Composition containing a treatment agent for acrylic synthetic fibers, method for preparing a diluted solution of the treatment agent for acrylic synthetic fibers, method for treating acrylic synthetic fibers, and acrylic synthetic fibers

Abstract

To provide: a composition containing an acrylic synthetic fiber treatment agent, which can improve formulation stability and an odor reduction effect and can also improve an effect to reduce sticking of fibers having the acrylic synthetic fiber treatment agent adhered; and the like.SOLUTION: A composition containing an acrylic synthetic fiber treatment agent, one of the present inventions, comprises: an acrylic synthetic fiber treatment agent comprising the following fatty acid amide compound (A), a nonionic surfactant (B), and the following organic carboxylic acid (C); and the following solvent (S). Fatty acid amide compound (A): a compound obtained by amidation of a C12-22 fatty acid and an organic amine. Organic carboxylic acid (C): a C3-22 fatty acid. Solvent (S): a solvent having a boiling point of 105°C or less under the atmospheric pressure.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a treatment agent-containing composition for acrylic synthetic fibers containing a predetermined fatty amide compound, a predetermined organic carboxylic acid, etc., a method for preparing a diluted solution of a treatment agent for acrylic synthetic fibers, a method for treating acrylic synthetic fibers, and acrylic synthetic fibers.

Background Art

[0002] When acrylic synthetic fibers are produced, for example, by the wet spinning method, a treatment agent for acrylic synthetic fibers is attached to a fiber bundle in a gel-swollen state, and then it is produced through a drying and densification process. The treatment agent for acrylic synthetic fibers used here is required to have excellent formulation stability and to reduce the adhesion between the single fibers constituting the fiber bundle. In addition, in the production of acrylic synthetic fibers in recent years, measures for reducing the load on the production environment are required.

[0003] Conventionally, for example, a treatment agent for acrylic synthetic fibers disclosed in Patent Document 1 is known. Such a treatment agent for acrylic synthetic fibers contains a predetermined polyoxyalkylene block copolymer, an oil and fat ethylene oxide adduct, a polyoxyethylene glycol alkenyl ether, and an organic phosphate ester salt.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, Patent Document 1 has insufficient formulation stability and odor reduction effect of a treatment agent-containing composition for acrylic synthetic fibers containing a treatment agent for acrylic synthetic fibers and a solvent, and insufficient adhesion reduction effect of fibers to which the treatment agent for acrylic synthetic fibers is attached.

Means for Solving the Problems

[0006] However, as a result of research conducted to solve the above-mentioned problems, the present inventors have found that a treatment agent-containing composition for acrylic synthetic fibers comprising a predetermined fatty amide compound, a nonionic surfactant, a predetermined organic carboxylic acid, and a predetermined solvent is indeed suitable.

[0007] To solve the above problems, a composition containing a treatment agent for acrylic synthetic fibers according to one aspect of the present invention contains a treatment agent for acrylic synthetic fibers containing the following fatty acid amide compound (A), a nonionic surfactant (B), and the following organic carboxylic acid (C), and the following solvent (S). Furthermore, in the acrylic synthetic fiber treatment agent, if the total content of the fatty acid amide compound (A), the nonionic surfactant (B), and the organic carboxylic acid (C) is 100 parts by mass, the fatty acid amide compound (A) is contained in a proportion of 20 parts by mass or more and 80 parts by mass or less, the nonionic surfactant (B) in a proportion of 10 parts by mass or more and 50 parts by mass or less, and the organic carboxylic acid (C) in a proportion of 2 parts by mass or more and 40 parts by mass or less, and in the acrylic synthetic fiber treatment agent, oily components other than the fatty acid amide compound (A) and the organic carboxylic acid (C) are less than 10% by mass. The gist of this is to say that.

[0008] Fatty acid amide compounds (A): Compounds obtained by amidating a fatty acid with 12 to 22 carbon atoms with an organic amine. Organic carboxylic acids (C): Fatty acids with 3 to 22 carbon atoms.

[0009] Solvent (S): A solvent whose boiling point at atmospheric pressure is 105°C or lower. In the aforementioned acrylic synthetic fiber treatment agent-containing composition, the solvent (S) may be water.

[0010] To solve the above problems, one embodiment of the present invention provides a treatment agent-containing composition for acrylic synthetic fibers, comprising a treatment agent for acrylic synthetic fibers containing the following fatty acid amide compound (A), a nonionic surfactant (B), and the following organic carboxylic acid (C), and the following solvent (S), wherein the solvent (S) is contained in a ratio of 150 parts by mass to 1000 parts by mass per 100 parts by mass of the treatment agent for acrylic synthetic fibers, and the oily components other than the fatty acid amide compound (A) and the organic carboxylic acid (C) in the treatment agent for acrylic synthetic fibers are less than 10% by mass. Fatty acid amide compounds (A): Compounds obtained by amidating a fatty acid with 12 to 22 carbon atoms with an organic amine. Organic carboxylic acids (C): Fatty acids with 3 to 22 carbon atoms. Solvent (S): A solvent whose boiling point at atmospheric pressure is 105°C or lower.

[0011] In the aforementioned acrylic synthetic fiber treatment agent-containing composition, the solvent (S) may be water.

[0012] To solve the above problems, a method for preparing a diluted solution of an acrylic synthetic fiber treatment agent according to one aspect of the present invention is characterized by adding the acrylic synthetic fiber treatment agent-containing composition to a solvent and adjusting the non-volatile content concentration to 0.01% by mass or more and 9% by mass or less.

[0013] To solve the above problems, one embodiment of the present invention provides a method for treating acrylic synthetic fibers, comprising adding the acrylic synthetic fiber treatment agent-containing composition to a solvent and applying a diluted solution of the acrylic synthetic fiber treatment agent to the acrylic synthetic fiber.

[0014] To solve the above problems, one embodiment of the present invention provides an acrylic synthetic fiber to which the aforementioned treatment agent for acrylic synthetic fibers is attached. [Effects of the Invention]

[0015] According to the present invention, the formulation stability and odor reduction effect of a composition containing a treatment agent for acrylic synthetic fibers can be improved, and the effect of reducing adhesion of fibers to which the treatment agent for acrylic synthetic fibers is attached can be improved. [Modes for carrying out the invention]

[0016] <First Embodiment> First, a first embodiment of the treatment agent-containing composition for acrylic synthetic fibers according to the present invention (hereinafter referred to as the "treatment agent-containing composition") will be described. The treatment agent-containing composition contains a treatment agent for acrylic synthetic fibers (hereinafter referred to as the "treatment agent") containing the following fatty acid amide compound (A), nonionic surfactant (B), and the following organic carboxylic acid (C), and the following solvent (S).

[0017] (Fatty acid amide compound (A)) The fatty acid amide compound (A) used in the treatment agent-containing composition of this embodiment is a compound obtained by amidating a fatty acid having 12 to 22 carbon atoms with an organic amine. By using such a compound, the effect of reducing adhesion of fibers to which the treatment agent for acrylic synthetic fibers is attached can be improved. The fatty acid having 12 to 22 carbon atoms that serves as the raw material for the fatty acid amide compound (A) is not particularly limited as long as it can produce a fatty acid amide compound by condensation with an organic amine, as described later. Known fatty acids can be used as appropriate, and they may be saturated fatty acids or unsaturated fatty acids. They may also be linear or have a branched chain structure.

[0018] Specific examples of saturated fatty acids include, for example, dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), and the like.

[0019] Specific examples of unsaturated fatty acids include, for example, myristoleic acid, palmitoleic acid, oleic acid, vaccenic acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, arachidonic acid, and the like.

[0020] In addition, the fatty acid may be applied as an activated acid component, such as a carboxylic acid ester, a carboxylic acid halide, a carboxylic acid anhydride, a carboxylic acid azide, an active ester, etc., during the condensation reaction with the actual organic amine.

[0021] The organic amine serving as a raw material for the fatty acid amide compound (A) is not particularly limited as long as it can form a fatty acid amide compound condensed by an amide bond with the above-mentioned fatty acid. The organic amine may be any of a primary amine, a secondary amine, and a tertiary amine. Also, it may be a monoamine or a polyamine such as a diamine or a triamine.

[0022] Specific examples of monoamines include, for example, (1) aliphatic monoamines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, N-N-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, dimethyllaurylamine, etc., (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, etc., (3) arylamines such as N-methylbenzylamine, (4) ammonia, etc. In the present invention, ammonia is also included in the organic amine.

[0023] Specific examples of polyamines include (1) diamines such as ethylenediamine, putrescine, cadaverine, diaminopropane, tetramethylenediamine, hexamethylenediamine, polyoxypropylenediamine, phenylenediamine, and piperazine; (2) triamines such as spermidine, diethylenetriamine, and polyoxypropylenetriamine; and (3) tetraamines such as spermine and triethylenetetramine.

[0024] The fatty acid amide compound (A) is obtained by condensing a fatty acid having 12 to 22 carbon atoms with an organic amine, as described above. The condensation reaction can be carried out by known methods. In addition, a catalyst such as an acid or alkali may be used during the condensation reaction if necessary, and the reaction may be heated to a temperature that promotes the reaction.

[0025] Specific examples of fatty acid amide compounds (A) include, for example, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, behenic acid amide, monolauric acid amide of diethylenetriamine, dilauric acid amide of diethylenetriamine, dipalmitic acid amide of diethylenetriamine, monostearic acid amide of diethylenetriamine, distearic acid amide of diethylenetriamine, dioleic acid amide of diethylenetriamine, and dibehenic acid amide of diethylenetriamine.

[0026] These fatty acid amide compounds (A) may be used individually, or two or more fatty acid amide compounds may be used in appropriate combinations. In the treatment agent, the lower limit of the content of fatty acid amide compound (A) is preferably 15% by mass or more, more preferably 20% by mass or more. When the content is 15% by mass or more, the effect of reducing adhesion of fibers to which the treatment agent has been applied can be further improved. The upper limit of the content of fatty acid amide compound (A) is preferably 85% by mass or less, more preferably 80% by mass or less. When the content is 85% by mass or less, the formulation stability of the treatment agent-containing composition can be further improved. It should be noted that a range of arbitrary combinations of the above upper and lower limits is also conceivable.

[0027] (Nonionic surfactant (B)) Nonionic surfactant (B) can improve the formulation stability of the treatment agent-containing composition when incorporated into the treatment agent.

[0028] Examples of nonionic surfactants (B) include those having a (poly)oxyalkylene structure obtained by adding alkylene oxide to alcohols or carboxylic acids, ether ester compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to ester compounds of carboxylic acids and polyhydric alcohols, amine compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to aliphatic amines, those having a (poly)oxyalkylene structure obtained by adding alkylene oxide to fatty acid amides, partial ester compounds of carboxylic acids and polyhydric alcohols having a cyclic structure with 3 to 6 carbon atoms, and block copolymers of polyoxyethylene chains and polyoxypropylene chains.

[0029] Specific examples of alcohols used as raw materials for nonionic surfactants (B) include, for example, (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, heptadecanol, octacosanol, nonacosanol, and triacontanol; (2) isopropanol, isobutanol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isotriacontanol, isohe Examples include: (3) branched alkyl alcohols such as xadecanol, isoheptadecanol, isooctadecanol, isononadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexacosanol, isoheptacosanol, isooctactasanol, isononacosanol, and isopentadecanol; (4) linear alkenyl alcohols such as tetradecenol, hexadecenol, heptadecenol, octadecenol, and nonadecenol; (5) branched alkenyl alcohols such as isohexadecenol and isooctadecenol; (6) cyclic alkyl alcohols such as cyclopentanol and cyclohexanol; and aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrene-modified phenol, distylenide, and tristyrene-modified phenol.

[0030] Specific examples of carboxylic acids used as raw materials for nonionic surfactants (B) include, for example, (1) linear alkyl carboxylic acids such as octic 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; and (5) hydroxycarboxylic acids such as resinoleic acid.

[0031] As the alkylene oxide used as a raw material for forming the (poly)oxyalkylene structure of the nonionic surfactant (B), alkylene oxides having 2 to 4 carbon atoms are preferred. Specific examples of alkylene oxides include ethylene oxide, propylene oxide, and butylene oxide. The number of moles of alkylene oxide to be added is set as appropriate, but is preferably 0.1 moles to 250 moles, more preferably 1 mole to 200 moles, and even more preferably 2 moles to 150 moles. Ranges arbitrarily combining the above upper and lower limits are also conceivable. The number of moles of alkylene oxide to be added indicates the number of moles of alkylene oxide per mole of the compound to be added in the raw materials. One type of alkylene oxide may be used alone, or two or more types of alkylene oxide may be used in appropriate combination. When two or more types of alkylene oxide are applied, their addition method may be block addition, random addition, or a combination of block addition and random addition, and is not particularly limited.

[0032] Specific examples of polyhydric alcohols used as raw materials for nonionic surfactants (B) include, for example, 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, sorbitol, and the like.

[0033] Specific examples of aliphatic amines used as raw materials for nonionic surfactants (B) include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine, octadecenylamine, and coconutamine.

[0034] Specific examples of fatty acid amides used as raw materials for nonionic surfactants (B) include, for example, octylic acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, behenic acid amide, and lignoceric acid amide.

[0035] The block copolymer of polyoxyethylene chains and polyoxypropylene chains is not particularly limited as long as it has a polyoxypropylene chain with low hydrophilicity and a polyoxyethylene chain with high hydrophilicity and exhibits surfactant activity. The number of polyoxyethylene chains and polyoxypropylene chains in the molecule is not particularly limited; for example, it may be a block copolymer consisting of one polyoxypropylene chain and one polyoxyethylene chain, or it may be a poloxamer-type surfactant consisting of a polyoxypropylene chain and two polyoxyethylene chains flanking it. The number of moles of ethylene oxide added to form the polyoxyethylene chain is not particularly limited; for example, it may be between 5 moles and 200 moles. The number of moles of propylene oxide added to form the polyoxypropylene chain is not particularly limited; for example, it may be between 5 moles and 100 moles.

[0036] Specific examples of nonionic surfactants (B) include, for example, polyoxyethylene (n=5: indicating the number of moles of ethylene oxide added (same applies below)) lauryl ether, polyoxyethylene (n=14) oleyl ether, polyoxyethylene (n=20) oleyl ether, polyoxyethylene (n=8) stearyl ether, polyoxyethylene (n=14) oleate, polyoxyethylene (n=30) oleate, polyoxyethylene (n=7) laurylamine ether, polyoxyethylene (n=19) stearylamine ether, polyoxyethylene (n=14) oleylamine ether, polyoxyethylene (n=30) oleylamine ether, polyoxyethylene Examples include (n=16) stearic acid amide ester, polyoxyethylene (n=24) stearic acid amide ester, polyoxyethylene (n=17) oleic acid amide ester, polyoxyethylene (n=28) oleic acid amide ester, polyoxyethylene (n=10) nonylphenol ether, polyoxyethylene (n=200) castor oil ester, polyoxyalkylene block copolymer with a number average molecular weight of 5000 (ethylene oxide (hereinafter referred to as "EO") / propylene oxide (hereinafter referred to as "PO") = 30 / 70, molar ratio), and polyoxyalkylene block copolymer with a number average molecular weight of 10000 (EO / PO = 70 / 30, molar ratio).

[0037] These nonionic surfactants (B) may be used individually or in combination of two or more nonionic surfactants as appropriate. In the treatment agent, the lower limit of the content of nonionic surfactant (B) is preferably 5% by mass or more, more preferably 10% by mass or more. When the content is 5% by mass or more, the formulation stability of the treatment agent-containing composition can be further improved. The upper limit of the content of nonionic surfactant (B) is preferably 55% by mass or less, more preferably 50% by mass or less. When the content is 55% by mass or less, the effect of reducing adhesion of fibers to which the treatment agent has been applied can be further improved. It should be noted that a range of arbitrary combinations of the above upper and lower limits is also conceivable.

[0038] (Organic carboxylic acid (C)) The organic carboxylic acid (C) used in the treatment agent-containing composition of this embodiment is a fatty acid having 3 to 22 carbon atoms. By using such a compound, the odor of the treatment agent can be reduced while improving the stability of the formulation. Any known fatty acid can be used as appropriate, and it may be a saturated fatty acid or an unsaturated fatty acid. It may also be a linear or branched fatty acid. Furthermore, it may be a monohydric fatty acid or a polyhydric carboxylic acid. It may also be an oxycarboxylic acid having a hydroxyl group.

[0039] Specific examples of monounsaturated fatty acids include propionic acid, butyric acid, valeric acid, hexanoic acid (caproic acid), octicic acid (2-ethylhexanoic acid), octanoic acid (caprylic acid), nonanoic acid, decanoic acid (capric acid), dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), and docosanoic acid (behenic acid). Specific examples of monounsaturated fatty acids include crotonic acid, myristoleic acid, palmitoleic acid, oleic acid, vaccenic acid, eicosenoic acid, linoleic acid, alpha-linolenic acid, gamma-linolenic acid, and arachidonic acid.

[0040] Specific examples of polycarboxylic acids having 3 to 22 carbon atoms include, for example, (1) dicarboxylic acids such as malonic acid, succinic acid, fumaric acid, maleic acid, adipic acid, and sebacic acid; (2) tricarboxylic acids such as aconitic acid; (3) aromatic dicarboxylic acids such as benzoic acid, terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid; (4) aromatic tricarboxylic acids such as trimellitic acid; and (5) aromatic tetracarboxylic acids such as pyromellitic acid.

[0041] Specific examples of oxycarboxylic acids include citric acid, lactic acid, tartaric acid, glycolic acid, malic acid, ricinoleic acid, and hydroxybutyric acid. These organic carboxylic acids (C) may be used individually or in combination of two or more organic carboxylic acids as appropriate.

[0042] In the treatment agent, the lower limit of the content of organic carboxylic acid (C) is preferably 1% by mass or more, more preferably 2% by mass or more. When the content is 1% by mass or more, the formulation stability of the treatment agent-containing composition can be further improved. The upper limit of the content of organic carboxylic acid (C) is preferably 45% by mass or less, more preferably 40% by mass or less. When the content is 45% by mass or less, the odor reduction effect of the treatment agent can be further improved. It should be noted that a range of arbitrary combinations of the above upper and lower limits is also conceivable.

[0043] In the aforementioned treatment agent, if the total content of the fatty acid amide compound (A), nonionic surfactant (B), and organic carboxylic acid (C) is 100 parts by mass, it is preferable that the fatty acid amide compound (A) is contained in proportions of 20 parts by mass or more and 80 parts by mass or less, the nonionic surfactant (B) in proportions of 10 parts by mass or more and 50 parts by mass or less, and the organic carboxylic acid (C) in proportions of 2 parts by mass or more and 40 parts by mass or less. By specifying within this range, the effects of the present invention can be further improved. It should be noted that ranges by arbitrarily combining the above upper and lower limits are also conceivable. Furthermore, in the treatment agent, oily components other than the fatty acid amide compound (A) and the organic carboxylic acid (C) are present in an amount of less than 10% by mass.

[0044] (Solvent (S)) The solvent (S) used in the treatment agent-containing composition of this embodiment is a solvent having a boiling point of 105°C or lower at atmospheric pressure. Examples of solvents include water and organic solvents. Examples of organic solvents include aliphatic alcohols having 1 to 3 carbon atoms and low-polarity solvents such as hexane. Specific examples of aliphatic alcohols include methanol, ethanol, propanol, and isopropanol. These solvents may be used individually or in appropriate combinations of two or more.

[0045] Among these, those containing water are preferred from the viewpoint of excellent formulation stability and handling of the treatment agent-containing composition. In the treatment agent-containing composition, the solvent (S) is preferably contained in a ratio of 100 parts by mass or more and 1000 parts by mass or less, more preferably 150 parts by mass or more and 1000 parts by mass or less, per 100 parts by mass of the total mass of the treatment agent. A range arbitrarily combining the above upper and lower limits is also conceivable. By defining the solvent within such a range, the formulation stability of the treatment agent-containing composition can be further improved. Furthermore, the homogeneity and handling ease when further diluting the treatment agent-containing composition with the solvent can be improved.

[0046] According to the treatment agent-containing composition of the first embodiment described above, the following effects can be obtained. (1-1) In the first embodiment, the treatment agent-containing composition is configured to contain the treatment agent containing the fatty acid amide compound (A), nonionic surfactant (B), and organic carboxylic acid (C) described above, and the solvent (S) described above. Therefore, the formulation stability and odor reduction effect of the treatment agent-containing composition can be improved. In addition, the effect of reducing adhesion of fibers to which the treatment agent is attached can be improved.

[0047] <Second Embodiment> Next, a second embodiment of the acrylic synthetic fiber according to the present invention will be described. The following description will focus on the differences from the first embodiment.

[0048] In this embodiment, the acrylic synthetic fiber has the treatment agent of the first embodiment attached to it. Such an acrylic synthetic fiber can be obtained by a method for treating acrylic synthetic fibers, for example, by applying a diluted solution of the treatment agent for acrylic synthetic fibers (hereinafter referred to as "dilution"), which is obtained by adding the treatment agent-containing composition of the first embodiment to a solvent, to the acrylic synthetic fiber.

[0049] The method for preparing the diluent involves adding the treatment agent-containing composition of the first embodiment to a solvent, and preferably adjusting the non-volatile content concentration in the diluent to 0.01% by mass or more and 9% by mass or less. The non-volatile content is determined from the mass of the oven-dried product obtained by heat-treating the target material at 105°C for 2 hours to sufficiently remove volatile substances. The solvent can be one of those exemplified in the first embodiment.

[0050] The process of applying the diluted solution to the acrylic synthetic fiber includes the spinning process, the drawing process, and the processes after drawing. It is preferable to apply it to the fiber bundle, which is in a gel-swollen state after wet spinning, drawing, and washing. The application method can be any of the following: immersion method, spray method, roller lubrication method, guide lubrication method, etc., but the immersion method or spray method is preferred. When the treatment agent is applied to the fiber bundle in a gel-swollen state, the fiber is usually heat-treated to dry and densify after application of the treatment agent. The heat treatment is preferably carried out at a temperature of 120°C to 180°C for 1 minute to 7 minutes. After drying and densifying, the fiber may usually be heat-treated again. The temperature of the heat treatment at this time is 180°C or lower for dry heat and 130°C or lower for wet heat. The amount of treatment agent applied is preferably 0.02% to 1.5% by mass, more preferably 0.05% to 1% by mass, relative to the acrylic synthetic fiber.

[0051] The acrylic synthetic fibers to which the treatment agent is attached are not particularly limited, but in the present invention, for example, they include (1) acrylic fibers copolymerized with 40% by mass or more of acrylonitrile and 60% by mass or less of non-halogenated vinyl monomers such as (meth)acrylic acid, alkyl (meth)acrylate, (meth)allyl sulfonate, styrene sulfonate, vinyl sulfonate, etc.; (2) modacrylic fibers copolymerized with halogenated vinyl monomers such as vinyl chloride and vinylidene chloride and acrylonitrile; and (3) modacrylic fibers to which halogenated compounds, etc., are added.

[0052] The effects of the acrylic synthetic fiber of the second embodiment described above will now be explained. (2-1) The acrylic synthetic fiber of the second embodiment is treated with a treatment agent containing the fatty acid amide compound (A), nonionic surfactant (B), and organic carboxylic acid (C) described above. Therefore, the effect of reducing fiber adhesion can be improved.

[0053] The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically. The treatment agent, the treatment agent-containing composition, and the diluent may contain commonly used components such as stabilizers and antistatic agents for quality preservation, oily components other than those mentioned above, surfactants other than those mentioned above, antistatic agents, binders, antioxidants, ultraviolet absorbers, and defoamers, to the extent that they do not impair the effects of the present invention. Furthermore, from the viewpoint of efficiently exhibiting the efficacy of the present invention, the amount of other components other than the solvent in the treatment agent is preferably 20% by mass or less, and more preferably 10% by mass or less.

[0054] The fields to which the acrylic synthetic fibers of the above embodiment can be applied are not particularly limited. Examples include knitted products such as sweaters, blankets, cushions, yarn, carpets, wigs, and the like. [Examples]

[0055] The following examples illustrate the structure and effects of the present invention in more detail, but the present invention is not limited to these examples. In the following examples and comparative examples, "parts" refers to parts by mass, and "%" refers to mass percent.

[0056] Test Category 1 (Preparation of Compositions Containing Treatment Agents) (Example 1) As shown in Table 1, a treatment agent was prepared containing 45 parts (%) of lauric acid amide (A-1) as a fatty acid amide compound (A), 22 parts (%) of polyoxyethylene (n=5) lauryl ether (B-1) and 22 parts (%) of polyoxyethylene (n=14) oleyl ether (B-2) as nonionic surfactants (B), and 7 parts (%) of lauric acid (C-2) and 4 parts (%) of citric acid (C-10) as organic carboxylic acids (C). Furthermore, 100 parts of the treatment agent and 435 parts of water (S-1) as a solvent (S) were mixed to prepare the treatment agent-containing composition of Example 1.

[0057] (Examples 2-23, Comparative Examples 1-7) The treatment agent-containing compositions of Examples 2-23 and Comparative Examples 1-7 were prepared in the same manner as in Example 1, using a fatty acid amide compound (A), a nonionic surfactant (B), an organic carboxylic acid (C), a solvent (S), and other components (D) as raw materials, in the proportions shown in Table 1.

[0058] Table 1 shows the types and content of fatty acid amide compounds (A), nonionic surfactants (B), organic carboxylic acids (C), water (S-1), and other components (D) in the "Fatty Acid Amide Compounds (A)" column, "Nonionic Surfactants (B)" column, "Organic Carboxylic Acids (C)" column, "Solvent (S)" column, and "Other Components (D)" column, respectively. The content of other components (D) is shown as the amount in parts relative to 100 parts of the total of components (A) to (C). The content of water (S-1) is also shown as the amount in parts relative to 100 parts of the total of components (A) to (C).

[0059] [Table 1]

[0060] The details of the fatty acid amide compounds (A), nonionic surfactants (B), organic carboxylic acids (C), solvents (S), and other components (D) listed in the classification column of Table 1 are as follows. (Fatty acid amide compound (A)) A-1: Lauric acid amide A-2: Palmitic acid amide A-3: Stearic acid amide A-4: Oleamide A-5: Beheninamide A-6: Diethylenetriamine monolaurate A-7: Diethylenetriamine dilauric acid amide A-8: Diethylenetriamine dipalmitic acid amide A-9: Monostearate of diethylenetriamine A-10: Diethylenetriamine distearic acid amide A-11: Diethylenetriamine dioleamide A-12: Diethylenetriamine dibeheninamide rA-1: Octylamide rA-2: Lignoceric acid amide (Nonionic surfactant (B)) B-1: Polyoxyethylene (n=5) lauryl ether B-2: Polyoxyethylene (n=14) oleyl ether B-3: Polyoxyethylene (n=20) oleyl ether B-4: Polyoxyethylene (n=8) Stealthar B-5: Polyoxyethylene (n=14) Oleate B-6: Polyoxyethylene (n=30) Oleate B-7: Polyoxyethylene (n=7) laurylamine ether B-8: Polyoxyethylene (n=19) stearylamine ether B-9: Polyoxyethylene (n=14) oleylamine ether B-10: Polyoxyethylene (n=30) oleylamine ether B-11: Polyoxyethylene (n=16) stearic acid amide ester B-12: Polyoxyethylene (n=24) stearic acid amide ester B-13: Polyoxyethylene (n=17) oleic acid amide ester B-14: Polyoxyethylene (n=28) oleic acid amide ester B-15: Polyoxyethylene (n=10) nonylphenol ether B-16: Polyoxyethylene (n=200) castor oil ester B-17: Polyoxyalkylene block copolymer with a number-average molecular weight of 5000 (EO / PO = 30 / 70, molar ratio) B-18: Polyoxyalkylene block copolymer with a number-average molecular weight of 10,000 (EO / PO = 70 / 30, molar ratio) (Organic carboxylic acid (C)) C-1: Propionic acid C-2: Lauric acid C-3: Palmitic acid C-4: Stearic acid C-5: Oleic acid C-6: Behenic acid C-7: Lactic acid C-8: Malic acid C-9:Tartaric acid C-10: Citric Acid rC-1: Acetic acid (Solvent (S)) S-1: Water (Other ingredients (D)) D-1: Potassium salt of phosphate ester of polyoxyethylene (n=16) cetyl ether. Test category 2 (Formulation stability) The formulation stability of the treatment agent-containing compositions obtained in test category 1 was evaluated.

[0061] After preparing each treatment agent-containing composition, it was left at room temperature for 24 hours, and then its appearance was visually evaluated according to the following criteria. The results are shown in the "Formulation Stability" column of Table 1. • Criteria for evaluating the stability of pharmaceutical formulations ◎(Good): No watering or separation is observed, and the surface is uniform. ○(Acceptable): Slight moistness or separation may be present, but it does not pose a problem. × (Not acceptable): When formulation separation is a significant problem. Test Category 3 (Evaluation of Odor Reduction) Each 100g container of the treatment agent-containing composition was sealed and incubated at 25°C × 65% RH for 24 hours. The lid was then opened and the odor was smelled. The odor test was conducted on 10 testers. The results are shown in the "Odor Reduction" column of Table 1. A "-" indicates that the evaluation was not performed due to poor formulation stability.

[0062] • Evaluation criteria for odor reduction ◎(Good): Two or fewer people detected an odor. ○ (Acceptable): 3 to 6 people judged that there was an odor.

[0063] × (Not acceptable): Seven or more people determined that there was an odor. Test Category 4 (Stalemate Reduction) • Adhesion of treatment agent to modacrylic fibers An acrylic copolymer, obtained by copolymerizing acrylonitrile / vinyl chloride / vinylidene chloride / sodium styrene sulfonate in a ratio of 60 / 34.5 / 5 / 0.5, was dissolved in dimethyl sulfoxide to a concentration of 25% to prepare a spinning stock. This spinning stock was passed through a 25,000-hole spinneret and spun into a dimethyl sulfoxide / water solution of 65 / 35 (%) at 20°C. After being stretched 5.5 times, it was washed with water to obtain gel-swollen fibers. Dilutions were prepared using water to achieve a non-volatile content of 5%, and each dilution was applied to the gel-swollen fibers using a spray lubrication method. The fibers were then densified in a roller dryer at a surface temperature of 140°C to form fiber bundles.

[0064] • Evaluation of stalemate reduction The fiber bundles described above were cut into 5 mm lengths, and 0.5 g of each cut fiber bundle was placed in a 500 ml aqueous solution. The mixture was stirred with a stirrer at 100 rpm for 1 minute, and then left to stand for 1 minute. The sedimentary fibers were observed, and the number of fibers with a diameter of 0.5 mm was counted as adhering fibers and evaluated according to the following criteria. The results are shown in the "Adhesion Reduction" column of Table 1. Note that "-" indicates that evaluation was not performed due to poor formulation stability.

[0065] • Criteria for evaluating the reduction of stalemate ◎(Good): 0 adhesive fibers ○ (Acceptable): 1 to 10 adhesive fibers × (Not allowed): 11 or more adhesive fibers As is clear from the results in Table 1, the present invention provides a treatment agent-containing composition with excellent formulation stability and odor reduction effect. Furthermore, it can improve the effect of reducing adhesion of fibers to which the treatment agent is attached.

Claims

1. A treatment agent for acrylic synthetic fibers containing the following fatty acid amide compound (A), nonionic surfactant (B), and organic carboxylic acid (C), and the following solvent (S), In the aforementioned treatment agent for acrylic synthetic fibers, if the total content of the fatty acid amide compound (A), the nonionic surfactant (B), and the organic carboxylic acid (C) is 100 parts by mass, then the fatty acid amide compound (A) is contained in a proportion of 20 parts by mass or more and 80 parts by mass or less, the nonionic surfactant (B) in a proportion of 10 parts by mass or more and 50 parts by mass or less, and the organic carboxylic acid (C) in a proportion of 2 parts by mass or more and 40 parts by mass or less. A composition containing a treatment agent for acrylic synthetic fibers, characterized in that the oily components other than the fatty acid amide compound (A) and the organic carboxylic acid (C) in the aforementioned treatment agent for acrylic synthetic fibers are less than 10% by mass. Fatty acid amide compound (A): A compound obtained by amidating a fatty acid with 12 to 22 carbon atoms with an organic amine. Organic carboxylic acids (C): Fatty acids with 3 to 22 carbon atoms. Solvent (S): A solvent whose boiling point at atmospheric pressure is 105°C or lower.

2. The acrylic synthetic fiber treatment agent-containing composition according to claim 1, wherein the solvent (S) is water.

3. A treatment agent for acrylic synthetic fibers containing the following fatty acid amide compound (A), nonionic surfactant (B), and organic carboxylic acid (C), and the following solvent (S), The solvent (S) is contained in an amount of 150 parts by mass or more and 1000 parts by mass or less per 100 parts by mass of the acrylic synthetic fiber treatment agent. A composition containing a treatment agent for acrylic synthetic fibers, characterized in that the oily components other than the fatty acid amide compound (A) and the organic carboxylic acid (C) in the aforementioned treatment agent for acrylic synthetic fibers are less than 10% by mass. Fatty acid amide compound (A): A compound obtained by amidating a fatty acid with 12 to 22 carbon atoms with an organic amine. Organic carboxylic acids (C): Fatty acids with 3 to 22 carbon atoms. Solvent (S): A solvent whose boiling point at atmospheric pressure is 105°C or lower.

4. The acrylic synthetic fiber treatment agent-containing composition according to claim 3, wherein the solvent (S) is water.

5. A method for preparing a diluted solution of an acrylic synthetic fiber treatment agent, characterized by adding the acrylic synthetic fiber treatment agent-containing composition described in any one of claims 1 to 4 to a solvent, and adjusting the non-volatile content concentration to 0.01% by mass or more and 9% by mass or less.

6. A method for treating acrylic synthetic fibers, characterized by applying a diluted solution of an acrylic synthetic fiber treatment agent obtained by adding the acrylic synthetic fiber treatment agent-containing composition described in any one of claims 1 to 4 to a solvent to the acrylic synthetic fiber.

7. An acrylic synthetic fiber characterized by having the acrylic synthetic fiber treatment agent described in any one of claims 1 to 4 attached to it.

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