KR102537216B1 - Water soluble epoxy crete and floor construction method using the same - Google Patents

Abstract

The present invention relates to a water-soluble epoxy crete and a floor construction method using the same.
The water-soluble epoxy crete according to one embodiment of the technical idea of the present invention includes a subject, a curing agent mixed with the subject to control the curing rate, and a powder mixed with the subject and the hardener, 0.5 to 1.5 parts by weight of the subject , 2 to 4 parts by weight of the curing agent and 17 to 21 parts by weight of the powder.
With the above configuration, the floor construction method using water-soluble epoxy crete according to various embodiments of the technical idea of the present invention includes water-soluble epoxy crete as a main component to construct the floor surface, thereby cracking, denting, and cracking the concrete floor surface. It does not require maintenance, reinforces the strength of the coating film, can be installed on a humid floor surface, and blocks moisture penetrating from the floor surface to prevent lifting or damage to the coating film.

Description

Water-soluble epoxy crete and floor construction method using the same {WATER SOLUBLE EPOXY CRETE AND FLOOR CONSTRUCTION METHOD USING THE SAME}

The present invention relates to a water-soluble epoxy crete and a floor construction method using the same, and more particularly, by constructing a floor surface containing water-soluble epoxy crete as a main component, there is no need to repair cracks, dents, or cracks on a concrete floor surface, and the coating film strength It relates to a water-soluble epoxy crete that can be applied to a humid floor surface and can prevent moisture penetrating from the floor surface to prevent lifting or damage to the coating film and a floor construction method using the same.

In general, concrete has good compressive strength, acid resistance, alkali resistance, chemical resistance, and UV resistance, but as the period of use elapses, the strength decreases due to substances containing impurities such as acid / alkali and organic matter, Micro-cracks irregularly generated during curing, poor work at joints, and cracks caused by external forces cause leakage, and when corrosion intensifies, even buried rebars are corroded, severely deteriorating the durability of the structure, thereby reducing the function of the concrete structure. There is a problem that damages the .

Accordingly, conventionally, a method of waterproofing and/or anticorrosive concrete by applying a resin material such as epoxy or urethane to the concrete surface to form a protective film is known, and recently polyurea waterproofing method of painting polyurea resin is widely spread. .

The polyurea is generally a resin produced by a chain reaction of an isocyanate prepolymer and an amine, and has a wide range of applications because it has a faster drying time and exhibits excellent physical properties compared to conventional epoxies or urethanes. For example, the polyurea is used for surface protection or flooring for chemical tanks, pipes, pipes, steel pipes, various reinforcing bars or concrete structures, ships, chemical plants, oil refineries, power plants, water treatment facilities, and the like.

In general, polyurea resins are excellent in rust prevention and chemical resistance, so they form elastic and smooth films, and by adjusting the spray angle, embossing can be formed on the surface to promote anti-slip and aesthetic functions, and their reactivity and curing speed are very high. It has the advantage of being fast and has been widely used for the purpose of forming waterproof layers and flooring materials.

However, when the polyurea resin is directly sprayed on the concrete, the watertightness of the concrete is poor, resulting in pinholes and an uneven surface. Therefore, in order to overcome the problem of pinholes, non-woven fabrics or asphalt sheets before application of the polyurea resin are applied. A method of paving has been tried, but this process is also cumbersome, and in the case of rooftop waterproofing, there is a problem in that walking comfort is not good due to non-woven fabric or asphalt sheets.

In addition, when the waterproof layer is reinforced with nonwoven fabric, the surface of the nonwoven fabric may be raised and rough due to the coating material provided on the nonwoven fabric, and the moisture of the coating material or paint is quickly absorbed into the nonwoven fabric, resulting in poor workability, and the physical properties of the nonwoven fabric itself Since it is difficult to form a hole through which the provided coating material passes, it is impossible to form an insulating or partially insulated waterproof structure, so that the response to the behavior of the matrix is poor and the ability to respond to cracks or moisture of the matrix is poor.

In the case of conventional polyurethane, polyurea, or epoxy waterproof flooring, when cracks occur on the substrate surface, the cracks are repaired or repaired with putty or sealant before construction, and pinholes, bubbles, and swelling due to pores in the concrete substrate surface In order to prevent it, a separate primer coating (scraping) was carried out in addition to the undercoat.

However, in the case of this conventional floor construction method, in the case of the wet surface, only a water content of 8% or less was recommended. There was a problem in that an air vent had to be installed separately to prevent swelling of the coating film after the passage of time.

Therefore, it is not necessary to repair cracks, dents, or cracks on the concrete floor surface, and the strength of the coating film is reinforced, and the adhesive strength with the concrete floor surface is increased to prevent lifting or damage of the coating film even on a humid floor surface. development is urgently needed.

Domestic Patent No. 10-2046781 (registered on November 14, 2019) Domestic Patent No. 10-1267433 (Registered on May 20, 2013) Domestic Patent No. 10-1391407 (registered on April 25, 2014)

The problem to be solved by the present invention is that by constructing the floor surface with water-soluble epoxy crete as a main component, it is not necessary to repair cracks, dents, and cracks on the concrete floor surface, reinforces the strength of the coating film, and can be installed even on a humid floor surface. In addition, it is to provide a water-soluble epoxy crete and a floor construction method using the same that can prevent lifting or damage to the coating film by blocking moisture penetrating from the floor surface.

In addition, another problem to be solved by the present invention is that it can function as a flooring material or waterproofing material together with crack repair by simply applying water-soluble epoxy crete without crack repair, and it is possible to reduce time and cost associated with flooring construction. It is to provide a water-soluble epoxy crete and a floor construction method using the same.

Various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In one embodiment of the technical idea of the present invention, a water-soluble epoxy crete is disclosed.

The water-soluble epoxy crete includes a main agent, a curing agent mixed with the main subject to control the curing rate, and a powder mixed with the main subject and the curing agent, including 0.5 to 1.5 parts by weight of the main subject, 2 to 4 parts by weight of the curing agent, and powder 17 to 21 parts by weight.

In addition, in another embodiment of the technical idea of the present invention, a floor construction method using water-soluble epoxy crete is disclosed.

Details of other embodiments are included in the detailed description.

The floor construction method using water-soluble epoxy crete according to various embodiments of the technical idea of the present invention includes water-soluble epoxy crete as a main component to construct the floor surface, thereby eliminating the need for cracks, dents, and crack repair on the concrete floor surface, and the coating film It reinforces the strength and can be installed even on a humid floor surface. It also blocks moisture penetrating from the floor surface to prevent lifting or damage to the coating film.

In addition, the floor construction method using water-soluble epoxy crete according to various embodiments of the technical idea of the present invention can perform a function as a flooring material or waterproofing material with crack repair only by applying water-soluble epoxy crete without crack repair, You can save time and money for flooring installation.

It will be fully understood that embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

The advantages and features of the present invention, and how to achieve them, will become clear with reference to the detailed description of the embodiments below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in ideal or excessively formal meanings. don't

Hereinafter, a preferred embodiment of the water-soluble epoxy crete according to an embodiment of the technical idea of the present invention will be described in detail.

The water-soluble epoxy crete according to one embodiment of the technical idea of the present invention is composed of a moisture-friendly composition, so that it can be applied to a floor surface that is not completely cured or has high humidity after cement mortar construction, and can be applied from the bottom surface. It can block the penetrating moisture to prevent lifting or damage of the coating film.

In addition, the water-soluble epoxy crete according to one embodiment of the technical idea of the present invention blocks moisture on the concrete floor where moisture continuously flows in, enabling subsequent painting. By forming a dense molecular structure that prevents water from penetrating any further through chemical bonding in the coating film, it is possible to prevent coating film defects such as lifting, peeling, and hardness reduction of the coating film.

A water-soluble epoxy crete according to an embodiment of the technical idea of the present invention includes a subject, a curing agent mixed with the subject to control the curing speed, and a powder mixed with the subject to reinforce the physical properties of the epoxy crete.

In addition, the water-soluble epoxy crete may be included in a weight ratio of 0.5 to 1.5 parts by weight of the main agent, 2 to 4 parts by weight of the curing agent, and 17 to 21 parts by weight of the powder.

The subject may consist of bisphenol A type epoxy resin, bisphenol F type epoxy resin, dodecyl phenol, alkyl glycidyl ether and water.

In addition, the subject is bisphenol A type epoxy resin 20 to 30 parts by weight, bisphenol F type epoxy resin 20 to 30 parts by weight, dodecyl phenol (Dodecyl phenol) 1 to 5 parts by weight, alkyl glycidyl ether (Alkyl glycidyl ether) It may be included in a weight ratio of 1 to 10 parts by weight and 30 to 40 parts by weight of water.

The bisphenol A type epoxy resin may be a bisphenol A diglycidyl ether (Diglycidyl Ether of Bisphenol A) epoxy resin, and the bisphenol A diglycidyl ether (Diglycidyl Ether of Bisphenol A) epoxy resin is generally the following [ Formula 1] refers to an epoxy prepolymer having a structure.

[Formula 1]

In [Formula 1], n is a positive number in the range of 1 to 25, and the softening point of the epoxy is determined according to the size of n.

The epoxy prepolymer that can be used as the bisphenol A diglycidyl ether epoxy resin is any epoxy commonly used in the art and is not particularly limited. For example, the bisphenol A diglycidyl ether epoxy resin Examples include Henkel Japan's E-20 (601) and Kukdo Chemical's YD-128.

The bisphenol A diglycidyl ether epoxy resin has wet curing properties and can improve adhesion, strength and durability with a wet floor surface. The bisphenol A diglycidyl ether epoxy resin has an equivalent weight of 180 to 220 (g /eq), viscosity 8,000 ~ 15,000 (cps, at 25 ℃) can be used.

The bisphenol F-type epoxy resin is a resin having H instead of CH ₃ in the molecule of the bisphenol A-type epoxy resin, and has lower viscosity, excellent plasticity, and high reactivity compared to bisphenol A-type epoxy resin. In order to improve heat resistance and mechanical properties as an electrical and electronic material, high filling of fillers is being directed, and low-viscosity epoxy resins have been disclosed. As the low-viscosity epoxy resins, bisphenol F-type epoxy resins are widely known.

The bisphenol F-type epoxy resin may have an epoxy equivalent of 160 to 180 (g / eq), a viscosity of 2,500 to 4,500 (cps, at 25 ° C), and a molecular weight (Mw) of 500 to 1,500, and the bisphenol F-type epoxy resin A bisphenol F-type epoxy resin having a structure of [Chemical Formula 2] below may be used.

[Formula 2]

In [Formula 2], n is a positive number in the range of 1 to 10, and, for example, the bisphenol F-type epoxy resin is YDF-720 (product name) of Kukdo Chemical Co., Ltd. or SEF-170 of Shina TNC Co., Ltd. there is

The dodecyl phenol (Dodecyl phenol) can perform the role of a plasticizer (可塑劑, plasticizer, plasticiser) and control the curing speed.

The dodecyl phenol may be included in a weight ratio of 1 to 5 parts by weight of the total content of the main material. When the dodecyl phenol is included in less than 1 part by weight, the impact resistance of the water-soluble epoxy crete may be deteriorated, and in excess of 5 parts by weight If it is included, the coating film hardness is lowered, and the surface of the coating film floats after drying the coating film, which may cause clouding of the coating film.

The alkyl glycidyl ether (Alkyl glycidyl ether) can lower the viscosity of bisphenol A-type epoxy resin and bisphenol F-type epoxy resin as a reaction (reaction with a curing agent) diluent. For example, the alkyl glycidyl ether As (Alkyl glycidyl ether), C ₁₀ ~ C ₁₄ Alkyl glycidyl ether may be used.

The water may be included to uniformly disperse the composition included in the main ingredient and control the viscosity, and the water may be included in a weight ratio of 30 to 40 parts by weight in the total content of the main subject.

The curing agent may be mixed with the main agent to control the curing rate. The curing agent is isophorone diamine (5-Amino-1,3,3-trimethylcyclohexanemethyl amine), 1,3-bis (aminomethyl) benzene (1,3 -bis(Aminomethyl)Benzene) and water.

In addition, the curing agent isophorone diamine (5-Amino-1,3,3-trimethylcyclohexanemethyl amine) 40 to 50 parts by weight, 1,3-bis (aminomethyl) benzene (1,3-bis (Aminomethyl) Benzene) 30 to 40 parts by weight and 30 to 40 parts by weight of water.

The isophorone diamine (5-Amino-1,3,3-trimethylcyclohexanemethyl amine) is a curing agent for epoxy paints, and is a modified alicyclic amine that has low viscosity and is used to improve workability. In particular, it reacts with epoxy resin to form a coating film with excellent gloss, has excellent gloss stability, is strong against chemical components such as acid and alkali, and is widely applied to places requiring chemical resistance, and has excellent physical and mechanical performance.

The 1,3-bis (aminomethyl) benzene (1,3-bis (Aminomethyl) Benzene) has a fast curing speed and can prevent whitening (whitening).

In addition, the 1,3-bis (aminomethyl) benzene (1,3-bis (Aminomethyl) Benzene) can express excellent adhesion without dissolving without removing the existing painted floor or damaging the existing coating film. It can prevent the lifting and peeling of the coating film.

The water may be included to uniformly disperse the composition included in the curing agent and adjust the viscosity, and the water may be included in a weight ratio of 30 to 40 parts by weight of the total content of the curing agent.

The powder may be mixed with the main material to reinforce the physical properties of epoxy crete, and the powder may be composed of silicon dioxide (SiO ₂ ), Portland cement, and a modified polycarboxylic ether-based additive.

In addition, the powder may be included in a weight ratio of 40 to 50 parts by weight of silicon dioxide (SiO ₂ ), 30 to 40 parts by weight of Portland cement, and 1 to 5 parts by weight of a modified polycarboxylic ether-based additive.

The silicon dioxide (SiO ₂ ) is a stable insoluble oxide and can be used for viscosity control and strength improvement. The silicon dioxide serves to increase resistance to temperature and humidity changes by lowering thermal conductivity and reducing temperature deviation. can do.

In addition, the silicon dioxide can improve shrinkage crack control of the epoxy crete and concrete floor surface, and improve the properties of the concrete floor surface as a shrinkage reducing composition, such as strength, watertightness, and salt damage resistance.

In the present invention, the silicon dioxide has an average particle size of 60 to 80 mesh, a whiteness of 80 to 87%, a fineness of 3,000 to 3,500 cm ² /g, and a density of 2.6 to 2.7 g/cm ³ , It is preferable to use a purity of 92% or more. When the physical properties of the silicon dioxide are out of the above range, problems such as workability, moldability, and compressive strength may deteriorate.

In addition, the silicon dioxide may be included in a weight ratio of 40 to 50 parts by weight of the total content of the powder. When the silicon dioxide is included in less than 40 parts by weight, the viscosity of the slurry is lowered so that material separation is easy to occur and a sufficient increase in workability is expected A problem that is difficult to do may occur, and when it is included in an amount exceeding 50 parts by weight, the strength improvement effect during curing may be reduced and workability may be deteriorated.

The Portland cement is a calcium silicate compound such as tricalcium silicate (Alite, C ₃ S), dicalcium silicate (Belite, C ₂ S), tricalcium aluminate (aluminate phase, C ₃ A), tetracalcium iron aluminate ( It is composed of interstitial phase compounds such as ferrite phase and C ₄ AF) and various slags, and for example, one type of ordinary Portland cement commonly used in the art may be used.

In the present invention, the Portland cement has a strength of 40 N / mm ² or more (28 days), a fineness of 3000 cm ² / g or more, a whiteness of 89 or more, FeO ₃ 0.5% or less, MgO 5.0% or less. it is desirable

The polycarboxylate ether (Modified Polycarboxylic ether)-based additive may function as an admixture or a kind of dispersant, and may reduce a water ratio and maintain appropriate strength without losing workability. In addition, the polycarboxylate ether (Modified Polycarboxylic ether) can prevent quality deterioration such as quality change and slump loss due to the delay in the delivery time of epoxy crete to the casting site and the waiting time at the site. Therefore, it is possible to effectively prevent the deterioration of work efficiency.

For example, the polycarboxylate ether (Modified Polycarboxylic ether)-based additive may use a known material commercially available as a concrete admixture, or a modified polycarboxylic ether-based additive prepared as follows may be used. can

Manufacture of polycarboxylate ether (Modified Polycarboxylic ether)-based additives

CH ₂ =C(CH ₃ )-CH ₂ -(CH ₂ CH ₂ O) ₅₃ -H (weight average molecular weight: 2,400) 0.2 mol, CH ₃ -O-(C=O)-(CH ₂ ) ₁₀ CH ₃ 0.2 mol and LiOH as a catalyst were put in a reactor equipped with a stirrer and a thermometer and heated at 100-120 ° C for 7 hours to form a polycarboxylate ether-based additive monomer (CH ₂ =C(CH ₃ )-CH ₂ -( CH ₂ CH ₂ O) ₅₃ -(C=O)-(CH ₂ ) ₁₀ CH ₃ ) 465 g (yield: 89%) was obtained. 81 parts by weight of the monomer for forming the polycarboxylate ether-based additive, 14.7 parts by weight of acrylic acid, 5 parts by weight of ethyl 2-hydroxyacrylate, 0.3 parts by weight of 2-mercaptoethanol as a chain transfer agent and t-amyl fur as a polymerization initiator 1.2 parts by weight of oxy-2-ethylhexanoate was gradually added dropwise and stirred at 95°C for 6 hours. After the reaction was completed, the temperature was cooled to 60 ° C., and then the pH was adjusted to 4.5 by adding caustic soda under the atmosphere to obtain 802 g of polycarboxylate ether-based additive, 50% solid content (yield: 90%, weight average molecular weight (MW)) : 34,000, viscosity: 400±50cps).

Hereinafter, an example of a floor construction method using water-soluble epoxy crete according to an embodiment of the technical idea of the present invention will be described in more detail.

< Example; Preparation of Water Soluble Epoxy Crete >

A water-soluble epoxy crete was prepared by mixing 1 part by weight of the main material, 3 parts by weight of the curing agent, and 19 parts by weight of the powder.

At this time, the subject is bisphenol A type epoxy resin 25 parts by weight, bisphenol F type epoxy resin 25 parts by weight, dodecyl phenol (Dodecyl phenol) 3 parts by weight, alkyl glycidyl ether (Alkyl glycidyl ether) 5 parts by weight and 35 parts by weight of water It was prepared by mixing in a weight ratio of parts by weight.

In addition, the curing agent is isophorone diamine (5-Amino-1,3,3-trimethylcyclohexanemethyl amine) 45 parts by weight, 1,3-bis (aminomethyl) benzene (1,3-bis (Aminomethyl) Benzene) 35 parts by weight And it was prepared by mixing in a weight ratio of 35 parts by weight of water.

In addition, the powder was prepared by mixing 45 parts by weight of silicon dioxide (SiO ₂ ), 35 parts by weight of Portland cement, and 3 parts by weight of a modified polycarboxylic ether additive.

<Production Example>

Coating was performed in the order and film thickness as shown in [Table 1] to [Table 3] below.

1. Epoxy coating method

division Epoxy Lining Coating thickness (㎛) Epoxy coating Coating thickness (㎛) city
s
tem Primary
Secondary
tertiary Epoxy
Epoxy Crete
Epoxy Lining 50
1,000 to 3,000
1,000 to 3,000 Epoxy
Epoxy Crete
Epoxy coating 50
1,000 to 3,000
50 to 300

* Epoxy lining properties: Satisfies KSF 4937

2. Urethane coating method

division Urethane waterproofing material Coating thickness (㎛) Urethane Flooring Coating thickness (㎛) city
s
tem Primary
Secondary
tertiary
4th urethane undercoat
Epoxy Crete
Urethane waterproofing material
Urethane top coat 50
1,000 to 3,000
1,000 to 3,000
50 to 100 Epoxy
Epoxy Crete
high hardness urethane
High-hard urethane top coat 50
1,000 to 3,000
1,000 to 3,000
50 to 100

* Property of urethane waterproofing material: Satisfies KSF 3211-1 class * Hard urethane property: Satisfies KSF 3211-1 class and KSF 4937

3. Polyurea painting method

division Urea waterproofing material Coating thickness (㎛) Urea Flooring Coating thickness (㎛) city
s
tem Primary
Secondary
tertiary

4th urethane undercoat
Epoxy Crete
hybrid
polyurea
High-hard urethane top coat 50
1,000 to 3,000
1,000 to 3,000

50 to 100 urethane undercoat
Epoxy Crete
pure polyurea

High-hard urethane top coat 50
1,000 to 3,000
1,000 to 3,000

50 to 100

* Properties of hybrid urea: Satisfies KSF 4937 * Properties of pure polyurea: Satisfies KSF 4922 and KSF 4937

<Construction result>

Using the water-soluble epoxy crete prepared as above, the floor was constructed by the painting method shown in [Table 4] to [Table 8] below.

1. Subsurface crack not repaired

division epoxy lining
General specifications urethane lining
General specifications city
s
tem Primary
Secondary
tertiary
4th Epoxy
Epoxy Lining
Epoxy Lining urethane undercoating
medium urethane
medium urethane
Urethane top coat
result crack Crack recurrence Crack recurrence attached Good Good interfloor attachment Good Good

Referring to [Table 4], it can be confirmed that cracks reoccur when the epoxy crete prepared according to the embodiment is not used.

division Improvement #1
(epoxy lining) Improvement #2
(urethane lining) Improvement #3
(Polyurea) city
s
tem Primary
Secondary
tertiary
4th Water soluble epoxy
Epoxy Crete
Epoxy Lining water soluble urethane
Epoxy Crete
medium urethane
Urethane top coat water soluble urethane
water soluble crete
medium urea
High-hard urethane top coat result crack no cracks no cracks no cracks attached Good Good Good interfloor attachment Good Good Good

Referring to [Table 5], when the epoxy crete prepared according to the embodiment was coated, it could be confirmed that no cracks occurred and the adhesion was excellent.

2. Wet surface painting

division epoxy lining
General specifications urethane lining
General specifications city
s
tem Primary
Secondary
tertiary
4th Epoxy
Epoxy Lining
Epoxy Lining urethane undercoating
medium urethane
medium urethane
Urethane top coat result Exterior Air bubbles and blisters Air bubbles and blisters attached Lifting and poor adhesion Lifting and poor adhesion interfloor attachment Good Good

Referring to [Table 6], it can be confirmed that when the epoxy crete prepared according to the embodiment is not used, bubbles and swelling occur in the coating film, and lifting and adhesion failure of the coating film occur.

division Improvement #1
(epoxy lining) Improvement #2
(urethane lining) Improvement #3
(Polyurea) city
s
tem Primary
Secondary
tertiary
4th Water soluble epoxy
Epoxy Crete
Epoxy Lining water soluble urethane
Epoxy Crete
medium urethane
Urethane top coat water soluble urethane
Epoxy Crete
medium urea
High-hard urethane top coat result Exterior Good Good Good attached Good Good Good interfloor attachment Good Good Good

Referring to [Table 7], it can be seen that when the epoxy crete prepared according to the example is coated, bubbles and swelling do not occur in the coating film, and the adhesion is excellent.

3. Epoxy crete coating on the top of the urethane material

division Improvement #1
(epoxy coating) Improvement #2
(urethane lining) Improvement #3
(Polyurea) city
s
tem Primary
Secondary
tertiary
4th urethane undercoat
Urethane based crete
Epoxy Lining urethane undercoat
Urethane based crete
medium urethane
Urethane top coat urethane undercoat
Urethane based crete
medium urea
High-hard urethane top coat result Exterior Good Good Good attached Good Good Good interfloor attachment exfoliation Good (exfoliation) Good (exfoliation)

Referring to [Table 8], it can be seen that the epoxy crete prepared according to the embodiment has excellent adhesion even when it is formed on the top of a primer formed of a different type of urethane material with a different material (physical property).

Although the preferred embodiment of the present invention has been described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. You will be able to. Therefore, one embodiment described above should be understood as illustrative in all respects and not limiting.

Claims (5)

In a weight ratio of 25 parts by weight of bisphenol A type epoxy resin, 25 parts by weight of bisphenol F type epoxy resin, 3 parts by weight of dodecyl phenol, 5 parts by weight of alkyl glycidyl ether and 35 parts by weight of water mixed subject matter;
It is mixed with the above subject to control the curing rate and isophorone diamine (5-Amino-1,3,3-trimethylcyclohexanemethyl amine) 45 parts by weight, 1,3-bis (aminomethyl) benzene (1,3-bis (Aminomethyl) Benzene) 35 parts by weight and 35 parts by weight of water as a curing agent mixed in a weight ratio; and
A powder formed by mixing the main agent and the curing agent in a weight ratio of 45 parts by weight of silicon dioxide (SiO ₂ ), 35 parts by weight of Portland cement, and 3 parts by weight of a modified polycarboxylic ether-based additive,
It is included in a weight ratio of 1 part by weight of the subject matter, 3 parts by weight of the curing agent and 19 parts by weight of the powder,
The bisphenol A type epoxy resin is a bisphenol A diglycidyl ether (Diglycidyl Ether of Bisphenol A) epoxy resin, but the bisphenol A diglycidyl ether epoxy resin has an equivalent weight of 180 to 220 (g / eq) and a viscosity of 8,000 ~ 15,000 (cps, at 25 ℃) is used, and the bisphenol F-type epoxy resin has an epoxy equivalent of 160 to 180 (g / eq), a viscosity of 2,500 to 4,500 (cps, at 25 ℃), and a molecular weight (Mw) of 500 to 1,500 is used, and the alkyl glycidyl ether is C ₁₀ to C ₁₄ alkyl glycidyl ether,
The silicon dioxide has an average particle size of 60 to 80 mesh, a whiteness of 80 to 87%, a fineness of 3,000 to 3,500 cm ² /g, a density of 2.6 to 2.7 g/cm ³ and a purity of 3,000 to 3,500 cm 2 /g. 92% or more is used, and the Portland cement has a strength of 40 N/mm ² or more (28 days), a fineness of 3000 cm ² /g or more, a whiteness of 89 or more, FeO ₃ 0.5% or less, and MgO 5.0% or less. is used,
The polycarboxylate ether (Modified Polycarboxylic ether) additive, CH ₂ =C(CH ₃ )-CH ₂ -(CH ₂ CH ₂ O) ₅₃ -H (weight average molecular weight: 2,400) 0.2 mol, CH ₃ - 0.2 mol of O-(C=O)-(CH ₂ ) ₁₀ CH ₃ and LiOH as a catalyst were put into a reactor equipped with a stirrer and a thermometer and heated at 100-120 ° C for 7 hours to form a polycarboxylate ether-based additive Monomer (CH ₂ =C(CH ₃ )-CH ₂ -(CH ₂ CH ₂ O) ₅₃ -(C=O)-(CH ₂ ) ₁₀ CH ₃ ) 465 g) was obtained, and the polycarboxylate ether additive was obtained. 81 parts by weight of a forming monomer, 14.7 parts by weight of acrylic acid, 5 parts by weight of ethyl 2-hydroxyacrylate, 0.3 parts by weight of 2-mercaptoethanol as a chain transfer agent and t-amyl peroxy-2-ethylhexanoate as a polymerization initiator Water-soluble epoxy crete, characterized in that prepared by adding 1.2 parts by weight dropwise, stirring at 95 ° C. for 6 hours, cooling the temperature to 60 ° C. after completion of the reaction, and adjusting the pH to 4.5 by introducing caustic soda under the atmosphere.
delete delete delete A floor construction method using water-soluble epoxy crete, characterized in that the concrete floor is painted with the water-soluble epoxy crete of claim 1.