JPH08105184A - Tile bonding method that also serves as a waterproof function - Google Patents

Abstract

PURPOSE: To apply an urethane coating film waterproofing agent as an adhesive to the surface of a building skeleton and to maintain waterproofing efficiency of a building by press binding an exterior tile to the adhesive. CONSTITUTION: 100 pts.wt. urethane coating film waterproofing agent having polyisocyanate, polyol and a curing agent as main ingredients is mixed with approximate 1-15 pts.wt. a thixotropy imparting agent such as colloidal silica, a fatty acid amide wax, etc., to obtain an adhesive. The adhesive is uniformly applied to the setting bed such as concrete, motor, etc., with a trowel, a comb- trowel, etc., and an exterior wall tile is press bound to the adhesive. Accordingly, this tile adhering method is excellent in cracking and accordingly efficiency and waterproofing function can be sufficiently carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adhering an exterior tile to a base of concrete, mortar, ALC plate, wood, etc. of a building, and particularly by using a urethane coating waterproof material as an adhesive. The present invention relates to a tile adhering method for simultaneously imparting waterproofness to a building by adhering to each other.

[0002]

2. Description of the Related Art An inorganic material such as cement mortar has been conventionally used as an adhesive when bonding exterior tiles in a concrete building or a detached house. Furthermore, recently, organic materials such as epoxy adhesives have begun to be used.

[0003]

However, while the method of using cement mortar or the like as an adhesive agent can be expected to have high adhesive strength and durability, if the construction is not appropriate, the difference in thermal expansion between the base mortar and the concrete frame is expected. Etc.
There is a risk that the tiles may come off and cause serious consequences. Further, when a crack is generated in the concrete skeleton, the adhesive itself is also cracked, and the defective portion becomes a rainwater infiltration path, which may cause rain leakage.

On the other hand, in the method of using an epoxy adhesive, the adhesive is inferior in cold resistance, so that cracks may occur due to a heat cycle. In addition, since the elongation percentage of the adhesive is small, it cannot follow when a crack occurs in the concrete skeleton, the adhesive coating cuts, and the defective part becomes a rainwater infiltration route and causes rain leakage. There is a fear. Further, since the viscosity of the adhesive is high, workability is poor due to time-consuming kneading and the like, and there are problems such as skin damage due to the amine curing agent.

Therefore, the above problems are overcome, that is, the adhesive retains its waterproof function without cracking for a long period of time, and there is no risk of tile peeling off. There is a strong demand for a tile adhering method that excels in workability at the time.

[0006]

The present inventors have arrived at the present invention as a result of extensive studies on the above problems. That is, the present invention is characterized by using a urethane-based coating film waterproof material having excellent cold resistance and flexibility as an adhesive for tiles, has excellent workability, and has a long-term construction after construction. It is a tile bonding method that keeps the waterproof property and there is no risk of tile peeling. That is, the present invention is a tile adhering method which also has a waterproof function, characterized in that a urethane-based coating film waterproof material is used as an adhesive agent when adhering an exterior tile.

The urethane coating film waterproof material used as an adhesive for tiles in the present invention is polyisocyanate,
It can be obtained by mixing a curable composition containing a polyol and a cross-linking agent as main raw materials with a filler and the like, but a commercially available urethane-based coating film waterproof material may be used. Furthermore, JIS
It is more preferable that the waterproof material is compatible with A6021 "Roof waterproof coating material".

The urethane coating waterproof material used as an adhesive in the present invention may be either a one-component type or a two-component type. In particular, the one-component type is composed of a main component such as a two-component type and a curing agent. Since there is no need for weighing and mixing, it is preferable in terms of excellent workability.

When using a commercially available waterproof material as an adhesive in the present invention, in order to prevent the tile from shifting after the construction,
Further, it is preferable to mix and use a thixotropic agent.
The thixotropy-imparting agent may be compounded and placed in these waterproof materials in advance, or may be compounded on-site during construction.

Examples of the thixotropic agent are colloidal silica, fatty acid amide wax, aluminum stearate,
There are surface-treated bentonite, polyethylene short fibers, phenol resin short fibers, etc., 1 to 100 parts by weight of the waterproof material.
The amount is 15 parts by weight, preferably 3 to 10 parts by weight. If it is less than this, the thixotropy is insufficient and the tile is displaced, and if it is more than this, the viscosity of the adhesive becomes high and the workability at the time of construction deteriorates. Further, if necessary, a solvent, a curing accelerator, etc. may be added.

The bonding method according to the present invention is characterized by using a urethane type waterproof film as an adhesive, and the method can be carried out according to a conventional method. For example, trowel an adhesive on the base of concrete or mortar,
Apply evenly with a comb comb, spatula, brush, roll, etc., and press-bond the outer wall tiles on it. At this time, if necessary, in order to improve the adhesiveness between the base and the adhesive, a pretreatment of the base surface such as application of a primer may be performed.

[0012]

In the present invention, when the exterior tile is adhered to the foundation of concrete, mortar, ALC plate, wood, etc. of a building, a urethane-based waterproof film is used as an adhesive, so that workability is excellent and construction is possible. After that, a tile adhering method can be obtained in which the waterproofness of the building is maintained for a long period of time and there is no risk of the tile coming off.

[0013]

EXAMPLES Examples of the present invention will be described below. In the examples, “parts” indicates “parts by weight”. Shift resistance is set up vertically 8
After applying a tile adhesive to the surface of a mm thick asbestos slate board with a comb iron to a thickness of 2 mm, press the porcelain exterior tile with a back foot (225 mm × 60 mm × 10 mm, weight 332 g) at 23 ° C., The sample was evaluated by leaving it in 50% RH for 24 hours.

Adhesiveness is determined by the concrete pavement board (30c
m × 30 cm × 6 cm) with a comb iron to apply a tile adhesive to a thickness of 2 mm, and 5 cm × 5 cm × 1
Crimping a porcelain exterior tile cut to a size of 2 cm
The adhesive was left to stand in 3 ° C., 50% RH for 14 days to cure the adhesive, and then evaluated by a Kenken tensile tester. Further, if necessary, a concrete pavement board was used in which a primer (manufactured by Mitsui Toatsu Chemicals, Inc .: trade name Sun PC) was applied on the surface to a thickness of 0.3 mm and left for 1 hour to dry.

The elongation of the cured adhesive is measured according to JIS K6.
It was measured by 301. That is, the adhesive was applied to a thickness of 3 mm, left standing in 23 ° C. and 50% RH for 14 days to cure, and then measured with a tensile tester.

The crack followability is 120 mm wide x 200 m long
2 mm thick, 8 mm thick slate plates are butted against each other in the vertical direction, and the adhesive is applied to the thickness of 2 mm.
After curing in% RH for 14 days, it was pulled in the machine direction at a speed of 5 mm / min by a tensile tester to measure the elongation at the time of cutting the coating film.

Example 1 50 parts of a main component of a two-component urethane coating film waterproof material (manufactured by Mitsui Toatsu Kagaku Co., Ltd .: trade name San Shiraru C: JIS A 6021 "roof waterproof coating material" Category 1 compliant product) Curing agent 5
0 part and 10 parts of xylene were inserted into a mixing container and stirred with an electric mixer until uniform. Subsequently, colloidal silica as a thixotropic agent (manufactured by Nippon Aerosil Co., Ltd .:
5 parts of trade name Aerosil # 200) was added and stirred until uniform to obtain a tile adhesive.

The adhesive for tiles is, as shown in Table 1,
There was no misalignment of tiles and the adhesiveness was excellent. Further, it can be seen that the adhesiveness after curing is more excellent in crack followability than the elongation percentage of the adhesive, and that the waterproof function is sufficiently fulfilled.

Example 2 100 parts of a one-component urethane coating film waterproofing material (manufactured by Mitsui Toatsu Chemicals, Inc .: trade name San Sylal Super), 10 parts of xylene, and γ-glycidoxypropyltriene as an adhesiveness-imparting agent. 1 part of methoxy cisson (manufactured by Nippon Unicar Co., Ltd .: trade name A-187) was inserted into a mixing container and stirred with an electric mixer until uniform. Next, colloidal silica (product name Aerosil # 20 manufactured by Nippon Aerosil Co., Ltd.)
0) 5 parts was added and stirred until uniform to obtain a tile adhesive.

The adhesive for tiles is as shown in Table 1.
There was no misalignment of tiles and the adhesiveness was excellent. Further, it can be seen that the adhesiveness after curing is more excellent in crack followability than the elongation percentage of the adhesive, and that the waterproof function is sufficiently fulfilled.

Comparative Example 1 A commercially available two-component polyamide epoxy resin adhesive was used as an adhesive for tiles, and the same evaluation as in Example was carried out.

As shown in Table 1, since the adhesive after curing has a low elongation and poor flexibility, when a concrete skeleton is cracked, it cannot sufficiently follow it and does not have a waterproof function. Met.

Comparative Example 2 The same evaluation as in the example was carried out using a commercially available one-pack type elastic epoxy resin adhesive as the tile adhesive. As shown in Table 1, since the adhesive after curing had an insufficient elongation, it could not sufficiently follow the cracks in the concrete skeleton and could not fulfill the waterproof function.

[0024]

[Table 1]

[0025]

EFFECTS OF THE INVENTION The tile bonding method of the present invention forms a waterproof coating layer made of a urethane resin having excellent flexibility and cold resistance between the surface of the building frame and the tile, so that it can be used for a long period of time. The watertightness of the building is preserved and the risk of tile stripping is avoided.

Claims (2)

[Claims] 1. A urethane-based waterproof film is used as an adhesive when adhering exterior tiles.
A tile bonding method that also serves as a waterproof function. 2. A urethane coating film waterproof material 100 as an adhesive.
The tile adhering method according to claim 1, wherein a mixture of 1 part by weight to 15 parts by weight of the thixotropic agent is used.