JP2020105685A - Treatment agent for synthetic fiber, and synthetic fiber - Google Patents

Abstract

To provide a treatment agent for a synthetic fiber, capable of imparting low frictional property between a fiber and a metal in a spinning step and a weaving step, and imparting high frictional property between fibers after refining process is executed.SOLUTION: A treatment agent for a synthetic fiber contains a smoothing agent component (A), a polyalkylene glycol type nonionic surfactant (B), and a polymer having butadiene and/or isoprene as the essential constituent monomer. In the treatment agent for a synthetic fiber, a weight ratio of the polymer (C) is 1-30 wt.% based on the weight of a nonvolatile component of the treatment agent for a synthetic fiber.SELECTED DRAWING: None

Description

The present invention relates to a synthetic fiber treating agent (hereinafter sometimes abbreviated as a treating agent) and a synthetic fiber.

Various synthetic fiber treating agents are used depending on the purpose in order to smoothly advance the spinning and drawing steps of fibers for industrial materials. In recent years, in order to improve productivity and quality, a treatment agent for synthetic fibers having further excellent friction characteristics has been demanded. In particular, in the yarn making process and the weaving process, in order to smoothly proceed the process, a synthetic fiber treating agent capable of reducing friction with a metal or the like in contact with the fiber is required.
As one of the fibers for industrial materials, which is subjected to spinning using such a treating agent for synthetic fibers, synthetic fibers for airbag (airbag base cloth) and the like can be mentioned.
Generally, an airbag base fabric is obtained by weaving synthetic fiber filaments to which a treating agent for synthetic fibers is applied by a mechanical loom such as a water jet loom and then performing a scouring step. The airbag is rapidly inflated by high-pressure gas supplied from the gas generator after the vehicle collides and expands and deploys in the vehicle to catch the occupant moving in the reaction of the collision and absorb the impact to absorb the occupant. Is to protect. Due to this effect, the air bag is required to be airtight.
After the scouring step, the above-mentioned synthetic fiber treating agent functions as a chemical agent for imparting airtightness to the airbag, and is a technology using an ester compound having an aromatic ring and having a molecular weight of 200 to 2600. It is known (Patent Document 1, etc.).
However, the above-mentioned synthetic fiber treating agent has not been sufficient to improve the airtightness of the airbag base fabric.

Japanese Patent No. 4940382

The object of the present invention is to impart a low friction property between fibers and metals in a yarn making process and a weaving process, and after imparting a refining process, it is possible to impart high friction properties between fibers and a fiber, and to obtain a highly airtight synthetic material. It is an object of the present invention to provide a synthetic fiber treating agent capable of obtaining fibers.

The present inventors have arrived at the present invention as a result of extensive studies to solve the above problems.
That is, the present invention contains a leveling agent component (A), a polyalkylene glycol type nonionic surfactant (B), and a polymer (C) containing butadiene and/or isoprene as an essential constituent monomer. A synthetic fiber treatment agent, wherein the weight ratio of the polymer (C) is 1 to 30% by weight based on the weight of the non-volatile components of the synthetic fiber treatment agent; A synthetic fiber containing a treating agent for fibers, wherein the weight ratio of the non-volatile components in the treating agent for synthetic fiber is 0.1 to 3.0% by weight based on the weight of the synthetic fiber. It is a fiber.

The synthetic fiber treating agent of the present invention can impart low friction characteristics between fibers and metals in the yarn making step and the weaving step, and can impart high friction characteristics between fibers after performing the refining step, and is airtight. The effect that a synthetic fiber with high property can be obtained is exhibited.

The treatment agent for synthetic fibers in the present invention is a smoothing agent component (A), a polyalkylene glycol type nonionic surfactant (B), and a polymer (C containing butadiene and/or isoprene as an essential constituent monomer). ) Is a synthetic fiber treatment agent containing.
The weight ratio of the polymer (C) is 1 to 30% by weight based on the weight of the non-volatile component of the synthetic fiber treating agent.
In addition, in the present invention, the non-volatile component is a residue after 1 g of a sample is heated and dried by a circulating air dryer at 130° C. for 45 minutes without a lid in a glass dish.

The smoothing agent in the present invention is a base that imparts smoothness to the fiber and reduces friction applied to the fiber (fiber-metal) during spinning.
As the smoothing agent component (A) in the present invention, from the viewpoint of improving smoothness, an aliphatic monocarboxylic acid alkyl ester (A1), an aliphatic polycarboxylic acid alkyl ester (A2), and a sulfur atom-containing aliphatic carboxylic acid alkyl ester. At least one kind of smoothing agent component (A) selected from the group consisting of (A3) is included.
As the leveling agent component (A), one type may be used, or two or more types may be used in combination.

Examples of the aliphatic monocarboxylic acid alkyl ester (A1) include esters of the aliphatic monocarboxylic acid (a1) and the alcohol (b).
As the aliphatic monocarboxylic acid (a1), a linear or branched aliphatic saturated monocarboxylic acid (a11) having 4 to 24 carbon atoms [linear aliphatic saturated monocarboxylic acid (for example, caproic acid, caprylic acid, caprin Acid, lauric acid, myristic acid, palmitic acid, stearic acid, etc.), branched aliphatic saturated monocarboxylic acid (eg, isostearic acid, isoarachidic acid, etc.)] and a straight-chain or branched aliphatic non-carboxylic acid having 4 to 24 carbon atoms. Saturated monocarboxylic acid (a12) [for example, oleic acid, linoleic acid, linolenic acid, erucic acid, erucic acid, etc.] and an oxycarboxylic acid in which a hydrogen atom in an alkyl group of these aliphatic monocarboxylic acids is substituted with a hydroxyl group (For example, ricinoleic acid etc.) etc. are mentioned.

Examples of the aliphatic polycarboxylic acid alkyl ester (A2) include esters of the aliphatic polycarboxylic acid (a2) and the alcohol (b).
Examples of the aliphatic polycarboxylic acid (a2) include a linear or branched aliphatic saturated dicarboxylic acid (a21) having 4 to 24 carbon atoms [eg, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid. And sebacic acid, etc.], a linear or branched aliphatic unsaturated dicarboxylic acid having 4 to 24 carbon atoms (a22) [for example, maleic acid, fumaric acid, itaconic acid, mesaconic acid, citraconic acid, etc.], a carboxyl group of 3 Examples thereof include a linear or branched aliphatic polycarboxylic acid (a23) having 4 or more carbon atoms and having 4 or more carbon atoms [eg, 1,2,3-propanetricarboxylic acid].

As the sulfur atom-containing aliphatic carboxylic acid alkyl ester (A3), a sulfur atom-containing aliphatic carboxylic acid (a3) [preferably having 4 to 24 carbon atoms, for example, thiodiacetic acid, thiodipropionic acid, thiodibutyric acid, thiodiene Valeric acid, thiodihexanoic acid and the like] and esters with the alcohol (b) and the like.

Examples of the alcohol (b) include alcohols having 3 to 32 carbon atoms, and 1 to 5 mol of alkylene oxide adducts of these alcohols.

Examples of the alcohol having 3 to 32 carbon atoms include an aliphatic monohydric alcohol having 8 to 32 carbon atoms [aliphatic saturated monohydric alcohol (straight chain aliphatic saturated monohydric alcohol (for example, lauryl alcohol, palmityl alcohol, stearyl alcohol, etc. ), branched aliphatic saturated monohydric alcohol (eg, 2-ethylhexyl alcohol, 2-decyl tetradecanol, isostearyl alcohol, isoeicosyl alcohol, isotetracosyl alcohol, etc.)}, aliphatic unsaturated monohydric alcohol { Linear aliphatic unsaturated monohydric alcohol (eg, oleyl alcohol, elaidyl alcohol, linoleyl alcohol, elide linoleyl alcohol, erucyl alcohol, etc.), branched aliphatic unsaturated monohydric alcohol (eg, phytol, etc.)] An aliphatic polyhydric (2 to 6 valent) alcohol having 3 to 24 carbon atoms [aliphatic saturated dihydric alcohol (for example, 1,6-hexanediol, neopentyl glycol, etc.) and aliphatic saturated 3 to 6 valent alcohol ( For example, glycerin, trimethylolpropane, pentaerythritol, sorbitol and the like)] and the like.

The alkylene oxide added to the alcohol having 5 to 32 carbon atoms is preferably an alkylene oxide having 2 to 4 carbon atoms (hereinafter, may be abbreviated as AO), and specifically, ethylene oxide (hereinafter, abbreviated as EO). Propylene oxide (hereinafter sometimes abbreviated as PO), butylene oxide (hereinafter sometimes abbreviated as BO), and the like. Of these, EO is more preferable from the viewpoint of emulsifying property.
The average number of moles of AO added is preferably 1 to 4 moles from the viewpoint of smoothness.

As the leveling agent component (A), natural fats and oils (esterification product of fatty acid and glycerin) may be used. Examples of natural fats and oils include rapeseed oil (mixture containing erucic acid triglyceride as main component), palm oil (mixture containing oleic acid and palmitic acid glyceride as main component), castor oil (ricinoleic acid glyceride as main component). Mixture), sunflower oil (a mixture containing linoleic acid and oleic acid as a glyceride as a main component), and the like.

From the viewpoint of smoothness, the smoothing agent component (A) is selected from the group consisting of an aliphatic monohydric alcohol having 12 to 24 carbon atoms, an aliphatic trihydric alcohol having 3 to 6 carbon atoms, and an AO adduct thereof. An esterified product of at least one alcohol and at least one carboxylic acid selected from the group consisting of saturated or unsaturated linear aliphatic monocarboxylic acids having 12 to 18 carbon atoms, adipic acid and thiodipropionic acid More preferably, isoeicosyl stearate, an esterified product of an aliphatic monohydric alcohol having 16 to 24 carbon atoms and oleic acid [preferably oleyl oleate, isostearyl oleate, isoeicosyl oleate, isotetracosyl oleate and 2-decyl tetradecyl oleate], an esterified product of an aliphatic trihydric alcohol having 3 to 6 carbon atoms and an aliphatic monocarboxylic acid having 12 to 24 carbon atoms [preferably natural fat and oil and trimethylolpropane trilaurate], carbon An ester of an aliphatic monohydric alcohol having 12 to 18 or its AO adduct with adipic acid [preferably dioleyl adipate, diisostearyl adipate and dilauryl alcohol EO3 mol adipate], having 12 to 24 carbon atoms Esters of thiodipropionic acid with an aliphatic monohydric alcohol or its AO adduct [preferably dioleyl thiodipropionate, diisostearyl thiodipropionate, bis(2-decyltetradecyl)thiodipropionate and Bis(lauryl alcohol EO 3 mol adduct) thiodipropionate].

The leveling agent component (A) is at least one selected from the group consisting of an aliphatic monocarboxylic acid alkyl ester (A1), an aliphatic polycarboxylic acid alkyl ester (A2), and a sulfur atom-containing aliphatic carboxylic acid alkyl ester (A3). When it is a seed, the acid value of the leveling agent component (A) is preferably 0.2 to 10 mgKOH/g, and more preferably 0.2 to 5 mgKOH/g from the viewpoint of oil film strength.
In the present invention, the acid value is a value measured according to JIS K0070.

The chemical formula weight or number average molecular weight (hereinafter sometimes abbreviated as Mn) of the leveling agent component (A) is preferably 400 to 1,100, and more preferably 500 to 800.
When the chemical formula amount or Mn is 400 or more, heat resistance or oil film strength as a smoothing agent component is particularly excellent, and thus sufficient spinnability is easily obtained. On the other hand, when Mn is 1100 or less, fibers and metal are obtained. It is preferable because the dynamic friction coefficient between the two becomes low, and the spinnability is improved.

In the present invention, the number average molecular weight Mn is a value measured by gel permeation chromatography (GPC). An example will be given below as the measurement conditions of GPC.
<GPC measurement conditions>
Model: HLC-8120 [Tosoh Corp.]
Column: TSK gel SuperH4000, TSK gel SuperH3000, TSK gel SuperH2000 [all manufactured by Tosoh Corporation]
Column temperature: 40°C
Detector: RI
Solvent: Tetrahydrofuran Flow rate: 0.6 ml/min Sample concentration: 0.25% by weight
Injection volume: 10 μl
Standard: Polyoxyethylene glycol [manufactured by Tosoh Corporation; TSK STANDARD POLYETHYLENE OXIDE]
Data processing device: SC-8020 [manufactured by Tosoh Corporation]

The above-mentioned smoothing agent component (A) can be obtained by a known method and comprises an acid [aliphatic monocarboxylic acid (a1), aliphatic polycarboxylic acid (a2) and sulfur atom-containing aliphatic carboxylic acid (a3). At least one selected from the group consisting of] and the alcohol (b) are subjected to an esterification reaction and the like. In the above esterification reaction, an ester-forming derivative [acid halide, acid anhydride or lower (for example, C1-4) alcohol ester] thereof may be used instead of the acid.

The polyalkylene glycol type nonionic surfactant (B) in the present invention is a nonionic surfactant having a polyalkylene glycol chain other than the leveling agent component (A), and the polyalkylene glycol chain has 2 to 2 carbon atoms. Obtained by the addition of 4 AO.

Examples of AO include EO, PO and BO.
Among these, from the viewpoint of increasing the frictional tension between fibers after refining, the polyalkylene glycol chain is preferably an EO alone or an adduct of a combination of EO and PO (random addition or block addition).
The weight ratio of EO in the polyalkylene glycol type nonionic surfactant (B) in the present invention is preferably 50% by weight based on the weight of (B).

Specific examples of the polyalkylene glycol type nonionic surfactant (B) include the following (B1) to (B10).
As the polyalkylene glycol type nonionic surfactant (B), one type may be used alone, or two or more types may be used in combination.

(B1) AO Adduct of Higher Alcohol EO or EO/PO2 to 100 mol adduct of a higher alcohol having 8 to 32 carbon atoms (for example, the above aliphatic monohydric alcohol having 8 to 32 carbon atoms) [2-ethylhexyl alcohol EO and PO block adducts, oleyl alcohol EO 5 to 25 mol adducts, stearyl alcohol EO/PO random adducts, etc.] and the like.

(B2) Carboxylic acid ester of monohydric higher alcohol AO 6 mol or more adduct EO or EO/PO6 to 100 of higher alcohol having 8 to 32 carbon atoms (for example, aliphatic monohydric alcohol having 8 to 32 carbon atoms, etc.) It is an aliphatic carboxylic acid ether ester obtained from a molar adduct and an aliphatic monocarboxylic acid (a1), and examples thereof include isostearyl alcohol EO6 to 20 molar adduct orate.

(B3) AO adduct of alkylphenol An EO of 4 to 100 mol of an alkylphenol having an alkyl group having 6 to 24 carbon atoms (for example, octylphenol, nonylphenol, dodecylphenol, etc.) can be mentioned.

(B4) Fatty acid AO adduct EO5 to 100 mol adduct of a fatty acid having 8 to 24 carbon atoms (for example, one having 8 to 24 carbon atoms in the above aliphatic monocarboxylic acid (a1)) and the like can be mentioned.

(B5) AO Addition Product to Partial Ester of Polyhydric Alcohol and Fatty Acid 2- to 8-valent polyhydric alcohol [including those having 3 to 20 carbon atoms, such as trimethylolpropane and sorbitol] and 8 carbon atoms To 24 monocarboxylic acids [of the above (a1), those having 8 to 24 carbon atoms and the like], EO 4 to 100 mol adduct [sorbitan trioleate EO 20 mol adduct] and the like. ..

(B6) EO6 to 50 of an esterification product of an adduct of a polyhydric alcohol with AO of 6 moles or more and a fatty acid, a polyhydric alcohol having 2 to 8 valences [including those having 3 to 20 carbon atoms, such as trimethylolpropane and sorbitol] Esterification product of a molar adduct with a monocarboxylic acid [the above-mentioned aliphatic monocarboxylic acid (a1) and the like] [eg, trimethylolpropane EO15 to 25 mol adduct trioleate, sorbitol EO15 to 40 mol adduct trioleate, penta] Erythritol EO 15-40 mol adduct trioleate, pentaerythritol EO 15-40 mol adduct trioleate, pentaerythritol EO 15-40 mol adduct tristearate, etc.] and the like.

(B7) AO adduct of esterified product of polyhydric alcohol and fatty acid having hydroxyl group: EO5 to 50 mol adduct of castor oil or hydrogenated castor oil and the like can be mentioned.

(B8) Esterification product of (B7) and fatty acid: (B7) and a fatty acid having 8 to 24 carbon atoms (for example, an aliphatic monocarboxylic acid (a1) having 8 to 24 carbon atoms). Esterified products are included, and specific examples thereof include hydrogenated castor oil EO5 to 25 mol adduct trioleate, hydrogenated castor oil EO5 to 25 mol adduct dioleate, and castor oil EO5 to 25 mol adduct distearate.

(B9) Esterification product of (B7), aliphatic dicarboxylic acid and aliphatic monocarboxylic acid (B7) and aliphatic dicarboxylic acid having 4 to 24 carbon atoms (for example, the aliphatic saturated dicarboxylic acid (a21) and An aliphatic unsaturated dicarboxylic acid or the like) and a fatty acid having 8 to 24 carbon atoms [of the above aliphatic monocarboxylic acids (a1) having 8 to 24 carbon atoms, etc.], and specifically, Examples include hardened castor oil EO25 mol adduct, sebacic acid/stearic acid composite polyester, and the like.

(B10) AO adduct of primary or secondary amine having hydrocarbon group EO or EO/PO2 to 100 mol adduct of primary or secondary amine having hydrocarbon group having 8 to 24 carbon atoms Examples include [addition product of beef tallow alkylamine with 5 to 25 mol of EO].

Among these, as the polyalkylene glycol type nonionic surfactant (B), from the viewpoint of increasing the frictional tension between the fibers after refining, (B1), (B5), (B6), (B7), (B8) and (B10) are preferred.
Preferred as (B1) is an EO 5 to 25 mol PO 5 to 25 mol adduct of an aliphatic monohydric alcohol having 8 to 18 carbon atoms [for example, EO 5 to 25 mol PO 5 to 25 mol block adduct of 2-ethylhexyl alcohol]. , EO 5 to 25 mol PO 5 to 25 mol adduct of stearyl alcohol, and the like].
Preferable examples of (B5) include sorbitol trioleate EO5 to 25 mol adduct.
Preferred as (B6) is an esterified product of a trimethylolpropane EO15-30 adduct and an aliphatic monocarboxylic acid having a carbon number of 12-18 [for example, a distearate or triadduct of a trimethylolpropane EO15-30 mol adduct]. And trilaurate of 15 to 30 mol of EO of methylolpropane].
Preferred as (B7) are EO5 to 50 mol adducts of castor oil or hydrogenated castor oil. Among them, castor oil or hydrogenated castor oil EO10 to 45 mol adduct is more preferable.
Preferred as (B8) are esterified products of EO 5 to 25 mol adduct of castor oil or hydrogenated castor oil and an aliphatic monocarboxylic acid having 10 to 18 carbon atoms [for example, hydrogenated castor oil EO 5 to 25 mol adduct. , Hydrogenated castor oil EO 5 to 25 mol adduct sebacate, and hydrogenated castor oil EO 5 to 25 mol adduct stearate, and the like].
Preferable examples of (B10) include EO5 to 25 mol adduct of amine having a hydrocarbon group having 14 to 18 carbon atoms [for example, tallow alkylamine EO5 to 25 mol adduct, etc.].

The Mn of the polyalkylene glycol type nonionic surfactant (B) is preferably in the range of 500 to 10,000, more preferably 600 to 8,000. When the Mn is 500 or more, the fiber bundleability during drawing is good, the phenomenon of separation of single yarns is small, and the drawability tends to be improved. On the other hand, when Mn is 10,000 or less, the appearance of the treatment agent is good and a uniform solution is easily obtained.
In the present invention, Mn of the polyalkylene glycol type nonionic surfactant (B) is a value measured by GPC. The measurement conditions of GPC include those exemplified in the description of (A).

As the polymer (C) containing butadiene and/or isoprene as an essential constituent monomer in the present invention, 1,3-butadiene and/or 2-methyl-1,3-butadiene (isoprene) may be 1,2- Polymer (C1) obtained by addition and/or 1,4-addition and its modified product (C2) [Compound having ethylenically unsaturated group and carbonyl group in polymer (C1) [having 3 to 20 carbon atoms] Compound, specifically, acrylic acid, methacrylic acid, maleic acid, maleic anhydride, etc.]-added compound (a part of the carboxyl group or 1,3-dioxo-2-oxapropylene group in the molecule is a lower alcohol) (Including a compound esterified with 1 to 4 carbon atoms), a compound having a hydroxyl group introduced at the terminal, etc.], and a compound having hydrogen added to the double bond in these compounds.
Among these, from the viewpoint of airtightness (high frictional property between fibers after refining), preferred is a compound (molecule) in which a compound having an ethylenically unsaturated group and a carbonyl group is added to the polymer (C1). Compounds having a carbonyl group in the inside), and more preferred are compounds obtained by adding maleic acid to the polymer (C1), compounds obtained by adding maleic anhydride to the polymer (C1), and these compounds and lower compounds. It is a partial esterification product with alcohol.
As the polymer (C), one type may be used alone, or two or more types may be used in combination.

When the polymer (C) is a compound having a carbonyl group, the number of carbonyl groups per molecule (C) is preferably 6 to 20 from the viewpoint of airtightness.

From the viewpoint of airtightness, the viscosity of the polymer (C) at 38° C. is preferably 3 Pa·s or more, and more preferably 10 to 1000 Pa·s.
The viscosity is a value measured at 38° C. using a Brookfield viscometer in accordance with JIS K7117-1:1999 (corresponding to ISO2555:1990).

From the viewpoint of airtightness, Mn of the polymer (C) is preferably 1,000 to 100,000.
In the present invention, Mn of the polymer (C) is a value measured by GPC. The measurement conditions of GPC include those exemplified in the description of (A).

The polymer (C) is Craprene LIR-410 (compound obtained by adding maleic acid monomethyl ester to polyisoprene, number of carbonyl groups=20, viscosity at 38° C.=430 Pa·s), LIR-403 (polyisoprene). Maleic anhydride adduct of, carbonyl group number=6, viscosity at 38° C.=200 Pa·s), LIR-30 (polyisoprene, viscosity at 38° C.=70 Pa·s), LIR-50 (polyisoprene, 38° C.) Viscosity=500 Pa·s), LIR-700 (polyisoprene), LIR-290 (partially hydrogenated polyisoprene, viscosity at 38° C.=1200 Pa·s), LBR-352 (polybutadiene, viscosity at 38° C.=6 Pa). .S), LBR-361 (polybutadiene, viscosity at 38.degree. C.=5.5 Pa.s), LBR-302 (polybutadiene, viscosity at 38.degree. C.=0.6 Pa.s), LBR-305 (polybutadiene, viscosity at 38.degree. C.) =40 Pa·s) and LBR-307 (polybutadiene, viscosity at 38° C.=1.5 Pa·s) [both manufactured by Kuraray Co., Ltd.] are commercially available.

The treating agent of the present invention may contain an antioxidant (D). The antioxidant is an agent for suppressing the oxidation of the treatment agent and softening the hardness of the heat-deteriorated product of the treatment agent.

Examples of the antioxidant (D) in the present invention include hindered phenolic antioxidants [2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)- 1,3,5-triazine [IRGANOX 565 manufactured by BASF], triethylene glycol-bis-3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionate [IRGANOX 245], pentaerythritol- Tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] [IRGANOX 1010 manufactured by BASF, etc.] is preferable.
Further, a sulfur-based antioxidant (2-mercaptobenzimidazole or the like) and a phosphorus-based antioxidant [poly(dipropylene glycol)phenylphosphite or the like] may be used in combination.

The treating agent of the present invention may be diluted with a volatile component. Examples of the volatile component include water and mineral oil [refined spindle oil, liquid paraffin (normal paraffin, etc.)] and the like.

Other additives (E) may be added to the treatment agent of the present invention within a range that does not impair the performance.
Other additives (E) include silicone oil (which may be modified with an alkyl group and a polyether group, etc.), antistatic agent (alkyl phosphate ester salt, fatty acid soap, etc.), pH adjuster [ Examples thereof include alkalis (sodium hydroxide, potassium hydroxide, alkylamines and alkylene oxide adducts of alkylamines), organic acids (oleic acid, etc.), ultraviolet absorbers, viscosity modifiers and appearance modifiers.

From the viewpoint of smoothness, the weight ratio of the smoothing agent component (A) contained in the synthetic fiber treating agent of the present invention is preferably 30 to 90% by weight based on the weight of the non-volatile component of the synthetic fiber treating agent. And more preferably 35 to 85% by weight, and particularly preferably 40 to 80% by weight.

The weight ratio of the polyalkylene glycol type nonionic surfactant (B) contained in the synthetic fiber treating agent of the present invention is, based on the weight of the non-volatile component of the synthetic fiber treating agent, from the viewpoint of airtightness, The content is preferably 5 to 60% by weight, more preferably 10 to 55% by weight, and particularly preferably 15 to 50% by weight.

As described above, the weight ratio of the polymer (C) containing butadiene and/or isoprene as an essential constituent monomer contained in the synthetic fiber treating agent of the present invention is the same as the weight of the nonvolatile component of the synthetic fiber treating agent. Based on 1 to 30% by weight.
If it is less than 1% by weight, the performance is deteriorated in that the frictional tension between fibers after refining becomes low (airtightness is lowered), and if it exceeds 30% by weight, the frictional tension between fibers and metal is high. However, the performance deteriorates.
From the viewpoint of further lowering the frictional tension between the fibers and the metal and increasing the frictional tension between the fibers after the refining, the weight ratio of the polymer (C) is, as described above, the synthetic fiber treating agent. It is preferably 5 to 20% by weight based on the weight of the non-volatile component.

The weight ratio (A/B) of the smoothing agent component (A) and the polyalkylene glycol-type nonionic surfactant (B) contained in the synthetic fiber treating agent of the present invention is such that the smoothness and the fiber after refining- From the viewpoint of increasing the frictional tension between the fibers, 10/1 to 1/3 is preferable, and 9/1 to 1/2 is more preferable.
The weight ratio (A/C) of the smoothing agent component (A) and the polymer (C) contained in the synthetic fiber treating agent of the present invention is 30/1 to 1/1 from the viewpoint of smoothness and airtightness. Is preferable, and more preferably 15/1 to 3/2.
The weight ratio (B/C) of the polyalkylene glycol type nonionic surfactant (B) and the polymer (C) contained in the treatment agent for synthetic fibers of the present invention is determined by the friction between fibers after refining. From the viewpoint of increasing the tension and airtightness, it is preferably 20/1 to 1/2, more preferably 10/1 to 2/3.

The weight ratio of the antioxidant (D) contained in the treatment agent for synthetic fiber of the present invention is from the viewpoint of suppressing the oxidation of the treatment agent and softening the hardness of the heat-deteriorated product of the treatment agent. It is preferably 0.1 to 5% by weight, more preferably 0.3 to 3.0% by weight, and particularly preferably 0.5 to 2.5% by weight, based on the total weight of the nonvolatile components. Is.
The weight ratio of the additive (E) contained in the synthetic fiber treating agent of the present invention is preferably 10% by weight or less based on the weight of the non-volatile components of the synthetic fiber treating agent.

When the synthetic fiber treatment agent of the present invention is an emulsion containing the above-mentioned water, the weight ratio of the non-volatile components in the synthetic fiber treatment agent is increased from the viewpoint of increasing the stability of the spinning process and preventing the treatment agent from scattering. Is preferably 10 to 30% by weight, and more preferably 15 to 25% by weight, based on the weight of the synthetic fiber treating agent.
Moreover, when the synthetic fiber treating agent of the present invention is a mineral oil solution containing the above-mentioned mineral oil (when it is not an emulsion containing water), the stability of the spinning process is increased and the scattering of the treating agent is prevented. Therefore, the weight ratio of the non-volatile component in the synthetic fiber treating agent is preferably 10 to 90% by weight, and more preferably 15 to 85% by weight, based on the weight of the synthetic fiber treating agent. .. The kinematic viscosity (25° C.) of the mineral oil solution is preferably 1 to 500 mm ² /s, more preferably ² to 300 mm ² /s. In the present invention, the kinematic viscosity (25°C) is a value measured by an Ubbelohde viscometer.

The treating agent for synthetic fibers of the present invention comprises a smoothing agent component (A), a polyalkylene glycol type nonionic surfactant (B), and a polymer (C containing butadiene and/or isoprene as an essential constituent monomer). ), and if necessary, the antioxidant (D), other additives (E) and volatile components, can be obtained by uniformly mixing at room temperature or by heating (for example, 30 to 90°C) as necessary. .. The mixing order and mixing method of each component are not particularly limited.

The synthetic fiber of the present invention can be obtained by treating the untreated synthetic fiber with a synthetic fiber treating agent.
When actually treating with the synthetic fiber treating agent, as the synthetic fiber treating agent of the present invention, those which do not contain the above volatile components (water, mineral oil, etc.) may be used. It is preferably a solution or emulsion containing a sexual component.
When the mineral oil solution containing the above-mentioned mineral oil is used as the synthetic fiber treating agent (when it is not an emulsion containing water), this treatment method is abbreviated as straight lubrication.
Further, when the above-mentioned water-containing emulsion is used as the synthetic fiber treating agent, this treating method is abbreviated as emulsion oiling.

As a method for attaching the synthetic fiber treating agent to the synthetic fiber, a known method or the like can be used, and it can be applied by using a roller, a guide oil supply device or the like before the spinning step, the drawing step or the winding step.
In the synthetic fiber of the present invention, the weight ratio of the non-volatile component in the treatment agent for synthetic fiber is 0.1 to 3.0% by weight based on the weight of the synthetic fiber after the treatment from the viewpoint of spinnability. It is preferable.

The straight lubrication is preferable as a treatment method when spinning nylon fibers from the viewpoint of spinnability. Further, the above-mentioned emulsion lubrication is preferable as a method for treating other fibers from the viewpoint of disaster prevention and cost.

The synthetic fiber treating agent of the present invention can be used for synthetic fibers.
The synthetic fibers are, for example, fibers for industrial materials such as nylon fibers for airbags, nylon fibers for tire cords, polyester fibers for airbags, polyester fibers for tire cords and polyester fibers for seat belts.
The cloth obtained by using the synthetic fiber treated with the synthetic fiber treating agent of the present invention is excellent in airtightness, and is particularly useful as a treating agent used for synthetic fibers for airbag (airbag base fabric).

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

<Production Example 1: Production of (A-1)>
In a 1-liter four-necked flask equipped with a stirrer and a thermocouple, 89 g (0.5 mol) of thiodipropionic acid, 367 g (1.0 mol) of 2-decyl-1-tetradecanol, and an esterification catalyst were used. 0.5 g of a certain para-toluenesulfonic acid and 0.4 g of a 50% by weight aqueous solution of hypophosphorous acid as a coloring inhibitor were charged, and the temperature was gradually raised to 165° C. under a nitrogen atmosphere, and the pressure was reduced to 2.7 kPa for 10 hours. , Esterification reaction was performed. After cooling to 95° C., 1.5 g of aluminum silicate (“Kyoward 700 SL” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain bis(2-decyltetradecyl)thiodipropionate (A-1). The acid value was 1.5 mgKOH/g.

<Production Example 2: Production of (A-2)>
Bis(lauryl alcohol EO3) was prepared in the same manner as in Production Example 1 except that "3 g of lauryl alcohol EO3 mol adduct 318 g (1.0 mol)" was used instead of "367 g (1.0 mol) of 2-decyltetradecanol". Molar adduct) thiodipropionate (A-2) was obtained. The acid value was 1.5 mgKOH/g.

<Production Example 3: Production of (A-3)>
A 1-liter four-necked flask equipped with a stirrer and a thermocouple was charged with 422 g (2.11 mol) of lauric acid, 100 g (0.75 mol) of trimethylolpropane, and paratoluenesulfonic acid as an esterification catalyst. 5 g and 0.4 g of a 50% by weight aqueous solution of hypophosphorous acid as a coloring inhibitor were charged, the temperature was gradually raised to 165° C. in a nitrogen atmosphere, and the esterification reaction was carried out for 10 hours at a reduced pressure of 2.7 kPa. The mixture was cooled to 95° C., 2.0 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain trimethylolpropane trilaurate (A-3). The acid value was 1.5 mKOH/g.

<Production Example 4: Production of (A-4)>
In a 1-liter four-necked flask equipped with a stirrer and a thermocouple, 282 g (1.0 mol) of oleic acid, 367 g (1.0 mol) of 2-decyl-1-tetradecanol, and a para esterification catalyst were used. 0.5 g of toluenesulfonic acid and 0.4 g of 50% by weight aqueous solution of hypophosphorous acid as an anti-coloring agent were charged, the temperature was gradually raised to 165° C. under a nitrogen atmosphere, and the ester was depressurized at 2.7 kPa for 10 hours. The chemical reaction was carried out. After cooling to 95° C., 1.5 g of aluminum silicate (“Kyoward 700 SL” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain 2-decyltetradecyl oleate (A-4). The acid value was 1.5 mKOH/g.

<Production Example 5: Production of (A-5)>
Oleyl oleate (A-5) was obtained in the same manner as in Production Example 4, except that "oleyl alcohol 268 g (1.0 mol)" was used instead of "2-decyl tetradecanol 367 g (1.0 mol)". It was The acid value was 1.5 mKOH/g.

<Production Example 6: Production of (A-6)>
In a 1-liter four-necked flask equipped with a stirrer and a thermocouple, 73 g (0.5 mol) of adipic acid, 268 g (1.0 mol) of oleyl alcohol, and 0.5 g of paratoluenesulfonic acid which is an esterification catalyst. Then, 0.4 g of a 50% by weight aqueous solution of hypophosphorous acid was added as a coloring inhibitor, the temperature was gradually raised to 165° C. under a nitrogen atmosphere, and the esterification reaction was carried out for 10 hours at a reduced pressure of 2.7 kPa. After cooling to 95° C., 1.5 g of aluminum silicate (“Kyoward 700 SL” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm, and filtration was performed to obtain dioleyl diadipate (A-6). The acid value was 1.5 mKOH/g.

<Production Example 7: Production of (B1-1)>
2-Dethylhexyl alcohol (46 g, 0.35 mol) and potassium hydroxide (1.6 g), which are a catalyst, were charged into a dried AOA reaction tank, the pressure was reduced to nitrogen, and then the temperature was raised to 100° C. and the degree of pressure reduction was 2.7 kPa. It was dehydrated for 90 minutes. After dehydration, the temperature was raised to 160° C., 284 g (4.9 mol) of propylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). After aging until pressure equilibrium was reached, 194 g (4.4 mol) of ethylene oxide was gradually charged and the reaction was carried out at a pressure of 0.5 MPa (G). 0.8 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 80° C. for 30 minutes. Then, diatomaceous earth was laid on the filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain 2-ethylhexyl alcohol PO 14 mol EO 12.5 mol block adduct (B1-1).

<Production Example 8: Production of (B1-2)>
2-Dethylhexyl alcohol (46 g, 0.35 mol) and potassium hydroxide (1.6 g), which are a catalyst, were charged into a dried AOA reaction tank, the pressure was reduced to nitrogen, and then the temperature was raised to 100° C. and the degree of pressure reduction was 2.7 kPa. It was dehydrated for 90 minutes. After dehydration, the temperature was raised to 160° C., 139 g (3.2 mol) of ethylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). After aging until pressure equilibrium was reached, 406 g (7.0 mol) of propylene oxide was gradually charged and the reaction was carried out at a pressure of 0.5 MPa (G). 0.8 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 80° C. for 30 minutes. After that, diatomaceous earth was laid on the filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain 2-ethylhexyl alcohol EO 9 mol PO 20 mol adduct (B1-2).

<Production Example 9: Production of (B1-3)>
95 g (0.35 mol) of stearyl alcohol and 1.6 g of potassium hydroxide as a catalyst were charged into a dried AOA reaction tank, and after performing nitrogen substitution under reduced pressure, the temperature was raised to 100° C. and the degree of reduced pressure was 90 at 90 kPa. It was dehydrated for a minute. After dehydration, the temperature was raised to 160° C., 200 g (4.6 mol) of ethylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). After aging until pressure equilibrium was reached, 203 g (3.5 mol) of propylene oxide was gradually charged and the reaction was carried out at a pressure of 0.5 MPa (G). 0.8 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was stirred at 80° C. for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain stearyl alcohol EO13 mol PO10 mol adduct (B1-3).

<Production Example 10: Production of (B6-1)>
In a one-liter four-necked flask equipped with a stirrer and a thermocouple, 183 g (0.64 mol) of stearic acid, 347 g (0.29 mol) of trimethylolpropane EO24 mol adduct, and paratoluene sulfone which is an esterification catalyst. 0.5 g of acid and 0.4 g of 50 wt% hypophosphorous acid aqueous solution as a coloring inhibitor were charged, the temperature was gradually raised to 165° C. under a nitrogen atmosphere, and the esterification reaction was performed for 10 hours at a reduced pressure of 2.7 kPa. I went. After cooling to 95° C., 1.5 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. Thereafter, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm, and filtration was performed to obtain a trimethylolpropane EO24 mol adduct distearate (B6-1).

<Production Example 11: Production of (B6-2)>
In Production Example 10, trimethylolpropane EO24 mol adduct trilaurate (B6-2) was prepared in the same manner except that "oleic acid 246 g (0.87 mol)" was used instead of "stearic acid 183 g (0.64 mol)". Got

<Production Example 12: Production of (B7-1)>
A dried AOA reaction tank was charged with 280 g (0.3 mol) of hardened castor oil and 3.4 g of potassium hydroxide as a catalyst, and nitrogen decompression was carried out. Then, the temperature was raised to 100° C. and the decompression degree was 2.7 kPa. It was dehydrated for a minute. After dehydration, the temperature was raised to 160° C., 132 g (3.0 mol) of ethylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). After aging until pressure equilibrium was reached, 1.6 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred at 80° C. for 30 minutes. After that, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm, and filtration was performed to obtain hydrogenated castor oil EO10 mol adduct (B7-1).

<Production Example 13: Production of (B7-2)>
A hydrogenated castor oil EO25 mol adduct (B7-2) was prepared in the same manner as in Production Example 12 except that "ethylene oxide 335 g (7.6 mol)" was used instead of "ethylene oxide 132 g (3.0 mol)". Obtained.

<Production Example 14: Production of (B7-3)>
In a dry AOA reaction tank, 286 g (0.3 mol) of castor oil and 3.4 g of potassium hydroxide as a catalyst were charged, and after nitrogen substitution under reduced pressure, the temperature was raised to 100° C. and the degree of reduced pressure was 2.7 kPa for 90 minutes. It was dehydrated. After dehydration, the temperature was raised to 160° C., 568 g (12.9 mol) of ethylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). After aging until pressure equilibrium was reached, 1.6 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred at 80° C. for 30 minutes. After that, diatomaceous earth was spread on the filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm and filtered to obtain castor oil EO43 mol adduct (B7-3).

<Production Example 15: Production of (B8-1)>
In a 1-liter four-necked flask equipped with a stirrer and a thermocouple, 254 g (0.9 mol) of oleic acid, 611 g (0.3 mol) of 25 mol adduct of hydrogenated castor oil EO, and para-toluene sulfone as an esterification catalyst. 0.5 g of acid and 0.4 g of 50 wt% hypophosphorous acid aqueous solution as a coloring inhibitor were charged, the temperature was gradually raised to 165° C. under a nitrogen atmosphere, and the esterification reaction was performed for 10 hours at a reduced pressure of 2.7 kPa. I went. After cooling to 95° C., 1.5 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. Thereafter, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm, and filtration was performed to obtain hydrogenated castor oil EO25 mol adduct trioleate (B8-1).

<Production Example 16: Production of (B9-1)>
In a one-liter four-necked flask equipped with a stirrer and a thermocouple, 58 g (0.2 mol) of stearic acid, 32 g (0.16 mol) of sebacic acid, 545 g (0.27 mol of EO25 mol of hydrogenated castor oil EO) were added. ), 1.8 g of concentrated acid as an esterification catalyst and 1.3 g of 50% by weight aqueous solution of hypophosphorous acid as an anti-coloring agent are charged, and the temperature is gradually raised to 140° C. under a nitrogen atmosphere, and esterification is performed for 10 hours. The reaction was carried out. After cooling to 95° C., 1.5 g of magnesium silicate (“Kyoward 600S” manufactured by Kyowa Chemical Industry Co., Ltd.) was added and stirred for 30 minutes. Thereafter, diatomaceous earth was spread on a filter paper (filter paper No. 1, manufactured by Advantech) with a thickness of 5 mm, and filtration was performed to obtain a composite polyester (B9-1) of hardened castor oil EO25 mol adduct/sebacic acid/stearic acid.

<Production Example 17: Production of (B10-1)>
81 g (0.3 mol) of beef tallow alkylamine and 3.4 g of potassium hydroxide as a catalyst were charged into a dried AOA reaction tank, and after performing vacuum nitrogen substitution, the temperature was raised to 100° C. and the vacuum degree was 2.7 kPa. It was dehydrated for 90 minutes. After dehydration, the temperature was raised to 160° C., 198 g (4.5 mol) of ethylene oxide was gradually charged, and the reaction was carried out at a pressure of 0.5 MPa (G). The mixture was aged until pressure equilibrium was obtained to obtain a beef tallow alkylamine EO15 mol adduct (B10-1).

<Example 1>
As the leveling agent component (A), 30.8 parts by weight of bis(2-decyltetradecyl)thiodipropionate (the number of blending parts in the non-volatile component, the parts by weight described below have the same meaning unless otherwise described). 2) and bis(lauryl alcohol EO3 mol adduct) thiodipropionate, and 2-ethylhexyl alcohol as polyalkylene glycol type nonionic surfactants (B-1) to (B-3). EO 12.5 mol PO 14 mol block adduct 10.7 parts by weight, hydrogenated castor oil EO 25 mol adduct 5.4 parts by weight, trimethylolpropane EO 24 mol adduct distearate 8.1 parts by weight, antioxidant (D ), 0.4 part by weight of Irganox 245 was added, and the mixture was stirred and mixed at 70 to 80° C. for 1 hour.
After homogenization, the mixture was cooled to 40° C. or lower, 2.4 parts by weight of 15 mol adduct of beef tallow alkylamine EO as (B-5) and modified silicone as additive (E) [KF manufactured by Shin-Etsu Chemical Co., Ltd.] -4917] by weight and 15.0 parts by weight of polyisoprene having a carbonyl group [LIR-410 manufactured by Kuraray Co., Ltd.] as a polymer (C) to prepare Synthetic Fiber Treatment Agent 1. did.
The synthetic fiber treatment agent 1 was diluted with normal paraffin (“Cactus Normal Paraffin YHNP” manufactured by JX Nikko Nisseki Energy Co., Ltd.) to a nonvolatile content of 15% by weight, and the kinematic viscosity was 6 mm ^2. /S, the kinematic viscosity when diluted to 70% by weight was 160 mm ² /s. The kinematic viscosity as used herein is a value measured by a Ubbelohde viscometer for a diluted solution whose temperature is adjusted to 25°C.

<Examples 2 to 22 and Comparative Examples 1 to 3>
In Example 1, instead of (A), (B) and (C) used, (A), (B) and (C) described in Table 1 were compounded in the compounding parts by weight described in Table 1. Further, except that the blending parts by weight of (D) and (E) were changed to the blending parts by weight shown in Table 1, the procedure was carried out in the same manner as in Example 1, and Examples 2 to 22 and Comparative Example 1 were carried out. ~3 synthetic fiber treating agents were prepared.

In addition, each component in Table 1 is as follows.
(A-1): Bis(2-decyltetradecyl)thiodipropionate (chemical formula amount=850)
(A-2): Bis(lauryl alcohol EO3 mol adduct) thiodipropionate (Mn=778)
(A-3): trimethylolpropane trilaurate (chemical formula amount=680)
(A-4): 2-decyl tetradecyl oleate (chemical formula amount=618)
(A-5): oleyl oleate (chemical formula amount=532)
(A-6): Dioleyl diadipate (chemical formula amount = 646)
(A-7): Rapeseed oil (chemical formula amount = 1058)
(B1-1): 2-ethylhexyl alcohol PO 14 mol EO 12.5 mol block adduct (weight ratio of EO: 37% by weight)
(B1-2): 2-ethylhexyl alcohol EO 9 mol PO 20 mol adduct (weight ratio of EO: 24% by weight)
(B1-3): Stearyl alcohol EO 13 mol PO 10 mol adduct (EO weight ratio: 40% by weight)
(B6-1): trimethylolpropane EO24 mol adduct distearate (weight ratio of EO: 61% by weight)
(B6-2): Trimethylolpropane EO 24 mol adduct trilaurate (weight ratio of EO: 61% by weight)
(B6-3): 20 mol of sorbitan trioleate EO adduct (manufactured by Sanyo Kasei Co., Ltd., "Sandet OS-200A") (weight ratio of EO: 48% by weight)
(B7-1): 10 mol of hydrogenated castor oil EO adduct (weight ratio of EO: 32% by weight)
(B7-2): Hydrogenated castor oil EO25 mol adduct (weight ratio of EO: 54% by weight)
(B7-3): Castor oil EO43 mol adduct (weight ratio of EO: 67% by weight)
(B8-1): hydrogenated castor oil EO25 mol adduct trioleate (weight ratio of EO: 39% by weight)
(B9-1): hydrogenated castor oil EO25 mol adduct/sebacic acid/stearic acid composite polyester (weight ratio of EO: 47% by weight)
(B10-1): 15 mol of tallow alkylamine EO adduct (weight ratio of EO: 72% by weight)
(C1-1): Polyisoprene having a carbonyl group (“LIR-410” manufactured by Kuraray Co., Ltd., viscosity at 38° C.=430 Pa·s, Mn=30,000, number of carbonyl groups=20)
(C1-2): Polyisoprene having a carbonyl group (“LIR-403” manufactured by Kuraray Co., Ltd., viscosity at 38° C.=200 Pa·s, Mn=34,000, number of carbonyl groups=6)
(C2-1): Polyisoprene (“LIR-30” manufactured by Kuraray Co., Ltd., viscosity at 38° C.=70 Pa·s, Mn=28,000)
(C2-2): Polyisoprene (“LIR-50” manufactured by Kuraray Co., Ltd., viscosity at 38° C.=500 Pa·s, Mn=54,000)
(C3-1): Polybutadiene (“LBR-305” manufactured by Kuraray Co., Ltd., viscosity at 38° C.=40 Pa·s, Mn=26,000)
(D-1): Irganox 245 (manufactured by BASF Japan Ltd.)
(E-1): Modified silicone (KF-4917 manufactured by Shin-Etsu Chemical Co., Ltd.)

Using the synthetic fiber treating agents of Examples 1 to 22 and Comparative Examples 1 to 3 shown in Table 1, the fiber-to-fiber frictional tension evaluation and the fiber-to-metal frictional tension evaluation after scouring were performed.

<Evaluation of frictional tension between fibers after scouring>
(1) A synthetic fiber treating agent was attached to deoiled and dried nylon 66 airbag raw yarn (470 dtex/72f) by the following method.
Weigh 1.0% by weight of fiber treatment agent into a beaker and dilute with diethyl ether (so that the weight ratio of non-volatile components becomes 0.5% by weight based on the weight after dilution). Diluted), the fibers were immersed. After the whole amount of the diethyl ether diluted solution was attached to the fiber, it was naturally dried at 20° C. for 4 hours to obtain a yarn treated with a treating agent.
(2) About 5 g of the thread prepared in (1) was wound around a perforated plastic bobbin, immersed in hot water at 45° C., and shaken for 1 minute to wash off the treatment agent attached (the operation corresponding to scouring was performed. ).
(3) After that, the bobbin was taken out and naturally dried at 20° C. for 24 hours to obtain a sample thread.
(4) The prepared sample yarn was scoured at a temperature of 25° C. and a humidity of 40% by using a TORAY type friction tester with an initial load of 500 g, a yarn speed of 0.1 m/min and a twist number of 2.5 times. The subsequent fiber-to-fiber frictional tension (g) was measured.
It is shown that the higher the frictional tension value, the more difficult it is for the airbag base fabric to be misaligned and the airtightness is excellent, and in the case of the treatment agent of the present invention, 400 g or more is preferable, and 430 g or more is more preferable in this evaluation condition. ..
(5) The frictional tension between fibers after scouring was measured by the same method as in (1) to (4) except that 0.5% by weight of the treating agent was weighed in a beaker.
Under this evaluation condition, 430 g or more is preferable, and 450 g or more is more preferable.

<Evaluation of frictional tension between fiber and metal>
(1) A synthetic fiber treating agent was attached to deoiled and dried nylon 66 airbag raw yarn (470 dtex/72f) by the following method.
Weigh 1.0% by weight of fiber treatment agent into a beaker and dilute with diethyl ether (so that the weight ratio of non-volatile components becomes 0.5% by weight based on the weight after dilution). Diluted), the fibers were immersed. After the entire amount of the diluted diethyl ether solution was attached to the fiber, it was naturally dried at 20° C. for 4 hours to obtain a sample thread.
(2) Under the conditions of a temperature of 25° C. and a humidity of 40%, the prepared sample yarn is subjected to an initial load of 1000 g on a friction body (surface satin chrome plating, diameter 5 cm) having a surface temperature of 230° C. using a TORAY type friction tester. The fibers were brought into contact with each other at a yarn speed of 300 m/min and a contact angle of 180°, and the fiber-metal frictional tension (g) was measured.
The lower the value of the frictional tension, the lower the friction on the stretching roller. In the case of the treatment agent of the present invention, the evaluation conditions are preferably 1450 g or less, and more preferably 1420 g or less.
(3) The frictional tension between the fiber and the metal was measured in the same manner as in (1) and (2) except that 0.5% by weight of the treating agent was weighed in the beaker.
Under this evaluation condition, 1480 g or less is preferable, and 1450 g or less is more preferable.

From the results in Table 1, it can be seen that the treatment agents of Examples 1 to 22 have low fiber-metal frictional tension and excellent fiber-metal frictional tension characteristics. Further, it can be seen that the fiber-to-fiber frictional tension after refining is high, and the fiber-to-fiber frictional tension characteristics after refining are excellent. Therefore, it can be seen that it is useful as a treatment agent for synthetic fibers, particularly as a treatment agent used for synthetic fibers (airbag base fabric) for airbags.
On the other hand, the treatment agents of Comparative Examples 1 and 2 which do not contain the polymer (C) or have a weight ratio of the polymer (C) of 0.9% by weight have a low frictional tension between the fiber and the metal, It can be seen that the fiber-to-fiber frictional tension after refining is also low, and airtightness cannot be imparted to the synthetic fiber. Furthermore, the treating agent of Comparative Example 3 in which the content of the polymer (C) is 32% by weight has a high fiber-fiber frictional tension after refining and can impart airtightness to the synthetic fibers, but the fiber-metal. It can be seen that the frictional tension between the two is high, and yarn breakage or the like may occur in the yarn making process and the weaving process.
When the synthetic fiber treatment agents of Examples 1 to 22 are used as straight lubrication treatment agents, for example, normal paraffin or the like causes the nonvolatile component weight ratios to be 15% by weight and 70% by weight. It is possible to use it after diluting it.

The synthetic fiber treating agent of the present invention has low fiber-metal friction, and can smoothly advance the yarn making process and the weaving process. Therefore, the treating agent for synthetic fibers of the present invention can be suitably used as a treating agent for spinning fibers for industrial materials.
Further, since the synthetic fiber treating agent of the present invention has a high fiber-to-fiber frictional tension after the refining step, the cloth obtained through the yarn making step and the weaving step is excellent in airtightness. Therefore, the synthetic fiber treating agent of the present invention is particularly useful as a treating agent used for synthetic fibers (airbag base fabric) for airbags.

Claims (5)

Synthetic fiber treating agent containing a smoothing agent component (A), a polyalkylene glycol type nonionic surfactant (B), and a polymer (C) containing butadiene and/or isoprene as an essential constituent monomer. The treating agent for synthetic fiber, wherein the weight ratio of the polymer (C) is 1 to 30% by weight based on the weight of the non-volatile component of the treating agent for synthetic fiber. The synthetic fiber treating agent according to claim 1, wherein the polymer (C) has a viscosity at 38° C. of 3 Pa·s or more. The synthetic fiber treating agent according to claim 1 or 2, wherein the polymer (C) has a carbonyl group in the molecule. A synthetic fiber treating agent, wherein the synthetic fiber according to any one of claims 1 to 3 is a synthetic fiber for an airbag. It is a synthetic fiber containing the processing agent for synthetic fibers according to any one of claims 1 to 4, A weight ratio of a nonvolatile ingredient in said processing agent for synthetic fibers is based on the weight of said synthetic fiber. And 0.1 to 3.0% by weight of synthetic fibers.