Treatment agent for synthetic fiber and synthetic fiber

Abstract

The subject of the present invention is to provide a synthetic fiber treatment agent that can reduce the accumulation of tar when it is given to a synthetic fiber for use after long-term storage. The synthetic fiber treatment agent of the present invention is characterized in that it contains an organic sulfur compound (X) including an organic polysulfide compound (X1) and an ionic surfactant (Y) including an organic sulfonic acid compound (Y1). The organic polysulfide compound (X1) is at least one selected from sulfonated triacylglycerol (X1-1), sulfonated fatty acid monoester (X1-2), sulfonated fatty acid (X1-3), and sulfonated olefin (X1-4). The organic sulfonic acid compound (Y1) does not have a carbonyl group in the molecule.

Description

Technical Field

[0001] The present invention relates to a synthetic fiber treatment agent capable of reducing the accumulation of tar imparted to synthetic fibers when the fibers are used after long-term storage, and to synthetic fibers to which the synthetic fiber treatment agent is imparted. Background Art

[0002] In the spinning and drawing process of synthetic fibers, a treatment is sometimes performed to allow a synthetic fiber treatment agent to adhere to the surface of the synthetic fibers in order to improve smoothness, antistatic properties, and the like.

[0003] Patent Documents 1 to 7 disclose synthetic fiber treatment agents. Patent Document 1 discloses a method for treating thermoplastic synthetic fiber yarns with an oil containing a specified alkyl polysulfide. Patent Document 2 discloses a method for treating polyester synthetic fibers with an oil containing an aliphatic triester of trimethylolalkane, a dialkyl polysulfide, or the like. Patent Document 3 discloses an oil for polyester industrial yarns containing a sulfurized vegetable oil or the like as an adhesive improver. Patent Document 4 discloses that an antioxidant such as an alkyl sulfide can be blended into a heat-resistant synthetic fiber spinning oil containing an aliphatic tricarboxylic acid ester. Patent Document 5 discloses a synthetic fiber treatment agent containing a smoothing agent, an ester compound having a sulfide group, a secondary alkanesulfonic acid, or the like. Patent Document 6 discloses a synthetic fiber treatment agent containing bis[2-methyl-4-(3-n-laurylthiopropionyloxy)-5-tert-butylphenyl] sulfide as a sulfur-based antioxidant and dodecanesulfonic acid as an antistatic agent. Patent Document 7 discloses a synthetic fiber treating agent containing di(2-octyl-1-decanol)dimercaptopropionic acid, polyoxyethylene hydrogenated castor oil, polyoxyethylene dodecylamine, sorbitan monooleate, and the like.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Publication No. 48-1445

[0007] Patent Document 2: Japanese Patent Application Laid-Open No. 48-44597

[0008] Patent Document 3: Chinese Patent Application Publication No. 1904200

[0009] Patent Document 4: Japanese Patent Publication No. 48-41479

[0010] Patent Document 5: Japanese Patent No. 3488563

[0011] Patent Document 6: Japanese Patent No. 4090036

[0012] Patent Document 7: Japanese Patent No. 6530129 Summary of the Invention

[0013] Problems to be solved by the invention

[0014] However, conventional synthetic fiber treatment agents have a problem in that they tend to cause accumulation of tar when applied to synthetic fibers for use after long-term storage.

[0015] Means for solving problems

[0016] The present inventors have conducted studies to solve the above-mentioned problems and have found that a composition containing an organic sulfur compound including a predetermined organic polysulfide compound and an ionic surfactant including a predetermined organic sulfonic acid compound is suitable for a synthetic fiber treating agent.

[0017] Various methods for solving the above-mentioned problems are described.

[0018] The synthetic fiber processing agent of embodiment 1 is characterized by containing an organic sulfur compound (X) including the following organic polysulfide compound (X1) and an ionic surfactant (Y) including the following organic sulfonic acid compound (Y1).

[0019] Organic polysulfide compound (X1): at least one selected from the group consisting of sulfided triacylglycerol (X1-1), sulfided fatty acid monoester (X1-2), sulfided fatty acid (X1-3), and sulfided olefin (X1-4).

[0020] Organic sulfonic acid compound (Y1): an organic sulfonic acid compound having no carbonyl group in the molecule.

[0021] Regarding embodiment 2, in the synthetic fiber processing agent described in embodiment 1, the above-mentioned organic polysulfide compound (X1) is at least one selected from the above-mentioned sulfided triacylglycerol (X1-1) having a mass average molecular weight of 1800 or more, the above-mentioned sulfided fatty acid monoester (X1-2) having a mass average molecular weight of 900 or more, the above-mentioned sulfided fatty acid (X1-3) having a mass average molecular weight of 800 or more, and the above-mentioned sulfided olefin (X1-4) having a hydrocarbon group other than a straight-chain primary alkyl group.

[0022] Regarding embodiment 3, in the synthetic fiber processing agent described in embodiment 1 or 2, the above-mentioned organic polysulfide compound (X1) is at least two selected from sulfided triacylglycerol (X1-1), sulfided fatty acid monoester (X1-2), sulfided fatty acid (X1-3), and sulfided olefin (X1-4).

[0023] Regarding embodiment 4, in the synthetic fiber processing agent described in embodiment 3, the above-mentioned organic polysulfide compound (X1) contains at least one selected from the above-mentioned sulfided triacylglycerol (X1-1) having a mass average molecular weight of 1800 or more, the above-mentioned sulfided fatty acid monoester (X1-2) having a mass average molecular weight of 900 or more, the above-mentioned sulfided fatty acid (X1-3) having a mass average molecular weight of 800 or more, and the above-mentioned sulfided olefin (X1-4) having a hydrocarbon group other than a straight-chain primary alkyl group.

[0024] Regarding embodiment 5, in the synthetic fiber processing agent according to any one of embodiments 1 to 4, the synthetic fiber processing agent contains the organic polysulfide compound (X1) at a ratio of 0.001% by mass to 5% by mass.

[0025] In aspect 6, the synthetic fiber processing agent according to any one of aspects 1 to 5 further contains a nonionic surfactant (A).

[0026] According to Embodiment 7, in the synthetic fiber processing agent according to Embodiment 6, the nonionic surfactant (A) further contains the following hydroxy fatty acid derivative (A1).

[0027] Hydroxy fatty acid derivative (A1): A derivative composed of at least one selected from castor oil fatty acid, hydrogenated castor oil fatty acid, ricinoleic acid, 12-hydroxystearic acid, and ester compounds of these fatty acids with polyhydric alcohols, and an alkylene oxide having 2 to 4 carbon atoms.

[0028] Regarding embodiment 8, in the synthetic fiber processing agent according to embodiment 6 or 7, the nonionic surfactant (A) further contains a nitrogen-containing nonionic surfactant (A2).

[0029] In aspect 9, the synthetic fiber processing agent according to any one of aspects 1 to 8 further contains an aromatic antioxidant (B).

[0030] In aspect 10, the synthetic fiber processing agent according to any one of aspects 1 to 9 further comprises a smoothing agent (C), wherein the smoothing agent (C) comprises the following ester compound (C1).

[0031] Ester compound (C1): at least one selected from the group consisting of a complete ester compound (C1-1) of a divalent to 8valent polyol having a chain structure and having 2 to 10 carbon atoms and a monovalent fatty acid having 8 to 24 carbon atoms, and a diester compound (C1-2) of a monovalent alcohol having 8 to 24 carbon atoms and a dibasic acid having 2 to 36 carbon atoms.

[0032] The synthetic fiber of aspect 11 is characterized in that the synthetic fiber treatment agent described in any one of aspects 1 to 10 is adhered thereto.

[0033] Effects of the Invention

[0034] According to the present invention, when a synthetic fiber treatment agent is applied to synthetic fibers for use after being stored for a long period of time, accumulation of tar can be reduced. DETAILED DESCRIPTION

[0035] <First embodiment>

[0036] The following describes a first embodiment of the synthetic fiber treatment agent of the present invention (hereinafter also referred to as the treatment agent). The treatment agent of this embodiment contains an organic sulfur compound (X) including a predetermined organic polysulfide compound (X1) and an ionic surfactant (Y) including a predetermined organic sulfonic acid compound (Y1). The treatment agent may further contain at least one of a nonionic surfactant (A), an aromatic antioxidant (B), and a smoothing agent (C).

[0037] (Organosulfur compound (X))

[0038] The organic sulfur compound (X) used in the treatment agent of this embodiment includes the following organic polysulfide compound (X1). The organic polysulfide compound (X1) is at least one selected from the group consisting of sulfurized triacylglycerol (X1-1), sulfurized fatty acid monoester (X1-2), sulfurized fatty acid (X1-3), and sulfurized olefin (X1-4).

[0039] The organic polysulfide compound (X1) is preferably at least one selected from the group consisting of the aforementioned sulfided triacylglycerol (X1-1) having a mass average molecular weight of 1800 or greater, the aforementioned sulfided fatty acid monoester (X1-2) having a mass average molecular weight of 900 or greater, the aforementioned sulfided fatty acid (X1-3) having a mass average molecular weight of 800 or greater, and the aforementioned sulfided olefin (X1-4) having a hydrocarbon group other than a linear primary alkyl group. The use of this compound can further reduce the accumulation of tar when the treatment agent is applied to synthetic fibers for use after long-term storage.

[0040] Examples of the compound having a hydrocarbon group other than a linear primary alkyl group among the sulfided olefins (X1-4) include compounds having a linear or branched secondary alkyl group, a linear or branched tertiary alkyl group, a branched primary alkyl group, and the like in the molecule.

[0041] In addition, the mass average molecular weight of each organic polysulfide compound can be measured using gel permeation chromatography (GPC).

[0042] The organic polysulfide compound (X1) preferably contains at least two selected from the group consisting of sulfonated triglycerides (X1-1), sulfonated fatty acid monoesters (X1-2), sulfonated fatty acids (X1-3), and sulfonated olefins (X1-4). This configuration can further suppress the increase in tension of the fiber to which the treatment agent is applied. In this configuration, it is even more preferred that the organic polysulfide compound (X1) contains at least one selected from the group consisting of the sulfonated triglycerides (X1-1) having a mass average molecular weight of 1800 or greater, the sulfonated fatty acid monoesters (X1-2) having a mass average molecular weight of 900 or greater, the sulfonated fatty acids (X1-3) having a mass average molecular weight of 800 or greater, and the sulfonated olefins (X1-4) having a hydrocarbon group other than a linear primary alkyl group. By using this compound, when the treatment agent is applied to synthetic fibers for use after long-term storage, the accumulation of tar can be further reduced.

[0043] As the organic polysulfide compound (X1), a commercially available product can be used. Specific examples of the sulfurized triacylglycerol (X1-1) include DAILUBE S-220, DAILUBE S-290, DAILUBE S-225, DAILUBE S-285, DAILUBE GS-110, DAILUBE GS-150HF, DAILUBE GS-225, and DAILUBE FS-150 manufactured by DIC Corporation.

[0044] Specific examples of the sulfurized fatty acid monoester (X1-2) include DAILUBE GS-230S manufactured by DIC Corporation.

[0045] Specific examples of the sulfurized fatty acid (X1-3) include DAILUBE GS-520 and DAILUBE GS-550 manufactured by DIC Corporation.

[0046] Specific examples of the sulfided olefin (X1-4) include DAILUBE IS-30, DAILUBE GS-420, and DAILUBE GS-450 manufactured by DIC Corporation and TPS20 manufactured by Arkema Corporation.

[0047] Examples of commercially available mixtures of sulfurized triacylglycerol (X1-1) and sulfurized olefins (X1-4) include DAILUBE GS-320, DAILUBE GS-330, DAILUBE GS-325, DAILUBE DL-2120, DAILUBE DL-2025, and DAILUBE DL-1028 manufactured by DIC Corporation, and NA-LUBE EP-5415 and NA-LUBE EP-5425 manufactured by King Industries.

[0048] Examples of commercially available mixtures of sulfurized triacylglycerol (X1-1) and sulfurized fatty acid monoesters (X1-2) include DAILUBE GS-210, DAILUBE GS-240, and DAILUBE GS-245 manufactured by DIC Corporation, and NA-LUBE EP-5310 and NA-LUBE EP-5316 manufactured by King Industries.

[0049] As the organic sulfur compound (X), an organic sulfur compound other than the organic polysulfide compound (X1) may be used in combination. Examples of organic sulfur compounds other than the organic polysulfide compound (X1) include compounds having a thioether bond. Examples of compounds having a thioether bond include thiodipropionate. It should be noted that compounds having a sulfonic acid group and sulfate compounds are included in the ionic surfactant (Y).

[0050] Specific examples of the organic sulfur compounds other than the organic polysulfide compound (X1) include di(2-octyldecyl) dithiodipropionate, diisostearyl thiodipropionate, trimethylolpropane tridecylthiopropionate, zinc dialkyl dithiophosphate, and bis[2-methyl-4-(3-n-laurylthiopropionyloxy)-5-tert-butylphenyl] sulfide.

[0051] These organic sulfur compounds (X) may be used alone or in appropriate combination of two or more.

[0052] The lower limit of the content of the organic polysulfide compound (X1) in the treatment agent is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and even more preferably 0.1% by mass or more. The upper limit of the content of the organic polysulfide compound (X1) is preferably 10% by mass or less, more preferably 5% by mass or less. By specifying the content within this range, the effects of the present invention can be further enhanced. In addition, the cleaning properties of tar accumulated on rollers, etc. can be improved. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0053] The lower limit of the sulfur concentration derived from the organic polysulfide compound (X1) in the treatment agent is preferably 100 ppm or more, more preferably 500 ppm or more, and even more preferably 1000 ppm or more. The upper limit of the sulfur concentration derived from the organic polysulfide compound (X1) is preferably 20,000 ppm or less, more preferably 10,000 ppm or less, and even more preferably 5,000 ppm or less. By specifying the content ratio within this range, the effects of the present invention can be further enhanced. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0054] The lower limit of the content of the organosulfur compound (X) in the treatment agent is preferably 1% by mass or more, more preferably 3% by mass or more. The upper limit of the content of the organosulfur compound (X) is preferably 15% by mass or less, more preferably 11% by mass or less. By specifying the content within this range, the effects of the present invention can be further enhanced. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0055] (Ionic surfactant (Y))

[0056] The ionic surfactant (Y) used in the treatment agent of the present embodiment is composed of an organic sulfonic acid compound (Y1) having no carbonyl group in its molecule.

[0057] Examples of the organic sulfonic acid compound (Y1) include aliphatic organic sulfonic acids such as alkanesulfonic acid, olefinsulfonic acid, and hydroxyalkanesulfonic acid, aromatic organic sulfonic acids such as diphenyl ethersulfonic acid and alkylarylsulfonic acid, and salts thereof. When the organic sulfonic acid compound contains a hydrocarbon group, the hydrocarbon may be linear or branched, and may be a saturated or unsaturated hydrocarbon. Among these, aliphatic organic sulfonic acids are preferred.

[0058] Examples of the salt constituting the organic sulfonic acid compound (Y1) include metal salts, ammonium salts, phosphonium salts, and organic amine salts.

[0059] Examples of the metal salt include alkali metal salts and alkaline earth metal salts. Specific examples of the alkali metal constituting the alkali metal salt include sodium, potassium, and lithium. Examples of the alkaline earth metal constituting the alkaline earth metal salt include metals belonging to Group 2 elements, such as calcium, magnesium, beryllium, strontium, and barium.

[0060] Specific examples of the phosphonium constituting the phosphonium salt include quaternary phosphoniums such as tetramethylphosphonium, tetraethylphosphonium, tetrabutylphosphonium, tetraoctylphosphonium, dibutyldihexylphosphonium, trihexyltetradecylphosphonium, triethyloctylphosphonium, trioctylmethylphosphonium, and triphenylmethylphosphonium.

[0061] The amine constituting the organic amine salt may be any of a primary amine, a secondary amine, and a tertiary amine. Specific examples of amines constituting amine salts include: (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, N,N-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, laurylamine, stearylamine, and dimethyllaurylamine; (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and derivatives thereof; (3) alkanolamines such as monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyldiethanolamine, octyldiethanolamine, and lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; (5) polyoxyalkylene alkylaminoethers such as polyoxyethylene laurylaminoether and polyoxyethylene stearylaminoether; and the like.

[0062] Specific examples of the aliphatic organic sulfonic acid include heptanesulfonic acid, 2-ethylhexanesulfonic acid, octanesulfonic acid, nonanesulfonic acid, decanesulfonic acid, undecanesulfonic acid, dodecanesulfonic acid, tridecanesulfonic acid, tetradecanesulfonic acid, pentadecanesulfonic acid, hexadecanesulfonic acid, heptadecanesulfonic acid, octadecanesulfonic acid, isooctanesulfonic acid, isodecanesulfonic acid, isoundecanesulfonic acid, isododecanesulfonic acid, isotridecanesulfonic acid, isotetradecanesulfonic acid, isopentadecanesulfonic acid, isohexadecanesulfonic acid, isoheptadecanesulfonic acid, isooctadecanesulfonic acid, α-olefinsulfonic acid, alkyl (a mixture of 13 to 17 carbon atoms)sulfonic acid, secondary alkane (14 to 18 carbon atoms)sulfonic acid, secondary alkyl (13 to 15 carbon atoms)sulfonic acid, hexadecenesulfonic acid, 3'-dithiobis(1-propanesulfonic acid), and salts thereof.

[0063] Specific examples of the aromatic organic sulfonic acid include p-toluenesulfonic acid, ethylbenzenesulfonic acid, decylbenzenesulfonic acid, undecylbenzenesulfonic acid, dodecylbenzenesulfonic acid, tridecylbenzenesulfonic acid, tetradecylbenzenesulfonic acid, pentadecylbenzenesulfonic acid, hexadecylbenzenesulfonic acid, dibutylnaphthalenesulfonic acid, hexadecyldiphenyletherdisulfonic acid, and salts thereof.

[0064] The organic sulfonic acid compound (Y1) does not have a carbonyl group in its molecule. However, in the present invention, an organic sulfonic acid compound having a carbonyl group may be used in combination.

[0065] Examples of the organic sulfonic acid compound having a carbonyl group include alkylsulfonated succinic acid. Specific examples of the alkylsulfonated succinic acid include dioctylsulfonated succinic acid, dibutylsulfonated succinic acid, dilaurylsulfonated succinic acid, polyoxyethylene lauryl ethersulfonated succinic acid, di(2-ethylhexyl)sulfonated succinic acid, dinonylsulfonated succinic acid, dihexadecylsulfonated succinic acid, diisobutylsulfonated succinic acid, and salts thereof. In order to effectively achieve the effects of the present invention, the amount of the organic sulfonic acid compound having a carbonyl group is preferably 200 parts by mass or less, more preferably 50 parts by mass or less, relative to 100 parts by mass of the organic sulfonic acid compound (Y1).

[0066] The lower limit of the content of the organic sulfonic acid compound (Y1) in the treatment agent is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. The upper limit of the content of the organic sulfonic acid compound (Y1) is preferably 5% by mass or less, more preferably 4% by mass or less. By specifying the content within this range, the effects of the present invention can be further enhanced. It should be noted that a range formed by arbitrarily combining the above upper and lower limits is also conceivable.

[0067] As the ionic surfactant (Y), other ionic surfactants other than the above-mentioned organic sulfonic acid compound (Y1) may be used.

[0068] As other ionic surfactants, known surfactants can be appropriately adopted. Examples of the ionic surfactants include anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0069] As the anionic surfactant, a known substance can be appropriately used. Specific examples of the anionic surfactant include: (1) phosphate salts of fatty alcohols such as lauryl phosphate, cetyl phosphate, octyl phosphate, 2-ethylhexyl phosphate, oleyl phosphate, stearyl phosphate, isostearyl phosphate, and isocetyl phosphate; (2) phosphate salts of substances obtained by adding at least one alkylene oxide selected from ethylene oxide and propylene oxide to a fatty alcohol such as polyoxyethylene lauryl ether phosphate and polyoxyethylene stearyl ether phosphate; (3) sulfate salts of fatty alcohols such as lauryl sulfate, oleyl sulfate, and stearyl sulfate; (4) sulfate salts of polyoxyethylene lauryl ether, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, polyoxyethylene oil (5) Sulfates of fatty acids of natural origin such as castor oil fatty acid sulfates, sesame oil fatty acid sulfates, tall oil fatty acid sulfates, soybean oil fatty acid sulfates, rapeseed oil fatty acid sulfates, and palm oil fatty acid sulfates; (6) Sulfates of natural oils and fats such as castor oil sulfates, sesame oil sulfates, tall oil sulfates, soybean oil sulfates, rapeseed oil sulfates, and palm oil sulfates; (7) Fatty acid salts such as 2-ethylhexanoate, laurate, oleate, stearate, and ricinoleate; and (8) N-acyl sarcosinates such as oleoyl sarcosinate. Examples of the counter ion of the anionic surfactant include alkali metal salts such as potassium salts and sodium salts, ammonium salts, phosphonium salts, triethanolamine salts, (poly)oxyalkylene alkylaminoether salts, and alkanolamine salts such as dibutylethanolamine salts.

[0070] In the treatment agent, the lower limit of the content of organic phosphate compounds such as the above-mentioned (1) phosphate salts of aliphatic alcohols and the above-mentioned (2) phosphate salts of substances formed by addition of alkylene oxide is preferably 0.001% by mass or more. By setting this content to 0.001% by mass or more, the increase in the tension of the fiber to which the treatment agent is applied can be further suppressed. The upper limit of this content is preferably 2% by mass or less, more preferably 1% by mass or less, and further preferably 0.5% by mass or less. By setting it within this range, the accumulation of tar attached to rollers, etc. during the use of the treatment agent can be reduced, especially even when the treatment agent is applied to synthetic fibers after long-term storage, the accumulation of tar can be reduced. In addition, the cleaning properties of the accumulated tar can be improved.

[0071] Specific examples of the cationic surfactant include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, and didecyldimethylammonium chloride.

[0072] Specific examples of the amphoteric surfactant include betaine-type amphoteric surfactants, etc. These ionic surfactants (Y) may be used alone or in appropriate combinations of two or more.

[0073] In the treatment agent, the lower limit of the content of the ionic surfactant (Y) is preferably 0.5% by mass or more, more preferably 0.6% by mass or more. The upper limit of the content of the ionic surfactant (Y) is preferably 10% by mass or less, more preferably 7% by mass or less. By specifying this range of content, the effect of the present invention can be further enhanced. It should be noted that a range formed by arbitrarily combining the above upper and lower limits can also be envisioned.

[0074] (Nonionic surfactant (A))

[0075] The treatment agent of this embodiment can be mixed with a nonionic surfactant (A). By using a nonionic surfactant (A), the stability of the treatment agent can be improved and the effect of the present invention can be further improved. As the nonionic surfactant (A) provided in the treatment agent of this embodiment, a well-known substance can be appropriately adopted. The nonionic surfactant (A) preferably includes a hydroxy fatty acid derivative (A1) shown below. By making the treatment agent include a hydroxy fatty acid derivative (A1), the increase in the tension of the fiber to which the treatment agent is applied can be suppressed. In addition, the nonionic surfactant (A) preferably includes a nitrogen-containing nonionic surfactant (A2). By making the treatment agent include a nitrogen-containing nonionic surfactant (A2), the accumulation of tar attached to the roller, etc. when the treatment agent is used can be reduced.

[0076] Examples of the hydroxy fatty acid derivative (A1) include derivatives formed from at least one selected from castor oil fatty acid, hydrogenated castor oil fatty acid, ricinoleic acid, 12-hydroxystearic acid, and ester compounds of these fatty acids with polyhydric alcohols, and an alkylene oxide having 2 to 4 carbon atoms.

[0077] Specific examples of the polyol constituting the hydroxy fatty acid derivative (A1) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerol, diglycerol, 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, pentaerythritol, and sorbitol.

[0078] As specific examples of alkylene oxides having 2 or more and 4 or less carbon atoms constituting the hydroxy fatty acid derivative (A1), for example, ethylene oxide, propylene oxide, butylene oxide, etc. can be cited. The hydroxy fatty acid derivative (A1) is formed by adding a predetermined number of moles of alkylene oxide to castor oil fatty acid, etc. The number of moles of alkylene oxide added can be appropriately set, preferably 0.1 or more and 250 or less moles, more preferably 1 or more and 200 or less moles, further preferably 2 or more and 150 or less moles, and particularly preferably 3 or more and 40 or less moles. It is also possible to envision a range in which the above upper and lower limits are arbitrarily combined. It should be noted that the number of moles of alkylene oxide added represents the number of moles of alkylene oxide relative to 1 mole of the addition target compound in the input raw material. Alkylene oxide can be used alone as one alkylene oxide, or two or more alkylene oxides can be used in appropriate combination. When two or more alkylene oxides are used, their addition method may be any of block addition, random addition, and a combination of block addition and random addition, without particular limitation.

[0079] Specific examples of the hydroxy fatty acid derivative (A1) include compounds obtained by adding alkylene oxide to hydrogenated castor oil, compounds obtained by esterifying a substance obtained by adding alkylene oxide to hydrogenated castor oil with a fatty acid, and compounds obtained by cross-linking a substance obtained by adding alkylene oxide to hydrogenated castor oil with a dibasic acid and further esterifying it with a fatty acid.

[0080] Examples of the nitrogen-containing nonionic surfactant (A2) include compounds having a (poly)oxyalkylene structure obtained by adding an alkylene oxide to an amine compound, amide compounds obtained by condensing an amine compound with a carboxylic acid, and compounds having a (poly)oxyalkylene structure obtained by adding an alkylene oxide to a fatty acid amide. Among these, compounds having a (poly)oxyalkylene structure obtained by adding an alkylene oxide to an organic primary amine as an amine compound are preferred.

[0081] Specific examples of the amine compound used as a raw material for the nitrogen-containing nonionic surfactant (A2) include aliphatic amines such as methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine (stearylamine), octadecenylamine, and coconut amine.

[0082] Specific examples of the alkylene oxide used as a raw material for forming the (poly)oxyalkylene structure of the nitrogen-containing nonionic surfactant (A2) are the same as the specific examples of the alkylene oxide explained as a raw material for the hydroxy fatty acid derivative (A1).

[0083] Specific examples of carboxylic acids used as raw materials for the nitrogen-containing nonionic surfactant (A2) include: (1) linear alkyl carboxylic acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, and docosanoic acid; (2) 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 ricinoleic acid; and the like.

[0084] Specific examples of the fatty amide used as a raw material for the nitrogen-containing nonionic surfactant (A2) include caprylamide, laurylamide, palmitamide, stearylamide, oleylamide, behenylamide, lignoceramide, amides of fatty acids and diethanolamine, and amides of fatty acids and vinylamine.

[0085] Specific examples of the nitrogen-containing nonionic surfactant (A2) include a compound obtained by adding an alkylene oxide to laurylamine, a compound obtained by adding an alkylene oxide to stearylamine, and oleic acid diethanolamide.

[0086] As the nonionic surfactant (A), other nonionic surfactants other than the above-mentioned hydroxy fatty acid derivatives (A1) and nitrogen-containing nonionic surfactants (A2) may also be used.

[0087] Examples of other nonionic surfactants include compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to alcohols or carboxylic acids, ether-ester compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to ester compounds of carboxylic acids and polyols, partial ester compounds of carboxylic acids and polyols, and compounds having a polyoxyalkylene structure such as block copolymers having a polyoxyethylene chain and a polyoxypropylene chain.

[0088] Specific examples of alcohols used as raw materials for nonionic surfactants include: (1) straight-chain 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) isopropyl alcohol, isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isotridecanol, isotetradecanol, isotriacontanol, (i) branched-chain alkyl alcohols such as isohexadecanol, isoheptadecanol, isooctadecanol, isonadecanol, isoeicosanol, isohexadecanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexadecanol, isohexadecanol, isohexacosanol, isoctacosanol, isononadecanol, and isopentacosanol; (ii) straight-chain alkenyl alcohols such as tetradecenol, hexadecanol, heptadecanol, octadecanol, and nonadecanol; (iii) branched-chain alkenyl alcohols such as isohexadecanol and isooctadecanol; (iv) cyclic alkyl alcohols such as cyclopentanol and cyclohexanol; (v) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol, and tristyrenated phenol; and the like.

[0089] Specific examples of the carboxylic acids used as the raw material of the nonionic surfactant are the same as the specific examples of the carboxylic acids described as the raw material of the nitrogen-containing nonionic surfactant (A2).

[0090] Specific examples of the alkylene oxide used as a raw material for forming the (poly)oxyalkylene structure of the nonionic surfactant are the same as the specific examples of the alkylene oxide explained as a raw material for the hydroxy fatty acid derivative (A1).

[0091] Specific examples of the polyol used as a raw material for the nonionic surfactant are the same as the specific examples of the polyol described as a raw material for the hydroxy fatty acid derivative (A1).

[0092] Specific examples of the ester compounds of carboxylic acids and polyols used as raw materials for nonionic surfactants include synthetic esters such as sorbitan monooleate, sorbitan dioleate, sorbitan trioleate, glycerol dioleate, and sucrose fatty acid esters; natural oils and fats such as coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, palm oil, and fish oil; and derivatives thereof.

[0093] As the compound with polyoxyalkylene structure, for example, a block copolymer with a polyoxyethylene chain and a polyoxypropylene chain can be cited. As long as the block copolymer has a low hydrophilic polyoxypropylene chain and a high hydrophilic polyoxyethylene chain and has a surface active effect, there is no particular limitation. The number of polyoxyethylene chains and polyoxypropylene chains in the molecule is not particularly limited. For example, it can be a block copolymer comprising 1 polyoxypropylene chain and 1 polyoxyethylene chain, or it can be a poloxamer surfactant comprising a polyoxypropylene chain and 2 polyoxyethylene chains clamping the polyoxypropylene chain. In addition, it can also be an ether compound formed by adding a polyoxyethylene chain and a polyoxypropylene chain to a polyol.

[0094] Specific examples of other nonionic surfactants include compounds obtained by adding alkylene oxide to oleyl alcohol, compounds obtained by adding alkylene oxide to isotridecanol, sorbitan monooleate, sorbitan trioleate, trimethylolpropane dioleate, glycerol dioleate, and diesters of polyethylene glycol and oleic acid.

[0095] These nonionic surfactants (A) may be used alone or in appropriate combination of two or more.

[0096] The lower limit of the content of the hydroxy fatty acid derivative (A1) in the treatment agent is preferably 5% by mass or more, more preferably 10% by mass or more. The upper limit of the content of the hydroxy fatty acid derivative (A1) is preferably 40% by mass or less, more preferably 30% by mass or less. By specifying this content range, the increase in tension of the fiber treated with the treatment agent can be suppressed. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0097] In the treatment agent, the lower limit of the content of the nitrogen-containing nonionic surfactant (A2) is preferably 1% by mass or more, more preferably 2% by mass or more. The upper limit of the content of the nitrogen-containing nonionic surfactant (A2) is preferably 15% by mass or less, more preferably 12% by mass or less. By specifying this content range, the effects of the present invention can be further enhanced. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0098] In the treatment agent, the lower limit of the content of the nonionic surfactant (A) is preferably 20% by mass or more, more preferably 25% by mass or more. The upper limit of the content of the nonionic surfactant (A) is preferably 70% by mass or less, more preferably 60% by mass or less. By specifying this content range, the treatment agent can be given stability and the effects of the present invention can be further enhanced. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits can also be envisioned.

[0099] (Aromatic antioxidant (B))

[0100] The treatment agent of this embodiment may be mixed with an aromatic antioxidant (B). The aromatic antioxidant (B) can improve the cleanability of tar adhering to rollers, etc. during use of the treatment agent. As the aromatic antioxidant (B) provided in this embodiment, known substances can be appropriately used. Examples of the aromatic antioxidant (B) include phenolic antioxidants, phosphite antioxidants having an aromatic ring, amine antioxidants, and organic sulfur antioxidants.

[0101] Specific examples of the aromatic antioxidant (B) include: (1) 4,4'-butylenebis(6-tert-butyl-m-cresol), 1,3,5-tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)-s-triazine-2,4,6-(1H,3H,5H)trione, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 1,3,5-trimethyl-2,4,6 -Tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,2'-methylene-bis(4-methyl-6-tert-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, tetrakis[methylene-3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]methane and other phenolic antioxidants; (2) tris(2,4-di-tert-butylphenyl) phosphite, octyl diphenyl phosphite, phosphorous acid Phosphite antioxidants such as trinonylphenyl ester and tetra(tridecyl)-4,4'-butylene-bis-(2-tert-butyl-5-methylphenol) diphosphite; (3) monoalkyl diphenylamine compounds such as monooctyl diphenylamine and monononyl diphenylamine; 4,4'-dibutyl diphenylamine, 4,4'-dipentyl diphenylamine, 4,4'-dihexyl diphenylamine, 4,4'-diheptyl diphenylamine, 4,4'-dioctyl diphenylamine, 4,4'-diphenylamine Amine antioxidants such as dialkyldiphenylamine compounds such as nonyldiphenylamine and N-dinonyldiphenylamine; polyalkyldiphenylamine compounds such as tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, and tetranonyldiphenylamine; (4) sulfur antioxidants such as 4,4'-thiobis-(6-tert-butyl-3-methylphenol) and 6-(4-hydroxy-3,5-di-tert-butylanilino)-2,4-bis(octylthio)-1,3,5-triazine; etc.

[0102] These aromatic antioxidants (B) may be used alone or in combination of two or more.

[0103] The lower limit of the content of the aromatic antioxidant (B) in the treatment agent is preferably 0.1% by mass or more, more preferably 0.2% by mass or more. The upper limit of the content of the aromatic antioxidant (B) is preferably 5% by mass or less, more preferably 2% by mass or less. By specifying this content range, the effects of the present invention can be further enhanced. It should be noted that ranges formed by arbitrarily combining the above upper and lower limits are also conceivable.

[0104] (Smoothing agent (C))

[0105] The treatment agent of this embodiment may contain a smoothing agent (C). By containing a smoothing agent (C), the smoothness of the synthetic fiber to which the treatment agent is applied can be improved. The smoothing agent (C) contains the following ester compound (C1).

[0106] The ester compound (C1) includes at least one selected from a complete ester compound (C1-1) of a divalent to 8valent polyol having a chain structure and having 2 to 10 carbon atoms and a monovalent fatty acid having 8 to 24 carbon atoms, and a diester compound (C1-2) of a monovalent alcohol having 8 to 24 carbon atoms and a dibasic acid having 2 to 36 carbon atoms.

[0107] The divalent to 8valent polyol having a chain structure and having 2 to 10 carbon atoms constituting the complete ester compound (C1-1) may be a linear or branched polyol.

[0108] Specific examples of the polyol include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerol, diglycerol, 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, pentaerythritol, and sorbitol.

[0109] As the monobasic fatty acid with a carbon number of 8 or more and 24 or less constituting the complete ester compound (C1-1), it can be a straight-chain substance or a substance with a branched structure. In addition, it can be a saturated fatty acid or an unsaturated fatty acid. As a specific example of a monobasic saturated fatty acid, for example, octyl 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), behenic acid (behenic acid), tetracosanoic acid, etc. can be mentioned. As a specific example of a monobasic unsaturated fatty acid, for example, myristoleic acid, palmitoleic acid, oleic acid, vaccenic acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, arachidonic acid, etc. can be mentioned.

[0110] Specific examples of the complete ester compound (C1-1) include vegetable oils such as rapeseed oil and palm oil, trimethylolpropane esters such as triolein and trimethylolpropane trioleate, and pentaerythritol esters such as pentaerythritol myristate.

[0111] The monohydric alcohol having 8 to 24 carbon atoms constituting the diester compound (C1-2) may be a linear alcohol or a branched alcohol, and may be a saturated alcohol or an unsaturated alcohol.

[0112] Specific examples of monohydric alcohols include: (1) linear alkyl alcohols such as octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, and tetracosanol; (2) 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isotriacontanol, isopentacontanol, and isohexadecanol. , isoheptadecanol, isooctadecanol, isonadecanol, isoeicosanol, isohexadecanol, isodocosanol, isotricosanol, isotetracosanol and other branched alkyl alcohols; (3) tetradecenol, hexadecenol, heptadecenol, octadecenol, oleyl alcohol, nonadecenol and other straight-chain alkenyl alcohols; (4) isohexadecenol, isooctadecenol and other branched alkenyl alcohols; (5) cyclic alkyl alcohols; (6) aromatic alcohols such as monostyrenated phenol, distyrenated phenol, tristyrenated phenol and the like; etc.

[0113] Specific examples of the dibasic acid having 2 or more and 36 or less carbon atoms constituting the diester compound (C1-2) include: (1) dibasic acids such as oxalic acid, malonic acid, succinic acid, fumaric acid, maleic acid, adipic acid, and sebacic acid; (2) aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid; and the like.

[0114] Specific examples of the diester compound (C1-2) include didodecyl adipate, diisostearyl adipate, dioleyl adipate, dioleyl azelate, bis(2-ethylhexyl) phthalate, and diisostearyl isophthalate.

[0115] As the smoothing agent (C), ester compounds other than the ester compound (C1) may also be used. There are no particular limitations on the ester compound other than the ester compound (C1), and examples thereof include ester compounds produced from fatty acids having an odd or even number of hydrocarbon groups and alcohols, as described below.

[0116] The fatty acid used as a raw material for the ester compound is not particularly limited in terms of its carbon number, presence or absence of branches, or number of valences. For example, it may be a higher fatty acid, a fatty acid having a cyclocyclic ring, or a fatty acid having an aromatic ring. The alcohol used as a raw material for the ester compound is not particularly limited in terms of its carbon number, presence or absence of branches, or number of valences. For example, it may be a higher alcohol, an alcohol having a cyclocyclic ring, or an alcohol having an aromatic ring.

[0117] Specific examples of other ester compounds include: (1) ester compounds of aliphatic monohydric alcohols such as octyl palmitate, oleyl laurate, oleyl oleate, isotridecyl stearate, isocosanyl oleate, and isostearyl erucate, and aliphatic monocarboxylic acids; (2) ester compounds of aromatic monohydric alcohols such as benzyl oleate and benzyl laurate, and aliphatic monocarboxylic acids; (3) complete ester compounds of aromatic polyhydric alcohols such as bisphenol A dilaurate, and aliphatic monocarboxylic acids; (4) complete ester compounds of aliphatic monohydric alcohols such as trioctyl trimellitate, and aromatic polycarboxylic acids; and the like.

[0118] As the lubricant (C), in addition to the above-mentioned ester compounds, mineral oils and the like can also be used. Examples of mineral oils include aromatic hydrocarbons, paraffinic hydrocarbons, and cycloparaffinic hydrocarbons. More specifically, examples include spindle oil and liquid paraffin. These mineral oils can be appropriately commercially available.

[0119] These smoothing agents (C) may be used alone or in combination of two or more.

[0120] The lower limit of the content of the ester compound (C1) in the treatment agent is preferably 20% by mass or more, more preferably 30% by mass or more. The upper limit of the content of the ester compound (C1) is preferably 75% by mass or less, more preferably 65% ​​by mass or less. By specifying the content within this range, smoothness can be imparted to the fiber and the effects of the present invention can be further enhanced. It should be noted that any combination of the upper and lower limits described above is also conceivable.

[0121] The lower limit of the content of the smoothing agent (A) in the treatment agent is preferably 20% by mass or more, more preferably 30% by mass or more. The upper limit of the content of the smoothing agent (A) is preferably 80% by mass or less, more preferably 70% by mass or less. By specifying this content range, smoothness can be imparted to the fiber and the effects of the present invention can be further enhanced. It should be noted that any combination of the above upper and lower limits is also conceivable.

[0122] <Second embodiment>

[0123] Next, a second embodiment of the synthetic fiber according to the present invention will be described. The treatment agent of the first embodiment is attached to the synthetic fiber of this embodiment. According to this embodiment, a treated synthetic fiber having a synthetic fiber and a treatment agent attached thereto is provided. When the treatment agent is attached to the synthetic fiber, the treatment agent may be in the form of a diluent diluted with a diluent solvent, such as an organic solvent solution, an aqueous liquid, etc. From the perspective of the adhesion of the treatment agent to the fiber and economic efficiency, hydrocarbons with a carbon number of 10 or more and 15 or less and / or water are preferably used as the diluent solvent. The mixing ratio of the treatment agent and the diluent solvent is preferably the mass of the treatment agent: the mass of the diluent solvent = 99:1 to 10:90. The diluent such as the aqueous liquid is attached to the synthetic fiber in, for example, a spinning or stretching process. The diluent attached to the synthetic fiber can evaporate the diluent solvent through the stretching process and the drying process. There is no particular limitation on the process for attaching the diluent as long as it is a spinning process. By using the invention in a manufacturing equipment or process having a process of passing a roller at a temperature of 150°C or above in the stretching or heat treatment process, the effect of the invention can be expected to be greater.

[0124] Specific examples of synthetic fibers to which the treatment agent of the present embodiment is applied are not particularly limited, and examples thereof include: (1) polyester fibers such as polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins; (2) polyamide fibers such as nylon 6 and nylon 66; (3) polyacrylic acid fibers such as polyacrylic acid and modified acrylic acid; (4) polyolefin fibers such as polyethylene and polypropylene; and the like. Among these, polyester fibers and polyamide fibers are preferably used. The fineness of the synthetic fibers to be produced is not particularly limited, but is preferably 150 dtex or more, more preferably 500 dtex or more, and even more preferably 1000 dtex or more. In addition, the strength of the synthetic fibers to be produced is not particularly limited, but is preferably 5.0 cN / dtex or more, more preferably 6.0 cN / dtex or more, and even more preferably 7.0 cN / dtex or more.

[0125] The proportion of the treatment agent attached to the synthetic fiber is not particularly limited, but it is preferably attached at a ratio of 0.1% to 5% by mass relative to the synthetic fiber (excluding solvents such as water). This configuration further enhances the effects of the present invention. The method for attaching the treatment agent is not particularly limited; for example, well-known methods such as roller lubrication, guided lubrication using a metering pump, immersion lubrication, and spray lubrication can be employed.

[0126] In the present invention, the use of the synthetic fiber is not particularly limited, but synthetic fibers for industrial materials are preferred. For example, more preferred are synthetic fibers used in the fields of automobiles, construction, commerce, agriculture, aquaculture, civil engineering, and the like, such as fibers for air bags, fibers for seat belts, fibers for tire cords, fibers for carpets, fibers for tents, fibers for advertising cloths, fibers for fishing nets, fibers for conveyor belts, and fibers for ropes.

[0127] The effects of the treatment agent and synthetic fiber according to the above-described embodiment will be described.

[0128] (1) The treatment agent of the above embodiment is composed of a mixture of an organic sulfur compound (X) containing the above organic polysulfide compound (X1) and an ionic surfactant (Y) containing the above organic sulfonic acid compound (Y1). Therefore, the increase in the tension of the fiber to which the treatment agent is applied can be suppressed. In addition, the accumulation of tar adhering to rollers, etc. during the use of the treatment agent can be reduced, especially when the treatment agent is applied to synthetic fibers for use after long-term storage. In addition, the washability of the accumulated tar can be improved. Therefore, the treatment agent of the present invention can reduce broken fibers and burrs, and can improve manufacturing efficiency due to good silk-making properties and tar washability.

[0129] It should be noted that the above embodiment can be modified as follows: The above embodiment and the following modifications can be combined and implemented within the scope of no technical contradiction.

[0130] The treatment agent of the above embodiment may be further mixed with components commonly used in treatment agents, such as stabilizers, antistatic agents, linkers, ultraviolet absorbers, defoaming agents, preservatives, and rust inhibitors, during or after the production of the treatment agent, in order to maintain the quality of the treatment agent, within the range that does not hinder the effects of the present invention.

[0131] To improve the appearance stability of the treatment agent during storage, the treatment agent may be premixed with water. In this case, the mixing ratio of the treatment agent to water is preferably 85:15 to 99.9:0.1 (mass of treatment agent):mass of water).

[0132] Example

[0133] Hereinafter, in order to more specifically describe the constitution and effect of the present invention, examples etc. are given, but the present invention is not limited to these examples. It should be noted that, in the description of the following examples and comparative examples, parts refer to parts by mass, and % refers to mass %, unless otherwise stated.

[0134] Test group 1 (preparation of treatment agent)

[0135] (Example 1)

[0136] As shown in Table 1, a treatment agent of Example 1 was prepared, which contained: 30 parts (%) of rapeseed oil (C1-1a) as a smoothing agent (C), 20 parts (%) of trimethylolpropane trioleate (C1-1d), 10 parts (%) of didodecyl adipate (C1-2), 10 parts (%) of a compound (A1-1) obtained by adding 10 mol of ethylene oxide (hereinafter referred to as EO) to 1 mol of hydrogenated castor oil as a nonionic surfactant (A), 5 parts (%) of a compound (A1-2) obtained by esterifying 1 mol of hydrogenated castor oil with 3 mol of oleic acid by adding 20 mol of EO, 3 parts (%) of a compound (A2-1) obtained by adding 3 mol of EO to 1 mol of laurylamine, and 7 parts (%) of a compound (A3-1) obtained by adding 10 mol of EO to 1 mol of oleyl alcohol. Parts (%) of the ingredients are sorbitan trioleate (A3-5) 5 parts (%), glycerol dioleate (A3-7) 4 parts (%), α-olefin (carbon number 14-18) sulfonic acid sodium salt (Y1-1) 1 part (%) as the ionic surfactant (Y), di(2-ethylhexyl) sulfosuccinic acid sodium salt (rY1-1) 0.5 parts (%), phosphate oil ester (Y2-4) 0.2 parts (%), sulfurized oil (sulfurized triacylglycerol) (mass average molecular weight 10000) (X1-1a) 2.5 parts (%) as the organic sulfur compound (X), sulfurized olefin (mass average molecular weight 200) containing a secondary alkyl group (X1-4b) 0.5 parts (%), and tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate (B-1) 1.3 parts (%) as the aromatic antioxidant (B).

[0137] (Examples 2 to 23, Comparative Examples 1 to 8)

[0138] The treatment agents of Examples 2 to 23 and Comparative Examples 1 to 8 were prepared in the same manner as the treatment agent of Example 1, containing a smoothing agent (C), a nonionic surfactant (A), an ionic surfactant (Y), an organic sulfur compound (X), an aromatic antioxidant (B), and other components in the proportions shown in Tables 1 and 2.

[0139] The type and content of the smoothing agent (C), the type and content of the nonionic surfactant (A), the type and content of the ionic surfactant (Y), the type and content of the organic sulfur compound (X), the type and content of the aromatic antioxidant (B), and the type and content of other components are shown in the "Smoothing Agent (C)" column, "Nonionic Surfactant (A)" column, "Ionic Surfactant (Y)" column, "Organic Sulfur Compound (X)" column, "Aromatic Antioxidant (B)" column, and "Other Components" column of Table 1 and Table 2, respectively.

[0140] [Table 1]

[0141]

[0142] [Table 2]

[0143]

[0144] [Table 3]

[0145]

[0146] The details of the smoothing agent (C), nonionic surfactant (A), ionic surfactant (Y), organic sulfur compound (X), aromatic antioxidant (B), and other components described in Tables 1 and 2 are as follows.

[0147] <Smoothing Agent (C)>

[0148] (Ester compound (C1))

[0149] C1-1a: Rapeseed oil

[0150] C1-1b: Palm oil

[0151] C1-1c: triolein

[0152] C1-1d: Trimethylolpropane trioleate

[0153] C1-1e: Pentaerythritol myristate

[0154] C1-2: Didodecyl adipate

[0155] (Other smoothing agents)

[0156] C2-1: Isodecyl oleate

[0157] C2-2: Mineral oil (kinematic viscosity at 40°C: 20 mm 2 / s)

[0158] <Nonionic surfactant (A)>

[0159] (Hydroxy fatty acid derivative (A1))

[0160] A1-1: Compound formed by adding 10 mol of EO to 1 mol of hydrogenated castor oil

[0161] A1-2: Compound obtained by adding 20 mol of EO to 1 mol of hydrogenated castor oil and esterifying it with 3 mol of oleic acid

[0162] A1-3: A compound obtained by adding 25 mol of EO to 1 mol of hydrogenated castor oil, cross-linking with adipic acid, and terminal esterification with stearic acid (mass average molecular weight 5000)

[0163] (Nitrogen-containing nonionic surfactant (A2))

[0164] A2-1: Compound formed by adding 3 moles of EO to 1 mole of laurylamine

[0165] A2-2: Compound formed by adding 10 moles of EO to 1 mole of laurylamine

[0166] A2-3: Compound formed by adding 10 moles of EO to 1 mole of stearylamine

[0167] A2-4: Oleic acid diethanolamide

[0168] (Other nonionic surfactants)

[0169] A3-1: Compound formed by adding 10 moles of EO to 1 mole of oleyl alcohol

[0170] A3-2: Compound formed by adding 10 moles of EO to 1 mole of isotridecanol

[0171] A3-3: Compound formed by random addition of 10 mol of EO and 10 mol of PO (propylene oxide) to 1 mol of isotridecanol

[0172] A3-4: Sorbitan monooleate

[0173] A3-5: Sorbitan trioleate

[0174] A3-6: Trimethylolpropane dioleate

[0175] A3-7: Glyceryl dioleate

[0176] A3-8: Diester of polyethylene glycol (mass average molecular weight 600) and oleic acid

[0177] <Ionic surfactant (Y)>

[0178] (Organic sulfonic acid compound (Y1))

[0179] Y1-1: α-olefin (carbon number 14-18) sulfonic acid sodium salt

[0180] Y1-2: Sodium salt of secondary alkane (carbon number 14-18) sulfonic acid

[0181] rY1-1: di(2-ethylhexyl)sulfosuccinate sodium salt

[0182] (Other ionic surfactants)

[0183] Y2-1: Potassium oleate

[0184] Y2-2: Lauryl sulfate-triethanolamine salt

[0185] Y2-3: Palm oil sulfate-sodium salt

[0186] Y2-4: Oleyl phosphate

[0187] Y2-5: Isohexadecyl phosphate

[0188] Y2-6: Lauryl phosphate-potassium salt

[0189] Y2-7: N-oleoylsarcosine

[0190] <Organic sulfur compound (X)>

[0191] (Organic polysulfide compound (X1))

[0192] X1-1a: Sulfurized oil (sulfurized triacylglycerol) (mass average molecular weight 10,000)

[0193] X1-1z: Sulfurized oil (sulfurized triglyceride) (mass average molecular weight 860)

[0194] X1-2a: Sulfurized fatty acid monoester (mass average molecular weight 1200)

[0195] X1-2z: Sulfurized fatty acid monoester (mass average molecular weight 750)

[0196] X1-3a: Sulfurized fatty acid (mass average molecular weight 900)

[0197] X1-3z: Sulfurized fatty acid (mass average molecular weight 400)

[0198] X1-4a: Sulfurized olefin (mass average molecular weight 700) containing tertiary alkyl

[0199] X1-4b: Sulfurized olefin (mass average molecular weight 200) containing secondary alkyl

[0200] X1-4z: Sulfurized olefin (mass average molecular weight 700) containing a linear primary alkyl group

[0201] X1-5: A mixture of sulfurized oil (mass average molecular weight 6000) and sulfurized olefin (mass average molecular weight 1000, containing tertiary alkyl groups)

[0202] (Other organic sulfur compounds)

[0203] X2-1: Di(2-octyldecyl) dithiodipropionate

[0204] X2-2: Diisostearyl thiodipropionate

[0205] X2-3: Trimethylolpropane tridecylthiopropionate

[0206] X2-4: Zinc dialkyl dithiophosphate

[0207] X2-5: Bis[2-methyl-4-(3-n-laurylthiopropionyloxy)-5-tert-butylphenyl] sulfide

[0208] <Aromatic Antioxidant (B)>

[0209] B-1: Tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate

[0210] B-2: 4,4'-butylenebis(6-tert-butyl-m-cresol)

[0211] B-3: Tris(2,4-di-tert-butylphenyl) phosphite

[0212] <Other ingredients>

[0213] D-1: Dilauryl hydrogen phosphite

[0214] D-2: Ethylene glycol

[0215] D-3: Glycerin

[0216] D-4: Dimethicone

[0217] The mass average molecular weight was measured by gel permeation chromatography using polystyrene as a standard substance.

[0218] Test group 2 (tension increase)

[0219] Each treatment agent just prepared is uniformly diluted with a diluent of ion exchange water or an organic solvent as needed to prepare a 15% dilution. The dilution is applied to an unoiled polyethylene terephthalate fiber of 1100 dtex, 192 filaments, and a characteristic viscosity of 0.93 using an oiling roller oiling method in an amount of 5.0% based on non-volatile components. The dilution is then dried to obtain a test yarn. The test yarn is allowed to travel while in contact with a satin chrome pin with a surface temperature of 250°C under the conditions of an initial tension of 1.5 kg and a yarn speed of 0.1 m / min, and the tension value (initial tension value) of the yarn after contact with the satin chrome pin is measured. The tension value after traveling for 12 hours is measured, and the tension increase rate (%) is calculated using the calculation formula shown below. The tension increase is evaluated according to the following criteria. The results are shown in the "Tension Increase" column of Table 3.

[0220] Tension increase rate (%) = (tension value after 12 hours (kg) - initial tension value (kg)) / initial tension value (kg) × 100

[0221] Evaluation criteria for tension rise

[0222] ○○○ (Excellent): less than 10%

[0223] ○○ (good): 10% or more and less than 20%

[0224] ○ (Qualified): 20% or more and less than 40%

[0225] × (unqualified): more than 40%

[0226] Test group 3 (tar accumulation)

[0227] In the evaluation of tension rise in test group 2, the surface of the satin chrome pins was visually inspected for dirt after 12 hours of travel, and tar accumulation was evaluated according to the following criteria. The results are shown in the "Tar Accumulation" column in Table 3.

[0228] Evaluation criteria for tar accumulation

[0229] ○○○ (Excellent): No dirt

[0230] ○○ (good): There is almost no dirt

[0231] ○ (Pass): When there is little dirt

[0232] × (unacceptable): There is a lot of dirt

[0233] Test Group 4 (Tar Cleaning)

[0234] In the evaluation of tension rise in Test Group 2, after 12 hours of travel, dirt formed on the satin chrome pin was wiped off at 150°C using a cotton swab soaked in 5% sodium hydroxide glycerin solution. Cleanability was evaluated according to the following criteria. The results are shown in the "Tar Cleaning" column in Table 3.

[0235] Evaluation criteria for tar cleaning

[0236] ○○○ (Excellent): Dirt can be wiped off with less than 10 wipes

[0237] ○○ (good): The dirt can be wiped off by wiping 10 times or more and less than 50 times

[0238] ○ (pass): The dirt can be wiped off by wiping 50 times or more and less than 100 times

[0239] × (Unqualified): Dirt cannot be wiped off even after using the wiping solution more than 100 times

[0240] Test group 5 (tar after long-term storage)

[0241] Each freshly prepared treatment agent was stored in a sealed container at 60°C for three weeks. It was then uniformly diluted with ion-exchanged water or an organic solvent to prepare a 15% dilution. The dilution was applied to unoiled polyethylene terephthalate fibers (1100 dtex, 192 filaments, and an intrinsic viscosity of 0.93) using an oiling roller method at a rate of 5.0% based on non-volatile content. The dilution was then dried to obtain a test yarn. The test yarn was run under an initial tension of 1.5 kg and a yarn speed of 0.1 m / min while in contact with a satin-finished chrome pin with a surface temperature of 250°C. After running for 12 hours, the surface dirt on the satin-finished chrome pin was visually observed, and the accumulation of tar when the treatment agent was applied to synthetic fibers after long-term storage was evaluated according to the following criteria. The results are shown in the "Tar after Long-Term Storage" column in Table 3.

[0242] Evaluation criteria for tar after long-term storage

[0243] ○○○ (Excellent): No dirt

[0244] ○○ (good): There is almost no dirt

[0245] ○ (Pass): When there is little dirt

[0246] × (unacceptable): There is a lot of dirt

[0247] As can be seen from the results in Table 3, the treatment agents in each example all scored above acceptable in terms of tension increase, tar accumulation, tar cleaning, and tar after long-term storage. According to the present invention, it is possible to suppress the increase in tension of fibers treated with the treatment agent. Furthermore, it is possible to reduce the accumulation of tar adhering to rollers, etc., during the use of the treatment agent. This is particularly true when the treatment agent is applied to synthetic fibers after long-term storage. Furthermore, it is possible to improve the cleaning properties of accumulated tar.

Claims

1. A treatment agent for synthetic fibers, characterized in that: It contains an organic sulfur compound (X) including the following organic polysulfide compound (X1), and an ionic surfactant (Y) including the following organic sulfonic acid compound (Y1), Organic polysulfide compound (X1): at least one selected from the group consisting of sulfided triacylglycerol (X1-1), sulfided fatty acid monoester (X1-2), sulfided fatty acid (X1-3), and sulfided olefin (X1-4), Organic sulfonic acid compound (Y1): an organic sulfonic acid compound having no carbonyl group in the molecule.

2. The synthetic fiber processing agent according to claim 1, wherein The organic polysulfide compound (X1) is at least one selected from the following compounds: The sulfurized triacylglycerol (X1-1) having a mass average molecular weight of 1800 or more, The sulfurized fatty acid monoester (X1-2) having a mass average molecular weight of 900 or more, The sulfurized fatty acid (X1-3) having a mass average molecular weight of 800 or more, and The sulfided olefin (X1-4) having a hydrocarbon group other than a linear primary alkyl group.

3. The synthetic fiber processing agent according to claim 1, wherein The organic polysulfide compound (X1) is at least two selected from the group consisting of sulfided triacylglycerol (X1-1), sulfided fatty acid monoester (X1-2), sulfided fatty acid (X1-3), and sulfided olefin (X1-4).

4. The synthetic fiber processing agent according to claim 3, wherein The organic polysulfide compound (X1) comprises at least one selected from the following compounds: The sulfurized triacylglycerol (X1-1) having a mass average molecular weight of 1800 or more, The sulfurized fatty acid monoester (X1-2) having a mass average molecular weight of 900 or more, The sulfurized fatty acid (X1-3) having a mass average molecular weight of 800 or more, and The sulfided olefin (X1-4) having a hydrocarbon group other than a linear primary alkyl group.

5. The synthetic fiber processing agent according to claim 1, wherein The synthetic fiber processing agent contains the organic polysulfide compound (X1) in a ratio of 0.001% by mass to 5% by mass. The synthetic fiber processing agent according to claim 1 , further comprising a nonionic surfactant (A).

7. The synthetic fiber processing agent according to claim 6, wherein The nonionic surfactant (A) further comprises the following hydroxy fatty acid derivative (A1), Hydroxy fatty acid derivative (A1): A derivative composed of at least one selected from castor oil fatty acid, hydrogenated castor oil fatty acid, ricinoleic acid, 12-hydroxystearic acid, and ester compounds of these fatty acids with polyhydric alcohols, and an alkylene oxide having 2 to 4 carbon atoms.

8. The synthetic fiber processing agent according to claim 6, wherein The nonionic surfactant (A) further comprises a nitrogen-containing nonionic surfactant (A2). 9 . The synthetic fiber processing agent according to claim 1 , further comprising an aromatic antioxidant (B).

10. The synthetic fiber processing agent according to claim 1, wherein further containing a smoothing agent (C), The smoothing agent (C) comprises the following ester compound (C1), Ester compound (C1): at least one selected from the group consisting of a complete ester compound (C1-1) of a divalent to 8valent polyol having a chain structure and having 2 to 10 carbon atoms and a monovalent fatty acid having 8 to 24 carbon atoms, and a diester compound (C1-2) of a monovalent alcohol having 8 to 24 carbon atoms and a dibasic acid having 2 to 36 carbon atoms.

11. A synthetic fiber, characterized in that: The synthetic fiber treating agent according to any one of claims 1 to 10 is adhered thereto.

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