KR101502457B1 - Environment-freindly multi-functional coating composition - Google Patents

Abstract

The present invention relates to an environmentally-friendly painting composition and, more specifically, to an environmentally-friendly painting composition comprising slaked lime, a binder resin, and a functional additive, wherein the binder resin is a mixture of a polymer having a hydrophilic radical and a polymer having no hydrophilic radical. The painting composition of the present invention has an inhibition function of sick house syndrome, an antibacterial/antifungal function, a humidifying function, etc.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an environmentally friendly multi-

The present invention relates to an environmentally friendly multi-functional coating composition. More particularly, the present invention relates to an eco-friendly multi-functional coating composition which is excellent in stability of a composition and exhibits an effect of suppressing sick house syndrome, antibacterial / antifungal function, humidity control function and the like.

In modern housing construction, the finishing of the interior wall surface has been adopted in many ways, such as the coating of emulsion, etc. Recently, however, the problem of chemical substances such as chemical hypersensitivity and Sick House Syndrome (Sick House Syndrome) There is a growing interest in eco-friendly finishing materials.

In particular, the Ministry of Environment enforces the "Indoor Air Quality Control Act for Multi-use Facilities, etc.", the Housing Rating Indication System and Eco-Friendly Building Certification System by the Ministry of Land, Transport and Maritime Affairs, the Housing Construction Project for over 500 households from 2014, Friendly housing construction standards "(Ministry of Land, Transport and Logistics Notice No. 2013-612), and the environmental standards of buildings are being strengthened day by day.

Further, according to the demand of the consumers for the indoor air quality, not only the functionality that can reduce the concentration of harmful chemical substances such as volatile organic compounds and ammonia generated in building materials, but also the humidity of the room, To prevent the generation of fungi, and so on.

As a result, natural materials such as plaster as an environmentally friendly finishing material have been reevaluated once again. The plaster (slaked lime) is excellent in functions such as humidity control (hygroscopicity and moisture resistance), dew condensation prevention and anti-moldiness, As building material that has been used for a long time as timber, it is spotlight again.

Conventional techniques for the coating composition are exemplified by the following Patent Documents 1 and 2, and can be understood with reference to them. As a result, the entire contents of Patent Documents 1 and 2 are cited in the present specification as prior art contents.

Patent Literature 1 discloses a slurry containing 5 to 15 wt% of powdery slaked lime and having a glass transition temperature of -20 ° C or less, preferably -25 to -55 ° C , 20 to 60 parts by weight of an emulsion of an acrylic resin in a solid content of 50 to 100 parts by weight, and water is added to the coating composition if necessary, followed by kneading. The composition is applied to the base material at least 1 mm, dried and cured A technique for forming a surface finished layer is disclosed.

Patent Document 2 describes a method for producing an inorganic coating composition and an inorganic coating composition produced thereby. More specifically, the present invention relates to an inorganic coating composition prepared by mixing silver, a natural oak powder, an elvan powder, zeolite, diatomaceous earth and titanium dioxide to form a mixed powder fair; Mixing the mixed powder with a silicate-based inorganic liquid binder to form a mixed composition; And a step of adding silver nanoparticles, wherein the zeolite is a mixture of a zeolite type 4A type and an X type zeolite, and a method for producing a coating composition, which comprises reducing a volatile organic compound, controlling humidity, deodorizing, antibacterial, And an inorganic coating composition having functions such as heat insulation.

JP Specification No. 2002-317143 A (Oct. 31, 2002) KR Disclosure 10-2010-0041251 A (2010.04.22.)

As described above, the plaster (slaked lime) is capable of controlling humidity, and is excellent in functions such as humidity control of the air, dew condensation preventing property and antifungal property. However, since the adhesion force of the coating film formed by applying the coating composition due to moisture absorption is weak .

Thus, it is intended to provide a coating composition which is free from the components of the composition due to moisture, while having an effect of suppressing sick house syndrome, antibacterial / antifungal function, humidity control function and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art,

Slaked lime, a binder resin, and a functional additive,

The binder resin is a mixture of a polymer having a hydrophilic group and a polymer having no hydrophilic group, wherein the binder resin is a mixture of a polymer having a hydrophilic group and a polymer having no hydrophilic group.

In the present invention, the binder resin includes an ethylene vinyl acetate copolymer, and a terpolymer of ethylene, vinyl laurate and vinyl chloride.

The present invention also provides an eco-friendly multi-functional coating composition comprising ethylene / vinyl acetate copolymer: ethylene / vinyl laurate / vinyl chloride terpolymer in a ratio of 1: 0.1 to 1: 1.

In the present invention, the binder resin may further comprise at least one selected from the group consisting of kaolin, calcium carbonate, potassium carbonate and polyvinyl alcohol.

In the present invention, the functional additive is at least one selected from the group consisting of titanium dioxide, zeolite, antifoaming agents, hyperactive agents, antibacterial agents, and antifungal agents.

The present invention also provides an eco-friendly multi-functional coating composition comprising 25 to 75 wt% of slaked lime, 5 to 30 wt% of a binder resin, and 0.01 to 35 wt% of a functional additive.

The paint composition of the present invention has effects such as a sick house syndrome inhibiting function, an antibacterial / antifungal function, a humidity control function and the like.

1 to 3 show the results of the test report of the Korea Institute of Construction & Living Environment Test according to the first embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

According to the present invention,

Slaked lime, a binder resin, and a functional additive,

Wherein the binder resin is a mixture of a polymer having a hydrophilic group and a polymer having no hydrophilic group.

The binder resin may be an ethylene vinyl acetate copolymer and a terpolymer of ethylene, vinyl laurate and vinyl chloride.

Among the polymers having a hydrophilic group that can be used in the present invention, in particular, the ethylene vinyl acetate copolymer meets with alkali alkali slag and causes an alkali-aggregating reaction to form a network structure in the structure of the coating film, The network structure formed is selected as a highly preferable material because it acts favorably on adsorption of harmful substances such as formaldehyde, adsorption / desorption of moisture, and adhesion of functional components such as zeolite.

The ethylene vinyl acetate is a copolymer of ethylene and vinyl acetate and has a number of CAS 24937-78-8 and is a known substance widely used as an adhesive. In the present invention, in order to enhance adhesion of a composition containing slaked lime It is an ingredient to be added.

A more detailed description of ethylene vinyl acetate as a copolymer of ethylene and vinyl acetate can be found in WIKIPEDIA " Ethylene-vinyl acetate " (http://en.wikipedia.org/wiki/Ethylene-vinyl_acetate, A known document can be referred to. As such, all of the contents of the above documents are incorporated into the contents of this specification.

Among the polymers having no hydrophilic group that can be used in the present invention, particularly, the terpolymers of ethylene, vinyl laurate, and vinyl chloride are excellent in water resistance, moisture resistance, and water repellency, .

The terpolymer of ethylene, vinyl laurate, and vinyl chloride is a component added for improving water / hydraulic strength.

A more detailed description of the terpolymers of ethylene, vinyl laurate, and vinyl chloride can be understood with reference to the known literature of U.S. Patent No. 7,455,727 B2. As such, all of the contents of the above documents are incorporated into the contents of this specification.

Particularly, in the present invention, the content ratio of the ethylene vinyl acetate copolymer as the adhesion strengthening component and the water-repellent / water-repelling components ethylene, vinyl laurate and vinyl chloride is very important, and more specifically, ethylene vinyl acetate Acetate copolymer: a terpolymer of ethylene, vinyl laurate and vinyl chloride in a ratio of 1: 0.1 to 1: 1.

If the content of the ethylene vinyl acetate copolymer as an ingredient for reinforcing the adhesive strength is out of the above range and is too low, the adhesive strength of the composition component containing the slaked lime is weak, so that the peeling of the composition component may occur (especially titanium dioxide, zeolite, Antibacterial agent, anti-fungal agent and the like), the content of the water-repellent / water-repellent components ethylene, vinyl laurate and vinyl chloride is less than the above range and is insufficient (in other words, If the ethylene vinyl acetate copolymer content is out of the above range, the coating film formed by the composition becomes weaker in water resistance, and peeling of the composition constituting the composition by moisture may occur. This is because the ethylene vinyl acetate copolymer is a polymer having a hydrophilic group and may have a low water resistance.

That is, the water resistance and adhesive strength can be sufficiently expected only within the range of the specific content ratio of the ethylene vinyl acetate copolymer as the adhesive strength strengthening component and the ethylene / vinyl laurate / vinyl chloride terpolymer as the waterproof / water repellent strengthening components. Further, this point can directly affect the absorption / moisture-proofing power of the coating composition and the VOC adsorption power. If the water hydraulic force is excessively large, the moisture absorbing power tends to weaken. If only the moisture absorbing power is excessively large, the moisture-proofing power is weakened, or the absorption / Because. A more detailed description thereof will be understood with reference to the following Examples and Experimental Examples.

The binder resin is used in an amount of 5 to 30% by weight based on the total weight of the coating composition. When the amount is less than the above range, the adhesion to the interface is lowered when the coating composition is used. When the content exceeds the above range, You may not be able to keep it.

The binder resin may further comprise at least one selected from the group consisting of kaolin, calcium carbonate, potassium carbonate and polyvinyl alcohol.

The kaolin is a clay mineral having a chemical composition of Al ₂ Si ₂ O ₅ (OH) ₄ , and is added as a viscosity regulator for improving the viscosity of the binder resin, together with titanium dioxide, .

The calcium carbonate may be added as a paint additive for imparting whiteness, an adhesion strengthening auxiliary agent, a filler or the like.

The above-mentioned potassium carbonate can be added for the purpose of improving the dispersibility of the respective components of the coating composition or increasing the amount of the coating and adjusting the roughness of the coating to improve the smoothness of the brush.

The polyvinyl alcohol may be added as a hydrophilic polymer for the purpose of protecting colloid or emulsifying agent of the ethylene vinyl acetate copolymer and the terpolymer of ethylene, vinyl laurate and vinyl chloride.

Since the slaked lime must satisfy the physical properties of the coating material while maintaining the specific humectancy of the slaked lime, it is preferable that the slaked lime is suitable to the standard of the lime plaster, and more specifically, the Japanese Lime JIS A 9602 It is preferable that the slush satisfies the JIS A 9603 standard.

The slaked lime is not particularly limited, but in consideration of the surface roughness and the like of the coating composition, it is preferable to use those having an average particle diameter within a range of 5 to 20 mu m.

The slaked lime is preferably used in an amount of 25 to 75% by weight of the entire coating composition. If the amount of calcium hydroxide is less than or less than the above range, plasterability may not be satisfied.

In addition, the coating composition of the present invention further comprises at least one component selected from titanium dioxide, zeolite, antifoaming agent, hyperpolarising agent, antibacterial agent and antifungal agent as the functional additive.

The functional additive is suitably contained in an amount of 0.01 to 35% by weight. If the content of the additive exceeds this range, the content of the slaked lime and the binder becomes small, which is not preferable to the physical properties of the coating film and the additive itself may adversely affect the physical properties of the coating film, and if it is less than this range,

The titanium dioxide is a component used for improving the white color of the lime paint composition, and may be used in an amount of 5 to 20% by weight of the paint composition of the present invention.

Titanium dioxide may be anatase or rutile type, but any of them may be used. If the amount is less than the above range, the hiding power is lowered. If it exceeds the above range, the water-based paint may not be maintained in a paste state due to the increase of the non-volatile matter / hiding power of the water-based paint.

The zeolite is added to the porous aluminosilicate hydrate of alkali and alkaline earth metal for the purpose of not only adsorbing volatile organic compounds (VOC) and other harmful substances but also moisture control effect by adsorption / desorption of moisture in the air . There is no particular limitation on the kind of zeolite that can be used in the present invention, and both natural zeolite and synthetic zeolite can be used without limitation.

The content of the zeolite is preferably 1 to 10% by weight based on the total coating composition. This is for realizing an organic compound of the coating composition, or an ability of adsorbing moisture and an appropriate thickness of the coating.

The antifoaming agent may be added to prevent foaming. When the coating composition is mixed with water, binders and the like, unintentional air may be generated, which can change the density and lower the strength. In addition, bubbles can leave defects such as eruptions and pinholes on the surface of the coating film.

Examples of the antifoaming agent that can be used in the present invention include antifoaming agents that are self-evident and commonly used by those skilled in the art (hereinafter referred to as "those skilled in the art"). Specific examples thereof include polycarboxylates A mixture of at least one member selected from the group consisting of an alcohol, a glycol, a glycol, a cyclohexane, a silicone, a fluorochemical surfactant, polyoxyethylene and an alkylphenyl ether can be used.

The antifoaming agent may be used in an amount of 0.01 to 1% by weight based on the total weight of the coating composition. If the amount of the antifoaming agent is less than the above range, There is a tendency that flowability is lowered.

The hyperpolarizing agent is a component exhibiting a strong dispersing effect on a binder and fine sand, and is adsorbed on the surface of the substance in the surface activity characteristic. The hyperpolarizing agent forms a lubricating film on the particle sagging, And is used to exhibit improved flow characteristics.

If the amount is less than the above range, it is difficult to expect the effect of increasing the flowability of the coating composition. When the amount is used excessively in excess of the above range, There is a possibility that problems such as a decrease in stability and a delay in curing may occur.

The antimicrobial agent or antifungal agent can be used not only to improve the antimicrobial activity of the coating film formed by coating the coating composition but also to improve the antimicrobial properties of the coating film coated with the coating composition such as decay, odor, discoloration, and viscosity which may be caused by the growth of microorganisms such as bacteria or fungi Or the like, and it is known to those skilled in the art that a commonly used antimicrobial agent can be used without limitation.

It is preferable that the antibacterial agent or antifungal agent is contained in the coating composition within the range of 0.01 to 1% by weight. If the antibacterial agent or antibacterial agent is used within the above range, the antibacterial / antifungal property is not sufficiently expressed, It may not only affect the pH of the water-based paste in paste state, but may also cause cracks after curing the coating composition.

It is needless to say that the coating composition of the present invention may contain, in addition to the above-mentioned components, water as an aqueous solvent in a residual amount.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. It is to be understood that the following Examples and Experiments are only for the detailed description of the present invention and are not intended to limit the scope of the present invention.

Example

Each component was mixed with water with the composition shown in Table 1 below to prepare a coating composition.

Example 1 Example 2 Example 3 Example 4 Lime lime
480g 480g 480g 482 g Binder resin A 180g 210g 110g 180g B 50g 20g 120g 50g Titanium dioxide 180g 180g 180g 180g Zeolite 100g 100g 100g 100g Defoamer 3g 3g 3g 3g High dynamic range 3g 3g 3g 3g Potassium carbonate 2g 2g 2g - Antimicrobial agent 1g 1g 1g 1g Antifungal agent 1g 1g 1g 1g water 750 ml 750 ml 750 ml 750 ml A: ethylene vinyl acetate copolymer
B: Ethylene, vinyl laurate, vinyl chloride terpolymer

Experimental Example

The coating compositions prepared in Examples 1 to 4 were applied to Korea Institute of Construction & Living Environment Test and requested antibacterial / antifungal, VOC adsorption, and moisture absorptive and desorptive performance tests. Typical confirmation test results are shown in FIGS. 1 to 5 (It is difficult to disclose all of the plurality of test reports on the specification, so that only test reports for Example 1 are representatively disclosed).

The contents and results of each experiment were as follows.

Antibacterial Antifungal  Performance

The strains used for the confirmation antimicrobial properties Bacterial concentration (CFU / ml) 1.6 × 10 6 Escherichia coli (Escherichia coli ATCC 8739), and bacteria concentration (CFU / ml) 1.6 × 10 6 Staphylococcus aureus (Staphylococcus aureus ATCC 6538P of ), And the rate of bacterial reduction according to their growth was measured.

The fungus used for the identification of antifungal properties was Aspergillus niger ATCC 9642, which was subjected to a 3 week culture test.

Figs. 1 and 2 show test reports of the Korea Institute of Construction & Living Environment Test of Example 1. Fig.

VOC  Adsorption performance - Sick house syndrome Low sensitivity

Adsorption performance tests were conducted on formaldehyde (HCHO), a representative material of sick house syndrome, according to the conditions of Table 2 (adsorption chamber test conditions) and Table 3 (formaldehyde analysis conditions).

Absorption and desorption  Performance

Concrete specimens were subjected to one cycle moisture absorption and moisture proofing test under the following test conditions as shown in Table 4 below.

The result was the same as the adsorption / desorption graph shown in Fig.

Property test

The compositions of Examples 1 to 4 were applied to concrete walls and dried, and the formed coatings were tested according to the method of KS F 4715: 2007 measurement. Representatively, the test results of Example 1 were as shown in Table 5 below.

The test results of the entire Examples 1 to 4 are summarized as follows.

Item Test result How to measure Example 1 Example 2 Example 3 Example 4 Antimicrobial activity Escherichia coli 4.7 4.5 4.6 4.6 JIS Z 2801 Staphylococcus aureus 4.6 4.6 4.6 4.6 Antifungal 1.0 1.0 1.0 1.0 ASTM D 6329 Bond strength
(Standard) 1.3 N / mm < 2 & 1.3 N / mm < 2 & 0.7 N / mm < 2 & 1.3 N / mm < 2 & KS F 4715: 2007
Bond strength
(Maximum moisture absorption) 1.2 N / mm < 2 & 0.6 N / mm < 2 & 0.7 N / mm < 2 & 1.2 N / mm < 2 & 7 day HCHO adsorption rate 68.9 42.3 20.5 67.9 ISO 16000-23 Absorbing and desorbing amount average 71.5 60.5 40.1 71.2 ISO 24353: 2008 Application property good good good Poor Worker evaluation

Claims (6)

Slaked lime, a binder resin, and a functional additive,
Wherein the binder resin comprises ethylene / vinyl acetate copolymer: ethylene / vinyl laurate / vinyl chloride terpolymer in a weight ratio of 1: 0.1 to 1: 1. delete delete The eco-friendly multi-functional coating composition according to claim 1, wherein the binder resin further comprises at least one selected from the group consisting of kaolin, calcium carbonate, potassium carbonate and polyvinyl alcohol. The eco-friendly multi-functional coating composition according to claim 1, wherein the functional additive is at least one selected from the group consisting of titanium dioxide, zeolite, antifoaming agent, high dielectric constant agent, antimicrobial agent and antifungal agent. The eco-friendly multi-functional coating composition according to claim 1, which comprises 25 to 75 wt% of slaked lime, 5 to 30 wt% of a binder resin, and 0.01 to 35 wt% of a functional additive.

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