TW201823299A - Processing agent for fibers - Google Patents

Abstract

The purpose of the present invention is to provide a processing agent for fibers, which is capable of achieving a good balance between durability in terms of washing and dispersibility in water. In order to achieve the above-mentioned purpose, a processing agent for fibers according to the present invention is characterized by containing the components (A)-(C) described below, and is also characterized in that the component (A) is a copolymer which is obtained by polymerizing at least the monomers (i)-(iii) described below. (A) a branched polyester resin (B) water (C) a nonionic surfactant having an aromatic ring (i) a divalent aromatic carboxylic acid and/or a derivative thereof (ii) a diol (iii) a polyol having 3 or more hydroxyl groups.

Description

Fiber processing chemicals

The present invention relates to a processing agent for fibers.

Fiber processing chemicals are used for the purpose of imparting various functions to fibers, for example.

Examples of processing agents for fibers include durable antistatic agents using polyester resins (Patent Document 1). In addition, there are processing agents for fibers containing, for example, a linear polyester resin, a solvent, and a nonionic active agent (Patent Document 2). [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 38-11298 [Patent Document 2] Japanese Patent Publication No. 44-3967

[Problems to be Solved by the Invention] Among processing agents for fibers, washing durability is important, and the function imparted to the fibers can be maintained even after washing.

However, if the washing durability of a processing agent for fibers is to be improved, the dispersibility in water is decreased, and it is difficult to obtain a liquid that can process fibers. On the other hand, if the dispersibility of the fiber processing agent in water is to be improved, the washing durability is reduced. As described above, it is difficult to coexist the washing durability of the fiber processing agent with the dispersibility in water.

Therefore, an object of the present invention is to provide a processing agent for fibers which can coexist washing durability and dispersibility in water. [Means for solving problems]

In order to achieve the above-mentioned object, the fiber processing agent of the present invention is characterized by including the following components (A) to (C), and the following component (A) is a unit that combines at least the following (i) to (iii) A copolymer obtained by mass polymerization. (A) branched polyester resin (B) water (C) nonionic surfactant having an aromatic ring (i) at least one of a divalent aromatic carboxylic acid and a derivative thereof (ii) a diol (iii) Polyol having three or more hydroxyl groups [Effect of the invention]

According to the processing agent for fibers of the present invention, it is possible to coexist washing durability and dispersibility in water.

Hereinafter, the present invention will be described more specifically with examples. However, the present invention is not limited to the following description.

In the unitary body (i) of the processing agent for fibers of the present invention, the divalent aromatic carboxylic acid may be at least one of terephthalic acid and isophthalic acid, for example.

In the unitary body (ii) of the processing agent for fibers of the present invention, the diol may be at least one of ethylene glycol and polyethylene glycol, for example.

The processing agent for fibers of this invention may contain an aromatic sulfonate, for example.

The processing agent for fibers of this invention can be a durable antistatic agent for fibers, for example.

[1. Processing agent for fiber] The processing agent for fiber of the present invention includes the following component (A) to component (C) as described above, and the following component (A) is at least the following (i) to (Iii) A copolymer obtained by polymerizing a single body. (A) branched polyester resin (B) water (C) nonionic surfactant having an aromatic ring (i) at least one of a divalent aromatic carboxylic acid and a derivative thereof (ii) a diol (iii) Polyols with more than three hydroxyl groups

The inventors have found that a branched polyester resin can be obtained by copolymerizing (co-condensation) a polyol having three or more hydroxyl groups with at least one of a divalent aromatic carboxylic acid and a derivative thereof and a diol, thereby obtaining a branched polyester resin. High washing durability. Furthermore, it was found that if the branched polyester resin uses a nonionic surfactant having an aromatic ring as a dispersant, the dispersibility in water is good. In this way, the present inventors have realized the fiber processing agent of the present invention which can coexist washing durability and dispersibility in water.

(1) Component (A): a branched polyester resin In the fiber processing agent of the present invention, the branched polyester resin (component (A)) is, as described above, at least the following (i) to (iii) A copolymer obtained by polymerizing singular body.

The monovalent body (i) is not particularly limited as the divalent aromatic carboxylic acid (aromatic dicarboxylic acid), and examples thereof include aromatic dicarboxylic acids having 8 to 20 carbon atoms. Specific examples of the divalent aromatic carboxylic acid include phthalic acid, isophthalic acid, terephthalic acid, and 2,6-naphthalenedicarboxylic acid. Examples of the aromatic dicarboxylic acid derivative include an aromatic dicarboxylic acid anhydride, a lower alcohol ester, and an acid halide. Examples of the lower alcohol ester include lower alkyl alcohol esters, and more specifically, linear alkyl alcohol esters or branched alkyl alcohol esters having 1 to 3 carbon atoms. Examples of the lower alkyl ester of an aromatic dicarboxylic acid include monomethyl ester, dimethyl ester, monoethyl ester, and diethyl ester. More specific examples include dimethyl isophthalate and p-benzene. Dimethyl diformate and so on. Examples of the acid halide of the aromatic dicarboxylic acid include monochloride, dichloride, monobromide, and dibromide. Among the aromatic dicarboxylic acids and their derivatives, in terms of washing durability, aromatic dicarboxylic acids and methyl esters thereof are preferred, and aromatic dicarboxylic acids having 8 to 12 carbon atoms are more preferred. And its methyl esters. Specific examples include terephthalic acid, dimethyl terephthalate, isophthalic acid, dimethyl isophthalate, phthalic acid, and dimethyl phthalate. In addition, in the present invention, a divalent aromatic carboxylic acid and a derivative thereof may be used alone or in combination.

Examples of the diol in the single body (ii) include aliphatic diols, alicyclic diols, aromatic diols, and these alkylene oxide adducts. In addition, in the present invention, the diol of the single unit (ii) may be a compound having two hydroxyl groups in the molecule, and the hydroxyl group may be an alcoholic hydroxyl group or a phenolic hydroxyl group. Examples of the aliphatic diol include an alkanediol and a polyalkanediol derived from a linear or branched alkylene. Specific examples of the aliphatic diol include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and 3-methyl -1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, Polypropylene glycol, polyoxyethylene · polyoxypropylene block copolymer, and the like. The molecular weight of the polyalkylene glycol (for example, polyethylene glycol) is not particularly limited, and may be, for example, 300 or more, 600 or 1,000, and may be, for example, 10,000 or less, 8000 or less, or 6000 or less. Examples of the alicyclic diol include 1,4-cyclohexanedimethanol, hydrogenated bisphenol A, and the like. Examples of the aromatic diol include bisphenol A, bisphenol S, and hydroquinone. Among these diols, diols having an oxyethylene group, such as polyethylene glycol, are preferred from the viewpoints of affinity with water and stability over time of processing agents for fibers. The diol may be used alone or in combination.

In the monosome (iii), the polyol having three or more hydroxyl groups may be, for example, a triol, a tetraol, or a polyol having five or more hydroxyl groups. Examples of the polyol having three or more hydroxyl groups include aliphatic polyols, alicyclic polyols, aromatic polyols, and these alkylene oxide adducts. In addition, in the polyol having three or more hydroxyl groups, the hydroxyl group may be an alcoholic hydroxyl group or a phenolic hydroxyl group. Examples of the triol include glycerol, trimethylolpropane, and these alkylene oxide adducts. Examples of the tetraol include pentaerythritol and these alkylene oxide adducts. Examples of the polyhydric alcohol having five or more hydroxyl groups include sorbitol and these alkylene oxide adducts. The polyol having three or more hydroxyl groups may be used alone or in combination.

In addition, the branched polyester resin (component (A)) may include any component other than the singular body (i) to the singular body (iii) as a copolymerization component, or may not be contained. The optional component is not particularly limited, and examples thereof include linear dicarboxylic acids such as aliphatic dicarboxylic acids or lower alcohol esters thereof (malonic acid, succinic acid, glutaric acid, adipic acid, and pimelic acid). Acid or its methyl ester, methyl malonate, methyl succinate, methyl glutarate and other side chain dicarboxylic acids, cyclohexanedicarboxylic acid and other alicyclic dicarboxylic acids, etc.).

In the fiber processing agent of the present invention, the content rate of the branched polyester resin (component (A)) is not particularly limited, and for example, it is relative to all components other than the water (component (B)). The mass may be 10 mass% or more, 20 mass% or more, or 30 mass% or more, and may be 70 mass% or less, 60 mass% or less, or 50 mass% or less. From the viewpoint of the stability of the dispersion, it is preferred that the content ratio of the branched polyester resin (component (A)) is not excessive. From the viewpoint of durable antistatic performance, it is preferred that the content ratio of the branched polyester resin (component (A)) is not too small.

The weight-average molecular weight of the branched polyester resin (component (A)) is not particularly limited. For example, it is preferably 8,000 or more, 10,000 or more, 15,000 or more, or 20,000 or more, and preferably 50,000 or less, 40,000 or less, or 35,000. Below or below 30,000.

(2) Method for producing branched polyester resin (component (A)) The method for producing the branched polyester resin (component (A)) is not particularly limited, and for example, the single body (i) to Monomers (iii) are produced by copolymerization. In addition, as described above, optional components other than the monobasic body (i) to the monobasic body (iii) may be copolymerized or not. The use amount of the single body (i) is not particularly limited, and for example, it is preferably 5 mass% or more, 10 mass% or more, or 12 mass% or more, preferably 50 mass% or less, and 30 mass% of the entire copolymerization component. Below or 20% by mass. The amount of use of the single body (ii) is also not particularly limited. For example, it is preferably 50% by mass or more, 60% by mass or more, or 70% by mass or more of the entire copolymerization component, preferably 94% by mass or less, 90% by mass. Below or 86% by mass. The amount of use of the single body (iii) is also not particularly limited. For example, it is preferably 0.05% by mass or more, 0.1% by mass or more, or 0.12% by mass or more, preferably 1% by mass or less, 0.5% by mass of the total copolymerization component. Or less or 0.3% by mass or less. The optional component may be used or not. When used, it may be, for example, 0.1% by mass or more or 1% by mass or more of the total copolymerization component, and may be 10% by mass or less or 3% by mass.

The copolymerization method is not particularly limited, either, for example, a known method or a standard method. Specifically, for example, a method may be mentioned in which the monomer (i) and a diol (eg, ethylene glycol) are subjected to an esterification reaction or a transesterification reaction in the presence of a suitable catalyst, and then the monomer (ii) ) And singular body (iii) and polycondensation reaction under reduced pressure. In the esterification reaction or transesterification reaction of the single body (i) with a diol, for example, the diol can double as a solvent. The use amount of the diol is also not particularly limited, and for example, it is preferably 80% by mass or more, 100% by mass or more, or 120% by mass or more, preferably 300% by mass or less, and 250% by mass of the monomer (i). % Or less or 200% by mass or less. The catalyst is not particularly limited, and examples thereof include zinc oxide, zinc acetate, manganese acetate, and antimony trioxide. The reaction time of the esterification reaction or transesterification reaction is also not particularly limited, and for example, it is preferably 0.3 hours or more, 0.5 hours or more, or 0.7 hours or more, and preferably 3 hours or less, 2 hours or less, or 1.5 hours or less. The reaction temperature is not particularly limited. For example, it is preferably 140 ° C or higher, 160 ° C or higher, or 170 ° C or higher, and preferably 220 ° C or lower, 200 ° C or lower, or 190 ° C or lower. In addition, in the polycondensation reaction under reduced pressure, the reaction time is not particularly limited, and for example, it is preferably 1 hour or more, 1.5 hours or more, or 2 hours or more, and preferably 8 hours or less, 5 hours or less, or 4 hours or less. . The reaction temperature is not particularly limited. For example, it is preferably 200 ° C or higher or 220 ° C or higher, and more preferably 280 ° C or lower or 260 ° C or lower. Furthermore, in the manufacturing method, the unitary body (i) may be, for example, an aromatic dicarboxylic acid ester, and the unitary body (ii) may be, for example, a polyalkylene glycol such as polyethylene glycol. Moreover, you may mix polycarboxylic acid with the branched polyester resin (component (A)) manufactured by copolymerization. Examples of the polycarboxylic acid include dicarboxylic acids. By including a dicarboxylic acid, the effect of improving antistatic performance can be obtained, for example. The dicarboxylic acid is not particularly limited, and examples thereof include oxalic acid, citric acid, tartaric acid, maleic acid, adipic acid, and salicylic acid. Examples of the polycarboxylic acid include ethylenediaminetetraacetic acid, sodium triacetate, and the like, which are compounds containing three or more carboxyl groups. When the polycarboxylic acid is mixed with a branched polyester resin (component (A)), the mass of the polycarboxylic acid is set to the content contained in the processing agent for fibers of the present invention. The content ratio of the branched polyester resin (component (A)) is mentioned.

(3) Component (B): Water The water (component (B)) is not particularly limited, and examples thereof include tap water, distilled water, and ion-exchanged water. From the viewpoint of cost, tap water and the like are preferred.

In the fiber processing agent of the present invention, the content of the water (component (B)) is not particularly limited, and may be, for example, relative to the mass of the total components other than the water (component (B)). 200 mass% or more, 400 mass% or more, or 1000 mass% or more may be 2500 mass% or less, 2000 mass% or less, or 1700 mass% or less. From the viewpoint of durable antistatic performance, it is preferred that the content of the water (component (B)) is not excessive. From the viewpoint of the stability of the dispersion, it is preferred that the content of the water (component (B)) is not too small.

(4) Component (C): Nonionic surfactant having an aromatic ring The nonionic surfactant (component (C)) having an aromatic ring is not particularly limited, and examples thereof include alkylene oxide addition of aromatic compounds. Into something. More specifically, for example, an alkylene oxide adduct of bisphenol A, an alkylene oxide adduct of styrenated phenol, an alkylene oxide adduct of β-naphthol, and an alkylene oxide of benzyl ether Adducts, etc. Examples of the alkylene oxide include ethylene oxide (EO). Examples of the styrenated phenol include tristyrenated phenol. The component (C) may be used alone or in combination.

In the fiber processing agent of the present invention, the content rate of the nonionic surfactant (component (C)) having an aromatic ring is not particularly limited, and it is, for example, other than the water (component (B)). The mass of all the components may be 15 mass% or more, 20 mass% or more, or 25 mass% or more, and may be 80 mass% or less, 70 mass% or less, or 60 mass% or less. In addition, for example, the content rate of the non-ionic surfactant (component (C)) having an aromatic ring with respect to the mass of the branched polyester resin (component (A)) may be, for example, 30% to 300% by mass. %, 50% by mass to 200% by mass, or 70% by mass to 150% by mass. From the viewpoint of durable antistatic performance, it is preferred that the content of the component (C) is not excessive. From the viewpoint of dispersibility in water, it is preferable that the content rate of the component (C) is not too small.

(5) Arbitrary component The processing agent for fibers of the present invention may contain any component other than the above-mentioned components (A) to (C), and may not contain it. Examples of the optional component include an aromatic sulfonate and the like. By including the aromatic sulfonate, for example, the effect of improving the antistatic performance of the fiber immediately after processing (in a state where it is not washed) can be obtained. The aromatic sulfonate is not particularly limited, and examples thereof include salts of sulfonic acids such as p-toluenesulfonic acid, m-xylenesulfonic acid, and cumenesulfonic acid. The aromatic sulfonate may be, for example, a salt of any metal, and may be, for example, a salt of an alkali metal (sodium, potassium, etc.), or an alkaline earth metal (calcium, magnesium, etc.). From the viewpoint of antistatic performance, the aromatic sulfonate is particularly preferably a sodium salt, and examples thereof include sodium p-toluenesulfonate, sodium m-xylenesulfonate, and sodium cumenesulfonate. Examples of the other optional components include a cationic surfactant. The inclusion of a cationic surfactant is preferred from the viewpoint of dispersibility in water. The cationic active agent is not particularly limited, and examples thereof include quaternary ammonium salts such as monoalkylammonium chloride and dialkylammonium chloride. The quaternary ammonium salt is particularly preferably dicocoalkyldimethylammonium chloride and dihardened tallow alkyldimethylammonium chloride.

In addition, in the processing agent for fibers of this invention, the content rate of the said arbitrary component is not specifically limited. When, for example, the aromatic sulfonate is added, the mass of the aromatic sulfonate may be, for example, 10% by mass or more with respect to the mass of all components other than the water (component (B)). It may be 50 mass% or more or 20 mass% or more, and may be 50 mass% or less, 45 mass% or less, or 40 mass% or less. The mass of the aromatic sulfonate may be, for example, 0.1 mass% to 10 mass% and 1 mass% to 5 with respect to the total mass of the fiber processing agent of the present invention that also includes the water (component (B)). Mass% or 1.5 mass% to 4.5 mass%. From the viewpoint of the stability of the dispersion, it is preferred that the content of the aromatic sulfonate is not excessive. Moreover, it is preferable that the content of the aromatic sulfonate is not too small from the viewpoint of improving the antistatic performance immediately after the fiber is processed (in a state where it is not washed).

In addition, the mass of the aromatic sulfonate may be, for example, 50 mass% or more, 60 mass% or more, or 70 mass% or more with respect to the mass of the nonionic surfactant (component (C)) having the aromatic ring. It can be 200 mass% or less, 160 mass% or less, or 140 mass% or less. From the viewpoint of the stability of the dispersion, it is preferred that the content of the aromatic sulfonate is not excessive. Moreover, it is preferable that the content of the aromatic sulfonate is not too small from the viewpoint of improving the antistatic performance immediately after the fiber is processed (in a state where it is not washed).

[2. Method for manufacturing processing agent for fiber] The method for manufacturing processing agent for fiber of the present invention is not particularly limited. For example, all components are mixed and all components except the water (component (B)) are dispersed in The water (ingredient (B)) may be sufficient. Specifically, it can be performed as follows, for example.

First, the branched polyester resin (ingredient (A)) and the non-ionic surfactant (ingredient (C)) having an aromatic ring are heated and mixed while dissolving. The heating temperature is not particularly limited, and may be, for example, 80 ° C or higher or 100 ° C or higher, and may be 180 ° C or lower or 160 ° C or lower. The heating time is not particularly limited, and may be, for example, 10 minutes or more or 20 minutes or more, and may be 2 hours or less or 1.5 hours or less.

On the other hand, the water (component (B)) is heated and warm water is adjusted. The temperature of the warm water is not particularly limited, and may be, for example, 40 ° C or higher or 80 ° C or higher, and may be 100 ° C or lower or 95 ° C or lower. In addition, a dissolved substance of the branched polyester resin (component (A)) and the nonionic surfactant (component (C)) having an aromatic ring is added to the warm water, and if necessary, stirring is performed to make It's scattered. At this time, the optional components (for example, aromatic sulfonate, etc.) may be added as needed. The water dispersion obtained as described above may be directly cooled and cooled to room temperature to produce the fiber processing agent of the present invention.

[3. Method of using fiber processing agent] The method of using fiber processing agent of the present invention is not particularly limited. For example, a fiber product may be immersed in the fiber processing agent of the present invention or a water dilution solution thereof, and thereafter dry. In addition, the fiber product may be extruded after being impregnated and before being dried as needed, and may also be heated during the impregnation process. By processing the fiber product in the manner described above, it is possible to appropriately impart a function (for example, an antistatic property) to the fiber product. The fiber product is not particularly limited, and examples thereof include cloth, clothing, carpet, and non-woven fabric. The type of the fiber is not particularly limited, and may be a natural fiber or an artificial fiber, and examples thereof include polyester fibers, blends of polyester fibers and other fibers. The processing agent for fibers of the present invention can be used as described above, but it can also be used as a water diluent. In the case of making a water diluent, the mass of the fiber processing agent of the present invention may be, for example, 1 mass% or more, 2 mass% or more, or 3 mass% or more, and may be 20 mass% relative to the water diluent. 15 mass% or less, or 10 mass% or less.

The application of the fiber processing agent of the present invention is not particularly limited, and it can be used, for example, in a durable antistatic agent for fibers, a water-absorbing agent, and the like. [Example]

Next, embodiments of the present invention will be described. However, the present invention is not limited to the following examples.

[Synthesis Example 1 to Synthesis Example 5] A polyester resin was synthesized (manufactured) as follows. The polyester resins in Synthesis Example 2, Synthesis Example 3, Synthesis Example 4, and Synthesis Example 5 described below are branched polyester resins copolymerized with the singular body (i) to singular body (iii), and are equivalent. Component (A) used in the fiber processing chemical | medical agent of this invention. On the other hand, the following Synthesis Example 1 is a linear polyester resin that does not copolymerize a polyol (monomer (iii)) having three or more hydroxyl groups.

(Synthesis Example 1) 60 g of dimethyl terephthalate, 90 g of ethylene glycol, and 0.3 g of zinc acetate as a catalyst were placed in a reaction container, and a transesterification reaction was performed at 180 ° C. for 1 hour. In addition, at this time, the methanol produced by the transesterification reaction was distilled away at about 140 ° C. After the transesterification reaction, 240 g of polyethylene glycol (Mw is 3,000) and ADKSTAB AO-330 (ADEKA) as an antioxidant were further added to the reaction vessel. Co., Ltd.'s product name) 2.7 g, and the temperature was reduced to 180 ° C again. Then, the temperature was increased and the pressure was reduced, and a target polyester resin was obtained by performing a condensation reaction at 240 to 250 ° C for 3 hours at 10 torr (about 1.3 × 10 ³ Pa). The weight average molecular weight (Mw) of the polyester resin was 25,000.

(Synthesis Example 2) Except using 238.4 g of polyethylene glycol (Mw: 3,000) and 0.6 g of pentaerythritol instead of 240 g of polyethylene glycol (Mw: 3,000), the same operation as in Synthesis Example 1 was performed, and obtained as Targeted branched polyester resin. The weight average molecular weight (Mw) of the polyester resin was 25,000.

(Synthesis Example 3) Except using 238.7 g of polyethylene glycol (Mw: 3,000) and 0.3 g of glycerin instead of 240 g of polyethylene glycol (Mw: 3,000), the same operation as in Synthesis Example 1 was performed, and obtained as Targeted branched polyester resin. The weight average molecular weight (Mw) of the polyester resin was 25,000.

(Synthesis Example 4) The same operation as in Synthesis Example 2 was performed except that 50 g of dimethyl terephthalate and 10 g of dimethyl isophthalate were used instead of 60 g of dimethyl terephthalate. A branched polyester resin was obtained as a target. The weight average molecular weight (Mw) of the polyester resin was 25,000.

(Synthesis Example 5) The same operation as in Synthesis Example 2 was performed, and 0.6 g of tartaric acid was mixed after the reaction to obtain the target branched polyester resin. The weight average molecular weight (Mw) of the polyester resin was 25,000.

[Examples and Comparative Examples] The processing chemicals for fibers of Examples 1 to 6 and Comparative Examples 1 to 3 were manufactured in the manner described above.

(Example 1) 3 g of the polyester resin (component (A)) obtained in Synthesis Example 2 and EO (ethylene oxide) 10 mol adduct of bisphenol A (component at 100 ° C to 120 ° C) (C)) 3 g are mixed and dissolved. The dissolved matter was added to 94 g of warm water (component (B)) at 90 ° C, and then slowly cooled to room temperature, thereby obtaining an aqueous dispersion of a polyester resin (processing agent for fibers).

(Example 2) An aqueous dispersion of a polyester resin (processing agent for fibers) was obtained in the same manner as in Example 1 except that 3 g of Na (aromatic sulfonate) m-xylene sulfonate was added to the warm water. ).

(Example 3) As component (C), an EO 16 mol adduct of tristyrenated phenol was used instead of an EO 10 mol adduct of bisphenol A, and a polyacrylic acid was obtained in the same manner as in Example 1. Aqueous dispersion of ester resin (processing agent for fiber).

(Example 4) Except that the polyester resin obtained in Synthesis Example 3 was used as the component (A), an aqueous dispersion of a polyester resin (processing agent for fibers) was obtained in the same manner as in Example 2.

(Example 5) An aqueous dispersion of a polyester resin (processing agent for fibers) was obtained in the same manner as in Example 2 except that the polyester resin obtained in Synthesis Example 4 was used as the component (A).

(Example 6) As component (A), the polyester resin obtained in Synthesis Example 5 was used, and 0.5 g of a dilong-chain alkyl group (carbon number: 12 to 18) dimethyl ammonium chloride was used instead of m-xylylene sulfonate. Except for acid Na (aromatic sulfonate), an aqueous dispersion of a polyester resin (processing agent for fibers) was obtained in the same manner as in Example 2.

(Comparative Example 1) An aqueous dispersion of a polyester resin (processing for fibers) was obtained in the same manner as in Example 1 except that 3 g of the polyester resin obtained in Synthesis Example 1 was used instead of the polyester resin obtained in Synthesis Example 2. Pharmacy).

(Comparative Example 2) An aqueous dispersion of a polyester resin (processing agent for fibers) was obtained in the same manner as in Example 1 except that the EO 10 mole adduct (component (C)) was not added with bisphenol A.

(Comparative Example 3) A polyester was obtained in the same manner as in Example 1 except that 3 g of a 10 mol adduct of lauryl alcohol EO was used instead of the EO 10 mol adduct of bisphenol A (component (C)). Water dispersion of resin (processing agent for fiber).

[Performance Evaluation] The performance of the fiber processing chemicals of Examples 1 to 6 and Comparative Examples 1 to 3 was evaluated (tested) by the following methods.

[Dispersibility in water] 80-mesh filter cloth was used to dilute the processing agents for fibers of Examples 1 to 6 and Comparative Examples 1 to 3 to 20 times (mass ratio) with water, respectively. The aqueous dispersion (5 mass% aqueous dispersion) was filtered, and the dispersibility was evaluated visually based on the presence or absence of the residue. Evaluation criteria were evaluated as follows using ○, △, or ×. ○: No residue △: Less residue ×: More residue

[Processing method of fiber] As a sample (fiber product), a cloth with a polyester dot texture (double pique) was used. The cloth was immersed in an aqueous dispersion (5 mass% water dispersion) obtained by diluting the processing agents for fibers of Examples 1 to 6 and Comparative Examples 1 to 3 with water, respectively, with water (20% by mass). Liquid). Thereafter, the cloth was extruded using a cloth rolling machine at an extrusion rate of 70%, and further dried at 130 ° C. for 2 minutes using a tenter. As described above, the cloth (fiber product) is processed by the fiber processing agent.

[Washing test] Based on the Japanese Industrial Standards (JIS) L 0217 103 method, the following washing machines and detergents were used for each of Examples 1 to 6 and Comparative Examples 1 to 3 The cloth (fiber product) processed with the fiber processing agent was subjected to a washing test. Washing machine: Fully automatic washing machine Detergent: Non-doped phosphorus (trade name of Lion Co., Ltd.)

[Antistatic performance] The cloth (fiber product) processed by the respective fiber processing agents of Examples 1 to 6 and Comparative Examples 1 to 3 was washed (not washed) and washed 5 times. Then, according to JIS L 1094 electrification test method, the antistatic performance was measured by the friction band voltage measurement method and the half-life measurement method.

The performance of each of the fiber processing chemicals of Examples 1 to 6 and Comparative Examples 1 to 3 evaluated in the manner described above is shown in Table 1 below along with the composition of the fiber processing chemicals.

[Table 1]

As shown in Table 1, the processing chemicals for fibers of Examples 1 to 6 had good dispersibility in water. Moreover, according to the processing chemicals for fibers according to Examples 1 to 6, as a result of processing the cloth (fiber product), antistatic properties were imparted. Furthermore, the cloth processed with the fiber processing chemicals of Examples 1 to 6 did not lose the antistatic performance even after being washed five times. That is, it was confirmed that the fiber processing chemicals of Examples 1 to 6 function as durable antistatic agents that are also excellent in washing durability.

On the other hand, all of the processing chemicals for fibers of Comparative Examples 1 to 3 had good dispersibility in water. Specifically, in Comparative Example 1 using the linear polyester resin of Synthesis Example 1, even when the EO 10 mol adduct of bisphenol A (a nonionic surfactant having an aromatic ring, the component (C )), The dispersion in water is not good. On the other hand, in Comparative Example 2 and Comparative Example 3, although the branched polyester resin of Synthesis Example 2 was used, no nonionic surfactant (Comparative Example 2) was added, or EO 10 mol using lauryl alcohol was added. An adduct (non-ionic surfactant having no aromatic ring) was used instead of the EO 10 mol adduct of bisphenol A (Comparative Example 3), and as a result, the dispersibility in water was not good. Therefore, in any of Comparative Examples 1 to 3, the processing agent for fibers was not attached to the cloth, and the antistatic performance and the washing durability could not be evaluated. Furthermore, in Comparative Example 2 or Comparative Example 3, the same results were obtained even if the branched polyester resin of Synthesis Example 2 was changed to the branched polyester resin of Synthesis Example 3.

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Claims (5)

A processing agent for fibers, comprising the following components (A) to (C), and the following component (A) is a copolymer obtained by polymerizing at least the monomers of the following (i) to (iii) (A) a branched polyester resin (B) water (C) a nonionic surfactant having an aromatic ring (i) at least one of a divalent aromatic carboxylic acid and a derivative thereof (ii) a diol ( iii) a polyol having three or more hydroxyl groups. The processing agent for fibers according to item 1 of the scope of patent application, wherein in the single body (i), the divalent aromatic carboxylic acid is at least one of terephthalic acid and isophthalic acid. . The processing agent for fibers according to item 1 or item 2 of the scope of patent application, wherein in the single body (ii), the diol is at least one of ethylene glycol and polyethylene glycol. The processing agent for fibers according to any one of claims 1 to 3 of the scope of patent application, further comprising an aromatic sulfonate. The processing agent for fibers according to any one of claims 1 to 4, which is a durable antistatic agent for fibers.