JP2000154467A - Finishing agent for imparting hygroscopicity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a finishing agent for imparting hygroscopicity, capable of imparting hygroscopicity excellent in washing resistance and waterproof to textiles, film or the like by including a specific hygroscopic monomer, a specific polyoxyethylene-based polyether and a metal styrenesulfonate as main ingredients. SOLUTION: This finishing agent for imparting hygroscopicity is prepared by including (A) a hygroscopic monomer (e.g. an alkali metal acylate) of the formula (wherein, X is H, a 1-4C alkyl or phenyl; Y is H, a 1-4C alkyl or a COOM; Z is H, a 1-4C alkyl or a CH2COOM; M is an alkaline earth metal of Na, Li or K), (B) a polyoxyethylene-based polyether of the formula A[(R1O)1 R2]k [wherein, A is a residue of an organic compound having 1-6 atoms of active hydrogen and >=300 molecular weight; R1 is an alkylene mainly comprising ethylene; R2 is (meth)acryloyl; (1) is a positive integer; (k) is an integer of 1-6]and (C) a metal styrenesulfonate (e.g. sodium styrenesulfonate), as main ingredients. T finishing agent has >=40 deg.C cloud point in water as a medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-absorbing agent, and more particularly, to a moisture-absorbing agent capable of imparting excellent hygroscopicity and durability to molded articles such as fibers, films and sheets.

[0002]

2. Description of the Related Art Synthetic resins such as polyesters and polyamides are widely used as molding materials for fibers, films, sheets and the like because of their many excellent properties.
However, since these resins are hydrophobic, their use in fields requiring hygroscopicity is limited.

Conventionally, attempts have been made to impart hygroscopicity to these synthetic resins, and many proposals have been made so far. For example, to synthetic fibers such as polyester fibers and polyamide fibers, cotton, natural fibers such as hemp and chemical fibers such as rayon have hygroscopicity,
As a method of trying to improve wearing comfort, etc., acrylic acid, methacrylic acid is grafted onto synthetic fibers, then sodium chloride, a method of post-processing natural proteins such as sericin and collagen on synthetic fibers, and further, There have been proposed hygroscopic synthetic fibers or the like in which a hygroscopic component such as polyalkylene glycol, polyvinylpyrrolidone, or polyetheresteramide is copolymerized or blended, or is used as a core component of a core-sheath composite fiber. However, according to these methods, it is difficult to achieve a good balance between hygroscopicity and physical properties / fastness of dyeing, and it is not practical.

Japanese Patent Application Laid-Open Nos. Hei 5-33978, Hei 6-17372 and Hei 6-17373 disclose fine porous hollow fibers having fine pores communicating from the fiber surface to the hollow part. It is disclosed that natural proteins are impregnated in pores and hollows and crosslinked and insolubilized to improve hygroscopicity. However, since the natural protein aqueous solution used here has a high viscosity and the aqueous solution may be gelled, it is extremely difficult to impregnate the hollow portion through the communication hole, and conversely, it is attempted to lower the viscosity. When the concentration of the natural protein is reduced, the amount of the natural protein finally contained in the hollow portion is reduced, and none of them can obtain sufficient hygroscopicity.

Japanese Patent Application Laid-Open No. 6-173167 discloses a core-sheath type composite fiber having a through groove parallel to the fiber axis which penetrates from the fiber surface to the hollow part by reducing the alkali and removing the core. There is disclosed a hygroscopic fiber in which a hollow fiber is formed and a hygroscopic agent formed from a monomer having a cloud point equal to or lower than the glass transition point of a polymer constituting the hollow fiber is adhered to a hollow portion of the hollow fiber.

However, in such fibers, the width and
Since a through-groove having an excessively large length is formed, there has been a problem that the hygroscopic agent easily falls off through the through-groove due to washing or the like, resulting in poor durability.

In view of such a situation, the present inventors have previously made a hollow fiber having a high hollow ratio of at least 20%, which is composed of a single polymer, Microgrooves as traces of removal exist in a state communicating with the hollow portion, and the hollow portion is formed by polymerizing and gelling a moisture absorbing component such as sodium acrylate and a crosslinking agent such as polyoxyethylene polyether. (Japanese Patent Application Laid-Open No. 8-325945). According to this hollow fiber, while having a high degree of hygroscopicity, physical properties such as fiber strength,
It is possible to provide a hygroscopic synthetic fiber which is excellent in color clarity, heat resistance, light resistance, color fastness, abrasion resistance and the like, and furthermore has excellent functional and performance in washing durability. Such a hollow fiber has a water-soluble monomer such as sodium acrylate and a cross-linking agent such as polyoxyethylene-based polyether in a monomer state in a hollow portion of a high hollow fiber having microgrooves communicating with the hollow portion. It can be obtained by polymerizing and gelling after filling.

[0008] However, in the mass production process for obtaining such hygroscopic hollow fibers, when the hollow portion is filled into a woven or knitted fabric, there is a large variation in the level of moisture absorption in the inside of the work or between the work. Occurred.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the filling of the hollow portion and the like, and reduces the variation in the moisture absorption level between the inside and the other side of the processing. To provide a processing agent, and also to provide a moisture-absorbing processing agent capable of stably imparting excellent moisture absorption properties and its durability even when processed into a molded product such as ordinary fibers, films and sheets. It is in.

[0010]

Means for Solving the Problems The present inventors have conducted various studies in order to solve the problem of the variation in the moisture absorption rate in the hollow portion filling processing. In the conventional processing agent composition, monomer metal salts such as sodium acrylate as a component, and a cross-linking agent such as polyoxyethylene-based polyether are both water-soluble to a high concentration alone, but in an aqueous medium. When both are mixed, a cross-linking agent such as polyoxyethylene-based polyether or the like easily precipitates due to salting out action of the monomer metal salt, resulting in a cloudy working fluid. And
When a padding treatment is applied to the fiber cloth using the cloudy processing liquid, when the stirring of the processing liquid in the dipping bath is insufficient, the composition of the processing liquid picked up by the fiber cloth is compared with the prepared processing liquid composition. It was analyzed that there was a tendency for more polyether crosslinker and less monomer metal salt.

On the other hand, when the working fluid in the dipping bath is sufficiently stirred, the composition of the working fluid picked up by the fiber cloth matches the composition of the prepared working fluid, but the composition of the fiber during the nip by a mangle or the like is reduced. It has been found that the composition of the working fluid that is squeezed and removed from the fabric has less polyether crosslinker and more monomer metal salt than the prepared working fluid composition. That is, it was found that the polyether cross-linking agent, which is a cloudy component in the working fluid, was selectively adsorbed on the fiber cloth. Furthermore, it has been verified that the phenomenon of the selective adsorption also occurs when the working fluid transfers to the hollow portion of the hollow fiber. The present inventors have conducted intensive studies based on these findings, and have clarified that these selective adsorption phenomena have caused the problem of variation in the moisture absorption rate in the hollow portion filling processing.

The problem of selective adsorption has not been solved even if the dispersion stability of the working fluid is improved by using a dispersant such as polyvinyl alcohol. The present inventors have considered the above findings,
It is thought that there is no solution other than to convert the working fluid into a transparent solution in order to solve this problem, and an alkali metal acrylate (Na, K, Li) is used as a monomer metal salt, and a polyether crosslinking agent is used. As polyethylene glycol dimethacrylate (molecular weight of polyethylene glycol:
(400, 600, 1000) using a water-based medium as a transparent solution. As a result, surprisingly, despite the system in which the polyether cross-linking agent cannot be dissolved only by adding a small amount of the polyether cross-linking agent to the transparent aqueous solution of the monomer metal salt and becomes a cloudy processing liquid, When the addition amount of the polyether crosslinking agent was further increased, it was found that there was a concentration region where the solution became a transparent solution again. This is thought to be due to some interaction between the monomer metal salt and the polyether crosslinking agent.

[0013] As a result of further experiments, it was found that the concentration range in which such a transparent solution was formed was such that the metal species of the monomer metal salt was N
By changing a → K → Li, the polyethylene glycol molecular weight of the polyether crosslinking agent is changed from 400 → 60.
It has been found that enlargement is achieved by increasing the value from 0 to 1000. Then, when the cloud point of the clarifying processing liquid is 40 ° C. or higher, the above-described problem of the selective adsorption is solved, and when applied to the hollow portion filling processing, the variation in the moisture absorption rate between the processing and the processing is reduced. Confirmed that it will disappear. In addition, according to the clearing processing liquid having a cloud point of 40 ° C. or higher, even when processed into ordinary solid fibers or films or sheets, uniform processing is possible, and the level of hygroscopicity is higher, It has been proposed to the inventors that the variation in the moisture absorption rate is smaller and the washing durability and the water resistance of the moisture absorption property are more excellent (Japanese Patent Application No. Hei.
-258485). The present inventors have studied the effect of adding an organic sulfonic acid metal salt such as methsulfonic acid Na, 2-acrylamido-2-methylpropanesulfonic acid Na, and styrenesulfonic acid Na to the above-mentioned moisture absorbing agent. As a result, it has been found that, among such sulfonic acid metal salts, only a styrene sulfonic acid metal salt specifically brings a remarkable increase in cloud point with a relatively small amount of addition. The present invention has been completed as a result of further studies based on such findings.

That is, the present invention comprises a hygroscopic monomer represented by the following general formula (1), a polyoxyethylene polyether represented by the following general formula (2), and a metal salt of styrene sulfonic acid as main components. A moisture absorbing agent using water as a medium, wherein the moisture absorbing agent has a cloud point of 40 ° C. or higher.

[0015]

Embedded image

(Wherein X is a hydrogen atom, having 1 to 4 carbon atoms)
An alkyl group or a phenyl group, Y is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a -COOM group, Z is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or -C
H ₂ COOM group, M represents a metal)

[0017]

Embedded image

(Wherein A is an organic compound residue having an active hydrogen of 1 to 6 and a molecular weight of 300 or less, R ¹ is an alkylene group mainly composed of an ethylene group, R ² is an acryloyl group or a methacryloyl group. May be a hydrogen atom or a lower alkyl group, l is a positive integer, and k is 1 to
6 indicates an integer)

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The hygroscopic monomer used in the present invention is represented by the general formula (1). In the general formula (1), X is
A hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and among the alkyl groups, a methyl group is preferable. Y is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms,
Alternatively, it is a -COOM group, and among the alkyl groups, a methyl group is preferable. Z is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a —CH ₂ COOM group, and is preferably a hydrogen atom or a —CH ₂ COOM group.
M is a metal, and particularly, it is preferable to use an alkali metal such as Na, K, or Li because the hygroscopicity can be remarkably improved. Further, Li and Li are preferable in that the composition region where the cloud point is 40 ° C. or higher is wide. K is more preferred, and Li is most preferred. Also, a part of M, preferably [COO
H] / {[COOM] + [COOH]} may be a hydrogen atom in a proportion of 30 mol% or less, which is rather preferable from the viewpoint of washing durability and water resistance.

Preferred specific examples of such a hygroscopic monomer include Li salt, K salt and Na salt of acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, maleic acid, fumaric acid, citraconic acid, mesaconic acid and itaconic acid. Etc. can be given. These hygroscopic monomers may be used alone or in combination of two or more.

Further, in the moisture absorbing agent of the present invention,
In addition to the hygroscopic monomer, it acts as a crosslinking agent during the polymerization of the hygroscopic monomer and imparts washing durability and water resistance to the finally obtained polymer bulk or polymer film. The represented polyoxyethylene-based polyether is contained as an essential component.

In the above formula (2), A is a residue of an organic compound having an active hydrogen of 1 to 6 and a molecular weight of 300 or less, and methanol, propanol, butanol, phenol, ethylene glycol, bisphenol A, propylene glycol, butylene Residues of hydroxyl group-containing compounds such as glycol, butanediol, neopentyl glycol, glycerin, trimethylolpropane, triethanolamine, diglycerin, pentaerythritol, sorbitol, and primary and secondary such as ethylenediamine, hexamethylenediamine, diethylenetriamine Examples thereof include residues of amines. Among them, a hydroxyl group-containing compound is preferable.

R ¹ may be mainly an ethylene group, and may be partly another alkylene group such as a propylene group or a butylene group as long as the polyoxyethylene-based polyether (2) is water-soluble. , R ² is an acryloyl group or a methacryloyl group, a part of which is a hydrogen atom or a methyl group;
It may be a lower alkyl group such as an ethyl group, a propyl group or a butyl group.

K is an integer of 1 to 6 corresponding to the number of active hydrogen atoms of the organic compound as a source of Z. Also, l
Is a positive integer and may be the same or different between or within molecules. If the value of l is too large, the viscosity of the aqueous solution becomes high, and it may be difficult to perform uniform processing. Therefore, it is preferable that the k × l value is 80 or less.

Preferred examples of such polyoxyethylene polyethers include polyethylene glycol (average molecular weight: 400) di (meth) acrylate, polyethylene glycol (average molecular weight: 600) di (meth) acrylate, and polyethylene glycol (average molecular weight: 600). (Average molecular weight: 1000) di (meth) acrylate, methoxypolyethylene glycol (average molecular weight: 1320) mono (meth) acrylate, bisphenol A ethylene oxide 30 mol adduct di (meth) acrylate, glycerin ethylene oxide adduct di (meth) acrylate A) acrylate, tri (meth) acrylate of glycerin ethylene oxide adduct, di (meth) acrylate of trimethylolpropane ethylene oxide adduct, trimethylolpropane ethylene oxide Tri Side adduct (meth)
Acrylate, di (meth) acrylate of sorbitol ethylene oxide adduct, tri (meth) acrylate of sorbitol ethylene oxide adduct, tetra (meth) acrylate of sorbitol ethylene oxide adduct, penta (meth) acrylate of sorbitol ethylene oxide adduct and Hexa (meth) acrylate of sorbitol ethylene oxide adduct can be mentioned. Among them, polyethylene glycol (average molecular weight: 1000) di (meth) acrylate is most preferred in that the composition range in which the cloud point is 40 ° C. or higher is wide. It can be mentioned as preferred. Such water-soluble polyoxyethylene-based polyethers may be used alone or in a combination of two or more.

Further, the moisture-absorbing agent of the present invention contains a metal salt of styrene sulfonic acid as an essential component as a cloud point control agent. As such a metal salt of styrene sulfonic acid, an alkali metal salt of styrene sulfonic acid is particularly preferable from the viewpoint of the effect of increasing the cloud point. Particularly preferred examples include sodium styrenesulfonate, potassium styrenesulfonate, and lithium styrenesulfonate.

Further, such a moisture absorbing agent used in the present invention uses water as a medium and does not use an organic solvent or the like, so that it can be used safely in a general processing plant.

Next, the moisture absorbing agent of the present invention must have a cloud point of 40 ° C. or higher, preferably 50 ° C. or higher, and more preferably 60 ° C. or higher. If the cloud point is less than 40 ° C., uniform and reproducible processing cannot be performed, and the surface of the moisture absorption level, the variation of the moisture absorption, the washing durability of the moisture absorption, the water resistance and the hand Insufficient surface is not preferred.

In the moisture absorbent of the present invention, the kinds and types of the moisture absorbent monomer, the polyoxyethylene polyether, and the metal salt of styrene sulfonic acid are adjusted so that the cloud point is 40 ° C. or higher as described above. The concentration may be appropriately selected.
The concentration of the moisture absorbent monomer is preferably in the range of 2 to 40% by weight, and more preferably in the range of 5 to 30% by weight. The concentration of the polyoxyethylene polyether is 5 to 40.
% By weight, more preferably from 7 to 30% by weight. The concentration of the metal styrenesulfonate is preferably in the range of 0.1 to 30% by weight, more preferably 0.5 to 30% by weight.
A range of 20% by weight is more preferred.

Further, the moisture-absorbing processing agent of the present invention may contain a polymerization initiator, if necessary, and this is rather preferable for performing a sufficient polymerization crosslinking reaction during processing. Examples of such a polymerization initiator include peroxides such as potassium persulfate, ammonium persulfate, hydrogen peroxide and benzoyl peroxide; cerium ammonium salts such as ceric ammonium sulfate and ceric ammonium nitrate; α'-azobisisobutyronitrile and the like.

The moisture-absorbing agent of the present invention comprises fibers, films,
It can be used for a sheet or the like. For example, in the case of a fiber, it can be applied to any stage of raw cotton, yarn, woven or knitted fabric, or the like. As the processing method, a conventionally known processing method such as a dipping method, a pad drying method, a pad steam curing method, a coating method, a laminating method, and a heating method in a bath can be arbitrarily adopted. Among them, those using polyester hollow fibers having communication holes or microgrooves are preferable in terms of their washing durability and durability, and have a great effect of reducing the variation in the moisture absorption rate.

As such a polyester hollow fiber, a known hollow fiber is used. For example, as described in JP-A-8-325945, it can be obtained by using a spinneret composed of an assembly of a plurality of slits. That is, a spinneret having a small gap (called a canal) between adjacent slit ends is used, and the polymer discharged from the slit is joined by a ballast effect at a portion corresponding to the canal, thereby forming a hollow fiber. After the cloth made of such a polyester hollow fiber is reduced in alkali, a micro groove extending intermittently in the longitudinal direction of the fiber is formed on the side surface of the hollow fiber.

[0033]

The moisture absorbing agent of the present invention has a cloud point of 40
Since the solution is a transparent solution at a temperature of at least ℃, for example, the processing liquid is transparent even in a processing step such as padding in summer, and a hygroscopic monomer component, a polyoxyethylene-based polyether, and a metal styrene sulfonate as constituent components. There is no problem such as selective adsorption between the salts, and even if a hollow fiber having the above-mentioned hollow portion is used and the hollow portion is filled, the processing is performed in the inner side of the processing, between the processing side and the like. There is no variation in the moisture absorption rate, and a high moisture absorption rate and washing durability thereof can be achieved. In addition, even when processing is performed on molded products such as ordinary fibers, films and sheets, there is no problem of selective adsorption and the like, so that excellent moisture absorption and durability thereof can be stably imparted.

[0034]

According to the moisture-absorbing agent of the present invention, high hygroscopicity with excellent washing durability and water resistance can be stably imparted to fibers, films, sheets and the like. It is extremely useful in clothing, such as inners, nighties, blouses, shirts, sportswear, and the like, which require wear comfort and moisture absorption, and in non-clothing applications, such as water-related products.

[0035]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention. Parts and% in the examples represent parts by weight and% by weight, respectively, and the moisture absorption and washing durability were measured by the following methods.

(1) Moisture Absorption Rate After pre-drying the sample at 50 ° C. for 2 hours,
It was absolutely dried for 2 hours at a temperature of 05 ° C. (the weight at this time is W ₀ ). Then, Temperature: 35 ° C., the weight after leaving for 2 hours was measured (the W ₁₎ in a constant temperature and humidity chamber of RH 95%, was calculated moisture absorption rate by the following equation. Moisture absorption (%) = {(W ₁ −W ₀ ) / W ₀ } × 100

(2) Washing durability According to JIS L-1018-77 6.36 H method,
The washing was evaluated after repeating 30 times.

Example 1 Melt spinning was performed using a spinneret having a spinning hole having an arc-shaped opening in which four circular slits were closed, and a polyethylene terephthalate (dioxide) having an intrinsic viscosity of 0.61 was used. An undrawn yarn of hollow fiber composed of 0.07% of titanium) was drawn according to a conventional method to obtain a multifilament yarn (35 denier / 12 filaments) having a round hollow section with a hollow ratio of 40%. . After knitting a 36 gauge tricot half knitted fabric using this hollow multifilament yarn and refining it according to a conventional method,
Temperature in an aqueous solution of 50 g / l sodium hydroxide:
The fabric was treated at 105 ° C. for 10 minutes to form a knitted fabric having a weight loss rate of 20%, and then dyed under the following conditions (unprocessed cloth). Mikawhite KTN conc (manufactured by Nippon Kayaku): 1% owf acetic acid: 0.3 g / liter Disper VG (manufactured by Meisei Chemical): 0.5 g / liter Staining time and time: 130 ° C. × 30 minutes

After dyeing, soaping is carried out and then at a temperature of 1
Dry at 00 ° C. for 5 minutes. When the multifilament yarn was taken out from the obtained knitted fabric and its surface was observed with a scanning electron microscope, the length per 100 μm in the fiber axis direction was
At least one slit having a width of 1.0 to 1.5 μm and a length of 50 to 150 μm was present.

Next, the knitted fabric was subjected to room temperature (29
C) under a transparent working fluid (cloud point 68 ° C)
It was squeezed so that the amount of the working liquid adhered to the knitted fabric was 100%, then sealed in a polyethylene bag, and then allowed to stand at a temperature of 30 ° C. for 2 days. (Working liquid composition) Na acrylate 12% Acrylic acid 3% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Na styrene sulfonate 8% Potassium persulfate 0.5% Water 66.5%

After two days have elapsed, the knitted fabric is taken out of the polyethylene bag, immersed in hot water at 100 ° C. for 5 minutes while rocking, and subsequently air-dried.
After drying at 20 ° C. for 1 minute, final setting was performed at a temperature of 180 ° C. for 1 minute to obtain a processed fabric.

The weight increase of the knitted fabric due to such a series of hollow portion filling processings, that is, the filling ratio is 16% (vs. unprocessed cloth). As a result of observing the knitted fabric with a scanning electron microscope, the solid content was reduced. It was present only in the hollow portion of the hollow fiber, and was not attached at all to the outer surface of the fiber, the interfiber space, or between the tissues. For this reason, the obtained processed fabric exhibited a soft feeling and touch as soft as an unprocessed product. The average value of the moisture absorption (n = 1) when such a series of hollow filling processing is repeated 10 times is performed.
0) and R (maximum value-minimum value) were as shown in Table 1, and the variation in the moisture absorption was very small.

Comparative Example 1 The following composition was used at room temperature (2) instead of the transparent working fluid (cloud point 68 ° C.) used in Example 1.
Except for using a working liquid (cloud point of less than 10 ° C.) that became cloudy at 9 ° C.), a processed fabric was obtained in the same manner as in Example 1. The processed fabric was evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 1. (Working liquid composition) Na acrylate 20% Acrylic acid 5% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Potassium persulfate 0.5% Water 64.5%

[Comparative Example 2] A room temperature (29%) having the following composition was used in place of the transparent processing liquid (cloud point 68 ° C) used in Example 1.
℃), a working cloth was obtained in the same manner as in Example 1 except that a working liquid (cloud point: 20 ° C) which became cloudy under the temperature was used. The processed fabric was evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 1. (Working liquid composition) Na acrylate 16% Acrylic acid 4% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Na styrene sulfonate 4% Potassium persulfate 0.5% Water 65.5%

Example 2 The room temperature (2) of the following composition was used in place of the transparent working fluid (cloud point 68 ° C.) used in Example 1.
9 ° C.), except that a transparent working fluid (cloud point 51 ° C.) was used. However, the polyethylene glycol dimethacrylate was changed to the polyethylene glycol (average molecular weight: 600) dimethacrylate used in Example 1 instead of NP Visomer P10W manufactured by ISC UK.
(A 60% aqueous solution of polyethylene glycol (average molecular weight: 1000) dimethacrylate) was used in the same amount as polyethylene glycol dimethacrylate solid content. The obtained processed fabric was evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 1. (Working liquid composition) Na acrylate 16% Acrylic acid 4% NP bioisomer P10W (solid content) 10% Na styrene sulfonate 4% Potassium persulfate 0.5% Water 65.5%

Comparative Example 3 The room temperature (2) of the following composition was used in place of the transparent processing liquid (cloud point 51 ° C.) used in Example 2.
(9 ° C.) under the same conditions as in Example 2 except that a processing liquid (cloud point: 25 ° C.) which became cloudy under the same conditions was used. The obtained processed fabric was evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 1. (Working fluid composition) Na acrylate 20% Acrylic acid 5% NP biisomer P10W (solid content) 10% Potassium persulfate 0.5% Water 64.5%

Example 3 A room temperature (29%) having the following composition was used in place of the transparent working fluid (cloud point 68 ° C.) used in Example 1.
° C), and a working cloth was obtained in the same manner as in Example 1 except that a transparent working liquid (cloud point: 43 ° C) was used. The obtained processed fabric was evaluated in the same manner as in Example 1, and the evaluation results are shown in Table 1. (Working fluid composition) Li acrylate 13% Acrylic acid 4% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Na styrene sulfonate 4% Potassium persulfate 0.5% Water 68.5%

Comparative Example 4 The room temperature (2) of the following composition was used in place of the transparent processing liquid (cloud point 43 ° C.) used in Example 3.
A working cloth was obtained in the same manner as in Example 3 except that a working liquid (cloud point: 10 ° C) which became cloudy under the temperature of 9 ° C) was used. The obtained processed fabric was evaluated in the same manner as in Example 3, and the evaluation results are shown in Table 1. (Working liquid composition) Li acrylate 16% Acrylic acid 5% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Potassium persulfate 0.5% Water 68.5%

Example 4 The room temperature (2) of the following composition was used in place of the transparent working fluid (cloud point 43 ° C.) used in Example 3.
9 ° C.), except that a transparent working liquid (cloud point: 80 ° C.) was used. However, as the polyethylene glycol dimethacrylate, instead of the polyethylene glycol (average molecular weight 600) dimethacrylate used in Example 3, NP Visomer P10W (polyethylene glycol (average molecular weight 10
00) A 60% aqueous solution of dimethacrylate) was used in the same amount as polyethylene glycol dimethacrylate solids. The obtained processed fabric was evaluated in the same manner as in Example 3, and the evaluation results are shown in Table 1. (Working fluid composition) Li acrylate 13% Acrylic acid 4% NP biisomer P10W (solid content) 10% Na styrene sulfonate 4% Potassium persulfate 0.5% Water 68.5%

Example 5 The room temperature (2) of the following composition was used in place of the transparent working fluid (cloud point 80 ° C.) used in Example 4.
9 ° C.), except that a transparent working liquid (cloud point above 100 ° C.) was used, to obtain a work cloth in the same manner as in Example 4. However, as the styrene sulfonic acid metal salt, Li styrene sulfonic acid was used instead of Na styrene sulfonic acid used in Example 4. The obtained processed fabric was evaluated in the same manner as in Example 4, and the evaluation results are shown in Table 1. (Working fluid composition) Li acrylate 13% Acrylic acid 4% NP visomer P10W (solid content) 10% Listyrene sulfonic acid 4% Potassium persulfate 0.5% Water 68.5%

Example 6 A plain woven fabric woven using a multifilament yarn (solid yarn having a round cross section, 50 denier / 24 filaments) composed of regular polyethylene terephthalate (a titanium dioxide content of 0.07%) was used. After refining and presetting according to a conventional method, dyeing was performed under the following conditions (unprocessed cloth). Mikawhite KTN conc (manufactured by Nippon Kayaku): 1% owf acetic acid: 0.3 g / liter Disper VG (manufactured by Meisei Chemical): 0.5 g / liter Staining temperature and time: 130 ° C. × 30 minutes

After dyeing, soaping was performed, followed by drying and heat setting. Next, the woven fabric is immersed in a transparent working fluid (cloud point 68 ° C.) at room temperature having the following composition and then squeezed with a mangle so that the amount of the working fluid adhered to the woven fabric is 80%. At 120 ° C. for 2 minutes. After drying, it was treated with a steamer at a temperature of 100 ° C. for 3 minutes, washed with hot water and dried, and then treated at a temperature of 180 ° C. for 1 minute. (Working liquid composition) Na acrylate 12% Acrylic acid 3% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Na styrene sulfonate 8% Potassium persulfate 0.5% Water 66.5%

The weight increase of the woven fabric due to such processing, that is, the adhesion ratio was 9.0% (vs. unprocessed cloth). The obtained woven fabric (processed fabric) exhibited a good feeling and touch equivalent to that of the unprocessed fabric. The results of the average value (n = 10) and R (maximum value−minimum value) of the moisture absorption rate of each of the processed fabrics when this processing was repeated 10 times are as shown in Table 1, and the results are shown in Table 1. The variation was very small.

Comparative Example 5 The room temperature (2) of the following composition was used in place of the transparent working fluid (cloud point 68 ° C.) used in Example 6.
(9 ° C.) under the same conditions as in Example 6 except that a working liquid (cloud point less than 10 ° C.) which became cloudy was used. The average value of moisture absorption and R were as shown in Table 1, and the texture of the obtained work cloth was hard. (Working liquid composition) Na acrylate 20% Acrylic acid 5% Polyethylene glycol (average molecular weight 600) dimethacrylate 10% Potassium persulfate 0.5% Water 64.5%

[0055]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06M 15/53 D06M 15/53 // D06M 101: 32 F term (Reference) 4J002 CH051 DE027 EG026 EV236 FD207 GK02 4J011 CA01 CA03 CA08 CC02 CC08 PA88 PB04 PB08 PC02 PC13 4L033 AC07 BA32 CA13 CA20 CA48

Claims (5)

[Claims] 1. A water-absorbing monomer represented by the following general formula (1), a polyoxyethylene-based polyether represented by the following general formula (2), and a metal salt of styrene sulfonic acid as main components, and water as a medium. Wherein the clouding point of the moisture absorbing agent is 40 ° C. or higher. Embedded image (In the formula, X is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and Y is a hydrogen atom, 1 to 1 carbon atoms.
4, an alkyl group or a -COOM group, Z is a hydrogen atom,
An alkyl group having 1 to 4 carbon atoms, or —CH ₂ COO
M group, M represents a metal. ) (Where A is an organic compound residue having an active hydrogen of 1 to 6 and a molecular weight of 300 or less, R ¹ is an alkylene group mainly composed of an ethylene group, R ² is an acryloyl group or a methacryloyl group, and May be a hydrogen atom or a lower alkyl group, l is a positive integer, and k is an integer of 1 to 6.) 2. The moisture-absorbing agent according to claim 1, wherein the moisture-absorbing monomer is an alkali metal acrylate. 3. The moisture-absorbing agent according to claim 2, wherein the hygroscopic monomer is at least one selected from sodium acrylate, lithium acrylate and potassium acrylate. 4. The water-soluble polyoxyethylene-based polyether is polyethylene glycol di (meth) acrylate or di (meth) glycerol ethylene oxide adduct.
Acrylate, tri (meth) acrylate of glycerin ethylene oxide adduct, di (meth) acrylate of trimethylolpropane ethylene oxide adduct, tri (meth) acrylate of trimethylolpropane ethylene oxide adduct, di (meth) acrylate of sorbitol ethylene oxide adduct (Meth) acrylate, tri (meth) acrylate of sorbitol ethylene oxide adduct, tetra (meth) acrylate of sorbitol ethylene oxide adduct
The acrylate is at least one selected from the group consisting of penta (meth) acrylate of sorbitol ethylene oxide adduct and hexa (meth) acrylate of sorbitol ethylene oxide adduct.
The moisture absorbent according to any one of claims 1 to 3. 5. The moisture-absorbing agent according to claim 1, wherein the metal styrenesulfonate is sodium styrenesulfonate.