KR102596351B1 - Waterproof paint for preventing the neutralization of concrete - Google Patents

Abstract

The present invention relates to a convergence type heat insulating and waterproofing paint composition, which completely excludes volatile organic compounds (VOCs) in line with ESG management to ensure air pollution and human safety, and simultaneously secures heat insulating and waterproofing effects to prevent exposure to ultraviolet rays. The purpose is to secure long-term durability, form a solid film and develop a waterproof function when applied to a concrete exterior wall, thereby demonstrating effective performance in preventing concrete neutralization.
For this purpose, the present invention includes 15 to 45 parts by weight of a water-soluble urethane-acrylic emulsion; 20 to 40 parts by weight of a rubber-based latex binder resin; 5 to 25 parts by weight of pigment; 3 to 20 parts by weight of filler; 0.5 to 2 parts by weight of adhesion enhancer; and 2 to 5 parts by weight of additives; The filler is characterized in that it is one of calcium carbonate, illite, copper powder, or pozzolan, or a mixture of two or more.

Description

Convergence type heat insulating and waterproof paint composition {Waterproof paint for preventing the neutralization of concrete}

The present invention relates to a fusion-type heat insulating and waterproofing paint composition. More specifically, in line with ESG management, volatile organic compounds (VOCs) are completely excluded to ensure air pollution and human safety, and provide heat insulating and waterproofing effects at the same time. It relates to a convergence type heat insulating and waterproofing paint composition that ensures long-term durability due to exposure to ultraviolet rays, forms a solid film and exhibits a waterproof function when applied to a concrete exterior wall, and is effective in preventing neutralization of concrete.

In general, it may feel like a new concept as ESG management has become a global topic, but ESG is not an unfamiliar concept. In other words, in 'sustainable development', which is a concept that started from the familiar 'sustainable development' and seeks to meet the needs of the present while considering the share of future generations, the core values that are directly related to the continuous survival and growth of a company are environmental, social, and governance. ESG is something that has come to be grouped into a structure.

ESG is an abbreviation for Environment, Social Responsibility, and Governance, and today's corporate stakeholders have greater needs for enhancing social value than in the past. This is because consumers prefer products from companies that actively carry out their social responsibilities, even if the price is somewhat higher, than cheap products from companies that neglect their social responsibilities.

In the past, when evaluating a company, ‘financial’ quantitative indicators were the standard, focusing on ‘How much did you invest and how much did you earn?’ However, with the recent increase in the influence of companies on society, such as climate change, there is a growing awareness that ‘non-financial’ indicators may be more important in assessing the actual value of a company. A discourse on corporate social responsibility is being formed, and investors and consumers are also placing emphasis on non-financial values rather than financial values when evaluating companies.

In addition, in the past, the valuation of companies was limited to financial criteria, but there was a demand to evaluate the sustainability of companies through the application of non-financial evaluation criteria, and in response to this demand, ESG Reporting and disclosure of evaluation results is becoming mandatory, and in Korea, all KOSPI-listed companies with assets of KRW 2 trillion or more are legally required to fulfill these obligations from 2025, and all KOSPI-listed companies from 2030. Accordingly, just as accounting reporting is currently mandatory, companies are burdened with having to regularly conduct ESG evaluations in the future.

Accordingly, as volatile organic compounds (VOCs) generated during the manufacture and construction of existing oil-based paints are completely excluded to ensure air pollution and human safety, the development of paints that can obtain a high evaluation of ESG is emerging. .

Meanwhile, the heat island phenomenon, which has recently emerged as an environmental problem in urban areas, is an increase in the temperature in the city center due to the effects of population growth, various artificial facilities, increase in concrete cover, increase in car traffic, emission of artificial heat, and greenhouse effect. This is a phenomenon that is significantly higher than the surrounding area. Accordingly, environmental problems such as abnormal climates, tropical nights, and heat wave disasters due to the worsening heat island phenomenon are emerging around the world, and the damage is increasing every year. As part of alleviating the heat island phenomenon in urban areas, heat-insulating paint is applied to the rooftops of buildings to reflect and radiate solar energy, thereby reducing the waste of cooling and heating energy in buildings.

However, since conventional heat-insulating paint only secures heat-insulating performance by reflecting and radiating solar energy, the heat-insulating layer is constructed after forming a waterproofing layer through a separate waterproofing process. In order to reduce the costs incurred due to this dual process, a heat insulating and waterproofing paint that combines heat insulating and waterproofing performance has been developed. However, the conventional insulating and waterproofing paint has the problem of not securing appropriate heat insulating or waterproofing performance. Due to these problems, water leaks occur frequently due to defects, and as a result, maintenance costs are high.

Meanwhile, in February 2021, the Korea Concrete Society significantly strengthened and revised the concrete structure durability design standards of KDS 14 20 40 among the building standard design standards. This is a part of extending the lifespan and improving quality in terms of quality and maintenance of architectural structures. The average lifespan of houses in Korea is 27 years, which is significantly lower than the average lifespan of houses in developed countries, and is about half that of nearby Japan. It is pointed out that construction structures whose durability is not guaranteed are a serious threat to public safety, and that reconstruction in short cycles is repeated due to a significantly low housing lifespan, resulting in enormous social costs such as rising housing prices, waste of resources, and environmental problems. there is.

In order to improve the above problems, among the concrete structure durability design standards of KDS 14 20 40, the concrete design strength was raised one level and the design strength to ensure durability according to the environment to which the structure is applied was specifically presented.

This is a design method that takes into account the carbonation of concrete, and as the waterproofed surface can be designed lower than the specified design strength, the importance of concrete exterior wall finishing materials has been greatly emphasized. As an example, in the case of external concrete exposed to rain, it must be designed at 30 MPa (EC4) according to the revised design standards, but when subjected to separate waterproofing treatment, it can be designed at 27 MPa (EC3). These regulations are leading to the development of paints that can effectively respond to carbonation during surface treatment such as painting of concrete structures.

Republic of Korea Patent No. 10-2043857 (announced on November 12, 2019) Republic of Korea Patent No. 10-2279044 (announced on July 19, 2021)

Proposed to solve the above problems, the purpose of the present invention is to completely exclude volatile organic compounds (VOCs) in line with ESG management, ensure air pollution and human safety, and simultaneously secure heat insulation and waterproofing effects. The purpose is to provide a convergence type heat-insulating and waterproofing paint composition that ensures long-term durability due to exposure to ultraviolet rays, forms a solid film and exhibits waterproofing function when applied to concrete exterior walls, and is effective in preventing neutralization of concrete.

The present invention for achieving the above object includes 15 to 45 parts by weight of a water-soluble urethane-acrylic emulsion; 20 to 40 parts by weight of a rubber-based latex binder resin; 5 to 25 parts by weight of pigment; 3 to 20 parts by weight of filler; 0.5 to 2 parts by weight of adhesion enhancer; and 2 to 5 parts by weight of additives; The filler is characterized in that it is one of calcium carbonate, illite, zeolite, copper powder, or pozzolan, or a mixture of two or more.

In the present invention, the filler is preferably composed of calcium carbonate, illite, zeolite, copper powder, and pozzolan in a weight ratio of 3:0.5 to 1:0.1 to 0.5:0.1 to 0.5:0.1 to 0.5.

In the present invention, the additive includes 0.3 to 1 part by weight of a dispersant; 0.5 to 2 parts by weight of film forming agent; 0.5 to 2 parts by weight of antifreeze agent; 0 to 0.2 parts by weight of antifoaming agent; and 0.3 to 1 part by weight of a thickener.

In the present invention, the fusion-type heat insulating and waterproofing paint composition preferably includes 5 to 10 parts by weight of coffee powder to improve thermal insulation.

In the present invention, in the case of a crack of 3 mm or less, after putty work, it is finished with a heat-insulating and waterproofing paint composed of the heat-insulating and waterproofing paint composition claimed in claims 1 to 4; In the case of cracks exceeding 3 mm, it is preferable to use a construction method of attaching polyfibre, applying a waterproofing material, and then finishing with a heat-insulating and waterproofing paint composed of the heat-insulating and waterproofing paint composition claimed in claims 1 to 4.

According to the present invention, in line with ESG management, volatile organic compounds (VOCs) are completely excluded to ensure air pollution and human safety, and to simultaneously secure heat shielding and waterproofing effects, ensuring long-term durability due to exposure to ultraviolet rays, making it sturdy when applied to concrete exterior walls. It is effective in preventing neutralization of concrete by forming a film and developing a waterproofing function.

Figure 1 is a process diagram of a repair and reinforcement method according to the present invention.
Figure 2 is a quality test report of the heat insulating and waterproof paint according to the present invention and a comparative product,
2a and 2b are heat-insulating and waterproof paints, and 2c and 2d are comparative products.
Figures 3a and 3b are solar reflectance test results of the heat-insulating waterproof paint according to the present invention and a comparative product.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

The fusion-type heat-insulating waterproof paint of the present invention is applied on a non-woven fabric or woven fabric applied to the base surface, thereby reducing lifting and peeling from the non-woven fabric or woven fabric due to increased elasticity, improving durability, heat insulation and waterproofing, and preventing neutralization. It performs the function it is supposed to do.

The convergence type heat-insulating waterproof paint includes 15 to 45 parts by weight of water-soluble urethane-acrylic emulsion, 20 to 40 parts by weight of rubber-based latex binder resin, 5 to 25 parts by weight of pigment, 3 to 20 parts by weight of filler, and 5 to 40 parts by weight of filler. It is composed of 10 parts by weight of coffee powder, 0.5 to 2 parts by weight of an adhesion enhancer, and 2 to 5 parts by weight of additives.

Water-soluble urethane-acrylic emulsion does not contain volatile organic compounds (VOC), so compared to oil-based polymers, water-soluble urethane-acrylic emulsion is composed of a solvent that is harmless to the human body of workers and environmental regulations in the workplace, so it can achieve the effect of preventing safety and environmental pollution.

The water-soluble urethane-acrylic emulsion is a hybrid emulsion that combines the characteristics of urethane and acrylic. The acrylic emulsion resin has excellent physical properties such as hardness, weather resistance, chemical resistance, pH stability, and pigment miscibility, and the urethane resin has excellent touch and salt resistance. As it has excellent physical properties such as water resistance, elongation, adhesive properties, flexibility, and wear resistance, tensile strength, elasticity, and stability are secured by combining them. In this case, if it is less than 15 parts by weight, the required tensile strength and elasticity cannot be secured, and if it exceeds 45 parts by weight, there is a problem in that the elasticity decreases as it affects the content of other compositions.

Rubber-based latex binder resin maintains formability, stickiness, and soft texture, improves responsiveness to behavior acting on the substrate, and improves adhesion. The rubber latex binder resin is used alone or in combination with one selected from natural rubber latex, chloroprene rubber latex, and EVA latex. In addition, the rubber-based latex binder resin preferably has a glass transition temperature in the range of 10°C to 15°C, so that it has excellent elongation at low temperatures. In this case, if it is less than 20 parts by weight, the function of improving elasticity with the water-soluble urethane-acrylic emulsion cannot be guaranteed, and if it exceeds 40 parts by weight, there is a problem in that a uniform composition cannot be obtained as stirring performance is reduced due to high viscosity. .

Pigments are fine powders that do not dissolve in water or most organic solvents and that add color to other substances, allowing the user to obtain the color required by the working environment, purpose of use, or user. In this case, if the amount is less than 5 parts by weight, the required color cannot be obtained, and if it exceeds 25 parts by weight, the composition ratio of other compositions is affected, so there is a problem in that the required tensile strength or elasticity cannot be obtained.

The filler functions to improve moldability and functionality.

The filler is a mixture of calcium carbonate, illite, zeolite, copper powder or pozzolan in a weight ratio of 3:0.5 ~ 1: 0.1 ~ 0.5: 0.1 ~ 0.5: 0.1 ~ 0.5.

Calcium carbonate is a main component of limestone, marble, calcite, limestone, chalk, ice crystal, clamshell, eggshell, and coral. It is a white substance produced when carbonate ions and calcium ions meet, and is easily absorbed in water. It is insoluble and precipitates in aqueous solution. It is a material that forms stalactites, stalagmites, and stone columns in limestone caves, and most carbon dioxide (CO2) existing on Earth exists in the form of calcium carbonate. Naturally obtained calcium carbonate is used as an additive for various products such as ceramics and glass, and as a starting material for the production of calcium oxide. High-purity synthetic calcium carbonate, called precipitated calcium carbonate, is a composition used in pigments, paints, and as a guarantee for toothpaste or rubber, and in medicine (antacids and calcium supplements in foods), food manufacturing (baking powder), and research.

Illite is a mica-type clay mineral that has various uses and effects such as heavy metal adsorption, antibacterial, and far-infrared ray radiation. It strengthens adhesion by preventing bacterial growth between adherends, and protects the adherend, that is, concrete structures, by emitting far-infrared rays. Prevent neutering. In this case, if the weight ratio is less than 0.5, antibacterial and neutralization prevention effects cannot be obtained, and if it exceeds 1 weight ratio, the required efficacy is not improved, and there is a problem of interference in mixing due to increased viscosity.

Zeolite is a group of minerals belonging to the 'reticular silicate' mineral group and is an 'aluminum silicate'. It is adsorbent and has the effect of removing impurities and deodorizing. In this case, if the weight ratio is less than 0.1, the adsorption and deodorizing effects are minimal, and if it exceeds 0.5 weight ratio, the required efficacy is not improved, and there is a problem of interference with mixing due to increased viscosity.

Pozzolan is made of volcanic ash and is known as a type of pyrophyllite. This is known to be a mineral produced during the Cretaceous period. Its main production area is a mineral discovered and derived from the village of Poggioli near Bari Island in Italy. It was used instead of cement in buildings such as the famous Colosseum and the Pantheon during the Roman era around the 2nd century AD. Scholars have revealed that the reason these buildings have been preserved in their original form for a long time without cracks or corrosion to this day is because pozzolanic was used. Other distribution areas include the Farm Mountain region of the United States, Malaysia, India, and Korea, where it is produced only in very limited regions. Products other than those made in Italy and Korea have no germanium content or far-infrared ray emission effect.

The pozzolan is added to the basic material for concrete production and used as an admixture to give concrete special performance or improve its properties. Inorganic solidifying materials for solidifying waste usually have cement reactivity, so they are inorganic with an appropriate moisture content. It is suitable for solidifying sludge (containing heavy metals). In addition, pozzolan, which has good compatibility with cement, can be used to control sludge moisture content and as a cement replacement solidification aid, and is most commonly used due to its relatively low cost.

In particular, pozzolan is a type of very useful mineral that is being researched and developed as a cutting-edge new material and cosmetic raw material in Korea. Pozzolan produced in Korea is rich in various organic substances and various minerals, among which the precious germanium content, emitting far-infrared rays and negative ions. It has the characteristic of high emissivity. In this case, if the weight ratio is less than 0.1, the far-infrared radiation effect is minimal, and if it exceeds 0.5 weight ratio, the required efficacy is not improved, and there is a problem of interference in mixing due to increased viscosity.

Coffee powder uses processed coffee powder, which consists of cellulose after the lignin is separated. That is, the coffee powder is made by putting coffee grounds in a pressurized container, introducing water vapor, and applying pressure above atmospheric pressure for about 1 to 12 hours, so that the coffee powder has appropriate hardness through heat coagulation of cellulose and lignin is separated. Afterwards, the heat-coagulated condensed coffee powder is re-ground to have a size of 10 to 100 mesh.

The coffee powder obtained by the above-described processing method is made of cellulose, which has low thermal conductivity, thereby improving thermal insulation. This thermal insulation improves the adhesion strength and heat shielding properties of the composition by blocking heat conduction between the adherend and external temperature. Let them do it. In this case, if the coffee powder is less than 5 parts by weight, it does not achieve the required performance, and if it exceeds 10 parts by weight, the required performance improvement effect is insufficient, and instead, there is a problem in that it affects the content of other compositions.

The adhesion enhancer functions to enhance adhesion. In addition, the adhesion enhancer is one or more selected from acrylic silane, epoxy silane, or amino silane, used alone or in combination. In this case, if the amount is less than 0.5 parts by weight, the required adhesion cannot be secured, and if it exceeds 2 parts by weight, the adhesion is improved, but there is a problem in that the agitation property due to viscosity is reduced.

Additives perform the function of ensuring smooth agitation and dispersion of the elastic waterproofing material. The additives include dispersants, film forming agents, anti-freezing agents, anti-foaming agents, and thickening agents. In this case, if it is less than 2 parts by weight, the required performance cannot be achieved, and if it exceeds 5 parts by weight, there is a problem in that it affects the content of other compositions.

In addition, the additive is composed of 0.3 to 1 part by weight of a dispersant, 0.5 to 2 parts by weight of a film forming agent, 0.5 to 2 parts by weight of an anti-freezing agent, 0 to 0.2 parts by weight of an antifoam, and 0.3 to 1 part by weight of a thickener, Use by appropriately mixing 2 to 5 parts by weight of additives.

An example of the use of a heat-insulating and waterproofing paint composed of the fusion-type heat-insulating and waterproofing paint composition configured as described above is as follows with reference to FIG. 1.

In the case of a small crack (S1), such as a crack of 3 mm or less, a repair surface preparation step (S11) is performed to prepare the repair surface to be repaired, as shown in Figure 1a. Next, a putty application step (S12) is performed in which putty is applied to the cracked portion of the cleaned repair surface.

Then, a heat insulating and waterproofing paint application step (S13) is performed in which the above-described heat insulating and waterproofing paint is applied to the repaired surface including the putty.

In the case of a medium crack (S2), such as a crack exceeding 3 mm, a repair surface preparation step (S21) is performed to prepare the repair surface to be repaired, as shown in Figure 1b. Next, a polyfiber attachment step (S22) is performed in which polyfiber is attached to the cleaned repair surface. In addition, a waterproofing material application step (S23) is performed in which the first waterproofing repair work is performed with a waterproofing material on the repaired surface to which the polyfiber is attached.

Then, a heat insulating and waterproofing paint application step (S24) is performed in which the above-described heat insulating and waterproofing paint is applied to the repair surface on which the waterproofing material is applied.

In other words, the cause of the recurrence of microcracks is water leakage. As shown above, the heat-insulating waterproof paint prevents deterioration by ultraviolet rays, prevents concrete neutralization, and provides waterproofing, thereby improving cracks and reinforcing power to prevent re-cracks. prevents.

In addition, heat-insulating and waterproof paint provides weather resistance that prevents or delays color change due to the external environment and provides a subtle beauty with semi-gloss.

Hereinafter, the specific contents of the present invention will be described in detail through the following examples, but these are for illustrative purposes of the present invention and are not intended to limit the scope of protection limited by the appended claims.

The heat-insulating and waterproof paint of the present invention includes 40 parts by weight of water-soluble urethane-acrylic emulsion, 35 parts by weight of rubber-based latex binder resin, 15 parts by weight of pigment, 5 parts by weight of filler, 1 part by weight of adhesion enhancer, and 4 parts by weight of additives. It was created with

The heat-insulating paint of the comparative product mixes 35 parts by weight of SBR latex resin, 50 parts by weight of ceramic component, and 0.5 part by weight of ultraviolet absorber (hydroxybenzophenone), and contains dispersant, shrinkage reducer, retardant, inorganic pigment, filler, etc. A paint composition was prepared by mixing a certain amount of additives.

Quality tests were conducted on the heat insulating and waterproof paint of the present invention and the heat insulating paint of comparative products.

As shown in Figures 2a and 2b, the heat insulating waterproof paint of the present invention has an elongation rate of 425%, an elongation rate of 209% at 20°C, a tensile strength ratio (heat treatment) of 141%, and an elongation rate (heat treatment) of 320%.

On the other hand, as shown in Figures 2c and 2d, the heat insulating paint of the comparative product has an elongation rate of 407%, an elongation rate of 199% at 20°C, a tensile strength ratio (heat treatment) of 147%, and an elongation rate (heat treatment) of 307%.

As above, it can be seen that the heat insulating waterproof paint of the present invention has improved tensile properties, responsiveness, and adhesion compared to the heat insulating paint of comparative products.

In addition, a solar reflectance test was conducted on the heat-insulating and waterproof paint of the present invention and the heat-insulating paint of a comparative product.

As shown in Figure 3a, the heat-insulating waterproof paint of the present invention has a solar reflectance of 86.3% (300 nm to 780 nm), 81.3% (780 nm to 2500 nm), and 84.0% (300 nm to 2500 nm).

On the other hand, as shown in Figure 3b, the heat insulating paint of the comparative product has a solar reflectance of 77.2% (300㎚~780㎚), 79.1% (780㎚~2500㎚), and 77.9% (300㎚~2500㎚).

As above, it can be seen that the heat insulating waterproof paint of the present invention has a higher solar radiation reflectance compared to the heat insulating paint of comparative products, and through this, the heat insulating property is improved.

The convergence-type heat insulating and waterproofing paint composition formulated as described above can achieve resource recycling, prevent environmental pollution and reduce carbon by using eco-friendly raw materials, and can be used as a vehicle for responding to the urban heat island phenomenon and climate crisis. By providing heat-repelling paint, we respond to ESG management, which is becoming a global issue, and contribute to carbon neutrality.

What has been described above is only one example for implementing the fusion-type heat-insulating waterproof paint composition, and the present invention is not limited to the above-described examples. Those skilled in the art will understand that various changes can be made without departing from the gist of the present invention.

S1: Small crack S2: Medium crack

Claims (5)

15 to 45 parts by weight of water-soluble urethane-acrylic emulsion;
20 to 40 parts by weight of a rubber-based latex binder resin;
5 to 25 parts by weight of pigment;
3 to 20 parts by weight of filler;
0.5 to 2 parts by weight of adhesion enhancer; and
It is composed of 2 to 5 parts by weight of additives;
The filler is a fusion-type heat insulating waterproof paint composition, characterized in that calcium carbonate, illite, zeolite, copper powder, and pozzolan are composed of calcium carbonate, illite, zeolite, copper powder, and pozzolan in a weight ratio of 3:0.5 ~ 1: 0.1 ~ 0.5: 0.1 ~ 0.5: 0.1 ~ 0.5. .
delete The method of claim 1, wherein the additive is,
0.3 to 1 part by weight of a dispersant;
0.5 to 2 parts by weight of film forming agent;
0.5 to 2 parts by weight of antifreeze agent;
0 to 0.2 parts by weight of antifoaming agent; and
0.3 to 1 part by weight of thickener;
A fusion-type heat-insulating waterproof paint composition, characterized in that it is composed of.
The method of claim 1, wherein the fusion-type heat-insulating waterproof paint composition includes
5 to 10 parts by weight of coffee powder to improve insulation;
A fusion-type heat-insulating waterproof paint composition comprising:
In the case of a crack of 3 mm or less, after putty work, it is finished with a heat-insulating and waterproofing paint composed of the heat-insulating and waterproofing paint composition claimed in any one of claims 1, 3 to 4;
In the case of cracks exceeding 3 mm, the construction method consists of attaching polyfibre, applying a waterproofing material, and then finishing with a heat-insulating and waterproofing paint composed of the heat-insulating and waterproofing paint composition claimed in any one of claims 1, 3 to 4. A fusion-type heat insulating and waterproofing paint composition characterized by:

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