KR101458744B1 - Preparation method of coating material for protecting surface of steel and concrete structure, coating material prepared by the method, and construction method using the material - Google Patents

Abstract

The present invention relates to a method of preparing a coating material for surface protection of a steel material and a concrete structure, and a coating material prepared thereby, and more particularly, to a method of preparing a coating material for surface protection of a steel material and a concrete structure, the method characterized by preparing a modified unsaturated polyester resin, then preparing a thermal barrier component, and mixing the prepared modified unsaturated polyester resin and thermal barrier component with a crosslinking monomer, a metal salt hydroxide, and a ceramic powder mixture to prepare the coating material, and to a surface coating material of a steel material and a concrete structure prepared thereby. A coating material prepared by the method according to the present invention has excellent adhesion to a to-be-coated surface, also has excellent physical properties such as durability, weather resistance, water resistance, etc., may effectively block heat from outside from being transferred to a surface of a steel material, and in addition, has excellent deodorization, antibacterial, anti-fungal properties and emission effect of a far infrared ray and an anion, so the coating material has an excellent surface protection effect for a target structure and may provide excellent physical properties and various functionalities.

Description

[0001] The present invention relates to a method for producing a coating material for surface protection of steel and concrete structures, a coating agent prepared thereby, and a coating method using a coating material, material}

TECHNICAL FIELD The present invention relates to a method for manufacturing a coating agent for coating and protecting surfaces of steel and concrete structures, a coating agent prepared thereby, and a method of applying the coating agent. The present invention provides a method for coating a surface of a steel material and a concrete structure, To a technique for producing a functional coating agent.

In general, architectural structures, in particular steel or concrete construction structures, are not only durable after penetration, but also have reduced durability and service life. Especially, when built on the beach, it is often infiltrated with salt, and when it is built in factory wastewater area or sewage area, serious durability deteriorates due to penetration by various chemicals.

In order to prevent the durability of such an architectural structure from deteriorating, it is common to coat the surfaces of steel and concrete structures with a coating agent (coating).

Meanwhile, conventional coating materials for surface protection of steel and concrete structures have been used with fillers such as calcium carbonate, glass fiber, mica, silica, etc. These materials have been used only as ingredients for cost reduction and increase in the amount of paints. It has not played a role in imparting functionality together with improvement of adhesion, durability, and abrasion resistance.

On the other hand, Korean Patent Publication No. 2008-0094427 discloses a method for improving the adhesion to a conductor by using a blast furnace slag having high affinity for iron and cement as a filler, and by adding a soft resin such as acrylic or urethane resin, A technique has been proposed in which separation from the conductor surface is prevented to increase vibration resistance and alkali metal hydroxide is used as a curing agent to lower the curing rate, thereby improving the adhesion with the conductor.

In addition, Korean Patent No. 0937632 discloses a coating composition for a steel which is low in resistance to contamination, and a fluorine-based surfactant excellent in antistatic property and anti-dust adhesion property is added to the surface of a coating film, , And a technique for improving mildew resistance has been proposed.

As described above, the conventional techniques have been mainly studied mainly on techniques for improving the adhesion and durability of the coating film and the stain resistance. However, when used as an outdoor structure, the coating film should have excellent water resistance and weatherability. When used in an indoor structure, the generation of volatile organic compounds (VOCs) must be small and harmful components generated from the building structure are discharged into the structure, It is necessary to minimize harm. There has been no intensive study of imparting such characteristics in existing technologies. In some technologies, techniques have been proposed for imparting functions such as anion release and room air purification by adding materials such as loess, charcoal, and elvan to the paint, but in reality, Most of them were used mainly for interior decoration, and such functions have not been studied and developed in the technology for imparting the performance such as the surface protection of steel and concrete structures.

The present invention has been developed in consideration of the situation of the prior art as described above, and has a function of protecting the surfaces of steel and concrete structures, as well as adhesion and durability of the surface to be coated, and particularly excellent in weather resistance, water resistance and surface strength, It has long-term effect and can prevent deterioration of surface of steel and concrete structure by blocking heat transmitted from the outside. It absorbs toxic substances generated from coating material itself and concrete structure, A functional coating agent having functional effects such as blood circulation and metabolism promotion by generating a beneficial ingredient such as far-infrared rays and anion at the same time as a fungicidal action, and a coating agent prepared by this method.

In order to achieve the above object,

40 to 45% by weight of a polyhydric alcohol, 20 to 30% by weight of a saturated polybasic acid and 25 to 35% by weight of an unsaturated polybasic acid to obtain an intermediate;

The obtained intermediate is reacted with at least one amine compound selected from 1,3-diaminopropane, methylamine, ethylamine, dimethylamine, diethylamine, trimethylamine, ethylenediamine and diethylenetriamine to obtain amine- Obtaining a polyester resin;

Reacting the obtained amine-modified unsaturated polyester resin with dipentaerythritol polyacrylate and trimethylolpropane triacrylate to obtain a modified unsaturated polyester resin;

20 to 40% by weight of an acrylic emulsion resin comprising a copolymer of styrene and acrylic acid, 5 to 10% by weight of a water-soluble polyurethane resin, 1 to 10% by weight of a catalyst, 1 to 10% by weight of a water- Mixing 5 to 20% by weight of a heat exchange powder made of a spherical inorganic material surrounding the spherical polymer resin and 30 to 40% by weight of water to prepare a heat terminal component; And

To 100 parts by weight of the obtained modified unsaturated polyester resin, 1 to 10 parts by weight of the obtained heat terminal component, 10 to 35 parts by weight of a crosslinkable monomer, 0.1 to 10 parts by weight of a metal hydroxide, 30 to 50% To 40 wt% and 10 to 30 wt% of rhodium is mixed with 30 to 50 parts by weight of a ceramic powder mixture to obtain a composition

And a method for manufacturing a coating material for protecting a surface of a steel structure and a concrete structure.

In order to achieve the above object,

A steel material produced by the process according to the present invention, having a viscosity of 6-18 poise (25 ° C, Brookfield viscometer), a nonvolatile content of 75-85% and an acid value of 4-17 mgKOH / g, A coating agent for surface protection of concrete structures is provided.

The features and advantages of the method for manufacturing a coating material for surface protection of a steel material and a concrete structure according to the present invention and the coating agent produced thereby will be described below.

1. First, the adhesion between the coating agent (coating material) and the object surface of the building structure is high, and after the coated surface is not shrunk or deformed, the shape stability is excellent. Therefore, the surface protection of steel and concrete structures is excellent.

2. Also, it has an excellent weather resistance, water resistance and surface strength on the coated surface, effectively preventing the external heat from being transferred to the steel, and has an effect of prolonging the service life due to long use and deterioration due to the transfer of external heat.

3. By using porous ceramic powder mixture with excellent functional properties, it absorbs the harmful substances generated from the paint itself and the building structure, and has antimicrobial action and antifungal action, and at the same time, it is useful for the body such as far infrared ray and anion And has a functional effect such as blood circulation and promotion of metabolism.

Hereinafter, the present invention will be described in more detail.

The coating material for surface protection of steel and concrete structures according to the present invention is prepared in the following order. In other words

40 to 45% by weight of a polyhydric alcohol, 20 to 30% by weight of a saturated polybasic acid and 25 to 35% by weight of an unsaturated polybasic acid to obtain an intermediate;

The obtained intermediate is reacted with at least one amine compound selected from 1,3-diaminopropane, methylamine, ethylamine, dimethylamine, diethylamine, trimethylamine, ethylenediamine and diethylenetriamine to obtain amine- Obtaining a polyester resin;

Reacting the obtained amine-modified unsaturated polyester resin with dipentaerythritol polyacrylate and trimethylolpropane triacrylate to obtain a modified unsaturated polyester resin;

20 to 40% by weight of an acrylic emulsion resin comprising a copolymer of styrene and acrylic acid, 5 to 10% by weight of a water-soluble polyurethane resin, 1 to 10% by weight of a catalyst, 1 to 10% by weight of a water- Mixing 5 to 20% by weight of a heat exchange powder made of a spherical inorganic material surrounding the spherical polymer resin and 30 to 40% by weight of water to prepare a heat terminal component; And

To 100 parts by weight of the obtained modified unsaturated polyester resin, 1 to 10 parts by weight of the obtained heat terminal component, 10 to 35 parts by weight of a crosslinkable monomer, 0.1 to 10 parts by weight of a metal hydroxide, 30 to 50% To 40 wt% and 10 to 30 wt% of rhodium is mixed with 30 to 50 parts by weight of a ceramic powder mixture to obtain a composition

.

In the present invention, the modified unsaturated polyester is used as a subject and is manufactured in the following order. Namely, first, an intermediate is prepared by a condensation reaction between a polyhydric alcohol and a polybasic acid, and an amine-modified unsaturated polyester resin is prepared by reacting the intermediate thus prepared with an amine compound. Then, the amine-modified unsaturated polyester resin is reacted with dipentaerythritol Lithol polyacrylate and trimethylolpropane triacrylate to prepare a modified unsaturated polyester resin and mixing the modified unsaturated polyester with the crosslinkable monomer to use as a subject of the coating composition for surface protection of steel and concrete structures of the present invention do.

In the present invention, the polyhydric alcohol may be at least one selected from the group consisting of ethylene glycol, propylene glycol, 2-butyl-2-ethyl-1,3-propanediol, neopentyl glycol, 1,3-butylene glycol, Dihydroxy-2,2-dimethylpropyl ester, diethylene glycol, trimethylolethane, trimethylolpropane, glycerin, and the like can be used.

In the present invention, the polybasic acid uses a mixture of a saturated polybasic acid and an unsaturated polybasic acid. The saturated polybasic acid may be selected from the group consisting of methyl tetrahydrophthalic anhydride, phthalic acid, phthalic anhydride, phthalic anhydride, isophthalic acid, terephthalic acid, hexahydrophthalic acid, hexahydrophthalic anhydride, hexahydroterephthalic acid, hexahydroisophthalic acid, succinic acid, malonic acid, glutaric acid , Adipic acid, sebacic acid, 1,12-dodecane diacid, 2,6-naphthalene dicarboxylic acid, 2,7-naphthalene dicarboxylic acid, 2,3-naphthalene dicarboxylic acid, 2,3- Naphthalene dicarboxylic acid anhydride, and 4,4'-biphenyl dicarboxylic acid, or a mixture of two or more thereof. The unsaturated polybasic acid may be at least one selected from the group consisting of fumaric acid, maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, tetrahydrophthalic acid, anhydrous tetrahydrophthalic acid, tetrabromophthalic anhydride, tetrachlorophthalic anhydride, chlorendicacid, Any one or a mixture of two or more thereof selected from himic acid may be used.

In the present invention, the amine compound may be at least one compound selected from the group consisting of 1,3-diaminopropane, methylamine, ethylamine, dimethylamine, diethylamine, trimethylamine, ethylenediamine and diethylenetriamine. Can be used.

The dipentaerythritol polyacrylate used in the present invention may be selected from among dipentaerythritol pentaacrylate, dipentaerythritol diacrylate and dipentaerythritol hexaacrylate.

In the present invention, the intermediate obtained by the condensation reaction of the polyhydric alcohol and the polybasic acid is prepared by condensation reaction of 40 to 45% by weight of a polyhydric alcohol, 20 to 30% by weight of a saturated polybasic acid and 25 to 35% by weight of an unsaturated polybasic acid. In addition, by measuring the sample 60% IN SM per hour in the course of the reaction, the degree of reaction is confirmed and cooled to obtain an intermediate having a Gardner bubble viscosity of N to O and an acid value of 8 to 14 mg KOH / g.

When the intermediate is subjected to a condensation reaction, it is preferable to prevent gelation at a temperature in the range of 150 to 200 DEG C, and it is preferable that the base has a bubble viscosity of N to O and an acid value of 8 to 14 mgKOH / g in terms of dryness, water resistance and adhesion .

Subsequently, an amine-modified unsaturated polyester resin is synthesized by reacting 100 parts by weight of the synthesized intermediate with a reactant containing 0.1 to 10 parts by weight of an amine compound. If the amount of the amine compound is less than 0.1 part by weight, sufficient stability can not be imparted to the particles of the resulting modified unsaturated polyester resin, and there is a fear that a solidified product may be formed after the reaction. When the amount is more than 10 parts by weight, There is a fear that the water resistance is lowered and the cured coating film is fragile.

Subsequently, the synthesized amine-modified unsaturated polyester resin is polymerized with dipentaerythritol polyacrylate and trimethylolpropane triacrylate to prepare a modified unsaturated polyester resin. The amount of the dipentaerythritol polyacrylate is 0.1 to 5 parts by weight based on 100 parts by weight of the amine-modified unsaturated polyester resin, and 15 to 25 parts by weight of the trimethylolpropane triacrylate is added to the modified unsaturated polyester resin Can be manufactured. When the content of trimethylolpropane triacrylate is less than 15 parts by weight or more than 25 parts by weight when the modified unsaturated polyester resin is produced, weatherability and surface hardness may be lowered, and when the content of the pentaerythritol polyacrylate is less than 0.1 When the amount is less than 5 parts by weight, the crosslinking property is lowered and the surface hardness is lowered. When the amount is more than 5 parts by weight, weatherability and thixotropy may be lowered.

The modified unsaturated polyester resin thus prepared preferably has a viscosity of 3 to 9 Poise (25 ° C, Brookfield viscometer), a nonvolatile matter content of 80 to 90% and an acid value of 5 to 13 mm KOH / g. When the viscosity, the nonvolatile content and the acid value of the modified unsaturated polyester resin are within the above ranges, they are preferable in terms of surface hardness, curability, water resistance and thixotropy.

The thermal end components used to reduce the transfer of external heat to the surface of the steel and concrete structures will now be described.

In the present invention, the heat terminal component comprises 20 to 40% by weight of an acrylic emulsion resin comprising a copolymer of styrene and acrylic acid, 5 to 10% by weight of a water-soluble polyurethane resin, 1 to 10% by weight of a catalyst, 1 to 10% % And the inside are hollow spherical polymeric materials and the outer surface is prepared by mixing 5 to 20 wt% of heat exchange powder composed of a spherical inorganic material surrounding the spherical polymer resin and 30 to 40 wt% of water.

In the present invention, the acrylic emulsion resin may be a copolymer of acrylic acid, methacrylic acid, and styrene, and the surfactant may be mixed with the copolymer. Further, a polymer or a mixed polymer of methyl esters and ethyl esters of acrylic acid and acrylic acid can be used.

The optimal range of the acrylic emulsion resin is preferably 20 to 40% by weight.

The water-soluble polyurethane resin is prepared by addition polymerization of a diol (e.g., 1,4-butanediol) and a diisocyanate (e.g., diphenylmethane diisocyanate). As the diol, polyether diols such as polyethylene glycol and polypropylene glycol and aliphatic polyesters of terminal diol are used for rubber. In the present invention, the water-soluble polyurethane resin is a polyurethane of a thermoplastic resin, and a thermoplastic resin is used.

The water-soluble polyurethane resin is added in order to facilitate formation of a coating film when the coating material is applied, and the addition amount is preferably 5 to 10% by weight.

In the present invention, the catalyst is a metal compound containing cobalt or aluminum as a main component and acts to actively exchange heat by converting heat energy into kinetic energy by a heat end component, and the addition range is 1 to 10 wt% desirable.

In the present invention, the water-soluble rosin-modified water-soluble resin is a resin capable of increasing the water-repellent and heat-reducing effect of the coating film. The optimum range of addition is 1 to 10% by weight, and the water-soluble polyurethane resin and water- Plastics can be converted.

The heat exchange powder is composed of very fine spherical particles in the unit of μm, and the inside of the heat exchange powder is composed of a hollow polymeric material, that is, a thermoplastic resin, and the outer surface of the polymer material is surrounded by a spherical inorganic material In the polymer material having a hollow spherical shape, the exchange of heat is caused by the catalyst, and the spherical inorganic material on the outer surface of the polymer material assists the heat exchange movement while preventing wear and deterioration of the coating film.

The operation principle of the heat exchange powder according to the present invention is briefly described as follows. When the heat exchange powder is heated by receiving external heat, the hollow polymer material inside expands, but the inorganic material on the outer surface hardly expands, so that an expansion stress is generated in the polymer material. Inorganic materials which can be used at this time is preferably used that has a thermal expansion coefficient less than or equal to 20 × 10 ^-6 / ℃, for example but not limited to, Si, Cr, Fe, Mo, W, Pt, Ti, Ag, Au, Pt, Cu, or the like can be used. Subsequently, when the heating is continued, the polymer material in the interior is slightly deformed due to the expansion stress to open the thermal stress, and the slightly deformed inner polymer material generates a reaction force and the reaction force of the air to be expanded, Returning to the original shape, heat energy is converted into kinetic energy. Next, the polymer material returned to the circular shape is heated again to start expansion.

The coating material for surface protection of steel and concrete structures according to the present invention is prepared by mixing a crosslinkable monomer, a metal hydroxide and a ceramic powder mixture with the above-described modified unsaturated polyester resin and a heat insulating component.

In the present invention, the heat terminal component is preferably used in a range of 1 to 10 parts by weight based on 100 parts by weight of the modified unsaturated polyester resin.

The crosslinking monomer is preferably a reactive component which reacts with the modified unsaturated polyester resin, and the mixing ratio thereof is 10 to 35 parts by weight of the crosslinkable monomer relative to 100 parts by weight of the modified unsaturated polyester resin. When the content of the crosslinking monomer is less than 10 parts by weight, the surface hardness, heat resistance and curability are poor. When the amount is more than 35 parts by weight, the cured coating film tends to be fragile and adhesion and thixotropy may be poor.

In the present invention, the crosslinkable monomer may be selected from the group consisting of styrene, acrylonitrile, acryl imide, diacetone acryl imide, methyl acrylate, butyl methacrylate, lauryl methacrylate, acrylic acid, methyl methacrylate, It is preferably selected from butyl acrylate, ethyl methacrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, trimethylol propane triacrylate and hydroxypropyl acrylate Do.

In the present invention, metal hydroxide is used as a component for accelerating the curing of the above-mentioned main component. In the case of a paint (coating composition) composition using a conventional epoxy resin, polyamide or amines are used as a hardener. In this case, stress is high, hygroscopic property is high and flexibility is low, and adhesion with the surface is deteriorated with time, There arises a problem that it is difficult to ensure the long-term durability of the conductor as well as the paint itself due to a shortage of internal components that neutralize the acid component.

In the present invention, a modified unsaturated polyester resin is used without using an epoxy resin as a main component, and a metal hydroxide is used as a curing agent instead of an amine curing agent. Since the metal hydroxide hydroxide is hardened at room temperature, the hygroscopicity can be lowered and the water surface can be painted.

In addition, the metal hydroxide has a effect of chemically reacting with the surface to be treated, thereby further enhancing the adhesion strength and durability.

Examples of the metal hydroxide which can be used in the present invention include NaOH, KOH, Ca (OH) ₂ , and Mg (OH) ₂ .

The amount of the metal hydroxide used in the present invention is preferably in the range of 0.1 to 10 parts by weight based on 100 parts by weight of the modified unsaturated polyester resin.

The coating material for surface protection of steel and concrete structures according to the present invention may further comprise a ceramic powder to provide functionalities such as adsorption of harmful components and impartation of antimicrobial properties. The ceramic powder used in the present invention is a mixture of powders composed of quartz, talc, and talc. The amount of the ceramic powder is preferably in the range of 30 to 50 parts by weight based on 100 parts by weight of the modified unsaturated polyester resin. More preferably, the ceramic powder mixture has a powder size in the range of 0.01 to 10 mu m. The mixing ratio of each of the ceramic powder mixture is 30 to 50% by weight of quartz, 20 to 40% by weight of talcum, By weight to 30% by weight.

The above-mentioned quartzite, gypsum, and pearlsite are more excellent in the effect of releasing negative ions, improving the indoor air cleaning power and improving the health of the human body, as compared with the loess, charcoal, and elvan, which were used as conventional functional additives. However, There has never been a study to include.

The coating material for surface protection of steel and concrete structures of the present invention may further include conventional epoxy resins such as bisphenol A and bisphenol F epoxy resins in addition to the above components. The amount of the epoxy resin to be used is preferably small, It is preferably contained in an amount of 10 parts by weight or less based on 100 parts by weight of the unsaturated polyester resin. When the content of the epoxy resin exceeds 10 parts by weight, the effect of improving water resistance and weather resistance is not remarkable, and it is difficult to prevent the release of harmful components.

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The coating material for surface protection of steel and concrete structures obtained by the above production method according to the present invention has a viscosity of 6-18 poise (25 ° C, Brookfield viscometer), a nonvolatile content of 75-85%, an acid value of 4-17 mgKOH / g .

In addition, in the present invention, a soft resin may be further included to prevent separation of the coated surface and the coated surface during a long time. The soft resin enhances the flexibility of the coated surface and further improves the adhesion. As the soft resin to be used at this time, acrylic resin, methacrylic resin, urethane resin, phenoxy resin, styrene resin, natural rubber, SBR, NBR and the like can be used. To 5.0 parts by weight. The additive may further include various additives such as a dispersant, a thickener, a defoamer, a pigment, a pH adjuster, a cryoprotectant, an antiseptic, an antioxidant, and the like insofar as the effect of the present invention is not impaired. It is preferable that such additives are included in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the main component.

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The coating material for surface protection of steel and concrete structures according to the present invention is excellent in durability, water resistance, weather resistance and surface strength, excellent in heat shielding effect, excellent in far-infrared radiation and anion generation effect, and has antibacterial and anti- Since the ceramic powder is used, it is possible to suppress the toxicity of the paint, and it is also possible to remove the odor inside the room due to the antimicrobial activity, the far infrared ray and the anion effect, and to activate the metabolism of the human body.

The coating material for surface protection of steels and concrete structures according to the present invention is excellent in durability, weatherability, surface strength and water resistance enhancement effect and heat shielding effect only by a single coating, but in order to exhibit its function optimally, . In the present invention, the coating material for surface protection of steel and concrete structures is applied at 20 to 200 g / m ² , and the coating thickness is preferably applied at a thickness of 50 to 300 μm before the drying.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited by the following examples.

[Example]

(Production Example 1) Production of Modified Unsaturated Polyester Resin

682 g of neopentyl glycol and 493 g of isophthalic acid were placed in a 5-liter flask equipped with a stirrer, a thermometer, a condenser, a condenser and a bead decanter and a dropping funnel, and the mixture was heated to 165 DEG C over 2 hours in a nitrogen gas atmosphere . At this time, when the condensation water was generated while the esterification reaction proceeded, the condensed water was removed through the condenser line for 2 hours. After the condensed water was removed, the reaction mixture was re-introduced over 2 hours, and the mixture was gradually stirred and heated to react at 215 ° C. The solid acid value was measured by sampling every hour during the reaction, and when the solid acid value reached 2 mgKOH / g, the reaction was stopped and cooled to 100 ° C. At 100 DEG C, 114 g of propylene glycol and 544 g of fumaric acid were added in this order, and the temperature was raised to 165 DEG C over 2 hours in a nitrogen atmosphere. At this time, when the condensation water was generated as the esterification reaction proceeded, the condensed water was removed through the condenser line while maintaining the condensation water for 1 hour. After the condensation water was generated, the reaction mixture was reheated over a period of 3 hours, the temperature was raised to 215 캜, and the reaction was carried out. In the course of the reaction, the degree of reaction was determined by measuring 60% IN SM every hour. Gardner bubble viscosity N, acid value 11 mgKOH / g to obtain an intermediate. After removing the bead decanter from the flask, 79 g of 1,3-diaminopropane was added thereto after the addition of a dropping funnel, and the mixture was stabilized at 90 ° C to prepare an amine-modified unsaturated polyester resin. Thereafter, 59 g of dipentaerythritol hexaacrylate and 462 g of trimethylolpropane triacrylate prepared in advance were added to the dropping funnel, and the mixture was added dropwise for 2 hours with careful polymerization for ca. 6 poise, nonvolatile content 85%, acid value 9 67.7 g of a modified unsaturated polyester resin of mgKOH / g were synthesized.

(Production Example 2) Production of heat terminal component

30 parts by weight of an acrylic emulsion resin, 10 parts by weight of a water-soluble polyurethane resin, 5.0 parts by weight of a catalyst, 5.0 parts by weight of a water-soluble rosin-modified resin, 40 parts by weight of water and 10 parts by weight of a short-circuiting powder were uniformly mixed to obtain a heat shielding component.

(Production Example 3) Preparation of ceramic powder mixture

Among the natural manganese compounds from Mungyeong, Gyeongbuk Province, quartzite, calcareous stone and pearlite were pulverized, sieved to select only 0.01 ~ 10 ㎛ powder, and mixed at a weight ratio of 40:30:30 to obtain a ceramic powder mixture.

(Production Example 4) Preparation of coating agent

5.4 parts by weight of the heat terminal component obtained in Preparation Example 2 and 41.5 parts by weight of the ceramic powder mixture obtained in Preparation Example 3 were mixed with 100 parts by weight of the modified unsaturated polyester obtained in Preparation Example 1 and trimethylolpropane triacrylate 14.3 And 11.9 parts by weight of methyl methacrylate were mixed. 2.5 parts by weight of NaOH and 2.5 parts by weight of Ca (OH) _{2 were} uniformly mixed, and various additives were added thereto to prepare a coating agent.

(Production Example 5) Preparation of coating agent

5.4 parts by weight of the heat terminal component obtained in Preparation Example 2 and 41.5 parts by weight of the ceramic powder mixture obtained in Preparation Example 3 were mixed with 100 parts by weight of the modified unsaturated polyester obtained in Preparation Example 1 and trimethylolpropane triacrylate 14.3 And 11.9 parts by weight of methyl methacrylate were mixed. 2.5 parts by weight of NaOH and 2.5 parts by weight of Ca (OH) _{2 were} uniformly mixed, and then 5.0 parts by weight of bisphenol A and various additives were added to prepare a coating agent.

[Example 1]

The coating agent prepared in Preparation Example 4 was coated on the surface of the steel material twice with a thickness of 100 탆, followed by curing and drying to complete the surface protection work.

[Example 2]

The coating material prepared in Preparation Example 5 was coated on the surface of the steel material twice with a thickness of 100 탆 and cured and dried to complete the surface protection work.

[Comparative Example 1]

The same procedure as in Example 1 was carried out except that the surface of the steel material was coated using a commercially available ordinary epoxy resin coating agent (Sikafloor, 1004K).

Performance evaluation

1) Weatherability evaluation

ASTM G 155 for 400 hours.

2) Evaluation of surface hardness

The pencil hardness was measured according to KS D 6711.

3) Water resistance evaluation

The time at which surface deformation (cracks, blisters, etc.) occurred continuously in 90 ° C hot water was measured.

The evaluation results are shown in Table 1.

Weatherability (white) Surface hardness Water resistance Example 1 E1.2 4H 520hr Example 2 E0.9 3H 480 hr Comparative Example 1 ? E3.0 3H 360hr

As shown in Table 1, when the surface of the steel material and the concrete structure was coated using the coating agent according to the present invention, it was confirmed that the weather resistance, surface hardness and water resistance were remarkably superior to those of the conventional epoxy paint.

4) Deodorization test

In order to evaluate the ability of the interior of the building to remove various odors in the state of coating the coating agent according to the present invention, the ammonia water deodorizing ability test was carried out using the gas detection tube method. The test method was KICM-FIR-1085 and the deodorization test results of ammonia water according to the elapsed time are shown in Table 2.

time Deodorization rate (NH ₃ ) Example 1 Example 2 Comparative Example 1 0 minutes - - - 30 minutes 94.0 93.9 - 60 minutes 94.8 95.0 - 90 minutes 95.6 95.9 - 120 minutes 95.9 96.5 -

As can be seen from the above results, the coating agent according to the present invention exhibits excellent deodorizing effect and increases with time. However, in the case of Comparative Example 1, no deodorizing effect was observed.

5) Antifungal test

The fungus test was carried out using the method of ASTMG-21. The fungus strains were used as mixed strains of Aspergillus niger ATCC9642 and Peniclium pinophilum ATCC11797. The specimens used were 20 × 30 × 3 mm. After 4 weeks, no mold was found in the paint itself and a small amount of fungi were observed around the specimen. Accordingly, when the coating agent according to the present invention is applied, it can be confirmed that the coated surface has antifungal properties.

6) Antibacterial test

Escherichia coli 25922 and Pseudomonas aeruginosa ATCC 15442 were used as the fungi, and the antimicrobial test was conducted using KICM-FIR-1002 method using the coatings obtained in Production Example 4 and Production Example 5, The size of the specimen was 20 × 30 × 3 mm. The results for the antibacterial test are shown in Table 3.

Test Items Test result Production Example 4 Production Example 5 Initial concentration (CFU / 40p) After 24 hours concentration (CFU / 40p) Bacterial reduction rate (%) Initial concentration (CFU / 40p) After 24 hours concentration (CFU / 40p) Bacterial reduction rate (%) Antibacterial test against Escherichia coli blank 423 2500 - 423 2532 - sample 423 22 95 423 20 96 Antimicrobial test against Pseudomonas aeruginosa blank 433 2890 - 433 2950 - sample 433 410 0.3 433 412 0.2

From the above results, it was confirmed that when the coating agent according to the present invention was applied to Escherichia coli and Pseudomonas aeruginosa, the bacterium was reduced by 95% or more in the case of Escherichia coli and that the bacterial growth did not progress in the case of Pseudomonas aeruginosa.

7) Far Infrared Radiation and Radiation Intensity

The far infrared emissivity and the radiation intensity of the coating agent according to the present invention were tested using KICM-FIR-1005, and the results are shown in Table 4.

Test Items Test result Production Example 4 Production Example 5 Far Infrared Emission (40 ℃) Emissivity (5 to 20 탆) 0.943 0.945 Radiant energy 3.95 × 10 ² (W / m ² ) 3.99 × 10 ² (W / m ² )

8) Anion measurement

The anion release test method of the coating agent according to the present invention was carried out using KICM-FIR-1042, and the results are shown in Table 5.

Test Items Test result Production Example 4 Production Example 5 Anion (ION / cc) blank 75 75 sample 590 610

From the results of Table 4 and Table 5, it is expected that the coating agent according to the present invention can cope with a large amount of far-infrared ray which is beneficial to the human body, and at the same time, the amount of anion emission is large. Thus, coating of steel and concrete structures . In addition, due to the structural characteristics of the ceramic powder having a highly efficient far-infrared radiation effect, it has an effect of neutralizing the toxicity generated from the cement as well as having the function of controlling the humidity in the room.

From the above experimental results, it can be concluded that the coating material for protecting the steel material according to the present invention is excellent in adhesion with steel, excellent in properties such as durability, weather resistance and water resistance, excellent in deodorization / antibacterial / antifungal property and excellent in far- The surface protection effect of the steel material is excellent and various functionalities can be imparted.

Claims (6)

40 to 45% by weight of a polyhydric alcohol, 20 to 30% by weight of a saturated polybasic acid and 25 to 35% by weight of an unsaturated polybasic acid to obtain an intermediate;
The obtained intermediate is reacted with at least one amine compound selected from 1,3-diaminopropane, methylamine, ethylamine, dimethylamine, diethylamine, trimethylamine, ethylenediamine and diethylenetriamine to obtain amine- Obtaining a polyester resin;
Reacting the obtained amine-modified unsaturated polyester resin with dipentaerythritol polyacrylate and trimethylolpropane triacrylate to obtain a modified unsaturated polyester resin;
20 to 40% by weight of an acrylic emulsion resin comprising a copolymer of styrene and acrylic acid, 5 to 10% by weight of a water-soluble polyurethane resin, 1 to 10% by weight of a catalyst, 1 to 10% by weight of a water- Mixing 5 to 20% by weight of a heat exchange powder made of a spherical inorganic material surrounding the spherical polymer resin and 30 to 40% by weight of water to prepare a heat terminal component; And
To 100 parts by weight of the obtained modified unsaturated polyester resin, 1 to 10 parts by weight of the obtained heat terminal component, 10 to 35 parts by weight of a crosslinkable monomer, 0.1 to 10 parts by weight of a metal hydroxide, 30 to 50% To 40 wt% and 10 to 30 wt% of rhodium is mixed with 30 to 50 parts by weight of a ceramic powder mixture to obtain a composition
Wherein the coating composition is applied to a surface of a steel material and a concrete structure.
The method of claim 1, wherein the dipentaerythritol polyacrylate is selected from dipentaerythritol pentaacrylate, dipentaerythritol diacrylate, and dipentaerythritol hexaacrylate. A method for producing a surface protective coating agent.
[3] The method of claim 1, wherein the crosslinking monomer is selected from the group consisting of styrene, acrylonitrile, acrylic imide, diacetone acryl imide, methyl acrylate, butyl methacrylate, lauryl methacrylate, acrylic acid, methyl methacrylate, Acrylate, trimethylolpropane triacrylate, and hydroxypropyl acrylate, which is selected from the group consisting of butyl acrylate, butyl acrylate, ethyl methacrylate, glycidyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, Wherein the coating composition is applied to a surface of a steel material and a concrete structure.
The method according to claim 1, wherein the metal hydroxide is selected from the group consisting of NaOH, KOH, Ca (OH) _2, and Mg (OH) ₂ .
The method according to claim 1, wherein in the heat exchange powder, the polymer material is a thermoplastic polymer material, and the inorganic material has a thermal expansion coefficient of 20 x 10 < ^-6 >
And is characterized by having a viscosity of 6 to 18 poise (25 ° C, Brookfield viscometer), a nonvolatile content of 75 to 85% and an acid value of 4 to 17 mgKOH / g, which is manufactured by the method of any one of claims 1 to 5 Coatings for surface protection of steel and concrete structures.