KR101010849B1 - Highly efficient two-component tile adhesive with strong points of water resistance and elasticity - Google Patents

Abstract

PURPOSE: A highly efficient two-component tile adhesive is provided to prevent lifting or separation of tiles due to excellent elasticity, water resistance, heat resistance, durability and adhesive strength. CONSTITUTION: A highly efficient two-component tile adhesive includes: filler consisting of white Portland cement, 60-100 mesh silica, 100~200 mesh silica, methyl cellulose, cellulose fiber, vinyl acetate-vinyl versatate-ethylene-butyl acrylate 4-membered copolymer redispersible powder resin, metakaoline, and silane powder; and a binder consisting of methyl cellulose, a mixed resin in which an acrylic synthetic resin and an SBR resin are mixed in a weight ratio of 3:1-3, PH adjusting agent, antiseptic, anti-foaming agent and a dilution solvent.

Description

Highly efficient two-component tile adhesive with strong points of water resistance and elasticity

The present invention is a two-component high-performance tile adhesive with excellent water resistance and elasticity, unlike conventional products, acrylic synthetic resin emulsion, SBR resin, VA-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) Improved elasticity and water resistance, heat resistance, durability, and adhesive strength by using powdered powder resin, metakaolin, and SILANE POWDER, so that the structure deformation, heating, temperature change, and water infiltration in the Jjimjilbang, sauna, swimming pool and public bath And it is a two-component high-performance tile adhesive with excellent water resistance and elasticity that can prevent the lifting and dropping of tiles due to hot water effect.

Recently, when the interior tile finish of the jjimjilbang, sauna, swimming pool, public baths, etc., the polished tiles with aesthetics, color, and design that are superior to existing ceramic and porcelain tiles are used.

However, when the polished tile is applied to a jjimjilbang, sauna, swimming pool, or public bath, the adhesive force is deteriorated due to the deformation of the structure, the change of temperature by heating, the infiltration of water, and the hot water. Therefore, in the tile adhesive market, it is necessary to develop an adhesive having excellent water resistance and elasticity when applying a polishing tile to a jjimjilbang, a sauna, a swimming pool, or a public bath.

The present invention, rather than the tile adhesive such as prior art registration number 10-0942358, registration number 10-0937635 improves the water resistance, heat resistance, elasticity, adhesive strength due to the deformation of the structure, temperature change by heating, moisture infiltration and the effect of hot water It is possible to minimize tile lifting and dropping.

The present invention was developed to meet the above requirements, acrylic synthetic resin emulsion, SBR resin, VA-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) 4 copolymer re-emulsified powder resin, By using metakaolin and SILANE POWDER, it improves elasticity and water resistance, heat resistance, durability, and adhesive strength, so that the structure of polished tile is applied to a sauna, sauna, swimming pool, public bath, temperature change by heating, moisture infiltration and hot water It is an object of the present invention to provide a tile adhesive that can prevent the lifting and dropping of tiles due to the influence.

The present invention is a two-component high-performance tile adhesive with excellent water resistance and elasticity, unlike conventional products, acrylic synthetic resin emulsion, SBR resin, VA-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) Improved elasticity and water resistance, heat resistance, durability, and adhesive strength by using powdered powder resin, metakaolin and SILANE POWDER, so that the structure of polished tiles can be applied to saunas, swimming pools, public baths, etc. The purpose of this study was to propose a two-component high-performance tile adhesive with excellent water resistance and elasticity that can prevent tile lifting and dropping due to the effects of infiltration and hot water.

The present invention is excellent in elasticity and water resistance, heat resistance, durability, and adhesive strength when applying polished tiles to saunas, saunas, swimming pools, public baths, etc., and can prevent tile lifting and dropping. It can minimize the lifting and dropping of tiles during construction, which is effective in securing the quality of tile construction for interior finishing.

In order to achieve the above object, the tile adhesive of the present invention comprises 35 to 45% by weight of white portland cement based on the total composition of the filler; 30 to 45% by weight of 60 to 100 mesh silica sand; 10-25 wt% of 100-200 mesh silica sand; 0.3-1.5 wt% methyl cellulose; 1-5% by weight of cellulose fibers; VA-10-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) tetrapolymer reemulsifying powder resin of 3 to 10% by weight; 1-5% by weight of metakaolin; 35-44% by weight of mixed resin (resin in which acrylic synthetic resin and SBR resin are mixed at a weight percentage ratio of 3: (1 to 3), respectively) with respect to the total composition of the filler and binder composed of 0.2 to 2.5% by weight of SILANE POWDER. ; 0.2-1.0% by weight of methyl cellulose; 0.1 to 0.5% by weight of pH adjusting agent; 0.05 to 0.2 wt% preservative; Antifoaming agent at 0.05 to 0.2% by weight; It is divided into the binder which consists of 55-64 weight% of diluent solvents.

As the white portland cement, one suitable for KS L 5204 may be used. However, when less than 35% by weight is added, the strength drops, and when more than 45% by weight is added, the pot life is shortened.

Silica sand is obtained by pulverizing natural sand, and it should be used that does not contain foreign substances that may affect the curing of cement. 60-100 mesh silica sand is 30-45 wt%, 100-200 mesh silica sand is 10-25 wt% To apply. The tile adhesive may cause slippage of the tile depending on the size of the silica sand, and there is a decrease in strength, so it is important to keep the particle size.

Methylcellulose is a cellulose derivative that is added to fillers to show adhesion and water retention. If it is less than 0.3% by weight, tile slippage and maintenance rate decrease due to a decrease in viscosity, and when it exceeds 1.5% by weight, the viscosity rises too much. This falls off and is not suitable as a tile adhesive. Therefore, methylcellulose should be added 0.3 to 1.5% by weight. In addition, methyl cellulose added to the binder is used to prevent material separation and impart adhesion, and when less than 0.2% by weight, material separation occurs, and when more than 1.0% by weight, mixing workability with the filler is poor. Therefore, methylcellulose added to the binder should be added 0.2 to 1.0% by weight.

Cellulose fibers are added to the present invention to serve to improve crack resistance and tile slip resistance. If less than 1% by weight, cracks or tile slip may occur. If more than 5% by weight, the product becomes rough after mixing and the viscosity rises quickly, thereby reducing the pot life. Therefore, the mixing ratio of 1 to 5% by weight is appropriate.

Re-emulsifying powder resin should be added with cement to 3 ~ 10% by weight as a material to have adhesive strength, flexural strength and elasticity. When less than 3 weight%, sufficient adhesive strength, flexural strength, elasticity, etc. cannot be obtained, and when more than 10 weight%, slip resistance is inferior.

VAE (Vinyl Acetate Ethylen) re-emulsified powder resin and acryl-based re-emulsified powder resin are generally used because they have low water adhesive strength and heat resistance when polishing tiles are applied to steam rooms, saunas, swimming pools and public baths where water resistance and heat resistance are required. VA-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) 4-polymer reemulsified powder resin should be used.

VA-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) 4 copolymer re-emulsified powder resin is spray-dried liquid emulsion made by copolymerizing vinyl acetate, vinyl versatate, ethylene and Butyl Acrylate with spray It is a powdered product.

Metakaolin should be added with 1 to 5% by weight as a material that serves to improve the water-resistant adhesive strength with cement. When less than 1 weight%, sufficient water-resistant adhesive strength cannot be obtained, and when more than 5 weight%, workability is inferior. Metakaolin is filtered through a ＃ 325 mesh sieve, and a product having a sieve residue of less than 1% and an average particle diameter of 1 to 2 µm is applied.

SILANE POWDER should be added with 0.2 ~ 2.5% by weight as a material that plays a role in improving the water-resistance strength together with cement. When less than 0.2 weight%, sufficient water-resistant adhesive strength cannot be obtained, and when more than 2.5 weight%, workability is inferior. SILANE POWDER is applied to products with average particle size of 300㎛ and apparent specific gravity of 600g / L.

Acrylic synthetic resin is a styrene-acrylic copolymer synthetic resin emulsion containing at least 45% by weight of solids. Acrylic monomers include 2-ethylhexyl acrylate (2-EHA), acrylic acid (AA), and methacrylic acid. Resin using any one or more of (methacrylic acid, MAA), methyl methacrylate (MMA) is applied.

The SBR resin may have a solid content of 45% by weight or more, butadiene 75%: styrene 25%, and a rubber component containing 60 to 70%.

Acrylic synthetic resin and SBR resin should be mixed and used in the ratio of 3: (1 ~ 3) respectively. When the acrylic synthetic resin and the SBR resin are less than 3: 1, the tile slipping phenomenon and workability are inferior, and when the acrylic synthetic resin and the SBR resin are smaller than 3: 3, the product is rough, adhesiveness, workability, adhesive strength, and tile slipping also occur.

The pH adjuster uses a strong base such as ammonium hydroxide as the pH of the whole composition.

As the preservative, benzoic acid, salicylic acid, formalin and the like can be used. However, formalin is very irritating to humans and should be avoided if possible. The two-component high-performance tile adhesive with excellent water resistance and elasticity uses natural products to improve the thickening and adhesion. Therefore, when the temperature and humidity are high in summer, it may be deteriorated and deteriorated by microorganisms, so an appropriate amount of preservative must be added.

As the antifoaming agent inhibits foaming, commercially available products such as conventional nonionic oil in water type (O / W) emulsions such as polyether-siloxane copolymers containing hydrophobic silica may be used.

Water is used as the diluting solvent. Water should be used with caution as the viscosity change and performance change are remarkable even with small amounts of water.

Hereinafter will be described in more detail the configuration and effect of the present invention through the examples and experiments of the present invention described above. This embodiment is for illustrating the present invention, but the content of the present invention is not limited thereto.

Comparative Example 1

A product of one kind of ceramic tile cement manufactured from portland cement, silica sand, methyl cellulose, re-emulsified powder resin, and the like, was used.

Comparative Example 2

One kind of porcelain tile cement manufactured from Portland cement, silica sand, methyl cellulose, re-emulsified powder resin, lightweight pilar, etc., similar to the registration number 10-0942358 was used.

Comparative Example 3

A product of one kind of porcelain tile cement manufactured from Portland cement, silica sand, MEHEC, re-emulsified powder resin, calcined lime and the like similar to the registration number 10-0937635 was used.

Example (Preparation of two-component high performance tile adhesive having excellent water resistance and elasticity)

1. Filler

(1) 35 to 45 wt% white portland cement; 30 to 45% by weight of 60 to 100 mesh silica sand; 10-25 wt% of 100-200 mesh silica sand; 0.3-1.5 wt% methyl cellulose; 1-5% by weight of cellulose fibers; VA-10-VV-E-AC (Vinyl Acetate, Vinyl Versatate, Ethylene, Butyl Acrylate) tetrapolymer reemulsifying powder resin of 3 to 10% by weight; 1-5% by weight of metakaolin; 0.2-2.5 wt% of SILANE POWDER is placed in the mixer one by one and mixed for about 20 minutes.

(2) After complete mixing, pack in a container.

2. Binder

(1) 0.2-1.0 wt% methylcellulose and 0.1-0.5 wt% pH regulator are added to a 55-64 wt% dilution solvent and mixed for 5 minutes.

(2) 35 to 44% by weight of mixed resin (resin in which acrylic synthetic resin and SBR resin are mixed in a weight ratio of 3: (1 to 3), respectively), 0.05 to 0.2% by weight of preservative, and 0.05 to 0.2% by weight Add antifoam and mix for 20 minutes.

(3) After complete mixing, pack in a container.

[How to measure]

The measurement method was cited by Korean Industrial Standard KS L 1593, and the test method whose measurement method is not listed in the Korean Industrial Standard was carried out by a common understandable method.

General conditions of the test are as follows.

-The preparation and test conditions of samples and test specimens shall follow the temperature 20 ± 2 ° c and the humidity 60 ± 5% unless otherwise specified.

-Samples and materials used for testing should be left under test conditions for 12 hours before manufacture.

-Adhesive should be used with sufficient stirring when testing.

Materials and tools used for the test are as follows.

-Materials and tools used for the test shall be in accordance with Table 1 below.

-The applicator used for the test is a serrated trowel. However, a serrated trowel may be used as specified by the manufacturer. The thickness shall be 0.8 6 0.2 mm.

-The adhesive surface of the iron strip used for the manufacture of the test specimen shall be 40 × 40mm.

(1) viscosity

Water or liquid resin (binder) was sufficiently mixed with the powder (filler) to fill the 200 ml cup of the mixed product, and was measured with a rotating spindle T-E, BROOKFIELD RVT viscometer RPM 2.5.

1) Comparative Example 1 was mixed in a powder (filler) 100: water (binder) 28 ratio.

2) Comparative Example 2 was mixed in a powder (filler) 100: water (binder) 32 ratio.

3) Comparative Example 3 was mixed in a powder (filler) 100: water (binder) 28 ratio.

4) Example was mixed in a powder (filler) 100: liquid resin (binder) 32 ratio.

(2) slip resistance

A 8mm slat (flexible plate) is cut to a size of 200 × 500mm, and a 5mm angle bar is attached to both ends of the short side with an epoxy resin adhesive. The surface should be clean to prevent dust and other foreign matter from adhering. Use 100mm square polished tiles with 0.2% absorption rate. To apply the adhesive on the base, take an appropriate amount of the adhesive on the base and apply a thickness of about 7 mm to the base using a spatula or the like. The standard comb is then angled at 60 ° and pulled out at once at both speeds to remove any remaining adhesive. The direction of combing is two places parallel and perpendicular to the long side of the base material. Within 5 minutes after the application of the adhesive, the tile is placed on the base material coated with the adhesive, and the weight of 5 kg is placed on the substrate for about 30 seconds. Then, the weight is removed and marked with ink in the center of the test specimen. Stand upright. After 24 hours, the slip length at the baseline is measured with a scale of 0.05 mm or more.

(3) adhesive strength

Adhesive strength test method is as follows.

1) Test material: The test material is as follows.

a) ground material

The base material is mortar plate and 70 × 70mm size and 20mm thickness. Clean the surface to avoid dust and other foreign matter.

b) polishing tiles with an absorption of 0.2% or less

Polishing tiles (hereinafter referred to as tiles) having an absorptivity of 0.2% or less are those cut into a size of 40 × 40 mm in advance.

2) Preparation of test body: The production of test body is as follows.

a) application of adhesive

For the application of adhesive to the base material, insert 5 pieces of base plate without gaps on the flat surface of the iron application frame of KS L 1593 without gaps, take the appropriate amount of adhesive and apply it with a standard comb. When applying the adhesive, attach the tape prescribed in KS A1527 to the base material so that the butterfly covers 7mm, put the appropriate amount of adhesive on it, apply it with a thickness of 7mm with a spatula, etc. It is set up at °, and it is pulled in front of itself at once at both speeds, and the adhesive is evenly applied with 5 substrates. The tape is peeled off slowly after applying the adhesive.

b) tile attachment

In principle, after 5 minutes of application of the adhesive, the polishing tile cut to 40 × 40 mm in size and 0.2% or less of water absorption is placed on the center of the base material on which the adhesive is applied, and then a weight of 1 kg is placed on it for about 30 seconds. , Remove the weight.

c) device of iron strip

6 hours before the test date, the iron strip specified in KS L 1593 shall be adhered to the tile with epoxy resin adhesive or the like under the standard condition. (When preparing the test specimen, the surface of the tile may be roughened with sand paper, etc.)

3) Adhesion Strength Test

a) testing machine

The tester is a tensile tester whose breakdown load is 15-85% of the tester capacity, and the tension rate can be adjusted to 3 mm / min.

b) adhesive strength

After curing the test body, the adhesive strength is installed in the tester using a jig, the tensile test is performed at a tensile speed of 3mm / min, and the maximum load until breaking is recorded and the broken state is recorded. Tensile tests are also done immediately after completion of curing.

c) How to find the adhesive strength

Adhesion strength is calculated by the following equation.

Adhesion strength is expressed by the average value of 5 specimens.

d) broken status record

Observe the broken surface, visually measure the broken area representing the maximum area, and mark the broken area. In addition, test specimens cut at the interface between iron and tile shall be retested according to the number of specimens, and shall be expressed as the average of the five specimens in combination with the previous figures.

4) Test body treatment: Test body treatment is as follows.

a) Standard adhesive strength: Adhesive strength after 28 days curing at 20 ± 2 ° c and 60 ± 5% humidity after tile attachment

b) Adhesion strength after immersion in water: Adhesion strength after immersion in water for 21 days at 50 ± 2 ° c after 7 days curing at temperature 20 ± 2 ° c, humidity 60 ± 5%

c) Thermal aging adhesive strength: After 14 days of curing at temperature 20 ± 2 ° c, humidity 60 ± 5%, the temperature of 70 ± 2 ° c after 14 days curing

d) Adhesion strength after freeze-thawing: After 7 days of curing at temperature 20 ± 2 ° c, humidity 60 ± 5%, temperature 20 ± 2 ° c, soaked in water for 21 days, and then freeze-thawed 25 times.

* Freeze-thawing condition: -15 ± 3 ℃ 2 hours ± 20 minutes, temperature 20 ± 2 ° C, immersed in water for 2 hours ± 20 minutes

(4) Flexural deflection test (ISO 13007: Part 2 / Part 4 Section 4.5)

1) Test apparatus

a) Test machine: The test machine is a machine that can pressurize the test specimen at the rate of 2mm / min.

b) Flow table: The flow table should be prepared to fit 300 × 45 × 3mm specimens.

2) Test body preparation

a) The mold is fixed firmly to the mortar flow table, the sample is filled and filled with the mortar using the vibration 70 times.

b) Carefully lift the mold off the flow table and remove it.

c) Press the mold suitable for the specimen shape on the specimen so that the specimen has a square shape of 300 × 45 × 3mm. Remove excess material from the mold and demold after 48 hours.

3) Condition

a) Demonstrate the specimen, place it in a sealed plastic container and seal it.

b) After curing for 12 days at 23 ± 2 ℃, take out from the plastic bowl and cure for 14 days under conditions of 20 ± 2 ° C and 60 ± 5% humidity.

4) Deformation Measurement

a) After curing, measure the thickness of the three specimens (measure the points divided into four quarters). If the measured value of each point is more than 3 ± 0.1mm from the average value, discard the specimen.

b) Measure the deflection from the starting point in mm by applying the load at the rate of 2mm / min to the middle of the specimen.

c) Measure the strain to 0.1 mm.

(5) Length change rate measurement

The measurement is made in accordance with KSL 1592, Section 7.7.

As shown in the above results, the two-component high performance tile adhesive example having excellent water resistance and elasticity of the present invention was superior to Comparative Examples 1, 2, and 3 in the adhesive strength and bending deformation test. As a result of this measurement, it is possible to prevent the lifting and dropping of tiles due to the deformation of the structure, the change of temperature by heating, the infiltration of water, and the influence of hot water when constructing the polished tile in the sauna, sauna, swimming pool, or public bath.

Claims (3)

35 to 45 wt% white portland cement; 30 to 45% by weight of 60 to 100 mesh silica sand; 10-25 wt% of 100-200 mesh silica sand; 0.3-1.5 wt% methylcellulose; 1-5% by weight of cellulose fibers; 3-10 wt% of VA-VV-E-AC (vinyl acetate, vinyl versatate, ethylene, butyl acrylate) tetrapolymer reemulsified powder resin; 1-5% by weight of metakaolin; 35 to 44% by weight of a filler composed of 0.2 to 2.5% by weight of SILANE POWDER and a mixed resin (resin in which acrylic synthetic resin and SBR resin are mixed in a weight ratio of 3: (1 to 3), respectively); 0.2-1.0 wt% methylcellulose; 0.1 to 0.5% by weight of pH regulator; Preservative 0.05 to 0.2% by weight; Antifoaming agent 0.05-0.2 weight%; Tile adhesive containing a binder comprised from 55 to 64 weight% of dilution solvent. The tile adhesive according to claim 1, wherein the metakaolin is sieved through a # 325 mesh sieve and the sieve residue is less than 1%, and the average particle size is 1 to 2 mu m. The tile adhesive according to claim 1, wherein the SILANE POWDER has an average particle size of 300 µm and an apparent specific gravity of 600 g / L.