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, and a composition containing the second treatment agent for polyester synthetic fibers, diluent for treatment agent for polyester-based synthetic fibers, method for treating polyester-based synthetic fibers, and polyester-based synthetic fibers

Abstract

The present invention addresses the problem of providing a polyester-based synthetic fiber treatment agent or the like which can improve the emulsion stability when the synthetic fiber treatment agent is used as a water diluent, can reduce the adhesion of the fiber surface to which the synthetic fiber treatment agent is applied, and can suppress the decrease in fiber strength. This treatment agent for polyester-based synthetic fibers 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 ester compound (C). A 5% by mass water diluent of the treatment agent (not containing a solvent) for polyester synthetic fibers has a pH of 5.5 to 8.5 at 25 DEG 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 organophosphoric acid ester compound (C) is at least one selected from the group consisting of organophosphoric acid esters having a hydrocarbon group having 16-20 carbon atoms in the molecule and salts thereof.

Description

Technical Field

[0001] 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 diluent of the treatment agent for polyester synthetic fibers, a method for treating polyester synthetic fibers, and polyester synthetic fibers. Background Art

[0002] For example, in the spinning and drawing step or finishing step of synthetic fibers, a synthetic fiber treatment agent may be attached to the fiber surface from the viewpoint of reducing friction, antistatic properties, and bundling properties of the synthetic fibers.

[0003] At present, 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 predetermined alkyl group, a predetermined surfactant, and a predetermined phosphate metal salt in a predetermined 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 predetermined alkyl phosphate ester, a predetermined surfactant, and a monohydric aliphatic alcohol having a predetermined alkyl group in a predetermined ratio. Patent Document 3 discloses a fiber treatment agent for spinning, which contains an A component composed of polyvinyl alcohol or its derivatives as an essential component and a B component composed of an alkyl phosphate ester potassium salt or a polyoxyalkylene alkyl phosphate ester potassium salt having a predetermined alkyl group, wherein the A component and the B component are mixed in a predetermined ratio. Patent Document 4 discloses a treatment agent for polyolefin-based synthetic fibers, which contains a predetermined organic acid, two types of alkyl phosphate salts, and a polyoxyalkylene derivative in a predetermined 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 predetermined nonionic surfactant, a dialkyl sulfosuccinate having an alkyl group with 8 to 16 carbon atoms, and a polyglycerol fatty acid ester in a predetermined ratio. Prior art literature

[0004] Patent Literature 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 Application Publication No. 2018-31090 Summary of the invention Problems to be solved by the invention

[0005] However, in conventional synthetic fiber treatment agents, when the synthetic fiber treatment agent is diluted in water, the emulsion stability may be reduced, resulting in the generation of precipitates, etc. In addition, the adhesion of the fiber surface to which the synthetic fiber treatment agent is applied may be increased, resulting in spinning defects. In addition, the strength of the synthetic fiber treatment agent applied to the fiber may be reduced, resulting in process failure. Means for solving problems

[0006] The present inventors have conducted studies to solve the above problems and have found that a polyester synthetic fiber treating agent containing a (poly)oxyalkylene derivative (A), a predetermined organic acid compound (B), and a predetermined organic phosphate compound (C) and having a predetermined pH value has a particularly good effect.

[0007] Various means for solving the above-mentioned problems are described. Mode 1 is a processing agent for polyester-based synthetic fibers, comprising 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), wherein the pH of a 5% by mass aqueous dilution of the processing agent for polyester-based synthetic fibers (containing no 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 an organic phosphate having a hydrocarbon group having 16 or more and 20 or less carbon atoms in the molecule, and a salt thereof.

[0008] Embodiment 2 is a processing agent for polyester-based synthetic fibers as described in Embodiment 1, wherein the organic acid compound (B) is at least one selected from mono- to pentacarboxylic acids having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups, salts of mono- to pentacarboxylic acids having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups, and di- to pentacarboxylic acid anhydrides having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups.

[0009] Aspect 3 is the processing agent for polyester-based synthetic fibers according to aspect 1 or 2, wherein the (poly)oxyalkylene derivative (A) contains at least one selected from the group consisting of polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines.

[0010] Embodiment 4 is a processing agent for polyester-based synthetic fibers as described in any one of Embodiments 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 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 content of the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less.

[0011] Mode 5 is a processing agent for polyester synthetic fibers as described in any one of Modes 1 to 4, wherein the processing agent is composed of: a first processing agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a second processing agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C); and either or both of the above-mentioned first processing agent for polyester synthetic fibers and the above-mentioned second processing agent for polyester synthetic fibers contain the above-mentioned organic acid compound (B).

[0012] Aspect 6 is the processing 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 processing agent for polyester synthetic fibers according to any one of aspects 1 to 6, wherein the polyester synthetic fibers are for spinning.

[0013] Embodiment 8 is a composition containing a polyester synthetic fiber treatment agent, the key point of which is that it contains the polyester synthetic fiber treatment agent described in any one of Embodiments 1 to 7 and the following solvent (S); and the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0014] Embodiment 9 is a first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination 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 comprises the following organic phosphate compound (C); the composition containing the second treatment agent for polyester synthetic fibers comprises the second treatment agent for polyester synthetic fibers and the following solvent (S); the key point is that: 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 (excluding The invention relates to a method for preparing the polyester-based synthetic fiber comprising: preparing the polyester-based synthetic fiber and the polyester-based synthetic fiber as a first treatment agent, wherein the first treatment agent is a polyester-based synthetic fiber and the second treatment agent is a polyester-based synthetic fiber. The ...

[0015] Method 10 is a composition containing the first treatment agent for polyester synthetic fibers, the key points of which are: containing the first treatment agent for polyester synthetic fibers described in Method 9 and the following solvent (S); and the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0016] Embodiment 11 is a second treatment agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a first treatment agent for polyester synthetic fibers or a composition comprising the first treatment agent for polyester synthetic fibers; the first treatment agent for polyester synthetic fibers comprises a (poly)oxyalkylene derivative (A); the composition comprising the first treatment agent for polyester synthetic fibers comprises the first treatment agent for polyester synthetic fibers and the following solvent (S); the key point is that: 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 (excluding The invention relates to a method for preparing the polyester-based synthetic fiber comprising: preparing the polyester-based synthetic fiber and the polyester-based synthetic fiber as a first treatment agent, wherein the first treatment agent is a polyester-based synthetic fiber and the second treatment agent is a polyester-based synthetic fiber. The ...

[0017] Method 12 is a composition containing a second treatment agent for polyester synthetic fibers, the key points of which are: containing the second treatment agent for polyester synthetic fibers described in Method 11 and the following solvent (S); and the solvent (S): has a boiling point of less than 105°C at atmospheric pressure.

[0018] Embodiment 13 is a diluted solution of a polyester synthetic fiber treatment agent, which mainly comprises the polyester synthetic fiber treatment agent according to any one of Embodiments 1 to 7, wherein the concentration of the polyester synthetic fiber treatment agent is 0.1 mass % or more and 10 mass % or less.

[0019] Method 14 is a method for treating polyester synthetic fibers, the focus of which is to provide the polyester synthetic fibers with a diluted solution of a polyester synthetic fiber treating agent; the diluted solution of the polyester synthetic fiber treating agent is obtained by adding the polyester synthetic fiber treating agent described in any one of Methods 1 to 7 to water.

[0020] Method 15 is a method for treating polyester synthetic fibers, the focus of which is to provide the polyester synthetic fibers with a diluted solution of a polyester synthetic fiber treating agent; the diluted solution of the polyester synthetic fiber treating agent is obtained by adding the composition containing the polyester synthetic fiber treating agent described in Method 8 to water.

[0021] Method 16 is a method for treating polyester synthetic fibers, the focus of which is to impart a diluted solution of a polyester synthetic fiber treating agent to the polyester synthetic fibers; the diluted solution of the polyester synthetic fiber treating agent is obtained by adding the first treating agent for polyester synthetic fibers described in method 9 or the composition containing the first treating agent for polyester synthetic fibers described in method 10, the second treating agent for polyester synthetic fibers described in method 11 or the composition containing the second treating agent for polyester synthetic fibers described in method 12 to water.

[0022] Aspect 17 is a polyester-based synthetic fiber, wherein the polyester-based synthetic fiber treatment agent according to any one of aspects 1 to 7 is attached thereto. Effects of the Invention

[0023] According to the present invention, the emulsion stability of the synthetic fiber treatment agent when it is diluted with water can be improved. In addition, the adhesiveness 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. DETAILED DESCRIPTION

[0024] <First embodiment> The following is a description of a first embodiment of a treatment agent for polyester synthetic fibers of the present invention (hereinafter referred to as treatment agent). The treatment agent of this embodiment contains a (poly)oxyalkylene derivative (A), an organic acid compound (B) described below, and an organic phosphate compound (C) described below, wherein a 5% by mass aqueous dilution of the treatment agent has a pH of 5.5 or more and 8.5 or less at 25°C.

[0025] ((Poly)oxyalkylene derivative (A)) The (poly)oxyalkylene derivative (A) used in the treatment agent of the present embodiment serves as a surfactant to improve the stability of the treatment agent, thereby improving various functions of the treatment agent.

[0026] Examples of the (poly)oxyalkylene derivatives (A) include compounds 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, compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to aliphatic amines as amine compounds, compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to fatty acid amines, and block copolymers having polyoxyethylene chains and polyoxypropylene chains.

[0027] Among these, polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene alkenyl esters, polyoxyalkylene alkyl phenyl ethers, polyoxyalkylene polyol fatty acid esters, polyoxyalkylene alkylamines, and polyoxyalkylene alkenylamines are preferred. In addition, from the viewpoint of being able to further improve the emulsification stability when the treatment agent is made into a water dilution, polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines are more preferred.

[0028] Specific examples of alcohols used as a raw material for the (poly)oxyalkylene derivative (A) include, for example, (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) isopropanol, isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isotridecanol, isotetradecanol, and isobutyl alcohol. (i) branched alkanols such as isodecyl alcohol, isopentadecyl alcohol, isohexadecanol, isohexadecanol, isoheptadecanol, isooctadecanol, isononadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexadecanol, isohexadecanol, isohexadecanol, isoctacosanol, isononacosanol and isotriacontanol; (2) straight-chain alkanols such as tetradecanol, hexadecanol, heptadecanol, octadecanol and nonadecanol; (3) branched alkanols such as isohexadecanol and isohexadecanol; (4) branched alkanols such as isohexadecanol and isooctadecanol; (5) cyclic alkanols such as cyclopentanol and cyclohexanol; (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol and tristyrenated phenol.

[0029] Specific examples of carboxylic acids used as raw materials for the (poly)oxyalkylene derivatives (A) include, for example, (1) straight-chain 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) branched-chain alkyl carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) straight-chain alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, and octadecatrienoic acid; (4) aromatic carboxylic acids such as benzoic acid; (5) hydroxycarboxylic acids such as ricinoleic acid; and (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.

[0030] The alkylene oxide used as the raw material for forming the (poly) oxyalkylene structure in the (poly) oxyalkylene 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 number of moles of alkylene oxide added 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 number of moles of alkylene oxide added represents the number of moles of alkylene oxide relative to 1 mole of the addition target compound in the loading raw material. Alkylene oxide can use one type of alkylene oxide alone, or two or more types of alkylene oxides can be used in appropriate combination. When two or more types of alkylene oxides are applied, these addition methods can be any one of block addition, random addition, and a combination of block addition and random addition, and there is no special restriction.

[0031] Specific examples of the polyhydric alcohol used as a 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, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, and the like.

[0032] Specific examples of the aliphatic amine used as a raw material of the (poly)oxyalkylene derivative (A) include methylamine, ethylamine, butylamine, octylamine, decylamine, laurylamine, octadecylamine, octadecylamine, coconut amine and the like.

[0033] Specific examples of the fatty acid amide used as a raw material of the (poly)oxyalkylene derivative (A) include caprylic acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, ceramide, and wood wax amide.

[0034] The block copolymer with 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 a surface active effect. The number of polyoxyethylene chains and polyoxypropylene chains in the molecule is not particularly limited, for example, it can be a block copolymer consisting of 1 polyoxypropylene chain and 1 polyoxyethylene chain, or it can be a poloxamer surfactant consisting of 2 polyoxyethylene chains sandwiching the polyoxypropylene chain. In addition, it can also be an ether compound formed by adding a polyoxyethylene chain and a polyoxypropylene chain to a polyol. The addition mole number of the 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 addition mole number of the propylene oxide forming the polyoxypropylene chain is not particularly limited, for example, it can be more than 5 moles and less than 100 moles.

[0035] 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) (polyoxypropylene) C14-C15 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxypropylene) C15-C16 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxypropylene) C16-C17 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxypropylene) C16-C18 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxypropylene) C16-C19 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxypropylene) C17-C18 alkyl ether, polyoxyethylene (polyoxyethylene) (polyoxyethylene) (polyoxypropylene) tridecyl ether, polyoxyethylene tridecyl ether, (polyoxyethylene) (polyoxypropylene) C11-C14 alkyl ether, polyoxyethylene C11-C14 alkyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene tetracosyl ether, polyoxyethylene stearyl 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.

[0036] As these (poly)oxyalkylene derivatives (A), one kind of (poly)oxyalkylene derivative may be used alone, or two or more kinds of (poly)oxyalkylene derivatives may be used in combination as appropriate.

[0037] In the treatment agent, the lower limit of the content of the (poly)oxyalkylene derivative (A) is preferably 5% by mass or more, more preferably 10% by mass or more. When the content of the (poly)oxyalkylene derivative (A) is 5% by mass or more, the emulsion stability of the treatment agent when it is diluted with 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, 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 fiber surface to which the treatment agent is applied can be reduced. Among them, it can also be a range of any combination of the above upper and lower limits.

[0038] (Organic acid compound (B)) Examples of the organic acid compound (B) used in the treatment agent of the present embodiment include organic acids, organic acid salts, and organic acid anhydrides. The organic acid compound (B) can particularly suppress a decrease in the strength of the fiber to which the treatment agent is applied.

[0039] Examples of the organic acid include compounds having a carboxyl group, and alkylphosphoric acid, alkylsulfonic acid, and alkylsulfuric acid 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 other than the carbon atoms derived from the carboxyl group is not particularly limited. Examples of the compound having a carboxyl group include monobasic fatty acids, hydroxy fatty acids, polybasic acids, amino acids, aminocarboxylic acids, and the like.

[0040] The fatty acid may be a known one as appropriate, and may be a saturated fatty acid or an unsaturated fatty acid. Furthermore, it may be a linear compound or a compound having a branched structure.

[0041] Specific examples of saturated fatty acids include formic acid, acetic acid, propionic acid, butyric acid, oxalic acid, caproic acid (caprylic acid), caprylic acid (2-ethylhexanoic acid), caprylic acid (capric 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), behenic acid (behenic acid), tetracosanoic acid, etc.

[0042] Specific examples of unsaturated fatty acids include crotonic acid, myristic acid, palmitoleic acid, oleic acid, tallow acid, eicosenoic acid, linoleic acid, α-linoleic acid, γ-linoleic acid, and arachidic acid.

[0043] Specific examples of polycarboxylic acids include (1) dibasic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, fumaric acid, maleic 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 trimeric acid; and (5) aromatic tetracarboxylic acids such as pyromellitic acid.

[0044] Specific examples of hydroxy fatty acids include citric acid, lactic acid, malic acid, tartaric acid, gluconic acid, glycolic acid, and ricinoleic acid. 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 glutamic acid.

[0045] Specific examples of aminocarboxylic acids include ethylenediaminetetraacetic acid (edetic acid), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraaminehexaacetic acid, nitrilotriacetic acid (Nitrilotriacetic acid), hydroxyethyliminodiacetic acid, L-aspartic acid-N,N-diacetic acid, and ethylenediaminedisuccinic acid.

[0046] 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, and secondary alkyl sulfonic acid (C13-15).

[0047] Specific examples of the alkyl sulfate include lauryl sulfate, oleyl sulfate, and stearyl sulfate. Specific examples of the alkylphosphoric acid include lauryl phosphate and octyl phosphate.

[0048] When a salt of an organic acid is used, the salt may be in the form of, for example, an amine salt or a metal salt. Examples of metal salts include alkali metal salts and alkaline earth metal salts. Specific examples of alkali metals constituting alkali metal salts include sodium, potassium, lithium, etc. Alkaline earth metals constituting alkaline earth metal salts include metals of Group 2 elements, such as calcium, magnesium, beryllium, strontium, barium, etc.

[0049] The amine constituting the amine salt may be any of a primary amine, a secondary amine, and a tertiary amine. Specific examples of the amine constituting the amine salt include, for example, (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, NN-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, and dimethyllaurylamine; (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, and lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; (5) polyoxyalkylene alkylaminoethers such as polyoxyethylene laurylaminoether and polyoxyethylene stearylaminoether; (6) ammonia, etc.

[0050] Specific examples of the organic acid anhydride include fumaric anhydride, maleic anhydride, acetic anhydride, propionic anhydride, succinic anhydride, phthalic anhydride, oxalic anhydride, and benzoic anhydride.

[0051] As these organic acid compounds (B), one kind of organic acid compound may be used alone, or two or more kinds of organic acid compounds may be used in appropriate combination. Among these, from the viewpoint of improving the emulsion stability when the treatment agent is made into a water-diluted liquid, preferred are mono- to pentacarboxylic acids having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups, salts of mono- to pentacarboxylic acids having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups, and di- to pentacarboxylic acid anhydrides having a carbon number of 0 to 9 excluding carbon atoms derived from carboxyl groups.

[0052] In the treatment agent, the lower limit of the content ratio of the organic acid compound (B) is preferably 1% by mass or more, and more preferably 3% by mass or more. When the content ratio of the organic acid compound (B) is 1% by mass or more, the pH of the treatment agent can be adjusted to within an appropriate range, and the reduction in fiber strength given to the treatment agent can be suppressed. In addition, the upper limit of the content ratio of the organic acid compound (B) is preferably 25% by mass or less, and more preferably 20% by mass or less. When the content ratio of the organic acid compound (B) is 25% by mass or less, the pH of the treatment agent can be adjusted to within an appropriate range, and the emulsion stability when the treatment agent is made into a water diluent can be improved. Wherein, it can also be the range of any combination of the above upper and lower limits.

[0053] (Organophosphate compound (C)) The organic phosphate compound (C) used in the treatment agent of the present embodiment includes organic phosphates having a hydrocarbon group having 16 to 20 carbon atoms in the molecule and salts thereof. The organic phosphate compound (C) can reduce the adhesiveness of the fiber surface to which the treatment agent is applied.

[0054] The hydrocarbon group may be a saturated hydrocarbon group or an unsaturated hydrocarbon group. In addition, it may be a straight-chain hydrocarbon group or a branched hydrocarbon group. The unsaturated hydrocarbon group may be an alkenyl group having one unsaturated carbon bond and a double bond, or a hydrocarbon dienyl group or a hydrocarbon trienyl group having two or more double bonds. In addition, it may be an alkynyl group having one unsaturated carbon bond and a triple bond, or a hydrocarbon dialkynyl group having two or more triple bonds.

[0055] Specific examples of the saturated hydrocarbon group include hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, isohexadecyl, isoheptadecyl, isooctadecyl, isonadecyl, and isoeicosyl.

[0056] Specific examples of the unsaturated hydrocarbon group having one double bond in the hydrocarbon group include hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, isohexadecenyl, isoheptadecenyl, isooctadecenyl, isononadecenyl, and isoeicosenyl.

[0057] 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).

[0058] Specific examples of the organic phosphoric acid ester compound (C) include cetyl phosphate, cetyl phosphate salts, stearyl phosphate, stearyl phosphate salts, arachidyl phosphate, and arachidyl phosphate salts.

[0059] The acid value of the organic phosphoric acid ester compound (C) is not particularly limited. As these organic phosphate compounds (C), one type of organic phosphate compound may be used alone, or two or more types of organic phosphate compounds may be used in appropriate combination.

[0060] 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 fiber surface to which the treatment agent is applied 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 diluted with water can be improved. Among them, it can also be a range of any combination of the above upper and lower limits.

[0061] 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 preferred that 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 content of the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less. By being defined within this range, the effect of the present invention can be further improved. Among them, it can also be the range of any combination of the above upper and lower limits.

[0062] (pH of treatment agent) The lower limit of the pH of a 5 mass % water dilution of the treatment agent at 25°C is 5.5 or more. When the pH is 5.5 or more, the emulsification stability when the treatment agent is made into a water dilution can be improved. The upper limit of the pH of a 5 mass % water dilution of the treatment agent at 25°C is 8.5 or less. When the pH is 8.5 or less, the reduction in the strength of the fiber to which the treatment agent is applied can be suppressed. Among them, the range of any combination of the above upper and lower limits can also be used.

[0063] (Save method) The treatment agent may be constituted as a single-dose form containing the above-mentioned components (A) to (C), or may be constituted as a two-dose form as shown below from the viewpoint of improving the stability of the preparation.

[0064] The two-part treatment agent is composed of a first treatment agent for polyester synthetic fibers containing a (poly)oxyalkylene derivative (A) (hereinafter referred to as "the first treatment agent") and a second treatment agent for polyester synthetic fibers containing an organic phosphate compound (C) (hereinafter referred to as "the second treatment agent") in a combined form. Either or both of the first treatment agent and the second treatment agent contain an organic acid compound (B).

[0065] The two-component treatment agent is prepared by mixing the first treatment agent and the second treatment agent as separate agents before use, for example, during storage or distribution. The two-component treatment agent is prepared by mixing the first treatment agent and the second treatment agent to prepare a mixture when used.

[0066] (Solvent) The treatment agent of the present embodiment may be mixed with a solvent as appropriate to prepare a composition containing the treatment agent for polyester synthetic fibers (hereinafter referred to as a "treatment agent-containing composition"), and the treatment agent-containing composition may be stored or distributed.

[0067] 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 polar solvents such as hexane. These solvents can 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.

[0068] In the composition containing the treatment agent, when the total content ratio of the treatment agent and the solvent is 100 parts by mass, the treatment agent is preferably contained in an amount of 10 parts by mass or more. The effects of the treatment agent according to the first embodiment will be described.

[0069] (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.

[0070] Therefore, the emulsion stability when the treatment agent is made into a water-diluted liquid can be improved. In this way, the generation of precipitates and / or precipitations from the emulsion can be reduced, and the uneven quality of the fiber caused by the uneven adhesion of the treatment agent can be reduced. In addition, the adhesion of the fiber surface to which the treatment agent is applied can be reduced, and the reduction in fiber strength can be suppressed. In this way, the uneven quality of the processed product caused by the poor process can be reduced.

[0071] (1-2) The treatment agent of the first embodiment may also be configured to include, in combination, 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.

[0072] <Second embodiment> Next, a second embodiment that embodies the first treatment agent of the present invention will be described, with the description focusing on differences from the above-described embodiment.

[0073] 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 synthetic fibers (hereinafter referred to as "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 a 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 set as a 5% by mass water dilution of the treatment agent, the pH at 25°C is within the range of 5.5 or more and 8.5 or less.

[0074] When the mixture of the first treatment agent and the second treatment agent is a composition containing the second treatment agent (wherein water is used as the solvent (S)), the pH is measured by the following method. When the mixture of the first treatment agent and the second treatment agent is a 5 mass % or more aqueous dilution of the treatment agent, the mixture is diluted to a 5 mass % aqueous dilution of the treatment agent and then the pH at 25°C is measured.

[0075] When the mixture of the first treatment agent and the second treatment agent is a water dilution of less than 5% by mass of the treatment agent, the mixture is first dried or concentrated to a 5% by mass water dilution of the treatment agent and then the pH at 25°C is measured.

[0076] 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) contains 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 % water of the treatment agent, 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.

[0077] The (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The first treatment agent of the present embodiment may be mixed with a solvent as appropriate to prepare a composition containing the first treatment agent for polyester synthetic fibers (hereinafter referred to as "composition containing the first treatment agent"), and stored or distributed as the composition containing the first treatment agent.

[0078] The solvent may be the one 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.

[0079] The effects of the first treatment agent of the second embodiment will be described. The second embodiment has the following effects in addition to the effects of the above-mentioned embodiment. (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) when used. 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 composition of the resulting treatment agent can be adjusted. In addition, the first treatment agent and the second treatment agent can be circulated separately as independent agents.

[0080] <Third embodiment> Next, a third embodiment that embodies the second treatment agent of the present invention will be described, with the description focusing on differences from the above-described embodiment.

[0081] The second treatment agent of this embodiment contains an organic phosphate compound (C). The second treatment agent is used in combination 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% by mass water dilution of the treatment agent, the pH at 25°C is within the range of greater than 5.5 and less than 8.5. Among them, 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 determined by the same method as the method described in the second embodiment.

[0082] The (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The second treatment agent of the present embodiment may be mixed with a solvent as appropriate to prepare a composition containing the second treatment agent, and the composition may be stored or distributed as the composition containing the second treatment agent.

[0083] The solvent may be the one 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.

[0084] The effects of the second treatment agent of the third embodiment will be 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 the first treatment agent containing a (poly)oxyalkylene derivative (A) when used. 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 resulting treatment agent can be adjusted. In addition, the second treatment agent and the first treatment agent can be circulated separately as independent agents.

[0085] <Fourth embodiment> Next, a fourth embodiment of the method for treating polyester synthetic fibers (hereinafter referred to as “fiber treating method”) of the present invention will be described.

[0086] When the treatment agent is in the form of one dosage form, the fiber treatment method of this embodiment is characterized in that a diluent containing a solvent and the treatment agent of the first embodiment is applied to the polyester synthetic fiber. The preparation method of the diluent 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 diluent is preferably prepared by adding the treatment agent of the first embodiment or a composition containing the treatment agent to water.

[0087] When the treatment agent is a two-dose type, the fiber treatment method of this embodiment is characterized in that: a diluent of a treatment agent containing a solvent, a first treatment agent of the second embodiment, and a second treatment agent of the third embodiment is applied to the polyester synthetic fiber. The preparation method of the diluent 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 a solvent. The diluent 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 between the first treatment agent and the second treatment agent is preferably the mass ratio of the non-volatile component, the first treatment agent / the second treatment agent = 95 / 5 to 5 / 95. By defining it within this range, the operability can be improved. Among them, in this specification, the non-volatile component refers to the residue after the object is heat-treated at 105°C for 2 hours to fully remove the volatile substances, that is, the absolutely dry substance.

[0088] The solvent used for preparing the dilution liquid may be exemplified by those exemplified in the first embodiment. From the viewpoint of workability, etc., the concentration of the treatment agent in the dilution liquid is preferably 0.1 mass % or more and 10 mass % or less.

[0089] In the method of using the first treatment agent and the second treatment agent together, the mixing ratio of each agent can be arbitrarily changed. Therefore, even under different manufacturing conditions such as different manufacturing equipment or different climates such as temperature and humidity, it is easy to prepare a treatment agent or diluent that has the best fiber properties or fiber manufacturing properties at any time by slightly adjusting the mixing ratio.

[0090] 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 stirrer such as a homomixer, a homogenizer, a rubber mill, a wire mixer, or the like.

[0091] The fiber treatment method is a method in which the diluent obtained in the above manner is applied to the fiber in at least one of the spinning step, the stretching step, and the finishing step of the polyester synthetic fiber.

[0092] The fiber to which the diluent is applied may be a polyester synthetic fiber, and specific examples of the polyester synthetic fiber include polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins.

[0093] The use of the fiber is not particularly limited, and examples thereof include spinning, spinning 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, and is, for example, 100 mm or less. Among these, the diluent of the present invention is preferably suitable for polyester short fibers and polyester synthetic fibers for spinning manufacturing.

[0094] There is no particular restriction on the proportion of the diluent attached to the fiber. It is preferred that the diluent is attached to the fiber so that the final solid content ratio is 0.01% by mass or more and 10% by mass or less, and more preferably 0.1% by mass or more and 3% by mass or less. According to this structure, the efficacy 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, method, 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 or more and 5 minutes or less.

[0095] The fiber to which the diluent has been applied may be dried or heat-treated by a known method. The solvent such as water is volatilized by drying or heating to obtain fibers to which the treatment agent or the components contained in the first treatment agent and the second treatment agent are attached.

[0096] The effects of the fiber processing method according to the fourth embodiment will be 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 finishing step. In particular, by adding the treatment agent of the first embodiment or a composition containing the treatment agent to water for modulation, a diluent having excellent emulsification stability can be obtained. Alternatively, 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 for modulation, a diluent having excellent emulsification stability can be obtained. Therefore, the effectiveness of each component for spinning, spinning manufacturing, short fibers, long fibers, nonwoven fabrics, filling cotton, etc. can be effectively exerted.

[0097] The above-mentioned embodiment can also be implemented with modifications as follows: The above-mentioned embodiment and the following modifications can be implemented in combination with each other within the scope of no technical contradiction. The method for preparing the diluted solution of the treatment agent in the above-mentioned embodiment is not particularly limited, and a method other than the preparation method described in the fourth embodiment may be adopted.

[0098] ·Within the scope that does not impair the effect of the present invention, each treatment agent, each composition, or diluent of the above-mentioned embodiment may also be further mixed with other components for maintaining the quality of each treatment agent, each composition, or diluent, such as other solvents, stabilizers, antistatic agents, linkers, 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 efficacy 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 be stored in the form of independent agents. Example

[0099] In order to more specifically explain the constitution and effects 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, unless otherwise specified, part represents part by mass, and % represents mass %.

[0100] Test Category 1 (Preparation of 1-dosage treatment agent) (Example 1-1) As shown in Table 1, a treatment agent of Example 1-1 was prepared, which contained 25 parts (%) of polyoxyethylene (10 (representing the number of added moles of alkylene oxide. The same shall apply hereinafter)) decylamine (A-1) shown in Table 2 as a (poly)oxyalkylene derivative (A), 10 parts (%) of polyoxyethylene (5) decyl ether (A-10), 7 parts (%) of (polyoxyethylene) (polyoxypropylene) (r+s=10, r is the number of added moles of ethylene oxide, s is the number of added moles of propylene oxide (the same shall apply hereinafter)) tridecyl ether (A-21), 8 parts (%) of oxalic acid / oxalic acid potassium salt = 50 / 50 (mass ratio) (B-1) as an organic acid compound (B), 50 parts (%) of cetyl phosphate and its potassium salt (C-3) as an organic phosphate compound (C), and 3 parts (relative to 100 parts in total of components (A) to (C)) of polydimethylsiloxane (D-1) as other component (D).

[0101] (Example 1-2 to Example 1-28, Comparative Example 1-1 to Comparative Example 1-10) The treatment agents of Examples 1-2 to 1-28 and Comparative Examples 1-1 to 1-10 were prepared in the same manner as the treatment agent of Example 1-1, and contained (poly)oxyalkylene derivatives (A), organic acid compounds (B), organic phosphate compounds (C), and other components (D) in the proportions shown in Table 1.

[0102] 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) represents 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.

[0103] (pH of treatment agent) The treatment agent of each example was diluted with warm water at about 70° C. to prepare a 5% water dilution of the treatment agent. The pH of the prepared 5% water dilution was measured at 25° C. The measured values ​​are shown in the “pH of 5% water dilution” column of Table 1.

[0104] [Table 1]

[0105] The details of the (poly)oxyalkylene derivative (A), the organic acid compound (B), the organic phosphate compound (C), and other components (D) described in Table 1 are as follows. ((Poly)oxyalkylene derivative (A)) A-1 to A-39 described in the following Table 2 were used.

[0106] [Table 2]

[0107] (Organic acid compound (B)) B-1 to B-21 described in the following Table 3 were used.

[0108] [Table 3]

[0109] (Organophosphate compound (C)) C-1 to C-14 listed in Table 4 below were used. The organic phosphate compounds (C) listed in Table 4 below are compounds in which various organic phosphates have been partially neutralized with KOH, i.e., mixtures of organic phosphates and potassium salts of organic phosphates. The same applies to the organic phosphate compounds D-5 and D-6 described below.

[0110] [Table 4]

[0111] The method for measuring the acid value of the organic phosphoric acid ester 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 by potentiometric measurement 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.

[0112] [Number 1]

[0113] In number 1, f represents the factor of 0.1 mol / L potassium hydroxide methanol standard solution, S represents the amount (g) of the organic phosphate compound (C), R represents the amount (mL) of a 0.1 mol / L potassium hydroxide methanol standard solution used up to the inflection point.

[0114] (Other ingredients (D)) D-1: Polydimethylsiloxane D-2: Amino modified polydimethylsiloxane D-3: Stearyl Alcohol D-4: Polyvinyl alcohol (degree of polymerization 300, degree of saponification 80) D-5: Hexyl phosphate and its potassium salt D-6: Dodecyl phosphate and its potassium salt D-7: Di-tetradecyl sulfosuccinate sodium salt D-8: Tetraglycerol 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 allowed to stand at 50°C for 24 hours, and the appearance of the dilution after standing was visually confirmed and evaluated according to the following criteria. The results are shown in the "emulsification stability" column of Table 1.

[0115] Evaluation criteria for emulsion stability ◎ (Good): No precipitate or sedimentation in the lower layer was observed ○ (Pass): Precipitate is visible or sediment is seen in the lower layer, which disappears when stirred manually with a stirring rod × (bad): Precipitate is visible or sediment is seen in the lower layer, and it does not disappear even 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 petri dish (inner diameter 9.5 cm). At this time, the treatment agent spread evenly in the glass petri 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.

[0116] ·Evaluation criteria for adhesion ◎ (Good): The appearance after temperature adjustment is solid and does not feel sticky when touched. ○ (Pass): The appearance after temperature adjustment is solid and feels sticky when touched. × (bad): The appearance after temperature adjustment is liquid or gel-like, and it 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 attached to the polyester fiber (1.3de×38mm) that had not yet been given the treatment agent by spraying, 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 after being placed in an atmosphere of 50°C and 80% RH for 3 months was measured using a tensile tester. 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.

[0117] Fiber strength evaluation criteria ◎ (Good): Strength after 3 months is 95% or more of initial strength ○ (Pass): The strength after 3 months is 90% or more and less than 95% of the initial strength × (bad): 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) (1st treatment agent (IA-1)) As shown in Table 5, the first treatment agent (IA-1) was prepared, which contained 50 parts (%) of polyoxyethylene (10) decylamine (A-1) shown in Table 2 as a (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 = 50 / 50 (mass ratio) (B-1) as an organic acid compound (B).

[0118] (1st treatment agent (IA-2) to (IA-27), 1st treatment agent (IB-1) to (IB-27), 1st treatment agent (IC-1)) In the same manner as in the first treatment agent (IA-1), a (poly)oxyalkylene derivative (A) and an organic acid compound (B) containing the ratio shown in Table 5 were prepared.

[0119] 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.

[0120] [Table 5]

[0121] 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, a second treatment agent (II-A-1) was prepared containing 100 parts (%) of cetyl phosphate and its potassium salt (C-1) as the organic phosphate compound (C).

[0122] (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 in 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.

[0123] 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.

[0124] [Table 6]

[0125] Test Category 7 (Evaluation of Stability of Preparations) · Evaluation of the formulation stability of the first treatment agent Each first treatment agent described in Test Type 5 was stored at 25° C. for 3 days. The formulation stability was evaluated based on the following criteria. The results are shown in the “Formulation Stability” column of Table 5.

[0126] · Evaluation of formulation stability of the second treatment agent A composition containing each second treatment agent described 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 based on the following criteria. The results are shown in the "Formulation Stability" column of Table 6.

[0127] · Evaluation criteria for formulation stability (composition containing the first treatment agent and the second treatment agent) ○ (good): no gelation or solidification × (Unqualified): Gelated or solidified Test category 8 (treatment agent prepared by the first treatment agent and the 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 (IA-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) as other treatment agent (D) shown in Table 8 (relative to 100 parts in total of the first treatment agent and the second treatment agent).

[0128] (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 agent of each example was prepared in the same manner as in Example 2-A-1, except that the first treatment agent and the second treatment agent shown in Table 7 were mixed, and other treatment agents (D) shown in Table 8 were mixed as needed.

[0129] 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) represents the blending amount (parts) when the total blending amount of the first treatment agent and the second treatment agent is 100 parts.

[0130] (pH determination) 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 where another treatment agent (D) was used, the first treatment agent, the second treatment agent, and the other treatment agent (D) were mixed and then 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.

[0131] [Table 7]

[0132] The other treatment agents (D) described in Table 7 were treatment agents (III-1) to (III-4) described in Table 8. Treatment agents (III-1) to (III-4) were prepared so as to contain the other treatment agents (D) at the ratios shown in Table 8.

[0133] [Table 8]

[0134] Test Category 9 (Evaluation of 2 Formulations of Treatment Agents) Using the treatment agents obtained in each example, the emulsion stability, adhesion, and fiber strength were evaluated in the same manner as in Example 1. The preparation method of the diluent used for the evaluation of emulsion stability and fiber strength was the same as the method described in the (pH measurement) column of Test Category 8. The first treatment agent, the second treatment agent, and other treatment agents (D) as required 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.

[0135] 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 emulsion stability when made into a water-diluted solution. In addition, it can reduce the adhesiveness of the fiber surface to which the treatment agent is applied and can suppress the reduction of fiber strength.

[0136] The present disclosure also includes the following aspects. (Appendix 1) A treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), the following organic acid compound (B), and the following organic phosphate compound (C); It is characterized in that The pH of a 5 mass % aqueous dilution of the polyester synthetic fiber treating agent at 25° C. is 5.5 or more and 8.5 or less;

[0137] Organic acid compound (B): at least one selected from an organic acid, an organic acid salt, and an organic acid anhydride; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof.

[0138] (Appendix 2) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The organic acid compound (B) is at least one selected from mono- to pentacarboxylic acids having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups, salts of mono- to pentacarboxylic acids having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups, and di- to pentacarboxylic acid anhydrides having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups.

[0139] (Appendix 3) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The (poly)oxyalkylene derivative (A) includes at least one selected from the group consisting of polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines.

[0140] (Appendix 4) The polyester synthetic fiber treating agent as described in Appendix 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 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 content of the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less.

[0141] (Appendix 5) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The invention is constituted to include in combination: 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 first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based synthetic fibers contain the organic acid compound (B).

[0142] (Appendix 6) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The polyester-based synthetic fibers are polyester staple fibers.

[0143] (Appendix 7) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The polyester synthetic fibers are produced by spinning.

[0144] (Appendix 8) A composition containing a treating agent for polyester synthetic fibers, characterized in that: A polyester synthetic fiber treatment agent as described in any one of Appendices 1 to 7 and the following solvent (S);

[0145] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 9) A first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a second treatment agent for polyester synthetic fibers or a composition comprising the second treatment agent for polyester synthetic fibers; The second treating agent for polyester synthetic fibers contains the following organic phosphate compound (C); The above-mentioned 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); It is characterized in that Either or both of the first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based 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 prepared as a 5 mass % water dilution, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0146] Organic acid compound (B): at least one selected from an organic acid, an organic acid salt, and an organic acid anhydride; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0147] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 10) A composition containing a first treating agent for polyester synthetic fibers, characterized in that: Containing the first treating agent for polyester synthetic fibers as described in Appendix 9 and the following solvent (S);

[0148] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 11) A second treatment agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a first treatment agent for polyester synthetic fibers or a composition comprising the first treatment agent for polyester synthetic fibers; The first treating agent for polyester 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); It is characterized in that Either or both of the first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based 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 prepared as a 5 mass % water dilution, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0149] Organic acid compound (B): at least one selected from an organic acid, an organic acid salt, and an organic acid anhydride; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0150] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 12) A composition containing a second treating agent for polyester synthetic fibers, characterized in that: Containing the second treatment agent for polyester synthetic fibers as described in Appendix 11 and the following solvent (S);

[0151] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 13) A diluent of a polyester synthetic fiber treating agent, characterized in that: The method comprises the polyester synthetic fiber processing agent according to any one of Appendices 1 to 7, wherein the concentration of the polyester synthetic fiber processing agent is 0.1% by mass or more and 10% by mass or less.

[0152] (Appendix 14) A method for processing polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers; The diluted solution of the polyester-based synthetic fiber treating agent is obtained by adding the polyester-based synthetic fiber treating agent described in any one of Appendixes 1 to 7 to water.

[0153] (Appendix 15) A method for processing polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers; The diluted solution of the polyester-based synthetic fiber treating agent is obtained by adding the composition containing the polyester-based synthetic fiber treating agent described in Appendix 8 to water.

[0154] (Appendix 16) A method for processing polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers; The diluted solution of the above-mentioned polyester synthetic fiber treatment agent 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.

[0155] (Appendix 17) A polyester synthetic fiber, characterized in that: The polyester synthetic fiber treating agent described in any one of Appendixes 1 to 7 is attached.

Claims

1. A polyester synthetic fiber treatment agent comprising 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), characterized in that: The pH of a 5 mass % aqueous dilution of the polyester-based synthetic fiber treating agent at 25° C. is 5.5 or more and 8.5 or less, and the polyester-based synthetic fiber treating agent does not contain a solvent. Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof.

2. The polyester synthetic fiber treating agent according to claim 1, wherein The organic acid compound (B) is at least one selected from mono- to pentacarboxylic acids having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups, salts of mono- to pentacarboxylic acids having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups, and di- to pentacarboxylic acid anhydrides having 0 to 9 carbon atoms excluding carbon atoms derived from carboxyl groups.

3. The polyester synthetic fiber treating agent according to claim 1, wherein The (poly)oxyalkylene derivative (A) includes at least one selected from the group consisting of polyoxyalkylene alkylamines and polyoxyalkylene alkenylamines.

4. The polyester synthetic fiber treating agent according to 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 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 content of the organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less.

5. The polyester synthetic fiber treating agent according to claim 1, wherein The method comprises a first treating agent for polyester synthetic fibers containing the (poly)oxyalkylene derivative (A) and a second treating agent for polyester synthetic fibers containing the organic phosphate compound (C) in combination. Either or both of the first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based synthetic fibers contain the organic acid compound (B).

6. The polyester synthetic fiber treating agent according to claim 1, wherein The polyester-based synthetic fibers are polyester staple fibers.

7. The polyester synthetic fiber treating agent according to claim 1, wherein The polyester synthetic fibers are produced by spinning.

8. A composition containing a treating agent for polyester synthetic fibers, characterized in that: The method comprises the polyester synthetic fiber treating agent according to 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 at atmospheric pressure.

9. A first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a second treatment agent for polyester synthetic fibers or a composition comprising the second treatment agent for polyester synthetic fibers, The second treating agent for polyester 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), It is characterized in that Either or both of the first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based 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 a 5 mass % water-diluted solution, the pH at 25° C. is 5.5 or more and 8.5 or less, and the mixture does not contain a solvent. The mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers 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), and the mixture does not contain a solvent. Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof, Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

10. A composition containing a first treating agent for polyester synthetic fibers, characterized in that: Containing the first treating agent for polyester synthetic fibers according to claim 9 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

11. A second treating agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a first treating agent for polyester synthetic fibers or a composition comprising the first treating agent for polyester synthetic fibers, The first treating agent for polyester 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), It is characterized in that Either or both of the first treating agent for polyester-based synthetic fibers and the second treating agent for polyester-based 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 a 5 mass % water-diluted solution, the pH at 25° C. is 5.5 or more and 8.5 or less, and the mixture does not contain a solvent. The mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers 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), and the mixture does not contain a solvent. Organic acid compound (B): at least one selected from organic acids, organic acid salts, and organic acid anhydrides, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having a hydrocarbon group having 16 to 20 carbon atoms in the molecule, and salts thereof, Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

12. A composition containing a second treatment agent for polyester synthetic fibers, characterized in that: Containing the second treating agent for polyester synthetic fibers according to claim 11 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

13. A diluent of a polyester synthetic fiber treatment agent, characterized in that: The method comprises the polyester synthetic fiber processing agent according to any one of claims 1 to 7, wherein the concentration of the polyester synthetic fiber processing agent is 0.1% by mass or more and 10% by mass or less.

14. A method for treating polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers, The diluted solution of the polyester-based synthetic fiber treating agent is obtained by adding the polyester-based synthetic fiber treating agent according to any one of claims 1 to 7 to water.

15. A method for treating polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers, The diluted solution of the polyester-based synthetic fiber treating agent is obtained by adding the composition containing the polyester-based synthetic fiber treating agent according to claim 8 to water.

16. A method for treating polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers, The diluted solution of the above-mentioned polyester synthetic fiber treatment agent is obtained by adding the first treatment agent for polyester synthetic fibers described in claim 9 or the composition containing the first treatment agent for polyester synthetic fibers described in claim 10, the second treatment agent for polyester synthetic fibers described in claim 11 or the composition containing the second treatment agent for polyester synthetic fibers described in claim 12 to water.

17. A polyester synthetic fiber, characterized in that: The polyester synthetic fiber treating agent according to any one of claims 1 to 7 is attached thereto.

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