JP2001279229A - Water stop material and method for stopping water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a water stop material applicable to a vertical surface, simply applicable even to a complicated shape and exhibiting sufficient water stop effects and to provide a method for stopping water among sheetlike or platy waterproof materials using the water stop material. SOLUTION: This water stop material comprises an unvalcanized rubber composition consisting essentially of an unvalcinized rubber and having >=100 deg.C heat-resistant flow. The method for stopping water comprises joining superimposed parts among the sheetlike or platy waterproof materials using the water stop material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stopping material and a water stopping method, and more particularly to a water stopping material for waterproofing between underwater structures and other waterproof materials and a method for stopping water between the waterproofing materials.

[0002]

2. Description of the Related Art Conventionally, for waterproofing an underground structure or the like, a sheet-like or plate-like waterproof material is applied to the ground or a ground made of wood, metal, synthetic resin or the like is formed on the ground. After that, a sheet-shaped or plate-shaped waterproof material (polyolefin resin, vinyl chloride resin, synthetic rubber, etc.) is applied thereto, and concrete forming the underground structure body is brought into contact with these waterproof materials. It is done by setting up.

However, the shape of the ground is complicated, and such a waterproof material is applied by joining at least a plurality of waterproof materials. Here, the bonding between the sheet-like or plate-like waterproof materials requires the waterproofness between the waterproof materials at the same time as the adhesion between the waterproof materials. Conventionally, the overlapped portions are welded (or welded or fused) by a welding machine. How to wear)
A method of bonding the overlapped portion of the waterproof material with a hot-melt type adhesive or the like; hitting a nail or the like on the overlapped portion of the waterproof material, and attaching the end of the waterproof material or the nail head to a water-swellable material or a hot melt. A method of sealing with a mold adhesive or the like has been performed.

If there is an obstacle such as a pillar or a beam, a portion of the obstacle is cut off, and a space between the end of the waterproof material and the pillar or the beam is made of a water-expandable material, a hot-melt adhesive, or a putty material. It is performed to stop the water.

[0005]

However, the method using a hot-melt adhesive as described above can be applied to a horizontal surface, but most of the external waterproofing of an underground structure or the like is performed on a vertical surface. When a hot-melt adhesive is applied to such a location, the molten adhesive drips, and sufficient adhesion to the overlapping portion of the waterproof material is often not performed. In addition, welding by a welding machine cannot cope with a complicated shape due to an overhang of the welding machine, and it is also difficult to reliably stop water.

Further, the water-swellable material stops water by its inflation pressure, but the waterproof material often has flexibility to cope with various shapes. The expansion pressure was absorbed by the deformation of the waterproof material, and sufficient water stopping could not be achieved.

Accordingly, an object of the present invention is to overcome the above-mentioned disadvantages, apply to vertical surfaces, easily apply to complicated shapes, and exhibit a sufficient water-stopping effect. Another object of the present invention is to provide a method for stopping water between a sheet-shaped or plate-shaped waterproof material using the water-stopping material.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have found that the above object can be achieved by using a specific non-vulcanized rubber composition as a water-stopping material. As a result, the present invention has been completed.

That is, the water-stopping material of the present invention is characterized by comprising a non-vulcanized rubber composition containing a non-vulcanized rubber as an essential component and having a heat resistance flow of 100 ° C. or more.

In the water-stopping material of the present invention, it can be suitably used between a sheet-shaped or plate-shaped waterproof material.

[0011] The water stopping method of the present invention is characterized in that the sheet-shaped or plate-shaped waterproof material is joined by using the above-mentioned water stopping material.

In the water stopping method of the present invention, it is preferable to heat the non-vulcanized rubber composition at a temperature higher than its heat resistant flow and at a temperature lower than the heat resistant temperature of the waterproof material.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a waterproof material according to the present invention will be described. The present invention is a water-stopping material comprising a non-vulcanized rubber composition containing a non-vulcanized rubber as an essential component and having a heat resistance flow of 100 ° C. or higher.

The non-vulcanized rubber, which is an essential component used in the present invention, is not particularly limited. Natural rubber, synthetic rubber, and recycled rubber can be used, but non-vulcanized rubber is preferably used. It is preferable to use a vulcanized butyl rubber and / or a non-vulcanized butyl regenerated rubber in order to achieve the object of the present invention.

In the present invention, the non-vulcanized rubber composition containing the non-vulcanized rubber as an essential component has a heat resistant flow of 100 ° C.
It is necessary to be above. Here, "heat resistant flow"
Is defined as follows. That is, the non-vulcanized rubber composition is applied (sticked) to a vertical plate in a size of 15 mm × 15 mm × 8 mm, and gradually heated to a temperature at which the “sag” of the non-vulcanized rubber composition becomes 5 mm. It is.

When the heat-resistant flow is lower than 100 ° C., when the non-vulcanized rubber composition is applied to a vertical plate by heating, the composition has a large “sag” and cannot be applied satisfactorily. Further, if the heat resistance flow is lower than 100 ° C., the strength is insufficient even when applied to a horizontal surface, and this may cause water leakage in a structure or the like which receives stress over time.

There is no particular upper limit to the heat-resistant flow, and the higher the heat-resistant flow, the stronger the strength.
It is preferable to set the temperature to a temperature lower by from 50C to 50C. this is,
When the water-stopping material of the present invention is heated and applied, it is preferable to perform the application at a temperature higher than the heat-resistant flow temperature by 10 to 50 ° C. in terms of workability, and the application temperature should be equal to or lower than the heat-resistant temperature of the application target. The reason is that even in such a construction, the waterproof sheet or the like to be constructed is not damaged.

There are various methods for adjusting the heat resistant flow within the above range, and there is no particular limitation. For example, there is a method of adjusting the molecular weight or the molecular weight distribution of the non-vulcanized rubber which is an essential component so that the heat resistant flow is within the above range. The adjustment of the molecular weight or the molecular weight distribution may be specifically performed by a conventionally known method.

Another method for adjusting the heat resistant flow within the above range, or a method in which a non-vulcanized rubber composition is blended with a component other than the non-vulcanized rubber as an essential component. Examples of the component other than the non-vulcanized rubber include, for example, conventionally known softeners and tackifiers. These components other than the non-vulcanized rubber can be used within a range that does not hinder the above-mentioned purpose, but it is preferably 200% by weight or less based on the non-vulcanized rubber.

As a specific example of the non-vulcanized rubber composition having a heat resistant flow of 100 ° C. or higher, for example, “Tokiwa Melt TK-101” manufactured by Tokiwa Kasei Co., Ltd. can be used.

The water-stopping material of the present invention has tackiness and elasticity even at room temperature, and has some formability, so that it can be used for various applications. For example, if a hot melt discharger (for example, "Thermoflow Mini 5" manufactured by PYLES) is used, it can be applied freely, and can be used for various purposes.

Further, the water-stopping material of the present invention can be suitably used between sheet-like or plate-like waterproof materials. Such sheet-like or plate-like waterproof material is used for waterproofing underground structures, and is made of a material such as polyvinyl chloride resin, polyolefin resin such as polyethylene, cross-linked rubber such as synthetic rubber, and the like. There are various types, from smooth to embossed, and also from soft to hard.

Such a waterproof material is applied, for example, by applying the waterproof material to the ground or by forming a wooden, metal, or synthetic resin base on the ground, and then applying the waterproof material to the base. Then, concrete constituting the underground structure skeleton is cast in contact with these waterproof material surfaces.

Accordingly, such a waterproof material is formed by bonding (adhering) a plurality of waterproof materials in order to match the shape of the underground structure or the ground. The waterproof material according to the present invention is suitable for joining (adhering) such waterproof materials to each other, and at the same time, for blocking (water stopping) water leakage from the joint between the waterproof materials. It can be constructed by applying to the overlapping portion between the water-stopping materials by the melt discharger.

Next, an embodiment of the water stopping method of the present invention will be described in detail. The water stopping method of the present invention is to stop water between the sheet-shaped or plate-shaped waterproof material by using the above-described water stopping material of the present invention. Preferably, the non-vulcanized rubber composition is heat-resistant. Heating is performed at a temperature equal to or higher than the flow and at a temperature equal to or lower than the heat resistant temperature of the waterproof material.

The amount of the waterproofing material to be applied to the sheet-shaped or plate-shaped waterproof material is not particularly limited, but it is preferable that the waterproof material is applied to the overlapping portion of the waterproof material with a width of about 20 to 40 mm. It is preferable in terms of water stoppage.

In the case where the surface of the waterproof material is embossed, it is preferable to construct the waterproof material so as to have a thickness of about 2 to 5 mm from the viewpoint of waterproofness.

In the present invention, when the water-stopping material is heated and applied to the sheet or plate-shaped water-stopping material, the water-stopping material is applied at a temperature higher than the heat-resistant flow temperature of the water-stopping material. The water-stopping material tends to "drip", but is immediately exposed to normal temperature after the discharge of the water-stopping material, so that the "waterdrop" is slight and does not hinder the construction on a vertical surface.

[0029]

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

Example 1 Concrete-adhesive waterproof sheet made of polyethylene resin with a surface embossing of 20 cm × 20 cm × 3 mm (“ADEKA VE sheet” manufactured by Asahi Denka Kogyo Co., Ltd.): Heat resistance temperature: about 180
C) In order to superimpose two sheets as test pieces with a width of 50 mm, the water-stopping material of the present invention consisting of "Tokiwa Melt TK-101" (heat-resistant flow 130 ° C) manufactured by Tokiwa Chemical Co., Ltd. (PYLES “Thermo Flow Mini 5”) using a 30 mm width and 3 m
m at 165 ° C (10 mm from the end of the test piece)
mm position), and two test pieces were overlapped and bonded. The work was performed so that the bonding surface was vertical, but the water-stopping material did not protrude from the test piece, and the work was satisfactorily performed.

When the water stop pressure of the overlapping portion was measured,
It was 0.5 MPa. Further, the peeling stress of the two test pieces was 0.2 MPa and the shear stress was 0.5 MPa, which was good as a water stopping material between waterproof materials of the underground structure.

Example 2 One test piece used in Example 1 had a diameter of 5 cm at the center.
And a steel cylinder having a diameter of 5 cm and a thickness of 1 cm was fitted so as to fit into this hole, and the same water-stopping material as in Example 1 was discharged to the boundary between the test piece and the cylinder by the same hot melt. Coating was performed with the device.

When the water stop pressure at the boundary was measured, it was found that the water pressure was 0.1 mm.
It was 5 MPa, which was good as a waterproof material for underground structures and a waterproof material between steel columns.

[0034]

According to the water stopping material and the water stopping method of the present invention, it can be applied to a vertical surface, can be easily applied to a complicated shape, and can exhibit a sufficient water stopping effect. .

Claims (4)

[Claims] 1. A water-stopping material comprising a non-vulcanized rubber composition containing a non-vulcanized rubber as an essential component and having a heat resistance flow of 100 ° C. or higher. 2. The waterproof material according to claim 1, wherein the waterproof material is used between a sheet-shaped or plate-shaped waterproof material. 3. A water stopping method comprising joining the sheet-shaped or plate-shaped waterproof material using the water stopping material according to claim 1. 4. The water stopping method according to claim 3, wherein the non-vulcanized rubber composition is heated at a temperature not lower than its heat resistant flow and at a temperature not higher than the heat resistant temperature of the waterproof material.