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, third treatment agent for polyester-based synthetic fibers, composition containing third treatment agent for polyester-based synthetic fibers, diluent of 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 that 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 has been imparted, and can suppress a decrease in fiber strength. This treatment agent for polyester synthetic fibers contains 5% by mass or more of a (poly) oxyalkylene derivative (A), 1% by mass or more of an inorganic acid compound (B), and 5% by mass or more of an organophosphoric acid ester compound (C). A 1% by mass water diluent of the treatment agent for polyester synthetic fibers has a pH of 5.5 to 8.5 at 25 DEG C. The inorganic acid compound (B) is at least one selected from the group consisting of sulfuric acid, nitric acid, hydrochloric acid, and salts thereof. The organophosphoric acid ester compound (C) is at least one selected from the group consisting of organophosphoric acid esters having an alkyl 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 third treatment agent for polyester synthetic fibers, a composition containing the third 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 synthetic fiber treatment agents disclosed in Patent Documents 1 and 2. Patent Document 1 discloses a polyester synthetic fiber treatment agent containing predetermined alkyl phosphates, predetermined surfactants, and monohydric aliphatic alcohols having a predetermined alkyl group in a predetermined ratio. Patent Document 2 discloses a fiber treatment agent for spinning, containing as essential components a component A composed of polyvinyl alcohol or a derivative thereof and a component B composed of a potassium salt of an alkyl phosphate ester or a potassium salt of a polyoxyalkylene alkyl phosphate ester having a predetermined alkyl group, wherein the components A and B are mixed in a predetermined ratio. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent No. 5796923 Patent Document 2: Japanese Patent No. 5651033 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 poor spinning. Furthermore, the strength of the fiber to which the synthetic fiber treatment agent is applied may be reduced, resulting in poor process flow. 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 inorganic acid compound (B), and a predetermined organic phosphate compound (C) and having a predetermined pH value has particularly good effects.

[0007] Each method for solving the above-mentioned problems is described. Mode 1 is a treatment 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 inorganic acid compound (B), and 5% by mass or more of the following organic phosphate compound (C); the key point is that a 1% by mass water dilution of the above-mentioned polyester-based synthetic fiber treatment agent (without solvent) has a pH of 5.5 or more and 8.5 or less at 25°C; the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and their salts; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group with 16 or more and 20 carbon atoms in the molecule, and their salts.

[0008] Embodiment 2 is a processing agent for polyester-based synthetic fibers as described in Embodiment 1, wherein, when the total content of the above-mentioned (poly)oxyalkylene derivative (A), the above-mentioned inorganic acid compound (B), and the above-mentioned organic phosphate compound (C) is set to 100 parts by mass, the total content of the above-mentioned (poly)oxyalkylene derivative (A) and the above-mentioned inorganic acid compound (B) is 20 parts by mass or more and 80 parts by mass or less, and the content of the above-mentioned organic phosphate compound (C) is 20 parts by mass or more and 80 parts by mass or less.

[0009] Mode 3 is a processing agent for polyester synthetic fibers as described in Mode 1 or 2, wherein the processing agent is constituted to include in a group form: a two-dose first processing agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a two-dose second processing agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C); either or both of the above-mentioned two-dose first processing agent for polyester synthetic fibers and the above-mentioned two-dose second processing agent for polyester synthetic fibers contain the above-mentioned inorganic acid compound (B).

[0010] Mode 4 is a treatment agent for polyester synthetic fibers as described in Mode 1 or 2, wherein the treatment agent is composed in a group form of: a three-part first treatment agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), a three-part second treatment agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C), and a three-part third treatment agent for polyester synthetic fibers containing the above-mentioned inorganic acid compound (B).

[0011] Aspect 5 is the processing agent for polyester synthetic fibers according to any one of aspects 1 to 4, wherein the polyester synthetic fibers are polyester staple fibers. 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 for spinning.

[0012] Method 7 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 Methods 1 to 6 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0013] Mode 8 is a two-dose first treatment agent for polyester synthetic fibers, which contains a (poly)oxyalkylene derivative (A) and is used in combination with a two-dose second treatment agent for polyester synthetic fibers or a composition containing the two-dose second treatment agent for polyester synthetic fibers; the two-dose second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); the composition containing the two-dose second treatment agent for polyester synthetic fibers contains the two-dose second treatment agent for polyester synthetic fibers and the following solvent (S); the key point is that: either or both of the two-dose first treatment agent for polyester synthetic fibers and the two-dose second treatment agent for polyester synthetic fibers contain the following inorganic acid compound (B); when the two-dose first treatment agent for polyester synthetic fibers and the two-dose second treatment agent for polyester synthetic fibers are used together, the two-dose first treatment agent for polyester synthetic fibers and the two-dose second treatment agent for polyester synthetic fibers are used together. When the mixture of the two-dose first treatment agent for polyester-based synthetic fibers and the two-dose second treatment agent for polyester-based synthetic fibers (without solvent) is set as a 1% by mass water dilution, the pH at 25°C is 5.5 or more and 8.5 or less; the mixture of the two-dose first treatment agent for polyester-based synthetic fibers and the two-dose 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 inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group with 16 or more and 20 carbon atoms in the molecule, and salts thereof; the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0014] Method 9 is a composition containing a two-dose first treatment agent for polyester synthetic fibers, the key point of which is that it contains the two-dose first treatment agent for polyester synthetic fibers described in Method 8 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0015] Embodiment 10 is a two-dose second treatment agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a two-dose first treatment agent for polyester synthetic fibers or a composition comprising the two-dose first treatment agent for polyester synthetic fibers; the two-dose first treatment agent for polyester synthetic fibers comprises a (poly)oxyalkylene derivative (A); the composition comprising the two-dose first treatment agent for polyester synthetic fibers comprises the two-dose first treatment agent for polyester synthetic fibers and the following solvent (S); the key point is that: either or both of the two-dose first treatment agent for polyester synthetic fibers and the two-dose second treatment agent for polyester synthetic fibers contain the following inorganic acid compound (B); when the two-dose first treatment agent for polyester synthetic fibers and the two-dose second treatment agent for polyester synthetic fibers are used together, the two-dose first treatment agent for polyester synthetic fibers and the two-dose first treatment agent for polyester synthetic fibers are used together. When the mixture of the two-dose first treatment agent for polyester-based synthetic fibers and the two-dose second treatment agent for polyester-based synthetic fibers (without solvent) is set as a 1% by mass water dilution, the pH at 25°C is 5.5 or more and 8.5 or less; the mixture of the two-dose first treatment agent for polyester-based synthetic fibers and the two-dose 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 inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group with 16 or more and 20 carbon atoms in the molecule, and salts thereof; the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0016] Method 11 is a composition containing a two-dose second treatment agent for polyester synthetic fibers, the key point of which is that it contains the two-dose second treatment agent for polyester synthetic fibers described in method 10 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0017] Method 12 is a three-dose first treatment agent for polyester synthetic fibers, which contains a (poly)oxyalkylene derivative (A) and is used in combination with a three-dose second treatment agent for polyester synthetic fibers or a composition containing the three-dose second treatment agent for polyester synthetic fibers, and a three-dose third treatment agent for polyester synthetic fibers or a composition containing the three-dose third treatment agent for polyester synthetic fibers; the three-dose second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); the composition containing the three-dose second treatment agent for polyester synthetic fibers contains the three-dose second treatment agent for polyester synthetic fibers and the following solvent (S); the three-dose third treatment agent for polyester synthetic fibers contains the following inorganic acid compound (B); the composition containing the three-dose third treatment agent for polyester synthetic fibers contains the three-dose second treatment agent for polyester synthetic fibers and the following solvent (S); the key point is: when the three-dose first treatment agent for polyester synthetic fibers, The pH of the mixture of the three-component second treatment agent for polyester synthetic fibers and the three-component third treatment agent for polyester synthetic fibers (without solvent) as a 1% by mass water dilution is 5.5 or more and 8.5 or less at 25° C.; the mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers (without solvent) contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group having 16 or more and 20 carbon atoms in the molecule, and salts thereof; and the boiling point of the solvent (S) at atmospheric pressure is 105° C. or less.

[0018] Method 13 is a composition containing a three-part first treatment agent for polyester synthetic fibers, the key point of which is that it contains the three-part first treatment agent for polyester synthetic fibers described in Method 12 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0019] Mode 14 is a three-dose second treatment agent for polyester synthetic fibers, which contains an organic phosphate compound (C) and is used in combination with a three-dose first treatment agent for polyester synthetic fibers or a composition containing the three-dose first treatment agent for polyester synthetic fibers, and a three-dose third treatment agent for polyester synthetic fibers or a composition containing the three-dose third treatment agent for polyester synthetic fibers; the three-dose first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); the composition containing the three-dose first treatment agent for polyester synthetic fibers contains the three-dose first treatment agent for polyester synthetic fibers and the following solvent (S); the three-dose third treatment agent for polyester synthetic fibers contains an inorganic acid compound (B); the composition containing the three-dose third treatment agent for polyester synthetic fibers contains the three-dose third treatment agent for polyester synthetic fibers and the following solvent (S); the key point is: when the three-dose first treatment agent for polyester synthetic fibers, the above When the mixture of the three-part second treatment agent for polyester synthetic fibers and the three-part third treatment agent for polyester synthetic fibers (without solvent) is set as a 1% by mass water dilution, the pH at 25° C. is 5.5 or more and 8.5 or less; the mixture of the three-part first treatment agent for polyester synthetic fibers, the three-part second treatment agent for polyester synthetic fibers, and the three-part third treatment agent for polyester synthetic fibers (without solvent) contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group having 16 or more and 20 carbon atoms in the molecule, and salts thereof; and the boiling point of the solvent (S) at atmospheric pressure is 105° C. or less.

[0020] Method 15 is a composition containing a three-part second treatment agent for polyester synthetic fibers, the key point of which is that it contains the three-part second treatment agent for polyester synthetic fibers as described in claim 14 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0021] Method 16 is a three-dose third treatment agent for polyester synthetic fibers, which contains an inorganic acid compound (B) and is used in combination with a three-dose first treatment agent for polyester synthetic fibers or a composition containing the three-dose first treatment agent for polyester synthetic fibers, and a three-dose second treatment agent for polyester synthetic fibers or a composition containing the three-dose second treatment agent for polyester synthetic fibers; the three-dose first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); the composition containing the three-dose first treatment agent for polyester synthetic fibers contains the three-dose first treatment agent for polyester synthetic fibers and the following solvent (S); the three-dose second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); the composition containing the three-dose second treatment agent for polyester synthetic fibers contains the three-dose second treatment agent for polyester synthetic fibers and the following solvent (S); the key point is: when the three-dose first treatment agent for polyester synthetic fibers, The pH of the mixture of the three-component second treatment agent for polyester synthetic fibers and the three-component third treatment agent for polyester synthetic fibers (without solvent) as a 1% by mass water dilution is 5.5 or more and 8.5 or less at 25° C.; the mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers (without solvent) contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C); the inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; the organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group having 16 or more and 20 carbon atoms in the molecule, and salts thereof; and the boiling point of the solvent (S) at atmospheric pressure is 105° C. or less.

[0022] Method 17 is a composition containing a three-dose third treatment agent for polyester synthetic fibers, the key point of which is that it contains the three-dose third treatment agent for polyester synthetic fibers described in Method 16 and the following solvent (S); the boiling point of the solvent (S) at atmospheric pressure is below 105°C.

[0023] Embodiment 18 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 6, wherein the concentration of the polyester synthetic fiber treatment agent is 0.1 mass % or more and 10 mass % or less.

[0024] Method 19 is a method for treating polyester synthetic fibers, the focus of which is: in at least one of the spinning step, stretching step, and finishing step of the polyester synthetic fibers, a diluted solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers; 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 6 to water.

[0025] Method 20 is a method for treating polyester synthetic fibers, the focus of which is: in at least one of the spinning step, stretching step, and finishing step of the polyester synthetic fibers, a diluted solution of a polyester synthetic fiber treating agent is applied to the polyester synthetic fibers; 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 7 to water.

[0026] Method 21 is a method for treating polyester synthetic fibers, the focus of which is: in at least one of the spinning step, stretching step, and finishing step of the polyester synthetic fibers, a diluted solution of a polyester synthetic fiber treatment agent is applied to the polyester synthetic fibers; the diluted solution of the polyester synthetic fiber treatment agent is obtained by adding the two-dose first treatment agent for polyester synthetic fibers described in method 8 or the composition containing the two-dose first treatment agent for polyester synthetic fibers described in method 9, the two-dose second treatment agent for polyester synthetic fibers described in method 10, or the composition containing the two-dose second treatment agent for polyester synthetic fibers described in method 11 to water.

[0027] Method 22 is a method for treating polyester synthetic fibers, the focus of which is: in at least one of the spinning step, stretching step, and finishing step of the polyester synthetic fibers, a diluted solution of a polyester synthetic fiber treatment agent is applied to the polyester synthetic fibers; the diluted solution of the polyester synthetic fiber treatment agent is obtained by adding the three-dose first treatment agent for polyester synthetic fibers described in method 12 or the composition containing the three-dose first treatment agent for polyester synthetic fibers described in method 13, the three-dose second treatment agent for polyester synthetic fibers described in method 14 or the composition containing the three-dose second treatment agent for polyester synthetic fibers described in method 15, the three-dose third treatment agent for polyester synthetic fibers described in method 16 or the composition containing the three-dose third treatment agent for polyester synthetic fibers described in method 17 to water.

[0028] Aspect 23 is a polyester synthetic fiber, wherein the processing agent for polyester synthetic fibers according to any one of aspects 1 to 6 is attached to the fiber. Effects of the Invention

[0029] 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

[0030] <First embodiment> The first embodiment of the polyester synthetic fiber treatment agent (hereinafter referred to as the treatment agent) of the present invention is described below. The treatment agent of this embodiment contains a (poly)oxyalkylene derivative (A), the following inorganic acid compound (B), and the following organic phosphate compound (C), wherein the pH of a 1% by mass aqueous dilution of the treatment agent at 25° C. is 5.5 or more and 8.5 or less.

[0031] ((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.

[0032] 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 polyhydric alcohols, 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 amides, and block copolymers having polyoxyethylene chains and polyoxypropylene chains.

[0033] Among them, 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.

[0034] 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.

[0035] 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; and (5) hydroxycarboxylic acids such as ricinoleic acid.

[0036] 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 used, their addition method can be any one of block addition, random addition, and a combination of block addition and random addition, without special restrictions.

[0037] 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.

[0038] Specific examples of the aliphatic amine used as a raw material of the (poly)oxyalkylene derivative (A) include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine, octadecylamine, coconut amine and the like.

[0039] 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.

[0040] 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.

[0041] Specific examples of the (poly)oxyalkylene derivative (A) include compounds obtained by adding ethylene oxide to decanol and then adding propylene oxide, compounds obtained by adding ethylene oxide to C12-13 branched alcohols, compounds obtained by randomly adding ethylene oxide and propylene oxide to C12-13 branched alcohols, compounds obtained by randomly adding ethylene oxide and propylene oxide to C11-14 alcohols, compounds obtained by randomly adding ethylene oxide and propylene oxide to C12-13 branched alcohols and then adding ethylene oxide, compounds obtained by randomly adding ethylene oxide and propylene oxide to tridecanol, compounds obtained by adding propylene oxide to isodecyl alcohol and then adding ethylene oxide, compounds obtained by randomly adding ethylene oxide and propylene oxide to isodecyl alcohol, compounds obtained by adding ethylene oxide to isotridecyl alcohol and then adding propylene oxide, compounds obtained by adding ethylene oxide to dodecanol, compounds obtained by adding ethylene oxide to dodecanol and then adding propylene oxide, compounds obtained by reacting dodecylamine with ethylene oxide, compounds obtained by adding ethylene oxide to octadecyl alcohol, compounds obtained by adding ethylene oxide to lauric acid, compounds obtained by adding ethylene oxide to coconut alkylamine, compounds obtained by adding propylene oxide to diglycerol and then adding ethylene oxide, compounds obtained by adding propylene oxide to propylene glycol, compounds obtained by adding ethylene oxide to nonylphenol, and salts of compounds obtained by reacting dodecylamine with ethylene oxide and phosphoric acid.

[0042] 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.

[0043] 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.

[0044] (Inorganic acid compound (B)) Examples of the inorganic acid compound (B) used in the treatment agent of the present embodiment include sulfuric acid, nitric acid, hydrochloric acid, and salts thereof. The inorganic acid compound (B) can particularly suppress a decrease in the strength of the fiber to which the treatment agent is applied.

[0045] The salt of an inorganic acid is preferably neutral or acidic in aqueous solution, and more preferably acidic. Specific examples of the salt of an inorganic acid include sodium hydrogen sulfate, potassium hydrogen sulfate, potassium sulfate, sodium sulfate, and aluminum sulfate.

[0046] As these inorganic acid compounds (B), one kind of inorganic acid compound may be used alone, or two or more kinds of inorganic acid compounds may be used in appropriate combination. In the treatment agent, the lower limit of the content ratio of the inorganic acid compound (B) is preferably 1% by mass or more, and more preferably 2% by mass or more. When the content ratio of the inorganic acid compound (B) is 1% by mass or more, the pH of the treatment agent can be adjusted to a suitable range, and the reduction in the strength of the fiber to which the treatment agent is applied can be suppressed. In addition, the upper limit of the content ratio of the inorganic acid compound (B) is preferably 10% by mass or less, and more preferably 7% by mass or less. When the content ratio of the inorganic acid compound (B) is 10% by mass or less, the pH of the treatment agent can be adjusted to a suitable range, and the emulsification stability when the treatment agent is made into a water diluent can be improved. In addition, the metal friction when the treatment agent is wetted to the fiber can be reduced. Among them, it can also be the range of any combination of the above upper and lower limits.

[0047] (Organophosphate compound (C)) The organic phosphate compound (C) used in the treatment agent of the present embodiment includes organic phosphates and salts thereof having an alkyl group having 16 to 20 carbon atoms in the molecule. The organic phosphate compound (C) can reduce the adhesiveness of the fiber surface to which the treatment agent is applied.

[0048] The alkyl group constituting the organic phosphate compound may be, for example, a straight chain or a branched compound. Specific examples of the alkyl group include hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, isohexadecyl, isoheptadecyl, isooctadecyl, isonadecyl, and isoeicosyl.

[0049] The phosphoric acid constituting the organic phosphoric acid ester compound is not particularly limited and may be orthophosphoric acid or polyphosphoric acid such as diphosphoric acid. When a salt of an organic phosphoric acid ester is used, examples of the salt include phosphate ester amine salts, phosphate ester ammonium salts, and phosphate ester metal salts.

[0050] 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.

[0051] 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 alkylamine ethers such as polyoxyethylene laurylamine ether and polyoxyethylene stearylamine ether.

[0052] Specific examples of the organic phosphoric acid ester compound (C) include cetyl phosphate, cetyl phosphate salts, stearyl phosphate, and stearyl phosphate salts.

[0053] 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.

[0054] 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.

[0055] In the treatment agent, when the total content of the (poly)oxyalkylene derivative (A), the inorganic 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 inorganic 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.

[0056] (pH of treatment agent) The lower limit of the pH of a 1 mass % water dilution of the treatment agent at 25°C is 5.5 or more, preferably 5.6 or more. When the pH is 5.5 or more, the emulsification stability of the treatment agent when it is made into a water dilution can be improved. The upper limit of the pH of a 1 mass % water dilution of the treatment agent at 25°C is 8.5 or less, preferably 8.3 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.

[0057] (Save method) The treatment agent may be a single-dose form comprising the above-mentioned components (A) to (C), or may be a two-dose form or a three-dose form as shown below from the viewpoint of improving the stability of the formulation.

[0058] The two-component treatment agent is constituted to include, in a set, a two-component first treatment agent for polyester-based synthetic fibers containing a (poly)oxyalkylene derivative (A) (hereinafter referred to as "two-component first treatment agent"), and a two-component second treatment agent for polyester-based synthetic fibers containing an organic phosphate compound (C) (hereinafter referred to as "two-component second treatment agent"). Either or both of the two-component first treatment agent and the two-component second treatment agent contain an inorganic acid compound (B).

[0059] The two-part treatment agent is prepared by mixing the two-part first treatment agent and the two-part second treatment agent as separate agents before use, for example, during storage or distribution. When the two-part treatment agent is used, the two-part first treatment agent and the two-part second treatment agent are mixed to prepare a mixture.

[0060] The three-part treatment agent is composed of a group of: a three-part first treatment agent for polyester synthetic fibers containing a (poly)oxyalkylene derivative (A) (hereinafter referred to as the "three-part first treatment agent"), a three-part second treatment agent for polyester synthetic fibers containing an organic phosphate compound (C) (hereinafter referred to as the "three-part second treatment agent"), and a three-part third treatment agent for polyester synthetic fibers containing an inorganic acid compound (B) (hereinafter referred to as the "three-part third treatment agent").

[0061] The three-part treatment agent is composed of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent as separate agents before use, for example, during storage or distribution. When the three-part treatment agent is used, the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent are mixed to prepare a mixture.

[0062] (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.

[0063] 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.

[0064] 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.

[0065] (1-1) The treatment agent of the first embodiment contains the (poly)oxyalkylene derivative (A), the inorganic acid compound (B), and the organic phosphate compound (C), and the pH of a 1 mass % aqueous dilution of the treatment agent at 25° C. is adjusted to be 5.5 or more and 8.5 or less.

[0066] 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.

[0067] In addition, the metal friction caused by the treatment agent on the fibers during the wet process can be reduced, thereby improving the production efficiency. (1-2) The treatment agent of the first embodiment may also be constituted to include, in a set, a first treatment agent of two components containing a (poly)oxyalkylene derivative (A) and a second treatment agent of two components containing an organic phosphate compound (C). Either or both of the first treatment agent of two components and the second treatment agent of two components contain an inorganic acid compound (B). According to this configuration, the formulation stability, especially the storage stability, of the treatment agent can be improved.

[0068] (1-3) The treatment agent of the first embodiment may also be constituted to include, in a set, a first treatment agent of three components containing a (poly)oxyalkylene derivative (A), a second treatment agent of three components containing an organic phosphate compound (C), and a third treatment agent of three components containing an inorganic acid compound (B). According to this configuration, the formulation stability, especially the storage stability, of the treatment agent can be improved.

[0069] <Second embodiment> Next, a second embodiment in which the two-part first treatment agent of the present invention is embodied will be described, with the description mainly focusing on the differences from the above-described embodiment.

[0070] The 2-part first treatment agent of this embodiment contains a (poly)oxyalkylene derivative (A). The 2-part first treatment agent is used together with a 2-part second treatment agent or a composition containing a 2-part second treatment agent for polyester-based synthetic fibers (hereinafter referred to as "a composition containing a 2-part second treatment agent"), wherein the 2-part second treatment agent contains an organic phosphate compound (C), and the composition containing the 2-part second treatment agent contains a 2-part second treatment agent and a solvent (S). Either or both of the 2-part first treatment agent and the 2-part second treatment agent contain an inorganic acid compound (B). In addition, when the mixture of the 2-part first treatment agent and the 2-part second treatment agent is set as a 1% 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.

[0071] When the mixture of the two-part first treatment agent and the two-part second treatment agent is a composition containing the two-part second treatment agent (wherein water is used as the solvent (S)), the pH is measured by the following method.

[0072] When the mixture of the two-part first treatment agent and the two-part second treatment agent is a 1% by mass water dilution of the treatment agent or more, the mixture is diluted to a 1% by mass water dilution of the treatment agent and then the pH at 25°C is measured.

[0073] When the mixture of the two-part first treatment agent and the two-part second treatment agent is a water dilution of less than 1% by mass of the treatment agent, the mixture is first dried or concentrated to a 1% by mass water dilution of the treatment agent and then the pH at 25°C is measured.

[0074] When the mixture of the two-part first treatment agent and the two-part second treatment agent is a composition containing the two-part second treatment agent (wherein the solvent (S) contains a solvent other than water), the pH is measured by the following method.

[0075] The solvent is removed from the mixture of the two-part first treatment agent and the two-part second treatment agent, and then the mixture is diluted with 1 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.

[0076] The (poly)oxyalkylene derivative (A), the inorganic acid compound (B), the organic phosphoric acid ester compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The two-component first treatment agent of this embodiment can also be mixed with a solvent as appropriate to prepare a composition containing the two-component first treatment agent for polyester synthetic fibers (hereinafter referred to as "a composition containing the two-component first treatment agent"), and stored or circulated as a composition containing the two-component first treatment agent.

[0077] The solvent may be those exemplified in the first embodiment. In the composition containing the two-component first treatment agent, when the total content of the two-component first treatment agent and the solvent is 100 parts by mass, the two-component first treatment agent is preferably contained in an amount of 10 parts by mass or more.

[0078] The effects of the two-component 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 two-part first treatment agent of the second embodiment contains a (poly)oxyalkylene derivative (A), and is used together with the two-part second treatment agent containing an organic phosphate compound (C) when used. Therefore, the formulation stability, especially the storage stability, of the two-part first treatment agent can be improved. In addition, by adjusting the mixing ratio with the two-part second treatment agent, the composition of the resulting treatment agent can be adjusted. In addition, the two-part first treatment agent and the two-part second treatment agent can be circulated separately.

[0079] <Third embodiment> Next, a third embodiment in which the two-component second treatment agent of the present invention is embodied will be described, with the description focusing on the differences from the above-described embodiment.

[0080] The 2-part second treatment agent of this embodiment contains an organic phosphate compound (C). The 2-part second treatment agent is used in combination with the 2-part first treatment agent or a composition containing the 2-part first treatment agent, wherein the 2-part first treatment agent contains a (poly)oxyalkylene derivative (A), and the composition containing the 2-part first treatment agent contains the 2-part first treatment agent and a solvent (S). Either or both of the 2-part first treatment agent and the 2-part second treatment agent contain an inorganic acid compound (B). In addition, when the mixture of the 2-part first treatment agent and the 2-part second treatment agent is set as a 1% 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. In addition, when the mixture of the 2-part first treatment agent and the 2-part second treatment agent is a composition containing the 2-part first treatment agent (using a solvent (S)), the pH is measured by the same method as the method described in the second embodiment.

[0081] The (poly)oxyalkylene derivative (A), the inorganic acid compound (B), the organic phosphoric acid ester compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The two-component second treatment agent of this embodiment may be mixed with a solvent as appropriate to prepare a composition containing the two-component second treatment agent, and the composition may be stored or distributed as the composition containing the two-component second treatment agent.

[0082] The solvent may be those exemplified in the first embodiment. In the composition containing the two-component second treatment agent, when the total content of the two-component second treatment agent and the solvent is 100 parts by mass, the two-component first treatment agent is preferably contained in an amount of 10 parts by mass or more.

[0083] The effects of the two-component 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 two-part second treatment agent of the third embodiment contains an organic phosphate compound (C) and is used together with the two-part first treatment agent containing a (poly)oxyalkylene derivative (A) when used. Therefore, the formulation stability, especially the storage stability, of the two-part second treatment agent can be improved. In addition, by adjusting the mixing ratio with the two-part first treatment agent, the composition of the resulting treatment agent can be adjusted. In addition, the two-part second treatment agent can be circulated separately from the two-part first treatment agent.

[0084] <Fourth embodiment> Next, a fourth embodiment in which the three-component first treatment agent of the present invention is embodied will be described, with the description focusing on the differences from the above-described embodiment.

[0085] The three-component first treatment agent of this embodiment contains a (poly)oxyalkylene derivative (A). When used, the three-component first treatment agent is used together with a three-component second treatment agent or a composition containing a three-component second treatment agent for polyester synthetic fibers (hereinafter referred to as "a composition containing a three-component second treatment agent"), and a three-component third treatment agent or a composition containing a three-component third treatment agent for polyester synthetic fibers (hereinafter referred to as "a composition containing a three-component third treatment agent"), wherein the three-component second treatment agent contains an organic phosphate compound (C), the composition containing the three-component second treatment agent contains a three-component second treatment agent and a solvent (S), the three-component third treatment agent contains an inorganic acid compound (B), and the composition containing the three-component third treatment agent contains a three-component third treatment agent and a solvent (S).

[0086] When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a 1 mass % water dilution of the treatment agent, the pH at 25° C. is within the range of 5.5 to 8.5. When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a composition containing the three-part second treatment agent or a composition containing the three-part third treatment agent (using a solvent (S)), the pH is measured by the same method as described in the second embodiment.

[0087] The (poly)oxyalkylene derivative (A), the inorganic acid compound (B), the organic phosphoric acid ester compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The three-component first treatment agent of this embodiment can also be mixed with a solvent (S) as appropriate to prepare a composition containing the three-component first treatment agent for polyester synthetic fibers (hereinafter referred to as "a composition containing the three-component first treatment agent"), and stored or circulated as a composition containing the three-component first treatment agent.

[0088] The solvent (S) may be those exemplified in the first embodiment. In the composition containing the three-component first treatment agent, when the total content of the three-component first treatment agent and the solvent is 100 parts by mass, the three-component first treatment agent is preferably contained in an amount of 10 parts by mass or more.

[0089] The effects of the three-component first treatment agent of 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 three-part first treatment agent of the fourth embodiment contains a (poly)oxyalkylene derivative (A), and is used together with a three-part second treatment agent containing an organic phosphate compound (C) and a three-part third treatment agent containing an inorganic acid compound (B). Therefore, the formulation stability, especially the storage stability, of the three-part first treatment agent can be improved. In addition, by adjusting the mixing ratio with the three-part second and third treatment agents, the composition of the resulting treatment agent can be adjusted. In addition, the three-part first treatment agent can be circulated separately from the three-part second and third treatment agents.

[0090] <Fifth embodiment> Next, a fifth embodiment in which the three-component second treatment agent of the present invention is embodied will be described, with the description mainly focusing on the differences from the above-described embodiment.

[0091] The three-part second treatment agent of this embodiment contains an organic phosphate compound (C). The three-part second treatment agent is used together with a three-part first treatment agent or a composition containing the three-part first treatment agent, and a three-part third treatment agent or a composition containing the three-part third treatment agent, wherein the three-part first treatment agent contains a (poly)oxyalkylene derivative (A), the composition containing the three-part first treatment agent contains the three-part first treatment agent and a solvent (S), the three-part third treatment agent contains an inorganic acid compound (B), and the composition containing the three-part third treatment agent contains the three-part third treatment agent and a solvent (S).

[0092] When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a 1 mass % water dilution of the treatment agent, the pH at 25° C. is within the range of 5.5 to 8.5. When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a composition containing the three-part first treatment agent or a composition containing the three-part third treatment agent (using a solvent (S)), the pH is measured by the same method as described in the second embodiment.

[0093] The (poly)oxyalkylene derivative (A), the inorganic acid compound (B), the organic phosphoric acid ester compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The three-component second treatment agent of this embodiment may be mixed with a solvent (S) as appropriate to prepare a composition containing the three-component second treatment agent, and the composition may be stored or distributed as the composition containing the three-component second treatment agent.

[0094] The solvent (S) may be those exemplified in the first embodiment. In the composition containing the three-component second treatment agent, when the total content of the three-component second treatment agent and the solvent is 100 parts by mass, the three-component second treatment agent is preferably contained in an amount of 10 parts by mass or more.

[0095] The effects of the three-component second treatment agent of the fifth embodiment will be described. The fifth embodiment has the following effects in addition to the effects of the above-mentioned embodiments. (5-1) The three-part second treatment agent of the fifth embodiment contains an organic phosphate compound (C), and is used together with the three-part first treatment agent containing a (poly)oxyalkylene derivative (A) and the three-part third treatment agent containing an inorganic acid compound (B). Therefore, the formulation stability, especially the storage stability, of the three-part second treatment agent can be improved. In addition, by adjusting the mixing ratio with the three-part first and third treatment agents, the composition of the resulting treatment agent can be adjusted. In addition, the three-part second treatment agent can be circulated separately from the three-part first and third treatment agents.

[0096] <Sixth embodiment> Next, a sixth embodiment of the three-component third treatment agent of the present invention will be described, with the differences from the above-described embodiments being mainly described.

[0097] The three-part third treatment agent of this embodiment contains an inorganic acid compound (B). The three-part third treatment agent is used together with a three-part first treatment agent or a composition containing the three-part first treatment agent, and a three-part second treatment agent or a composition containing the three-part second treatment agent, wherein the three-part first treatment agent contains a (poly)oxyalkylene derivative (A), the composition containing the three-part first treatment agent contains the three-part first treatment agent and a solvent (S), the three-part second treatment agent contains an organic phosphate compound (C), and the composition containing the three-part second treatment agent contains the three-part second treatment agent and a solvent (S).

[0098] When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a 1 mass % water dilution of the treatment agent, the pH at 25° C. is within the range of 5.5 to 8.5. When the mixture of the three-part first treatment agent, the three-part second treatment agent, and the three-part third treatment agent is a composition containing the three-part first treatment agent or a composition containing the three-part second treatment agent (using a solvent (S)), the pH is measured by the same method as described in the second embodiment.

[0099] The (poly)oxyalkylene derivative (A), the inorganic acid compound (B), the organic phosphoric acid ester compound (C), and the solvent (S) are the same as the components described in the first embodiment. (Solvent) The three-component third treatment agent of this embodiment may be mixed with a solvent (S) as appropriate to prepare a composition containing the three-component third treatment agent, and the composition may be stored or distributed as the composition containing the three-component third treatment agent.

[0100] The solvent (S) may be those exemplified in the first embodiment. In the composition containing the three-component third treatment agent, when the total content of the three-component third treatment agent and the solvent is 100 parts by mass, the three-component third treatment agent is preferably contained in an amount of 10 parts by mass or more.

[0101] The effects of the three-component third treatment agent of the sixth embodiment will be described. The sixth embodiment has the following effects in addition to the effects of the above-mentioned embodiments. (6-1) The three-part third treatment agent of the sixth embodiment contains an inorganic acid compound (B), and is used together with the three-part first treatment agent containing a (poly)oxyalkylene derivative (A) and the three-part second treatment agent containing an organic phosphate compound (C). Therefore, the formulation stability, especially the storage stability, of the three-part third treatment agent can be improved. In addition, by adjusting the mixing ratio with the three-part first and second treatment agents, the composition of the resulting treatment agent can be adjusted. In addition, the three-part third treatment agent can be circulated separately from the three-part first and second treatment agents.

[0102] <Seventh embodiment> Next, a seventh embodiment of the method for treating polyester synthetic fibers (hereinafter referred to as “fiber treating method”) of the present invention will be described.

[0103] 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.

[0104] When the treatment agent is a two-dose type, the fiber treatment method of the present embodiment is characterized in that: a diluent containing a solvent, a two-dose type first treatment agent of the second embodiment, and a two-dose type second treatment agent of the third embodiment is applied to the polyester synthetic fiber. The preparation method of the diluent can include, for example, a method of adding a two-dose type first treatment agent or a composition containing the two-dose type first treatment agent, and a two-dose type second treatment agent or a composition containing the two-dose type second treatment agent to a solvent. The diluent is preferably prepared by adding a two-dose type first treatment agent or a composition containing the two-dose type first treatment agent, and a two-dose type second treatment agent or a composition containing the two-dose type second treatment agent to water. The content ratio between the two-dose type first treatment agent and the two-dose type second treatment agent is preferably a mass ratio of non-volatile components, that is, the two-dose type first treatment agent / the two-dose type second treatment agent=95 / 5 to 5 / 95. By defining it within this range, the operability can be improved. 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 matter.

[0105] When the treatment agent is a three-part treatment agent, the fiber treatment method of this embodiment is characterized in that a diluent of the treatment agent including a solvent, a first treatment agent of a third part of the fourth embodiment, a second treatment agent of a third part of the fifth embodiment, and a third treatment agent of a third part of the sixth embodiment is applied to the polyester synthetic fiber. The preparation method of the diluent includes, for example, a method of adding a first treatment agent of a third part or a composition containing the first treatment agent of a third part, a second treatment agent of a third part or a composition containing the second treatment agent of a third part, and a third treatment agent of a third part or a composition containing the third treatment agent of a third part to a solvent. The diluent is preferably a preparation obtained by adding a first treatment agent of a third part or a composition containing the first treatment agent of a third part, a second treatment agent of a third part or a composition containing the second treatment agent of a third part, and a third treatment agent of a third part or a composition containing the third treatment agent of a third part to water.

[0106] 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.

[0107] In the method of using two types of first treatment agents and two types of second treatment agents together, or in the method of using three types of first treatment agents, three types of second treatment agents, and three types of third treatment agents 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 having the best fiber properties or fiber manufacturing properties at any time by finely adjusting the mixing ratio.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] There is no particular restriction on the proportion of the diluent attached to the fiber. It is preferred that the diluent be attached to the fiber so that the final solid content 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.

[0113] The fiber to which the diluent is applied may be dried or heated by a known method. The solvent such as water is evaporated by drying or heating to obtain the fiber to which the treatment agent or the components contained in the first treatment agent, the second treatment agent, and the third treatment agent are attached.

[0114] The effects of the fiber processing method according to the seventh embodiment will be described. The seventh embodiment has the following effects in addition to the effects of the above-mentioned embodiments. (7-1) The fiber treatment method of the seventh 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 a 2-dose first treatment agent or a composition containing a 2-dose first treatment agent, and a 2-dose second treatment agent or a composition containing a 2-dose second treatment agent to water for modulation, a diluent having excellent emulsification stability can be obtained. Alternatively, by adding a 3-dose first treatment agent or a composition containing a 3-dose first treatment agent, a 3-dose second treatment agent or a composition containing a 3-dose second treatment agent, and a 3-dose third treatment agent or a composition containing a 3-dose third 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.

[0115] 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 seventh embodiment may be adopted.

[0116] ·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 that are usually used in treatment agents other than solvents 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

[0117] 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 %. Test Category 1 (Preparation of 1-dosage treatment agent)

[0118] (Example 1-1) As shown in Table 1, the treatment agent of Example 1-1 was prepared, which contained approximately 67.2 parts (%) of the (poly)oxyalkylene derivative (A-1) shown in Table 2 as the (poly)oxyalkylene derivative (A), approximately 3.9 parts (%) of sulfuric acid (B-1) as the inorganic acid compound (B), approximately 28.8 parts (%) of stearyl phosphate and its potassium salt (C-4) as the organic phosphate compound (C), and 1 part of amino-modified polydimethylsiloxane (D-2) as other component (D) (relative to 100 parts in total of components (A) to (C)).

[0119] (Example 1-2 to Example 1-21, Comparative Example 1-1 to Comparative Example 1-9) The treatment agents of Examples 1-2 to 1-21 and Comparative Examples 1-1 to 1-9 were prepared in the same manner as the treatment agent of Example 1-1, comprising a (poly)oxyalkylene derivative (A), an inorganic acid compound (B), an organic phosphate compound (C), and other components (D) in the proportions shown in Table 1.

[0120] The type and content of the (poly)oxyalkylene derivative (A), the type and content of the inorganic 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 "inorganic 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 inorganic acid compound (B), and the organic phosphate compound (C) in the treatment agent is 100 parts.

[0121] (pH of treatment agent) The treatment agent of each example was diluted with warm water at about 70° C. to prepare a 1% water dilution of the treatment agent. The pH of the prepared 1% water dilution was measured at 25° C. The measured values ​​are shown in the “pH of 1% water dilution” column of Table 1.

[0122] [Table 1]

[0123] The details of the (poly)oxyalkylene derivative (A), the inorganic 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-18 described in the following Table 2 were used.

[0124] [Table 2]

[0125] The details of components 1 to 25 shown in Table 2 are as follows. Component 1: A compound obtained by adding 2 moles of ethylene oxide to 1 mole of decanol and then adding 5 moles of propylene oxide Component 2: Compound obtained by adding 10 moles of ethylene oxide to 1 mole of C12-13 branched alcohol Component 3: Compound obtained by randomly adding 6 moles of ethylene oxide and 2 moles of propylene oxide to 1 mole of C12-13 branched alcohol Component 4: Compound formed by randomly adding 4 moles of ethylene oxide and 4 moles of propylene oxide to 1 mole of C11-14 alcohol Component 5: A compound obtained by randomly adding 4 moles of ethylene oxide and 2 moles of propylene oxide to 1 mole of a C12-13 branched alcohol, and then further adding 2 moles of ethylene oxide Component 6: A compound obtained by randomly adding 6 mol of ethylene oxide and 2 mol of propylene oxide to 1 mol of tridecanol Component 7: A compound obtained by adding 3 moles of propylene oxide to 1 mole of isodecyl alcohol and then adding 4 moles of ethylene oxide Component 8: A compound obtained by randomly adding 5 mol of ethylene oxide and 2 mol of propylene oxide to 1 mol of isodecyl alcohol Component 9: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of isotridecanol and then adding 5 moles of propylene oxide Component 10: A compound formed by adding 4 mol of ethylene oxide to 1 mol of dodecanol Component 11: A compound formed by adding 7 mol of ethylene oxide to 1 mol of dodecanol Component 12: A compound formed by adding 10 mol of ethylene oxide to 1 mol of dodecanol Component 13: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of dodecanol and then adding 5 moles of propylene oxide Component 14: Compound formed by reacting 1 mol of dodecylamine with 10 mol of ethylene oxide Component 15: Compound formed by reacting 1 mol of dodecylamine with 12 mol of ethylene oxide Component 16: Compound formed by reacting 1 mol of dodecylamine with 15 mol of ethylene oxide Component 17: Compound formed by adding 10 mol of ethylene oxide to 1 mol of octadecyl alcohol Component 18: Compound formed by adding 10 mol of ethylene oxide to 1 mol of lauric acid Component 19: A compound formed by adding 10 moles of ethylene oxide to 1 mole of coconut alkylamine Component 20: A compound formed by adding 15 moles of ethylene oxide to 1 mole of coconut alkylamine Component 22: A compound obtained by adding 84 moles of propylene oxide to 1 mole of diglycerol, and then adding 23 moles of ethylene oxide Component 23: A compound obtained by adding 43 moles of propylene oxide to 1 mole of propylene glycol and then adding 6 moles of ethylene oxide Ingredient 24: Compound formed by adding 10 moles of ethylene oxide to 1 mole of nonylphenol Ingredient 25: Salt of a compound obtained by reacting 1 mol of dodecylamine with 10 mol of ethylene oxide and phosphoric acid (Inorganic acid compound (B)) B-1: Sulfuric acid B-2: Nitric Acid B-3: Hydrochloric acid B-4: Potassium hydrogen sulfate B-5: Potassium sulfate (Organophosphate compound (C)) C-1 to C-10 listed in Table 3 below were used. Rc-1 and Rc-2 were used as the compounds corresponding to the comparative examples. The organic phosphate compounds (C) listed in Table 3 below are various organic phosphates partially neutralized with KOH, i.e., mixtures of organic phosphates and potassium salts of organic phosphates. The organic phosphate compounds D-6 and D-8 described below are also the same.

[0126] [Table 3]

[0127] 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 3.

[0128] [Number 1]

[0129] 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 (mL) of a 0.1 mol / L potassium hydroxide methanol standard solution used up to the inflection point.

[0130] (Other ingredients (D)) D-1: Polydimethylsiloxane D-2: Amino modified polydimethylsiloxane D-3: Potassium Oleate D-4: Polyvinyl alcohol (average degree of polymerization 300, saponification degree 80) D-5: Stearyl Alcohol D-6: Hexyl phosphate and its potassium salt (acid value 10.0 [KOH-mg / g]) D-7: Potassium Lactate D-8(rc-1): Octyl phosphate and its potassium salt (acid value 27.5 [KOH-mg / g]) Test Category 2 (metal friction when wet) Each treatment agent prepared in test category 1 was diluted with warm water at about 70°C to prepare a 5% dilution of the treatment agent. 80 mL of the prepared 5% dilution was poured into a metal tank (60 mm long × 230 mm wide × 20 mm high) and fixed. A polyester spunbond nonwoven fabric of the same size as the bottom (30 mm long × 90 mm wide × 45 mm high) was attached to the bottom of a 1 kg weight (30 mm long × 90 mm wide × 45 mm high). The weight attached with the nonwoven fabric was placed in the metal tank filled with the dilution. The tension of each test sample when stretched at a horizontal speed of 100 mm / min in an atmosphere of 20°C-60% RH was measured using a tensile testing machine (manufactured by Shimadzu Corporation, Autograph: Model AGS-X) with a maximum load capacity of 50N. However, from the viewpoint of reproducibility or accuracy, the friction was measured within 12 hours from the start of adjustment to the 5% dilution. The results are shown in the "Wet Metal Friction" column of Table 1. The "-" in Table 1 was not evaluated because the component B (that is, the inorganic acid compound (B)) was not contained.

[0131] Evaluation criteria for metal friction when wet (Good): Ratio of friction N when no B component is present to friction M during measurement (M / N) ≤ 0.98 × (bad): Ratio of friction N when component B is not included to friction M during measurement (M / N) > 0.98 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.

[0132] ·Evaluation criteria for adhesion (Good): The appearance after temperature adjustment is solid and does not feel sticky when touched by hand. ○ (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 dilution was applied by spraying to a polyester fiber (1.3de×38mm) that had not yet been given a treatment agent, so that the amount of 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.

[0133] Fiber strength evaluation criteria (Good): Strength after 3 months is more than 95% 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 (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.

[0134] Evaluation criteria for emulsion stability (Good): No precipitate generation and no sedimentation in the lower layer ○ (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 after manual stirring with a stirring rod Test Category 6 (Preparation of the first treatment agent in two dosage forms)

[0135] (2-dose type 1st treatment agent (IA-1)) As shown in Table 4, a two-part first treatment agent (IA-1) was prepared, which contained 94.5 parts (%) of the (poly)oxyalkylene derivative (A-1) shown in Table 2 as the (poly)oxyalkylene derivative (A) and 5.5 parts (%) of sulfuric acid (B-1) as the inorganic acid compound (B). (2-dose first treatment agent (IA-2) to (IA-21), 2-dose first treatment agent (IB-1) to (IB-18), 2-dose first treatment agent (IC-1) to (IC-2)) In the same manner as in the two-part first treatment agent (IA-1), a (poly)oxyalkylene derivative (A) and an inorganic acid compound (B) were prepared in the ratio shown in Table 4.

[0136] The type and content of the (poly)oxyalkylene derivative (A), and the type and content of the inorganic acid compound (B) are shown in the "(poly)oxyalkylene derivative (A)" column and the "inorganic acid compound (B)" column of Table 4, respectively.

[0137] [Table 4]

[0138] Test Category 7 (Preparation of the second treatment agent in two dosage forms) (2-dose type 2nd treatment agent (II-A-1)) As shown in Table 5, a two-part second treatment agent (II-A-1) was prepared, which contained 100 parts (%) of cetyl phosphate and its potassium salt (C-1) as the organic phosphate compound (C).

[0139] (2-dose type 2nd treatment agent (II-A-2) to (II-A-10), 2-dose type 2nd treatment agent (II-B-1) to (II-B-21), 2-dose type 2nd treatment agent (II-C-1) to (II-C-2)) In the same manner as in the two-part second treatment agent (II-A-1), an organic phosphate compound (C) and an inorganic acid compound (B) were prepared in the ratio shown in Table 5.

[0140] The type and content of the organic phosphate compound (C) and the type and content of the inorganic acid compound (B) are shown in the "Organic phosphate compound (C)" column and the "Inorganic acid compound (B)" column of Table 5, respectively.

[0141] Table 5

[0142] Test Category 8 (Evaluation of Stability of Preparations) · Evaluation of the formulation stability of the first treatment agent of the second dosage form The composition containing the first treatment agent of the second dosage form and water as a solvent (S) (mass ratio of the first treatment agent of the second dosage form: water = 95:5) 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 4.

[0143] · Evaluation of the formulation stability of the second treatment agent in the second dosage form The composition containing the second treatment agent of the second treatment agent of the second treatment agent of the second treatment agent of the second treatment agent of the second treatment agent and water as a solvent (S) (mass ratio of the second treatment agent ...

[0144] Evaluation criteria for formulation stability (compositions containing two-dose first treatment agents and compositions containing two-dose second treatment agents) ○ (good): no gelation × (unqualified): gelled Test Category 9 (Preparation of a treatment agent consisting of a 2-dose first treatment agent and a 2-dose second treatment agent) (Example 2-A-1) The treatment agent of Example 2-A-1 was prepared by mixing 71.2% (parts) of the 2-dose first treatment agent (IA-1) and 28.8% (parts) of the 2-dose second treatment agent (II-A-4) shown in Table 6, and also mixing 1 part of the treatment agent (2-dose III-1) as other treatment agent (D) shown in Table 7 (relative to 100 parts in total of the 2-dose first treatment agent and the 2-dose second treatment agent).

[0145] (Examples (2-A-2) to (2-A-21), Examples (2-B-1) to (2-B-21), Examples (2-W-1) to (2-W-2)) The treatment agent of each example is prepared in the same manner as Example 2-A-1. In addition to mixing the 2-part 1 treatment agent and the 2-part 2 treatment agent shown in Table 6, other treatment agents (D) shown in Table 7 are mixed as needed.

[0146] The type and mass ratio of the 2-part first treatment agent, the type and mass ratio of the 2-part second treatment agent, and the type and mass ratio of the other treatment agent (D) are shown in the "2-part first treatment agent" column, the "2-part second treatment agent" column, and the "other treatment agent (D)" column of Table 6, respectively. The content of the other treatment agent (D) represents the blending amount (parts) when the total blending amount of the 2-part first treatment agent and the 2-part second treatment agent is 100 parts.

[0147] (pH determination) The two-part first treatment agent and the two-part second treatment agent shown in Table 6 were mixed and diluted with warm water at about 70°C to prepare a 1% water dilution of the treatment agent. In the case where another treatment agent (D) was used, the two-part first treatment agent, the two-part second treatment agent, and the other treatment agent (D) were mixed and then diluted with warm water at about 70°C to prepare a 1% water dilution of the treatment agent. The pH of the 1% water dilution prepared in each case was measured at 25°C. The measured values ​​are shown in the "pH of 1% water dilution" column of Table 6.

[0148] [Table 6]

[0149] The other treatment agents (D) described in Table 6 are the treatment agents (2 formulations III-1) to (2 formulations III-6) described in Table 7 below. The treatment agents (2 formulations III-1) to (2 formulations III-6) are prepared so as to contain the other treatment agents (D) in the ratios shown in Table 7.

[0150] [Table 7]

[0151] Test Category 10 (Evaluation of 2 Formulations of Treatment Agents) Using the obtained treatment agents of each example, the metal friction when wet, adhesion, fiber strength, and emulsion stability were evaluated in the same manner as in Example 1. The preparation method of the diluent used for the evaluation of metal friction when wet, adhesion, and emulsion stability was the same as the method described in the (pH measurement) column of Test Category 9, and the two-part first treatment agent, the two-part second treatment agent, and other treatment agents (D) as needed were mixed and diluted with water to prepare a diluent of the treatment agent. The results are shown in the "Metal Friction When Wet" column, "Adhesion" column, "Fiber Strength" column, and "Emulsion Stability" column of Table 6, respectively.

[0152] Test Category 11 (Preparation of the first treatment agent in three dosage forms) (3-dose type 1st treatment agent (I-1)) As shown in Table 8, a three-part first treatment agent (I-1) was prepared containing 100 parts (%) of the (poly)oxyalkylene derivative (A-1) shown in Table 2 as the (poly)oxyalkylene derivative (A).

[0153] (3-dose type 1st treatment agent (I-2) to (I-18)) In the same manner as in the three-part first treatment agent (I-1), a (poly)oxyalkylene derivative (A) containing the ratios shown in Table 8 was prepared.

[0154] The type and content of the (poly)oxyalkylene derivative (A) are shown in the column "(poly)oxyalkylene derivative (A)" in Table 8.

[0155] [Table 8]

[0156] Test Category 12 (Preparation of the second treatment agent in three dosage forms) (3-dose type 2nd treatment agent (II-1)) As shown in Table 9, three-part second treatment agent (II-1) was prepared, which contained 100 parts (%) of cetyl phosphate and its potassium salt (C-1) as the organic phosphate compound (C).

[0157] (3-dose type 2nd treatment agent (II-2) to (II-10)) In the same manner as in the three-part second treatment agent (II-1), an organic phosphate compound (C) containing the ratio shown in Table 9 was prepared.

[0158] The type and content of the organic phosphate compound (C) are shown in the "Organic phosphate compound (C)" column of Table 9.

[0159] [Table 9]

[0160] Test Category 13 (Preparation of the third treatment agent in three dosage forms) (3rd treatment agent (III-1) of 3-dose type) As shown in Table 10, a three-part third treatment agent (III-1) was prepared containing 100 parts (%) of sulfuric acid (B-1) as the inorganic acid compound (B).

[0161] (3-dose type 3rd treatment agent (III-2) to (III-5)) In the same manner as in the 3-part third treatment agent (III-1), an inorganic acid compound (B) containing the ratio shown in Table 10 was prepared.

[0162] The type and content of the inorganic acid compound (B) are shown in the "Inorganic acid compound (B)" column of Table 10.

[0163] [Table 10]

[0164] Test Category 14 (Evaluation of Stability of Drug Product) · Evaluation of the formulation stability of the first treatment agent of the 3-dose form The composition containing the three-part first treatment agent and water as a solvent (S) (mass ratio of the three-part first treatment agent: water = 95:5) 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 8.

[0165] · Evaluation of the formulation stability of the second treatment agent in the 3-dose form The composition containing the third-part second treatment agent and water as a solvent (S) (mass ratio of the third-part 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 9.

[0166] · Evaluation of the formulation stability of the third treatment agent in the third dosage form The composition containing the third treatment agent of the third formulation and water as a solvent (S) (mass ratio of the third treatment agent of the third formulation: water = 50:50) 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 10.

[0167] Evaluation criteria for formulation stability (compositions containing 3-dose first treatment agent, compositions containing 3-dose second treatment agent, compositions containing 3-dose third treatment agent) ○ (good): no gelation × (unqualified): gelled Test Category 15 (Preparation of a treatment agent consisting of a 3-dose first treatment agent, a 3-dose second treatment agent, and a 3-dose third treatment agent) (Example 3-1) The treatment agent of Example 3-1 was prepared by mixing 67.2% (parts) of the 3-part first treatment agent (I-1), 3.9% (parts) of the 3-part second treatment agent (II-1), and 28.8% (parts) of the 3-part third treatment agent (III-4) shown in Table 11, and also mixing 1 part of the treatment agent (3-part IV-2) as other treatment agent (D) shown in Table 12 (relative to 100 parts in total of the 3-part first treatment agent to the 3-part third treatment agent).

[0168] (Examples (3-2) to (3-21)) The treatment agent of each example is prepared in the same manner as Example 3-1. In addition to mixing the 3-part first treatment agent, 3-part second treatment agent, and 3-part third treatment agent shown in Table 11, other treatment agents (D) shown in Table 12 are also mixed as needed.

[0169] The type and mass ratio of the 3-part first treatment agent, the type and mass ratio of the 3-part second treatment agent, the type and mass ratio of the 3-part third treatment agent, and the type and mass ratio of the other treatment agent (D) are shown in the "3-part first treatment agent" column, "3-part second treatment agent" column, "3-part third treatment agent" column, and "other treatment agent (D)" column of Table 11, respectively. The content of the other treatment agent (D) indicates the blending amount (parts) when the total blending amount of the 3-part first treatment agent to the 3-part third treatment agent is 100 parts.

[0170] (pH determination) The three-part first treatment agent, three-part second treatment agent, and three-part third treatment agent shown in Table 11 were mixed and diluted with warm water at about 70°C to prepare a 1% water dilution of the treatment agent. In the case where another treatment agent (D) was used, the three-part first treatment agent to the three-part third treatment agent and the other treatment agent (D) were mixed and then diluted with warm water at about 70°C to prepare a 1% water dilution of the treatment agent. The pH of the 1% water dilution prepared in each case was measured at 25°C. The measured values ​​are shown in the "pH of 1% water dilution" column of Table 11.

[0171] [Table 11]

[0172] The other treatment agents (D) described in Table 11 are the treatment agents (3-dose type IV-1) to (3-dose type IV-6) described in Table 12 below. The treatment agents (3-dose type IV-1) to (3-dose type IV-6) are prepared so as to contain the other treatment agents (D) at the ratios shown in Table 12.

[0173] [Table 12]

[0174] Test Category 16 (Evaluation of 3 Formulations of Treatment Agents) Using the obtained treatment agents of each example, evaluations were performed for metal friction when wet, adhesion, fiber strength, and emulsion stability in the same manner as in Example 1. The preparation method of the diluent used for the evaluation of metal friction when wet, fiber strength, and emulsion stability was the same as the method described in the (pH measurement) column of Test Category 15, and the three-part first treatment agent, the three-part second treatment agent, the three-part third treatment agent, and other treatment agents (D) as needed were mixed and diluted with water to prepare a diluent of the treatment agent. The results are shown in the "Metal Friction When Wet" column, "Adhesion" column, "Fiber Strength" column, and "Emulsion Stability" column of Table 11, respectively.

[0175] 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.

[0176] 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 inorganic acid compound (B), and the following organic phosphate compound (C); It is characterized in that The pH of a 1 mass % aqueous dilution of the polyester synthetic fiber treating agent at 25° C. is 5.5 or more and 8.5 or less;

[0177] Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof.

[0178] (Appendix 2) The polyester synthetic fiber treating agent as described in Appendix 1, wherein When the total content of the (poly)oxyalkylene derivative (A), the inorganic 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 inorganic 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.

[0179] (Appendix 3) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The method comprises a first treatment agent for polyester synthetic fibers in two parts, which contains the (poly)oxyalkylene derivative (A), and a second treatment agent for polyester synthetic fibers in two parts, which contains the organic phosphate compound (C). Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the inorganic acid compound (B).

[0180] (Appendix 4) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The composition comprises, in a group form, a first three-part treatment agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), a second three-part treatment agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C), and a third three-part treatment agent for polyester synthetic fibers containing the above-mentioned inorganic acid compound (B).

[0181] (Appendix 5) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The polyester-based synthetic fibers are polyester staple fibers.

[0182] (Appendix 6) The polyester synthetic fiber treating agent as described in Appendix 1, wherein The polyester synthetic fibers are produced by spinning.

[0183] (Appendix 7) 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 6 and the following solvent (S);

[0184] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 8) A two-component first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a two-component second treatment agent for polyester synthetic fibers or a composition comprising the two-component second treatment agent for polyester synthetic fibers; The above-mentioned two-dose second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); The above-mentioned composition containing the two-component second treatment agent for polyester-based synthetic fibers contains the above-mentioned two-component second treatment agent for polyester-based synthetic fibers and the following solvent (S); It is characterized in that Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the following inorganic acid compound (B); When the mixture of the two-component first treatment agent for polyester synthetic fibers and the two-component second treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0185] Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0186] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 9) A composition containing a two-part first treatment agent for polyester synthetic fibers, characterized in that: Containing the first treatment agent of the two-part type for polyester synthetic fibers as described in Appendix 8 and the following solvent (S);

[0187] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 10) A two-component second treatment agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a two-component first treatment agent for polyester synthetic fibers or a composition comprising the two-component first treatment agent for polyester synthetic fibers; The two-part first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); The above-mentioned composition containing the two-component first treatment agent for polyester-based synthetic fibers contains the above-mentioned two-component first treatment agent for polyester-based synthetic fibers and the following solvent (S); It is characterized in that Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the following inorganic acid compound (B); When the mixture of the two-component first treatment agent for polyester synthetic fibers and the two-component second treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0188] Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0189] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 11) A composition containing a two-part second treatment agent for polyester synthetic fibers, characterized in that: Containing the second treatment agent of two dosage forms for polyester synthetic fibers as described in Appendix 10 and the following solvent (S);

[0190] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 12) A three-component first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a three-component second treatment agent for polyester synthetic fibers or a composition comprising the three-component second treatment agent for polyester synthetic fibers, and a three-component third treatment agent for polyester synthetic fibers or a composition comprising the three-component third treatment agent for polyester synthetic fibers; The above-mentioned three-part second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); The above-mentioned composition containing the three-component second treatment agent for polyester-based synthetic fibers contains the three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S); The above-mentioned 3rd treatment agent of 3-dose type for polyester synthetic fiber contains the following inorganic acid compound (B); The above-mentioned composition containing the three-component third treatment agent for polyester-based synthetic fibers contains the three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S); It is characterized in that When the mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is diluted to 1% by mass in water, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0191] Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof,

[0192] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 13) A composition containing a three-part first treatment agent for polyester synthetic fibers, characterized in that: Containing the first treatment agent of the three-part type for polyester synthetic fibers as described in Appendix 12 and the following solvent (S);

[0193] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 14) A three-component second treatment agent for polyester synthetic fibers, comprising an organic phosphate compound (C), and used in combination with a three-component first treatment agent for polyester synthetic fibers or a composition comprising the three-component first treatment agent for polyester synthetic fibers, and a three-component third treatment agent for polyester synthetic fibers or a composition comprising the three-component third treatment agent for polyester synthetic fibers; The three-part first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); The above-mentioned composition containing the three-component first treatment agent for polyester-based synthetic fibers contains the three-component first treatment agent for polyester-based synthetic fibers and the following solvent (S); The above-mentioned 3rd treatment agent of the 3-dose type for polyester-based synthetic fibers contains an inorganic acid compound (B); The above-mentioned composition containing the three-component third treatment agent for polyester-based synthetic fibers contains the above-mentioned three-component third treatment agent for polyester-based synthetic fibers and the following solvent (S); It is characterized in that When the mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is diluted to 1% by mass in water, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0194] Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0195] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 15) A composition containing a three-component second treatment agent for polyester synthetic fibers, characterized in that: Containing the three-part second treatment agent for polyester synthetic fibers as described in Appendix 14 and the following solvent (S);

[0196] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 16) A three-component third treatment agent for polyester synthetic fibers, comprising an inorganic acid compound (B), and used in combination with a three-component first treatment agent for polyester synthetic fibers or a composition comprising the three-component first treatment agent for polyester synthetic fibers, and a three-component second treatment agent for polyester synthetic fibers or a composition comprising the three-component second treatment agent for polyester synthetic fibers; The three-part first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A); The above-mentioned composition containing the three-component first treatment agent for polyester-based synthetic fibers contains the three-component first treatment agent for polyester-based synthetic fibers and the following solvent (S); The above-mentioned three-part second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C); The above-mentioned composition containing the three-component second treatment agent for polyester-based synthetic fibers contains the above-mentioned three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S); It is characterized in that When the mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is diluted to 1% by mass in water, the pH at 25° C. is 5.5 or more and 8.5 or less;

[0197] The inorganic acid compound (B) is at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof; The organic phosphate compound (C) is at least one selected from organic phosphates having an alkyl group having 16 to 20 carbon atoms in the molecule, and salts thereof;

[0198] The boiling point of the solvent (S) at atmospheric pressure is 105° C. or lower. (Appendix 17) A composition containing a three-component third treatment agent for polyester synthetic fibers, characterized in that: Containing the third treatment agent of the three-part form for polyester synthetic fibers as described in Appendix 16 and the following solvent (S);

[0199] Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure. (Appendix 18) 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 6, wherein the concentration of the polyester synthetic fiber processing agent is 0.1% by mass or more and 10% by mass or less.

[0200] (Appendix 19) A method for processing polyester synthetic fibers, characterized in that: applying a diluted solution of a polyester synthetic fiber treatment agent to the polyester synthetic fiber in at least one of a spinning step, a stretching step, and a finishing step of the polyester synthetic fiber; 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 6 to water.

[0201] (Appendix 20) A method for processing polyester synthetic fibers, characterized in that: applying a diluted solution of a polyester synthetic fiber treatment agent to the polyester synthetic fiber in at least one of a spinning step, a stretching step, and a finishing step of the polyester synthetic fiber; 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 7 to water.

[0202] (Appendix 21) A method for processing polyester synthetic fibers, characterized in that: applying a diluted solution of a polyester synthetic fiber treatment agent to the polyester synthetic fiber in at least one of a spinning step, a stretching step, and a finishing step of the polyester synthetic fiber; The diluted solution of the above-mentioned polyester synthetic fiber treatment agent is obtained by adding the two-dose first treatment agent for polyester synthetic fibers described in Appendix 8 or the composition containing the two-dose first treatment agent for polyester synthetic fibers described in Appendix 9, the two-dose second treatment agent for polyester synthetic fibers described in Appendix 10 or the composition containing the two-dose second treatment agent for polyester synthetic fibers described in Appendix 11 to water.

[0203] (Appendix 22) A method for processing polyester synthetic fibers, characterized in that: applying a diluted solution of a polyester synthetic fiber treatment agent to the polyester synthetic fiber in at least one of a spinning step, a stretching step, and a finishing step of the polyester synthetic fiber; The diluted solution of the above-mentioned polyester synthetic fiber treatment agent is obtained by adding the three-dose first treatment agent for polyester synthetic fibers described in Appendix 12 or the composition containing the three-dose first treatment agent for polyester synthetic fibers described in Appendix 13, the three-dose second treatment agent for polyester synthetic fibers described in Appendix 14 or the composition containing the three-dose second treatment agent for polyester synthetic fibers described in Appendix 15, the three-dose third treatment agent for polyester synthetic fibers described in Appendix 16 or the composition containing the three-dose third treatment agent for polyester synthetic fibers described in Appendix 17 to water.

[0204] (Appendix 23) A polyester synthetic fiber, characterized in that the polyester synthetic fiber treating agent described in any one of Appendices 1 to 6 is attached to the fiber.

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 inorganic acid compound (B), and 5% by mass or more of the following organic phosphate compound (C), It is characterized in that The pH of a 1 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. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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 When the total content of the (poly)oxyalkylene derivative (A), the inorganic 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 inorganic 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.

3. The polyester synthetic fiber treating agent according to claim 1, wherein The invention is constituted to include in a set: a two-component first treatment agent for polyester-based synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), and a two-component second treatment agent for polyester-based synthetic fibers containing the above-mentioned organic phosphate compound (C), Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the inorganic acid compound (B).

4. The polyester synthetic fiber treating agent according to claim 1, wherein The composition comprises, in a group form, a first three-part treatment agent for polyester synthetic fibers containing the above-mentioned (poly)oxyalkylene derivative (A), a second three-part treatment agent for polyester synthetic fibers containing the above-mentioned organic phosphate compound (C), and a third three-part treatment agent for polyester synthetic fibers containing the above-mentioned inorganic acid compound (B).

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

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

7. A composition containing a polyester synthetic fiber treatment agent, characterized in that: The polyester synthetic fiber treating agent according to any one of claims 1 to 6 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

8. A two-component first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a two-component second treatment agent for polyester synthetic fibers or a composition comprising the two-component second treatment agent for polyester synthetic fibers, The above-mentioned two-component second treatment agent for polyester-based synthetic fibers contains the following organic phosphate compound (C), The above-mentioned composition containing the two-component second treatment agent for polyester-based synthetic fibers contains the above-mentioned two-component second treatment agent for polyester-based synthetic fibers and the following solvent (S), It is characterized in that Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the following inorganic acid compound (B), When the mixture of the two-component first treatment agent for polyester synthetic fibers and the two-component second treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, 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 two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C), and the mixture does not contain a solvent. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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.

9. A composition containing a two-part first treatment agent for polyester synthetic fibers, characterized in that: Containing the two-part first treatment agent for polyester synthetic fibers according to claim 8 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

10. A two-component second treatment agent for polyester synthetic fibers, comprising the following organic phosphate compound (C), and used in combination with a two-component first treatment agent for polyester synthetic fibers or a composition comprising the two-component first treatment agent for polyester synthetic fibers, The two-part first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A), The composition containing the two-component first treatment agent for polyester-based synthetic fibers contains the two-component first treatment agent for polyester-based synthetic fibers and the following solvent (S), It is characterized in that Either or both of the two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contain the following inorganic acid compound (B), When the mixture of the two-component first treatment agent for polyester synthetic fibers and the two-component second treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, 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 two-component first treatment agent for polyester-based synthetic fibers and the two-component second treatment agent for polyester-based synthetic fibers contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C), and the mixture does not contain a solvent. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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.

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

12. A three-component first treatment agent for polyester synthetic fibers, comprising a (poly)oxyalkylene derivative (A), and used in combination with a three-component second treatment agent for polyester synthetic fibers or a composition comprising the three-component second treatment agent for polyester synthetic fibers, and a three-component third treatment agent for polyester synthetic fibers or a composition comprising the three-component third treatment agent for polyester synthetic fibers, The three-component second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C), The above-mentioned composition containing the three-component second treatment agent for polyester-based synthetic fibers contains the three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S), The above-mentioned three-component third treatment agent for polyester-based synthetic fibers contains the following inorganic acid compound (B), The composition containing the three-component third treatment agent for polyester-based synthetic fibers contains the three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S), It is characterized in that When a mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, 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 three-component first treatment agent for polyester-based synthetic fibers, the three-component second treatment agent for polyester-based synthetic fibers, and the three-component third treatment agent for polyester-based synthetic fibers contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C), and the mixture does not contain a solvent. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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.

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

14. A three-component second treatment agent for polyester synthetic fibers, comprising an organic phosphate compound (C), and used in combination with a three-component first treatment agent for polyester synthetic fibers or a composition comprising the three-component first treatment agent for polyester synthetic fibers, and a three-component third treatment agent for polyester synthetic fibers or a composition comprising the three-component third treatment agent for polyester synthetic fibers, The three-component first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A), The above-mentioned composition containing the three-component first treatment agent for polyester-based synthetic fibers contains the three-component first treatment agent for polyester-based synthetic fibers and the following solvent (S), The above-mentioned three-part third treatment agent for polyester synthetic fibers contains an inorganic acid compound (B), The composition containing the three-component third treatment agent for polyester-based synthetic fibers contains the three-component third treatment agent for polyester-based synthetic fibers and the following solvent (S), It is characterized in that When a mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, 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 three-component first treatment agent for polyester-based synthetic fibers, the three-component second treatment agent for polyester-based synthetic fibers, and the three-component third treatment agent for polyester-based synthetic fibers contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C), and the mixture does not contain a solvent. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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.

15. A composition containing a three-component second treatment agent for polyester synthetic fibers, characterized in that: Containing the three-component second treatment agent for polyester synthetic fibers according to claim 14 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

16. A three-component third treatment agent for polyester synthetic fibers, comprising an inorganic acid compound (B), and used in combination with a three-component first treatment agent for polyester synthetic fibers or a composition comprising the three-component first treatment agent for polyester synthetic fibers, and a three-component second treatment agent for polyester synthetic fibers or a composition comprising the three-component second treatment agent for polyester synthetic fibers, The three-component first treatment agent for polyester synthetic fibers contains a (poly)oxyalkylene derivative (A), The above-mentioned composition containing the three-component first treatment agent for polyester-based synthetic fibers contains the three-component first treatment agent for polyester-based synthetic fibers and the following solvent (S), The three-component second treatment agent for polyester synthetic fibers contains the following organic phosphate compound (C), The composition containing the three-component second treatment agent for polyester-based synthetic fibers contains the three-component second treatment agent for polyester-based synthetic fibers and the following solvent (S), It is characterized in that When a mixture of the three-component first treatment agent for polyester synthetic fibers, the three-component second treatment agent for polyester synthetic fibers, and the three-component third treatment agent for polyester synthetic fibers is prepared as a 1 mass % water dilution, 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 three-component first treatment agent for polyester-based synthetic fibers, the three-component second treatment agent for polyester-based synthetic fibers, and the three-component third treatment agent for polyester-based synthetic fibers contains 5% by mass or more of the (poly)oxyalkylene derivative (A), 1% by mass or more of the inorganic acid compound (B), and 5% by mass or more of the organic phosphate compound (C), and the mixture does not contain a solvent. Inorganic acid compound (B): at least one selected from sulfuric acid, nitric acid, hydrochloric acid, and salts thereof, Organic phosphoric acid ester compound (C): at least one selected from organic phosphoric acid esters having an alkyl 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.

17. A composition containing a three-component third treatment agent for polyester synthetic fibers, characterized in that: Containing the three-component third treatment agent for polyester-based synthetic fibers according to claim 16 and the following solvent (S), Solvent (S): a solvent having a boiling point of 105° C. or less at atmospheric pressure.

18. 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 claims 1 to 6, wherein the concentration of the polyester synthetic fiber processing agent is 0.1% by mass or more and 10% by mass or less.

19. A method for treating polyester synthetic fibers, characterized in that: In at least one of the spinning step, the stretching step, and the finishing step of the polyester synthetic fiber, a diluted solution of the polyester synthetic fiber treatment agent is applied to the polyester synthetic fiber, 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 6 to water.

20. A method for treating polyester synthetic fibers, characterized in that: In at least one of the spinning step, the stretching step, and the finishing step of the polyester synthetic fiber, a diluted solution of the polyester synthetic fiber treatment agent is applied to the polyester synthetic fiber, 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 7 to water.

21. A method for treating polyester synthetic fibers, characterized in that: In at least one of the spinning step, the stretching step, and the finishing step of the polyester synthetic fiber, a diluted solution of the polyester synthetic fiber treatment agent is applied to the polyester synthetic fiber, The diluted solution of the above-mentioned polyester synthetic fiber treatment agent is obtained by adding the two-dose first treatment agent for polyester synthetic fibers described in claim 8 or the composition containing the two-dose first treatment agent for polyester synthetic fibers described in claim 9, the two-dose second treatment agent for polyester synthetic fibers described in claim 10 or the composition containing the two-dose second treatment agent for polyester synthetic fibers described in claim 11 to water.

22. A method for treating polyester synthetic fibers, characterized in that: In at least one of the spinning step, the stretching step, and the finishing step of the polyester synthetic fiber, a diluted solution of the polyester synthetic fiber treatment agent is applied to the polyester synthetic fiber, The diluted solution of the above-mentioned polyester synthetic fiber treatment agent is obtained by adding the three-dose first treatment agent for polyester synthetic fibers described in claim 12 or the composition containing the three-dose first treatment agent for polyester synthetic fibers described in claim 13, the three-dose second treatment agent for polyester synthetic fibers described in claim 14 or the composition containing the three-dose second treatment agent for polyester synthetic fibers described in claim 15, the three-dose third treatment agent for polyester synthetic fibers described in claim 16 or the composition containing the three-dose third treatment agent for polyester synthetic fibers described in claim 17 to water.

23. A polyester synthetic fiber, characterized in that: The polyester synthetic fiber treating agent according to any one of claims 1 to 6 is attached thereto.

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