KR101030375B1 - 2-component epoxy resin type adhesives for ceramic tiles - Google Patents

Abstract

PURPOSE: A component epoxy resin type adhesive for ceramic tiles is provided to ensure construction of large-sized tile and marble to walls of a residential and commercial complex, shopping district building, and offices through dot adhesion method. CONSTITUTION: A component epoxy resin type adhesive for ceramic tiles comprises a base material part and a hardener part. The base material part comprises 25-40 weight % of epoxy resin, 0.1-0.5 weight % of dispersing agent, 1.0-2.0 weight % of thixo imparting agent, 55-70 weight % of inorganic filler, and 0.5-5 weight % of reactive diluents. The hardener part comprises 11-23 weight % of polyamide hardening resin, 1.2-2.5 weight % of MXDA(meta xylene diamine) hardening resin, 0.1-0.5 weight % of dispersing agent, 3-7 weight % of curing accelerator, 1.0-2.0 weight % of thixo imparting agent, 60-75 weight % of inorganic filler and 1-5 weight % of reactive diluents.

Description

2-component epoxy resin type tile adhesive {2-Component epoxy resin type adhesives for ceramic tiles}

The present invention relates to a two-component epoxy resin-based tile adhesive, which is a two-component type tile adhesive comprising a main portion composed of an epoxy resin, an inorganic filler, a special additive and the like and a hardening agent portion composed of a polyamide- And marble adhesives.

The present invention is based on an epoxy resin, which is excellent in water resistance, durability, and curing speed, and is integrated with the adhered material with a strong penetration force, so that large-sized tiles and marble are adhered to plywoods, And tile and marble adhesives designed to be applied to the surface.

The present invention is a two-component epoxy resin-based tile adhesive that drastically improves the water resistance, heat resistance and curing speed of a conventional tile adhesive, particularly the problem of large weight tile and marble weight, Is an adhesive that can be applied to a substrate.

Currently, widely used adhesives for tiles can be classified into three types, one is organic tile adhesive mainly composed of acrylic and the other is inorganic tile cement mainly composed of Portland cement. Finally, it is a mixed polymer of oil and inorganic based on polymer and cement which are recently developed and used. The environmentally friendly tile adhesive of the registered patent 10-0923758 is an organic tile adhesive mainly composed of an acrylic emulsion, which is excellent in workability as a one-pack type paste but is vulnerable to water resistance, and it takes much time to cure by natural drying method, It is difficult to use for adhered materials, and it can smell the medicine of adhesive for a long time. Therefore, it may interfere with the post-process, and the use site is very limited. In other words, it is a glue that can be used only for small tiles (size 300mm * 600mm or less) with absorption rate of 5% or more on the absorption wall inside the building that can be protected from moisture. Polishing tile Cement-based adhesives such as organic / inorganic hybrid adhesives can be applied to non-absorbent materials. However, there is a possibility that the open time, which is the tile attaching time, is short and the quality of the construction is deteriorated due to mixing of water at the construction site And the environment may be contaminated by the generation of scattering dust upon mixing. In addition, a curing period of at least 7 days is required for curing by hydration reaction, and the occurrence of shrinkage restricts the construction of large tiles. The quick-setting tile adhesive is a mixture of organic and inorganic mixed type curing accelerators such as a lithium carbon salt, curing is fast and cement is a main component, and therefore, it is difficult to construct a large tile due to the problems as in the above-mentioned Patent No. 10-0937635 .

The composition of the adhesive for a two-component type water-soluble epoxy resin-based ceramic tile is an adhesive using an aqueous epoxy as the main material and is an environmentally friendly adhesive excellent in water resistance, heat resistance and curing speed. However, There is a problem that a small amount is used to cause defects in order to reduce the construction cost. Therefore, there is an urgent need to study an adhesive for tiles which is economical, fast curing time, and excellent adhesive strength, and which can apply large tiles and marble to walls.

The present invention has been proposed in order to overcome the problems of the prior art described above. The present invention is applied to a plywood and a wet wall by a large tile and marble stitching method, and by using an epoxy resin to prevent lifting and dropping, Durability and curing speed and it is integrated with the adhered material with strong penetration power and provides the tile and marble adhesive designed to be able to apply large size tiles and marble to the wall of residential buildings, commercial buildings, offices, There is a purpose.

In the tile adhering, mixing of acrylic emulsion resin of one-component type tile adhesive and vinyl acetate ethylen (VAE) type powder resin or acrylic type re-melting type resin and cement of polymer cement is generally used, and long curing time and deformation due to shrinkage Etc., and the construction of large tiles and marble is limited to plywood. Therefore, the two-component type, which allows large-sized tiles and marble to be applied to the walls of residential buildings, commercial buildings, offices, etc. by integrating the adhesive and the adhered material by mainly using epoxy with high hardening time, high strength and high permeability, Epoxy resin tile adhesive.

The present invention is applied to plywoods and wet walls of residential buildings, commercial buildings, offices, etc. by using large-scale tiles and marble grafting method, and is excellent in water resistance, durability and curing speed. It is effective to prevent the slip and fall-off phenomenon and to secure the quality of tile construction for drywall interior finishing.

In order to attain the above object, the present invention is characterized in that the present invention is divided into a main part to which various additives and an inorganic filler are added to an epoxy resin, and a curing agent part in which various additives and an inorganic filler are mixed with a polyamine curing resin, 1: the hardener part 1, and the main part and the hardener part are described in detail as follows.

(1) Topic section

, An epoxy resin in an amount of 25 to 40 wt%, a dispersant in an amount of 0.1 to 0.5 wt%, an epoxy resin in an amount of 1.0 to 2.0 wt%, an inorganic filler in an amount of 55 to 70 wt%, a reactive diluent in an amount of 0.5 to 5 wt%

(2)

A polyamide cured resin of 11 to 23 wt%, an MXDA (meta xylene diamine) cured resin of 1.2 to 2.5 wt%, a dispersant of 0.1 to 0.5 wt%, a curing accelerator of 3 to 7 wt%, a curing accelerator of 1.0 to 2.0 wt% 60 to 75% by weight of an inorganic filler filler, 1 to 5% by weight of a reactive diluent

Epoxy resin is Bis-Phenol A type epoxy resin, and a solventless epoxy resin equivalent to 160-280 g / eq is used.

The dispersing agent uses an unsaturated fatty acid polyamine dispersant having a function of atomizing the inorganic filler in the resin and having good compatibility with the resin.

As the additive which improves the workability of the composition, the silicone resin additive is mixed with bentonite at a ratio of 2: 1 to increase the viscosity and thixotropy of the composition to prevent sagging when the tile is bonded. The leveling property of the adhesive and the workability are influenced by the addition amount. Therefore, attention should be paid to the usage amount.

The inorganic filler filler is calcium carbonate. The calcium carbonate is composed of light calcium carbonate having an average particle size of 0.8 to 3.0 占 퐉, heavy calcium carbonate having an average particle size of 0.1 to 1.0 占 퐉 and colloidal calcium carbonate having an average particle size of 0.03 to 0.08 占 퐉, The ratio of light calcium carbonate: heavy calcium carbonate: gypsum calcium carbonate was 6 ~ 8: 1 ~ 2: 1 ~ 2 in order to secure construction workability and storage stability. If the ratio is changed, sagging will occur and the workability will be lowered. In addition, the composition ratio of the main part and the hardening agent part is deteriorated. Heavy calcium carbonate and colloidal calcium carbonate should be synthetic calcium carbonate coated with a particle surface.

As the reaction casting stone, benzyl alcohol was used as an alcohol - based reactive diluent which is highly compatible with epoxy resin. When diluting solvent is used, dilution solvent of low boiling point lowers boiling point and volatility is large. When it is applied, it smells much, and workability is greatly changed over time.

As the cured resin, the ratio of polyamide cured resin and MXDA (meta xylene diamine) resin should be mixed at a ratio of 9: 1 to 8.5: 1.5 in order to exhibit high adhesive strength after curing. If they are used in excess of the above ratios, the curing rate may be too fast or delayed, which may lead to a significant difference in workability and adhesive strength, which may cause problems in tile construction.

Dispersing agents, wetting agents and reactive diluents are also used for the hardener, which is the same as the dispersant and the wetting agent applied to the main part.

The curing accelerator serves to adjust the curing rate of the composition comprising the main part: the curing agent part, and the curing accelerator of the tertiary amine should be applied at 3 to 7 wt% in accordance with the temperature change and the season.

The inorganic filling filler in the hardener part uses the same hard calcium carbonate, heavy calcium carbonate and colloidal calcium carbonate as the main part. Since the viscosity and the fluidity of the main part and the resin are different, the hard calcium carbonate: heavy carbonic acid Calcium: The ratio of calcium carbonate to calcium should be in the ratio of 5 ~ 7: 1 ~ 2: 2-3.

Hereinafter, the composition and effect of the present invention will be described in more detail through examples and comparative examples. The present invention is not limited thereto.

Comparative Example 1 was a tile adhesive of S, which is the most common acrylic emulsion type product, and Example 2 was a cementitious tile adhesive of S, in which a redistribution resin was mixed. In the examples, the subject was 35.0 wt% epoxy resin, 0.5 By weight of a dispersant, 0.7% by weight of a filler, 60.0% by weight of an inorganic filler, 3.5% by weight of a reactive diluent, 17.5% by weight of a curing resin, 0.5% 1.0 wt.% Of the pilling agent, 70.0 wt.% Of the inorganic filler, and 4.5 wt.% Of the reactive diluent.

In order to confirm the effect of the present invention, the characteristics of the two-part epoxy resin adhesive thus prepared were measured according to the following measuring methods, and the results are shown in the table.

[How to measure]

The measurement method is cited based on KS L 1593 in the Korean Industrial Standard, and the test method which does not show the measuring method in the Korean Industrial Standard was carried out in a normal understandable manner.

The general conditions of the test are as follows.

- The specimen and specimen preparation and test conditions shall be followed by a temperature of 20 ± 2 ° C and a humidity of 60 ± 5% unless otherwise specified.

- The material used for the test shall be left in the test conditions for 24 hours before the preparation.

- The base and the curing agent should be used in a homogeneous state before the test.

Materials and equipment used in the tests are as follows.

- Materials and equipment used for the tests are shown in Table 1 below.

[Table 1]

- The bonding surface of the iron pieces used in the production of the test specimen shall be 40 × 40 mm.

The mixing of the comparative example and the example is carried out in the following manner.

- Comparative Example 1 is a one-pack product, so it is used without mixing.

- For Comparative Example 2, add the required amount of water according to the description of the product and mix according to KS L 1592 7.3.4 Mortar mixed dough.

- In Examples, weigh the base and curing agent at a mixing ratio of 1: 1, and mix thoroughly using a stirrer.

1) Easy confirmation of termination of kneading

The base and the curing agent are sampled on a glass plate having a size of about 300 mm × 300 mm and a thickness of about 3 mm at a ratio indicated by the manufacturer so that the total amount is about 200 to 300 g and kneaded for about 3 minutes so as to be sufficiently uniform with a spatula. Confirm that the kneading is complete and the color is clear (KS L 1593)

2) Adhesive strength

The adhesive strength test method is as follows.

(1) Test materials

① Base material

The base material is made of mortar plate, size 70X70mm and thickness 20mm.

Clean the surface to prevent dust and other foreign matter from adhering.

② Tiles and marble

Tiles and marble are cut in advance to a size of 40 x 40 mm.

(2) Production of test specimen

① Application of adhesive

Comparative Examples 1 and 2

To apply the adhesive to the backing material, place 5 sheets of the backing board on the flat surface of KS L 1593 with the flat surface facing up, insert it with no gaps, apply an appropriate amount of adhesive and take a standard comb. When applying the adhesive, apply a tape specified in KS A 1527 to the base material so as to cover 7 mm of the butterfly, place an appropriate amount of adhesive, apply it with a thickness of 7 mm using a spatula or the like, And pulled forward with both hands at once to apply the adhesive uniformly to the five base materials. The tape is slowly peeled off immediately after application of the adhesive.

Example

Applying the adhesive to the base material is done by inserting 5 sheets of base plate into the auxiliary frame of KS L 1593 with the smooth surface facing up without any gap and do not apply it separately.

② Attaching tiles

Comparative Examples 1 and 2

In principle, after 5 minutes, the tiles and marbles cut in size of 40 × 40 mm were put on the center of the base material coated with glue, and a weight of 1 kg was placed on the backing for 30 seconds before removing the weight Cures for 1 day, 3 days, 7 days.

Example

5 g of glue was spotted on the tiles and marbles cut in size of 40 × 40 mm in advance and placed immediately on the center of the base material. The weight of 1 kg was placed on the tiles for about 30 seconds, and then the weight was removed. Cure for 7 days a day.

③ Equipment of iron

Between 4 and 6 days of curing, the iron pieces specified in KS L 1593 should be adhered to the tiles with an epoxy resin adhesive or the like in the standard condition. (When preparing the test specimen, it is recommended to rough the surface of the tile with sandpaper etc.)

(3) Treatment of test body: The treatment of the test body is as follows.

① Hot water immersion

After cryogenic curing, cure in a constant-temperature water bath according to Table 2 below.

② Drying · submerged in water repeatedly

After curing at low temperature, cure according to Table 2 below. Drying is carried out in a constant temperature and humidity chamber and immersed in water.

③ Drying / wetting recurrence

After curing, cure in accordance with Table 2 below and dry in a greenhouse. The wetting is carried out in a constant temperature and humidity chamber.

④ Alkaline immersion in water

After standard curing, cure according to Table 2 below. It is immersed in a calcium hydroxide saturated solution.

⑤ Heat aging

After standard curing, cure in a greenhouse according to Table 2 below.

⑥ Low Temperature Curing

After curing at low temperature, cure in a greenhouse according to Table 2 below.

(4) Bond strength test

① Tester

The tester is a tensile tester in which the breaking load can be in the range of 15 to 85% of the tester capacity, and the tensile speed can be adjusted to 3 mm / min.

② Adhesive strength

After curing the specimen, the adhesive strength is measured by using a jig. The tensile test is carried out at a tensile speed of 3 mm / min. The maximum load until breakage is measured and the broken state is recorded. The tensile test shall be carried out immediately after curing. However, the test specimens which have been subjected to curing of dry and wet repeated curing and heat aging are left to stand for 24 hours in a standard state.

③ How to obtain adhesive strength

The adhesive strength is determined according to the following formula.

The adhesive strength is expressed as the average value of 5 specimens.

④ Broken state record

The broken face is observed and the broken position indicating the maximum area is visually measured and the broken position is displayed. In addition, for specimens cut off at the interface between tiles and steel, a retest is to be carried out according to the number of specimens and the average value of the five specimens combined with the above values (KS L 1593)

[Table 3] Comparative Example, Example Product Test Result

As shown in the above results, the performance of the example was superior to that of the comparative example 1 and the comparative example 2 in terms of the adhesive strength and the breakage type test items. Especially, the adhesive strength at the initial stage of construction is very good.

Claims (3)

The subject part has a composition of 25 to 40% by weight of an epoxy resin, 0.1 to 0.5% by weight of a dispersant, 1.0 to 2.0% by weight of a roughening agent, 55 to 70% by weight of an inorganic filler filler, and 0.5 to 5% by weight of a reactive diluent , The curing agent part comprises 11 to 23 wt% of a polyamide cured resin, 1.2 to 2.5 wt% of an MXDA (meta xylene diamine) cured resin, 0.1 to 0.5 wt% of a dispersant, 3 to 7 wt% of a curing accelerator, % Filler, 60-75 wt% inorganic filler, 1 ~ 5 wt% reactive diluent, and a tile and marble adhesive Wherein the curing resin applied to the curing agent part is composed of a polyamide cured resin and an MXDA (meta xylene diamine) resin and the mixing ratio thereof is in a range of 9: 1 to 8.5: 1.5. The inorganic filler applied to the topical part is composed of light calcium carbonate having an average particle size of 0.8 to 3.0 占 퐉, heavy calcium carbonate having an average particle size of 0.1 to 1.0 占 퐉 and colloidal synthetic calcium carbonate having an average particle size of 0.03 to 0.08 占Wherein the mixing ratio of the tile and the marble is 6: 8 to 1: 2: 1 to 2, and the mixing ratio of the hardener is 5: 7: 1 to 2: 2 to 3.