JPH10306273A - Adhesive composition for tile floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a two-pack type adhesive of fast setting type and room temperature setting type for a tile floor, having excellent adhesive strength after curing and excellent in durability and having rubber-like elasticity. SOLUTION: This adhesive composition comprises an A-agent containing 3-20 pts.wt. of a diluent and 25-100 pts.wt. of calcium carbonate to total 100 pts.wt. of a hardener comprising a modified silicone compound having at least one reactive silicon group in a molecule and a silanol condensing catalyst, and a B-agent containing 3-20 pts.wt. of a diluent, 25-100 pts.wt. of calcium carbonate and 0.5-5 pts.wt. of water to 100 pts.wt. of an epoxy resin. Viscosities of the A-agent and the B-agent measured by using a BH-type viscometer at 10 rpm rotation number and 20 deg.C are respectively 10,000-30,000 mPa.s.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an adhesive composition for tile floors.

[0002]

2. Description of the Related Art Conventionally, as a two-part curable composition curable at room temperature, various types of rubbers have been used to soften and impart flexibility to a cured product of an epoxy-based curable composition. And those obtained by modifying the main chain and / or side chain of an epoxy compound with a urethane group or various rubbers are known.

Recently, for example, Japanese Patent Application Laid-Open No. 61-26872
No. 0 and Japanese Patent Laid-Open No. 4-1220,
As a composition exhibiting rubber elasticity, a two-pack type curable composition comprising a modified silicone, an epoxy resin and an epoxy curing agent has been proposed. This kind of composition is used in an adhesive portion which is repeatedly subjected to distortion and stress by making use of its rubber properties, and greatly contributes to improvement of adhesive reliability and adhesive durability.

A two-part curable composition comprising a modified silicone, an epoxy resin and an epoxy curing agent is disclosed in, for example, JP-A-7-158243 and JP-A-7-158243.
It is used as an adhesive for bonding a tile to a box made of resin such as polyethylene or polypropylene as described in Japanese Patent No. 42349. In this way, the tile is bonded to the resin box (usually,
A plurality of (usually nine) units are combined to form a floor material constituting unit (usually referred to as a unit floor material). The unit flooring material manufactured in the factory in this manner is recently used to form a tiled floor by being laid on a floor base material in a veranda or a balcony of a building. The construction method of such a tiled floor is conventionally compared with the construction method in which tiles are arranged in a predetermined arrangement on a floor base material at the site and then fixed to the base material with mortar or adhesive. It is easy to use, requires no skill, and requires a short construction period.

As the adhesive composition for tile floor used in the production of this unit alone, the above-mentioned modified silicone,
When a two-part mixed type curable composition comprising an epoxy resin and an epoxy curing agent is used, there are the following problems. If the viscosity of the curable composition after mixing the two components is high, a sufficient bonding area cannot be obtained, and as a result, sufficient bonding strength cannot be obtained. Even if the viscosity of the curable composition after mixing the two liquids becomes a desired viscosity, when there is a large difference between the viscosities of the respective liquids before mixing, when the weighing and mixing are performed in the automatic mixing coating machine, As a result, it is difficult to adjust the mixing ratio accurately. In addition, when the amount of application is increased, the air contact portion on the surface hinders the transmission of moisture to the inside, so that it takes too much time to cure the inside.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide, after curing, good adhesive strength, excellent durability, rubber-like elasticity, and rapid curing. An object of the present invention is to provide a two-part mixed type tile floor adhesive composition curable at room temperature.

[0007]

According to the present invention, there is provided an adhesive composition for a tile floor according to claim 1 wherein at least one adhesive composition per molecule is present.
A modified silicone compound having two reactive silicon groups, a silanol condensation catalyst, and a curing agent for an epoxy resin;
A agent containing 3 to 20 parts by weight of a diluent and 25 to 100 parts by weight of calcium carbonate with respect to 00 parts by weight, and 3 to 20 parts by weight of a diluent and 25 to 100 parts by weight of calcium carbonate with respect to 100 parts by weight of an epoxy resin And B agent containing 0.5 to 5 parts by weight of water.

The adhesive composition for tile floors according to claim 2 of the present invention has a viscosity of 10,000 parts for each of the A agent and the B agent measured at a rotation speed of 10 rpm and a temperature of 20 ° C. using a BH type viscometer. 2. The pressure is from 1 to 30000 mPa · s.
It is an adhesive composition for tile floor described.

The tile floor adhesive composition according to claim 3 of the present invention, wherein the thix index of the agent A and the agent B is 1.0 to 5.0, respectively. It is an adhesive composition for use. However, the thixo index is determined by using a BH type viscometer and (viscosity measured at a rotation speed of 2 rpm and a temperature of 20 ° C.) / (Viscosity measured at a rotation speed of 20 rpm and a temperature of 20 ° C.).

Hereinafter, each component of the composition of the present invention will be described in detail.

The modified silicone compound, which is one of the components of the agent A, has the function of imparting rubber-like flexibility to the cured product obtained from the composition of the present invention. It is a silicone compound having one reactive silicon group. Examples of the polymer compound used to form the skeleton of this compound include polyethers obtained by polymerization of cyclic ethers such as propylene oxide, ethylene oxide, and tetrahydrofuran;
Examples include polyesters obtained by condensation of a dibasic acid such as adipic acid and glycol or ring-opening polymerization of lactones. These polyether-based compounds and polyester-based compounds are preferable because they have good water resistance and are inexpensive, and can easily introduce a reactive silicon group into a molecular terminal and can be easily handled as a liquid. Compounds having a reactive silicon group at least at one end of the polypropylene oxide are particularly preferred.

The modified silicone compound may have a functional group capable of reacting with the epoxy resin, as long as it imparts flexibility to the cured product obtained from the composition of the present invention.

The functional group capable of reacting with the epoxy resin includes an amino group, a mercapto group, an epoxy group, a carboxyl group and the like. Further, the reactive silicon group contains a silicon atom to which a hydrolyzable group or a hydroxyl group is bonded,
A group that can be crosslinked by a silanol condensation reaction. Examples of the hydrolyzable group include general groups such as a halogen atom, an alkoxy group, an acyloxy group, an aminooxy group, and a mercapto group.The alkoxy group is preferred because it has mild hydrolyzability and is easy to handle. Is particularly preferred. A typical example of the reactive silicon group is described in JP-A-61-2.
And a methyldimethoxysilyl group as disclosed in JP-A-68720. Specific examples of the modified silicone compound as described above include “Silyl SAX350” and “Silyl SAT” from Kaneka Chemical Industry.
030 ".

The silanol condensation catalyst, which is another component of the agent A, acts as a catalyst for curing the modified silicone compound. Examples of the silanol condensation catalyst include dibutyltin dilaurate, dibutyltin dioxide,
Organic tin catalysts such as dibutyltin phthalate, dibutyltin bisthioglycolate, and dibutyltin dichloride can be exemplified, but dibutyltin phthalate is particularly preferred. As the silanol condensation catalyst, a commercially available product “SB-65” manufactured by Sankyoki Gosei Co., Ltd. can also be used.

[0015] If the compounding ratio of the silanol condensation catalyst is too small, a sufficient effect as a condensation catalyst of the modified silicone compound may not be exhibited, and uncured portions may remain. 0.5 to 5 parts by weight is preferable with respect to 100 parts by weight of the modified silicone compound.

The curing agent for the epoxy resin, which is another component of the agent A, includes aliphatic polyamines, modified aliphatic polyamines, amidoamines, polyamides, alicyclic polyamines, modified alicyclic polyamines, modified aromatic polyamines, 3
It is an amine compound such as a secondary amine, but is not limited to these amine compounds, and a general epoxy resin curing agent can be used. Specific examples of epoxy resin curing agents include polyethylene tetramine, tetraethylene pentamine, diethylaminopropylamine, N-aminoethylpiperazine, isophoronediamine, 2,4,6-tris (dimethylaminomethyl) phenol, and the like. Tertiary amines are preferred from the viewpoint of the physical properties of the cured product. As a curing agent for the epoxy resin, a tertiary amine compound “DMP-30” manufactured by Yuka Shell may be used.

If the proportion of the curing agent in the epoxy resin is too small, a sufficient effect as the curing agent may not be obtained. If the proportion is too large, the effect corresponding to the blending amount is not improved. Since the curing agent acts as a plasticizer and may cause a decrease in cohesive strength, the amount is preferably 3 to 10 parts by weight based on 100 parts by weight of the modified silicone compound.

The diluent, which is another component of the agent A, acts as a viscosity modifier. As a diluent, D
Plasticizers such as OP, DIDP and chlorinated paraffin; reactive diluents usually used as diluents for epoxy resins, such as monoglycidyl ether; toluene, methyl cellosolve, ethyl cellosolve, propyl cellosolve, butyl cellosolve, methyl ethyl ketone, alcohol, Examples thereof include a solvent represented by acetone and the like, but are not particularly limited.

If the compounding ratio of the diluent is too small, the effect of adjusting the viscosity cannot be obtained, and if it is too large, the cured product of the adhesive composition for tile floor becomes brittle. Total of agents 1
It is limited to 3 to 20 parts by weight with respect to 00 parts by weight.

Calcium carbonate, which is another component of the agent A, acts as a thickener and a bulking agent,
It acts as a strength enhancer for the adhesive layer after curing of the tile floor adhesive composition. As calcium carbonate, any calcium carbonate can be used, and examples thereof include colloidal light calcium carbonate, fine calcium carbonate, heavy calcium carbonate, and surface-treated fine calcium carbonate.

Here, colloidal light calcium carbonate is light calcium carbonate in a special dispersed state,
It has an average particle diameter of 0.1 to 10 μm and an apparent specific gravity of about 0.2 g / ml.

The finely divided calcium carbonate is obtained by further pulverizing light calcium carbonate.
It has a mean particle size of 15 μm and an apparent specific gravity of 0.25 to 0.4 g / ml.

The surface-treated fine calcium carbonate is obtained by treating the surface of the above-mentioned colloidal light calcium carbonate with a fatty acid or rosin to make the surface hydrophobic.

As calcium carbonate, hydrous calcium carbonate which has not been subjected to surface treatment can also be used.

Since the modified silicone compound constituting the adhesive remarkably dislikes water in the system during storage, the agent A containing the modified silicone compound has a surface-treated carbonic acid having a low water content as described above. It is desirable to add calcium.

As the calcium carbonate, a commercially available product such as surface-treated calcium carbonate "Shiraenka CC" or "Homocal D" manufactured by Shiraishi Calcium Co., or untreated calcium carbonate "Whiteon SB" manufactured by Shiraishi Calcium Co., Ltd. is used. You can also.

If the mixing ratio of calcium carbonate is too small, the cohesive force of the cured product will not be sufficiently exhibited, and if it is too large, the workability of the bonding work will be poor and the cured product will not be affected. It is limited to 25 to 100 parts by weight based on 100 parts by weight of the total of the compound, the silanol condensation catalyst and the curing agent for the epoxy resin.

Next, the structure of the agent B will be described.

The epoxy resin, one of the components of the agent B, acts to increase the strength of the cured adhesive. Examples of the epoxy resin include epichlorohydrin-bisphenol A type epoxy resin, epichlorohydrin-bisphenol F type epoxy resin, hydrogenated bisphenol A type epoxy resin, and urethane-modified epoxy resin. However, the epoxy resin that can be used in the composition of the present invention is not limited to the above examples, and generally used epoxy resins can be used. From the viewpoint of reactivity upon curing, it is preferable to use an epoxy resin having a plurality of epoxy groups in one molecule. A commercial product made by Yuka Shell Epoxy Co., Ltd. "Epicoat 82"
8 "can also be used.

The diluent, another component of the agent B, acts as a viscosity modifier. DO as a diluent
Plasticizers such as P, DIDP, and chlorinated paraffin; reactive diluents usually used as diluents for epoxy resins, such as monoglycidyl ether; toluene, methyl cellosolve, ethyl cellosolve, propyl cellosolve, butyl cellosolve, methyl ethyl ketone, alcohol, Examples thereof include a solvent represented by acetone and the like, but are not particularly limited. Of these, ethyl cellosolve is particularly preferred.

If the mixing ratio of the diluent is too small, the effect of adjusting the viscosity cannot be obtained, and if it is too large, the cured product of the adhesive composition for tile floors becomes brittle. Department.

Calcium carbonate, which is another component of the agent B, acts as a thickener and a bulking agent.
It acts as a strength enhancer for the adhesive layer after curing of the tile floor adhesive composition. As the calcium carbonate, the aforementioned A
It is the same as that used for the agent, but in this case, since the change in physical properties due to moisture in the system is small, hydrous calcium carbonate without surface treatment can be preferably used.

If the mixing ratio of calcium carbonate is too small, the cohesive force of the cured product will not be sufficiently exhibited, and if it is too large, the workability of the bonding work will be poor and the cured product will not be affected. 25-10 for 100 parts by weight
It is limited to 0 parts by weight.

Water, which is another component of the agent B, is for accelerating the curing of the modified silicone compound, and general industrial water or the like is used. The mixing ratio of water is 0.5 to 100 parts by weight of the epoxy resin.
Limited to 5 parts by weight. The reason is that if it is less than 0.5 part by weight, the effect of accelerating the curing of the modified silicone compound is low,
Even if the amount exceeds 5 parts by weight, the effect of accelerating the curing of the modified silicone compound is not so much improved, and the thixo index increases, resulting in a decrease in the adhesive area at the time of construction. In addition, depending on the adherend, water hardly remains at the interface between the adhesive and the adherend when it is hardened, the adhesive strength is not sufficiently exhibited, and the destruction state often results in interfacial failure.

In the adhesive composition for tile floors of the present invention, the number of rotations is 10 rpm and the temperature is 20 ° C. using a BH type viscometer.
The viscosities of the A agent and the B agent measured by
000-30000 mPa · s is preferred. The reason is that even if the viscosity after mixing the A agent and the B agent is a viscosity that gives a composition having excellent self-leveling property, if there is a large difference in the viscosity between the A agent and the B agent, the internal This is because the measurement error becomes large when the mixing is performed by the method, and as a result, it is difficult to adjust the mixing ratio to an accurate value.

In the adhesive composition for tile floors of the present invention, the A and B agents each have a Thixo Index of 1.
0 to 5.0 is preferred. In addition, the thixo index refers to (viscosity measured at a rotation speed of 2 rpm and a temperature of 20 ° C.) / (Viscosity measured at a rotation speed of 20 rpm and a temperature of 20 ° C.) using a BH type viscometer. The reason is that even if the composition after mixing the A agent and the B agent has a thixo index of 1.0 to 5.0, there is a large difference in the thixo index of the A agent and the B agent. This is because the measurement error increases when the mixing is performed in the automatic mixing and coating machine, and as a result, it is difficult to adjust the mixing ratio to an accurate value.

In using the adhesive composition for tile floors of the present invention, the cured product becomes softer when the amount of the epoxy resin in the agent B relative to the modified silicone compound in the agent A decreases, and when the amount increases, the cured product becomes hard and brittle. Therefore, it is preferable to use 20 to 100 parts by weight of the epoxy resin in the agent B with respect to 100 parts by weight of the modified silicone compound in the agent A, and to use 30 to 70 parts by weight. More preferred. In particular, it is preferable to use the epoxy resin in the agent B in a ratio of 50 parts by weight to the modified silicone compound in the agent A with respect to 100 parts by weight, since the elongation and strength of the adhesive after curing can be balanced.

(Function) The adhesive composition for a tile floor according to the first aspect of the present invention has a relatively large application amount, such as the adhesion at the time of manufacturing the unit alone, and is applied to a deep portion of the adhesive layer. Provides a cured product with sufficient adhesive strength due to the presence of moisture in the composition even when moisture penetration is difficult, and self-leveling because the composition has appropriate viscosity and thixo index A cured product having good adhesive strength and good adhesive strength can be obtained because the adhesiveness is good and a sufficient adhesive area can be secured.

The adhesive composition for a tile floor according to claim 2 of the present invention has the same action as described above, and the viscosity of the A agent and the B agent is limited. Since the mixing ratio can be adjusted to an accurate value, a cured product having excellent adhesive strength can be stably provided.

The adhesive composition for a tile floor according to claim 3 of the present invention has the same action as the adhesive composition for a tile floor according to claim 1 or 2, and the thixotropic index of the A agent and the B agent. Is limited, so that the mixing ratio can be adjusted to an accurate value at the time of metering and mixing in an automatic mixing / coating machine, so that a cured product having excellent adhesive strength can be stably provided.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention and comparative examples will be described.

Example 1 "Silyl SAX350" manufactured by Kanegafuchi Chemical Industry Co., Ltd. was used as the modified silicone compound, "SB-65" manufactured by Sankyoki Gosei Co., Ltd. was used as the silanol condensation catalyst, and oil was used as a curing agent for the epoxy resin. Ciel's tertiary amine compound "D
MP-30 ", monoglycidyl ether as a diluent, and surface-treated calcium carbonate (" Shiraenka CC "or" Homocal D "manufactured by Shiraishi Calcium Co., Ltd.) as calcium carbonate. Agent A was prepared at the indicated mixing ratio (unit: parts by weight).

On the other hand, "Epicoat 828" manufactured by Yuka Shell Epoxy Co., Ltd. was used as an epoxy resin, ethyl cellosolve was used as a diluent, and untreated calcium carbonate was used as calcium carbonate ("Whiteton S" manufactured by Shiraishi Calcium Co., Ltd.).
B ") and industrial water was used as the water to prepare the B agent in the mixing ratio (unit: parts by weight) shown in Table 1.

Thus, an adhesive composition for tile floors comprising the A agent and the B agent was prepared.

Examples 2 and 3 and Comparative Examples 1 to 4 An adhesive composition was prepared in the same manner as in Example 1 except that the proportions of the components of Agents A and B were changed to the values shown in Table 1. Was prepared. In Comparative Example 3, Agent A was prepared using industrial water at the values shown in Table 1 in addition to the above components.

[0046]

[Table 1]

Performance Test a. Measurement of viscosity 200 g of agent A was placed in a beaker, and the viscosity was measured using a BH type viscometer at a temperature of 20 ± 0.5 ° C. and a rotor No. 7,
The measurement was performed under the condition of a rotation speed of 10 rpm. In addition, agent B 200
g was placed in a beaker and its viscosity was measured in the same manner as above. Further, in Example 1, the agent A: B agent = 128: 81 by weight ratio, and in Example 2, the agent A: B agent:
Agent B = 220: 64; for Example 3, A in weight ratio
Agent: B agent = 140: 112, Comparative Example 1 by weight ratio: Agent A: B agent = 140: 128, Comparative Example 2: Agent A: B agent = 255: 95 by weight ratio, Comparative Example 3 , A agent: B agent = 150: 89 by weight ratio, Comparative Example 4
About 200g of the adhesive obtained by mixing each of the A agent and the B agent in the ratio of A agent: B agent = 140: 125 by weight ratio was placed in a beaker, and the viscosity was measured in the same manner as above. did. The results are shown in Table 2.

B. Measurement of Thixotropic Index 200 g of Agent A was placed in a beaker, and its viscosity was measured using a BH type viscometer at a temperature of 20 ± 0.5 ° C. and a rotor No.
6. The measurement was carried out under the conditions of 2 rpm and 20 rpm. From the obtained measurement values, the thixotropic index (= rotation speed 2 rp)
m / viscosity at 20 rpm). In addition, 200 g of Agent B was placed in a beaker, and its viscosity was measured in the same manner as described above, and the thixotropic index was calculated. Further, a. In the same ratio as described in the section of viscosity measurement, A
200 g of the adhesive obtained by mixing each of Agent B and Agent B were placed in a beaker, and the viscosity was measured in the same manner as above.
The thixo index was calculated. The results are shown in Table 2.

C. As shown in FIG. 1, a 2 mm wide cross 2 was formed at the bottom of a polypropylene cylinder 1 having a diameter of 15 mm as shown in FIG. At the same ratio as the ratio described in the section of viscosity measurement, the adhesive 3 obtained by mixing each of the agent A and the agent B was put into a syringe, and then 2 ml was filled into the test device, and the adhesive was Visually observe the extent of the spread,
The ratio of the spread area of the adhesive to the bottom area of the test device was determined and defined as the bond area ratio. Note that this test was performed in an atmosphere at 20 ° C. The results are shown in Table 2.

D. Storage stability 200 g of Agent A, which had been left in a 20 ° C. atmosphere in advance,
After taking in a 225 ml glass bottle and keeping the internal space in a state where moisture can be shut off by a nitrogen purge, and storing it in an oven at 40 ° C. for 3 months, the viscosity is adjusted to the above-mentioned a.
The viscosity was measured in the same manner as in the viscosity measurement section, and the storage stability was evaluated in two stages according to the following evaluation criteria. In addition, storage stability was evaluated in the same manner for Agent B. The evaluation criteria are as follows. ：: The viscosity increase (viscosity after storage for 3 months / viscosity at the start of storage) is 1.5 or less. X: Thickening exceeded 1.5.

Table 2 shows the evaluation results.

E. Mixing property of adhesive A agent and B agent, which were previously left in a 20 ° C. atmosphere, were mixed in the amount shown below and mixed with a spatula.
g was weighed and further mixed with a spatula, and the mixing difficulty at that time was intuitively evaluated in two stages based on the magnitude of resistance applied to the spatula. The evaluation criteria are as follows. ：: Can be easily mixed. ×: Hard to mix.

The amounts of the A agent and the B agent used in the mixing are 128 g for the A agent and 81 g for the B agent in Example 1;
About 220g of A agent, 64g of B agent; 140g of A agent, 112g of B agent for Example 3; 140g of A agent, 128g of B agent for Comparative Example 1; 255g of A agent, 255g of Comparative Example 2 95 g of agent; for Comparative Example 3,
150 g of Agent A, 89 g of Agent B; 140 g of Agent A and 125 g of Agent B for Comparative Example 4.

Table 2 shows the evaluation results.

F. Surface tensile strength a. The adhesive was prepared by mixing the A agent and the B agent at the same ratio as described in the section of the measurement of the viscosity.
As shown in FIG. 2, the inner diameter of the spacer is 15 mm,
A cylindrical polypropylene frame 5 having an outer diameter of 18 mm and a height of 6 mm is prepared, and this frame 5 is attached to the lower tile 4 in FIG.
a (50 mm × 50 mm), and after filling the frame 5 with the adhesive 3 until it overflows, cover the upper tile 4 b (50 mm × 50 mm) in FIG. The adhesive 3 was sufficiently brought into contact with 4b and the lower tile 4a. Next, after applying an epoxy-based adhesive between the upper tile 4b and the gripper 7, the gripper 7, the upper tile 4b, the polypropylene frame 5, and the lower tile 4a are crimped at 20 ° C. The specimen was cured for 7 days to prepare a test body. The lower tile 4a of the specimen is gripped by the gripper 6, and the grippers 6 and 7 are pulled at a speed of 50 m.
The sheet was pulled in the direction of the arrow at m / min, and the strength kg when the tile was peeled was converted per cm ² to obtain the surface tensile strength. The results are shown in Table 2.

G. Initial adhesive strength development time f. When preparing a test body by the method of the above, except that the curing time at 20 ° C. was changed to 1, 2 and 3 hours instead of curing at 20 ° C. for 7 days, the above f. After preparing a test body in the same manner as in the above method, the above f. A surface tensile strength test was conducted in the same manner as in
The minimum curing time showing a strength exceeding g / cm ² was determined. The results are shown in Table 2.

[0057]

[Table 2]

As is clear from Table 2, when the adhesives of the examples were used, good evaluations were obtained in all the test items.

[0059]

The composition of the adhesive composition for a tile floor according to the first aspect of the present invention is as described above. Since the self-leveling property is good, a sufficient bonding area can be obtained. Adhesive strength is obtained, water is present in agent B, it is fast-curing, and the cured product has rubber-like flexibility and can be adhered to places where moisture is shut off. Therefore, for example, it is useful as an adhesive in the production of a single unit.

The composition of the adhesive composition for a tile floor according to the second aspect of the present invention is as described above, has the same effects as described above, and the viscosity of the A agent and the B agent is limited. Since the mixing ratio can be adjusted to an accurate mixing ratio in the automatic mixing and coating machine, a cured product having excellent adhesive strength can be stably provided.

The composition of the adhesive composition for a tile floor according to the third aspect of the present invention is as described above, and is defined as the first or second aspect.
The same effect as the adhesive composition for tile floor described above is exhibited, and the thixotropic index of the A agent and the B agent is limited, so that the mixing ratio can be adjusted to an accurate mixing ratio in the automatic mixing and applying machine. A cured product having excellent adhesive strength can be stably provided.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a test method of a bonding area ratio.

FIG. 2 is a diagram for explaining a test method of surface tensile strength.

[Explanation of symbols]

 Reference Signs List 1 cylindrical body 2 cross 3 adhesive 4a lower tile 4b upper tile 5 polypropylene frame 6,7 gripper

Claims (3)

[Claims] 1. A diluent of 3 to 20 parts by weight and calcium carbonate 25 per 100 parts by weight of a modified silicone compound having at least one reactive silicon group in one molecule, a silanol condensation catalyst and a curing agent for an epoxy resin. ~
Agent A containing 100 parts by weight, 100 parts by weight of epoxy resin, 3 to 20 parts by weight of diluent, 25 to calcium carbonate
An adhesive composition for tile floors, comprising: B agent containing 100 parts by weight and 0.5 to 5 parts by weight of water. 2. Using a BH type viscometer at a rotation speed of 10 rpm,
The adhesive composition for a tile floor according to claim 1, wherein the viscosity of the agent A and the agent B measured at a temperature of 20 ° C is 10000 to 30000 mPa · s, respectively. 3. The tile floor adhesive composition according to claim 1, wherein the A agent and the B agent each have a thixotropic index of 1.0 to 5.0. However, the thixo index is determined by using a BH type viscometer and (viscosity measured at a rotation speed of 2 rpm and a temperature of 20 ° C.) / (Viscosity measured at a rotation speed of 20 rpm and a temperature of 20 ° C.).