KR101002889B1 - With highly efficient polymer-based tile adhesive, applicable for various types of tiles with less than 1% absorption in damp substrates and waterproof surfaces of dry substrates - Google Patents

Abstract

PURPOSE: A polymer-based tile adhesive is provided to improve elasticity, water resistance, durability and adhesion strength by using VA/VV/E(vinyl acetate, vinyl versatate, ethylene) ternary copolymer re-emulsified powdered resin and HEMC(Hydroxy Ethyl Methyl Cellulose). CONSTITUTION: A polymer-based tile adhesive comprises white portland cement 35-45 weight %, 60-100mesh silica 25-40 weight %, 100-200mesh silica 15-30 weight %, HEMC 0.3-1.5 weight %, cellulose fiber 1-5 weight %, and VA/VV/E(vinyl acetate, vinyl versatate, ethylene) re-emulsified powdered resin 2-10 weight %. The VA/VV/E re-emulsified powdered resin has apparent specific gravity of 400-600 g/L and solid content of 98-100 weight %.

Description

With highly efficient polymer-based tile adhesive, applicable for various types of tiles with less than 1% absorption in damp substrates and waterproof surfaces of dry substrates}

The present invention is a polymer-based high-performance tile adhesive for tile application having a water absorption rate of 1% or less on wet and dry wall waterproof surfaces. Unlike conventional products, VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer reemulsification type By using powder resin and HEMC (Hydroxy Ethyl Methyl Cellulose), it improves elasticity, water resistance, durability, and adhesive strength, so that the water absorption rate is less than 1% on the wet wall and dry wall waterproof surface of high-rise building such as columnar composite building, mall building, and office It is a functional tile adhesive that can be attached to prevent the lifting and falling of tiles.

Initially, methyl cellulose is added to cement and silica sand to improve water retention and viscosity, and adhesive ceramic tile cement is mainly used, but the size of tiles is increased, and EVA reemulsifying powder resin and PVA are added while demanding higher performance. As a special 193 -0009347 enhanced adhesion, a small amount of PVA and fly ash added as a cement substitute to improve the durability, such as special 2002-0009336 added a powder-type adhesive reinforcement to the porcelain tile cement for general adhesion Fortified products have been used.

In addition, as the size of tiles increases, tile adhesives are also advanced, increasing the re-emulsifying powder resin and the amount of thickener added, thereby increasing the adhesive strength and increasing the amount of thickener to prevent large tiles from slipping by their own weight. Products such as registration number 10-0937635 made by adding durable acrylic redispersible powdered resin and calcined lime are used to prevent the lifting and dropping of the polished tile in the ondol structure system and the inside due to the temperature change and the adhesive.

Recently, as the structure of commercial buildings, department stores, malls, offices, etc. has become higher, drywall is being applied to reduce the weight of the structure.In the case of bathrooms, drywall is waterproofed with tar urethane waterproofing material or one-component elastic film waterproofing material. On the waterproof surface, a tile having a water absorption rate of 1% or less, which is excellent in durability and aesthetics, is constructed on the waterproof surface.

However, products in the form of special 2003-0015566 (high performance tile cement), and in the form of registration number 10-0937635 (polishing tile cement adhesive), can be used to install tiles with water absorption of 1% or less on the drywall of high-rise buildings. In this case, the lifting and dropping of the tile is a problem. These main causes are the contraction, expansion, deformation of the drywall and insufficient adhesion performance on the drywall waterproof surface, causing the tiles to be lifted and dropped.

Therefore, in the tile adhesive market, when a tile having a water absorption rate of 1% is applied to the waterproof surface of a high-rise building drywall, there is a great need to develop an excellent adhesive that can prevent the lifting and dropping of tiles.

The present invention has been proposed to improve the above problems in the prior art, in order to prevent the lifting and falling of the tiles having a water absorption of 1% or less in the waterproof surface of the high-rise building dry wall in terms of elasticity, water resistance, durability and waterproof Tiles with absorbance less than 1% in the waterproof surface of high-rise drywall using VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer re-emulsified powder resin and HEMC (Hydroxy Ethyl Methyl Cellulose) Its purpose is to provide polymer-based high-performance tile adhesives for tile applications with absorption of less than 1% on wet and dry wall waterproof surfaces that can prevent lifting and dropping of tiles by improving adhesive strength, elasticity and strain during construction. .

VAE (Vinyl Acetate Ethylen) re-emulsified powder resin and acryl-based re-emulsified powder resin which are generally used are not sufficiently exhibited the adhesive strength, elasticity and strain when water absorption is less than 1%. In the present invention, as described above, a high-layer using VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer reemulsified powder resin and HEMC (Hydroxy Ethyl Methyl Cellulose) having excellent adhesive strength on the waterproof surface We tried to present a polymer-based high-performance tile adhesive for the application of tiles with water absorption of 1% or less on the wet and dry wall waterproof surfaces, which can prevent lifting and dropping, when constructing tiles with water absorption of 1% or less on the waterproof surface of building drywall. .

The present invention has excellent adhesive strength on waterproof surface and excellent elasticity and strain when installing tiles with water absorption of 1% or less on the waterproof surface of high-rise drywall, preventing the lifting and dropping of tiles, thereby improving the quality of tile construction for drywall interior finishing. It is effective to secure.

In order to achieve the above object, the tile adhesive of the present invention is 35 to 45% by weight of white portland cement, 25 to 40% by weight of 60 to 100 mesh silica sand, 15 to 30% by weight of 100 to 200 mesh Silica sand, 0.3-1.5% by weight of Hydroxy Ethyl Methyl Cellulose (HEMC), 1-5% by weight of cellulose fiber, 2-10% by weight of VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer It characterized in that it comprises a re-emulsified powder resin.

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 should not contain foreign substances that can affect the curing of cement. 25 to 40% by weight of 60-100 mesh silica and 15 to 30% by weight of 100-200 mesh silica 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.

HEMC (Hydroxy Ethyl Methyl Cellulose) is added to cement products to show adhesiveness and water retention.As it is less than 0.3% by weight, tile slippage and repair rate decrease due to viscosity decrease, and when it exceeds 1.5% by weight, viscosity increases too much and workability It is not suitable as a tile adhesive. Therefore, HEMC (Hydroxy Ethyl Methyl Cellulose) should be added 0.3 to 1.5% by weight. Hydroxy Ethyl Methyl Cellulose (HEMC) is preferably characterized in that the viscosity of the 2% aqueous solution is 30,000 to 40,000 mPa · s and the particle size of the 250 μm sieve is 90.0% or more.

Hydroxy Propyl Methyl Cellulose (HPMC) and Methyl Ethyl Hyedroxypropyl Ethyl Cellulose (MEHEC) must use HEMC (Hydroxy Ethyl Methyl Cellulose), which has excellent adsorption and adhesive strength on the water-proof side.

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 rapidly, thereby reducing the pot life. Therefore, the mixing ratio of 1 to 5% by weight is appropriate.

Reemulsifying powder resin should be added with cement in an amount of 2 to 10% by weight to provide adhesive strength, flexural strength and elasticity. If it is less than 2% by weight, sufficient adhesive strength and flexural strength cannot be obtained. If it is more than 10% by weight, the slip resistance and the water resistance to adhesion are inferior.

VAE (Vinyl Acetate Ethylen) re-emulsified powder resin and acryl-based re-emulsified powder resin are generally VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer reemulsification type because they have low adhesive strength and strain in waterproof Powder resin should be used.

VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer reemulsified powder resin is a product made by spray-drying a liquid emulsion made by copolymerizing vinyl acetate, vinyl versatate, and ethylene by spray drying.

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 porcelain tile cement made of portland cement, silica sand, methyl cellulose, and the like similar to that of 2002-0009336 was used.

Comparative Example 2

One kind of porcelain tile cement made from Portland cement, silica sand, HPMC, VAE (Vinyl Acetate Ethylen) reemulsified powder resin, and the like, was used.

Comparative Example 3

A product of one kind of porcelain tile cement manufactured from portland cement, silica sand, MEHEC, acrylic reemulsified powder resin, etc., similar to the registration number 10-0937635 was used.

Example

38 weight percent white Portland cement, 33 weight percent 60-100 mesh silica sand, 20.6 weight percent 100-200 mesh silica sand, 0.4 weight percent Hydroxy Ethyl Methyl Cellulose (HEMC), 2 weight percent cellulose fiber, 6 A weight percent VA-VV-E (vinyl acetate, vinyl versatate, ethylene) terpolymer reemulsified powder resin was placed in a mixer in turn and mixed for about 25 minutes.

In order to confirm the effect of the present invention, the characteristics of the polymer-based high-performance tile adhesive for tile application having a water absorption rate of 1% or less on the wet wall and the dry wall waterproof surface manufactured as described above were measured according to the following measurement method. Shown in

[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.

TABLE 1

-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

The powder was sufficiently mixed with water to fill the 200 ml cup of the mixed product and measured on a rotating spindle T-E, BROOKFIELD RVT Viscometer RPM 2.5.

(2) slip resistance

The plate coated with tar urethane waterproofing agent is cut into 9mm thickness CRC board (non-asbestos fiber reinforced cement board) to 500 × 1000mm size, and 5mm angle bar is attached to both ends of short side with epoxy resin adhesive. The surface should be cleaned to prevent dust and other foreign substances from adhering, and use a magnetic tile with an absorption of less than 1% of 300 × 600mm. 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. Then, the serrated trowel is angled at 60 ° and pulled out at once at both speeds to remove the 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 a mortar plate with a size of 70 × 70mm and a thickness of 20mm and a plate coated with tar urethane waterproofing material on a CRC board having a size of 70 × 70mm and a thickness of 9mm. Clean the surface from dust and other foreign matter.

b) magnetic tiles having an absorption of not more than 1%;

Magnetic tiles having an absorptivity of 1% or less are used after cutting to 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

To apply the adhesive to the base material, insert and fix five base plates without gaps on the iron frame of the KS L 1593 with the smooth surface upward, take the appropriate amount of the adhesive and apply it with a serrated trowel. 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, a magnetic tile having a water absorption of 1% or less cut to a size of 40 × 40 mm in advance is placed on the center of the base material on which the adhesive is applied, and 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 is adhered to the tile with epoxy resin-based adhesive, etc. under standard conditions. (When preparing the test body, 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 20 days at 20 ± 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.

Table 2 Comparative Example, Example Product Test Results

As shown in the above results, the polymer-based high-performance tile adhesive agent for applying a tile having a water absorption rate of 1% or less on the wet and dry wall waterproof surfaces of the present invention is coated with a tar urethane waterproofing agent on a mortar board and a CRC board. The standard adhesive strength, thermal aging adhesive strength, adhesive strength after freeze-thawing, and flexural deformation test were superior to Comparative Examples 1, 2 and 3. As a result, it is excellent in slip resistance, standard adhesive strength, thermal aging adhesive strength, adhesive strength after freeze-thawing, and flexural deformation test. It can prevent lifting and dropping to ensure the quality of tile construction for wet and dry wall interior finishing.

Claims (3)

White Portland cement 35-45 wt%, 60-100 mesh silica 25-25 wt%, 100-200 mesh silica sand 15-30 wt%, HEMC (Hydroxy Ethyl Methyl Cellulose) 0.3-1.5 wt%, Cellulose fiber 1- VA-VV-E (vinyl acetate, vinyl versatate, ethylene) with 5% by weight, apparent specific gravity of 400-600 g / L, solid content of 98-100% by weight, and pH value of 7.0-8.0 when dissolved in water at 10% A tile adhesive comprising 2 to 10 wt% of terpolymer copolymer reemulsifying powder resin delete The HEMC (Hydroxy Ethyl Methyl Cellulose) is a tile adhesive, characterized in that the 2% aqueous solution has a viscosity of 30,000 to 40,000 mPa.s and a particle size of 250 μm sieve of 90.0% or more.