KR101690518B1 - Waterproof agent for elastic membrane and method for producting thereof - Google Patents

Abstract

The present invention is to provide an environmentally-friendly waterproof agent for an elastic membrane, comprising 60-85 wt% of polyurethane, 5 to 15 wt% of amino resin, 3 to 8 wt% of novolac epoxy resin, 0.5 to 1 wt% of polyacrylic acid, 1.5 to 5 wt% of sodium fluoride, 0.5 to 1.5 wt% of sodium silicofluoride, 3 to 8 wt% of a low shrinking agent, and 1.5 to 2 wt% of sodium aluminate with respect to 100 wt% of the waterproof agent for an elastic membrane. The present invention is also to provide a constructing method using the environmentally-friendly waterproof agent for an elastic membrane. According to the present invention, by improving corrosion resistance and chemical resistance against salt of an applied structure, environmental pollution occurring when the waterproof agent melts down can be prevented.

Description

Technical Field [0001] The present invention relates to a waterproof agent for an elastic membrane,

The present invention relates to an environmentally friendly elastic coating film waterproofing agent and a method of applying the same, and more particularly, to an environmentally friendly elastic coating film waterproofing agent which is applied to the roof of a building or other structures to minimize leakage, will be.

In general, the elastic coating film waterproofing agent is a kind of waterproofing agent which applies water or a liquid type waterproofing agent on the surface to evaporate moisture or solvent and use the remaining film.

Most of the elastic coating waterproofing agents except for epoxy systems are used extensively in the place where cracks are expected or in the connection sites because the elongation rate of the elastic coating waterproofing agents is large.

However, in the conventional resin type waterproofing agent for a resin type, the emulsion agent (emulsion) is repeatedly applied to the surface of the base structure to form a waterproof layer, which makes it difficult to apply the composition in a large area.

In addition, the conventional solvent-type elastic film-forming waterproofing agent has a strong flammability in the process of forming a waterproof layer by coating natural rubber and synthetic rubber in volatile solvent several times, resulting in inadvertent fire, There was a problem that we should be careful about suffocation accident when we can not work.

The conventional epoxy type elastic film waterproofing agent has excellent adhesive strength and can be integrated on the concrete attachment surface. However, when the structure is cracked, the elongation percentage is small and the cracked portion is not waterproofed.

On the other hand, the conventional oil-based elastic coating waterproofing agent contains a large amount of carcinogenic organic solvents such as toluene, xylene, butyl acetate, and methyl isobutyl ketone, which poses a serious risk to human health.

In particular, the conventional planetary type waterproofing agent is used for building houses and buildings that emit asbestos, formaldehyde and other indoor pollutants, stimulating the eyes, nose and throat of the human body, causing headaches and dizziness, And causing respiratory diseases such as asthma.

In addition, the liquid type elastic coating film waterproofing agent penetrates into fine gaps and is convenient in construction such as corner parts, but since it is applied several times, the thickness is not constant and it takes a considerable time to cure after one application. .

The liquid type elastic coating film waterproofing agent applied here has a problem that leakage occurs due to breakage or damage due to external impact due to thinning of the solvent after volatilization.

Korean Patent No. 10-0315715 (December 12, 2001) Korean Patent No. 10-0778230 (November 28, 2007) Korean Patent No. 10-0990459 (October 29, 2010) Korean Patent No. 10-1000068 (Dec. 10, 2010) Korean Registered Patent No. 10-1144678 (2012.05.24.) Korean Registered Patent No. 10-1169892 (Jul. 31, 2012)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

An object of the present invention is to provide an eco-friendly elastic coating film waterproofing agent which can improve the corrosion resistance and chemical resistance of a coated structure by increasing salinity and increase the crack resistance and bending resistance, thereby minimizing the leakage phenomenon and a method of using the same.

In order to achieve the above object, the present invention provides an environmentally-

With respect to the total amount of the elastic film water repellent agent of 100% by weight,

Wherein the polyvinyl alcohol resin composition comprises 60 to 85% by weight of a polyurethane, 5 to 15% by weight of an amino resin, 3 to 8% by weight of a novolak type epoxy resin, 0.5 to 1% by weight of polyacrylic acid, 1.5 to 5% by weight of sodium fluoride, , 3 to 8% by weight of a water reducing agent, and 1.5 to 2% by weight of sodium aluminate.

According to another aspect of the present invention, there is provided an eco-

A first step of applying a primer to the surface of the structure;

Wherein the total amount of the elastic film waterproofing agent is 60 to 85 wt%, the amino resin is 5 to 15 wt%, the novolak type epoxy resin is 3 to 8 wt%, the polyacrylic acid is 0.5 to 1 wt%, the fluorinated sodium is 1.5 to 10 wt% 5 to 5% by weight of sodium silicate, 0.5 to 1% by weight of sodium silicate, 3 to 8% by weight of a water reducing agent and 1.5 to 2% by weight of sodium aluminate are mixed and then applied onto the surface of the primer- ;

And a third step of applying a top coat agent to the surface of the structure coated with the elastic coating film water repellent agent.

The second step is characterized in that the elastic coating film waterproofing agent is coated with a roller or a spray gun so as to have a thickness of 0.6 to 2 mm.

According to another aspect of the present invention, there is provided a method for manufacturing an environmentally friendly elastic film-

A first step of attaching a waterproof sheet to a surface of a structure;

Wherein the total amount of the elastic film waterproofing agent is 60 to 85 wt%, the amino resin is 5 to 15 wt%, the novolak type epoxy resin is 3 to 8 wt%, the polyacrylic acid is 0.5 to 1 wt%, the fluorinated sodium is 1.5 to 10 wt% 5 to 5 wt%, sodium silicate 0.5 to 1 wt%, a water reducing agent 3 to 8 wt%, and sodium aluminate 1.5 to 2 wt%, and then the surface of the waterproof sheet- A second step of applying;

And a third step of applying a top coat agent to the surface of the structure coated with the elastic coating film water repellent agent.

The present invention has the effect of improving the corrosion resistance and chemical resistance by the salt of the applied structure and preventing environmental pollution caused by melting of the waterproofing agent.

In addition, the present invention has the effect of improving the quality of the construction by increasing the adhesive force to the surface of the waterproofing agent and the structure.

Particularly, the present invention has the effect of shortening the curing time and increasing the crack resistance and flex resistance, thereby minimizing the leakage phenomenon.

In addition, the present invention has the effect of improving the durability and service life of a structure by completely penetrating the surface of the structure to form a waterproof layer.

Hereinafter, preferred embodiments of the present invention will be described in detail.

The elastic film waterproofing agent of the present invention is characterized in that it comprises 60 to 85% by weight of polyurethane, 5 to 15% by weight of amino resin, 3 to 8% by weight of novolak type epoxy resin, 0.5 to 1% by weight of polyacrylic acid, 1.5 to 5% by weight of sodium fluoride, 0.5 to 1% by weight of sodium silicate, 3 to 8% by weight of a water-reducing agent and 1.5 to 2% by weight of sodium aluminate.

In the present invention, the polyurethane is a saturated copolymer and does not have a double bond, so it has weather resistance, chemical resistance, excellent low temperature characteristics, excellent ozone resistance, and excellent electrical insulation.

Here, the weatherability of the polyurethane is superior to that of other urethane, and it is highly resistant to exposure and ultraviolet rays to ensure a long life.

It is preferable that the polyurethane is mixed in an amount of 60 to 85% by weight.

This is because when the content of the polyurethane is less than 60% by weight, the waterproof function, the stretchability, and the ultraviolet ray shielding function are lost and the waterproof function is lost, and there is a risk of breakage due to the decrease of elastic force.

On the contrary, when the content of the polyurethane exceeds 85% by weight, the price of the polyurethane is increased due to the expensive raw materials, and the different physical properties of the polyurethane are different due to the different contents of the materials.

In the present invention, the amino resin is a thermosetting resin produced by an addition condensation reaction of a compound having an amino group in a molecule. It has excellent solvent resistance, very hard, high mechanical strength and excellent surface gloss.

In addition, the curing progress is slow even at a room temperature, which is preferable in that the resin can exhibit an effect of excellent storage stability.

The amino resin is preferably mixed in the resin composition in an amount of 5 to 15% by weight.

This is because when the amino resin is less than 5% by weight, the anticipation of mechanical strength such as tensile strength, flexural strength and compressive strength of the waterproofing agent is remarkably lowered. On the other hand, when the amino resin is more than 15% by weight, The speed is lowered.

In the present invention, the novolak type epoxy resin is excellent in heat resistance, flame retardancy, adhesive force, and bonding force, and thus has various uses.

In the present invention, the novolak type epoxy resin is added to increase the bonding force of the waterproofing agent and to improve the bonding force between the polymers, so that the surface layer of the structure after the application of the elastic coating film waterproofing agent from the external impact is broken .

The novolak type epoxy resin is preferably mixed in an amount of 3 to 8% by weight.

If the amount of the novolac epoxy resin is less than 3% by weight, there is a problem in that the waterproofing function is poor due to the inability to increase the bonding force between the polymers. On the contrary, if the amount exceeds 8% by weight, And there is a problem that material separation occurs at a high temperature.

In the present invention, the polyacrylic acid is a compound exhibiting an increase in flowability at the same unit water yields a role as an interface activator.

Particularly, it absorbs on the surface of the elastic coating film water repellent particles, and charges are given to the particle surface to cause mutual repulsive force between the particles, thereby dispersing the agglomerated particles to improve the strength enhancement and durability.

That is, by using polyacrylic acid, the number of capillaries as the movement path of water can be reduced to make a waterproofing agent having a more dense structure. The waterproofing agent having such a dense structure can greatly help suppress moisture penetration on the surface.

The polyacrylic acid is preferably mixed in an amount of 0.5 to 1 wt%.

If the content of the polyacrylic acid is less than 0.5% by weight, the fluidity is lowered and the performance is not achieved. On the other hand, when the content of the polyacrylic acid exceeds 1% by weight, the viscosity of the waterproofing agent decreases, The strength of the waterproofing agent is lowered.

In the present invention, the sodium fluoride has a primary purpose as a filler, and secondly it has a role in improving the durability of the waterproofing composition.

The sodium fluoride is preferably mixed in an amount of 1.5 to 5% by weight.

This is because the filling efficiency is lowered when the content of the fluorinated sodium acid is less than 1.5% by weight, and when the content exceeds 5% by weight, the strength of the waterproofing agent is lowered due to excessive use.

In the present invention, the sodium silicate serves to inhibit moisture from penetrating into the composition, so that moisture can not penetrate into the composition, so that moisture penetrates into the waterproofing agent of the present invention, thereby preventing deformation of the product.

The sodium silicate is preferably mixed in an amount of 0.5 to 1 wt%.

This is because if the content of sodium silicate is less than 0.5 wt%, the effect obtained by performing the role of sodium silicate is insignificant. On the other hand, if the content of sodium silicate exceeds 1 wt%, the effect is no longer expected .

In the present invention, the water-reducing agent is not only water-resistant, but also prevents the water-repellent agent from shrinking during curing of the water-repellent agent.

At this time, the water-reducing agent may be added by adding any one of polyvinyl acetate, saturated polyester, and vinyl chloride.

The water-reducing agent may be mixed in an amount of 3 to 8% by weight.

The reason for this is that the effect is insignificant when the content of the water-reducing agent is less than 3% by weight, and the performance is not further improved when it exceeds 8% by weight.

In the present invention, the sodium aluminate is excellent in chemical resistance and forms a structure of a dense cured body at the time of curing, thereby exhibiting high strength and promoting initial curing.

The sodium aluminate is preferably mixed in an amount of 1.5 to 2% by weight.

Particularly, when the sodium aluminate content is less than 1.5% by weight, the effect of initial shrinkage is insignificant. On the contrary, when the content of sodium aluminate exceeds 2% by weight, the initial shrinkage is excessively excessive,

In addition, a method of applying the environmentally friendly elastic coating film waterproofing agent of the present invention will be described as follows.

First, a primer is applied so that a waterproofing agent can easily stick to the surface of the structure,

The elastic coating film water repellent agent according to the present invention is coated on the surface of the primer-coated structure with a roller or a spray gun so as to have a thickness of 0.6 to 2 mm.

When the waterproofing agent applied is less than 0.6 mm, the elasticity of the elastic coating film is excellent, but when the thickness of the waterproofing agent is more than 2 mm, the elasticity of the elastic coating film is excellent. However, I have a problem.

In addition, the top coat agent is applied again to the surface of the structure coated with the elastic coating film water repellent agent to protect the elastic coating film water repellent agent.

In the present invention, the waterproof sheet may be attached to the surface of the structure without applying the primer depending on the installation site and the construction conditions.

And an environmentally friendly elastic coating film waterproofing agent according to the present invention were mixed in the contents shown in Table 1.

≪ Comparative Example 1 &

100 wt% of epoxy resin

≪ Comparative Example 2 &

No treatment

≪ Experimental Example 1 > (Anti-salt-inhibiting performance test)

In order to test the resistance to chlorine ion penetration, three specimens having a thickness of 5 cm were cut from the concrete of the structure which became 28 days old. The waterproofing agent according to Example 1 and the waterproofing agent according to Comparative Example 1 An epoxy resin waterproofing agent was applied, and the third test piece was not treated.

Three specimens were fabricated, and a diffusion cell was constructed on each of the test specimens. The electric current measured every 30 minutes under the condition that a direct current power of 60 V was applied for 3 hours was integrated with respect to time, As shown in Table 2 of FIG.

As shown in Table 2 above, the waterproofing agent according to the present invention had no measured amount of passing charge in the first test piece coated with Example 1. Therefore, the concrete coating of the waterproofing agent-coated structure according to the present invention is excellent in resistance to chlorine ion penetration .

≪ Experimental Example 2 > (Crack Correspondence Test)

Four test specimens were prepared as follows for precise comparison experiments.

(1) A waterproofing agent according to Example 1 was uniformly applied on one side of a concrete having an age of 20 days without bubbles, and then cured for 7 days to prepare a first test piece.

(2) A waterproofing agent according to Example 1 was uniformly applied on one surface of a steel specimen so as to have no bubbles, and then cured for 7 days to prepare a second test specimen.

(3) A waterproofing agent according to Comparative Example 1 was uniformly applied on one side of a concrete having an age of 20 days without air bubbles, and then cured for 7 days to prepare a third test piece.

(4) A waterproofing agent according to Comparative Example 1 was uniformly applied on one surface of a steel specimen so that there was no air bubbles, and then cured for 7 days to prepare a fourth test specimen.

Each test specimen thus prepared was stored at a temperature of -20 to 20 DEG C for 1 hour or more, and the specimen was divided into two by using a KSF 2620 4 type A and a groove depth of 4 mm. min. After that, the test specimens were visually inspected for cracks or fractures. The results were as shown in Table 3 below.

As shown in Table 3 above, it was confirmed that the test pieces coated with the waterproofing agent according to the present invention were free from cracks such as cracks or fractures regardless of concrete or steel.

≪ Experimental Example 3 > (Evaluation of flexural / flexural strength)

In order to test the bending resistance of the waterproofing agent according to the present invention, the steel material specimen was molded into a film using the waterproofing agent according to Example 1, and then the steel specimen was wound on a Ø10 mm round bar, which is an extreme condition, After flexing, the test was carried out in accordance with KSM 5000 standard.

As a result of the test, it was confirmed that the coating formed by the waterproofing agent according to the present invention did not have any abnormality even in the extreme conditions as described above, and it was confirmed that there was sufficient flexural resistance and flexural strength.

≪ Experimental Example 4 > (Chemical resistance test)

After forming a film on the iron specimen as the waterproofing agent according to Example 1, the iron specimen was settled into the drug according to the following Table 4 for 120 hours each, and its surface was visually observed.

As shown in Table 4 above, the specimens coated with the waterproofing agent according to the present invention can be exposed to all chemicals such as acid, alkali, salt, and petroleum for a certain period of time. The surface changes such as peeling or melting, It was confirmed that there was no such problem.

Generally, when a chemical resistant product is used, when the waterproofing agent melts or the surface is peeled off, the waterproofing agent causes environmental pollution.

However, the waterproofing agent according to the present invention is environmentally friendly because it has strong chemical resistance and can prevent such environmental problems in advance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

Claims (4)

With respect to the total amount of the elastic film water repellent agent of 100% by weight,
Wherein the polyvinyl alcohol resin composition comprises 60 to 85% by weight of a polyurethane, 5 to 15% by weight of an amino resin, 3 to 8% by weight of a novolak type epoxy resin, 0.5 to 1% by weight of polyacrylic acid, 1.5 to 5% by weight of sodium fluoride, By weight of a water-repellent agent, 3 to 8% by weight of a water-reducing agent, and 1.5 to 2% by weight of sodium aluminate. A first step of applying a primer to the surface of the structure;
Wherein the total amount of the elastic film waterproofing agent is 60 to 85 wt%, the amino resin is 5 to 15 wt%, the novolak type epoxy resin is 3 to 8 wt%, the polyacrylic acid is 0.5 to 1 wt%, the fluorinated sodium is 1.5 to 10 wt% 5 to 5% by weight of sodium silicate, 0.5 to 1% by weight of sodium silicate, 3 to 8% by weight of a water reducing agent and 1.5 to 2% by weight of sodium aluminate are mixed and then applied onto the surface of the primer- ;
And a third step of applying a top coat agent to the surface of the structure coated with the elastic coating film water repellent agent. The method according to claim 2, wherein the second step comprises coating the elastic coating film waterproofing agent with a roller or a spray gun to form a thickness of 0.6 to 2 mm. A first step of attaching a waterproof sheet to a surface of a structure;
Wherein the total amount of the elastic film waterproofing agent is 60 to 85 wt%, the amino resin is 5 to 15 wt%, the novolak type epoxy resin is 3 to 8 wt%, the polyacrylic acid is 0.5 to 1 wt%, the fluorinated sodium is 1.5 to 10 wt% 5 to 5 wt%, sodium silicate 0.5 to 1 wt%, a water reducing agent 3 to 8 wt%, and sodium aluminate 1.5 to 2 wt%, and then the surface of the waterproof sheet- A second step of applying;
And a third step of applying a top coat agent to the surface of the structure coated with the elastic coating film water repellent agent.