Treatment agent for polyester synthetic fiber and composition thereof, first treatment agent and composition thereof, second treatment agent, treatment method for polyester synthetic fiber, and polyester synthetic fiber

Abstract

The subject of the present invention is to improve the stability of the treatment agent for synthetic fibers, and the antistatic property and softness that the treatment agent for synthetic fibers imparts to the fibers. The treatment agent for polyester synthetic fibers of the present invention contains silicone (A), silicone (B), a nonionic surfactant, an anionic component, and optionally contains silicone (C). Silicone (A) is a silanol-modified silicone having a number average molecular weight of 50,000 or more and less than 200,000. Silicone (B) is a silane coupling agent having at least one functional group selected from methoxy, ethoxy, amino, and isocyanate groups in the molecule, and does not contain an epoxy group. Silicone (C) is at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone (excluding those that meet silicone (A)). The content of silicone (C) in the treatment agent for polyester synthetic fibers is less than 10% by mass.

Description

Technical Field

[0001] The present invention relates to a treatment agent for polyester synthetic fibers, a composition containing the treatment agent for polyester synthetic fibers, a first treatment agent for polyester synthetic fibers, a second treatment agent for polyester synthetic fibers, a composition containing the first treatment agent for polyester synthetic fibers, a method for treating polyester synthetic fibers, and polyester synthetic fibers. Background Art

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

[0003] Currently, there are known treatment agents for synthetic fibers disclosed in Patent Documents 1 to 4. Patent Document 1 discloses a silicone emulsion composition containing silicone having a functional group such as an amino group as an essential component, a surfactant having a polyalkylene oxide adduct as an essential component, and water. Patent Document 2 discloses a water repellent composition containing amino-modified silicone, a silicone resin, and an alkyl polysiloxane. Patent Document 3 discloses a silicone oil composition containing a predetermined silicone oil having a siloxane structure and a predetermined polyoxyalkylene alkyl or alkenyl ether. Patent Document 4 discloses a silicone emulsion composition containing dimethyl silicone and / or amino-modified silicone, a predetermined polyoxyalkylene alkyl ether surfactant, and water.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2013-177495

[0007] Patent Document 2: International Publication No. 2019 / 131456

[0008] Patent Document 3: Japanese Patent Application Publication No. 2020-59799

[0009] Patent Document 4: Japanese Patent No. 4749677 Summary of the invention

[0010] Problems to be solved by the invention

[0011] However, conventional synthetic fiber treatment agents still cannot fully improve the stability, antistatic properties, and softness of the fibers.

[0012] Means for solving problems

[0013] The present inventors have conducted studies to solve the above problems and have found that a polyester synthetic fiber treating agent containing a predetermined amount of silicone, a nonionic surfactant, and an anionic component has a particularly good effect.

[0014] In order to solve the above-mentioned problems, one embodiment of the present invention is a processing agent for polyester synthetic fibers, which contains the following silicone (A), the following silicone (B), a nonionic surfactant, an anionic component, and optionally contains the following silicone (C), and the key point is that the content ratio of the above silicone (C) in the above polyester synthetic fiber processing agent is less than 10% by mass.

[0015] Silicone (A): silanol-modified silicone having a number average molecular weight of 50,000 or more and less than 200,000.

[0016] Silicone (B): A silane coupling agent having at least one functional group selected from the group consisting of a methoxy group, an ethoxy group, an amino group, and an isocyanate group in the molecule and not containing an epoxy group.

[0017] Silicone (C): at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone, excluding those meeting the requirements of the above-mentioned silicone (A).

[0018] The polyester synthetic fiber treating agent may be one in which the silicone (B) contains an amino group in its molecule.

[0019] The above-mentioned polyester synthetic fiber processing agent may be a compound in which the above-mentioned nonionic surfactant comprises a compound in which a total of 3 to 50 mol of alkylene oxide having 2 to 3 carbon atoms is added to 1 mol of a monovalent to tetravalent alcohol having 2 to 18 carbon atoms.

[0020] The polyester synthetic fiber treating agent may be such that the anion component includes at least one selected from organic acids, alkyl sulfonic acids, alkyl sulfuric acids, polyoxyalkylene alkyl sulfuric acids, alkyl phosphates, polyoxyalkylene alkyl phosphates, and metal salts thereof.

[0021] The polyester synthetic fiber treatment agent may contain the following components in a proportion: the silicone (A) of 50% by mass or more and 95% by mass or less, the silicone (B) of 1% by mass or more and 25% by mass or less, the silicone (C) of 0% by mass or more and less than 10% by mass, the nonionic surfactant of 1% by mass or more and 20% by mass or less, and the anionic component of 0.1% by mass or more and 20% by mass or less.

[0022] The above-mentioned treatment agent for polyester synthetic fibers may also be a combination comprising a first treatment agent for polyester synthetic fibers and a second treatment agent for polyester synthetic fibers; the above-mentioned first treatment agent for polyester synthetic fibers contains the above-mentioned silicone (A), the above-mentioned nonionic surfactant, the above-mentioned anionic component, and optionally contains the above-mentioned silicone (C); the above-mentioned second treatment agent for polyester synthetic fibers contains the above-mentioned silicone (B).

[0023] In order to solve the above-mentioned problems, another aspect of the present invention provides a composition containing a processing agent for polyester synthetic fibers, which mainly comprises the processing agent for polyester synthetic fibers and a solvent.

[0024] In order to solve the above-mentioned problems, another embodiment of the present invention provides a first treatment agent for polyester synthetic fibers, which contains the following silicone (A), a nonionic surfactant, an anionic component, and optionally contains the following silicone (C), and when used, is used together with a second treatment agent for polyester synthetic fibers containing the following silicone (B). The key point is that the silicone (C) is contained in a mixture of the above-mentioned first treatment agent for polyester synthetic fibers and the above-mentioned second treatment agent for polyester synthetic fibers in a manner such that the content ratio of the silicone (C) is less than 10% by mass.

[0025] Silicone (A): silanol-modified silicone having a number average molecular weight of 50,000 or more and less than 200,000.

[0026] Silicone (B): A silane coupling agent having at least one functional group selected from the group consisting of a methoxy group, an ethoxy group, an amino group, and an isocyanate group in the molecule and not containing an epoxy group.

[0027] Silicone (C): at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone, excluding those meeting the requirements of the above-mentioned silicone (A).

[0028] In order to solve the above-mentioned problems, another aspect of the present invention provides a composition containing a first treatment agent for polyester synthetic fibers, which mainly comprises the above-mentioned first treatment agent for polyester synthetic fibers and a solvent.

[0029] In order to solve the above-mentioned problems, another embodiment of the present invention provides a method for treating polyester synthetic fibers, the focus of which is: giving a diluted solution of a polyester synthetic fiber treatment agent to the polyester synthetic fibers, wherein the diluted solution of the polyester synthetic fiber treatment agent is obtained by adding the above-mentioned composition containing the first polyester synthetic fiber treatment agent and the second polyester synthetic fiber treatment agent containing the following silicone (B) to a solvent.

[0030] Silicone (B): A silane coupling agent having at least one functional group selected from the group consisting of a methoxy group, an ethoxy group, an amino group, and an isocyanate group in the molecule and not containing an epoxy group.

[0031] The method for treating the polyester synthetic fiber may further include subjecting the fiber to which the diluted solution of the polyester synthetic fiber treating agent has been applied to perform a heat treatment at 100° C. to 200° C.

[0032] In order to solve the above-mentioned problems, another aspect of the present invention provides a polyester synthetic fiber, which mainly includes the above-mentioned polyester synthetic fiber treating agent attached thereto.

[0033] The polyester synthetic fibers mentioned above can also be used as filling cotton.

[0034] Effects of the Invention

[0035] According to the present invention, the stability of the synthetic fiber treatment agent can be improved, and the antistatic property and softness imparted by the synthetic fiber treatment agent to the fiber can be improved. DETAILED DESCRIPTION

[0036] <First embodiment>

[0037] Hereinafter, a first embodiment of the polyester synthetic fiber treatment agent (hereinafter referred to as the treatment agent) of the present invention will be described. The treatment agent of this embodiment contains silicone (A), silicone (B), a nonionic surfactant, and an anionic component as shown below. It may also optionally contain silicone (C) as shown below.

[0038] (Silicone (A))

[0039] The silicone (A) used in the treatment agent of this embodiment is a silanol-modified silicone having a number average molecular weight of 50000 or more and less than 200000. The silanol-modified silicone may be a polydimethylsiloxane compound having a hydroxyl group in the form of a silanol group directly bonded to the terminal silicon atom of the main chain.

[0040] The lower limit of the number average molecular weight of silanol-modified silicone is 50,000 or more, preferably 100,000 or more. When the number average molecular weight is 50,000 or more, the stability of the treatment agent during use can be improved, especially the emulsification stability when the treatment agent is in an emulsion state. The upper limit of the number average molecular weight of silanol-modified silicone is less than 200,000, preferably 150,000 or less. When the number average molecular weight is less than 200,000, the softness imparted by the treatment agent to the fiber can be improved. It can also be the range of any combination of the above upper and lower limits. Among them, the number average molecular weight of silanol-modified silicone can be measured using gel permeation chromatography (GPC). These silicones (A) can be used alone or in combination of two or more.

[0041] The lower limit of the content of silicone (A) in the treatment agent is preferably 35% by mass or more, more preferably 50% by mass or more. When the content is 35% by mass or more, the stability of the treatment agent during use, especially the emulsification stability of the treatment agent in an emulsion state, can be improved. The upper limit of the content of silicone (A) in the treatment agent is preferably 97% by mass or less, more preferably 95% by mass or less. When the content is 97% by mass or less, the stability of the treatment agent during use, especially the emulsification stability of the treatment agent in an emulsion state, can be improved. It can also be a range of any combination of the above upper and lower limits.

[0042] (Silicone (B))

[0043] The silicone (B) used in the treatment agent of the present embodiment is a silane coupling agent having at least one functional group selected from methoxy, ethoxy, amino, and isocyanate groups in the molecule, and does not contain an epoxy group. Silicone (B) can particularly improve the softness imparted by the treatment agent to the fiber. Specific examples of silicone (B) include, for example, 3-aminopropyltriethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, 3-isocyanatepropyltriethoxysilane, etc. Among them, silicone (B) is preferably a silane coupling agent containing an amino group in the molecule. Silane coupling agents containing amino groups can improve the softness imparted by the treatment agent to the fiber.

[0044] These silicones (B) may be used alone or in appropriate combination of two or more.

[0045] The lower limit of the content of silicone (B) in the treatment agent is preferably 0.5% by mass or more, more preferably 1% by mass or more. When the content is 0.5% by mass or more, the softness imparted by the treatment agent to the fiber can be improved. The upper limit of the content of silicone (B) in the treatment agent is preferably 30% by mass or less, more preferably 25% by mass or less. When the content is 30% by mass or less, the softness imparted by the treatment agent to the fiber can be improved. It can also be a range of any combination of the above upper and lower limits.

[0046] (Silicone (C))

[0047] The silicone (C) used in the treatment agent of this embodiment is at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone, excluding silicone (A). Silicone (C) may also be arbitrarily and selectively contained in the treatment agent.

[0048] Examples of the silicone resin include MQ silicone resin, MDQ silicone resin, T silicone resin, and MTQ silicone resin.

[0049] Here, M, D, T, and Q described in relation to silicone resins are described. The notation method for silicone resins using M, D, T, and Q is a notation method generally used as a component constituting silicone resins, wherein M is a monofunctional constituent unit R 1 R 2 R 3 SiO 1 / 2 , D is a difunctional constituent unit R 4 R 5 SiO 2 / 2 , T is a trifunctional structural unit R 6 SiO 3 / 2 , Q is a 4-functional structural unit SiO 4 / 2 . R 1 ~R 6 is a hydrocarbon group having 1 to 24 carbon atoms, with -R a NHR b NH2(where R a and R b is a hydrocarbon group having 2 or 3 carbon atoms) or -R c NH2(where R c is a hydrocarbon group having 2 or 3 carbon atoms), etc., an organic amine group, a vinyl group, a carbinol group.

[0050] The dimethyl silicone is not particularly limited, but preferably has a viscosity of 5 mPa·s or more and 5000 mPa·s or less at 25° C. A known dimethyl silicone having a defined viscosity can be appropriately used.

[0051] The alkyl-modified silicones include silicone oils which are linear polymers composed of siloxane bonds and have -C a H 2a+1 The introduced organic radicals.

[0052] The alkyl-modified silicone is not particularly limited, but preferably has a viscosity of 5 mPa·s or more and 5000 mPa·s or less at 25° C. A known alkyl-modified silicone having a defined viscosity can be appropriately used.

[0053] These silicones (C) may be used alone or in appropriate combination of two or more.

[0054] The content of silicone (C) in the treatment agent is less than 10% by mass. When the content of silicone (C) is less than 10% by mass, the stability of the treatment agent during use, in particular, the emulsification stability of the treatment agent when it is in an emulsion state and the antistatic property of the treatment agent on the fiber will not be hindered.

[0055] (Nonionic surfactant)

[0056] The nonionic surfactant used in the treatment agent of the present embodiment can be exemplified by compounds having a (poly)oxyalkylene structure formed by adding alkylene oxide to alcohols or carboxylic acids, compounds having a (poly)oxyalkylene structure formed by adding alkylene oxide to polyols, ether-ester compounds having a (poly)oxyalkylene structure formed by adding alkylene oxide to ester compounds formed by carboxylic acids and polyols, compounds having a (poly)oxyalkylene structure formed by adding alkylene oxide to alkylamines which are amine compounds, partial ester compounds formed by carboxylic acids and polyols having 3 to 6 carbon atoms, and the like.

[0057] Specific examples of alcohols used as raw materials for nonionic surfactants include (1) straight-chain alkanols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacontanol; (2) isopropanol, isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isotridecanol, isotetradecanol, (i) branched alkanols such as isopentadecyl alcohol, isohexadecanol, isoheptadecanol, isooctadecanol, isonadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexacosanol, isohexacosanol, isohexacosanol, isoctacosanol, isonoctacosanol and isotriacontanol; (2) straight-chain alkanols such as tetradecanol, hexadecanol, heptadecanol, octadecanol and nonadecanol; (3) branched alkanols such as isohexadecanol and isohexadecanol; (4) branched alkanols such as isohexadecanol and isooctadecanol; (5) cyclic alkanols such as cyclopentanol and cyclohexanol; (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol and tristyrenated phenol.

[0058] Specific examples of carboxylic acids used as raw materials for nonionic surfactants include (1) straight-chain alkyl carboxylic acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, and docosanoic acid; (2) branched-chain alkyl carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) straight-chain alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, and octadecatrienoic acid; (4) aromatic carboxylic acids such as benzoic acid; and (5) hydroxycarboxylic acids such as ricinoleic acid.

[0059] The alkylene oxide used as the raw material for forming the (poly)oxyalkylene structure in the nonionic surfactant can be exemplified by alkylene oxides having a carbon number of 2 or more and 4 or less. Specific examples of alkylene oxides include, for example, ethylene oxide, propylene oxide, butylene oxide, etc. The number of moles of alkylene oxide addition can be appropriately set, preferably 0.1 mole or more and 60 moles or less, more preferably 3 moles or more and 50 moles or less, and optimally 5 moles or more and 20 moles or less. It can also be a range of any combination of the above upper and lower limits. Among them, the number of moles of alkylene oxide addition represents the number of moles of alkylene oxide relative to 1 mole of alcohols or carboxylic acids in the loading raw material. Alkylene oxides can be used alone or in combination of two or more. When two types of alkylene oxides are used, their addition method can be any one of block addition, random addition, and a combination of block addition and random addition, without special restrictions.

[0060] Specific examples of the polyol used as a raw material for the nonionic surfactant include ethylene glycol, propylene glycol, 1,3-propane diol, 1,2-butane diol, 1,3-butane diol, 1,4-butane diol, 2-methyl-1,2-propane diol, 1,5-pentane diol, 1,6-hexane diol, 2,5-hexane diol, 2-methyl-2,4-pentane diol, 2,3-dimethyl-2,3-butane diol, glycerol, 2-methyl-2-hydroxymethyl-1,3-propane diol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, and the like.

[0061] Specific examples of the alkylamine used as a raw material of the nonionic surfactant include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine, octadecylamine, coconut amine and the like.

[0062] These nonionic surfactants may be used alone or in combination of two or more.

[0063] Among them, preferred are compounds obtained by adding 3 or more but less than 50 moles of alkylene oxide having 2 or more but less than 3 carbon atoms to 1 mole of monovalent or more but less than 4-valent alcohol having 2 or more but less than 18 carbon atoms. Further preferred are compounds obtained by adding 5 or more but less than 20 moles of ethylene oxide and propylene oxide to 1 mole of monovalent or more but less than 4-valent alcohol having 2 or more but less than 18 carbon atoms. These compounds can improve the antistatic property of the treatment agent on the fiber.

[0064] Specific examples of nonionic surfactants include polyoxyethylene (6 mol: represents the number of added moles of alkylene oxide (the same applies hereinafter)) polyoxypropylene (2) lauryl ether, polyoxyethylene (10) C12-13 branched alkyl ether, polyoxyethylene (20) sorbitan monostearate, polyoxyethylene (40) hydrogenated castor oil, and the like.

[0065] The lower limit of the content of the nonionic surfactant in the treatment agent is preferably 0.5% by mass or more, more preferably 1% by mass or more. When the content is 0.5% by mass or more, the stability of the treatment agent during use, especially the emulsification stability of the treatment agent in an emulsion state, can be improved. The upper limit of the content of the nonionic surfactant in the treatment agent is preferably 30% by mass or less, more preferably 20% by mass or less. When the content is 30% by mass or less, the softness of the treatment agent to the fiber can be improved. It can also be a range of any combination of the above upper and lower limits.

[0066] (Anionic component)

[0067] Examples of the anionic component used in the treatment agent of the present embodiment include anionic compounds such as acids and salts thereof. The anionic component can particularly enhance the antistatic property of the treatment agent on the fiber.

[0068] Examples of the acid include inorganic acids, organic acids, fatty acids, alkyl sulfonic acids, alkyl sulfuric acids, polyoxyalkylene alkyl sulfuric acids, alkyl phosphates, polyoxyalkylene alkyl phosphates, fatty acid sulfates, oil and fat sulfates, and salts thereof.

[0069] Specific examples of the inorganic acid or its salt include hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid, carbonic acid, sodium hydrogen sulfate, sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium hydrogen carbonate, and the like.

[0070] Specific examples of the organic acid include citric acid, tartaric acid, lactic acid, malic acid, succinic acid, fumaric acid, maleic acid, gluconic acid, glucuronic acid, and benzoic acid.

[0071] Fatty acid can be appropriately used as known, and can be saturated fatty acid or unsaturated fatty acid. In addition, it can be straight chain or a compound with branched structure. In addition, it can be monobasic fatty acid or polycarboxylic acid (polyprotonic acid).

[0072] Specific examples of saturated fatty acids include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid (caprylic acid), caprylic acid (2-ethylhexanoic acid), caprylic acid (caprylic acid), nonanoic acid, capric acid (caprylic 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), and tetracosanoic acid.

[0073] Specific examples of unsaturated fatty acids include crotonic acid, myristic acid, palmitoleic acid, oleic acid, tallow acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidic acid.

[0074] Specific examples of polycarboxylic acids (polyprotic acids) include, for example, (1) diprotic acids such as succinic acid, fumaric acid, maleic acid, adipic acid, and sebacic acid; (2) triprotic 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.

[0075] Among these fatty acids, fatty acids having 8 to 18 carbon atoms are preferred from the viewpoint of excellent antistatic properties imparted by the treatment agent to the fibers.

[0076] Specific examples of the alkyl sulfonic acid include lauryl sulfonic acid (dodecyl sulfonic acid), myristic acid, cetyl sulfonic acid, oleyl sulfonic acid, stearyl sulfonic acid, tetradecyl sulfonic acid, dodecylbenzene sulfonic acid, and secondary alkyl sulfonic acid (C13-15).

[0077] Specific examples of the alkyl sulfate include lauryl sulfate, oleyl sulfate, and stearyl sulfate.

[0078] Specific examples of the polyoxyalkylene alkyl sulfate include polyoxyethylene lauryl ether sulfate, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, polyoxyethylene lauryl ether sulfate, polyoxyethylene oleyl ether sulfate, and the like.

[0079] Specific examples of the alkyl phosphate include lauryl phosphate, cetyl phosphate, octyl phosphate, oleyl phosphate, and stearyl phosphate.

[0080] Specific examples of the polyoxyalkylene alkyl phosphate include polyoxyethylene lauryl ether phosphate, polyoxyethylene oleyl ether phosphate, polyoxyethylene stearyl ether phosphate, and the like.

[0081] Specific examples of fatty acid sulfates include castor oil fatty acid sulfate, sesame oil fatty acid sulfate, rosin oil fatty acid sulfate, soybean oil fatty acid sulfate, rapeseed oil fatty acid sulfate, palm oil fatty acid sulfate, lard fatty acid sulfate, tallow fatty acid sulfate, and whale oil fatty acid sulfate.

[0082] Specific examples of the sulfate esters of fats and oils include sulfate esters of castor oil, sesame oil, rosin oil, soybean oil, rapeseed oil, palm oil, lard, tallow, and whale oil.

[0083] Examples of salts include ammonium salts, amine salts, and metal salts. Examples of metal salts include alkali metal salts and alkaline earth metal salts. Specific examples of alkali metals constituting alkali metal salts include sodium, potassium, and lithium. Examples of alkaline earth metals constituting alkaline earth metal salts include metals that conform to Group 2 elements, such as calcium, magnesium, beryllium, strontium, and barium.

[0084] The amine constituting the amine salt may be any of a primary amine, a secondary amine, and a tertiary amine. Specific examples of amines constituting amine salts include, for example, (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, NN-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, and dimethyllaurylamine; (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and derivatives thereof; (3) alkanolamines such as monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyldiethanolamine, octyldiethanolamine, and lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; (5) polyoxyalkylene alkylamine ethers such as polyoxyethylene laurylamine ether and polyoxyethylene stearylamine ether; (6) ammonia, etc.

[0085] Among them, for example, metal salts of fatty acids among the anionic components mentioned above constitute anionic surfactants. Therefore, the anionic components can also be applied to anionic surfactants.

[0086] These anion components may be used alone or in combination of two or more.

[0087] Among them, organic acids, alkyl sulfonic acids, alkyl sulfuric acids, polyoxyalkylene alkyl sulfuric acids, alkyl phosphates, polyoxyalkylene alkyl phosphates, and metal salts thereof are preferred. By using such compounds, the antistatic property of the treatment agent on the fiber can be improved. In addition, from the viewpoint of excellent emulsification properties of the treatment agent, alkyl sulfonic acid metal salts and alkyl phosphate metal salts are preferred.

[0088] The lower limit of the content of the anionic component in the treatment agent is preferably 0.05% by mass or more, more preferably 1% by mass or more. When the content is 0.05% by mass or more, the stability of the treatment agent during use, especially the emulsification stability of the treatment agent in an emulsion state, can be improved. The upper limit of the content of the anionic component in the treatment agent is preferably 35% by mass or less, more preferably 20% by mass or less. When the content is 35% by mass or less, the softness imparted by the treatment agent to the fiber can be improved. It can also be the range of any combination of the above upper and lower limits.

[0089] The preferred content ratio of each component in the treatment agent is as follows: silicone (A) 50% to 95% by mass, silicone (B) 1% to 25% by mass, silicone (C) 0% to less than 10% by mass, nonionic surfactant 1% to 20% by mass, and anionic component 0.1% to 20% by mass. The range may be any combination of the above upper and lower limits. By defining within this range, the effect of the present invention can be improved.

[0090] (Save method)

[0091] The treatment agent is composed of a combination of a first treatment agent for polyester synthetic fibers (hereinafter referred to as "the first treatment agent") and a second treatment agent for polyester synthetic fibers (hereinafter referred to as "the second treatment agent"), wherein the first treatment agent contains silicone (A), a nonionic surfactant, an anionic component, and optionally contains silicone (C), and the second treatment agent contains silicone (B). The first treatment agent is contained in a manner such that the content ratio of silicone (C) in the mixture of the first treatment agent and the second treatment agent is less than 10% by mass. The treatment agent is composed of the first treatment agent and the second treatment agent before use, such as during storage or circulation, wherein the second treatment agent is constituted as an independent agent with the first treatment agent. The treatment agent is prepared into a mixture of the first treatment agent and the second treatment agent when it is used.

[0092] (Solvent)

[0093] The treatment agent of the present embodiment may be mixed with a solvent as appropriate to prepare a composition containing the treatment agent for polyester synthetic fibers (hereinafter referred to as "treatment agent-containing composition"), and stored or distributed as the treatment agent-containing composition.

[0094] The solvent is a solvent having a boiling point of 105°C or less at atmospheric pressure. Examples of the solvent include water and organic solvents. Specific examples of the organic solvent include lower alcohols such as ethanol and propanol, or low polar solvents such as hexane. These solvents can be used alone or in combination of two or more. Among them, polar solvents such as water and lower alcohols are preferred from the perspective of excellent dispersibility or solubility of each component, and water is more preferred from the perspective of excellent operability.

[0095] When the total content of the treatment agent and the solvent in the treatment agent-containing composition is 100 parts by mass, the treatment agent is preferably contained in an amount of 10 parts by mass or more and 80 parts by mass or less.

[0096] The effects of the treatment agent according to the first embodiment described above will be described.

[0097] (1-1) The treatment agent of the first embodiment contains a predetermined silicone, a nonionic surfactant, and an anionic component. Therefore, the stability of the treatment agent, especially the emulsification stability when the treatment agent is in an emulsion state, can be improved. In addition, the antistatic property, softness, and bulkiness of the fiber given by the treatment agent can be improved.

[0098] (1-2) The treatment agent of the first embodiment may also be composed of a combination of a first treatment agent and a second treatment agent, wherein the first treatment agent contains silicone (A), a nonionic surfactant, an anionic component, and optionally contains silicone (C), and the second treatment agent contains silicone (B). This configuration can improve the formulation stability, especially the storage stability, of the treatment agent.

[0099] <Second embodiment>

[0100] Next, a second embodiment that embodies the first treatment agent of the present invention will be described. The description will focus on the differences from the first embodiment described above.

[0101] The first treatment agent of this embodiment contains silicone (A), a nonionic surfactant, an anionic component, and optionally contains silicone (C). The first treatment agent is used together with the second treatment agent containing silicone (B) when used. Silicone (A), silicone (B), nonionic surfactant, anionic component, and silicone (C) are the same as the components described in the first embodiment. When used, the first treatment agent is contained in the mixture, and specifically, the first treatment agent is contained in a manner such that the content ratio of silicone (C) in the mixture mixed with the first treatment agent and the second treatment agent is less than 10% by mass.

[0102] (Solvent)

[0103] The first treatment agent of this embodiment may be mixed with a solvent as appropriate to prepare a composition containing the first treatment agent for polyester synthetic fibers (hereinafter referred to as "composition containing the first treatment agent"), and stored or distributed as the composition containing the first treatment agent.

[0104] The solvent may be those exemplified in the first embodiment. When the total content of the first treatment agent and the solvent in the composition containing the first treatment agent is 100 parts by mass, the first treatment agent is preferably contained in an amount of 10 parts by mass or more and 80 parts by mass or less.

[0105] The effect of the first treatment agent of the second embodiment described above will be described. The second embodiment described above has the following effects in addition to the effects of the first embodiment.

[0106] (2-1) The first treatment agent of the second embodiment contains silicone (A), a nonionic surfactant, an anionic component, and optionally contains silicone (C), and is used together with the second treatment agent containing silicone (B). Therefore, the formulation stability of the first treatment agent, especially the storage stability, can be improved. In addition, by adjusting the mixing ratio between the first treatment agent and the second treatment agent, the composition of the obtained treatment agent can be adjusted. In addition, the first treatment agent can be circulated separately from the second treatment agent.

[0107] <Third embodiment>

[0108] Next, a third embodiment that embodies the second treatment agent of the present invention will be described. The description will focus on the differences from the first and second embodiments.

[0109] The second treatment agent of this embodiment contains silicone (B). When used, the second treatment agent is used together with the first treatment agent containing silicone (A), a nonionic surfactant, an anionic component, and optionally containing silicone (C). Silicone (A), silicone (B), nonionic surfactant, anionic component, and silicone (C) are the same as the components described in the first embodiment. When used, the first treatment agent is contained in the mixture, specifically, the first treatment agent is contained in a manner such that the content ratio of silicone (C) in the mixture mixed with the first treatment agent and the second treatment agent is less than 10% by mass.

[0110] The effects of the second treatment agent of the third embodiment described above will be described. The third embodiment has the following effects in addition to the effects of the first and second embodiments.

[0111] (3-1) The second treatment agent of the third embodiment contains silicone (B). In addition, when used, it is used together with the first treatment agent containing silicone (A), a nonionic surfactant, an anionic component, and optionally containing silicone (C). Therefore, the formulation stability of the second treatment agent, especially the storage stability, can be improved. In addition, by adjusting the mixing ratio with the first treatment agent, the composition of the obtained treatment agent can be adjusted. In addition, the second treatment agent can be circulated separately from the first treatment agent.

[0112] <Fourth embodiment>

[0113] Next, a fourth embodiment of the method for treating polyester synthetic fibers (hereinafter referred to as “fiber treating method”) of the present invention will be described.

[0114] The fiber treatment method of the present embodiment is characterized in that: a diluent of a treatment agent is applied to the polyester synthetic fiber, wherein the diluent of the treatment agent comprises a solvent, the first treatment agent of the second embodiment, and the second treatment agent of the third embodiment. The solvent may be exemplified in the first embodiment. From the viewpoint of operability, the diluent preferably has a non-volatile concentration of 0.01% by mass or more and 10% by mass or less. In this specification, the non-volatile component refers to the residue after the object is heat-treated at 105° C. for 2 hours to fully remove the volatile substances, that is, an absolutely dry substance.

[0115] The method for modulating the diluent may include, for example, a method of adding the first treatment agent or a composition containing the first treatment agent, and the second treatment agent to a solvent. The diluent is preferably a composition containing the first treatment agent of the second embodiment, and the second treatment agent of the third embodiment added to a solvent. The mixing ratio of the first treatment agent and the second treatment agent can be arbitrarily changed in the method of using the first treatment agent and the second treatment agent in combination. Therefore, even under conditions where the manufacturing conditions are different, such as different manufacturing equipment or different climates such as temperature and humidity, a treatment agent or diluent that is optimal for imparting fiber properties or fiber manufacturing properties at any time can be easily modulated by slightly adjusting the mixing ratio. The ratio of the content between the first treatment agent and the second treatment agent is preferably: the mass ratio of the non-volatile matter is the first treatment agent / the second treatment agent = 99.5 / 0.5 to 70 / 30. By being limited to this range, operability can be improved.

[0116] In order to emulsify the treatment agent, each treatment agent or the composition may be mixed with a solvent and stirred using a known stirrer such as a homo-mixer, a homogenizer, a colloid mill, a line mixer, or the like.

[0117] The fiber treatment method is a method of applying the diluent obtained in the above-mentioned manner to the fiber in a spinning production step constituted by a spinning or drawing step, a post-production step, or the like.

[0118] The fiber to which the diluent is applied may be a polyester synthetic fiber, and specific examples of the polyester synthetic fiber include polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins.

[0119] The use of the fiber is not particularly limited, and examples thereof include stuffing, short fibers, long fibers, spinning, nonwoven fabrics, and the like. Short fibers generally refer to what is called "staple" and do not include long fibers called "filaments." In addition, the length of the short fibers is not particularly limited as long as it conforms to the definition of short fibers in the technical field, for example, it is 100 mm or less. Among them, the diluent of the present invention is preferably a polyester synthetic fiber suitable for stuffing. By using a polyester synthetic fiber suitable for stuffing, it is possible to impart a texture such as smoothness to stuffing such as dolls, quilts, and clothing.

[0120] There is no particular restriction on the proportion of the diluent attached to the fiber. It is preferred that the diluent be attached to the fiber so that the final solid content is 0.01% by mass or more and 10% by mass or less, and more preferably 0.1% by mass or more and 3% by mass or less. According to this structure, the efficacy of each component can be effectively exerted. In addition, there is no particular restriction on the method of attaching the diluent. According to the type, method, and purpose of the fiber, a known method such as a drum oiling method, a guided oiling method using a metering pump, an immersion oiling method, a spray oiling method, etc. can be adopted. When the immersion oiling method is used, the immersion time is preferably 1 minute or more and 5 minutes or less.

[0121] The fiber to which the diluent has been applied may be dried or heat-treated by a known method. By drying or heating to volatilize the solvent such as water, the fiber to which the components contained in the first treatment agent and the second treatment agent are attached can be obtained.

[0122] Heat treatment is performed to form a silicone coating on the fiber surface. The heat treatment is preferably performed at a temperature of 100°C to 200°C. The heating time is appropriately set depending on the treatment temperature, etc., and is preferably 1 minute to 20 minutes, more preferably 1 minute to 15 minutes. The heat treatment can promote the reaction between silicone (A) and silicone (B), and form a silicone coating composed of a cross-linked polymer compound on the fiber.

[0123] The effects of the fiber processing method according to the fourth embodiment will be described. The fourth embodiment has the following effects in addition to the effects of the first to third embodiments.

[0124] (4-1) The fiber treatment method of the fourth embodiment is a method of applying a diluent to the fiber in a spinning manufacturing step such as a spinning or stretching step, a post-processing step, etc. In particular, the diluent prepared by adding the first treatment agent of the second embodiment or the composition containing the first treatment agent, or the second treatment agent of the third embodiment to a solvent has excellent emulsification stability. Therefore, the effectiveness of each component on filling cotton, short fibers, long fibers, spun yarn, nonwoven fabrics, etc. can be effectively exerted.

[0125] (4-2) The fiber treatment method of the fourth embodiment may also be to heat treat the fiber to which the dilution of the treatment agent has been applied at a temperature of 100°C to 200°C. The heat treatment can promote the reaction between silicone (A) and silicone (B) to form a silicone coating composed of a cross-linked polymer compound on the fiber. In this way, a more durable coating can be formed, thereby improving the softness of the fiber.

[0126] The above-mentioned embodiment can also be modified as follows: The above-mentioned embodiment and the following modified examples can be combined with each other within the scope of no technical contradiction.

[0127] The preparation method of the dilution of the treatment agent of the above embodiment is not particularly limited, and a method other than the preparation method described in the fiber treatment method column of the fourth embodiment may be used. For example, the above silicones, nonionic surfactants, and anionic components may be mixed and then mixed with a solvent.

[0128] To the extent that the effects of the present invention are not impaired, the treatment agents, compositions, or diluents of the above-mentioned embodiments may further contain other components, such as other solvents, stabilizers, antistatic agents, adhesives, antioxidants, ultraviolet absorbers, organic acids, surfactants other than those mentioned above, and other components that are usually used in treatment agents, etc., as other components to maintain the quality of the treatment agents, compositions, or diluents. However, from the viewpoint of effectively exerting the effects of the present invention, the other components that are usually used in treatment agents other than solvents are preferably 10% by mass or less in each treatment agent.

[0129] Example

[0130] In order to more specifically explain the constitution and effects of the present invention, examples are given below, but the present invention is not limited to these examples. In the following examples and comparative examples, unless otherwise specified, part represents part by mass, and % represents mass %.

[0131] Test Category 1 (Preparation of treatment agent)

[0132] (Example 1)

[0133] As shown in Table 1, the treatment agent of Example 1 was prepared, which includes 75 parts (%) of silanol-modified silicone (number average molecular weight: 100,000) (A-1) of silicone (A), 5 parts (%) of 3-aminopropyltriethoxysilane (functional groups: amino, methoxy) (B-1) of silicone (B), 10 parts (%) of polyoxyethylene (6) polyoxypropylene (2) dodecyl ether (D-1) of nonionic surfactant, 9 parts (%) of octyl phosphate potassium salt (E-2) of anionic component and 1 part (%) of oleic acid (E-4).

[0134] (Examples 2 to 35, Comparative Examples 1 to 12)

[0135] The treatment agents of Examples 2 to 35 and Comparative Examples 1 to 12 were prepared in the same manner as the treatment agent of Example 1, and contained silicone (A), silicone (B), silicone (C), a nonionic surfactant, and an anionic component in the proportions shown in Table 1.

[0136] The type and content of silicone (A), the type and content of silicone (B), the type and content of silicone (C), the type and content of nonionic surfactant, and the type and content of anionic component are shown in the "Silicone (A)" column, "Silicone (B)" column, "Silicone (C)" column, "Nonionic surfactant" column, and "Anionic component" column of Table 1, respectively.

[0137] [Table 1]

[0138]

[0139] The details of silicone (A), silicone (B), silicone (C), nonionic surfactant, and anionic component described in Table 1 are as follows.

[0140] (Silicone (A))

[0141] A-1: Silanol-modified silicone (number average molecular weight: 100,000)

[0142] A-2: Silanol modified silicone (number average molecular weight: 120000)

[0143] A-3: Silanol modified silicone (number average molecular weight: 150000)

[0144] A-4: Silanol-modified silicone (number average molecular weight: 60,000)

[0145] A-5: Silanol modified silicone (number average molecular weight: 180000)

[0146] a-1: Silanol-modified silicone (number average molecular weight: 250,000)

[0147] a-2: Silanol-modified silicone (number average molecular weight: 20,000)

[0148] (Silicone (B))

[0149] B-1: 3-aminopropyltriethoxysilane (functional groups: amino, methoxy)

[0150] B-2: N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane (functional groups: amino, methoxy)

[0151] B-3: N-2-(aminoethyl)-3-aminopropyltrimethoxysilane (functional groups: amino, methoxy)

[0152] B-4: Methyltrimethoxysilane (functional group: methoxy)

[0153] B-5: Methyltriethoxysilane (functional group: ethoxy)

[0154] B-6: 3-isocyanatepropyltriethoxysilane (functional groups: isocyanate, ethoxy)

[0155] b-1: 3-glycidyloxypropylmethyldimethoxysilane (functional groups: epoxy, methoxy)

[0156] (Silicone (C))

[0157] C-1: Polydimethylsiloxane (viscosity: 1000 mPa·s)

[0158] C-2: Alkyl modified silicone (viscosity: 500 mPa·s)

[0159] C-3: Silicone resin (MQ type) (solid at room temperature)

[0160] (Nonionic surfactant)

[0161] D-1: Polyoxyethylene (6) polyoxypropylene (2) lauryl ether

[0162] D-2: Polyoxyethylene (10) C12-13 branched alkyl ether

[0163] D-3: Polyoxyethylene (20) sorbitan monostearate

[0164] D-4: Polyoxyethylene (40) hardened castor oil

[0165] (Anionic component)

[0166] E-1: Sodium dodecyl sulfonate

[0167] E-2: Potassium octyl phosphate

[0168] E-3: Polyoxyethylene (3) dodecyl sulfate sodium salt

[0169] E-4: Oleic acid

[0170] E-5: Acetic acid

[0171] Test Category 2 (emulsification)

[0172] Each treatment agent prepared in Test Type 1 was diluted with ion-exchanged water to prepare a dilution liquid (emulsion) having a nonvolatile content concentration of 1.0%. The emulsification property, which is stability, was evaluated using this dilution liquid.

[0173] The dilution of each treatment agent was measured for light transmittance (%) at a wavelength of 750 nm under the conditions of 20°C and 60% RH. The measuring device was a spectrophotometer UV-1800 SPECTROPHOTOMETER manufactured by Shimadzu Corporation. The emulsification of the dilution was evaluated using the following criteria. The results are shown in the "Emulsification" column of Table 1.

[0174] ·Evaluation criteria for emulsification

[0175] ◎(Good): No separation, light transmittance above 50%

[0176] ○ (acceptable): no separation, light transmittance 30% or more and less than 50%

[0177] × (bad): Separation test category 3 (flexibility)

[0178] The evaluation was performed using 7 denier polyester synthetic fiber cotton with a cut length of 32 mm, which is used for filling cotton of general cushions and quilts. In order to avoid the influence of lubricants used in the manufacture of polyester synthetic fibers, the cotton was first washed with warm water at 40°C and then dried at 80°C for 2 hours before evaluation.

[0179] The treatment agent of each example prepared in test category 1 was diluted to prepare an emulsion-type dilution with an active ingredient concentration of 12.5%. 2.4 g of the emulsion was evenly sprayed on 100 g of polyester synthetic fiber cotton. Then, a heat treatment (drying treatment) was performed at 150°C for 10 minutes to prepare the sample cotton for evaluation. That is, 0.3 g of the treatment agent was attached to 100 g of cotton.

[0180] Evaluation of softness

[0181] Five panelists familiar with fiber texture evaluation scored the softness of the dried sample cotton using the following criteria, and then rounded the average score of the five panelists to 2 significant figures. The softness was evaluated based on the calculated average score using the following criteria. The results are shown in the "Softness" column of Table 1.

[0182] 1 point: The softness is about the same as that of polyester synthetic fiber without treatment agent.

[0183] 2 points: The perceived softness is greater than that of polyester synthetic fibers without treatment agents.

[0184] 3 points: The softness felt is much greater than that of polyester synthetic fibers without treatment agents.

[0185] ◎(Good): The average score of 5 people is 2.5 points or above

[0186] 0 (acceptable): The average score of 5 people is 2.0 or more and less than 2.5

[0187] ×(poor): The average score of 5 people is less than 2.0 points

[0188] Test Category 4 (Antistatic Properties)

[0189] 5 g of the sample cotton to which each treatment agent prepared in test category 3 was attached was placed in a constant temperature room at 20°C and 45% relative humidity for 24 hours. The resistance of the polyester synthetic fiber was then measured using a known resistance measuring device and evaluated using the following evaluation criteria. The results are shown in the "Antistatic Properties" column of Table 1.

[0190] ·Evaluation criteria for antistatic properties

[0191] ◎(Good): Surface resistance less than 1.0×10 11 Ω

[0192] ○(acceptable): surface resistance 1.0×10 11 Ω or more and less than 1.0×10 12 Ω

[0193] ×(bad): surface resistance 1.0×10 12 Ω or more and

[0194] Test Category 5 (Bulky)

[0195] The bulkiness was evaluated by measuring the compression elastic recovery rate. The compression elastic recovery rate was measured by a test method similar to JIS L 2001.

[0196] 40 g of the sample cotton attached with each treatment agent prepared in test type 3 was passed through a roller carding machine to prepare a carded web with a size of 30 cm × 100 cm attached with the treatment agent. The carded web was cut into 15 cm × 15 cm cloths, and four pieces were prepared. The four pieces of cloth were overlapped to form a rectangular cube, wherein the fiber directions were perpendicular to each other.

[0197] After standing for 30 minutes at 20°C and 40% RH, a 15 cm x 15 cm metal plate (135 g) was placed on the rectangular block, and the height of the rectangular block after 1 minute was recorded in units of 0.1 cm (h1). A 1125 g weight was then placed on the metal plate, and the height after standing for 24 hours (h2) was recorded, and then the weight was removed. The height of the rectangular block after 1 minute from the removal of the weight was recorded (h3).

[0198] The recovery rate is calculated by the following formula.

[0199] Recovery rate (%) = 100 × (h3-h2) / (h1-h2)

[0200] The higher the recovery rate, the better the fluffiness of the sample cotton.

[0201] ◎(Good): Recovery rate (%): 80% or more

[0202] ○ (acceptable): Recovery rate (%) 50% or more and less than 80%

[0203] × (bad): recovery rate (%) less than 50%

[0204] Test Category 6 (Preparation of the first treatment agent)

[0205] (First treatment agent (P-1))

[0206] A first treatment agent (P-1) was prepared, which contained 80 parts (%) of silanol-modified silicone (number average molecular weight: 100,000) (A-1) of silicone (A), 5 parts (%) of polydimethylsiloxane (viscosity: 1000 mPa·s) of silicone (C), 10 parts (%) of polyoxyethylene (6) polyoxypropylene (2) dodecyl ether (D-1) of nonionic surfactant, and 5 parts (%) of sodium dodecyl sulfonate (E-1) of anionic component.

[0207] (First treatment agent P-2 to P-14)

[0208] The first treatment agents P-2 to P-14 were prepared in the same manner as the first treatment agent (P-1), and each of them contained silicone (A), silicone (C), a nonionic surfactant, and an anionic component in the ratios shown in Table 2.

[0209] The type and content of silicone (A), the type and content of silicone (C), the type and content of nonionic surfactant, and the type and content of anionic component are shown in the "Silicone (A)" column, "Silicone (C)" column, "Nonionic surfactant" column, and "Anionic component" column of Table 2, respectively.

[0210] [Table 2]

[0211]

[0212] Test Category 7 (Preparation of the Second Treatment Agent)

[0213] (Second treatment agent (S-1))

[0214] The second treatment agent (S-1) contains 100 parts (%) of 3-aminopropyltriethoxysilane (functional groups: amino group, methoxy group) (B-1) of silicone (B).

[0215] (Second treatment agent S-2 to S-6)

[0216] Second treatment agents S-2 to S-6 were prepared containing silicone (B) in the ratios shown in Table 3. The type and content of silicone (B) are shown in the "Silicone (B)" column of Table 3.

[0217] [Table 3]

[0218]

[0219] Test Category 8 (Evaluation of Stability of Preparations)

[0220] · Evaluation of the formulation stability of the first treatment agent

[0221] Ion exchange water was added to each first treatment agent to adjust the concentration to 40%, and emulsified by a homogenizer to prepare an emulsion (composition containing the first treatment agent). The obtained emulsion was temperature-controlled in a constant temperature room at 20°C and 60%RH for 24 hours. The appearance was visually judged and evaluated using the following criteria. The results are shown in the "Preparation Stability" column of Table 2.

[0222] · Evaluation of formulation stability of the second treatment agent

[0223] Each second treatment agent was placed in a thermostatic chamber at 20°C and 60% RH for 24 hours. The appearance was visually judged and evaluated according to the following criteria. The results are shown in the "Preparation Stability" column of Table 3.

[0224] · Evaluation criteria for formulation stability (first treatment agent and second treatment agent)

[0225] ◎(Good): No separation

[0226] ×(Not available): Separation is possible

[0227] Test category 9 (Preparation of a treatment agent consisting of a first treatment agent and a second treatment agent)

[0228] (Example 36)

[0229] The treatment agent of Example 36 was prepared by mixing 95% (parts) of the first treatment agent (P-1) and 5% (parts) of the second treatment agent (S-1) shown in Table 4.

[0230] (Examples 37 to 54)

[0231] The first treatment agent and the second treatment agent shown in Table 4 were mixed to prepare the treatment agents of each example in the same manner as in Example 36. The type and mass ratio of the first treatment agent and the type and mass ratio of the second treatment agent are shown in the "First Treatment Agent" column and the "Second Treatment Agent" column of Table 4, respectively.

[0232] Using the treatment agents obtained in each example, emulsification, antistatic properties, softness, and bulkiness were evaluated in the same manner as in Example 1. The results are shown in the "emulsification", "antistatic", "softness", and "bulky" columns of Table 4, respectively.

[0233] [Table 4]

[0234]

[0235] As is clear from the evaluation results of each example with respect to the comparative example in Table 1, the treatment agent of the present invention can improve emulsification. In addition, the antistatic property, softness, and bulkiness imparted by the treatment agent to the fiber can be improved. In addition, the first treatment agent and the second treatment agent of the present invention can improve the formulation stability.

Claims

1. A polyester synthetic fiber treatment agent comprising the following first silicone, the following silane coupling agent, a nonionic surfactant, an anionic component, and optionally containing the following second silicone, characterized in that: The content of the second silicone in the polyester synthetic fiber treatment agent is less than 10% by mass. First silicone: silanol-modified silicone having a number average molecular weight of 50,000 or more and less than 200,000, Silane coupling agent: a silane coupling agent having at least one functional group selected from methoxy, ethoxy, amino, and isocyanate groups in the molecule and not containing epoxy groups, The second silicone is at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone, but excluding silicones that conform to the first silicone.

2. The polyester synthetic fiber treating agent according to claim 1, wherein The silane coupling agent mentioned above contains an amino group in its molecule.

3. The polyester synthetic fiber treating agent according to claim 1 or 2, wherein The nonionic surfactant includes a compound obtained by adding 3 to 50 mol of an alkylene oxide having 2 to 3 carbon atoms to 1 mol of a monovalent to tetravalent alcohol having 2 to 18 carbon atoms.

4. The polyester synthetic fiber treating agent according to claim 1 or 2, wherein The anion component includes at least one of an organic acid and a metal salt thereof.

5. The polyester synthetic fiber treating agent according to claim 1 or 2, wherein The anion component includes at least one of alkylsulfonic acid, alkylsulfuric acid, polyoxyalkylene alkylsulfuric acid, alkylphosphate, polyoxyalkylene alkylphosphate, and metal salts thereof.

6. The polyester synthetic fiber treating agent according to claim 1 or 2, wherein The content ratio of each component in the above-mentioned polyester synthetic fiber processing agent is as follows: the above-mentioned first silicone is 50 mass% or more and 95 mass% or less, the above-mentioned silane coupling agent is 1 mass% or more and 25 mass% or less, the above-mentioned second silicone is 0 mass% or more and less than 10 mass%, the above-mentioned nonionic surfactant is 1 mass% or more and 20 mass% or less, and the above-mentioned anionic component is 0.1 mass% or more and 20 mass% or less.

7. The polyester synthetic fiber treating agent according to claim 1 or 2, which is a combination of a first treating agent for polyester synthetic fibers and a second treating agent for polyester synthetic fibers. The first treatment agent for polyester synthetic fibers contains the first silicone, the nonionic surfactant, the anionic component, and optionally contains the second silicone, and the second treatment agent for polyester synthetic fibers contains the silane coupling agent.

8. A composition containing a polyester synthetic fiber treatment agent, characterized in that: The method comprises the polyester synthetic fiber treating agent according to any one of claims 1 to 7 and a solvent.

9. A first treatment agent for polyester synthetic fibers, comprising the following first silicone, a nonionic surfactant, an anionic component, and optionally comprising the following second silicone, and used together with the following second treatment agent for polyester synthetic fibers containing the following silane coupling agent, characterized in that: The second silicone is contained in a mixture of the first treatment agent for polyester synthetic fibers and the second treatment agent for polyester synthetic fibers so that the content ratio of the second silicone is less than 10% by mass, First silicone: silanol-modified silicone having a number average molecular weight of 50,000 or more and less than 200,000, Silane coupling agent: a silane coupling agent having at least one functional group selected from methoxy, ethoxy, amino, and isocyanate groups in the molecule and not containing epoxy groups, The second silicone is at least one selected from silicone resin, dimethyl silicone, and alkyl-modified silicone, but excluding silicones that conform to the first silicone.

10. A composition containing a first treating agent for polyester synthetic fibers, characterized in that: Contains the first treating agent for polyester synthetic fibers according to claim 9 and a solvent.

11. A method for treating polyester synthetic fibers, characterized in that: A diluent for applying a polyester synthetic fiber treatment agent to polyester synthetic fibers, The diluted solution of the polyester synthetic fiber treatment agent is obtained by adding the composition containing the first polyester synthetic fiber treatment agent according to claim 10 and the second polyester synthetic fiber treatment agent containing the following silane coupling agent to a solvent. Silane coupling agent: a silane coupling agent having at least one functional group selected from the group consisting of a methoxy group, an ethoxy group, an amino group, and an isocyanate group in the molecule and not containing an epoxy group.

12. The method for treating polyester synthetic fibers according to claim 11, wherein: Furthermore, the fiber to which the diluted solution of the polyester synthetic fiber treating agent is applied is subjected to a heat treatment at 100° C. or higher and 200° C. or lower.

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

14. The polyester synthetic fiber according to claim 13, which is suitable for filling cotton.

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