JP2002265632A - Electrolyte aqueous solution absorber and method for producing the same - Google Patents

Abstract

(57) [Summary] [Problem] The present invention is inexpensive, highly safe, and
It is an object of the present invention to provide an electrolyte aqueous solution absorber that has a wide range of application and is less likely to lose its shape during transportation and storage, and a method for producing the same. SOLUTION: An aqueous electrolyte solution absorbent comprising an electrolyte aqueous solution absorbing polymer comprising a water-insoluble polymer into which a hydrophilic polar group is introduced, and a support, and a hydrophilic group is added to the water-insoluble polymer. A method for producing an aqueous electrolyte solution absorbent, characterized in that a water-permeable bag-like body is filled with an aqueous electrolyte solution-absorbing polymer that can be obtained by introducing a polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent capable of absorbing various aqueous electrolyte solutions, and more particularly to an aqueous electrolyte solution absorbent that is less likely to lose its shape during transportation and storage, and a method for producing the absorbent.

[0002]

2. Description of the Related Art Current electrolyte absorbing polymers are usually
To monomers that have the ability to dissolve in the target electrolyte,
It is generally manufactured by adding a crosslinking monomer and polymerizing. In this case, the raw material monomer is often relatively expensive, and also after polymerization, the raw material monomer remains unpolymerized and partially remains in the product.
There are problems in terms of price and safety. In addition, the current electrolyte-absorbing polymer is designed and manufactured with only the target of absorbing a specific electrolyte as the target, so the absorption capacity for electrolytes of non-target types is extremely reduced. .
However, in practical use, it is very often required to simultaneously absorb a plurality of types of electrolytes. Therefore, an electrolyte-absorbing polymer having a wide application range is strongly desired. Furthermore, in order to improve the handling properties of the electrolyte aqueous solution absorber during transportation and storage, further improvement is desired so that the absorber is less likely to lose its shape during transportation and storage.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an aqueous electrolyte solution which is inexpensive, has high safety, has a wide range of applications, and is less likely to lose its shape during transportation and storage. An object of the present invention is to provide an absorber and a method for producing the same. Further, in the present invention, the weight and volume are small during transportation, and the weight and volume of the electrolyte solution are absorbed during use, and the function of following the shape of the outer shape is sufficiently satisfied. The purpose is to provide. Furthermore, the present invention aims to contribute to the global environment by using polymer waste such as a water-insoluble polymer or inorganic solid waste such as metal or ceramic, which has been difficult to treat as waste. I do.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on the achievement of the above-mentioned object, and as a result, have found that an aqueous electrolyte solution-absorbing polymer which can be obtained by introducing a hydrophilic polar group into a water-insoluble polymer. It has been found that the use of a solution can provide an electrolyte aqueous solution absorber having high safety and a wide range of application. In particular, they found that by using used polymers or waste materials as water-insoluble polymers as raw materials, they could be effectively reused, contribute to the global environment, and supply inexpensive products. .

The inventors of the present invention have further studied the shape collapse during transportation and storage of the electrolyte aqueous solution absorber. As a result, it has been found that if a support is present together with the absorber, the shape collapse is difficult during transportation and storage. I got In particular, it has been found that if the electrolyte aqueous solution-absorbing polymer is supported by the support, the shape collapse during transportation and storage can be further prevented. We have:
After further studies, the present invention was completed.

That is, the present invention provides (1) an aqueous electrolyte solution absorber comprising an aqueous electrolyte solution absorbing polymer comprising a water-insoluble polymer having a hydrophilic polar group introduced therein, and a support. 2) The electrolyte aqueous solution absorber according to the above (1), wherein the support is a flexible network, and (3) the electrolyte aqueous solution polymer is supported by the support. (4) the hydrophilic polar group may form a sulfo group which may form a salt, a sulfate group which may form a salt, or a salt; —PO (OH) _{2 which} may form a carboxyl group, an amide group, a nitro group, or a salt
At least one of a group, a -OPO (OH) ₂ group which may form a salt, a hydroxyl group which may form a salt, and an amine base which may form a salt. (1) wherein the amount of the hydrophilic polar group is 0.1 to 99 mol% with respect to all monomer units in the water-insoluble polymer. And (6) the water-insoluble polymer has at least one of an aromatic ring and a conjugated diene in a main chain and / or a side chain. (7) at least one of the aromatic ring and the conjugated diene contained in the water-insoluble polymer is 1 to 100 mol% based on all monomer units in the polymer. Electrolyte water according to the above (6) (8) The electrolyte aqueous solution absorber according to the above (1), wherein the solid substance having a specific gravity of 1 or more is more than natural minerals. (10) The electrolyte aqueous solution absorbent according to (8), wherein the solid substance having a specific gravity of 1 or more is made of waste. 11) The electrolyte aqueous solution absorber according to the above (8), wherein the solid having a specific gravity of 1 or more is formed by binding waste.
(12) The electrolyte aqueous solution absorbent according to (8), wherein the solid having a specific gravity of 1 or more is made of magnetic waste.

Further, the present invention provides (13) an aqueous electrolyte solution absorbing polymer comprising a used water-insoluble polymer having a hydrophilic polar group introduced therein and a support. (14) The electrolyte aqueous solution absorber according to the above (13), wherein the support is a flexible network, and (15) the electrolyte aqueous solution polymer is supported by the support. (13) wherein the hydrophilic polar group forms a sulfo group which may form a salt, a sulfate group which may form a salt, or a salt. Carboxyl group, amide group, nitro group, -PO (OH) ₂ group which may form a salt, -OPO which may form a salt
(13) The electrolyte aqueous solution absorbent according to the above (13), which is at least one of (OH) ₂ groups, a hydroxyl group which may form a salt, and an amine base which may form a salt. (17) The absorbent for an aqueous electrolyte solution according to the above (13), wherein the hydrophilic polar group accounts for 0.1 to 99 mol% based on all monomer units in the water-insoluble polymer. The water-soluble polymer has at least one kind of an aromatic ring and a conjugated diene in a main chain and / or a side chain thereof, wherein the electrolyte aqueous solution absorber according to the above item (13), (19) a water-insoluble polymer At least one of the aromatic ring and the conjugated diene contained therein accounts for 1 to 100 mol% based on all monomer units in the polymer.
(20) The electrolyte aqueous solution absorber according to (13), further comprising a solid having a specific gravity of 1 or more. (21) The electrolyte aqueous solution absorbent according to the above (20), wherein the solid having a specific gravity of 1 or more is made of a natural mineral, and (22) the solid having a specific gravity of 1 or more is made of waste. (23) The electrolyte aqueous solution absorbent according to the above (20), wherein (23) the solid substance having a specific gravity of 1 or more is formed by binding waste.
(24) The electrolyte aqueous solution absorber according to (20), wherein the solid having a specific gravity of 1 or more is made of magnetic waste.

Further, the present invention is characterized in that (25) a water-permeable bag is filled with an electrolyte aqueous solution-absorbing polymer obtainable by introducing a hydrophilic group into a water-insoluble polymer and a support. A method for producing an electrolyte aqueous solution absorber,
6) The method for producing an electrolyte aqueous solution absorber according to the above (25), wherein the support is a flexible network.
7) The method for producing an electrolyte aqueous solution absorber according to the above (25), wherein the electrolyte aqueous solution absorbing polymer is supported by a support, and (28) the hydrophilic polar group forms a salt. A sulfo group, a sulfuric acid group which may form a salt, a carboxyl group which may form a salt, an amide group, a nitro group and -PO (OH) _{2 which} may form a salt
At least one of a group, a -OPO (OH) ₂ group which may form a salt, a hydroxyl group which may form a salt, and an amine base which may form a salt. (29) The method for producing an aqueous electrolyte solution absorbent according to the above (25), wherein (29) the hydrophilic polar group accounts for 0.1 to 99 mol% with respect to all monomer units in the water-insoluble polymer. (25) The method for producing an electrolyte aqueous solution absorbent according to (25), wherein (30) the water-insoluble polymer comprises a main chain and / or
Alternatively, the method for producing an electrolyte aqueous solution absorber according to the above (25), wherein the side chain has at least one kind of an aromatic ring and a conjugated diene; (31) aromatic contained in the water-insoluble polymer At least one of the ring and the conjugated diene is one to one monomer unit in the polymer;
(30) The method for producing an electrolyte aqueous solution absorbent according to the above (30), wherein a solid having a specific gravity of 1 or more is filled in a water-permeable bag. (25) The method for producing an aqueous electrolyte solution absorbent according to (32), wherein the solid substance having a specific gravity of 1 or more is made of a natural mineral. (34) The method for producing an electrolyte aqueous solution absorber according to the above (32), wherein the solid having a specific gravity of 1 or more is made of waste. (35) The solid having a specific gravity of 1 or more binds the waste. (32) The method for producing an electrolyte aqueous solution absorber according to the above (32), wherein the solid substance having a specific gravity of 1 or more is made of magnetic waste. ). Production method, related to.

Further, the present invention provides (37) filling a water-permeable bag with an electrolyte aqueous solution-absorbing polymer obtainable by introducing a hydrophilic group into a used water-insoluble polymer and a support. (38) The method for producing an electrolyte aqueous solution absorber according to the above (37), wherein the support is a flexible network, and (39) the electrolyte aqueous solution. (37) The method for producing an electrolyte aqueous solution absorbent according to (37), wherein the absorbing polymer is supported by a support, (40) a sulfo group in which the hydrophilic polar group may form a salt , A sulfuric acid group which may form a salt, a carboxyl group which may form a salt, an amide group, a nitro group and a salt which may form-
PO (OH) ₂ groups, -OPO (O
H) The production of the aqueous electrolyte solution absorbent according to the above (37), wherein at least one of _two groups, a hydroxyl group which may form a salt, and an amine base which may form a salt is at least one. Method (41) wherein the hydrophilic polar group is contained in an amount of 0.1 to 99 relative to all monomer units in the water-insoluble polymer.
(37) The method for producing an electrolyte aqueous solution absorbent according to the above (37), wherein the water-insoluble polymer has at least one of an aromatic ring and a conjugated diene in a main chain and / or a side chain. (3)
7) The method for producing an electrolyte aqueous solution absorbent according to 7), (43) at least one of an aromatic ring and a conjugated diene contained in the water-insoluble polymer is 1 to 100 mol based on all monomer units in the polymer. %, The method for producing an electrolyte aqueous solution absorbent according to the above (42),
(44) The method for producing an electrolyte aqueous solution absorber according to the above (37), wherein a solid having a specific gravity of 1 or more is filled in a water-permeable bag. (44) The method for producing an electrolyte aqueous solution absorbent according to the above (44), which comprises a natural mineral;
(4) The method for producing an electrolyte aqueous solution absorbent according to the above (44), wherein the solid substance is a waste.
7) The method for producing an electrolyte aqueous solution absorbent according to the above item (44), wherein the solid having a specific gravity of 1 or more is formed by binding wastes. (48) The solid having a specific gravity of 1 or more is magnetic. (4) characterized by comprising a waste having
4) A method for producing an electrolyte aqueous solution absorber according to 4).

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. Hereinafter, as an electrolyte aqueous solution absorber to which the present invention is applied, an electrolyte aqueous solution absorber 1 as shown in FIGS. 1 and 2 will be described. Here, the "electrolyte aqueous solution absorber" in the claims and the detailed description of the invention has a function of a sandbag used for preventing or repairing the embankment of a levee in the flooding of a sea or a river, or for repairing or preventing water leakage. Alternatively, a material having a function of removing water which may contain unnecessary electrolyte remaining in flooding or the like may be used. An aqueous electrolyte solution absorbent 1 according to the present invention comprises a water-permeable bag 2 and an aqueous electrolyte solution-absorbing polymer 3 contained in the water-permeable bag 2.
And a support 4. The electrolyte aqueous solution absorbent 1 is composed of a dried electrolyte aqueous solution absorbing polymer 3a, a support 4 and a water-permeable bag 2 in a dry state as shown in the sectional view of FIG. As shown in the cross-sectional view of FIG. FIG. 3 is a cross-sectional view in a dry state of the electrolyte aqueous solution absorber 1 according to the present invention in which soil and solid matter 5 having a specific gravity of 1 or more are contained.
FIG. 4 is a cross-sectional view of the liquid-absorbing swollen state.

The aqueous electrolyte solution-absorbing polymer used in the present invention is usually produced by introducing a hydrophilic group into a water-insoluble polymer. The electrolyte aqueous solution absorbing polymer used as a raw material is not particularly limited, but it is preferable to use a water-insoluble polymer obtained from an inexpensive general-purpose monomer as a raw material. Specific examples of such versatile water-insoluble polymers include the following polymers. For example, ABS (acrylonitrile-butadiene-styrene) polymer, high impact polystyrene (HIPS), styrene-butadiene elastomer (SBC), SAN (styrene-acrylonitrile)
Polymer, polyacrylonitrile polymer (PAN),
Polyacrylonitrile-butadiene (nitrile rubber),
Polystyrene (PS), nylon polymer, polyolefin (eg, polyethylene, polypropylene, polyisoprene, etc.) polymer, polyvinyl chloride (PVC),
Polyphenylene ether (PPE), polyphenylene sulfide (PPS), polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polysulfone, polyallylsulfone, polyethersulfone, polythioethersulfone, polyetherketone, polyether Imide, polyether ether ketone, polyamide (nylon), polyamide imide, polyimide, polyarylate, aromatic polyester, polyurethane, polyvinyl chloride, chlorinated polyether, polychloromethylstyrene, polyacrylate, polymethacrylate, celluloid,
Various liquid crystal polymers, methacrylic polymer (PMMA),
Amber polymer, terpene polymer, epoxy polymer,
Phenol-formalin polymer, melamine polymer and the like can be mentioned.

As the electrolyte aqueous solution absorbing polymer used as a raw material, among the above-mentioned polymers, those having an aromatic ring or a conjugated diene structure to which a hydrophilic polar group described later can be easily introduced are preferable. The content of the aromatic ring and / or conjugated diene unit in the water-insoluble polymer is desirably about 1 to 100 mol% based on all monomer units in the water-insoluble polymer. The content is preferably about 1 mol% or more in order to prevent the number of hydrophilic polar groups introduced into the water-insoluble polymer from being reduced and, as a result, the absorption effect on the aqueous electrolyte solution from being reduced.

The molecular weight of the water-insoluble polymer material (M
The weight average molecular weight (M) is not particularly limited as w).
In general, w) is about 1,000 to 20,000,000, and more preferably about 10,000 to 1,000,000. If the molecular weight is higher than 1,000, it will be completely dissolved in the aqueous electrolyte solution by the introduction of the hydrophilic polar group,
The inconvenience that the gel state cannot be maintained after absorption can be avoided. Molecular weight 20,000,0
When it is lower than 00, introduction of a hydrophilic polar group is facilitated, which is more practical.

These water-insoluble polymers may be freshly produced unused granular polymers (virgin pellets), or used water-insoluble polymers or waste materials molded for specific applications. There may be. Examples of the waste materials include waste materials (semi-finished products) in the production process of polymer raw materials and molded products, housings and various component materials already used in electric products and automobiles, or tubes, hoses, and various cushioning materials. And the like. The used water-insoluble polymer refers to a water-insoluble polymer recovered from the above waste materials and the like. The place where the waste material is discharged may be from a factory, a store, a household, or the like. However, a waste collected from a factory, a store, or the like (for example, odd ) Are more desirable because they often have relatively uniform compositions.

The water-insoluble polymer may be an alloy with another polymer, such as a face dye, a stabilizer,
It may be a waste material or a used water-insoluble polymer containing additives such as a flame retardant, a plasticizer, a filler, a curable adhesive, and other auxiliary agents. Alternatively, it may be a used water-insoluble polymer or a mixture of waste material and virgin material.

The present invention is intended to convert into a water-soluble electrolyte-absorbing polymer by introducing a hydrophilic polar group into the water-insoluble polymer described above. At this time, the hydrophilic polar group has an effect of increasing the absorbability to the aqueous electrolyte solution, while the hydrophobic portion (the main chain, the aromatic ring and the portion where the hydrophilic polar group is not introduced) in the water-insoluble polymer is This has the effect of preventing the polymer from being dissolved in various aqueous electrolyte solutions.

The hydrophilic polar group may be an acidic group or a basic group.
And a polar group such as a group. Acid or basic groups are salts
May be formed. As such a hydrophilic polar group
Is specifically the formula -SO₃M (where M is a hydrogen atom or
Is a cation such as a metal such as sodium or potassium
Represents ) Which may form a salt represented by
Group, formula -OSO₃M (where M is as defined above)
A sulfate group which may form a salt of the formula
M₁) (OM₂) Or the formula -OPO (OM₁) (OM
₂) (Where M₁And M₂Are the same or different
And the same as M above. )
Good phospho group, formula -OM₃(Where M₃Agrees with M
Righteousness. A) a hydroxyl group which may form a salt represented by the formula:
COOM₄(Where M ₄Is equivalent to M. ) Salt
Carboxyl group, etc. which may form
Examples of the acidic group that may be included. Also, for example
Amino group, secondary amino group (for example, methylamino group), 3
Quaternary amino group (for example, dimethylamino group) such as quaternary amino group
Ammonium group (for example, trimethylammonium chloride
Amine bases which may form salts such as
Examples thereof include a basic group which may form a salt. So
In addition, as the hydrophilic polar group, an amide group or a nitro group
And the like.

The above water-insoluble polymer has a sulfo group and / or
Alternatively, as a method for introducing a sulfo group forming a salt, preferably, the water-insoluble polymer having an aromatic ring and concentrated sulfuric acid (about 70% by weight or more are more preferable), sulfuric anhydride, A sulfo group is introduced by directly reacting with a sulfonating agent such as fuming sulfuric acid or chlorosulfonic acid, or by reacting the polymer with a sulfonating agent in a state of being dissolved or dispersed in an organic solvent. Neutralizing the substance with a basic substance (for example, sodium hydroxide or potassium hydroxide) makes it possible to convert the substance to a sulfonate. The reaction temperature at the time of sulfo group introduction greatly differs depending on whether or not an organic solvent is used.
To about 200 ° C., preferably about 30 to 120 ° C. When the temperature is about 0 ° C. or higher, the reaction rate becomes sufficiently high, and an electrolyte aqueous solution-absorbing polymer having better performance is obtained.When the temperature is about 200 ° C. or lower, the molecular chains in the polymer are hardly cut. Therefore, the above range is preferable because it is difficult to dissolve in water or a solvent. The reaction time varies greatly depending on the reaction temperature, but generally ranges from 1 minute to 40 minutes.
Time, preferably 5 minutes to 2 hours. This condition is preferable because the reaction proceeds more sufficiently and the production efficiency is good.

As a method for introducing a sulfate group which may form a salt, preferably, a sulfate group is first introduced by reacting a water-insoluble polymer having an unsaturated bond with a high-temperature aqueous sulfuric acid solution. By reacting with a basic compound (eg, sodium hydroxide or potassium hydroxide). As a method for introducing a carboxyl group which may form a salt, preferably, n-butyllithium is added to a water-insoluble polymer having an aromatic ring, and then the carboxyl group is first reacted with dry ice to form a carboxyl group. It becomes possible to introduce a group, and then a carboxylate can be obtained by reacting with a basic compound (for example, sodium hydroxide or potassium hydroxide).

Examples of the method for introducing an amide group include hydrolyzing the water-insoluble polymer having a nitrile group with heated concentrated sulfuric acid or a heated alkali (eg, an aqueous solution of sodium hydroxide or potassium hydroxide). Can be obtained by The method for introducing a nitro group is preferably achieved by reacting a water-insoluble polymer having an aromatic ring with fuming nitric acid or a mixture of nitric acid and sulfuric acid. -PO (OH) which may form a salt
As a method for introducing the ₂ group, preferably first -PO (OH) ₂ group is introduced by adding after hydrolysis of phosphorus trichloride to water-insoluble polymer having an aromatic ring, then, a basic compound (E.g., sodium hydroxide or potassium hydroxide) to form the same salt. -OPO (OH) _{2 which} may form a salt
As a method for introducing a group, preferably, -OPO (OH) ₂ group is first introduced by adding phosphorus trioxide to a water-insoluble polymer having an unsaturated bond, followed by hydrolysis, and thereafter, a basic compound ( (E.g., sodium hydroxide or potassium hydroxide) to form the same salt.

As a method of introducing a hydroxyl group which may form a salt, preferably, a hydroxyl group can be first introduced by reacting a water-insoluble polymer having an unsaturated bond with an aqueous sulfuric acid solution, and thereafter, a base is introduced. By reacting with an acidic compound (for example, sodium hydroxide or potassium hydroxide), the same salt can be obtained. Level 3 and
As a method for introducing a quaternary amine base, preferably, a water-insoluble polymer having an aromatic ring is subjected to chloromethylation by a Friedel-Crafts reaction and then reacted with ammonia or various amine compounds. By 3
Grade and quaternary amine salts can be introduced as ionic groups. Introduction of a primary amino group or a secondary amino group, and conversion of these amino groups into salts may be carried out according to a method known per se.

The hydrophilic polar group-introducing agent or basic compound may be a virgin agent, a waste liquid discharged from a factory, or a recycled product. From the viewpoint of effective use of resources, it is more preferable to use the waste liquid for producing the electrolyte aqueous solution absorbing polymer used in the present invention. In addition, only one type of these hydrophilic polar groups may be introduced into the water-insoluble polymer, or two or more types may be introduced. The amount of these hydrophilic polar groups introduced into the water-insoluble polymer is preferably about 0.1 to 99 mol% based on all monomer units in the polymer. Suppress that the polymer after the introduction of the hydrophilic polar group is dissolved in water,
The above range is preferable in order to have good absorbability for the aqueous electrolyte solution.

The electrolyte aqueous solution-absorbing polymer obtained by the above-described method may be further subjected to a treatment known per se. According to a preferred embodiment, the reaction product, which is usually a gel, obtained by the above-described hydrophilic polar group introduction reaction is preferably filtered, washed with water, and then dried or dehydrated to obtain an excellent variety of electrolytes. A polymer having the ability to absorb aqueous solution is obtained. Further, it goes without saying that the electrolyte aqueous solution-absorbing polymer of the present invention may be produced by polymerizing a monomer having the above-mentioned hydrophilic polar group introduced into the main chain and / or the side chain according to a means known per se.

Further, the aqueous electrolyte solution absorbing polymer used in the present invention may optionally contain other components, for example, a conventionally known aqueous electrolyte solution absorbing polymer (for example, polymerized by adding a crosslinkable monomer), a stabilizer, a moisture absorbing agent, and a curing agent. It may be further compounded with a mold adhesive or the like.

Regardless of the method, a polymer capable of absorbing various electrolyte aqueous solutions at a high concentration can be obtained by introducing a hydrophilic polar group into a water-insoluble polymer, preferably according to the method described above. Becomes As the aqueous electrolyte solution that can be absorbed by the obtained aqueous electrolyte solution absorbing polymer, various inorganic salts and organic salt compounds, and,
Examples include inorganic acids and inorganic bases, organic acids and organic bases. More specifically, seawater, sewage, muddy water, etc. are mentioned. The electrolyte aqueous solution absorber according to the present invention has more effective absorption ability especially for an electrolyte aqueous solution containing sodium salts, calcium salts, magnesium salts, and the like contained in soil or seawater. There is no particular problem with these electrolyte aqueous solutions whether they are in a gas, liquid or solid state when absorbed by the electrolyte aqueous solution absorber according to the present invention. In the case of a liquid, the aqueous electrolyte solution can be absorbed by adding the aqueous electrolyte solution absorbing polymer as it is to the aqueous electrolyte solution. In the case of a gas, it can be absorbed in a liquefied state or by bringing the polymer into contact with a gaseous aqueous electrolyte solution. In the case of a solid, it can be absorbed by the absorber in a state of being dissolved in another electrolyte aqueous solution. However, it is more preferable that the aqueous electrolyte solution is in a liquid state.

As the material of the water-permeable bag 2 of the present invention, a cloth of natural fibers or synthetic fibers is used. Examples of the natural fiber include cotton, hemp, and silk.
Examples of the synthetic fiber include polyamide, polyimide, polyester, polyethylene, and polypropylene. It is preferable that these fibers are singly or mixed and knitted or woven into a cloth. However, in some cases, it may be a nonwoven fabric. Further, depending on the case, it may be one in which pores penetrating the front and back of the film-like body are formed.

The shape or material of the support 4 of the present invention is not particularly limited as long as it can support the above-mentioned electrolyte aqueous solution absorbing polymer. Here, the term “support” means that the modified polymer compound is attached or impregnated to prevent the modified polymer compound from being extremely inclined in the water-permeable bag 2. As the support, specifically, a flexible network is preferable. As the flexible net 4, a cloth of natural fibers or synthetic fibers is used. As the material, the same material as the material of the water-permeable bag 2 can be used. That is, examples of the natural fiber include cotton, hemp, and silk. Examples of the synthetic fiber include polyamide, polyimide, polyester, polyethylene, and polypropylene. It is preferable that these fibers are singly or mixed and knitted or woven into a cloth. However, in some cases, nonwoven fabric or paper may be used. Further, depending on the case, it may be one in which pores penetrating the front and back of the film-like body are formed.

In this case, it is preferable that the occupation ratio of the through holes in the support 4, preferably the flexible net, is higher than that of the water-permeable bag 2, whereby the electrolyte By attaching or impregnating the support with the aqueous solution absorbing polymer, the electrolyte aqueous solution absorbing polymer can be fixed to the support. Thereby, when transporting and storing the electrolyte aqueous solution absorbent according to the present invention, it is possible to prevent the electrolyte aqueous solution absorbent polymer from being out of shape inside the electrolyte aqueous solution absorber. Further, even when the electrolyte aqueous solution absorbent is used by absorbing the liquid and dried and reused after use, it is possible to prevent the electrolyte aqueous solution absorbent polymer from being out of shape such as being biased inside the electrolyte aqueous solution absorber. In addition, there is an advantage that the number of times of repeated use can be increased.

As a method of fixing the support of the present invention by adhering or impregnating the electrolyte aqueous solution-absorbing polymer, the support is coated with an aqueous dispersion of the electrolyte aqueous solution-absorbing polymer in a swollen state and dried. Can be mentioned. In addition, as the method, a method in which a dispersion system of the electrolyte aqueous solution absorbing polymer in a non-swelling state in an organic liquid is applied to the support and dried. As a result, the operation of coating and drying can be simplified and the energy used can be reduced, so that it is suitably used in the present invention. Further, as the method, a method in which water or an organic liquid is contained in the support, and the electrolyte aqueous solution-absorbing polymer in a dry state is adhered to the support and dried. The sheet-like body fixed by adhering or impregnating the electrolyte aqueous solution-absorbing polymer to the support by the method as described above can be obtained by performing a compression operation using a static pressure press or a roller. In this case, the heating can be performed at room temperature, but it is more effective to perform the heating at room temperature or higher.

In the present invention, soil and / or a solid substance having a specific gravity of 1 or more can be contained in the water-permeable bag in addition to the electrolyte aqueous solution absorbing polymer. By doing so, there is an advantage that the electrolyte aqueous solution absorber according to the present invention is less likely to be washed away by water or the like, particularly in the initial stage of installation. Examples of the solid having a specific gravity of 1 or more include those formed of natural minerals, those formed of waste, and those formed by binding waste. These materials include plastics, metals, ceramics or glass, and mixtures thereof. For such binding, a polymer material having a specific gravity of 1 or less can be used. The polymer material used for bonding is not particularly limited, but, for example, polystyrene, styrene-propylene copolymer,
Styrene-butadiene copolymer, styrene-vinyl chloride copolymer, styrene-vinyl acetate copolymer, styrene-
Acrylic ester copolymer, styrene-methacrylic ester copolymer, polyester resin, polyvinyl alcohol, water-soluble resin such as casein or sodium polyacrylate, alcohol-soluble resin such as copolymerized nylon or methoxymethylated nylon, polyurethane,
Curable resins that form a three-dimensional network structure, such as melamine resin or epoxy resin, and the like can be given.

In the present invention, a magnetic substance having a specific gravity of 1 or more may be used. Due to this magnetism, there is an advantage that the electrolyte aqueous solution absorber according to the present invention can be magnetically attracted to enable mobile transportation with a crane or the like. There is also an advantage that the magnetism makes it possible to identify the electrolyte aqueous solution absorber. Those having magnetism include those having ferrimagnetism, ferromagnetism, or parasitic magnetism. More specifically, as the ferromagnetic material, iron, nickel, cobalt or an alloy thereof, or an alloy containing these, further, a transition metal or an alloy thereof, further,
An alloy containing a rare earth element can be given. Further, examples of the ferrimagnetic material include magnetite, maghemite, hematite, manganese zinc ferrite, manganese nickel ferrite, barium ferrite, and strontium ferrite. These may be those made of natural minerals, those made of waste, and those formed by binding waste. These can increase the weight of the sandbag greatly, as compared with the general inorganic material of specific gravity,
Even a sandbag in a liquid absorbing state has an effect of relatively increasing the weight. In addition, since these materials can be obtained from inductor elements of used electric devices, deflection yokes of speakers and televisions, and are difficult to process in disassembly processing of electronic devices, they are also useful from the viewpoint of effective utilization. is there.

[0032]

The aqueous electrolyte solution absorbent according to the present invention comprises:
It has the advantage that it has a wider range of application than conventional electrolyte aqueous solution absorbers, that is, there are more types of electrolyte solution that can be absorbed. The electrolyte aqueous solution absorber according to the present invention has a small weight and volume during transportation, absorbs water during use, and sufficiently satisfies the weight, volume and external shape follow-up functions. Also, it is hard to lose its shape during transportation and storage. Because of these features, the aqueous electrolyte solution absorber according to the present invention can be used as an excellent sandbag substitute. That is, the absorber can be applied not only to pure water but also to water containing electrolytes such as seawater, sewage, and muddy water. It can also be applied to water leakage, particularly from tanks that store aqueous electrolyte solutions in factories in the battery or plating industries, and can be applied to conventional sandbags (eg, hemp bags filled with soil).
It has excellent liquid absorption and handling properties as compared with.

The electrolyte aqueous solution absorber according to the present invention can be produced by using a used polymer or waste material, and a solid material having a specific gravity of 1 or more which is hardly treated in the disassembly process of an electronic device if desired. Therefore, there is an advantage that these waste materials and the like can be effectively reused and contribute to the global environment, and there is an advantage that an inexpensive product can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electrolyte aqueous solution absorber according to the present invention when it is dried.

FIG. 2 is a cross-sectional view of the electrolyte aqueous solution absorber according to the present invention at the time of liquid absorption swelling.

FIG. 3 is a cross-sectional view of the electrolyte aqueous solution absorber according to the present invention containing soil and / or solid matter having a specific gravity of 1 or more when it is dried.

FIG. 4 is a cross-sectional view of the electrolyte aqueous solution absorber according to the present invention containing soil and / or a solid substance having a specific gravity of 1 or more at the time of liquid absorption swelling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolyte aqueous solution absorber 2 Water-permeable bag-like body 3 Electrolyte aqueous solution absorption polymer 4 Support 5 Soil or solid matter of specific gravity 1 or more

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2D018 AA06 4F072 AB03 AB04 AB05 AB06 AB07 AB29 AB30 AB31 AD02 AD05 AD06 AD08 AD09 AD13 AD21 AD23 AD37 AD42 AD43 AD44 AD45 AD46 AD53 AG04 AG06 AG07 AJ24 AK05 AK06 AL17

Claims (16)

[Claims] 1. An aqueous electrolyte solution absorbent comprising an aqueous electrolyte solution-absorbing polymer comprising a water-insoluble polymer into which a hydrophilic polar group is introduced, and a support. 2. The electrolyte aqueous solution absorber according to claim 1, wherein the support is a flexible network. 3. The aqueous electrolyte solution absorber according to claim 1, wherein the aqueous electrolyte solution absorbing polymer is supported by a support. 4. The hydrophilic polar group may be a sulfo group which may form a salt, a sulfate group which may form a salt, a carboxyl group which may form a salt, an amide group, a nitro group,
A salt-forming -PO (OH) ₂ group, a salt-forming -OPO (OH) ₂ group, a salt-forming hydroxyl group, and a salt-forming 2. The method of claim 1, wherein the at least one kind of amine base is at least one kind.
The electrolyte aqueous solution absorber according to the above. 5. The electrolyte aqueous solution absorbent according to claim 1, wherein the hydrophilic polar group accounts for 0.1 to 99 mol% based on all monomer units in the water-insoluble polymer. 6. The electrolyte aqueous solution absorber according to claim 1, wherein the water-insoluble polymer has at least one kind of an aromatic ring and a conjugated diene in a main chain and / or a side chain. 7. The method according to claim 1, wherein at least one of the aromatic ring and the conjugated diene contained in the water-insoluble polymer accounts for 1 to 100 mol% based on all monomer units in the polymer. 7. The electrolyte aqueous solution absorber according to 6. 8. An aqueous electrolyte solution absorber comprising an aqueous electrolyte solution absorbing polymer comprising a used water-insoluble polymer into which a hydrophilic polar group has been introduced, and a support. 9. An electrolyte aqueous solution absorber characterized in that a water-permeable bag-like body is filled with an aqueous electrolyte solution-absorbing polymer obtainable by introducing a hydrophilic group into a water-insoluble polymer. Production method. 10. The method for producing an electrolyte aqueous solution absorber according to claim 9, wherein the support is a flexible network. 11. The method according to claim 9, wherein the electrolyte aqueous solution absorbing polymer is supported by a support. 12. The hydrophilic polar group may be a sulfo group which may form a salt, a sulfate group which may form a salt, a carboxyl group which may form a salt, an amide group, a nitro group, A salt-forming -PO (OH) ₂ group, a salt-forming -OPO (OH) ₂ group, a salt-forming hydroxyl group, and a salt-forming The method for producing an electrolyte aqueous solution absorber according to claim 9, wherein at least one kind of a good amine base is used. 13. The method for producing an aqueous electrolyte solution absorbent according to claim 9, wherein the hydrophilic polar group accounts for 0.1 to 99 mol% based on all monomer units in the water-insoluble polymer. 14. The method for producing an electrolyte aqueous solution absorber according to claim 9, wherein the water-insoluble polymer has at least one kind of an aromatic ring and a conjugated diene in a main chain and / or a side chain. . 15. The method according to claim 1, wherein at least one of the aromatic ring and the conjugated diene contained in the water-insoluble polymer accounts for 1 to 100 mol% based on all monomer units in the polymer. 15. The method for producing an electrolyte aqueous solution absorber according to 14. 16. An electrolyte aqueous solution, characterized by filling a water-permeable bag with an electrolyte aqueous solution-absorbing polymer obtainable by introducing a hydrophilic group into a used water-insoluble polymer. Manufacturing method of absorber.