TWI845836B - Treatment agent for synthetic fiber, synthetic fiber and method for treating synthetic fiber - Google Patents

Abstract

The subject of the present invention is to provide a synthetic fiber treatment agent, synthetic fiber and synthetic fiber treatment method. The synthetic fiber treatment agent has good long-term stability. When the synthetic fiber treatment agent is made into an aqueous liquid and attached to the synthetic fiber, it has good permeability to the synthetic fiber and can fully suppress the problems of fuzzing and dyeing spots in the spinning and stretching steps and post-processing steps. As a solution, the present invention provides a treatment agent for synthetic fibers, which contains: a smoothing agent (A) comprising an ester (A1) of aliphatic alcohol and fatty acid, a non-ionic surfactant (B) and an ionic surfactant (C) comprising a metal salt of dialkyl sulfosuccinate (C1), and the sulfate ion detected by ion chromatography is less than 200 ppm.

Description

Treatment agent for synthetic fiber, synthetic fiber and method for treating synthetic fiber

The present invention relates to a treatment agent for synthetic fibers, synthetic fibers, and a method for treating synthetic fibers. Specifically, the invention relates to the following treatment agent for synthetic fibers, synthetic fibers, and a method for treating synthetic fibers. The treatment agent for synthetic fibers has good long-term stability, and improves the permeability of the aqueous liquid of the treatment agent for synthetic fibers to synthetic fibers, which can fully prevent fuzzing in the spinning and stretching step, and improve the dyeability of the resulting yarn.

Previously, as a treatment agent for synthetic fibers used in the spinning process, a lubricant and a functional enhancer were generally used. In order to prevent static electricity from being generated in the spinning process and the post-processing process, antistatic agents were widely used in the treatment agents for synthetic fibers, and a sulfonate salt was proposed as an antistatic agent (for example, Patent Document 1). However, the treatment agents for synthetic fibers containing sulfonates previously had a problem in that the long-term stability of the treatment agents became insufficient due to the sulfate ions contained in the sulfonates. In addition, regarding the above-mentioned synthetic fiber treatment agents, various agents containing functional enhancers have been proposed in order to prevent spinning fuzz or end breakage (for example, Patent Document 2, etc.). However, when these previous synthetic fiber treatment agents are made into aqueous liquids and applied to synthetic fibers, there are problems such as insufficient permeability to synthetic fibers, poor yarn bundling, and fuzz and dyeing spots in the spinning and post-processing steps.

Prior art literature Patent Literature

Patent document 1: Japanese Patent No. 5967852

Patent document 2: Japanese Patent Publication No. 01-298281

The problem to be solved by the present invention is to provide a synthetic fiber treatment agent, synthetic fiber and a synthetic fiber treatment method. The synthetic fiber treatment agent has good long-term stability. When the synthetic fiber treatment agent is made into an aqueous liquid and attached to the synthetic fiber, it has good permeability to the synthetic fiber and can fully suppress the problems of fuzzing and dyeing spots in the spinning and stretching steps and the post-processing steps.

The inventors of the present invention conducted research to solve the above problems and found that the sulfate ion concentration in the synthetic fiber treatment agent containing esters of aliphatic alcohols and fatty acids, non-ionic surfactants and dialkyl sulfosuccinate metal salts is highly correlated with the long-term stability, thereby solving the above problems.

Specifically, the gist of the present invention is as follows.

1. A treatment agent for synthetic fibers, characterized in that it contains: a smoothing agent (A) comprising an ester (A1) of a fatty alcohol and a fatty acid, a non-ionic surfactant (B), and an ionic surfactant (C) comprising a metal salt of a dialkyl sulfosuccinate (C1), and the sulfate ion detected by ion chromatography is less than 200 ppm.

2. The synthetic fiber treating agent as described in 1., wherein the above-mentioned dialkyl sulfosuccinate metal salt (C1) is an alkyl group with 4 to 12 carbon atoms.

3. The synthetic fiber treating agent as described in 2., wherein the above-mentioned dialkyl sulfosuccinate metal salt (C1) is di(2-ethylhexyl) sulfosuccinate metal salt.

4. A synthetic fiber treatment agent as described in any one of 1. to 3., wherein the above-mentioned metal salt of dialkyl sulfosuccinate (C1) is contained in a ratio of more than 1 mass % and less than 15 mass % in the total of the above-mentioned smoothing agent (A), the above-mentioned nonionic surfactant (B) and the above-mentioned ionic surfactant (C).

5. The synthetic fiber treatment agent as described in 4., wherein the above-mentioned metal salt of dialkyl sulfosuccinate (C1) is contained in a ratio of more than 3 mass % and less than 15 mass % in the total of the above-mentioned smoothing agent (A), the above-mentioned non-ionic surfactant (B) and the above-mentioned ionic surfactant (C).

6. A synthetic fiber treatment agent as described in any one of 1. to 5., wherein as the non-ionic surfactant (B), the total of the smoothing agent (A), the non-ionic surfactant (B) and the ionic surfactant (C) contains a compound (B1) having a mass average molecular weight of 2000 or less represented by the following formula (1) at a ratio of 0.1 to 15 mass %.

[Chemistry 1] HO-Xa-Yb-H (1)

(In formula (1),

X: oxyethyl

Y: oxypropyl

The repetition of X and Y can be done by either block or random method; a, b: a is an integer from 0 to 35, b is an integer from 0 to 25, and a+b is an integer greater than 1)

7. A synthetic fiber treatment agent as described in any one of 1. to 6., wherein the sulfate ion detected from the synthetic fiber treatment agent by ion chromatography is less than 100 ppm.

8. A synthetic fiber treatment agent as described in any one of 1. to 7., wherein when the total content of the smoothing agent (A), the nonionic surfactant (B) and the ionic surfactant (C) is 100% by mass, the smoothing agent (A) is contained at a ratio of 20 to 94% by mass, the nonionic surfactant (B) is contained at a ratio of 5 to 60% by mass, and the ionic surfactant (C) is contained at a ratio of 1 to 20% by mass.

9. A synthetic fiber characterized by having attached thereto a synthetic fiber treatment agent as described in any one of 1. to 8.

10. A method for treating synthetic fibers, characterized by: a step of attaching a synthetic fiber treating agent as described in any one of 1. to 8. to the synthetic fibers.

The synthetic fiber treatment agent of the present invention has good long-term stability. When the synthetic fiber treatment agent is made into an aqueous liquid and attached to the synthetic fiber, the permeability to the synthetic fiber is also very excellent. Therefore, it can fully prevent the fuzzing in the spinning and stretching steps and the post-processing steps, and can improve the dyeability of the obtained yarn, so it is very useful.

The present invention relates to a synthetic fiber treatment agent, a synthetic fiber to which the synthetic fiber treatment agent is attached, and a treatment method for attaching the synthetic fiber treatment agent to the synthetic fiber. The synthetic fiber treatment agent is characterized in that it contains: a smoothing agent (A) comprising an ester (A1) of a fatty alcohol and a fatty acid, a non-ionic surfactant (B), and an ionic surfactant (C) comprising a metal salt of a dialkyl sulfosuccinate (C1), and the sulfate ion detected by ion chromatography is less than 200 ppm.

The present invention is described in detail below.

<Smoothing agent (A)>

The synthetic fiber treatment agent of the present invention contains a smoothing agent (A) as an essential component, and the smoothing agent contains an ester (A1) of a fatty alcohol and a fatty acid.

<Ester (A1)>

The ester of aliphatic alcohol and fatty acid (A1) in the present invention is preferably any one or more of an ester compound of aliphatic monoalcohol and aliphatic monocarboxylic acid (a1-1), an ester compound of aliphatic polyalcohol and aliphatic monocarboxylic acid (a1-2), an ester compound of aliphatic monoalcohol and aliphatic polycarboxylic acid (a1-3), and an ester compound of aliphatic alcohol and fatty acid such as natural oils and fats (a1-4).

Among (a1-1) to (a1-4), (a1-1) and (a1-2) are more suitable, and (a1-1) is more suitable.

The ester compound (a1-1) of aliphatic monoalcohol and aliphatic monocarboxylic acid is preferably an ester of aliphatic monoalcohol having 8 to 18 carbon atoms and aliphatic monocarboxylic acid having 8 to 18 carbon atoms, for example, octyl stearate, oleyl laurate, oleyl oleate, isopentadecyl isostearate, octyl palmitate, octyl laurate, decyl caprylate, isotridecyl myristate, lauryl oleate, etc.

The ester compound (a1-2) of aliphatic polyol and aliphatic monocarboxylic acid is preferably an ester of aliphatic polyol having 3 to 8 carbon atoms and aliphatic monocarboxylic acid having 8 to 18 carbon atoms, for example: 1,6-hexanediol dicaprate, trihydroxymethylpropane monooleate dilaurate, trihydroxymethylpropane trilaurate, glycerol trilaurate, etc.

The ester compound (a1-3) of aliphatic monoalcohol and aliphatic polycarboxylic acid is preferably an ester of aliphatic monoalcohol with carbon number 8 to 18 and aliphatic polycarboxylic acid with carbon number 4 to 10, for example: dioctyl adipate, dilauryl adipate, dioleyl azelate, diisocetyl thiodipropionate, etc.

Examples of esters of aliphatic alcohols and fatty acids (a1-4) such as natural oils and fats include coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, fish oil, and butter.

The synthetic fiber treatment agent of the present invention may contain the esters of the fatty alcohol and fatty acid (A1) alone, or may contain a mixture of two or more thereof.

In addition to the above-mentioned esters of aliphatic alcohols and fatty acids (A1), the synthetic fiber treatment agent of the present invention can use a known smoothing agent (a2) used in synthetic fiber treatment agents alone or in combination of two or more. Specifically, examples include: ester compounds of aromatic monoalcohols and aliphatic monocarboxylic acids (a2-1), ester compounds of aromatic polyols and aliphatic monocarboxylic acids (a2-2), ester compounds of aliphatic monoalcohols and aromatic polycarboxylic acids (a2-3), mineral oils (a2-4), etc.

Examples of the ester compound (a2-1) of an aromatic monoalcohol and an aliphatic monocarboxylic acid include benzyl oleate and benzyl laurate.

As the ester compound (a2-2) of an aromatic polyol and an aliphatic monocarboxylic acid, for example, bisphenol A dilaurate can be cited.

Examples of the ester compound (a2-3) of aliphatic monoalcohol and aromatic polycarboxylic acid include: bis(2-ethylhexyl) phthalate, diisostearyl isophthalate, trioctyl trimellitate, etc.

<Non-ionic surfactant (B)>

The synthetic fiber treatment agent of the present invention contains a non-ionic surfactant (B) as an essential component.

As the nonionic surfactant (B), a known nonionic surfactant used in a treatment agent for synthetic fibers can be used, and specifically, the following compounds can be cited.

Examples of the compound (b1) formed by adding an alkylene oxide having 2 to 4 carbon atoms to an organic acid, organic alcohol, organic amine and/or organic amide molecule include polyoxyethylene laurate, polyoxyethylene oleate, polyoxyethylene methyl ether laurate, polyoxyethylene octyl ether palmitate, bispolyoxyethylene lauryl ether adipate, bispolyoxyethylene octyl ether adipate, polyoxyethylene dioleate, polyoxyethylene octyl ether, polyoxypropylene lauryl ether, polyoxybutylene oleyl ether, polyoxyethylene polyoxypropylene nonylphenyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxyethylene polyoxypropylene tetradecanol ether, polyoxyethylene palmitate, polyoxyethylene lauryl amino ether, polyoxyethylene lauryl amide ether, etc.

As polyoxyalkylene polyol fatty acid ester type non-ionic surfactants (b2), for example: polyoxyethylene sorbitan trioleate, polyoxyethylene castor oil ether, polyoxyethylene polyoxypropylene hydrogenated castor oil tricaprylate, polyoxyethylene hydrogenated castor oil ether trilaurate, etc.

Examples of polyol partial ester type non-ionic surfactants (b3) include sorbitan monooleate, glycerol monolaurate, etc.

As alkylamide type non-ionic surfactant (b4), for example, diethanolamine laurylamide, diethanolamine oleylamide, etc. can be cited.

Examples of polyoxyalkylene fatty amide type non-ionic surfactants (b4) include polyoxyethylene diethanolamine oleylamine, etc.

The synthetic fiber treatment agent of the present invention may contain the non-ionic surfactant (B) alone, or may contain a mixture of two or more.

The synthetic fiber treating agent of the present invention preferably contains a compound (B1) having a mass average molecular weight of 2000 or less represented by the following formula (1): [Chemical 2] HO-Xa-Yb-H (1)

(In formula (1),

X: oxyethyl

Y: oxypropyl

The repetition of X and Y can be done by either block or random method; a, b: a is an integer from 0 to 35, b is an integer from 0 to 25, and a+b is an integer greater than 1)

The synthetic fiber treatment agent of the present invention contains a compound (B1) with a mass average molecular weight of 2000 or less represented by the above formula (1). When the synthetic fiber treatment agent is made into an aqueous liquid and attached to the synthetic fiber, the permeability to the synthetic fiber is improved and the contraction is good, so that the excellent effect of reducing the fuzzing in the spinning extension step and the post-processing step can be exerted. In addition, if the mass average molecular weight of the compound (B1) exceeds 2000, the stability of the synthetic fiber treatment agent formulated therewith will deteriorate. Therefore, the mass average molecular weight of the compound (B1) is preferably 1500 or less.

Furthermore, the synthetic fiber treatment agent of the present invention preferably contains a compound (B1) having a mass average molecular weight of 2000 or less represented by the above formula (1) in the total of the smoothing agent (A), the non-ionic surfactant (B) and the ionic surfactant (C) at a ratio of 0.1 to 15 mass %.

<Ionic surfactant (C)>

The synthetic fiber treatment agent of the present invention contains an ionic surfactant (C) including a dialkylsulfosuccinate metal salt (C1) as an essential component. Examples of the alkali metal constituting the alkali metal salt include sodium and potassium.

The dialkyl sulfosuccinate metal salt (C1) is not particularly limited as long as it is a known metal salt used in a treatment agent for synthetic fibers. Specifically, for example, sodium di(2-ethylhexyl)sulfosuccinate, potassium di(2-ethylhexyl)sulfosuccinate, sodium dibutylsulfosuccinate, potassium dibutylsulfosuccinate, potassium dihexylsulfosuccinate, sodium dihexylsulfosuccinate, sodium dilaurylsulfosuccinate, potassium dilaurylsulfosuccinate, sodium ditridecylsulfosuccinate, potassium ditridecylsulfosuccinate, sodium dioleylsulfosuccinate, potassium dioleylsulfosuccinate, and the like. Among them, preferred are sodium di(2-ethylhexyl)sulfosuccinate, potassium di(2-ethylhexyl)sulfosuccinate, sodium dibutylsulfosuccinate, potassium dihexylsulfosuccinate, sodium dihexylsulfosuccinate, sodium dilaurylsulfosuccinate, potassium dilaurylsulfosuccinate, etc., wherein the carbon number of the alkyl group is 4 to 12, and sodium di(2-ethylhexyl)sulfosuccinate and potassium di(2-ethylhexyl)sulfosuccinate are particularly preferred.

The content of the dialkylsulfosuccinate metal salt (C1) contained in the synthetic fiber treatment agent of the present invention is preferably contained in a ratio of more than 1 mass % and less than 15 mass %, and more preferably contained in a ratio of more than 3 mass % and less than 15 mass % in the total amount of the smoothing agent (A), the nonionic surfactant (B) and the ionic surfactant (C).

In addition to the above-mentioned dialkyl sulfosuccinate metal salt (C1), the synthetic fiber treatment agent of the present invention can use a known ionic surfactant (C2) used in synthetic fiber treatment agents alone or in combination of two or more.

Ionic surfactants (C2) that can be used in conjunction with the synthetic fiber treatment agent of the present invention include: organic fatty acid salts (c2-1), organic sulfonates (c2-2), organic phosphates (c2-3), organic sulfates (c2-4), organic quaternary ammonium salts (c2-5), organic amine oxides (c2-6), organic alanine compounds (c2-7), and organic betaine compounds (c2-8). Such ionic surfactants may be contained alone or in combination of two or more.

Furthermore, the above-mentioned organic sulfonate salt (c2-2) means an organic sulfonate salt other than the dialkyl sulfosuccinate metal salt (C1).

Examples of organic fatty acid salts (c2-1) include alkali metal salts of fatty acids with 6 to 22 carbon atoms, amine salts of fatty acids with 6 to 22 carbon atoms, and phosphonium salts of fatty acids with 6 to 22 carbon atoms. Examples of fatty acids with 6 to 22 carbon atoms include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, oleic acid, erucic acid, linoleic acid, and dodecenylsuccinic acid.

Examples of alkali metals constituting alkali metal salts include sodium and potassium.

啉、哌

、該等之衍生物等芳香族胺類或雜環胺類；單乙醇胺、二乙醇胺、三乙醇胺、異丙醇胺、二異丙醇胺、三異 丙醇胺、丁基二乙醇胺、辛基二乙醇胺、月桂基二乙醇胺等烷醇胺類；聚氧乙烯月桂基胺基醚、聚氧乙烯硬脂基胺基醚等聚氧伸烷基烷基胺基醚類；氨等。 Examples of the amine constituting the amine salt include aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, butylamine, dibutylamine, tributylamine, and octylamine; aniline, pyridine,

Phytol, piperidine

, and their derivatives; aromatic amines or heterocyclic amines; monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, butyldiethanolamine, octyldiethanolamine, lauryldiethanolamine and other alkanolamines; polyoxyethylene laurylamino ether, polyoxyethylene stearylamino ether and other polyoxyalkylene alkylamino ethers; ammonia, etc.

Examples of the phosphonium group constituting the phosphonium salt include: phosphonium groups in which the organic groups bonded to the phosphorus atom such as tetramethylphosphonium, tetraethylphosphonium, tetrabutylphosphonium, trimethylethylphosphonium, trimethylpropylphosphonium, trimethyloctylphosphonium, trimethyldodecylphosphonium, trimethyloctadecylphosphonium, etc. are all aliphatic hydrocarbon groups; phosphonium groups in which at least one of the organic groups bonded to the phosphorus atom such as trimethylphenylphosphonium, triethylphenylphosphonium, tributylphenylphosphonium, dimethyldiphenylphosphonium, triphenylethylphosphonium, tetraphenylphosphonium, etc. is an aromatic hydrocarbon group; etc.

Examples of organic sulfonate salts (c2-2) include: organic sulfonate alkali metal salts having 6 to 22 carbon atoms, organic sulfonate amine salts having 6 to 22 carbon atoms, and organic sulfonate phosphonium salts having 6 to 22 carbon atoms.

Examples of organic sulfonic acids with carbon numbers of 6 to 22 constituting organic sulfonate salts include: alkanesulfonic acids such as decylsulfonic acid, dodecanesulfonic acid, isotridodecanesulfonic acid, tetradecanesulfonic acid, hexadecanesulfonic acid, and pentadecanesulfonic acid; alkylarylsulfonic acids such as butylbenzenesulfonic acid, dodecylbenzenesulfonic acid, octadecylbenzenesulfonic acid, and dibutylnaphthalenesulfonic acid; ester sulfonic acids such as dodecylsulfoacetate and nonylphenoxypolyethylene glycolsulfoacetate, etc.

The alkali metal constituting the organic alkali metal sulfonate salt, the amine constituting the organic amine sulfonate salt, and the phosphonium group constituting the organic phosphonium sulfonate salt are the same as those described in the above-mentioned organic fatty acid salt (c2-1).

Examples of the organic phosphate salt (c2-3) include: an organic phosphate alkali metal salt having an alkoxy group with 4 to 22 carbon atoms (c2-3-1), an organic phosphate alkali metal salt having an alkoxy group with 4 to 22 carbon atoms and 1 to 10 oxyalkylene units constituting a (poly)oxyalkylene group (c2-3-2), an organic phosphate amine salt having an alkoxy group with 4 to 22 carbon atoms (c2-3-3), an organic phosphate amine salt having an alkoxy group with 4 to 22 carbon atoms and 1 to 10 oxyalkylene units constituting a (poly)oxyalkylene group (c2-3-4), etc.

Examples of the organic phosphate metal salt (c2-3-1) having an alkoxy group with 4 to 22 carbon atoms include butyl phosphate metal salt, amyl phosphate metal salt, hexyl phosphate metal salt, heptyl phosphate metal salt, octyl phosphate metal salt, isooctyl phosphate metal salt, 2-ethylhexyl phosphate metal salt, Ester base metal salts, decyl phosphate base metal salts, lauryl phosphate base metal salts, tridecyl phosphate base metal salts, myristyl phosphate base metal salts, cetyl phosphate base metal salts, oleyl phosphate base metal salts, stearyl phosphate base metal salts, eicosyl phosphate base metal salts, behenyl phosphate base metal salts, etc.

The organic phosphate alkali metal salt (c2-3-1) includes a single monoester, a single diester, and a mixture of a monoester and a diester. The diester includes a diester having the same alkoxy group (symmetrical diester) and a diester having different alkoxy groups (asymmetrical diester).

The alkali metal constituting the organic phosphate alkali metal salt (c2-3-1) is the same as that described in the above-mentioned organic fatty acid salt (c2-1).

Examples of the (poly)oxyalkylene-containing organic phosphate alkali metal salt (C2-3-2) (wherein the carbon number of the alkoxy group is 4 to 22, and the number of oxyalkylene units constituting the (poly)oxyalkylene group is 1 to 10) include polyoxyalkylene butyl ether phosphate alkali metal salt, polyoxyalkylene pentyl ether phosphate alkali metal salt, polyoxyalkylene hexyl ether phosphate alkali metal salt, polyoxyalkylene heptyl ether phosphate alkali metal salt, polyoxyalkylene octyl ether phosphate alkali metal salt, polyoxyalkylene isooctyl ether phosphate alkali metal salt, polyoxyalkylene Oxyalkyl 2-ethylhexyl ether phosphate alkali metal salt, polyoxyalkyl decyl ether phosphate alkali metal salt, polyoxyalkyl lauryl ether phosphate alkali metal salt, polyoxyalkyl tridecyl ether phosphate alkali metal salt, polyoxyalkyl myristyl ether phosphate alkali metal salt, polyoxyalkyl cetyl wax ether phosphate alkali metal salt, polyoxyalkyl oleyl ether phosphate alkali metal salt, polyoxyalkyl stearyl ether phosphate alkali metal salt, polyoxyalkyl eicosyl ether phosphate alkali metal salt, polyoxyalkyl behenyl ether phosphate alkali metal salt, etc.

Examples of the (poly)oxyalkylene group in the polyoxyalkylene group-containing organic phosphate alkali metal salt (c2-3-2) include: (poly)oxyethylene group, (poly)oxypropylene group, (poly)oxyethyloxypropylene group, etc.

The polyoxyalkylene-containing organic phosphate alkali metal salt (c2-3-2) includes a single monoester, a single diester, and a mixture of a monoester and a diester. The diester includes a diester having the same alkoxy group (symmetrical diester) and a diester having different alkoxy groups (asymmetrical diester).

The alkali metal constituting the polyoxyalkylene-containing organic phosphate alkali metal salt (c2-3-2) is the same as that described in the above-mentioned organic fatty acid salt (c2-1).

The amines used in the organic phosphate amine salts (c2-3-3) in which the carbon number of the alkoxy group is 4 to 22 and the organic phosphate amine salts (c2-3-4) containing (poly)oxyalkylene groups in which the carbon number of the alkoxy group is 4 to 22 and the number of oxyalkylene units constituting the (poly)oxyalkylene groups is 1 to 10 are the same as those described in the above organic fatty acid salts (c2-1). In addition, the structures other than the amines are the same as the structures of the organic phosphate alkali metal salts (c2-3-1) and the organic phosphate alkali metal salts containing (poly)oxyalkylene groups (c2-3-2) except for the metal salts.

In addition to the above-mentioned organic phosphate alkali metal salt (c2-3-1), organic phosphate alkali metal salt containing (poly) oxyalkylene group (c2-3-2), organic phosphate amine salt (c2-3-3), and organic phosphate amine salt containing (poly) oxyalkylene group (c2-3-4), the organic phosphate ester salt (c2-3-3) in the present invention may also contain components such as monooctyl pyrophosphate metal salt, dioctyl pyrophosphate metal salt, pyrophosphate metal salt, tripolyphosphoric acid, etc., but the amount of these components should be as small as possible.

Examples of organic sulfates (c2-4) include: alkyl sulfate metal salts such as sodium decyl sulfate, sodium dodecyl sulfate, lithium tetradecyl sulfate, potassium cetyl sulfate, etc.; alkali metal salts of sulfates of natural fats and oils such as sulfated tallow oil and sulfated castor oil, etc.

Organic quaternary ammonium salts (C2-5) generally refer to compounds composed of quaternary ammonium cations and anions. Examples of quaternary ammonium cations include: quaternary ammonium cations when the organic groups bonded to the nitrogen atom are all alkyl groups with 1 to 25 carbon atoms; quaternary ammonium cations when the organic groups bonded to the nitrogen atom are all alkenyl groups with 2 to 25 carbon atoms; quaternary ammonium cations when the organic groups bonded to the nitrogen atom are all hydroxyalkyl groups with 1 to 6 carbon atoms; quaternary ammonium cations when part of the organic groups bonded to the nitrogen atom is an alkyl group with 1 to 25 carbon atoms and the rest is an alkenyl group with 2 to 25 carbon atoms; A quaternary ammonium cation group when one part of the organic group on the nitrogen atom is an alkyl group with 1 to 25 carbon atoms and the remaining part is a hydroxyalkyl group with 1 to 6 carbon atoms; a quaternary ammonium cation group when one part of the organic group bonded to the nitrogen atom is an alkenyl group with 2 to 25 carbon atoms and the remaining part is a hydroxyalkyl group with 1 to 6 carbon atoms; a quaternary ammonium cation group when one part of the organic group bonded to the nitrogen atom is an alkyl group with 1 to 25 carbon atoms and the other part is an alkenyl group with 2 to 25 carbon atoms and the remaining part is a hydroxyalkyl group with 1 to 6 carbon atoms.

Examples of the quaternary ammonium cation include tetramethylammonium, trimethylethylammonium, tripropylmethylammonium, tributylmethylammonium, tetrabutylammonium, triethylisooctylammonium, trimethyloctylammonium, trimethyllaurylammonium, trimethylstearylammonium, etc., in which the organic groups bonded to the nitrogen atom are all alkyl groups having 1 to 25 carbon atoms; dibutyldiethylammonium, dimethyldioleylammonium, trimethyloleylammonium, triethyleicoseneammonium, etc. When a portion of an organic group such as ammonium bonded to a nitrogen atom is an alkyl group with 1 to 25 carbon atoms and the remainder is an alkenyl group with 2 to 25 carbon atoms, it is a quaternary ammonium cation; when a portion of an organic group such as tributylhydroxyethylammonium, di(hydroxyethyl)dipropylammonium, tri(hydroxyethyl)octylammonium, tri(hydroxypropyl)methylammonium bonded to a nitrogen atom is an alkyl group with 1 to 25 carbon atoms and the remainder is a hydroxyalkyl group with 1 to 6 carbon atoms, it is a quaternary ammonium cation, etc.

Examples of the anionic groups include anionic groups obtained by removing part or all of the hydrogen ions from monobasic to tribasic organic acids such as organic phosphates, organic sulfates, organic sulfonates, and organic carboxylic acids. For example, the anion group obtained by removing part or all of the hydrogen ions from an organic phosphoric acid ester having 1 to 30 carbon atoms, such as methyl phosphate, diethyl phosphate, dioctyl phosphate, methyl ester oleyl phosphate, methyl nonyl phosphate phenoxyethoxyethyl ester; the anion group obtained by removing part or all of the hydrogen ions from an organic sulfate ester having 1 to 30 carbon atoms, such as methyl sulfate, ethyl sulfate, lauryl sulfate, octylphenyloxypolyethoxyethyl sulfate; the anion group obtained by removing part or all of the hydrogen ions from an organic sulfate ester having 1 to 30 carbon atoms, such as butyl sulfonate, lauryl sulfonate, stearyl sulfonate, oleyl sulfonate, p-toluene sulfonate, dodecylphenyl sulfonate, oleylphenyl sulfonate, naphthyl sulfonate, diisopropylnaphthyl sulfonate, etc. Anions obtained by removing some or all hydrogen ions from organic sulfonates with 1 to 30 carbon atoms; anions obtained by removing some or all hydrogen ions from organic carboxylic acids with 1 to 30 carbon atoms, such as acetic acid, caproic acid, lauric acid, 2-ethylhexanoic acid, isostearic acid, oleic acid, erucic acid, malonic acid, adipic acid, sebacic acid, and pentadecenylsuccinic acid, aromatic carboxylic acids with 7 to 30 carbon atoms, such as benzoic acid, phthalic acid, and trimellitic acid, aliphatic hydroxycarboxylic acids with 3 to 30 carbon atoms, such as lactic acid, ricinoleic acid, and 12-hydroxystearic acid, sulfur-containing aliphatic carboxylic acids with 3 to 30 carbon atoms, such as thiodipropionic acid, etc.

Examples of the organic amine oxide (c2-6) include dimethylethylamine oxide, dimethylpropylamine oxide, dimethylhexylamine oxide, dimethyloctylamine oxide, dimethylnonylamine oxide, dimethyllaurylamine oxide, dimethylmyristylamine oxide, dimethylcetylamine oxide, dimethylstearylamine oxide, dimethyleicosylamine oxide, dihexylmethylamine oxide, dioctylmethylamine oxide, dinonylmethylamine oxide, dilaurylmethylamine oxide, dimyristylmethylamine oxide, dicetylmethylamine oxide, distearylmethylamine oxide, dieicosylmethylamine oxide, etc. The aliphatic hydrocarbon group bonded to the nitrogen atom is Organic amine oxides of saturated aliphatic hydrocarbons with 1 to 24 carbon atoms, 2-tetradecenylamine oxide, 2-pentadecenylamine oxide, 2-octadecenylamine oxide, 15-hexadecenylamine oxide, oleylamine oxide, linoleylamine oxide, tung oilyamine oxide, di(2-tetradecenyl)amine oxide, di(2-pentadecenyl) amine oxide, di(2-octadecenyl)amine oxide, di(15-hexadecenyl)amine oxide, dioleylamine, dilinoleylamine oxide, ditung oilyamine oxide, etc., in which at least one of the aliphatic hydrocarbons bonded to the nitrogen atom is an unsaturated aliphatic hydrocarbon with 14 to 24 carbon atoms, etc.

Examples of the organic alanine compound (c2-7) include: N,N-bis(2-carboxyethyl)-octylamine sodium, N,N-bis(2-carboxyethyl)-dodecylamine sodium, N,N-bis(2-carboxyethyl)-tetradecylamine potassium, N,N-bis(2-carboxyethyl)-hexadecylamine sodium, N,N-bis(2-carboxyethyl)-octadecylamine sodium, N-(2-carboxyethyl)-dodecylamine, N-(2-carboxyethyl)-octadecylamine sodium, N-oleyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, etc.

Examples of the organic betaine compound (c2-8) include octyl dimethyl ammonium acetate, decyl dimethyl ammonium acetate, dodecyl dimethyl ammonium acetate, hexadecyl dimethyl ammonium acetate, octadecyl dimethyl ammonium acetate, nonadecyl dimethyl ammonium acetate, octadecenyl dimethyl ammonium acetate, dodecyl aminopropyl dimethyl ammonium acetate, octadecyl aminopropyl dimethyl ammonium acetate, octadecenyl aminopropyl dimethyl ammonium acetate, etc.

<Sulfate ions>

The characteristic of the synthetic fiber treatment agent of the present invention is that the sulfate ion detected by ion chromatography is below 200 ppm.

The organic sulfonate salt (c2-2) that can be contained, represented by the metal dialkyl sulfosuccinate salt (C1) which is an essential component of the synthetic fiber treatment agent of the present invention, usually contains sulfates such as sodium sulfate derived from its raw material.

The content of sulfate in organic sulfonates can be determined based on the amount of sulfate ions detected by ion chromatography.

The concentration of sulfate ions in the synthetic fiber treatment agent of the present invention measured by ion chromatography is less than 200 ppm, preferably less than 100 ppm.

The concentration of sulfate ions can be quantified by measuring the sulfate ions obtained by ion chromatography. Specifically, the concentration of sulfate ions can be determined as follows.

Accurately weigh 0.1g of the sample (as a treatment agent for synthetic fibers) into a stoppered test tube and dissolve it in 10mL of hexane. Next, add 5mL of pure water, stir, and let stand to separate into a water layer and an oil layer. Pass the water layer through an ODS (chemically bond octadecyl to silica gel) pre-treated column for ion chromatography analysis. Perform the detection under the following ion chromatography conditions. Determine the detection amount based on the peak area ratio relative to a standard solution of known concentration and convert it into the concentration of sulfate ions.

<Ion separation conditions>

Apparatus: IC2001 manufactured by Tosoh with suppressor, analytical column: TSKgel SuperIC-AZ manufactured by Tosoh, inner diameter 4.6mm×length 75mm, guard column: TSKgel guardcolumn SuperIC-AZ manufactured by Tosoh, inner diameter 4.0mm×length 10mm, eluent: 4.8mmol Na ₂ CO ₃ , 2.8mmol NaHCO ₃ in 23 volume % methanol aqueous solution, flow rate: 0.6mL/min.

In order to reduce the sulfate ion concentration in the synthetic fiber treatment agent of the present invention to less than 200 ppm, the sulfate contained in the dialkylsulfosuccinate metal salt (C1) and the organic sulfonate (C2-2) used in the treatment agent, and further the sulfate ion concentration, must be managed. The method is not particularly limited, and a known method can be adopted. For example, as a method for removing sulfate ions from a raw material containing an organic sodium sulfonate salt, the following methods can be cited: a method of precipitating and separating sodium sulfate as an inorganic substance by adding a solvent such as methanol or water to the raw material; a method of allowing sulfate ions to be adsorbed on an adsorbent to perform solid-liquid separation; a method of adding a salt that forms a more insoluble sulfate salt to perform ion exchange, perform adsorption, and then perform solid-liquid separation.

<Composition ratio of treatment agent for synthetic fibers>

The synthetic fiber treatment agent of the present invention preferably contains 20-94 mass% of a smoothing agent (A), 5-60 mass% of a non-ionic surfactant (B), and 1-20 mass% of an ionic surfactant (C) (total 100 mass%).

<Synthetic fiber>

The synthetic fiber of the present invention is a synthetic fiber to which the treatment agent for synthetic fibers of the present invention is attached. There is no particular limitation on the synthetic fiber to which the treatment agent for synthetic fibers of the present invention is attached, and examples thereof include: polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate, and polylactic acid; polyamide fibers such as nylon 6 and nylon 66; polyacrylic acid fibers such as polyacrylic acid and modified acrylic acid; polyolefin fibers such as polyethylene and polypropylene; and polyurethane fibers. Among them, when attached to polyester fibers and polyamide fibers, the effect of the present invention is further exerted, so it is preferred.

The synthetic fiber to which the synthetic fiber treatment agent of the present invention is attached can be obtained as a drawn yarn or a semi-drawn yarn. Among them, the synthetic fiber treatment agent of the present invention is suitable for the manufacture of drawn yarn.

There is no particular limitation on the ratio of the synthetic fiber treatment agent (excluding solvent) of the present invention to be attached to the synthetic fiber. It is preferred to attach the synthetic fiber treatment agent of the present invention in a ratio of 0.1 to 3% by mass relative to the synthetic fiber.

<Handling method>

As a step for attaching the treatment agent for synthetic fibers of the present invention to the synthetic fibers, there can be cited a spinning step, a step of performing spinning and stretching simultaneously, etc. Also, as a method for attaching the treatment agent of the present invention to the synthetic fibers, there can be cited a roll oiling method, a guide oiling method using a metering pump, an immersion oiling method, a spray oiling method, etc. Furthermore, as a form for attaching the treatment agent of the present invention to the synthetic fibers, there can be cited a pure substance, an organic solvent solution, an aqueous liquid, etc., preferably an aqueous liquid. When the treatment agent of the present invention is attached in the form of an aqueous liquid, it is also preferred to attach the treatment agent for synthetic fibers of the present invention in a manner such that the concentration of the treatment agent for synthetic fibers is 0.1-3 mass %, preferably 0.3-1.2 mass %, relative to the synthetic fibers.

The water used as the aqueous liquid of the synthetic fiber treatment agent of the present invention may be, for example, tap water, industrial water, ion exchange water, distilled water, etc., among which ion exchange water and distilled water are preferred.

Implementation example

In order to make the structure and effect of the present invention more concrete, the following examples are given to illustrate the present invention, but the present invention is not limited to these examples. Furthermore, in the following examples and comparative examples, parts means parts by mass, and % means mass %.

<Manufacturing of metal dialkyl sulfosuccinate (C1)>

The specific synthesis method of organic sulfonate salts is described using sodium di(2-ethylhexyl)sulfosuccinate (Production Example 1) and sodium dibutylsulfosuccinate (Production Example 2) as examples.

‧Manufacturing Example 1

Mix 74.1 parts of di(2-ethylhexyl) maleate, 8 parts of isopropanol, 18.4 parts of ion exchange water, 21.5 parts of anhydrous sodium bisulfite, and 0.4 parts of a 20% sodium hydroxide aqueous solution, and react at 105°C for 5 hours. Then, cool to 70°C to precipitate sodium sulfate, and separate the precipitated sodium sulfate by filtration to obtain an aqueous solution of the crude refined product C1-2.

0.7 parts of adsorbent (KYOWAAD600S, manufactured by Kyowa Chemical Industry Co., Ltd.) was added to the aqueous solution of the crude refined product C1-2, and stirred at 80°C for 2 hours. Then, 2 parts of barium stearate were added, stirred at 80°C for 1 hour, and then left to stand for 24 hours. The adsorbent and precipitated sulfate were removed by filtering through a filter, and a highly refined product C1-1 aqueous solution (concentration 78%) was obtained.

‧Manufacturing Example 2

In the above-mentioned Production Example 1, 74.1 parts of di(2-ethylhexyl) maleate was replaced with 49.7 parts of dibutyl maleate, 21.5 parts of anhydrous sodium bisulfite was replaced with 25.1 parts of anhydrous potassium bisulfite, and 0.4 parts of 20% sodium hydroxide aqueous solution was replaced with 0.4 parts of 20% potassium hydroxide aqueous solution. The same operation was performed except that the crude refined product C1-4 and the highly refined product C1-3 of dibutyl potassium sulfosuccinate were obtained.

<Preparation of treatment agents for synthetic fibers>

‧Implementation Example 1

70 parts of decyl caprylate (A1-1) as a smoothing agent (A), 1 part of polyoxyethylene (20 mol) polyethylene glycol (B1-1) as a non-ionic surfactant (B), 6 parts of polyoxyethylene (10 mol) hydrogenated castor oil ether trilaurate (B2-1), 4 parts of diethanolamine oleylamide (B2-3), 10 parts of sodium di(2-ethylhexyl) sulfosuccinate (C1-1) as an ionic surfactant (12.8 parts based on the aqueous solution of C1-1), 2 parts of polyoxyethylene (2 mol) octyl ether potassium phosphate (C2-1), and 7 parts of sodium lauryl phosphate (C2-2) were uniformly mixed in the above proportions to prepare the synthetic fiber treatment agent of Example 1.

‧Implementation Examples 2 to 14 and Comparative Examples 1 to 5

The synthetic fiber treatment agents of Examples 2 to 14 and Comparative Examples 1 to 5 were prepared in the same manner as the synthetic fiber treatment agent of Example 1. The compositions of the synthetic fiber treatment agents of Examples 1 to 14 and Comparative Examples 1 to 5 are summarized in the following Table 1.

The symbols in Table 1 represent the following components.

<Smoothing agent: esters of fatty alcohols and fatty acids (A1)>

A1-1: Decyl octanoate

A1-2: Octyl palmitate

A1-3: Lauryl oleate

A1-4: Isotridecyl myristate

A1-5: Trihydroxymethylpropane trilaurate

<Smoothing agents other than (A1)>

a2-4: Mineral oil (30℃, ^47mm2 /s)

<Non-ionic surfactant (B1)>

B1-1: Polyoxyethylene (20 mol) polyethylene glycol

B1-2: Polyoxyethylene (10 mol) polyoxypropylene (10 mol) linear random polyether

B1-3: Polyoxyethylene (15 mol) polyoxypropylene (15 mol) linear random polyether

B1-4: Polyoxyethylene (20 mol) polyoxypropylene (15 mol) linear block polyether

B1-5: Polyoxyethylene (10 mol) polyoxypropylene (40 mol) linear random polyether

<Non-ionic surfactants (B2) other than (B1)>

B2-1: Polyoxyethylene (10 mol) hydrogenated castor oil ether trilaurate

B2-2: Polyoxyethylene (3 mol) octyl palmitate

B2-3: Diethanolamine oleyl amide

B2-4: Sorbitan monooleate

B2-5: The following uniform mixture (total 100%)

‧Polyoxyethylene (3 mol) polyoxypropylene (3 mol) lauryl ether 75%

‧Polyoxyethylene (3 mol) polyoxypropylene (3 mol) tetradecanol ether 25%

B2-6: Polyoxyethylene (5 mol) palmitole ether

B2-7: Polyoxyethylene (3 mol) oleate

B2-8: Bis(ethylene oxide) (3 mol) octyl ether adipate

B2-9: Polyoxyethylene (7 mol) laurate

<Metal dialkyl sulfosuccinate (C1)>

C1-1: Sodium di(2-ethylhexyl)sulfosuccinate (highly refined product)

C1-2: Sodium di(2-ethylhexyl)sulfosuccinate (crude and refined)

C1-3: Potassium dibutyl sulfosuccinate (highly refined product)

C1-4: Potassium dibutyl sulfosuccinate (crude and refined)

<Ionic surfactants other than (C1) (C2)>

C2-1: Polyoxyethylene (2 mol) octyl ether phosphate potassium salt

C2-2: Sodium lauryl phosphate

C2-3: The following uniform mixture (total 100%)

‧Polyoxyethylene (3 mol) decyl ether phosphate-polyoxyethylene (2 mol) lauryl amine 50%

‧Polyoxyethylene (3 mol) decyl ether phosphate-polyoxyethylene (2 mol) tetradecylamine 20%

‧Polyoxyethylene (3 mol) decyl ether phosphate-polyoxyethylene (2 mol) palmityl amine 20%

‧Polyoxyethylene (3 mol) decyl ether phosphate-polyoxyethylene (2 mol) oleylamine 10%

C2-4: Potassium octanoate

<Evaluation of long-term stability of synthetic fiber treatment agents>

Long-term stability evaluation method of treatment agent: The treatment agent for synthetic fiber prepared by the above method was stored in an incubator at 40°C for 1 week, and the changes before and after storage were evaluated visually according to the following criteria. The results are summarized in Table 2.

[Evaluation Criteria]

◎: No change

○: Although some separation was observed, there was no practical problem.

×: Separation occurs and there are practical problems

<Evaluation of the permeability of synthetic fiber treatment agents to synthetic fibers>

1 part of synthetic fiber treatment agent and 99 parts of ion exchange water were uniformly mixed to prepare an aqueous solution of synthetic fiber treatment agent with a concentration of 1%. The time it takes for 0.1 ml of the prepared aqueous solution to penetrate into the washed polyester taffeta was evaluated according to the following criteria.

[Evaluation Criteria]

◎: Within 30 seconds

○: Within 30~60 seconds

×: More than 60 seconds

<Attachment of aqueous liquids used as treatment agents for synthetic fibers and evaluation of fuzzing during the spinning process>

‧Adhesion of aqueous liquids used as treatment agents for synthetic fibers

After drying polyethylene terephthalate with an inherent viscosity of 0.64 and a titanium oxide content of 0.2% according to the conventional method, the yarn was spun at 295°C using an extruder. By using a metering pump to feed oil to the yarn guide, an aqueous liquid of a synthetic fiber treatment agent with a concentration of 10% was attached to the yarn after being ejected from the spinning nozzle and cooled in such a manner that the amount of the synthetic fiber treatment agent attached was 1.0%. After solidification, the traveling yarn is bundled in the yarn guide and stretched by the first yarn guide roll with a surface speed of 1400m/min and a surface temperature of 90°C, and the second yarn guide roll with a surface speed of 4800m/min and a surface temperature of 150°C. It is then wound at a speed of 4800m/min to obtain 83dtex, 36 filament drawn yarn.

‧Evaluation of spinning pilling

When producing 550,000 m of drawn yarn, the number of fuzzes per hour was measured by a fuzz counting device (DT-105 manufactured by Toray Engineering Co., Ltd.) just before winding, and the evaluation was performed based on the following criteria.

[Evaluation Criteria]

◎: The measured number of fuzz is 0

○: The measured number of fuzz is 1~5

×: The measured number of fuzz is more than 6

<Evaluation of dyeability>

The drawn yarns evaluated for fuzzing were used to produce fabrics with a diameter of 70 mm and a length of 1.2 m using a cylindrical weaving machine. The fabrics were dyed using disperse dyes (trade name Kayalon Polyester Blue EBL-E manufactured by Nippon Kayaku Co., Ltd.) using a high-pressure dyeing method. The dyed fabrics were washed, reduced, cleaned, and dried according to the instructions, and then assembled in an iron cylinder with a diameter of 70 mm and a length of 1 m. The densely dyed parts on the surface of the fabric were counted with the naked eye, and the dyeability was evaluated according to the following criteria.

[Evaluation Criteria]

◎: No concentrated part

○: There are 1 to 7 heavily contaminated areas

×: There are more than 8 heavily contaminated areas

The results of the above long-term stability evaluation, permeability evaluation, fuzzing evaluation, and dyeability evaluation are summarized in the following Table 2.

According to the results in Table 2, it can be seen that according to the present invention, the long-term stability and permeability of the treatment agent for synthetic fibers are good, and thus the generation of spinning fuzz and dyeing spots can be fully suppressed.

Claims (9)

A synthetic fiber treatment agent, characterized in that it contains: a smoothing agent (A) comprising an ester (A1) of an aliphatic alcohol and a fatty acid, a nonionic surfactant (B), and an ionic surfactant (C) comprising a dialkyl sulfosuccinate metal salt (C1) and an ionic surfactant (C2) other than (C1), wherein the sulfate ion detected by ion chromatography is 200 ppm or less, and as the nonionic surfactant (B), a compound (B1) having a mass average molecular weight of 2000 or less represented by the following formula (1) is contained in a ratio of 0.1 to 15 mass % in the total of the smoothing agent (A), the nonionic surfactant (B) and the ionic surfactant (C): [Chemical 1] HO-Xa-Yb-H (1) (In formula (1), X: oxyethyl group Y: oxypropyl group. The repetition of X and Y can be carried out by any method of block or random; a, b: a is an integer of 0 to 35, b is an integer of 0 to 25, and a+b is an integer greater than 1). For example, the synthetic fiber treating agent of claim 1, wherein the dialkyl sulfosuccinate metal salt (C1) is an alkyl group having 4 to 12 carbon atoms. The synthetic fiber treating agent of claim 2, wherein the dialkyl sulfosuccinate metal salt (C1) is di(2-ethylhexyl) sulfosuccinate metal salt. A synthetic fiber treatment agent as claimed in any one of claims 1 to 3, wherein the above-mentioned metal salt of dialkyl sulfosuccinate (C1) is contained in a ratio of more than 1 mass % and less than 15 mass % in the total of the above-mentioned smoothing agent (A), the above-mentioned non-ionic surfactant (B) and the above-mentioned ionic surfactant (C). The synthetic fiber treatment agent of claim 4, wherein the above-mentioned metal salt of dialkyl sulfosuccinate (C1) is contained in the total of the above-mentioned smoothing agent (A), the above-mentioned non-ionic surfactant (B) and the above-mentioned ionic surfactant (C) at a ratio of more than 3 mass % and less than 15 mass %. A synthetic fiber treatment agent as claimed in any one of claims 1 to 3, wherein the sulfate ion detected from the synthetic fiber treatment agent by ion chromatography is less than 100 ppm. For a synthetic fiber treatment agent as claimed in any one of claims 1 to 3, when the total content of the smoothing agent (A), the nonionic surfactant (B) and the ionic surfactant (C) is 100% by mass, the smoothing agent (A) is contained at a ratio of 20 to 94% by mass, the nonionic surfactant (B) is contained at a ratio of 5 to 60% by mass, and the ionic surfactant (C) is contained at a ratio of 1 to 20% by mass. A synthetic fiber characterized by having attached thereto a synthetic fiber treatment agent as described in any one of claims 1 to 7. A method for treating synthetic fibers, characterized by: a step of attaching a synthetic fiber treating agent as described in any one of claims 1 to 7 to the synthetic fibers.