JPS591874B2 - Tile tipping method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of the tile pre-applying method in which concrete pouring and tile attaching are performed at the same time when attaching tiles to concrete walls, etc. 3. The method for attaching tiles is the Dango attaching method. There are methods such as crimping method, adhesive method, unit pasting method, multiple method using trigger material, pouring tiles, and tile tipping method, but the tile tipping method allows concrete pouring and tile pasting at the same time. There are many advantages in construction because there is no peeling of tiles and the finish is in good condition.

The tile tipping method usually uses an adhesive (
The tiles are pasted using adhesive tape (pressure-sensitive adhesive), adhesive tape, or adhesive sheets, concrete is poured, and after the concrete has hardened, the formwork (or support) is peeled off from the tiles and the tiled wall surface is removed. It is a method of making.

With the traditional method of using adhesives to bond tiles and formwork, the strong adhesive force required before concrete pouring does not change even after concrete pouring.
There were problems in that a large amount of force was required to remove the formwork etc. from the tile, and it was necessary to be careful not to peel off the tile.Additionally, there were cases where adhesive remained on the tile surface. It often requires

The present inventors have developed an improved tile that can be easily installed on concrete walls, etc., improves work efficiency, has a very beautiful finish, and does not cause tiles to peel off after installation. As a result of intensive research on construction methods, they discovered that the above objective could be achieved by using an isocyanate compound, which is a raw material for urethane resin, as an adhesive to adhere tiles to concrete formwork, and completed the present invention.

That is, the present invention uses a water-soluble or water-dispersible adhesive that hardens at room temperature as an adhesive for attaching tiles to concrete formwork in a tile-adhering method in which concrete pouring and tile pasting are performed at the same time. The present invention provides a tile tipping method using urethane prepolymer or two-component urethane that cures at room temperature.

The adhesive used in the present invention must be a room-temperature-curing isocyanate compound that reacts and hardens rapidly at room temperature because it is applied on-site.

There are urethane prepolymers and two-component urethanes as such isocyanate-based compounds.Urethane prepolymers contain two isocyanate groups, which are components of two-component urethanes.
It is a product obtained by partially reacting a compound (incyanate component) having at least one isocyanate group with a polyol (polyol component) so that isocyanate groups remain.

When using two-component urethane, it is necessary to weigh each of the two components and the catalyst to obtain the desired curing time, which is time-consuming, so urethane prepolymers are more convenient to use. .

The advantage of urethane prepolymers is that they are water-soluble or water-dispersible, which harden easily with moisture in the air, but after concrete is poured, they are gradually hydrolyzed by the alkaline water that seeps out of the concrete, reducing adhesive strength. It is desirable because it is expressed more strongly.

In the case of two-component urethane, it is desirable to use a hydrophilic polyol component.

Examples of compounds having two or more incyanate groups used as the incyanate component of two-component urethane or as a raw material for urethane prepolymers include tolylene diisocyanate, tolylene diisocyanate distillation residue, polymethylene polyphenylisocyanate, and methylene diphenyl diisocyanate. , xylylene diisocyanate, 1.5
- Aromatic isocyanate compounds such as naphthylene diisocyanate, aliphatic or alicyclic isocyanate compounds such as hexamethylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated methylene diphenyl isocyanate, 1.1-1 Lis(hydroxymethyl ) adduct incyanate compounds such as propane-2-methyl-m-phenylene diisocyanate.

Particularly preferred are tolylene diisocyanate, methylene diphenyl diisocyanate, and hexamethylene diisocyanate because they are economical and inexpensive.

Polyol components of two-component urethane or raw material polyol components of urethane prepolymers include polyalkylene glycol, polyalkylene glycol alkyl ether (polyol), polyalkylene glycol allyl ether (polyol), polyalkylene glycol allyl alkyl ether (polyol), etc. obtained by the condensation reaction of polyether compounds, or polyhydric carboxylic acids such as adipic acid and phthalic acid with ethylene glycol, fluoropylene glycol, diethylene glycol, 4-butanediol, trimethylolpropane, hexanediol, etc. Polyester-based products are used, and H(+0
("CH2) 4-3-I-rLOH may be used, but it is preferable to use polyether-based and polyester-based compounds because they are versatile and inexpensive as polyol materials.

The polyether compound is a polymer or copolymer of alkylene oxide such as ethylene oxide and propylene oxide, and has a molecular weight of 300 to 10,000 and has two or more hydroxyl groups at the end.

The urethane prepolymer is obtained by reacting the above-mentioned isocyanate component and polyol component using a slight excess of the incyanate component so that the ends thereof become incyanate groups.

When a urethane prepolymer is used, it is used directly as it is or as an aqueous solution or dispersion.

In the two-component urethane, it is preferable that the incyanate component and the polyol component are reacted in such a range that the number of incyanate groups is 0.5 to 10 per hydroxyl group.

By using urethane prepolymer one- or two-component urethane to bond concrete formwork and tiles,
The adhesive can be easily applied to the formwork, making it easy to attach the tiles.The adhesive quickly hardens at room temperature to form a resin layer, so the required adhesive hardness can be achieved in a short time, making it suitable for concrete pouring. Tiles never peel off before.

Furthermore, after pouring concrete, the strongly alkaline water that seeps out from the concrete penetrates into the hardened resin layer and gradually hydrolyzes the hardened resin, reducing the adhesive strength, especially the strength of the adhesive surface with the tile surface. Therefore, after the concrete hardens, the formwork can be easily peeled off from the tile surface, greatly improving work efficiency.Moreover, there is no adhesive left on the tile surface, and there is no change in the quality of the tile base, resulting in a smooth finish. The tiles are very beautiful, and the tiles do not peel off after installation.

Any conventionally used formwork for concrete pouring can be used in the present invention.

Examples of such formwork include plywood, precast concrete panels, metal plates, and the like.

The tiles used in the present invention can be any of the tiles normally used in the tile attachment method, such as exterior tiles, interior tiles, floor tiles, mosaic tiles, etc., regardless of shape, size, material, etc.

Furthermore, the effects of the present invention can be further exhibited by using a tile whose surface is coated with glaze.

Next, the drawings will be explained.

Figures 1 to 3 show the process of the tile tipping method of the present invention. Figure 1 shows the adhesive of the present invention applied to the formwork 1, and then the surface side of the tile 30 is applied to the adhesive layer. This shows the state in which the adhesive has been applied and cured to become a resin.

2 in the figure shows a cured resin layer of the adhesive, 4 in the figure shows a joint part, and 5 in the figure shows a raised part of the cured resin layer that has penetrated into the joint part 4.

Figure 2 shows the condition after pouring concrete.

6 in the figure shows the concrete, and 7 in the figure shows the joint penetration part of the concrete.

Figure 3 shows the state after the concrete has hardened and the formwork has been peeled off, and the cured resin layer has been peeled off from the tile surface together with the formwork.

Figure 4 shows another construction method for pasting tiles onto the formwork. After pasting the tiles on the formwork and curing the adhesive,
A state in which a plate joint 8 or a joint sealant is applied to the joint part 4 is shown.

FIG. 5 shows an example of a construction method for assembling a formwork for pouring concrete, in which a formwork 1 for pouring concrete to which tiles 3 are attached via a cured resin layer 2 of adhesive is placed at a positioning member 9. This shows the state in which concrete 6 is poured with piles (separators) 11 being driven into and supported by support plates 10 provided at a predetermined distance from the formwork 1 in the formwork 12 at the portion that will become the inner wall of the concrete.

Since the cured resin layer of the adhesive is peeled off together with the formwork, in order to easily reuse the formwork, it is preferable to mix an aggregate such as porcelain powder with the adhesive.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Random polymer (diol) with an average molecular weight of 4800 and a weight ratio of ethylene oxide and propylene oxide of 4:1
Add 10 parts by weight of porcelain powder to 90 parts by weight of urethane prepolymer obtained by reacting 1 mol of tolylene diisocyanate-80 with 4 mols of tolylene diisocyanate-80 at 50 to 60°C for 1 hour and 100°C for 3 hours, and make it uniform. The urethane prepolymer composition kneaded with
110%) attached to the surface.

Next, in accordance with the method shown in FIG. 5, the plywood to which the tiles have been pasted is combined with the aforementioned plywood to which the tiles have been pasted using the positioning member, and 20rIt! The separator was fixed by driving it into the formwork for the part that would become the inner wall of the concrete using support plates placed at intervals of about n, and cement milk was poured between the back side of the tile and the formwork for the part that would become the inner wall of the concrete. .

After the concrete had solidified, when the support plate, separator, plywood, etc. were removed, the urethane gel was beautifully peeled off from the tile surface.

Additionally, the tiles could be installed on the concrete base wall without peeling.

Example 2 0.2 mol of a random polymer (triol) with an average molecular weight of 1500 and a weight ratio of ethylene oxide and propylene oxide of 9:1 was mixed with 2.0 mol of tolylene diisocyanate-80.
Using a urethane prepolymer composition consisting of 70 parts by weight of a urethane prepolymer obtained by reacting 2 moles at 50 to 60°C for 1 hour and at 100°C for 2 hours, 20 parts by weight of dibutyl phthalate, and 10 parts by weight of porcelain powder. The same mortar construction as in Example 1 was carried out.

Example 3 Random polymer (diol) with an average molecular weight of 2000 and a weight ratio of ethylene oxide and propylene oxide of 9=1
0.8 mol, 0.2 mol of rantom polymer (hexaol) with an average molecular weight of 5000 and a weight ratio of ethylene oxide and propylene oxide of 9:1, 2.4 mol of tolylene diisocyanate-80, and triphenylmethane. Mortar construction similar to Example 1 was carried out using a urethane prepolymer obtained by reacting 0.4 mol of triisocyanate at 40 to 50°C for 2 hours and at 90°C for 3 hours.

Example 4 Random polymer (diol) with an average molecular weight of 4800 and a weight ratio of ethylene oxide and propylene oxide of 4:1
0.63 mol of tolylene diisocyanate-80.
057 mol and 0.057 mol of diphenylmethyldiyncyane).
A mixture of 60 parts by weight of urethane prepolymer obtained by reacting 16 mol of urethane prepolymer with 40 parts by weight of methyl ethyl ketone for 1 hour at 50 to 60°C and 40 parts by weight of methyl ethyl ketone was made into a 20% aqueous solution, and the same mortar as in Example 1 was prepared. Construction was carried out.

Example 5 0.3 mol of a random polymer (triol) with an average molecular weight of 3000 and a weight ratio of ethylene oxide to propylene oxide of 9=1, and 0.3 mol of hexamethylene diisocyanate.
A mixture of 60 parts by weight of urethane prepolymer and 40 parts by weight of methyl ethyl ketone obtained by reacting 6 moles at 50 to 60°C for 1 hour and 90 to 100°C for 3 hours was
An aqueous solution was used, and mortar construction similar to that in Example 1 was performed.

Example 6 0.5 mol of propylene oxide polymer (triol) with an average molecular weight of 400 and 8000 mol of tolylene diisocyanate
．． Mortar construction similar to Example 1 was carried out using a urethane prepolymer obtained by reacting 67 mol of urethane at 40 to 50°C for 2 hours and at 80°C for 1 hour.

Example 7 Random polymer (diol) with an average molecular weight of 6000 and a weight ratio of ethylene oxide and propylene oxide of 1=1
Mortar construction similar to Example 1 was performed using a urethane prepolymer obtained by reacting 0.04 mol and 0.28 mol of tolylene diisocyanate at 50 to 60°C for 1 hour and at 80°C for 3 hours.

Example 8 0.2 mol of a polyester polyol with an average molecular weight of 1200 obtained by a condensation reaction of adipic acid and ethylene glycol and 0.6 mol of tolylene diincyanate-80
Mortar construction similar to Example 1 was carried out using a urethane prepolymer obtained by reacting moles at 50 to 60°C for 1 hour and at 100°C for 3 hours.

Example 9 64 parts by weight of a component consisting of 70 parts by weight of polypropylene glycol with an average molecular weight of 290 obtained by reacting ethylenediamine with 4 moles of propylene oxide, 20 parts by weight of high-boiling naphtha, and 10 parts by weight of porcelain powder was mixed with polymethylene. The same mortar construction as in Example 1 was carried out using the urethane obtained by adding it to 36 parts by weight of polyphenylisocyanate and kneading it uniformly.

Example 10 0.2 moles of a block polymer with an average molecular weight of 1300, in which glycerin was reacted with 5.3 moles of propylene oxide and further reacted with 20 moles of ethylene oxide, and 0.2 moles of tolylene diisocyanate-80 were heated at 40 to 50°C.
90 parts by weight of the urethane prepolymer obtained by reacting at 70 to 80°C for 1 hour and 1 part of dibutyl phthalate.
Mortar construction similar to that in Example 1 was carried out using a mixture consisting of 0 parts by weight.

The urethane gel bodies of Examples 2 to 10 could be easily peeled off from the tile surface when the plywood was removed, and beautiful mortar construction with no peeling or shifting of the tiles was achieved.

Example 11 Using the same urethane prepolymer composition as in Example 1,
It was applied to a 3x4% formwork according to Example 1, and the surface of a large glazed tile (150x350%) was immediately attached thereto.

The formwork with this tile pasted is fixed at the construction site,
100rr? Over the years, we used the in-situ formwork pre-casting method in some parts of the building, in which cement milk was poured between the back of the mortar and the concrete base wall, and the formwork was removed after it solidified.

There was no shifting or peeling of the tiles, and the tiles were beautifully installed.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic cross-sectional views explaining one embodiment of the present invention, Figure 3 is a schematic cross-sectional view showing a tile construction body constructed from the same side, and Figures 4 and 5 are respectively FIG. 7 is a schematic cross-sectional view illustrating another embodiment of the invention. 1... Concrete pouring formwork, 2...
-Resin layer, 3...Tile, 6...Concrete layer.

Claims (1)

[Claims] 1. In the tile attachment method, which involves pouring concrete and pasting tiles at the same time, room-temperature curing, water-soluble or water-dispersible urethane prepolymers or room-temperature curing adhesives are used to attach the tiles to the concrete formwork. A tile tipping method characterized by the use of hardening two-component urethane.