjusted to an appropriate range, and the reduction in fiber strength imparted by the treatment agent can be suppressed. In addition, the upper limit of the content of the organic acid compound (B) is preferably 25% by mass or less, and more preferably 20% by mass or less. When the content of the organic acid compound (B) is 25% by mass or less, the pH of the treatment agent can be adjusted to an appropriate range, and the emulsification stability of the treatment agent when it is made into a water dilution can be improved. Among them, it can also be a range of any combination of the above upper and lower limits.

(Organic phosphate compound (C)) The organic phosphate compound (C) used in the treatment agent of this embodiment includes organic phosphates having a alkyl group with 16 to 20 carbon atoms in the molecule and salts thereof. The organic phosphate compound (C) can reduce the adhesion of the fiber surface to which the treatment agent is applied.

The alkyl group may be a saturated alkyl group or an unsaturated alkyl group. In addition, the alkyl group may be a straight chain alkyl group or a branched chain alkyl group. The unsaturated alkyl group may be an alkenyl group having one unsaturated carbon bond and a double bond, or may be a alkyldienyl group or an alkyltrienyl group having two or more double bonds. In addition, the alkyl group may be an alkynyl group having one unsaturated carbon bond and a triple bond, or may be a alkyldiynyl group having two or more triple bonds.

Specific examples of the saturated alkyl group include hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, isohexadecyl, isoheptadecyl, isooctadecyl, isonadecyl, isoeicosyl and the like.

Specific examples of the unsaturated alkyl group having one double bond in the alkyl group include hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, isohexadecenyl, isohexadecenyl, isooctadecenyl, isononadecenyl, isoeicosenyl and the like.

The phosphoric acid constituting the organic phosphate compound is not particularly limited, and may be orthophosphoric acid or polyphosphoric acid such as diphosphoric acid. When a salt of an organic phosphate is used, the salt may be, for example, phosphate amine salts, phosphate metal salts, etc. Specific examples of the salt may be those exemplified in the description of the organic acid compound (B).

Specific examples of the organic phosphate compound (C) include cetyl phosphate, cetyl phosphate salts, stearyl phosphate, stearyl phosphate salts, arachidyl phosphate, arachidyl phosphate salts, and the like.

The acid value of the organic phosphate compound (C) is not particularly limited.

The organic phosphate compounds (C) may be used alone or in combination of two or more.

In the treatment agent, the lower limit of the content of the organic phosphate compound (C) is preferably 5% by mass or more, more preferably 10% by mass or more, and optimally 20% by mass. When the content of the organic phosphate compound (C) is 5% by mass or more, the adhesion of the treatment agent to the fiber surface can be reduced. In addition, the upper limit of the content of the organic phosphate compound (C) is preferably 90% by mass or less, more preferably 85% by mass or less, and optimally 80% by mass or less. When the content of the organic phosphate compound (C) is 90% by mass or less, the emulsification stability of the treatment agent when it is made into a water dilution can be improved. Among them, it can also be a range of any combination of the above upper and lower limits.

In the treatment agent, when the total content of the (poly)oxyalkylene derivative (A), the organic acid compound (B), and the organic phosphate compound (C) is set to 100 parts by mass, it is preferably contained in the following ratio: the total content of the (poly)oxyalkylene derivative (A) and the organic acid compound (B) is 20 parts by mass or more and 80 parts by mass or less, and the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less. By defining it within this range, the effect of the present invention can be further improved. Among them, it can also be a range of any combination of the above upper and lower limits.

(pH of treatment agent) The lower limit of the pH of a 5 mass% aqueous dilution of the treatment agent at 25°C is 5.5 or more. When the pH is 5.5 or more, the emulsification stability of the treatment agent when it is made into an aqueous dilution can be improved. The upper limit of the pH of a 5 mass% aqueous dilution of the treatment agent at 25°C is 8.5 or less. When the pH is 8.5 or less, the decrease in fiber strength given by the treatment agent can be suppressed. The range may also be any combination of the above upper and lower limits.

(Storage form) The treatment agent may be a single-dose form containing the above-mentioned components (A) to (C), or may be a two-dose form as shown below from the viewpoint of improving the stability of the preparation.

The two-agent type treating agent is composed of a first treating agent for polyester-based synthetic fibers containing a (poly)oxyalkylene derivative (A) (hereinafter referred to as the "first treating agent") and a second treating agent for polyester-based synthetic fibers containing an organic phosphate compound (C) (hereinafter referred to as the "second treating agent"). Either or both of the first treating agent and the second treating agent contain an organic acid compound (B).

The two-dose treatment agent is prepared by mixing the first treatment agent and the second treatment agent in separate doses before use, for example, during storage or distribution. When the two-dose treatment agent is used, the first treatment agent and the second treatment agent are mixed to prepare a mixture.

(Solvent) The treatment agent of this embodiment may be mixed with a solvent as appropriate to prepare a composition containing a treatment agent for polyester-based synthetic fibers (hereinafter referred to as a "composition containing a treatment agent"), and the composition may be stored or circulated in the form of a composition containing a treatment agent.

The boiling point of the solvent under atmospheric pressure is below 105°C. The atmospheric pressure in this specification refers to the standard atmospheric pressure (101325Pa=1atm). Examples of the solvent include water and organic solvents. Specific examples of organic solvents include lower alcohols such as ethanol and propanol, or low polarity solvents such as hexane. These solvents may be used alone or in combination of two or more. Among these, polar solvents such as water and lower alcohols are preferred from the perspective of excellent dispersibility or solubility of each component, and water is more preferred from the perspective of excellent operability.

In the composition containing the treatment agent, when the total content ratio of the treatment agent and the solvent is set to 100 parts by mass, it is preferred that the treatment agent be contained in an amount of 10 parts by mass or more.

The effect of the treatment agent of the first embodiment is described.

(1-1) The treatment agent of the first embodiment contains the (poly)oxyalkylene derivative (A), the organic acid compound (B), and the organic phosphate compound (C), and the pH of a 5 mass% aqueous dilution of the treatment agent at 25°C is adjusted to be 5.5 or more and 8.5 or less.

Therefore, the emulsion stability when the treatment agent is made into a water-diluted liquid can be improved. This can reduce the generation of precipitates and/or sediments from the emulsion, and reduce the uneven quality of the fiber caused by uneven adhesion of the treatment agent. In addition, the adhesion of the treatment agent to the fiber surface can be reduced, and the reduction in fiber strength can be suppressed. This can reduce the uneven quality of processed products caused by process failures.

(1-2) The treatment agent of the first embodiment may also be composed of a first treatment agent containing a (poly)oxyalkylene derivative (A) and a second treatment agent containing an organic phosphate compound (C). Either or both of the first treatment agent and the second treatment agent contain an organic acid compound (B). According to this configuration, the formulation stability, especially the storage stability, of the treatment agent can be improved.

<Second embodiment> Next, the second embodiment of the present invention, namely the first treatment agent, will be described, focusing on the differences from the above-mentioned embodiments.

The first treatment agent of the present embodiment contains a (poly)oxyalkylene derivative (A). The first treatment agent is used together with a second treatment agent or a composition containing a second treatment agent for polyester-based synthetic fibers (hereinafter referred to as a "composition containing a second treatment agent"), wherein the second treatment agent contains an organic phosphate compound (C), and the composition containing the second treatment agent contains the second treatment agent and a solvent (S). Either or both of the first treatment agent and the second treatment agent contain an organic acid compound (B). In addition, when the mixture of the first treatment agent and the second treatment agent is a 5 mass% aqueous dilution of the treatment agent, the pH at 25°C is in the range of 5.5 to 8.5.

When the mixture of the first treatment agent and the second treatment agent is a composition containing the second treatment agent (wherein the solvent (S) is water), the pH is measured by the following method.

When the mixture of the first treatment agent and the second treatment agent is a water dilution of 5 mass % or more of the treatment agent, the mixture is first diluted to a 5 mass % water dilution of the treatment agent, and then the pH at 25°C is measured.

When the mixture of the first treatment agent and the second treatment agent is a water dilution of less than 5 mass % of the treatment agent, the mixture is first dried or concentrated to a 5 mass % water dilution of the treatment agent, and then the pH at 25°C is measured.

When the mixture of the first treatment agent and the second treatment agent is a composition containing the second treatment agent (wherein the solvent (S) includes a solvent other than water), the pH is measured by the following method.

The solvent is removed from the mixture of the first treatment agent and the second treatment agent, and the mixture is diluted with 5 mass % of the treatment agent in water, and the pH is measured at 25° C. The solvent can be removed from the mixture by heat treating the mixture at 105° C. for 2 hours.

The (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and the solvent (S) are the same as those described in the first embodiment.

(Solvent) The first treatment agent of this embodiment may be mixed with a solvent as appropriate to prepare a composition containing the first treatment agent for polyester-based synthetic fibers (hereinafter referred to as "the composition containing the first treatment agent"), and the composition may be stored or circulated in the form of the composition containing the first treatment agent.

The solvent may be any of those exemplified in the first embodiment. In the composition containing the first treatment agent, when the total content of the first treatment agent and the solvent is 100 parts by mass, the first treatment agent is preferably contained in an amount of 10 parts by mass or more.

The effect of the first treatment agent of the second embodiment is described. The second embodiment has the following effects in addition to the effects of the above-mentioned embodiments.

(2-1) The first treatment agent of the second embodiment contains a (poly)oxyalkylene derivative (A) and is used together with a second treatment agent containing an organic phosphate compound (C). Therefore, the formulation stability of the first treatment agent, especially the storage stability, can be improved. In addition, by adjusting the mixing ratio with the second treatment agent, the components of the obtained treatment agent can be adjusted. In addition, the first treatment agent and the second treatment agent can be circulated separately.

<Third embodiment> Next, the third embodiment of the present invention, i.e., the second treatment agent, will be described, focusing on the differences from the above-mentioned embodiments.

The second treatment agent of this embodiment contains an organic phosphate compound (C). The second treatment agent is used together with the first treatment agent or a composition containing the first treatment agent, wherein the first treatment agent contains a (poly)oxyalkylene derivative (A), and the composition containing the first treatment agent contains the first treatment agent and a solvent (S). Either or both of the first treatment agent and the second treatment agent contain an organic acid compound (B). In addition, when the mixture of the first treatment agent and the second treatment agent is set as a 5 mass% aqueous dilution of the treatment agent, the pH at 25°C is in the range of 5.5 to 8.5. When the mixture of the first treatment agent and the second treatment agent is a composition containing the first treatment agent (using a solvent (S)), the pH is measured by the same method as described in the second embodiment.

The (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and the solvent (S) are the same as those described in the first embodiment.

(Solvent) The second treatment agent of this embodiment may be mixed with a solvent to prepare a composition containing the second treatment agent as appropriate, and the composition may be stored or circulated in the form of the composition containing the second treatment agent.

The solvent may be any of those exemplified in the first embodiment. In the composition containing the second treatment agent, when the total content of the second treatment agent and the solvent is 100 parts by mass, the second treatment agent is preferably contained in an amount of 10 parts by mass or more.

The effect of the second treatment agent of the third embodiment is described. The third embodiment has the following effects in addition to the effects of the above-mentioned embodiments.

(3-1) The second treatment agent of the third embodiment contains an organic phosphate compound (C) and is used together with a first treatment agent containing a (poly)oxyalkylene derivative (A). Therefore, the formulation stability, especially the storage stability, of the second treatment agent can be improved. In addition, by adjusting the mixing ratio with the first treatment agent, the composition of the obtained treatment agent can be adjusted. In addition, the second treatment agent can be circulated separately from the first treatment agent.

<Fourth embodiment> Next, the fourth embodiment of the present invention, i.e., a method for treating polyester synthetic fibers (hereinafter referred to as "fiber treating method"), will be described.

When the treatment agent is a single-dose type, the fiber treatment method of this embodiment is characterized in that a dilute solution containing a solvent and the treatment agent of the first embodiment is applied to the polyester-based synthetic fiber. The preparation method of the dilute solution may include, for example, a method of adding the treatment agent of the first embodiment or a composition containing the treatment agent to a solvent. The dilute solution is preferably prepared by adding the treatment agent of the first embodiment or a composition containing the treatment agent to water.

When the treatment agent is a two-dose type, the fiber treatment method of this embodiment is characterized in that a dilute solution of the treatment agent comprising a solvent, the first treatment agent of the second embodiment, and the second treatment agent of the third embodiment is applied to the polyester synthetic fiber. The preparation method of the dilute solution may include, for example, a method of adding the first treatment agent or a composition containing the first treatment agent, and the second treatment agent or a composition containing the second treatment agent to the solvent. The dilute solution is preferably prepared by adding the first treatment agent or a composition containing the first treatment agent, and the second treatment agent or a composition containing the second treatment agent to water. The ratio of the content of the first treatment agent to the second treatment agent is preferably such that the mass ratio of the non-volatile component is 95/5 to 5/95. By limiting the content to this range, the operability can be improved. In this specification, the non-volatile component refers to the residue after the volatile substances are fully removed by heat treatment of the object at 105°C for 2 hours, that is, the absolutely dry matter.

The solvent used to prepare the dilute solution may be the solvent exemplified in the first embodiment. From the viewpoint of operability, the concentration of the treatment agent in the dilute solution is preferably 0.1 mass % or more and 10 mass % or less.

In the form of using the first treatment agent and the second treatment agent together, the mixing ratio of each agent can be changed arbitrarily. Therefore, even under different manufacturing conditions such as different manufacturing facilities or different climates such as temperature and humidity, it is easy to prepare a treatment agent or dilution liquid that has the best fiber properties or fiber manufacturing properties at any time by finely adjusting the mixing ratio.

In order to emulsify the treatment agent, each treatment agent or a composition containing the treatment agent may be mixed with a solvent and stirred using a known agitator such as a homogenizer, a homogenizer, a rubber mill, a wire mixer, or the like.

The fiber treatment method is a method in which the dilute solution obtained in the above manner is applied to the fiber in at least one of the spinning step, the stretching step, and the post-processing step of the polyester synthetic fiber.

The fiber to which the diluent is applied may be polyester-based synthetic fibers. Specific examples of polyester-based synthetic fibers include polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester-based resins.

The use of the fiber is not particularly limited, and examples thereof include spinning, yarn manufacturing, short fibers, long fibers, nonwoven fabrics, and filling cotton. Short fibers generally refer to those called "staples" and do not include long fibers called "filaments." In addition, the length of the short fibers is not particularly limited as long as it meets the definition of short fibers in the technical field, for example, it is less than 100 mm. Among them, the diluent of the present invention is preferably applicable to polyester short fibers and polyester synthetic fibers for spinning manufacturing.

There is no particular restriction on the ratio of the diluent to the fiber. It is preferred that the diluent is attached to the fiber so that the final solid content is 0.01 mass % to 10 mass %, and more preferably 0.1 mass % to 3 mass %. According to this structure, the performance of each component can be effectively exerted. In addition, there is no particular restriction on the method of attaching the diluent. According to the type, shape, and purpose of the fiber, a known method such as a drum oiling method, a guided oiling method using a metering pump, an immersion oiling method, a spray oiling method, etc. can be adopted. When the immersion oiling method is used, the immersion time is preferably 1 minute to 5 minutes.

The fiber to which the dilute solution is applied may be dried or heated by a known method. The solvent such as water is evaporated by drying or heating, thereby obtaining fibers to which the treatment agent or the first treatment agent and the components contained in the second treatment agent are attached.

The effects of the fiber processing method of the fourth embodiment are described. The fourth embodiment has the following effects in addition to the effects of the above-mentioned embodiments.

(4-1) The fiber processing method of the fourth embodiment is a method of applying a diluent to the fiber, for example, in a spinning step, a stretching step, or a post-processing step. In particular, by adding the processing agent of the first embodiment or a composition containing the processing agent to water for preparation, a diluent having excellent emulsification stability can be obtained. Alternatively, by adding the first processing agent or a composition containing the first processing agent and the second processing agent or a composition containing the second processing agent to water for preparation, a diluent having excellent emulsification stability can be obtained. Therefore, it can effectively exert the performance of each component for spinning, spinning manufacturing, short fiber, long fiber, non-woven fabrics, filling cotton, etc.

The above-mentioned embodiments can also be implemented in the following modified forms. The above-mentioned embodiments and the following modified examples can be implemented in combination with each other within the scope of technical non-contradiction.

・The method for preparing the diluted solution of the treatment agent of the above-mentioned embodiment is not particularly limited, and a method other than the preparation method described in the fourth embodiment may be adopted.

・Within the scope of not impairing the effect of the present invention, each treatment agent, each composition, or diluent of the above-mentioned embodiment may be further compounded with other components for maintaining the quality of each treatment agent, each composition, or diluent, such as other solvents, stabilizers, antistatic agents, adhesives, antioxidants, ultraviolet absorbers, organic acids, surfactants other than the above-mentioned components that are usually used in treatment agents, etc. Among them, from the perspective of effectively exerting the effect of the present invention, other components other than solvents that are usually used in treatment agents are preferably 10% by mass or less in each treatment agent. In addition, other components and each of the above-mentioned treatment agents may also be stored in a different agent.

Embodiment

In order to more specifically illustrate the structure and effect of the present invention, examples are given below, but the present invention is not limited to these examples. In the following examples and comparative examples, if not specifically limited, parts represent parts by mass, and % represents mass %.

Test category 1 (preparation of 1-dose treatment agent)

(Example 1-1) As shown in Table 1, the treatment agent of Example 1-1 was prepared, which contained 25 parts (%) of polyoxyethylene (10 (indicates the addition molar number of ethylene oxide. The same applies hereinafter)) decylamine (A-1) shown in Table 2 of the (poly)oxyalkylene derivative (A), 10 parts (%) of polyoxyethylene (5) decyl ether (A-10), (polyoxyethylene) (polyoxypropylene) (r+s=10, r is the addition molar number of ethylene oxide, s is the addition molar number of propylene oxide) Molar number (the same below)) tridecyl ether (A-21) 7 parts (%), organic acid compound (B) oxalic acid/potassium oxalate = 50/50 (mass ratio) (B-1) 8 parts (%), organic phosphate compound (C) cetyl phosphate and its potassium salt (C-3) 50 parts (%), other component (D) polydimethylsiloxane (D-1) 3 parts (relative to the total of components (A) to (C) 100 parts).

(Example 1-2 to Example 1-28, Comparative Example 1-1 to Comparative Example 1-10) The treatment agents of Example 1-2 to Example 1-28 and Comparative Example 1-1 to Comparative Example 1-10 were prepared in the same manner as the treatment agent of Example 1-1, and contained a (poly)oxyalkylene derivative (A), an organic acid compound (B), an organic phosphate compound (C), and other components (D) in the proportions shown in Table 1.

The type and content of the (poly)oxyalkylene derivative (A), the type and content of the organic acid compound (B), the type and content of the organic phosphate compound (C), and the type and content of the other component (D) are shown in the "(poly)oxyalkylene derivative (A)" column, the "organic acid compound (B)" column, the "organic phosphate compound (C)" column, and the "other component (D)" column of Table 1, respectively. The content of the other component (D) indicates the blending amount (parts) when the total content of the (poly)oxyalkylene derivative (A), the organic acid compound (B), and the organic phosphate compound (C) in the treatment agent is 100 parts.

(pH of treatment agent) Dilute the treatment agent of each example with warm water at about 70°C to prepare a 5% water dilution of the treatment agent. Measure the pH of the prepared 5% water dilution at 25°C. The measured values are shown in the "pH of 5% water dilution" column of Table 1.

Table 1 1. Type of treatment agent (Poly)oxyalkylene derivatives (A) Organic acid compounds (B) Organic phosphate compounds (C) Other ingredients (D) pH of 5% water dilution Emulsion stability Adhesion Fiber strength Type share Type share Type share Type share Type share Type share Type share Type For (A) to (C) total 100 copies Type For (A) to (C) total 100 copies Embodiment 1-1 A-1 25 A-10 10 A-21 7 B-1 8 - - C-3 50 - - D-1 3 - 8.2 ◎ ◎ ◎ Embodiment 1-2 A-1 25 A-10 10 A-21 7 B-1 8 - - C-3 50 - - - - - - 8.2 ◎ ◎ ◎ Embodiment 1-3 A-2 10 A-11 1.5 A-38 0.5 B-2 8 - - C-6 80 - - D-1 5 - - 8.5 ◎ ◎ ◎ Embodiment 1-4 A-2 20 A-12 4.5 A-24 0.5 B-3 5 - - C-5 70 - - D-2 3 - - 8.1 ◎ ◎ ◎ Embodiment 1-5 A-3 35 A-13 10 A-27 8 B-4 7 - - C-6 40 - - D-2 4 - - 7.8 ◎ ◎ ◎ Embodiment 1-6 A-3 35 A-14 20 A-26 15 B-5 10 - - C-1 20 - - - - - - 5.7 ◎ ◎ ◎ Embodiment 1-7 A-4 40 A-15 7 A-35 20 B-6 3 - - C-12 30 - - - - - - 6.9 ◎ ◎ ◎ Embodiment 1-8 A-4 18 A-16 2 - - B-7 10 - - C-5 65 C-7 5 D-1 3 - - 6.1 ◎ ◎ ◎ Embodiment 1-9 A-5 30 A-17 2.5 A-23 2.5 B-8 5.5 - - C-14 60 - - D-1 3 D-2 2 8.3 ◎ ◎ ◎ Embodiment 1-10 A-6 36 A-18 15 A-30 5 B-9 4 - - C-2 40 - - D-1 1 D-2 1 7.5 ◎ ◎ ◎ Embodiment 1-11 A-7 15 A-19 15 - - B-10 20 - - C-7 50 - - - - - - 5.5 ◎ ◎ ◎ Embodiment 1-12 A-8 37 A-20 20 A-32 20 B-11 3 - - C-2 20 - - - - - - 7.3 ◎ ◎ ◎ Embodiment 1-13 A-9 35 A-10 20 A-33 10 B-12 1 B-3 4 C-8 30 - - - - - - 7.4 ◎ ◎ ◎ Embodiment 1-14 A-2 20 A-39 35 - - B-12 2 B-18 3 C-5 40 - - - - - - 8.1 ◎ ◎ ◎ Embodiment 1-15 A-2 30 A-35 5 A-35 10 B-12 0.5 B-8 4.5 C-5 50 - - - - - - 7.6 ◎ ◎ ◎ Embodiment 1-16 A-2 40 A-28 10 A-21 10 B-12 10 - - C-11 30 - - D-2 1 - - 7.9 ◎ ◎ ◎ Embodiment 1-17 A-2 15 A-22 4 A-29 1 B-13 10 - - C-3 70 - - - - - - 7.8 ◎ ◎ ◎ Embodiment 1-18 A-2 20 A-26 5 A-36 5 B-14 10 - - C-2 40 C-14 20 D-1 1 - - 7.8 ◎ ◎ ◎ Embodiment 1-19 A-2 25 A-25 twenty two - - B-15 3 - - C-10 50 - - D-2 5 - - 6.0 ◎ ◎ ◎ Embodiment 1-20 A-2 20 A-30 2.5 - - B-16 7.5 - - C-13 70 - - - - - - 7.7 ◎ ◎ ◎ Embodiment 1-21 A-3 40 A-31 15 - - B-17 15 - - C-14 30 - - - - - - 8.1 ◎ ◎ ◎ Embodiment 1-22 A-3 twenty two A-37 35 - - B-18 3 - - C-13 40 - - D-2 2 - - 7.9 ◎ ◎ ◎ Embodiment 1-23 A-3 30 A-28 10 - - B-19 20 - - C-9 40 - - - - - - 8.0 ○ ◎ ◎ Embodiment 1-24 A-4 35 A-34 20 - - B-20 15 - - C-13 30 - - - - - - 7.7 ○ ◎ ◎ Embodiment 1-25 A-4 10 A-24 5 - - B-21 15 - - C-5 70 - - D-1 2 - - 8.2 ○ ◎ ◎ Embodiment 1-26 A-17 20 A-29 7 - - B-6 8 - - C-3 65 - - - - - - 7.8 ○ ◎ ◎ Embodiment 1-27 A-2 1 A-16 5 - - B-9 9 - - C-6 85 - - - - - - 7.3 ○ ◎ ◎ Embodiment 1-28 A-1 45 A-17 30 A-26 10 B-4 5 - - C-4 10 - - - - - - 5.6 ◎ ○ ◎ Comparison Example 1-1 A-3 20 A-12 9 A-24 1 - - - - C-5 70 - - - - - - 9.6 ◎ ◎ × Comparison Example 1-2 A-6 20 A-17 20 A-35 20 B-4 0.5 - - C-9 60 - - - - - - 8.9 ◎ ◎ × Comparison Example 1-3 A-2 30 A-16 25 - - B-15 15 - - C-6 30 - - - - - - 3.3 × ◎ ○ Comparison Examples 1-4 - - - - - - B-13 30 - - C-1 70 - - - - - - 6.9 × ◎ ◎ Comparison Examples 1-5 A-9 30 A-11 34 A-32 34 B-12 2 - - - - - - - - - - 5.8 ◎ × ◎ Comparison Example 1-6 A-2 9.05 A-39 ### - - - - - - C-14 69.85 - - D-9 0.50 - - 9.5 ◎ ◎ × Comparison Examples 1-7 A-2 9.33 A-39 ### - - - - - - C-14 68.91 - - D-3 3.63 - - 9.6 ◎ ◎ × Comparison Examples 1-8 - - A-13 100 - - - - - - - - - - D-4 135.14 D-5 35.14 7.3 ◎ × ◎ Comparison Examples 1-9 - - A-31 87.5 - - B-18 ## - - - - - - D-5 75 D-6 75 6.1 ◎ × ◎ Comparison Example 1-10 - - A-30 ### - - B-7 ## - - - - - - D-7 75.68 D-8 94.59 6.6 ◎ × ◎

The details of the (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and the other components (D) described in Table 1 are as follows.

((Poly)oxyalkylene derivatives (A)) A-1 to A-39 listed in Table 2 below were used.

Table 2 Type Addition Form (Poly)oxyalkylene derivatives (A) A-1 — Polyoxyethylene (10) decylamine A-2 — Polyoxyethylene (10) dodecylamine A-3 — Polyoxyethylene (12) dodecylamine A-4 — Polyoxyethylene (15) dodecylamine A-5 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝15)Dodecylamine A-6 Block (Polyoxyethylene)(Polyoxypropylene)(r＋s＝15)Dodecylamine A-7 — Polyoxyethylene (4) octadecylamine A-8 — Polyoxyethylene (10) octadecylamine A-9 Block (Polyoxyethylene)(Polyoxypropylene)(r＋s＝15)octadecylamine A-10 — Polyoxyethylene (5) decyl ether A-11 Block (Polyoxyethylene)(Polyoxypropylene)(r＋s＝7)decyl ether A-12 — Polyoxyethylene (4) dodecyl ether A-13 — Polyoxyethylene (7) dodecyl ether A-14 — Polyoxyethylene (9) dodecyl ether A-15 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝8)C9-C11 alkyl ether A-16 — Polyoxyethylene (3) C12-C13 alkyl ether A-17 — Polyoxyethylene (10) C12-C13 alkyl ether A-18 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝8)C12-C13 alkyl ether A-19 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝10)C12-C13 alkyl ether A-20 — Polyoxyethylene (5) C12-C14 alkyl ether A-21 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝10)tridecyl ether A-22 Polyoxyethylene (10 mol) tridecyl ether A-23 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝8)tridecyl ether A-24 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝8)C11-C14 alkyl ether A-25 — Polyoxyethylene (10) C11-C14 alkyl ether A-26 — Polyoxyethylene (5) stearyl ether A-27 — Polyoxyethylene (10) stearyl ether A-28 — Polyoxyethylene (5) oleyl ether A-29 — Polyoxyethylene (8) oleyl ether A-30 — Polyoxyethylene (10) tetracosyl ether A-31 — Polyoxyethylene (10) dioctadecyl ether A-32 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝20)Hydrogenated castor oil A-33 Block (Polyoxyethylene)(Polyoxypropylene)(r＋s＝50)propylene glycol A-34 Block (Polyoxyethylene)(Polyoxypropylene)(r＋s＝100)propylene glycol A-35 No rules (Polyoxyethylene)(Polyoxypropylene)(r＋s＝50)butyl ether A-36 —／— Polyoxyethylene (10) lauryl ester/polyoxyethylene (10 mol) coconut fatty acid ester = 50/50 A-37 — Polyoxypropylene (10) oleyl ester A-38 — Polyoxyethylene (10) coconut fatty acid ester A-39 — Polyoxyethylene (10) nonylphenyl ether

(Organic acid compound (B)) B-1 to B-21 listed in Table 3 below were used.

table 3 Type Organic acid compounds (B) Number of carboxyl groups Excluding the carbon in the carboxyl group B-1 Oxalic acid/potassium oxalate=50/50 (mass ratio) 2 0 B-2 Malonic acid/sodium malonate=67/33 (mass ratio) 2 1 B-3 Succinic acid 2 2 B-4 Adipic acid 2 4 B-5 Sebacic acid 2 8 B-6 Aspartic acid/aspartic acid diethanolamine salt = 67/33 (mass ratio) 2 2 B-7 Fumaric Anhydride 2 2 B-8 Maleic anhydride 2 2 B-9 Apple acid 2 2 B-10 Citric acid/potassium citrate=67/33 (mass ratio) 3 3 B-11 Nitrilotriacetic acid 3 3 B-12 Ethylenediaminetetraacetic acid/ethylenediaminetetraacetic acid sodium salt = 50/50 (mass ratio) 4 6 B-13 Ethylenediamine disuccinic acid/ethylenediamine disuccinate sodium salt = 50/50 (mass ratio) 4 6 B-14 Diethylenetriamine pentaacetic acid/diethylenetriamine pentaacetic acid sodium salt = 60/40 (mass ratio) 5 9 B-15 Ant acid 1 0 B-16 Acetic acid/sodium acetate=67/33 (mass ratio) 1 1 B-17 Capric acid 1 9 B-18 Lactic acid 1 2 B-19 Lauric acid 1 12 B-20 Oleic acid 1 18 B-21 Octyl Phosphate 0 8

(Organic phosphate compound (C)) C-1 to C-14 listed in Table 4 below were used. The organic phosphate compound (C) listed in Table 4 below is a mixture of organic phosphate and potassium salt of organic phosphate after partial neutralization with KOH. The organic phosphate compounds D-5 and D-6 described below are also the same.

Table 4 Type Compound Name Acid value detected from organic phosphate compound (C) [KOH-mg/g] C-1 Cetyl phosphate and its potassium salt 0.1 C-2 Cetyl phosphate and its potassium salt 12.5 C-3 Cetyl phosphate and its potassium salt 37.5 C-4 Stearyl phosphate and its potassium salt 0.1 C-5 Stearyl phosphate and its potassium salt 12.5 C-6 Stearyl phosphate and its potassium salt 37.5 C-7 Peanut oil phosphate and its potassium salt 12.5 C-8 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 70/30 0.1 C-9 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 70/30 12.5 C-10 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 70/30 37.5 C-11 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 30/70 0.1 C-12 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 30/70 12.5 C-13 Cetyl phosphate and its potassium salt / Stearyl phosphate and its potassium salt = 30/70 37.5 C-14 Stearyl phosphate and its potassium salt 10

The method for measuring the acid value of the organic phosphate compound (C) is as follows.

The organic phosphate compound (C) was dissolved in a mixed solvent of ethanol/xylene = 1/2 (volume ratio), and titrated with a 0.1 mol/L potassium hydroxide methanol standard solution using a potential difference measurement method to calculate the following number 1. The results are shown in the "Acid value detected from the organic phosphate compound (C)" column of Table 4.

Number 1

In number 1, f represents the factor of 0.1 mol/L potassium hydroxide methanol standard solution S represents the amount of organic phosphate compound (C) taken (g) R represents the amount of 0.1 mol/L potassium hydroxide methanol standard solution used up to the inflection point (mL)

(Other ingredients (D)) D-1: Dimethicone D-2: Amino-modified dimethicone D-3: Stearyl alcohol D-4: Polyvinyl alcohol (DP 300, saponification 80) D-5: Hexyl phosphate and its potassium salt D-6: Lauryl phosphate and its potassium salt D-7: Sodium di-tetradecyl sulfosuccinate D-8: Tetraglyceryl monooctadecanoate D-9: Dipotassium hydrogen phosphate

Test Category 2 (Emulsion Stability)

Each treatment agent prepared in Test Type 1 was diluted with warm water at about 70°C to prepare a 1% dilution of the treatment agent. The prepared 1% dilution was left at 50°C for 24 hours, and the appearance of the dilution after leaving was visually confirmed and evaluated using the following criteria. The results are shown in the "Emulsion Stability" column of Table 1.

・Evaluation criteria for emulsion stability ◎ (good): No precipitate is observed and no sedimentation is observed in the lower layer ○ (acceptable): Precipitate is observed or sedimentation is observed in the lower layer, and it disappears when stirred manually with a stirring rod × (poor): Precipitate is observed or sedimentation is observed in the lower layer, and it does not disappear when stirred manually with a stirring rod

Test Category 3 (Adhesion)

5 g of each treatment agent prepared in Test Category 1 was poured into a glass culture dish (inner diameter 9.5 cm). At this time, the treatment agent will spread evenly in the glass culture dish. The temperature was adjusted at 30°C and 70% RH for 24 hours, and the appearance of the treatment agent after temperature adjustment was visually confirmed and evaluated using the following criteria. The results are shown in the "Adhesion" column of Table 1.

・Evaluation criteria for adhesion ◎ (good): The appearance after temperature conditioning is solid and does not feel sticky when touched ○ (acceptable): The appearance after temperature conditioning is solid and feels sticky when touched × (poor): The appearance after temperature conditioning is liquid or gel-like and feels sticky when touched

Test Category 4 (Fiber Strength)

Each treatment agent prepared in test category 1 was diluted with warm water at about 70°C to prepare a 0.5% dilution of the treatment agent. The prepared treatment agent was applied by spraying to polyester fibers (1.3 de × 38 mm) that had not yet been treated with the treatment agent, so that the amount of the treatment agent attached was 0.15% relative to the polyester fiber. The polyester fiber with the treatment agent attached was dried in a dryer at 80°C for 2 hours, and then the initial strength of the fiber was measured using a tensile tester. In addition, the strength of the fiber was measured using a tensile tester after being placed in an atmosphere of 50°C and 80% RH for 3 months. The strength after 3 months was compared with the initial strength and evaluated using the following criteria. The results are shown in the "Fiber Strength" column of Table 1.

・Evaluation criteria for fiber strength ◎ (Good): Strength after 3 months is 95% or more of initial strength ○ (Fair): Strength after 3 months is 90% or more but less than 95% of initial strength × (Poor): Strength after 3 months is less than 90% of initial strength

Test Category 5 (Preparation of the first treatment agent of a two-dose treatment agent)

(First treatment agent (I-A-1)) As shown in Table 5, the first treatment agent (I-A-1) was prepared, which contained 50 parts (%) of polyoxyethylene (10) decylamine (A-1) shown in Table 2 of the (poly)oxyalkylene derivative (A), 20 parts (%) of polyoxyethylene (5) decyl ether (A-10), 14 parts (%) of (polyoxyethylene) (polyoxypropylene) (r+s=10) tridecyl ether (A-21), and 16 parts (%) of oxalic acid/potassium oxalate of the organic acid compound (B) (B-1) at a mass ratio of 50/50.

(1st treatment agent (I-A-2) to (I-A-27), 1st treatment agent (I-B-1) to (I-B-27), 1st treatment agent (I-C-1)) In the same manner as the 1st treatment agent (I-A-1), a (poly)oxyalkylene derivative (A) and an organic acid compound (B) containing the ratio shown in Table 5 were prepared.

The type and content of the (poly)oxyalkylene derivative (A), and the type and content of the organic acid compound (B) are shown in the "(poly)oxyalkylene derivative (A)" column and the "organic acid compound (B)" column of Table 5, respectively.

table 5 First treatment agent (Poly)oxyalkylene derivatives (A) Organic acid compounds (B) Preparation stability of the first treatment agent Type share Type share Type share Type share Type share Ⅰ-A-1 A-1 50 A-10 20 A-21 14 B-1 16 - - ○ Ⅰ-A-2 A-2 50 A-11 7.5 A-38 2.5 B-2 40 - - ○ Ⅰ-A-3 A-2 66.67 A-12 15 A-24 1.67 B-3 16.67 - - ○ Ⅰ-A-4 A-3 58.33 A-13 16.67 A-27 13.33 B-4 11.67 - - ○ Ⅰ-A-5 A-3 43.75 A-14 25 A-26 18.75 B-5 12.5 - - ○ Ⅰ-A-6 A-4 57.14 A-15 10 A-35 28.57 B-6 4.29 - - ○ Ⅰ-A-7 A-4 60 A-16 6.67 - - B-7 33.33 - - ○ Ⅰ-A-8 A-5 73.75 A-17 6.25 A-23 6.25 B-8 13.75 - - ○ Ⅰ-A-9 A-6 60 A-18 25 A-30 8.33 B-9 6.67 - - ○ Ⅰ-A-10 A-7 30 A-19 30 - - B-10 40 - - ○ Ⅰ-A-11 A-8 46.25 A-20 25 A-32 25 B-11 3.75 - - ○ Ⅰ-A-12 A-9 50 A-10 28.57 A-33 14.29 B-12 1.43 B-3 5.71 ○ Ⅰ-A-13 A-2 33.33 A-39 58.33 - - B-12 3.33 B-18 5 ○ Ⅰ-A-14 A-2 60 A-35 10 A-35 20 B-12 1 B-8 9 ○ Ⅰ-A-15 A-2 57.13 A-28 14.29 A-21 14.29 B-12 14.29 - - ○ Ⅰ-A-16 A-2 50 A-22 13.33 A-29 3.33 B-13 33.33 - - ○ Ⅰ-A-17 A-2 50 A-26 12.5 A-36 12.5 B-14 25 - - ○ Ⅰ-A-18 A-2 50 A-25 44 - - B-15 6 - - ○ Ⅰ-A-19 A-2 66.67 A-30 8.33 - - B-16 25 - - ○ Ⅰ-A-20 A-3 57.14 A-31 21.43 - - B-17 21.43 - - ○ Ⅰ-A-21 A-3 36.67 A-37 58.33 - - B-18 5 - - ○ Ⅰ-A-22 A-3 50 A-28 16.67 - - B-19 33.33 - - ○ Ⅰ-A-23 A-4 50 A-34 28.57 - - B-20 21.43 - - ○ Ⅰ-A-24 A-4 33.33 A-24 16.67 - - B-21 50 - - ○ Ⅰ-A-25 A-17 57.14 A-29 20 - - B-6 22.86 - - ○ Ⅰ-A-26 A-2 6.67 A-16 33.33 - - B-9 60 - - ○ Ⅰ-A-27 A-1 50 A-17 33.33 A-26 11.11 B-4 5.56 - - ○ Ⅰ-B-1 A-1 59.52 A-10 23.81 A-21 16.67 - - - - ○ Ⅰ-B-2 A-2 83.33 A-11 12.50 A-38 4.17 - - - - ○ Ⅰ-B-3 A-2 80 A-12 18 A-24 2 - - - - ○ Ⅰ-B-4 A-3 66.04 A-13 18.87 A-27 15.09 - - - - ○ Ⅰ-B-5 A-3 50 A-14 29 A-26 21.43 - - - - ○ Ⅰ-B-6 A-4 59.70 A-15 10.45 A-35 29.85 - - - - ○ Ⅰ-B-7 A-4 90 A-16 10 - - - - - - ○ Ⅰ-B-8 A-5 85.51 A-17 7.25 A-23 7.25 - - - - ○ Ⅰ-B-9 A-6 64.29 A-18 26.79 A-30 8.93 - - - - ○ Ⅰ-B-10 A-7 50 A-19 50 - - - - - - ○ Ⅰ-B-11 A-8 48.05 A-20 25.97 A-32 25.97 - - - - ○ Ⅰ-B-12 A-9 53.85 A-10 30.77 A-33 15.38 - - - - ○ Ⅰ-B-13 A-2 36.36 A-39 63.64 - - - - - - ○ Ⅰ-B-14 A-2 66.67 A-35 11.11 A-35 22.22 - - - - ○ Ⅰ-B-15 A-2 66.67 A-28 16.67 A-21 16.67 - - - - ○ Ⅰ-B-16 A-2 75 A-22 20 A-29 5 - - - - ○ Ⅰ-B-17 A-2 66.67 A-26 16.67 A-36 16.67 - - - - ○ Ⅰ-B-18 A-2 53.19 A-25 46.81 - - - - - - ○ Ⅰ-B-19 A-2 88.89 A-30 11.11 - - - - - - ○ Ⅰ-B-20 A-3 72.73 A-31 27.27 - - - - - - ○ Ⅰ-B-21 A-3 38.6 A-37 61.4 - - - - - - ○ Ⅰ-B-22 A-3 75 A-28 25 - - - - - - ○ Ⅰ-B-23 A-4 63.64 A-34 36.36 - - - - - - ○ Ⅰ-B-24 A-4 66.67 A-24 33.33 - - - - - - ○ Ⅰ-B-25 A-17 74.07 A-29 25.93 - - - - - - ○ Ⅰ-B-26 A-2 16.67 A-16 83.33 - - - - - - ○ Ⅰ-B-27 A-1 52.95 A-17 35.29 A-26 11.76 - - - - ○ Ⅰ-C-1 A-1 55.55 A-10 22.22 A-21 15.56 B-1 6.67 - - ○

Test Category 6 (Preparation of the second treatment agent of a two-dose treatment agent)

(Second treatment agent (II-A-1)) As shown in Table 6, the second treatment agent (II-A-1) was prepared, which contained 100 parts (%) of cetyl phosphate and its potassium salt (C-1) of the organic phosphate compound (C).

(Second treatment agent (II-A-2) to (II-A-16), second treatment agent (II-B-1) to (II-B-27), second treatment agent (II-C-1)) In the same manner as the second treatment agent (II-A-1), an organic phosphate compound (C) and an organic acid compound (B) containing the ratio shown in Table 6 were prepared.

The type and content of the organic phosphate compound (C), and the type and content of the organic acid compound (B) are shown in the "Organic phosphate compound (C)" column and the "Organic acid compound (B)" column of Table 6, respectively.

Table 6 Second treatment agent Organic acid compounds (B) Organic phosphate compounds (C) Preparation stability of the second treatment agent Type share Type share Type share Type share Ⅱ-A-1 - - - - C-1 100 - - ○ Ⅱ-A-2 - - - - C-2 100 - - ○ Ⅱ-A-3 - - - - C-3 100 - - ○ Ⅱ-A-4 - - - - C-4 100 - - ○ Ⅱ-A-5 - - - - C-5 100 - - ○ Ⅱ-A-6 - - - - C-6 100 - - ○ Ⅱ-A-7 - - - - C-7 100 - - ○ Ⅱ-A-8 - - - - C-8 100 - - ○ Ⅱ-A-9 - - - - C-9 100 - - ○ Ⅱ-A-10 - - - - C-10 100 - - ○ Ⅱ-A-11 - - - - C-11 100 - - ○ Ⅱ-A-12 - - - - C-12 100 - - ○ Ⅱ-A-13 - - - - C-13 100 - - ○ Ⅱ-A-14 - - - - C-14 100 - - ○ Ⅱ-A-15 - - - - C-5 92.86 C-7 7.14 ○ Ⅱ-A-16 - - - - C-2 66.67 C-14 33.33 ○ Ⅱ-B-1 B-1 13.79 - - C-3 86.21 - - ○ Ⅱ-B-2 B-2 9.09 - - C-6 90.91 - - ○ Ⅱ-B-3 B-3 6.67 - - C-5 93.33 - - ○ Ⅱ-B-4 B-4 14.89 - - C-6 85.11 - - ○ Ⅱ-B-5 B-5 33.33 - - C-1 66.67 - - ○ Ⅱ-B-6 B-6 9.09 - - C-12 90.91 - - ○ Ⅱ-B-7 B-7 12.50 - - C-5 81.25 C-7 6.25 ○ Ⅱ-B-8 B-8 8.4 - - C-14 91.6 - - ○ Ⅱ-B-9 B-9 9.09 - - C-2 90.91 - - ○ Ⅱ-B-10 B-10 28.57 - - C-7 71.43 - - ○ Ⅱ-B-11 B-11 13.04 - - C-2 86.96 - - ○ Ⅱ-B-12 B-12 2.86 B-3 11.43 C-8 85.71 - - ○ Ⅱ-B-13 B-12 4.44 B-18 6.67 C-5 88.89 - - ○ Ⅱ-B-14 B-12 0.91 B-8 8.18 C-5 90.91 - - ○ Ⅱ-B-15 B-12 25 - - C-11 75 - - ○ Ⅱ-B-16 B-13 13 - - C-3 88 - - ○ Ⅱ-B-17 B-14 14.29 - - C-2 57.14 C-14 28.57 ○ Ⅱ-B-18 B-15 5.66 - - C-10 94.34 - - ○ Ⅱ-B-19 B-16 9.68 - - C-13 90.32 - - ○ Ⅱ-B-20 B-17 33.33 - - C-14 66.67 - - ○ Ⅱ-B-21 B-18 6.98 - - C-13 93.02 - - ○ Ⅱ-B-22 B-19 33.33 - - C-9 66.67 - - ○ Ⅱ-B-23 B-20 33.33 - - C-13 66.67 - - ○ Ⅱ-B-24 B-21 17.65 - - C-5 82.35 - - ○ Ⅱ-B-25 B-6 10.96 - - C-3 89.04 - - ○ Ⅱ-B-26 B-9 9.57 - - C-6 90.43 - - ○ Ⅱ-B-27 B-4 33.33 - - C-4 66.67 - - ○ Ⅱ-C-1 B-1 9.09 - - C-3 90.91 - - ○

Test Category 7 (Evaluation of Stability of Preparations)

・Evaluation of formulation stability of the first treatment agent Each of the first treatment agents listed in test category 5 was stored at 25°C for 3 days. The formulation stability was evaluated using the following criteria. The results are shown in the "Preparation stability" column of Table 5.

・Evaluation of formulation stability of the second treatment agent A composition containing each second treatment agent listed in Test Category 6 and water as a solvent (S) (mass ratio of second treatment agent: water = 40:60) was stored at 25°C for 3 days. The formulation stability was evaluated using the following criteria. The results are shown in the "Preparation Stability" column of Table 6.

・Evaluation criteria for formulation stability (composition containing the first treatment agent and the second treatment agent) ○ (good): not gelled and not cured × (unacceptable): already gelled or cured

Test Category 8 (Preparation of a treatment agent consisting of a first treatment agent and a second treatment agent)

(Example 2-A-1) The treatment agent of Example 2-A-1 was prepared by mixing 50% (parts) of the first treatment agent (I-A-1) and 50% (parts) of the second treatment agent (II-A-3) shown in Table 7, and also mixing 3 parts of the treatment agent (III-1) of the other treatment agent (D) shown in Table 8 (relative to 100 parts of the total of the first treatment agent and the second treatment agent).

(Examples (2-A-2) to (2-A-28), Examples (2-B-1) to (2-B-28), Examples (2-C-1) to (2-C-2)) The treatment agents of each example were prepared in the same manner as in Example 2-A-1. In addition to mixing the first treatment agent and the second treatment agent shown in Table 7, other treatment agents (D) shown in Table 8 were mixed as needed.

The type and mass ratio of the first treatment agent, the type and mass ratio of the second treatment agent, and the type and mass ratio of the other treatment agent (D) are shown in the "First treatment agent (I)" column, the "Second treatment agent (II)" column, and the "Other treatment agent (D)" column of Table 7, respectively. The content of the other treatment agent (D) indicates the blending amount (parts) when the total blending amount of the first treatment agent and the second treatment agent is 100 parts.

(pH measurement) The first treatment agent and the second treatment agent shown in Table 7 were mixed and diluted with warm water at about 70°C to prepare a 5% water dilution of the treatment agent. In the case of using another treatment agent (D), the first treatment agent, the second treatment agent, and the other treatment agent (D) were mixed and diluted with warm water at about 70°C to prepare a 5% water dilution of the treatment agent. The pH of the 5% water dilution prepared in each case was measured at 25°C. The measured values are shown in the "pH of 5% water dilution" column of Table 7.

Table 7 2-dose treatment agent First treatment agent (Ⅰ) Second treatment agent (Ⅱ) Other treatment agents (D) pH of 5% water dilution Emulsion stability Adhesion Fiber strength Type share Type share Type Relative to the total of 100 copies of the first and second treatment agents Example 2-A-1 Ⅰ-A-1 50 Ⅱ-A-3 50 III-1 3 8.2 ◎ ◎ ◎ Example 2-A-2 Ⅰ-A-1 50 Ⅱ-A-3 50 - - 8.2 ◎ ◎ ◎ Example 2-A-3 Ⅰ-A-2 20 Ⅱ-A-6 80 III-1 5 8.5 ◎ ◎ ◎ Example 2-A-4 Ⅰ-A-3 30 Ⅱ-A-5 70 III-2 3 8.1 ◎ ◎ ◎ Example 2-A-5 Ⅰ-A-4 60 Ⅱ-A-6 40 III-2 4 7.8 ◎ ◎ ◎ Example 2-A-6 Ⅰ-A-5 80 Ⅱ-A-1 20 - - 5.7 ◎ ◎ ◎ Example 2-A-7 Ⅰ-A-6 70 Ⅱ-A-12 30 - - 6.9 ◎ ◎ ◎ Example 2-A-8 Ⅰ-A-7 30 Ⅱ-A-15 70 III-1 3 6.1 ◎ ◎ ◎ Example 2-A-9 Ⅰ-A-8 40 Ⅱ-A-14 60 III-3 5 8.3 ◎ ◎ ◎ Example 2-A-10 Ⅰ-A-9 60 Ⅱ-A-2 40 III-4 2 7.5 ◎ ◎ ◎ Example 2-A-11 Ⅰ-A-10 50 Ⅱ-A-7 50 - - 5.5 ◎ ◎ ◎ Example 2-A-12 Ⅰ-A-11 80 Ⅱ-A-8 20 - - 7.3 ◎ ◎ ◎ Example 2-A-13 Ⅰ-A-12 70 Ⅱ-A-2 30 - - 7.4 ◎ ◎ ◎ Example 2-A-14 Ⅰ-A-13 60 Ⅱ-A-5 40 - - 8.1 ◎ ◎ ◎ Example 2-A-15 Ⅰ-A-14 50 Ⅱ-A-5 50 - - 7.6 ◎ ◎ ◎ Example 2-A-16 Ⅰ-A-15 70 Ⅱ-A-11 30 III-2 1 7.9 ◎ ◎ ◎ Example 2-A-17 Ⅰ-A-16 30 Ⅱ-A-3 70 - - 7.8 ◎ ◎ ◎ Example 2-A-18 Ⅰ-A-17 40 Ⅱ-A-16 60 III-1 1 7.8 ◎ ◎ ◎ Example 2-A-19 Ⅰ-A-18 50 Ⅱ-A-10 50 III-2 5 6.0 ◎ ◎ ◎ Example 2-A-20 Ⅰ-A-19 30 Ⅱ-A-13 70 - - 7.7 ◎ ◎ ◎ Example 2-A-21 Ⅰ-A-20 70 Ⅱ-A-14 30 - - 8.1 ◎ ◎ ◎ Example 2-A-22 Ⅰ-A-21 60 Ⅱ-A-13 40 III-2 2 7.9 ◎ ◎ ◎ Example 2-A-23 Ⅰ-A-22 60 Ⅱ-A-9 40 - - 8.0 ○ ◎ ◎ Example 2-A-24 Ⅰ-A-23 70 Ⅱ-A-13 30 - - 7.7 ○ ◎ ◎ Example 2-A-25 Ⅰ-A-24 30 Ⅱ-A-5 70 III-1 2 8.2 ○ ◎ ◎ Example 2-A-26 Ⅰ-A-25 35 Ⅱ-A-3 65 - - 7.8 ○ ◎ ◎ Example 2-A-27 Ⅰ-A-26 15 Ⅱ-A-6 85 - - 7.3 ○ ◎ ◎ Example 2-A-28 Ⅰ-A-27 90 Ⅱ-A-4 10 - - 5.6 ◎ ○ ◎ Example 2-B-1 Ⅰ-B-1 42 Ⅱ-B-1 58 III-1 3 8.2 ◎ ◎ ◎ Example 2-B-2 Ⅰ-B-1 42 Ⅱ-B-1 58 - - 8.2 ◎ ◎ ◎ Example 2-B-3 Ⅰ-B-2 12 Ⅱ-B-2 88 III-1 5 8.5 ◎ ◎ ◎ Example 2-B-4 Ⅰ-B-3 25 Ⅱ-B-3 75 III-2 3 8.1 ◎ ◎ ◎ Example 2-B-5 Ⅰ-B-4 53 Ⅱ-B-4 47 III-2 4 7.8 ◎ ◎ ◎ Example 2-B-6 Ⅰ-B-5 70 Ⅱ-B-5 30 - - 5.7 ◎ ◎ ◎ Example 2-B-7 Ⅰ-B-6 67 Ⅱ-B-6 33 - - 6.9 ◎ ◎ ◎ Example 2-B-8 Ⅰ-B-7 20 Ⅱ-B-7 80 III-1 3 6.1 ◎ ◎ ◎ Example 2-B-9 Ⅰ-B-8 34.5 Ⅱ-B-8 65.5 III-3 5 8.3 ◎ ◎ ◎ Example 2-B-10 Ⅰ-B-9 56 Ⅱ-B-9 44 III-4 2 7.5 ◎ ◎ ◎ Example 2-B-11 Ⅰ-B-10 30 Ⅱ-B-10 70 - - 5.5 ◎ ◎ ◎ Example 2-B-12 Ⅰ-B-11 77 Ⅱ-B-11 twenty three - - 7.3 ◎ ◎ ◎ Example 2-B-13 Ⅰ-B-12 65 Ⅱ-B-12 35 - - 7.4 ◎ ◎ ◎ Example 2-B-14 Ⅰ-B-13 55 Ⅱ-B-13 45 - - 8.1 ◎ ◎ ◎ Example 2-B-15 Ⅰ-B-14 45 Ⅱ-B-14 55 - - 7.6 ◎ ◎ ◎ Example 2-B-16 Ⅰ-B-15 60 Ⅱ-B-15 40 III-2 1 7.9 ◎ ◎ ◎ Example 2-B-17 Ⅰ-B-16 20 Ⅱ-B-16 80 - - 7.8 ◎ ◎ ◎ Example 2-B-18 Ⅰ-B-17 30 Ⅱ-B-17 70 III-1 1 7.8 ◎ ◎ ◎ Example 2-B-19 Ⅰ-B-18 45 Ⅱ-B-18 55 III-2 5 6.0 ◎ ◎ ◎ Example 2-B-20 Ⅰ-B-19 22.5 Ⅱ-B-19 77.5 - - 7.7 ◎ ◎ ◎ Example 2-B-21 Ⅰ-B-20 55 Ⅱ-B-20 45 - - 8.1 ◎ ◎ ◎ Example 2-B-22 Ⅰ-B-21 57 Ⅱ-B-21 43 III-2 2 7.9 ◎ ◎ ◎ Example 2-B-23 Ⅰ-B-22 40 Ⅱ-B-22 60 - - 8.0 ○ ◎ ◎ Example 2-B-24 Ⅰ-B-23 55 Ⅱ-B-23 45 - - 7.7 ○ ◎ ◎ Example 2-B-25 Ⅰ-B-24 15 Ⅱ-B-24 85 III-1 2 8.2 ○ ◎ ◎ Example 2-B-26 Ⅰ-B-25 27 Ⅱ-B-25 73 - - 7.8 ○ ◎ ◎ Example 2-B-27 Ⅰ-B-26 6 Ⅱ-B-26 94 - - 7.3 ○ ◎ ◎ Example 2-B-28 Ⅰ-B-27 85 Ⅱ-B-27 15 - - 5.6 ◎ ○ ◎ Example 2-C-1 Ⅰ-C-1 45 Ⅱ-C-1 55 III-1 3 8.2 ◎ ◎ ◎ Example 2-C-2 Ⅰ-C-1 45 Ⅱ-C-1 55 - - 8.2 ◎ ◎ ◎

The other treatment agents (D) listed in Table 7 are treatment agents (III-1) to (III-4) listed in Table 8 below. Treatment agents (III-1) to (III-4) are prepared so as to contain the other treatment agents (D) at the ratios shown in Table 8.

Table 8 Other treatment agents (D) Type share Type share III-1 D-1 100 - - III-2 D-2 100 - - III-3 D-1 60 D-2 40 III-4 D-1 50 D-2 50

Test Category 9 (Evaluation of 2-dose treatment agents)

The treatment agents of each example were used to evaluate emulsion stability, adhesion, and fiber strength in the same manner as in Example 1. The preparation method of the dilution used for the evaluation of emulsion stability and fiber strength was the same as that described in the (pH measurement) column of Test Category 8. The first treatment agent, the second treatment agent, and other treatment agents (D) as needed were mixed and then diluted with water to prepare a dilution of the treatment agent. The results are shown in the "emulsion stability" column, the "adhesion" column, and the "fiber strength" column of Table 7, respectively.

It is clear from the evaluation results of each embodiment relative to the comparative example in each table that the treatment agent of the present invention can improve the emulsification stability when made into a water-diluted solution. In addition, it can reduce the adhesion of the treatment agent to the fiber surface and inhibit the reduction of fiber strength.

This disclosure also includes the following forms.

(Appendix 1) A treatment agent for polyester-based synthetic fibers, comprising a (poly)oxyalkylene derivative (A), the following organic acid compound (B), and the following organic phosphate compound (C); Its characteristics are: The pH of a 5 mass% aqueous dilution of the treatment agent for polyester-based synthetic fibers at 25°C is 5.5 or more and 8.5 or less; Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides; Organic phosphate compound (C): at least one selected from organic phosphates having a alkyl group with a carbon number of 16 or more and 20 or less in the molecule, and salts thereof.

(Appendix 2) The treating agent for polyester-based synthetic fibers as described in Appendix 1, wherein the organic acid compound (B) is at least one selected from a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, a salt of a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, and a divalent to pentavalent carboxylic acid anhydride having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group.

(Appendix 3) The treating agent for polyester-based synthetic fibers as described in Appendix 1, wherein the (poly)oxyalkylene derivative (A) comprises at least one selected from polyoxyalkylene alkylamine and polyoxyalkylene alkenylamine.

(Appendix 4) The polyester synthetic fiber treating agent as described in Appendix 1, wherein when the total content of the above-mentioned (poly)oxyalkylene derivative (A), the above-mentioned organic acid compound (B), and the above-mentioned organic phosphate compound (C) is set to 100 parts by mass, the following proportions are contained: the total content of the above-mentioned (poly)oxyalkylene derivative (A) and the above-mentioned organic acid compound (B) is 20 parts by mass or more and 80 parts by mass or less, and the above-mentioned organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less.

(Appendix 5) The treating agent for polyester-based synthetic fibers as described in Appendix 1, wherein it is composed of a first treating agent for polyester-based synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a second treating agent for polyester-based synthetic fibers containing the above-mentioned organic phosphate compound (C); either or both of the above-mentioned first treating agent for polyester-based synthetic fibers and the above-mentioned second treating agent for polyester-based synthetic fibers contain the above-mentioned organic acid compound (B).

(Appendix 6) The treating agent for polyester synthetic fibers as described in Appendix 1, wherein the polyester synthetic fibers are polyester staple fibers.

(Appendix 7) The treating agent for polyester synthetic fibers as described in Appendix 1, wherein the polyester synthetic fibers are for spinning.

(Appendix 8) A composition containing a treatment agent for polyester-based synthetic fibers, characterized in that: It contains the treatment agent for polyester-based synthetic fibers described in any one of Appendices 1 to 7 and the following solvent (S); Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure.

(Appendix 9) A first treatment agent for polyester synthetic fibers, which contains a (poly)oxyalkylene derivative (A) and is used together with a second treatment agent for polyester synthetic fibers or a composition containing the second treatment agent for polyester synthetic fibers; The second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); The composition containing the second treatment agent for polyester synthetic fibers contains the second treatment agent for polyester synthetic fibers and the following solvent (S); Its characteristics are: Either or both of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers contain the following organic acid compound (B); When the mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers is set to a 5 mass% aqueous dilution, the pH at 25°C is 5.5 or more and 8.5 or less; Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides; Organic phosphate compound (C): at least one selected from organic phosphates having a carbon number of 16 or more and 20 or less in the molecule, and their salts; Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure.

(Appendix 10) A composition containing a first treatment agent for polyester-based synthetic fibers, characterized in that: It contains the first treatment agent for polyester-based synthetic fibers described in Appendix 9 and the following solvent (S); Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure.

(Appendix 11) A second treatment agent for polyester synthetic fibers, which contains the following organic phosphate compound (C) and is used together with a first treatment agent for polyester synthetic fibers or a composition containing the first treatment agent for polyester synthetic fibers; The first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); The composition containing the first treatment agent for polyester synthetic fibers contains the first treatment agent for polyester synthetic fibers and the following solvent (S); Its characteristics are: Either or both of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers contain the following organic acid compound (B); When the mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers is set to a 5 mass% aqueous dilution, the pH at 25°C is 5.5 or more and 8.5 or less; Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides; Organic phosphate compound (C): at least one selected from organic phosphates having a carbon number of 16 or more and 20 or less in the molecule, and their salts; Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure.

(Appendix 12) A composition containing a second treatment agent for polyester synthetic fibers, characterized in that: It contains the second treatment agent for polyester synthetic fibers described in Appendix 11 and the following solvent (S); Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure.

(Appendix 13) A dilute solution of a polyester synthetic fiber treatment agent, characterized in that: It contains the polyester synthetic fiber treatment agent described in any one of Appendices 1 to 7, wherein the concentration of the polyester synthetic fiber treatment agent is not less than 0.1 mass % and not more than 10 mass %.

(Appendix 14) A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers; The dilute solution of the polyester synthetic fiber treating agent is obtained by adding the polyester synthetic fiber treating agent described in any one of Appendices 1 to 7 to water.

(Appendix 15) A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers; The dilute solution of the polyester synthetic fiber treating agent is obtained by adding the composition containing the polyester synthetic fiber treating agent described in Appendix 8 to water.

(Appendix 16) A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a treatment agent for polyester synthetic fibers is applied to the polyester synthetic fibers; The dilute solution of the treatment agent for polyester synthetic fibers is obtained by adding the first treatment agent for polyester synthetic fibers described in Appendix 9 or the composition containing the first treatment agent for polyester synthetic fibers described in Appendix 10, the second treatment agent for polyester synthetic fibers described in Appendix 11 or the composition containing the second treatment agent for polyester synthetic fibers described in Appendix 12 to water.

(Appendix 17) A polyester synthetic fiber characterized by: Attached with a polyester synthetic fiber treatment agent as described in any one of Appendices 1 to 7.

Claims (17)

A treatment agent for polyester synthetic fibers, which contains 5 mass% or more of a (poly)oxyalkylene derivative (A), 1 mass% or more of the following organic acid compound (B), and 5 mass% or more of the following organic phosphate compound (C), characterized in that: The pH of a 5 mass% aqueous dilution of the above-mentioned treatment agent for polyester synthetic fibers (without solvent) at 25°C is 5.5 or more and 8.5 or less, Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides, Organic phosphate compound (C): at least one selected from organic phosphates having a carbon number of 16 or more and 20 or less in the molecule, and salts thereof. The polyester synthetic fiber treatment agent as described in claim 1, wherein the organic acid compound (B) is at least one selected from a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, a salt of a monovalent to pentavalent carboxylic acid having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group, and a divalent to pentavalent carboxylic acid anhydride having a carbon number of 0 to 9 excluding the carbon derived from the carboxyl group. The treating agent for polyester-based synthetic fibers as described in claim 1, wherein the (poly)oxyalkylene derivative (A) comprises at least one selected from polyoxyalkylene alkylamine and polyoxyalkylene alkenylamine. A polyester synthetic fiber treatment agent as described in claim 1, wherein When the total content of the (poly)oxyalkylene derivative (A), the organic acid compound (B), and the organic phosphate compound (C) is 100 parts by mass, the following proportions are contained: the total content of the (poly)oxyalkylene derivative (A) and the organic acid compound (B) is 20 parts by mass or more and 80 parts by mass or less, and the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less. The treatment agent for polyester synthetic fibers as described in claim 1, wherein it is composed of a first treatment agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a second treatment agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C), either or both of the above-mentioned first treatment agent for polyester synthetic fibers and the above-mentioned second treatment agent for polyester synthetic fibers contain the above-mentioned organic acid compound (B). The treating agent for polyester synthetic fibers as described in claim 1, wherein the polyester synthetic fibers are polyester staple fibers. The treating agent for polyester synthetic fibers as described in claim 1, wherein the polyester synthetic fibers are used for spinning. A composition containing a treatment agent for polyester-based synthetic fibers, characterized in that: It contains the treatment agent for polyester-based synthetic fibers described in any one of claims 1 to 7 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure. A first treatment agent for polyester synthetic fibers, which contains a (poly)oxyalkylene derivative (A) and is used together with a second treatment agent for polyester synthetic fibers or a composition containing the second treatment agent for polyester synthetic fibers, The second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C), The composition containing the second treatment agent for polyester synthetic fibers contains the second treatment agent for polyester synthetic fibers and the following solvent (S), Its characteristics are: Either or both of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers contain the following organic acid compound (B), When the mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers (without solvent) is set to a 5 mass% aqueous dilution, the pH at 25°C is 5.5 or more and 8.5 or less. The mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers (without solvent) contains 5 mass% or more of the (poly)oxyalkylene derivative (A), 1 mass% or more of the organic acid compound (B), and 5 mass% or more of the organic phosphate compound (C). Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides. Organic phosphate compound (C): at least one selected from organic phosphates having a alkyl group with a carbon number of 16 or more and 20 or less in the molecule, and salts thereof. Solvent (S): A solvent with a boiling point below 105°C under atmospheric pressure. A composition containing a first treatment agent for polyester-based synthetic fibers, characterized in that: It contains the first treatment agent for polyester-based synthetic fibers described in claim 9 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure. A second treatment agent for polyester synthetic fibers, which contains the following organic phosphate compound (C) and is used together with a first treatment agent for polyester synthetic fibers or a composition containing the first treatment agent for polyester synthetic fibers, The first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A), The composition containing the first treatment agent for polyester synthetic fibers contains the first treatment agent for polyester synthetic fibers and the following solvent (S), Its characteristics are: Either or both of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers contain the following organic acid compound (B), When the mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers (without solvent) is set to a 5 mass% aqueous dilution, the pH at 25°C is 5.5 or more and 8.5 or less. The mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers (without solvent) contains 5 mass% or more of the (poly)oxyalkylene derivative (A), 1 mass% or more of the organic acid compound (B), and 5 mass% or more of the organic phosphate compound (C). Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides. Organic phosphate compound (C): at least one selected from organic phosphates having a alkyl group with a carbon number of 16 or more and 20 or less in the molecule, and salts thereof. Solvent (S): A solvent with a boiling point below 105°C under atmospheric pressure. A composition containing a second treatment agent for polyester-based synthetic fibers, characterized in that: It contains the second treatment agent for polyester-based synthetic fibers described in claim 11 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105°C or less under atmospheric pressure. A dilute solution of a polyester synthetic fiber treatment agent, characterized in that: It contains the polyester synthetic fiber treatment agent described in any one of claims 1 to 7, and the concentration of the polyester synthetic fiber treatment agent is 0.1 mass % or more and 10 mass % or less. A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers, The dilute solution of the polyester synthetic fiber treating agent is obtained by adding the polyester synthetic fiber treating agent described in any one of claims 1 to 7 to water. A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers, The dilute solution of the polyester synthetic fiber treating agent is obtained by adding the composition containing the polyester synthetic fiber treating agent described in claim 8 to water. A method for treating polyester synthetic fibers, characterized in that: A dilute solution of a polyester synthetic fiber treatment agent is applied to the polyester synthetic fibers, The dilute solution of the polyester synthetic fiber treatment agent is obtained by adding the first polyester synthetic fiber treatment agent described in claim 9 or the composition containing the first polyester synthetic fiber treatment agent described in claim 10, the second polyester synthetic fiber treatment agent described in claim 11 or the composition containing the second polyester synthetic fiber treatment agent described in claim 12 to water. A polyester synthetic fiber characterized by: Attached with a polyester synthetic fiber treating agent as described in any one of claims 1 to 7.