JPH11315271A - Water leak preventive material and method for preventing water leak - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water leak preventive material which is low in cost, can be applied without requiring much time and labor, and is adaptable to bonding the surfaces of concrete or to wide cracks. SOLUTION: This water leak preventive material is prepd. by coating or impregnating fabrics, ropes, films, or sheets with a permeating waterproofing agent contg. (A) a surfactant, (B) a gelable hydrophilic resin, (C) a gelling agent for ingredient B, and (D) water. Pref., the waterproofing agent is prepd. by mixing 100 pts.wt. water (ingredient D) with 0.1-30 pts.wt. ingredient A, 0.1-20 pts.wt. ingredient B, and 0.1-30 pts.wt. ingredient C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage prevention material and a water leakage prevention method having a good water stopping performance, and more particularly to a water leakage prevention material which enters a crack or a hole causing water leakage and fills the gap. The present invention relates to a method for preventing water leakage by installing, in a water leakage infiltration path, a water leakage prevention material obtained by applying or impregnating a cloth, a rope, a film, or a sheet with a permeable waterproofing agent capable of preventing penetration.

[0002]

2. Description of the Related Art To stop water leakage from a roof, a floor or a wall, a sealing agent is applied and filled into a leaking point such as a hole or a crack or a gap which causes the leaking. The entire roof must be replaced, the waterproof sheet must be completely replaced, the walls must be spray-painted, and the tiles must be completely replaced. In many cases, it is extremely difficult to identify the infiltration point of the leaked water, so that simple repair simply by applying and filling a sealant is often not solved. In the case of rain leakage, the compensation period is often as long as 5 to 10 years, during which time the contractor, the contractor whose compensation has expired, and sometimes the owner, have to bear a large amount of expenses. Have been. In this regard, Tokuhei 7-966
No. 72 discloses a rain leak preventive for spraying, and discloses a method of closing a crack which causes water leakage with a water-insoluble powdery material. However, when the cracks are 1 mm or more, the water-insoluble powdery material tends to flow out, and there is a disadvantage that clogging becomes insufficient.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides an inexpensive, large-scale crack for a building or leakage from a joint.
The aim is to develop a water leakage prevention method and a water leakage prevention material that does not require construction work.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.
That is, the present invention relates to (1) (a) a surfactant, (b) a gelling hydrophilic resin, (c) a gelling agent of the component (b), and (d) a water-permeable permeable waterproofing agent containing cloth. A water leakage preventing material characterized by being applied or impregnated on a rope, film or sheet, (2) 100 to 100 parts by weight of water of (d), 0.1 to 30 parts by weight of a surfactant (a), b) Use a permeable waterproofing agent in which the components are mixed at a ratio of 0.1 to 20 parts by weight of the gelling hydrophilic resin and 0.1 to 30 parts by weight of the gelling agent of the component (c) (b). Water leakage prevention material according to the above (1),
(3) The gelling hydrophilic resin is poly (meth) acrylic acid derivative, alginic acid derivative, starch derivative, poly-N-
The water leakage prevention material according to the above (1) or (2), which is at least one selected from a vinylacetamide derivative, a polyvinyl alcohol derivative, and a cellulose derivative;
(4) The gelling hydrophilic resin is sodium poly (meth) acrylate, poly (meth) acrylamide, alginic acid, sodium alginate, potassium alginate, propylene glycol alginate, starch, sodium starch glycolate, starch phosphoric acid (5) a water-leak prevention material according to the above (3), which is at least one selected from sodium ester, poly-N-vinylacetamide, polyvinyl alcohol, methylcellulose, hydroxypropylcellulose and sodium carboxymethylcellulose; The resin gelling agent is selected from polyvalent metal silicates, water-soluble alkaline earth metal salts, alum, water-soluble aluminum salts, water-soluble iron salts, water-soluble manganese salts, water-soluble zinc salts, and alkaline earth metal oxides. At least one (1) The leak prevention material according to any one of (1) to (4), and (6) the leak prevention material according to any one of (1) to (5) is installed in the leak infiltration path. And a method for preventing water leakage.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The surfactant (component (a)) has a function of facilitating wetting when the permeable waterproofing agent used in the present invention is applied or impregnated to a cloth, a rope, a film or a sheet, and also facilitates the impregnation. Surfactants may be of any type, anionic, cationic, nonionic, amphoteric, etc., specifically, fatty acid salts, phosphates, polyoxyethylene glycol, tetraalkyl ammonium salts, Examples thereof include an alkyl ether sulfate, an alpha olefin sulfonate, and a fatty acid alkanolamide, and these may be used alone or in combination of two or more. Among these surfactants, it is preferable to select those having good biodegradability from an environmental point of view. Specifically, fatty acid sodium, fatty acid potassium, sodium alkyl ether sulfate, sodium alpha olefin sulfonate, fatty acid alkanolamide And alkylamine oxides. The amount of the surfactant is usually 0.1 to 100 parts by weight of water (component (d)).
It is 30 parts by weight, preferably 0.3 to 10 parts by weight.

A part of the gelling hydrophilic resin (component (b)) reacts with the gelling agent (component (c)) of the gelling hydrophilic resin to form a water-insoluble gel, and the unreacted remainder is It acts as a gel binder and prevents water from spilling when a permeable waterproofing agent is applied or impregnated on a cloth, rope, film or sheet. A superabsorbent polymer that swells up to about 100 times is preferred, and a non-crosslinked polymer is particularly preferred. Specific examples of the gelling hydrophilic resin that can be used include alkali metal poly (meth) acrylate, sodium (meth) acrylate-vinyl alcohol copolymer (methyl (meth) acrylate-vinyl acetate copolymer) Saponified product), poly (meth) acrylonitrile polymer saponified product, hydroxyethyl methacrylate polymer, poly (meth) acrylic acid derivative such as poly (meth) acrylamide, alginic acid,
Alginate derivatives such as sodium alginate, potassium alginate, propylene glycol alginate, starch derivatives such as starch, sodium starch glycolate, potassium starch glycolate, sodium starch phosphate, potassium starch phosphate, methylcellulose, hydroxypropylcellulose, carboxy Examples include cellulose derivatives such as sodium methylcellulose and potassium carboxymethylcellulose, poly-N-vinylacetamide derivatives such as poly-N-vinylacetamide, and polyvinyl alcohol derivatives such as polyvinyl alcohol. Preferred are sodium poly (meth) acrylate and poly (meth) acrylate.
Acrylic amide, alginic acid, sodium alginate, potassium alginate, propylene glycol alginate, starch, sodium starch glycolate, sodium starch phosphate, poly-N-
Examples include vinylacetamide, polyvinyl alcohol, methylcellulose, hydroxypropylcellulose or sodium carboxymethylcellulose. These gelling hydrophilic resins may be used alone or as a mixture. The compounding amount of the gelling hydrophilic resin is water ((d) component) 1
It is usually 0.1 to 20 parts by weight, preferably 0.2 to 10 parts by weight, based on 00 parts by weight.

Further, another hydrophilic paste may be mixed with the gelling hydrophilic resin. The hydrophilic sizing agent may be any of a natural sizing agent, a synthetic polymer sizing agent, and the like, but is preferably a synthetic polymer sizing agent that does not easily rot. Specifically, gelatin,
Glue, acrylic emulsion and the like. When a hydrophilic paste is used, the amount of the hydrophilic paste is water ((d) component).
It is usually 1 to 10 parts by weight based on 100 parts by weight. The hydrophilic paste functions to prevent the osmotic waterproofing agent from being washed away when applied or impregnated on a cloth, rope, film or sheet.

The gelling agent (component (c)) of the gelling hydrophilic resin is a compound which chemically or physically bonds with the gelling hydrophilic resin in water to gel the hydrophilic resin. There is no particular limitation as long as it is present, but a compound which usually produces a divalent or higher valent metal cation in water is preferred. Whether or not the gelling agent can be used can be easily determined by dissolving the gelling hydrophilic resin in water, adding the compound, and increasing the viscosity of the solution. Specific examples include polyvalent metal silicates that generate metal ions in water to the extent that they have gelling ability, water-soluble alkaline earth metal salts, alum, water-soluble aluminum salts, water-soluble iron salts, water-soluble manganese salts, Water-soluble zinc salts or alkaline earth metal oxides are exemplified. Examples of the polyvalent metal salt of silicic acid include aluminum salt of silicic acid, calcium salt of silicic acid, and Ca-type silicate such as bentonite, montmorillonite and smectite.
In the present invention, the Ca type such as bentonite, montmorillonite or smectite means those having a relatively large calcium content, and when the calcium content in these silicates is converted to CaO, bentonite, montmorillonite or smectite or the like is used. About 1 to 2% or more by weight based on the total weight is preferable. Water-soluble alkaline earth metal salts include those having 1 to 3 carbon atoms.
And alkaline earth metal salts of organic acids or inorganic acids of the inorganic acid. Specific examples thereof include calcium acetate, calcium chloride, calcium nitrate, magnesium acetate, magnesium chloride, magnesium nitrate, and magnesium sulfate. No. Examples of alum include aluminum potassium alum, iron alum, and the like. Examples of the water-soluble aluminum salt include aluminum acetate, aluminum chloride, aluminum sulfate, and aluminum nitrate. Iron salts of organic acids or iron salts of inorganic acids and the like, specifically, iron acetate, iron chloride,
Iron sulfate, iron nitrate, etc., as water-soluble manganese salts,
Examples thereof include manganese salts of organic acids and inorganic acids having 1 to 3 carbon atoms, and specific examples thereof include manganese acetate, manganese chloride, and manganese sulfate. Examples of the water-soluble zinc salt include zinc salts of organic acids having 1 to 3 carbon atoms or zinc salts of inorganic acids, and specific examples thereof include zinc acetate, zinc chloride, zinc nitrate, and zinc sulfate. Examples of the alkaline earth metal oxides include magnesium oxide, calcium oxide, and the like, and Ca-type bentonite, Ca-type montmorillonite and Ca-type smectite, magnesium acetate, calcium hydroxide, calcium acetate, aluminum acetate, and aluminum sulfate are preferable. Above all, Ca-type bentonite, Ca-type montmorillonite, Ca-type smectite and the like have a swelling property and are therefore particularly preferable in practical use. The function of the gelling agent for the hydrophilic resin is to make the gelling hydrophilic resin an insoluble gel in water, but the resulting gel has poor fluidity. Therefore, when the water leakage preventing agent is applied or impregnated to a cloth, a rope, a film or a sheet, it has a function of preventing the water leakage. Further, since the formed gel becomes insoluble in water, the gel, the rope, the film or the sheet, which has closed the leak entry point, does not dissolve again in water and flow away. The amount of the gelling agent for the hydrophilic resin is 100 parts of water (component (d)).
Usually 0.1 to 30 parts by weight with respect to parts by weight,
Although the gelling ability differs depending on the individual substance, it is preferable to use an amount of the gelling hydrophilic resin or less except for the polyvalent metal silicate mineral.

In the permeable waterproofing agent used in the present invention, if necessary, a water-insoluble powdery substance, fibrous substance or scale-like substance may be mixed. The water-insoluble powder, fibrous or flaky material may be any of organic powder, inorganic powder, organic fiber and inorganic fiber. In the case of powder, the particle size is wide and uniform to 0.1 micron to 1 mm. Are preferably distributed. In the case of a fibrous material, the fiber length is 1 micron to 2 mm.
It is about. In the case of a scale, the diameter is preferably about 0.5 mm to 3 mm. Specific examples include rosin powder, resin particles, clay, wood flour, pulp fiber, fibrous zinc oxide, vermiculite, pearlite, mica and the like. These can be used alone or in combination of two or more. When using two or more kinds in combination, a combination that broadens the particle size distribution is preferable. In the present invention, a water-insoluble powdery substance, fibrous substance, or scale-like substance is hardly settled due to having a gel of a gelling hydrophilic resin, and storage stability is good.
The amount of water-insoluble powder, fibrous or scaly compound is
It is usually 2 to 10 parts by weight based on 100 parts by weight of water (component (d)).

The permeable waterproofing agent used in the present invention can be obtained by uniformly mixing the above components at a predetermined ratio. In this case, the order of mixing the components is arbitrary. The permeable waterproofing agent may be applied or impregnated on a cloth, a rope, a film or a sheet by any method, and may be applied in advance using an applicator and then dried, or may be applied to concrete using a cloth, a rope, After installing the film or sheet, the permeable waterproofing agent may be applied or impregnated. The type of cloth, rope, film or sheet to which the permeable waterproofing agent is applied or impregnated may be any type, and is not particularly limited as long as it can hold or impregnate the permeable waterproofing agent. It is preferred that the material be wetted more quickly. Further, the material of the film or sheet itself is preferably water-resistant, and polyester, polypropylene,
Polyethylene, vinyl chloride, polyurethane, rubber sheets and the like are mentioned as specific examples that can be used. Similarly, in the case of cloth and rope, those in which the permeable waterproof agent is easily wetted are preferable because they can be easily impregnated. Specific examples include cotton cloth, polyester non-woven fabric,
Hemp rope, cotton rope, polyester rope, rayon non-woven fabric, and the like. As a method of using the thus obtained water leakage prevention material of the present invention, a water leakage prevention material may be installed in the vicinity of the water leakage entrance when it is found. If the location of the leak is unknown, it is sufficient to install a leak prevention material on the roof, floor or wall where the leak occurs. In that case, there is no need to install it entirely on the roof, floor or wall.

A preferred roof for applying the water leakage prevention material of the present invention is a reinforced concrete flat roof, which is usually a combination of a concrete waterproof joint and a waterproof membrane such as asphalt waterproof, sheet waterproof, and coating waterproof. It is good to install a water leakage prevention material in contact with the waterproof joint.
The floor to which the water leakage preventive of the present invention is preferably applied is a bare concrete body, but it is preferable to install the water leakage preventive in contact with a crack or a joint waterproof joint. A preferable wall body to which the water leakage prevention material of the present invention is applied is a concrete base material, and is preferably installed at a joint between concretes.

[0012]

Next, the present invention will be described in more detail by way of examples.

Example 1 (1) Surfactant: 10 g of sodium stearate
(Reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (2) Gelling hydrophilic resin: 7 g of sodium polyacrylate (trade name: Panakayak F, manufactured by Nippon Kayaku Co., Ltd.) (3) Gelling hydrophilic resin Gelling agent: 30 g of montmorillonite (trade name: Knipia-F, manufactured by Kunimine Industries Co., Ltd.) (4) 1000 g of water These were sufficiently mixed to obtain a viscous permeable waterproofing agent.

Separately, a commercially available cement containing sand (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, 800 g of water was added thereto, and the mixture was kneaded well. Then, the mixture was placed in a mold and solidified into a shape shown in FIG. The concrete container was divided into two parts, the bottom of the crack was further cut out (FIG. 2), and the pieces were joined together and reinforced with a wire. As shown in FIG. 3, the gap between the joint bottoms was 0.5 to 3 mm.
Met. After the container was again broken, 0.66 g (225 m ² ) of non-woven fabric (trade name: Bencott, manufactured by Asahi Kasei Corporation) was sandwiched between the joints of the container, and the ^two were combined and reinforced with wire. When water was poured into the container, water immediately flowed out from the joint of the container. After the container is broken again, a non-woven fabric (trade name: Bencott, manufactured by Asahi Kasei Corporation) is placed inside the seam of the container.
0.66 g (225 m ² ) of the above permeable waterproofing agent 4 g
Was impregnated and returned to the state shown in FIG. After 1 hour, the water was poured until it was full, but it did not leak. 3
After standing for 0 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

Example 2 (1) Surfactant: 5 g of sodium stearate (reagent, manufactured by Wako Pure Chemical Industries, Ltd.): 5 g of sodium lauryl sulfate (trade name: Emal 1)
(0 powder, manufactured by Kao Corporation) (2) Gelling hydrophilic resin: sodium alginate 2
0 g (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (3) Gelling agent for gelling hydrophilic resin: smectite
50 g (trade name: Smecton, manufactured by Kunimine Industries Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous permeable waterproofing agent.

Separately, a commercially available cement containing sand (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, 800 g of water was added thereto, and the mixture was kneaded well. Then, the mixture was placed in a mold and solidified into a shape shown in FIG. The concrete container was divided into two parts, the bottom of the crack was further cut out (FIG. 2), and the two were joined together and reinforced with a wire. As shown in FIG. 3, the gap between the joint bottoms was 0.5 to 2 mm.
Met. After the container was again broken, 0.66 g (225 m ² ) of non-woven fabric (trade name: Bencott, manufactured by Asahi Kasei Corporation) was sandwiched between the joints of the container, and the ^two were combined and reinforced with wire. When water was poured into the container, water immediately flowed out from the joint of the container. After the container is broken again, a non-woven fabric (trade name: Bencott, manufactured by Asahi Kasei Corporation) is placed inside the seam of the container.
0.66 g (225 m ² ) of the above permeable waterproofing agent 4 g
Was impregnated and returned to the state shown in FIG. After 1 hour, the water was poured until it was full, but it did not leak. 3
After standing for 0 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

Example 3 (1) Surfactant: 20 g of sodium lauryl sulfate
(Product name: Emal 10 powder, manufactured by Kao Corporation) (2) Gelling hydrophilic resin: 10 g of sodium carboxymethylcellulose (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (3) Gelation of gelling hydrophilic resin Agent: 5 g of calcium acetate (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous permeable waterproofing agent.

Separately, a commercially available sand-containing cement (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, 800 g of water was added thereto, and the mixture was kneaded well. Then, the mixture was placed in a mold and solidified into a shape shown in FIG. The concrete container was divided into two parts, the bottom of the crack was further cut out (FIG. 2), and the pieces were joined together and reinforced with a wire. As shown in FIG. 3, the gap between the joint bottoms was 0.5 to 3 mm.
Met. After the container was again broken, 0.66 g (225 m ² ) of nonwoven fabric (trade name: Bencott, manufactured by Asahi Kasei Corporation) was attached to the inside of the joint of the container, and the container was returned to the state shown in FIG. When water was poured, water immediately flowed out of the joint of the container. The above permeable waterproofing agent 2
0 g was applied with a brush to the seam inside the container. After 1 hour, the water was poured until it was full, but it did not leak. After standing for 30 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

Example 4 (1) Surfactant: 20 g of sodium oleate (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (2) Gelling hydrophilic resin: 10 g of sodium carboxymethyl cellulose (reagent, stock of Wako Pure Chemical Industries, Ltd.) (3) Gelling agent for gelling hydrophilic resin: bentonite
50 g (manufactured by Kunimine Industries Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous permeable waterproofing agent.

Separately, a commercially available sand-containing cement (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, 800 g of water was added thereto, and the mixture was kneaded well. Then, the mixture was placed in a mold and solidified into a shape shown in FIG. The concrete container was divided into two parts, the bottom of the crack was further cut out (FIG. 2), and the pieces were joined together and reinforced with a wire. As shown in FIG. 3, the gap between the joint bottoms was 0.5 to 3 mm.
Met. After the container was broken again, one cotton cord having a diameter of 3 mm was put on the inner center line of the joint of the container, and the container was returned to the state shown in FIG. When water was poured, water immediately flowed out of the joint of the container. Next, 10 g of the permeable waterproofing agent was dropped into the gap between the seams from the inside of the container.
After 1 hour, the water was poured until it was full, but it did not leak. After leaving for 30 minutes, drain the water from the container,
Dry at 0 ° C. for 3 days. After cooling the container to room temperature,
Water was poured again until it was full, but no water leaked from the seams. In addition, 3
After leaving for days, no water leaked from the joint.

Example 5 (1) Surfactant: 10 g of sodium stearate
(Reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (2) Gelling hydrophilic resin: 7 g of sodium polyacrylate (trade name: Panakayak F, manufactured by Nippon Kayaku Co., Ltd.) (3) Gelling hydrophilic resin Gelling agent: smectite
20 g (trade name: synthetic smectite, manufactured by Corp Chemical Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous permeable waterproofing agent.

Separately, a commercially available cement containing sand (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, 800 g of water was added thereto, and the mixture was kneaded well. Then, the mixture was placed in a mold and solidified into a shape shown in FIG. The concrete container was divided into two parts, the bottom of the crack was further cut out (FIG. 2), and the pieces were joined together and reinforced with a wire. As shown in FIG. 3, the gap between the joint bottoms was 0.5 to 3 mm.
Met. The above permeable waterproofing agent is 40cm long and 3c wide.
m, a polyester film having a thickness of 16 microns (trade name: Toyobo ester film, manufactured by Toyobo Co., Ltd.) is applied on one side of the easily adhering surface at a thickness of about 0.5 mm, and is not dried on the seam inside the concrete container. pasted. 3 containers
After standing at room temperature for a day, the mixture was allowed to dry, and then poured into water, but did not leak. After standing for 30 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

[0023]

The water leakage prevention material of the present invention is applied to a mortar or concrete product, so that the joints and cracks generated by the water leakage prevention material are quickly filled with the permeable waterproofing agent in the water leakage prevention material. Water can be prevented from entering the interior. Therefore, it is extremely useful for preventing deterioration of mortar and concrete products.

[Brief description of the drawings]

Fig. 1 Concrete container

FIG. 2 is a concrete container of FIG. 1 divided into two parts.

FIG. 3 is a view obtained by restoring the two-part container obtained in FIG. 2;

[Explanation of symbols]

 1; concrete container 2; seam 3; wire

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04G 23/02 E04G 23/02 B

Claims (6)

[Claims] 1. A permeable waterproofing agent containing (a) a surfactant, (b) a gelling hydrophilic resin, (c) a gelling agent of the component (b) and (d) water, using a cloth, a rope, A water leakage prevention material, which is applied or impregnated on a film or sheet. 2. With respect to 100 parts by weight of water of (d), (a)
0.1 to 30 parts by weight of a surfactant, (b) 0.1 to 20 parts by weight of a gelling hydrophilic resin, and (c) a gelling agent of (b) 0.1.
The water leakage prevention material according to claim 1, wherein a permeable waterproofing agent in which each component is mixed at a ratio of 1 to 30 parts by weight is used. 3. The gelling hydrophilic resin is at least one selected from poly (meth) acrylic acid derivatives, alginic acid derivatives, starch derivatives, poly-N-vinylacetamide derivatives, polyvinyl alcohol derivatives and cellulose derivatives. Item 3. The water leakage prevention material according to Item 1 or 2. 4. The gelling hydrophilic resin is sodium poly (meth) acrylate, poly (meth) acrylamide, alginic acid, sodium alginate, potassium alginate, propylene glycol alginate, starch, sodium starch glycolate, starch. Sodium phosphate ester, poly-N-vinylacetamide,
The water leakage prevention material according to claim 3, which is at least one selected from polyvinyl alcohol, methyl cellulose, hydroxypropyl cellulose, and sodium carboxymethyl cellulose. 5. The gelling agent for a gelling hydrophilic resin is a polyvalent metal silicate, a water-soluble alkaline earth metal salt, alum, a water-soluble aluminum salt, a water-soluble iron salt, a water-soluble manganese salt, a water-soluble zinc. The water leakage prevention material according to any one of claims 1 to 4, wherein the water leakage prevention material is at least one selected from a salt and an alkaline earth metal oxide. 6. A method for preventing water leakage, comprising installing the water leakage prevention material according to claim 1 in a water leakage infiltration path.