Treatment agent for polyester synthetic fibers, first treatment agent for polyester synthetic fibers, second treatment agent for polyester synthetic fibers, and polyester synthetic fibers

Abstract

The present invention provides a polyester synthetic fiber treatment agent, a first treatment agent for polyester synthetic fiber, a second treatment agent for polyester synthetic fiber, and polyester synthetic fiber, which can improve the antistatic properties and cardability of fibers to which the synthetic fiber treatment agent has been applied. [Solution] The treatment agent for polyester synthetic fibers of the present invention is characterized by containing the following alkyl phosphate ester (A), nonionic surfactant (B), and nitrogen-containing potassium polycarboxylic acid salt (C): Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having from 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof.

Description

[Technical Field]

[0001] The present invention relates to a treatment agent for polyester synthetic fibers, a first treatment agent for polyester synthetic fibers, a second treatment agent for polyester synthetic fibers, and polyester synthetic fibers treated with the treatment agent for polyester synthetic fibers. [Background technology]

[0002] In general, in the spinning, drawing, finishing and other processes of synthetic fibers, a treatment is sometimes carried out to attach a synthetic fiber treating agent to the surface of the synthetic fiber in order to reduce friction and improve antistatic properties.

[0003] For example, conventionally known synthetic fiber treatment agents are disclosed in Patent Documents 1 to 3. Patent Document 1 discloses a polyester synthetic fiber treatment agent containing a (poly)oxyalkylene derivative (A), an organic acid compound (B), and an organic phosphate ester compound (C).

[0004] Patent Document 2 discloses a synthetic fiber treatment agent containing an anionic surfactant as the main component, characterized in that the treatment agent contains a chelating agent in an amount of 1 to 20% by weight based on the active ingredient of the treatment agent.

[0005] Patent Document 3 discloses a processing agent for polyester synthetic fibers, which contains 40 to 80 mass% of an alkali metal salt of an alkyl phosphate ester having an alkyl group with 12 to 22 carbon atoms in the molecule, 20 to 59.99 mass% of a specific surfactant, and 0.01 to 3.0 mass% of a specific metal phosphate salt (total 100 mass%), and is characterized in that the alkali metal salt of the alkyl phosphate ester has an acid value of 0.1 to 90 KOHmg / g. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7223470 [Patent Document 2] Japanese Patent Application Publication No. 7-157970 [Patent Document 3] Patent No. 5796922 Summary of the Invention [Problem to be solved by the invention]

[0007] However, conventional synthetic fiber treating agents have the problem that the fibers to which the agents are applied have poor antistatic properties and carding properties. [Means for solving the problem]

[0008] As a result of research aimed at solving the above-mentioned problems, the present inventors have found that the composition of a treatment agent for synthetic fibers containing the following alkyl phosphate ester (A), nonionic surfactant (B), and nitrogen-containing potassium polycarboxylic acid salt (C) is exactly suitable.

[0009] Various aspects for solving the above problems will be described. The treatment agent for polyester synthetic fibers of the first aspect comprises the following alkyl phosphate ester (A): 15% by mass or more and 85% by mass or less , nonionic surfactant (B) 5% by mass or more and 80% by mass or less , and The following Nitrogen-containing polycarboxylic acid potassium salt (C) 0.1% by mass or more and 15% by mass or less, The compound is characterized by containing:

[0010] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): A compound in which the nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid is at least one selected from the group consisting of the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid.

[0011] [ka] R 1 ,R 2 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0012] [ka] R 3 ,R 4 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0013] [ka] R 5 ,R 7 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0014] R 6 ,R 8 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. m:1 or 2.

[0015] (R 6 If there are two R 6 may be the same or different)

[0016] [ka] R 9 ,R 10 ,R 13 ,R 14 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0017] R 11 ,R 12 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. n:1 or 2.

[0018] (R 11 If there are two R 11 may be the same or different) Aspects 2 is the aspect 1In the treatment agent for polyester synthetic fibers described in the above, the mass ratio of the alkyl phosphate ester (A) to the nonionic surfactant (B) is alkyl phosphate ester (A) / nonionic surfactant (B)=20 / 80 to 80 / 20.

[0019] Aspects 3 Aspect 1 or 2 The non-volatile content of the treatment agent for polyester synthetic fibers contains the alkyl phosphate ester (A) in an amount of 20% by mass or more and 75% by mass or less, the nonionic surfactant (B) in an amount of 20% by mass or more and 75% by mass or less, and the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass or more and 5.0% by mass or less.

[0020] Aspects 4 is aspect 1~ 3 In the treating agent for polyester synthetic fibers according to any one of the above aspects, the alkyl group constituting the alkyl phosphate ester (A) has 16 to 18 carbon atoms.

[0021] Aspects 5 is aspect 1~ 4 The treating agent for polyester-based synthetic fibers according to any one of the above aspects further contains the following inorganic phosphoric acid (D). Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

[0022] Aspects 6 is the aspect 5 The non-volatile content of the treatment agent for polyester synthetic fibers contains the alkyl phosphate ester (A) in an amount of 20% by mass or more and 74.99% by mass or less, the nonionic surfactant (B) in an amount of 20% by mass or more and 74.99% by mass or less, the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass or more and 5.0% by mass or less, and the inorganic phosphoric acid (D) in an amount of more than 0% by mass and 5.0% by mass or less.

[0023] Aspects 7The first treating agent for polyester synthetic fibers is a first treating agent for polyester synthetic fibers to be used in combination with a second treating agent for polyester synthetic fibers containing a nonionic surfactant (B), and at least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers is The following It contains potassium salt of nitrogen-containing polycarboxylic acid (C), alkyl phosphate ester (A) as shown below, and optionally inorganic phosphoric acid (D) as shown below. a mixture of the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers, the mixture containing the alkyl phosphate ester (A) in an amount of 15% by mass or more and 85% by mass or less, the nonionic surfactant (B) in an amount of 5% by mass or more and 80% by mass or less, and the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.1% by mass or more and 15% by mass or less; It is characterized by:

[0024] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): A compound in which the nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid is at least one selected from the group consisting of the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid.

[0025] [ka] R 1 ,R 2 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0026] [ka] R 3 ,R 4 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0027] [ka] R 5 ,R 7 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0028] R 6 ,R 8 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. m:1 or 2.

[0029] (R 6 If there are two R 6 may be the same or different)

[0030] [ka] R 9 ,R 10 ,R 13 ,R 14 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0031] R 11 ,R 12 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. n:1 or 2.

[0032] (R 11 If there are two R 11 may be the same or different) Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof. Aspects 8 The second treating agent for polyester synthetic fibers is a second treating agent for polyester synthetic fibers that is used in combination with a first treating agent for polyester synthetic fibers containing the following alkyl phosphate ester (A) and, optionally, the following inorganic phosphoric acid (D), and at least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers The following Contains potassium salt of nitrogen-containing polycarboxylic acid (C) and nonionic surfactant (B) a mixture of the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers, the mixture containing the alkyl phosphate ester (A) in an amount of 15% by mass or more and 85% by mass or less, the nonionic surfactant (B) in an amount of 5% by mass or more and 80% by mass or less, and the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.1% by mass or more and 15% by mass or less; It is characterized by:

[0033] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): A compound in which the nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid is at least one selected from the group consisting of the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid.

[0034]

change

[0035]

change

[0036]

change

[0037] R 6 ,R 8 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. m:1 or 2.

[0038] (R 6 If there are two R 6 may be the same or different)

[0039]

change

[0040] R 11 ,R 12 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. n:1 or 2.

[0041] (R 11 If there are two R 11 may be the same or different) Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof. Aspects 9 The polyester synthetic fiber is 6 1. A polyester-based synthetic fiber treatment agent according to any one of the above aspects is attached to the surface of the polyester-based synthetic fiber. [Effects of the Invention]

[0042] According to the present invention, the antistatic properties and carding properties of fibers to which a treatment agent for polyester synthetic fibers has been applied can be improved. DETAILED DESCRIPTION OF THE INVENTION

[0043] First Embodiment A first embodiment of the treatment agent for polyester synthetic fibers (hereinafter simply referred to as the treatment agent) of the present invention will be described below. The treatment agent of this embodiment contains the following alkyl phosphate ester (A), nonionic surfactant (B), and nitrogen-containing potassium polycarboxylic acid salt (C). The treatment agent may further contain a predetermined inorganic phosphoric acid (D).

[0044] (Alkyl phosphate ester (A)) The alkyl phosphate ester (A) is at least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule and alkali metal salts thereof. The alkyl group may be a straight chain or a branched chain.

[0045] As mentioned above, the alkyl group has 16 to 22 carbon atoms. Specific examples of the alkyl group include hexadecyl, heptadecyl, octadecyl, icosyl, docosyl, isohexadecyl, isoheptadecyl, isooctadecyl, isoicosyl, and isodocosyl groups. Among these, compounds having an alkyl group having 16 to 18 carbon atoms are preferred. Use of such compounds can further improve the smoothness of fibers, particularly those to which a treatment agent has been applied.

[0046] The phosphoric acid constituting the alkyl phosphate ester is not particularly limited, and may be orthophosphoric acid or a polyphosphoric acid such as diphosphoric acid. Specific examples of the alkali metal constituting the alkali metal salt include sodium, potassium, and lithium.

[0047] The acid value of the alkyl phosphate ester (A) is not particularly limited, but is preferably from 0.1 mgKOH / g to 80 mgKOH / g, more preferably from 5 mgKOH / g to 60 mgKOH / g.

[0048] The acid value (KOH mg / g) of the treatment agent is expressed by the following formula. A sample solution was prepared by dissolving the alkyl phosphate ester (A) in ion-exchanged water. The prepared sample solution was placed in a known potentiometer and titrated with a 0.1 mol / L potassium hydroxide methanol standard solution. The acid value of the treatment agent was calculated using the following formula:

[0049] Acid value (KOH-mg / g)=(R×f×56.11×0.1) / S In the formula, f: Factor of 0.1 mol / L potassium hydroxide methanol standard solution S: Sample amount (g, equivalent to non-volatile matter) R: Amount (mL) of 0.1 mol / L potassium hydroxide methanol standard solution used to reach the inflection point The non-volatile content is determined from the mass of the bone-dry substance obtained by heat-treating the object at 105°C for 2 hours to thoroughly remove volatile substances (the same applies hereinafter).

[0050] Specific examples of the alkyl phosphate (A) include stearyl phosphate potassium salt, cetyl phosphate potassium salt, eicosyl phosphate potassium salt, and behenyl phosphate potassium salt.

[0051] These alkyl phosphate esters (A) may be used singly or in appropriate combination of two or more. The lower limit of the content of the alkyl phosphate ester (A) in the treatment agent is set as appropriate, but is preferably 15% by mass or more, more preferably 20% by mass or more. When the content is 15% by mass or more, the cardability of the fiber to which the treatment agent is applied can be particularly improved. The upper limit of the content of the alkyl phosphate ester (A) is set as appropriate, but is preferably 85% by mass or less, more preferably 75% by mass or less. When the content is 85% by mass or less, the cardability of the fiber to which the treatment agent is applied can be particularly improved. Note that ranges that combine the above upper and lower limits are also envisioned. In the present invention, the content of the alkyl phosphate ester (A) in the treatment agent is 15% by mass or more and 85% by mass or less.

[0052] (Nonionic surfactant (B)) Examples of the nonionic surfactant (B) include compounds having a (poly)oxyalkylene structure in which alkylene oxide is added to alcohols or carboxylic acids, ether / ester compounds having a (poly)oxyalkylene structure in which alkylene oxide is added to an ester compound of carboxylic acids and polyhydric alcohols, amine compounds such as compounds having a (poly)oxyalkylene structure in which alkylene oxide is added to a primary organic amine, partial ester compounds of carboxylic acids and polyhydric alcohols, amide compounds obtained by condensing amine compounds and carboxylic acids, compounds having a (poly)oxyalkylene structure in which alkylene oxide is added to fatty acid amides, and compounds having a polyoxyalkylene structure such as block copolymers having a polyoxyethylene chain, a polyoxyethylene chain, and a polyoxypropylene chain.

[0053] Specific examples of alcohols used as raw materials for the nonionic surfactant (B) include: (1) linear alkyl alcohols 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, isobutanol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isopentadecanol, and isohexanol; Branched alkyl alcohols such as sadecanol, isoheptadecanol, isooctadecanol, isonodecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexacosanol, isoheptacosanol, isooctacosanol, isononacosanol, and isotriacontanol; (3) linear alkenyl alcohols such as tetradecenol, hexadecenol, heptadecenol, octadecenol, and nonadecenol; (4) branched alkenyl alcohols such as isohexadecenol and isooctadecenol; (5) cyclic alkyl alcohols such as cyclopentanol and cyclohexanol; and (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol, and tristyrenated phenol.

[0054] Specific examples of carboxylic acids used as raw materials for the nonionic surfactant (B) include: (1) linear alkyl carboxylic acids such as octylic 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 alkyl carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) linear alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, and octadecatrienoic acid; (4) aromatic carboxylic acids such as benzoic acid; (5) hydroxycarboxylic acids such as lactic acid, citric acid, and ricinoleic acid; and (6) polycarboxylic acids such as adipic acid, sebacic acid, and tricarbaryl.

[0055] The alkylene oxide used as a raw material for forming the (poly)oxyalkylene structure of the nonionic surfactant (B) is preferably an alkylene oxide having 2 to 4 carbon atoms. Specific examples of alkylene oxide include ethylene oxide, propylene oxide, and butylene oxide. The number of moles of alkylene oxide added is appropriately set, but is preferably 0.1 to 60 moles, more preferably 1 to 40 moles, and even more preferably 2 to 30 moles. Any combination of the above upper and lower limits is also possible. The number of moles of alkylene oxide added refers to the number of moles of alkylene oxide per mole of the compound to be added in the raw material. One type of alkylene oxide may be used alone, or two or more types of alkylene oxides may be used in appropriate combination. When two or more types of alkylene oxides are used, the addition form may be any of block addition, random addition, and a combination of block addition and random addition, and is not particularly limited.

[0056] Specific examples of polyhydric alcohols used as raw materials for the nonionic surfactant (B) 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, glycerin, 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, and sorbitol.

[0057] Specific examples of the aliphatic amine used as a raw material for the nonionic surfactant (B) include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine, octadecenylamine, and coconut amine.

[0058] Specific examples of fatty acid amides used as raw materials for the nonionic surfactant (B) include octylic acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, behenic acid amide, lignoceric acid amide, amides of fatty acids and diethanolamine, and amides of fatty acids and ethyleneamine.

[0059] The compound having a polyoxyalkylene structure is not particularly limited as long as it has a surfactant effect. The number of polyoxyethylene chains and / or polyoxypropylene chains in the molecule is not particularly limited. The number of moles of ethylene oxide added to form the polyoxyethylene chain is not particularly limited, and may be, for example, 3 to 200 moles. The number of moles of propylene oxide added to form the polyoxypropylene chain is not particularly limited, and may be, for example, 3 to 100 moles.

[0060] Specific examples of the nonionic surfactant (B) include a compound in which an alkylene oxide is added to laurylamine, a compound in which an alkylene oxide is added to decyl alcohol, a compound in which an alkylene oxide is added to lauryl alcohol, a compound in which an alkylene oxide is added to sorbitan monostearate, a compound in which an alkylene oxide is added to stearylamine, a compound in which 25 moles of ethylene oxide are added to 1 mole of polyethylene glycol or propylene glycol, and then 25 moles of propylene oxide are added, and a compound in which an alkylene oxide is added to nonylphenol.

[0061] These nonionic surfactants (B) may be used singly or in appropriate combination of two or more. The lower limit of the content of the nonionic surfactant (B) in the treatment agent is set as appropriate, but is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more. When the content is 5% by mass or more, the cardability of the fibers to which the treatment agent has been applied can be particularly improved. The upper limit of the content of the nonionic surfactant (B) is set as appropriate, but is preferably 80% by mass or less, more preferably 75% by mass or less. When the content is 80% by mass or less, the cardability of the fibers to which the treatment agent has been applied can be particularly improved. Note that ranges that combine the above upper and lower limits are also envisioned. In the present invention, the content of the nonionic surfactant (B) in the treatment agent is 5% by mass or more and 80% by mass or less.

[0062] The mass ratio of the alkyl phosphate ester (A) to the nonionic surfactant (B) in the treatment agent is set appropriately, but it is preferable that the alkyl phosphate ester (A) / nonionic surfactant (B) be 20 / 80 to 80 / 20. By specifying the ratio within this range, cardability can be further improved.

[0063] (Potassium salt of nitrogen-containing polycarboxylic acid (C)) The number of nitrogen atoms in one molecule of the nitrogen-containing potassium polycarboxylic acid salt (C) is not particularly limited, but is preferably 1 or more and 3 or less. The nitrogen-containing potassium polycarboxylic acid salt (C) may be acyclic or may have a cyclic structure such as a cyclocyclic structure, but is preferably an acyclic compound. The nitrogen-containing potassium polycarboxylic acid salt (C) is more preferably a compound having 1 or more and 3 or less nitrogen atoms in one molecule and being acyclic. The use of such a compound can further improve antistatic properties. Examples of nitrogen-containing polycarboxylic acids constituting the nitrogen-containing potassium polycarboxylic acid salt (C) include aminopolycarboxylic acids and iminopolycarboxylic acids.

[0064] Specific examples of the acyclic nitrogen-containing potassium polycarboxylic acid salt (C) having 1 to 3 nitrogen atoms in one molecule include those represented by the following general formulas (1) to (4).

[0065] [ka] R 1 ,R 2 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0066] [ka] R 3 ,R 4 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0067] [ka] R 5 ,R 7 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0068] R 6 ,R 8: Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. m:1 or 2.

[0069] (R 6 If there are two R 6 may be the same or different)

[0070] [ka] R 9 ,R 10 ,R 13 ,R 14 : Each independently is a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms.

[0071] R 11 ,R 12 : Each independently represents a hydrogen atom, or a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. n:1 or 2.

[0072] (R 11 If there are two R 11 may be the same or different) Specific examples of the nitrogen-containing potassium polycarboxylic acid salt (C) include potassium salts of ethylenediaminetetraacetic acid (EDTA, edetic acid), hydroxyethylethylenediaminetriacetic acid (HEDTA), dihydroxyethylethylenediaminediacetic acid (DHEDDA), 1,3-propanediaminetetraacetic acid (1,3PDTA), diethylenetriaminepentaacetic acid (DTPA), triethylenetetraminehexaacetic acid (TTHA), nitrilotriacetic acid (NTA), iminodiacetic acid, hydroxyethyliminodiacetic acid (HIMDA), glutamic acid, glutamic acid diacetic acid, aspartic acid, aspartic acid diacetic acid (ASDA), ethylenediaminedisuccinic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, 1,2-cyclohexanediaminetetraacetic acid, glycol ether diaminetetraacetic acid, and the like.

[0073] In the present invention, at least one compound selected from the group consisting of the compounds represented by the above general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid is used.

[0074] These nitrogen-containing potassium polycarboxylic acid salts (C) may be used singly or in appropriate combination of two or more. The lower limit of the content of the nitrogen-containing potassium polycarboxylic acid salt (C) in the treatment agent is set as appropriate, but is preferably 0.1% by mass or more, more preferably 0.2% by mass or more. When the content is 0.1% by mass or more, the cardability and antistatic properties of the fiber to which the treatment agent is applied can be particularly improved. The upper limit of the content of the nitrogen-containing potassium polycarboxylic acid salt (C) can be set as appropriate, but is preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. When the content is 15% by mass or less, the cardability of the fiber to which the treatment agent is applied can be particularly improved. Note that ranges that combine the above upper and lower limits are also contemplated. In the present invention, the content of the nitrogen-containing potassium polycarboxylic acid salt (C) in the treatment agent is 0.1% by mass or more and 15% by mass or less.

[0075] The nonvolatile content of the treatment agent preferably contains the alkyl phosphate ester (A) in an amount of 20% by mass to 75% by mass, the nonionic surfactant (B) in an amount of 20% by mass to 75% by mass, and the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass to 5.0% by mass. Any combination of the upper and lower limits is also contemplated. By specifying the content ratio of each component within this range, the effects of the present invention can be further improved.

[0076] (Inorganic Phosphate (D)) The treating agent may further contain the following inorganic phosphoric acid (D) in order to further improve the antistatic properties of the fiber to which the treating agent is applied. The inorganic phosphoric acid (D) is at least one selected from inorganic phosphoric acid and its metal salts.

[0077] The inorganic phosphoric acid may be orthophosphoric acid or a polyphosphoric acid such as diphosphoric acid. Examples of the metal salt include alkali metal salts and alkaline earth metal salts. Specific examples of alkali metals constituting alkali metal salts include sodium, potassium, and lithium. Examples of alkaline earth metals constituting alkaline earth metal salts include metals belonging to Group 2 elements, such as calcium, magnesium, beryllium, strontium, and barium. Specific examples of inorganic phosphoric acid (D) include dipotassium hydrogen phosphate and tripotassium phosphate.

[0078] These inorganic phosphoric acids (D) may be used singly or in suitable combination of two or more. The lower limit of the content of inorganic phosphoric acid (D) in the treatment agent is set as appropriate, but is preferably greater than 0% by mass, preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. When this content exceeds 0% by mass, the antistatic properties of the fibers to which the treatment agent is applied can be further improved. The upper limit of the content of inorganic phosphoric acid (D) can be set as appropriate, but is preferably 10% by mass or less, more preferably 5% by mass or less. When this content is 10% by mass or less, the scum accumulation tendency of the fibers to which the treatment agent is applied after passing through each device can be improved. Note that ranges that combine the above upper and lower limits in any way are also contemplated.

[0079] The nonvolatile content of the treatment agent preferably contains the alkyl phosphate ester (A) in an amount of 20% by mass to 74.99% by mass, the nonionic surfactant (B) in an amount of 20% by mass to 74.99% by mass, the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass to 5.0% by mass, and the inorganic phosphoric acid (D) in an amount of more than 0% by mass to 5.0% by mass. Any combination of the above upper and lower limits is also contemplated. By specifying the content ratio of each component within this range, the effects of the present invention can be further improved.

[0080] (Preservation form) The treatment agent may be formulated as a single-component agent containing the alkyl phosphate ester (A), nonionic surfactant (B), nitrogen-containing potassium polycarboxylic acid salt (C), and inorganic phosphoric acid (D) described above. Alternatively, from the viewpoint of improving formulation stability, the treatment agent may be formulated as a two-component agent as shown below.

[0081] The two-component treatment agent is configured as a set containing a first treatment agent for polyester synthetic fibers (hereinafter referred to as "first treatment agent") containing an alkyl phosphate ester (A) and, optionally, inorganic phosphoric acid (D), and a second treatment agent for polyester synthetic fibers (hereinafter referred to as "second treatment agent") containing a nonionic surfactant (B). The nitrogen-containing potassium polycarboxylic acid salt (C) is contained in at least one selected from the first treatment agent and the second treatment agent.

[0082] A two-component treatment agent is composed of a first treatment agent and a second treatment agent that is composed as a separate agent from the first treatment agent during storage or distribution, etc. When used, the two-component treatment agent is prepared by mixing the first treatment agent and the second treatment agent.

[0083] (solvent) The treatment agent of this embodiment may be blended with a solvent as needed to prepare a treatment-containing composition or a diluted solution of the treatment agent. Examples of the solvent include water and organic solvents. Specific examples of organic solvents include lower alcohols such as ethanol and propanol, and low-polarity solvents such as hexane and normal paraffin. These solvents may be used alone or in combination of two or more. Among these, water is preferred from the viewpoints of excellent dispersibility or solubility of each component and excellent handling.

[0084] (Effects of the first embodiment) The effects of the treatment agent of the first embodiment will be described. (1-1) The treatment agent of the first embodiment is configured to contain an alkyl phosphate ester (A) containing at least one selected from alkyl phosphate esters having an alkyl group with 16 to 22 carbon atoms in the molecule and alkali metal salts thereof, a nonionic surfactant (B), and a nitrogen-containing potassium polycarboxylic acid salt (C). Therefore, the antistatic properties and carding properties of synthetic fibers to which the treatment agent is applied can be improved. Furthermore, the smoothness of the synthetic fibers can be improved, and scum accumulation after passing through various equipment can be reduced.

[0085] Second Embodiment Next, a second embodiment of the first treatment agent of the present invention will be described, focusing on the differences from the above embodiment.

[0086] The first treatment agent of this embodiment contains the alkyl phosphate ester (A) and, optionally, the inorganic phosphoric acid (D). When used, the first treatment agent is used in combination with a second treatment agent containing the nonionic surfactant (B). At least one selected from the first treatment agent and the second treatment agent contains the nitrogen-containing potassium polycarboxylic acid salt (C). When used, the first treatment agent and the second treatment agent are mixed to prepare a mixture as a treatment agent.

[0087] The alkyl phosphate ester (A), the nonionic surfactant (B), the nitrogen-containing potassium polycarboxylic acid salt (C), and the inorganic phosphoric acid (D) are the same as the components described in the first embodiment.

[0088] The contents of the alkyl phosphate ester (A), nonionic surfactant (B), nitrogen-containing potassium polycarboxylic acid salt (C), and inorganic phosphoric acid (D) in the treatment agent are also the same as those described in the first embodiment.

[0089] The first treatment agent may be blended with the solvent described in the first embodiment to form a first treatment agent-containing composition or a diluted first treatment agent solution. (Effects of the second embodiment) The following describes the effects of the first treatment agent of the second embodiment: In addition to the effects of the above-described embodiments, the second embodiment has the following effects.

[0090] (2-1) The first treatment agent of the second embodiment contains an alkyl phosphate ester (A) and, optionally, inorganic phosphoric acid (D), and is used in combination with a second treatment agent containing a nonionic surfactant (B). This improves the formulation stability, particularly storage stability, of the first treatment agent. Furthermore, by adjusting the mixing ratio with the second treatment agent, the components of the resulting treatment agent can be adjusted. Furthermore, the first treatment agent can be distributed separately from the second treatment agent.

[0091] <Third embodiment> Next, a third embodiment of the second treatment agent of the present invention will be described, focusing on the differences from the above embodiment.

[0092] The second treatment agent of this embodiment contains the nonionic surfactant (B). When used, the second treatment agent is used in combination with a first treatment agent containing the alkyl phosphate ester (A) and, optionally, the inorganic phosphoric acid (D). At least one selected from the first treatment agent and the second treatment agent contains the nitrogen-containing potassium polycarboxylic acid salt (C). When used, the first treatment agent and the second treatment agent are mixed to prepare a mixture as a treatment agent.

[0093] The alkyl phosphate ester (A), the nonionic surfactant (B), the nitrogen-containing potassium polycarboxylic acid salt (C), and the inorganic phosphoric acid (D) are the same as the components described in the first embodiment.

[0094] The contents of the alkyl phosphate ester (A), nonionic surfactant (B), nitrogen-containing potassium polycarboxylic acid salt (C), and inorganic phosphoric acid (D) in the treatment agent are also the same as those described in the first embodiment.

[0095] The second treatment agent may be blended with the solvent described in the first embodiment to form a second treatment agent-containing composition or a diluted second treatment agent solution. (Effects of the third embodiment) The following describes the effects of the second treatment agent of the third embodiment. In addition to the effects of the above-described embodiments, the third embodiment has the following effects.

[0096] (3-1) The second treatment agent of the third embodiment contains a nonionic surfactant (B) and is used in combination with a first treatment agent containing an alkyl phosphate ester (A) and, optionally, inorganic phosphoric acid (D). This improves the formulation stability, particularly storage stability, of the second treatment agent. Furthermore, by adjusting the mixing ratio with the first treatment agent, the components of the resulting treatment agent can be adjusted. Furthermore, the second treatment agent can be distributed separately from the first treatment agent.

[0097] <Fourth embodiment> Next, a fourth embodiment of the polyester synthetic fiber (hereinafter referred to as "synthetic fiber") of the present invention will be described.

[0098] The synthetic fiber of this embodiment is coated with the treatment agent of the first embodiment. In the method for producing synthetic fiber of this embodiment, in the case of a one-component treatment agent, a dilution containing a solvent and the treatment agent of the first embodiment is applied to the polyester synthetic fiber. The dilution can be prepared, for example, by adding the treatment agent or treatment agent-containing composition of the first embodiment to a solvent. The dilution is preferably prepared by adding the treatment agent of the first embodiment to water.

[0099] In the case of a two-component treatment agent, a diluted solution of the treatment agent containing a solvent, the first treatment agent of the second embodiment, and the second treatment agent of the third embodiment is applied to polyester synthetic fibers. The ratio of the content of the first treatment agent to the second treatment agent, in terms of the mass ratio of nonvolatile components, is preferably 95 / 5 to 5 / 95. By specifying the ratio within this range, operability can be improved.

[0100] Examples of the solvent used to prepare the diluted solution include those exemplified in the first embodiment. From the viewpoint of operability, the diluted solution preferably has a treatment agent concentration of 0.1% by mass or more and 10% by mass or less.

[0101] When the first and second treatment agents are used in combination, the mixing ratio of each agent can be changed as desired, making it easy to fine-tune the mixing ratio and prepare treatment agents or dilutions that always provide optimal fiber properties or fiber production characteristics, even under different production conditions, such as different production facilities or different climates (temperature, humidity, etc.).

[0102] The method for treating synthetic fibers is a method in which the diluted solution obtained as described above is applied to synthetic fibers in at least one of the steps of spinning, drawing, and finishing polyester synthetic fibers, for example.

[0103] Examples of synthetic fibers to which the treatment agent is applied include polyester synthetic fibers, such as polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins.

[0104] The uses of synthetic fibers are not particularly limited, and examples include those for spinning, spun yarn production, staple fibers, filaments, nonwoven fabrics, and wadding. Staple fibers are generally called staple fibers, and do not include filaments, which are generally called filaments. The length of staple fibers is not particularly limited as long as they fall within the scope of staple fibers in this technical field, but is, for example, 100 mm or less. Of these, the treatment agent of the present invention is preferably applied to polyester staple fibers and polyester-based synthetic fibers for spun yarn production.

[0105] There are no particular restrictions on the proportion of the diluent applied to the synthetic fibers, but the diluent is applied so that the final non-volatile content is preferably 0.01% by mass to 10% by mass, more preferably 0.1% by mass to 3% by mass. This configuration allows the efficacy of each component to be effectively exerted. There are also no particular restrictions on the method for applying the diluent, and known methods can be used depending on the type, shape, and application of the synthetic fibers, such as roller oiling, guide oiling using a metering pump, immersion oiling, and spray oiling. When the immersion oiling method is used, the immersion time is preferably 1 minute to 5 minutes.

[0106] The synthetic fibers to which the dilution liquid has been applied may be dried or heat-treated using a known method, which volatilizes the solvent such as water, leaving synthetic fibers to which the treatment agent, or the components contained in the first treatment agent and the second treatment agent, are attached.

[0107] (Effects of the fourth embodiment) The effects of the synthetic fiber of the fourth embodiment will be described below. In addition to the effects of the above embodiments, the fourth embodiment has the following effects.

[0108] (4-1) The synthetic fibers of the fourth embodiment are coated with the treatment agent of the first embodiment. This improves the antistatic properties of the synthetic fibers and improves carding properties. Furthermore, the smoothness of the synthetic fibers can be improved, and scum accumulation after passing through various devices can be reduced.

[0109] Furthermore, in the case of multi-component formulations, the first and second treatment agents are prepared by adding them to a solvent immediately before use, allowing the treatment agents to be applied to fibers in a state of good emulsion stability, thereby enabling each component to effectively exert its efficacy for spinning, spun yarn production, staple fiber, filament fiber, nonwoven fabric, wadding, etc.

[0110] (Example of change) The above embodiment may be modified as follows: The above embodiment and the following modifications may be combined with each other within the scope of technical compatibility.

[0111] Each of the treatment agents, treatment agent-containing compositions, and dilutions of the above embodiments may further contain other components commonly used in treatment agents, such as other solvents, stabilizers, antistatic agents, binders, antioxidants, UV absorbers, organic acids, and surfactants other than those mentioned above, to maintain the quality of each treatment agent, as long as the effects of the present invention are not impaired. From the perspective of efficiently demonstrating the efficacy of the present invention, the amount of other components commonly used in treatment agents other than solvents is preferably 40% by weight or less, and more preferably 10% by weight or less, of each treatment agent. Furthermore, these other components may be stored separately from the treatment agents described above. [Example]

[0112] Examples will be given below to more specifically illustrate the configuration and effects of the present invention, but the present invention is not limited to these examples. In the following examples and comparative examples, parts means parts by mass, and % means % by mass.

[0113] Test Category 1 (Preparation of Treatment Agent) (Example 1-1) As shown in Example 1-1 of Table 1, the alkyl phosphate ester (A) was 40 parts (%) of stearyl phosphate ester potassium salt (acid value 5 mgKOH / g) (A-1a), the nonionic surfactant (B) was 27.9 parts (%) of a compound (B-1) obtained by adding 15 moles of ethylene oxide to 1 mole of laurylamine, 18.6 parts (%) of a compound (B-2) obtained by adding 4 moles of ethylene oxide to 1 mole of decyl alcohol and then adding 3 moles of propylene oxide, and the nonionic surfactant (B) was 18.6 parts (%) of a compound (B-3) obtained by adding 6 moles of ethylene oxide to 1 mole of lauryl alcohol and then adding 3 moles of propylene oxide. The treatment agent of Example 1-1 was prepared containing 3.4 parts (%) of a compound (B-3) in which 2 moles of pyrene oxide were randomly added, 5.9 parts of a compound (B-4) in which 9 moles of ethylene oxide were added to 1 mole of lauryl alcohol, 0.9 parts (%) of tetrapotassium ethylenediaminetetraacetate (C-1) as the potassium salt of nitrogen-containing polycarboxylic acid (C), 0.6 parts (%) of dipotassium hydrogen phosphate (D-1) as the inorganic phosphoric acid (D), 0.7 parts (%) of potassium oleate (F-1) and 2.0 parts (%) of ethylene glycol (F-2) as other components (F).

[0114] (Examples 1-2 to 1-26, Comparative Examples 1 to 9) The treating agents of Examples 1-2 to 1-26 and Comparative Examples 1 to 9 were prepared using the components shown in Table 1 in the same manner as in Example 1-1.

[0115] The type and content of alkyl phosphate ester (A), the type and content of nonionic surfactant (B), the type and content of nitrogen-containing potassium polycarboxylic acid salt (C), the type and content of inorganic phosphoric acid (D), and the type and content of other components (F) in each example treatment agent are shown in the "Alkyl phosphate ester (A)" column, the "Nonionic surfactant (B)" column, the "Nitrogen-containing potassium polycarboxylic acid salt (C)" column, the "Inorganic phosphoric acid (D)" column, and the "Other components (F)" column in Table 1, respectively.

[0116] [Table 1] Details of the alkyl phosphate ester (A), nonionic surfactant (B), potassium salt of nitrogen-containing polycarboxylic acid (C), inorganic phosphoric acid (D), and other components (F) listed in Table 1 are as follows:

[0117] <Alkyl phosphate ester salt (A)> A-1a: Potassium stearyl phosphate (acid value 5 mg KOH / g) A-1b: Potassium stearyl phosphate (acid value 10 mg KOH / g) A-1c: Potassium stearyl phosphate (acid value 2.5 mg KOH / g) A-1d: Potassium stearyl phosphate (acid value 90 mg KOH / g) A-2: Cetyl phosphate potassium salt (acid value 15mgKOH / g) A-3: Potassium eicosyl phosphate (acid value 10mgKOH / g) A-4: Potassium behenyl phosphate (acid value 15 mg KOH / g) ra-1: Potassium octyl phosphate (acid value 10 mg KOH / g) ra-2a: Potassium lauryl phosphate (acid value 10 mg KOH / g) ra-2b: Potassium lauryl phosphate (acid value 0 mg KOH / g) <Nonionic surfactant (B)> B-1: A compound obtained by adding 15 moles of ethylene oxide to 1 mole of laurylamine B-2: A compound obtained by adding 4 moles of ethylene oxide to 1 mole of decyl alcohol, followed by the addition of 3 moles of propylene oxide. B-3: A compound in which 6 moles of ethylene oxide and 2 moles of propylene oxide are randomly added to 1 mole of lauryl alcohol. B-4: A compound obtained by adding 9 moles of ethylene oxide to 1 mole of lauryl alcohol B-5: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of lauryl alcohol B-6: A compound obtained by adding 9 moles of ethylene oxide to 1 mole of lauryl alcohol B-7: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of laurylamine B-8: A compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitan monostearate B-9: A compound obtained by adding 1 mole of ethylene oxide to 1 mole of stearylamine, and then adding 5 moles of propylene oxide. B-10: Polyethylene glycol (mass average molecular weight 220) B-11: A compound obtained by adding 25 moles of ethylene oxide to 1 mole of propylene glycol, and then adding 25 moles of propylene oxide. B-12: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of nonylphenol <Potassium salt of nitrogen-containing polycarboxylic acid (C)> C-1: tetrapotassium ethylenediaminetetraacetate C-2: Dipotassium ethylenediaminetetraacetate C-3: Diethylenetriaminepentaacetic acid pentapotassium C-4: Tripotassium ethylenediamine disuccinate C-5: Dipotassium iminodiacetate C-6: Monopotassium glutamate C-7: tetrapotassium 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate C-8: Dipotassium 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate rc-1: Disodium ethylenediaminetetraacetic acid rc-2: Trisodium ethylenediamine disuccinate <Inorganic Phosphate (D)> D-1: Dipotassium hydrogen phosphate D-2: Tripotassium phosphate (Other ingredients) F-1: Potassium oleate F-2: Ethylene glycol F-3: Dimethyl silicone F-4: Succinic acid F-5: Sodium lauryl sulfate F-6: Propylene glycol Test Category 2 (Adhesion of treatment agent to polyester fiber) Each treatment agent prepared in Test Section 1 was diluted with ion-exchanged water to prepare a 0.15% diluted solution of the treatment agent. -4 The oil was sprayed onto polyester fibers with a fiber length of 38 mm at a coating weight of 0.15 g / m. The fibers were then dried in a hot air dryer at 80°C for 2 hours and conditioned overnight in an atmosphere of 25°C and 40% RH to obtain polyester fibers coated with the treatment agent.

[0118] Test Category 3 (Antistatic Evaluation) 20 g of polyester fiber obtained in Test Section 2 was used to make miniature cards in an atmosphere of 25°C and 40% RH. The static electricity of the spun carded web was measured from a position 1 cm away from the carded web using a digital electrostatic potential meter, and the antistatic properties were evaluated according to the following criteria. The results are shown in the "Antistatic Properties" column in Table 1.

[0119] Evaluation criteria for anti-static properties 5 (Very good): Static electricity generation is less than 0.1 kV 4 (Excellent): Static electricity generation is 0.1 kV or more and less than 0.2 kV 3 (Good): Static electricity generation is between 0.2kV and 0.3kV 2 (Acceptable): Static electricity generation is 0.3 kV or more but less than 0.6 kV 1 (Not allowed): Static electricity generated is 0.6 kV or more Test Category 4 (Evaluation of scum accumulation) 3 kg of the polyester fiber obtained in Test Section 2 was subjected to a flat card to obtain a carded sliver. The obtained carded sliver was subjected to a drawing frame in an atmosphere of 25°C and 65% RH, and passed through five times at a spinning speed of 250 m / min. The degree of scum in each part of the trumpet of the drawing frame was visually evaluated according to the following criteria. The results are shown in the "Scum Accumulation" column of Table 1.

[0120] Evaluation criteria for scum accumulation 3 (Good): Scum covers less than 5% of the trumpet's surface area 2 (Acceptable): Scum is 5% or more but less than 10% of the surface area of ​​the trumpet 1 (Not acceptable): Scum covers more than 10% of the surface area of ​​the trumpet Test Category 5 (Smoothness Evaluation) 10 kg of the polyester fiber obtained in Test Section 2 was passed through a flat card (manufactured by Howa Kogyo Co., Ltd.) in an atmosphere of 25°C and 40% RH to obtain a carded sliver. The obtained carded sliver was examined using a scanning electron microscope (manufactured by JEOL Ltd.). Ten or more polyester fibers constituting the carded sliver were examined, and smoothness was evaluated based on the number of friction damages on the fiber surface according to the following criteria. The results are shown in the "Smoothness" column in Table 1.

[0121] ·Smoothness evaluation criteria 3 (Good): Fewer than two scratches on the fiber surface on average per fiber 2 (Acceptable): The average number of scratches on the fiber surface is between 2 and 3 per fiber. 1 (Unacceptable): There are an average of 3 or more scratches on the fiber surface per fiber. Test Category 6 (Cardiness Evaluation) 20 g of polyester fiber with each treatment agent prepared in Test Section 2 was conditioned for 24 hours in a thermostatic chamber at 20°C and 65% RH, and then subjected to a miniature carding machine. The ratio of the discharged amount to the input amount was calculated as the carding rate (%) using the following formula (1), and the carding properties were evaluated according to the following criteria. The results are shown in the "Carding properties" column in Table 1.

[0122]

number

[0123] Test Section 7 (Preparation of a composition containing the first treatment agent of a two-component treatment agent) (First Treatment Agent-Containing Compositions (I-1) to (I-26)) Each component was weighed out so as to obtain the content ratio shown in Table 2, and then stirred and mixed to prepare first treatment agent-containing compositions (I-1) to (I-26).

[0124] The type and content of alkyl phosphate ester (A), the type and content of nitrogen-containing potassium polycarboxylic acid salt (C), the type and content of inorganic phosphoric acid (D), the type and content of other component (F), and the content of water as a solvent in the first treatment agent-containing compositions (I-1) to (I-26) are as shown in the "Alkyl phosphate ester (A)" column, the "Nitrogen-containing potassium polycarboxylic acid salt (C)" column, the "Inorganic phosphoric acid (D)" column, the "Other component (F)" column, and the "Solvent" column in Table 2, respectively.

[0125] [Table 2] Test Section 8 (Preparation of a composition containing the second treatment agent of a two-component treatment agent) Each component was weighed out so as to obtain the content ratio shown in Table 3, and then stirred and mixed to prepare second treatment agent-containing compositions (II-1) to (II-26).

[0126] The type and content of the nonionic surfactant (B), the type and content of the nitrogen-containing potassium salt of a polycarboxylic acid (C), the type and content of the other component (F), and the content of water as a solvent in the second treatment agent-containing compositions (II-1) to (II-26) are as shown in the "Nonionic surfactant (B)" column, the "Nitrogen-containing potassium salt of a polycarboxylic acid (C)" column, the "Other components (F)" column, and the "Solvent" column in Table 3, respectively.

[0127] [Table 3] Test Section 9 (Evaluation of formulation stability of first treatment agent-containing composition and second treatment agent-containing composition) 10 mL of each of the prepared first treatment agent-containing compositions and second treatment agent-containing compositions was placed in a test tube, and the stability was visually observed and evaluated according to the following criteria. The results are shown in the "Formulation stability" column of Tables 2 and 3.

[0128] -Evaluation criteria for formulation stability 2 (Acceptable): If there is no separation or precipitate immediately after preparation 1 (Not acceptable): If separation or precipitation is observed immediately after preparation Test Section 10 (Preparation of Treatment Agent-Containing Composition and Treatment Agent Dilution from First Treatment Agent-Containing Composition and Second Treatment Agent-Containing Composition) Example 2-1 A treatment-containing composition was obtained by mixing 64% (parts) of the first treatment-containing composition (I-1) shown in Table 2 and 36% (parts) of the second treatment-containing composition (II-1) shown in Table 3, and ion-exchanged water was further added to prepare a diluted solution of 0.15% treatment agent of Example 2-1.

[0129] (Examples 2-2 to 2-26) In the same manner as in Example 2-1, a diluted solution of the treatment agent for each example was prepared by mixing the first treatment agent-containing composition shown in Table 2, the second treatment agent-containing composition shown in Table 3, and ion-exchanged water.

[0130] The type and content of the first treatment agent-containing composition and the type and content of the second treatment agent-containing composition are shown in the "First treatment agent-containing composition" and "Second treatment agent-containing composition" columns of Table 4, respectively.

[0131] [Table 4] Test Section 11 (Evaluation of two-component treatment-containing compositions) The resulting treatment-containing compositions of each example, such as Example 2-1, were evaluated for antistatic properties, smoothness, carding properties, and scum buildup properties in the same manner as for the treatment composition of Example 1-1. The results are shown in the "Antistatic Properties," "Smoothness," "Carding Properties," and "Scum Buildup Properties" columns of Table 4, respectively.

[0132] The results in the above table show that the present invention, even with a two-component treatment agent, can improve the antistatic properties, smoothness, and carding properties of synthetic fibers to which the treatment agent is applied. It also reduces the scum accumulation of fibers to which the treatment agent is applied after passing through each device.

[0133] Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below. The processing agent for polyester synthetic fibers of embodiment 11 is characterized by containing the following alkyl phosphate ester (A), nonionic surfactant (B), and nitrogen-containing potassium polycarboxylic acid salt (C).

[0134] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. In a twelfth aspect, in the treating agent for polyester synthetic fibers according to the eleventh aspect, the nitrogen-containing potassium polycarboxylic acid salt (C) has 1 to 3 nitrogen atoms per molecule and is acyclic.

[0135] A thirteenth aspect is the treatment agent for polyester synthetic fibers according to the eleventh or twelfth aspect, wherein the mass ratio of the alkyl phosphate ester (A) to the nonionic surfactant (B) is alkyl phosphate ester (A) / nonionic surfactant (B) = 20 / 80 to 80 / 20.

[0136] Aspect 14 is the treatment agent for polyester synthetic fibers according to any one of Aspects 11 to 13, wherein the treatment agent for polyester synthetic fibers contains, in the non-volatile content, 20% by mass or more and 75% by mass or less of the alkyl phosphate ester (A), 20% by mass or more and 75% by mass or less of the nonionic surfactant (B), and 0.2% by mass or more and 5.0% by mass or less of the nitrogen-containing potassium polycarboxylic acid salt (C).

[0137] A fifteenth aspect is the treating agent for polyester synthetic fibers according to any one of the eleventh to fourteenth aspects, wherein the alkyl group constituting the alkyl phosphate ester (A) has 16 to 18 carbon atoms.

[0138] A sixteenth aspect is the treating agent for polyester-based synthetic fibers according to any one of the eleventh to fifteenth aspects, further comprising the following inorganic phosphoric acid (D). Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

[0139] Aspect 17 is the treatment agent for polyester-based synthetic fibers according to Aspect 16, wherein the non-volatile content of the treatment agent for polyester-based synthetic fibers contains 20% by mass or more and 74.99% by mass or less of the alkyl phosphate ester (A), 20% by mass or more and 74.99% by mass or less of the nonionic surfactant (B), 0.2% by mass or more and 5.0% by mass or less of the nitrogen-containing potassium polycarboxylic acid salt (C), and more than 0% by mass or less and 5.0% by mass or less of the inorganic phosphoric acid (D).

[0140] Aspect 18 of the first treating agent for polyester synthetic fibers is a first treating agent for polyester synthetic fibers used in combination with a second treating agent for polyester synthetic fibers containing a nonionic surfactant (B), characterized in that at least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains a potassium salt of a nitrogen-containing polycarboxylic acid (C), and contains the following alkyl phosphate ester (A), and optionally the following inorganic phosphoric acid (D):

[0141] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

[0142] Aspect 19 of the second treating agent for polyester synthetic fibers is a second treating agent for polyester synthetic fibers used in combination with a first treating agent for polyester synthetic fibers containing the following alkyl phosphate ester (A) and, optionally, the following inorganic phosphoric acid (D), characterized in that at least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains a nitrogen-containing potassium polycarboxylic acid salt (C) and a nonionic surfactant (B).

[0143] Alkyl phosphate ester (A): At least one selected from alkyl phosphate esters having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

[0144] A polyester synthetic fiber according to a twentieth aspect is characterized in that the treating agent for polyester synthetic fibers according to any one of the eleventh to seventeenth aspects is adhered to the polyester synthetic fiber.

Claims

1. A treatment agent for polyester synthetic fibers, comprising 15% by mass or more and 85% by mass or less of the following alkyl phosphate ester (A), 5% by mass or more and 80% by mass or less of a nonionic surfactant (B), and 0.1% by mass or more and 15% by mass or less of the following nitrogen-containing potassium polycarboxylic acid salt (C). Alkyl phosphate (A): At least one selected from alkyl phosphates having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): The nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid salt is at least one compound selected from the group consisting of compounds represented by the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid. 【Chemistry 1】 R 1 and R 2 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Chemistry 2】 R 3 and R 4 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Transformation 3】 R 5 and R 7 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. R 6 and R 8 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. m: 1 or 2. (When there are two R 6 s, each R 6 may be the same or different.) 【Chemistry 4】 R 9 , R 10 , R 13 , and R 14 each independently represent a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. R 11 and R 12 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. n: 1 or 2. (When there are two R 11 s, each R 11 may be the same or different.)

2. 2. The treatment agent for polyester synthetic fibers according to claim 1, wherein the mass ratio of the alkyl phosphate ester (A) to the nonionic surfactant (B) is alkyl phosphate ester (A) / nonionic surfactant (B)=20 / 80 to 80 / 20.

3. 2. The treatment agent for polyester synthetic fibers according to claim 1, wherein the non-volatile components of the treatment agent for polyester synthetic fibers contain the alkyl phosphate ester (A) in an amount of 20% by mass or more and 75% by mass or less, the nonionic surfactant (B) in an amount of 20% by mass or more and 75% by mass or less, and the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass or more and 5.0% by mass or less.

4. 2. The treatment agent for polyester synthetic fibers according to claim 1, wherein the alkyl group constituting the alkyl phosphate ester (A) has 16 to 18 carbon atoms.

5. 2. The treatment agent for polyester synthetic fibers according to claim 1, further comprising the following inorganic phosphoric acid (D): Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

6. 6. The treatment agent for polyester synthetic fibers according to claim 5, wherein the non-volatile components of the treatment agent for polyester synthetic fibers contain the alkyl phosphate ester (A) in an amount of 20% by mass or more and 74.99% by mass or less, the nonionic surfactant (B) in an amount of 20% by mass or more and 74.99% by mass or less, the nitrogen-containing potassium polycarboxylic acid salt (C) in an amount of 0.2% by mass or more and 5.0% by mass or less, and the inorganic phosphoric acid (D) in an amount of more than 0% by mass and 5.0% by mass or less.

7. A first treating agent for polyester synthetic fibers to be used in combination with a second treating agent for polyester synthetic fibers containing a nonionic surfactant (B), At least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains the following nitrogen-containing potassium polycarboxylic acid salt (C): Contains the following alkyl phosphate ester (A) and optionally the following inorganic phosphoric acid (D): A first treating agent for polyester synthetic fibers, characterized in that a mixture of the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains 15% by mass or more and 85% by mass or less of the alkyl phosphate ester (A), 5% by mass or more and 80% by mass or less of the nonionic surfactant (B), and 0.1% by mass or more and 15% by mass or less of the nitrogen-containing potassium polycarboxylic acid salt (C). Alkyl phosphate (A): At least one selected from alkyl phosphates having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): The nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid salt is at least one compound selected from the group consisting of compounds represented by the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid. 【Transformation 5】 R 1 and R 2 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Transformation 6】 R 3 and R 4 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Transformation 7】 R 5 and R 7 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. R 6 and R 8 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. m: 1 or 2. (When there are two R 6 s, each R 6 may be the same or different.) 【Transformation 8】 R 9 , R 10 , R 13 , and R 14 each independently represent a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. R 11 and R 12 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. n: 1 or 2. (When there are two R 11 s, each R 11 may be the same or different.) Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

8. A second treating agent for polyester synthetic fibers to be used in combination with a first treating agent for polyester synthetic fibers, the second treating agent containing the following alkyl phosphate ester (A) and, optionally, the following inorganic phosphoric acid (D), At least one selected from the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains the following nitrogen-containing potassium polycarboxylic acid salt (C): Contains a nonionic surfactant (B), A second treating agent for polyester synthetic fibers, characterized in that a mixture of the first treating agent for polyester synthetic fibers and the second treating agent for polyester synthetic fibers contains 15% by mass or more and 85% by mass or less of the alkyl phosphate ester (A), 5% by mass or more and 80% by mass or less of the nonionic surfactant (B), and 0.1% by mass or more and 15% by mass or less of the nitrogen-containing potassium polycarboxylic acid salt (C). Alkyl phosphate (A): At least one selected from alkyl phosphates having an alkyl group having 16 to 22 carbon atoms in the molecule, and alkali metal salts thereof. Nitrogen-containing potassium polycarboxylic acid salt (C): The nitrogen-containing polycarboxylic acid constituting the nitrogen-containing potassium polycarboxylic acid salt is at least one compound selected from the group consisting of compounds represented by the following general formulas (1) to (4), hydroxyethylethylenediaminetriacetic acid, dihydroxyethylethylenediaminediacetic acid, 1,3-propanediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethyliminodiacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, and glycol ether diaminetetraacetic acid. 【Chemistry 9】 R 1 and R 2 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Chemistry 10】 R 3 and R 4 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. 【Chemistry 11】 R 5 and R 7 : each independently represents a residue obtained by removing one hydrogen atom bonded to a carbon atom from a carboxylic acid having 1 to 3 carbon atoms. R 6 and R 8 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. m: 1 or 2. (When there are two R 6 s, each R 6 may be the same or different.) 【Chemistry 12】 R 9 , R 10 , R 13 , and R 14 each independently represent a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. R 11 and R 12 : each independently a hydrogen atom or a residue in which one hydrogen atom bonded to a carbon atom has been removed from a carboxylic acid having 1 to 3 carbon atoms. n: 1 or 2. (When there are two R 11 s, each R 11 may be the same or different.) Inorganic phosphoric acid (D): At least one selected from inorganic phosphoric acid and metal salts thereof.

9. A polyester synthetic fiber having the treatment agent for polyester synthetic fiber according to any one of claims 1 to 6 adhered thereto.

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