KR20150071941A - Method of forming dry paint film with native rock powder - Google Patents
Method of forming dry paint film with native rock powder Download PDFInfo
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- KR20150071941A KR20150071941A KR1020130159082A KR20130159082A KR20150071941A KR 20150071941 A KR20150071941 A KR 20150071941A KR 1020130159082 A KR1020130159082 A KR 1020130159082A KR 20130159082 A KR20130159082 A KR 20130159082A KR 20150071941 A KR20150071941 A KR 20150071941A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
Friendly multi-functional coating film excellent in antimicrobial property, deodorization property, far-infrared radiation property, heat resistance and corrosion resistance, and a method for forming the same.
The method for producing an environmentally friendly multifunctional coating film according to the present invention comprises the steps of: A) 50 to 70% of acrylic resin, B) 1 to 10% of aluminum, C) 3 to 10% of coloring agent, D) To 10%, E) 0.1-5% of an additive comprising at least one of a defoaming agent, a dispersant, a surfactant, an anti-settling agent, a light stabilizer, and a silicone compound, and F) a first coating composition comprising the remaining solvent and a volatile diluting solvent Applying the mixture to a laccase to form a primer layer; And on the undercoat layer, A) 1 to 1.2% of a photoinitiator, 10 to 15% of a urethane acrylate oligomer, 10 to 15% of an acrylate monomer, D) a defoaming agent, a dispersant, a surfactant, (E) 0.1 to 5% of an additive containing at least one of an antioxidant, a light stabilizer and a silicone compound; E) a methoxy melamine resin 2 to 10%, F) 1 to 3% of zirconia powder, % And H) of the second solvent is applied on the undercoat layer, followed by drying and UV curing to form a top coat layer.
Description
TECHNICAL FIELD The present invention relates to a technique for forming a coating film on the surfaces of automobiles, mobile devices, electronic products, cosmetic containers, building interior and exterior materials, and the like. More specifically, the present invention relates to a technology for producing far- Functional multi-functional coating film and a method for forming the same.
In general, coatings are formed by painting paints on building interior and exterior materials and automobile parts, which are formed of materials such as iron, concrete, wood, and cement. These coatings have been widely used as a means to protect the objects from external changes with aesthetic effects.
In addition, to prevent contamination of nonferrous metal or plastic materials, which are mainly applied to home appliances, mobile phones, and cosmetic containers, to increase chemical resistance such as resistance to solvents, .
The paint used for forming the coating film is generally a solvent-based paint using a large amount of a volatile organic solvent.
Oily paints are not only poisonous because they contain a large amount of volatile organic compounds but also require careful handling during handling due to the generation of toxic substances due to mixing, .
Background art related to the present invention is a pollution-free clay coating composition disclosed in Korean Patent Laid-Open Publication No. 10-2006-0109675 (published on October 22, 2006) and a method for producing the same.
It is an object of the present invention to provide a method of forming an environmentally friendly coating film.
Another object of the present invention is to provide an environmentally-friendly multi-functional coating film including far-infrared rays which are beneficial to the human body including natural stone pulverized material, and which are excellent in antibacterial property, deodorization property and corrosion resistance.
A method for forming an environmentally friendly multi-functional coating film according to an embodiment of the present invention includes the steps of: A) 50 to 70% of an acrylic resin, B) 1 to 10% of aluminum, C) 3 to 10%, D) 4 to 10% of natural stone pulverized products, E) 0.1 to 5% of an additive comprising at least one of a defoaming agent, a dispersing agent, a surfactant, an anti-settling agent, a light stabilizer, Applying a mixture obtained by mixing a first coating composition and a volatile diluting solvent to a lower layer to form a lower layer; And on the undercoat layer, A) 1 to 1.2% of a photoinitiator, 10 to 15% of a urethane acrylate oligomer, 10 to 15% of an acrylate monomer, D) a defoamer, a dispersant, a surfactant, E) a methoxy melamine resin 2 to 10%, F) zirconia powder 1 to 3%, G) a group III element-doped Zno powder 3 to 5, and an additive containing at least one of an antioxidant, % And H) of the second solvent is applied on the undercoat layer, followed by drying and UV curing to form a top coat layer.
At this time, the natural stone may include at least one of topaz, pomegranate, nacrite, saponaceae, Hae Ok, germanium ore, amethyst or elvan.
It is more preferable that the first coating composition further contains glass wool in an amount of not more than 15% by weight, and the second coating composition further contains glass wool in an amount of not more than 5% by weight.
In addition, the volatile diluent solvent may include at least one of a thinner, methyl ethyl ketone, cyclohexanone, and ethyl acetate.
The volatile diluting solvent is preferably mixed in an amount of 160 to 200 parts by weight based on 100 parts by weight of the first coating composition.
The solvent contained in the second coating composition may include at least 5 wt% of cellosolve solvent and at least 10 wt% of xylene based on the total weight of the second coating composition.
Also, it is preferable that the undercoat layer is formed to a thickness of 4 탆 to 8 탆, and the uppermost layer is formed to have a thickness of 15 탆 to 25 탆.
In order to accomplish the above object, the present invention provides an eco-friendly multi-functional coating film comprising 50 to 70% of an acrylic resin, 1 to 10% of aluminum, 3 to 10% of a coloring agent, D) From 0.1 to 5% of an additive comprising at least one of E) antifoaming agents, dispersants, surfactants, anti-settling agents, light stabilizers, silicone compounds and F) from the first coating composition consisting of the remaining solvent layer; And B) a urethane acrylate oligomer 10-15%, C) an acrylate monomer 10-15%, D) a defoaming agent, a dispersant, a surfactant, an anti-settling agent, a light stabilizer, a silicone E) methoxy melamine resin 2 to 10%, F) zirconia powder 1 to 3%, G) Group 3 element doped Zno powder 3 to 5%, and H) residual solvent And a top coat layer formed from the second coating composition.
According to the present invention, it is possible to provide a coated film containing a natural stone, which contains far-infrared rays beneficial to the human body, including natural stone powder as an environment-friendly material, and has excellent antibacterial and deodorizing properties. , Automobile parts, electric parts, general household articles, cosmetic containers, interior and exterior materials for buildings and the like.
In addition, the method for forming a coating film according to the present invention can easily form a primer layer by a lacquer coating method, and by forming a UV-curable top coat layer, it is possible to obtain an effect of improving surface hardness and improving gloss characteristics.
In addition, when the coating composition for forming a coating film according to the present invention contains a certain amount of glass wool, the effects such as scratch resistance and stain resistance of the coating film can be further improved.
Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
Hereinafter, a method for forming a natural-stone-containing coated film according to the present invention will be described in detail.
The eco-friendly multifunctional natural stone coating film according to the present invention comprises a primer layer and a primer layer formed thereon, wherein the primer layer is formed through lacquer application, and the primer layer is formed through UV curing.
Undercoating layer (first coating composition)
The undercoat layer is formed from an acrylic resin-based first coating composition having excellent adhesion between the substrate and the top coat layer. More specifically, the undercoat layer can be formed on the substrate using a lacquer coating method that is simple in construction. The substrate may be a variety of materials requiring a film formation such as a metal substrate, a polymer substrate, and a wood substrate.
In order to form a primer layer by a lacquer coating method, the first primer composition is diluted with a volatile diluting solvent, and the diluted resultant is applied by lacquer to form a primer layer. A volatile diluting solvent may be diluted during application of the lacquer, and further drying may be performed at about 50 to 80 ° C for about 30 seconds to 5 minutes in order to completely remove the solvent and volatile diluting solvent.
The first coating composition contains, by weight, A) 50 to 70% of an acrylic resin, B) 1 to 10% of aluminum, C) 3 to 10% of a coloring agent, D) 4 to 10% 0.1 to 5% of an additive comprising at least one of a surfactant, an anti-settling agent, a light stabilizer, and a silicone compound; and F) the remaining solvent.
The acrylic resin plays a role in improving the physical properties such as the adhesion of the paint, corrosion resistance, and workability.
The acrylic resin is preferably contained in an amount of 50 to 70% by weight based on the total weight of the first coating composition. When the content of the acrylic resin is less than 50% by weight, the effect is insufficient. On the other hand, when the content of the acrylic resin exceeds 70% by weight, the content of other components such as the natural stone crushed material is relatively decreased, so that the far-infrared radiation effect and the like may be insufficient.
Aluminum is added to improve the visual effect through the increase of gloss of the film. Aluminum may be included in the first coating composition in the form of a paste.
The aluminum is preferably added in an amount of 1 to 10% by weight based on the total weight of the first coating composition. When the addition amount of aluminum is less than 1% by weight, the effect of addition is insufficient. On the other hand, when the added amount of aluminum exceeds 10% by weight, the adhesion of the coating film may decrease, and the coating film formation cost may increase.
The coloring agent is included for imparting the color feeling upon formation of the coating film. As coloring agents, organic pigments, inorganic pigments and the like can be used.
The coloring agent is preferably added in an amount of 3 to 10% by weight based on the total weight of the first coating composition. When the content of the coloring agent is less than 3% by weight, the effect of the addition is insufficient. On the contrary, when the content of the coloring agent exceeds 10% by weight, other physical properties such as corrosion resistance may be deteriorated without further effect.
The natural stone crushed material is added for imparting far-infrared radiation activity, antibacterial property and deodorizing property of the coating film. Such a natural stone ground product may be ground to a particle size of about 10 to 200 nm.
The natural stone capable of exhibiting the above effect may include at least one of topaz, pomegranate, green star, blue sapphire, Hae Ok, germanium ore, amethyst and elvan. On the other hand, a charcoal powder may be used instead of the natural stone pulverized product.
Hereinafter, the efficacy of some of the natural stones will be introduced.
Germanium gemstones are known to have effects such as elimination of harmful oxygen, anti-cancer effect, improvement of menopausal disorder, liver disease, kidney disease alleviation, beauty action, activation of immune function and improvement of natural healing power. Germanium has the characteristic of releasing negative ions when the ambient temperature is above 32 ℃. It stimulates the blood circulation by activating the body current flowing in the body when it comes into contact with the human body, thereby relieving symptoms such as muscle lump, fatigue and pain. And the accumulation of fatigue substances can be suppressed, and the natural healing power inherent in human beings is enhanced. As a result, muscular fatigue that occurs during activities such as sports that use the body, relaxation of the muscles and joints accumulated in daily life, shoulder stiffness, back pain, nervous disorders, .
Topaz, pomegranate, and saplings contain minerals, calcium, and magnesium, which are extremely necessary for the human body. Among them, about 40% of magnesium, which is a constituent of chlorophyll, is contained. The cells constituting the human body are also made up of a large amount of magnesium, and the waves from the jade and the waves from the human body can be said to be the same waves. Therefore, the waves that emanate from the jade penetrate the human body cells uniformly, and resonance resonance action can be expected, and the effects such as tissue revival, circulation of heat, blood circulation, and excretion of harmful waste products in the body can be expected.
It is preferable that the natural stone pulverized material is added in an amount of 4 to 10% by weight based on the total weight of the first coating composition. If the natural stone crushed material contains less than 4% by weight, the above effects are insufficient. On the other hand, when the amount of the natural stone pulverized product is more than 10% by weight, workability and gloss decrease may occur.
The additive may be at least one of a defoaming agent, a dispersant, a surfactant, an anti-settling agent, a light stabilizer, a silicone additive, and the like which are generally added to the coating composition.
The additive is preferably contained in an amount of 0.1 to 5% by weight based on the total weight of the first coating composition. When the content of the additive is less than 0.1% by weight, the effect of the addition is insufficient. Conversely, if the content of the additive exceeds 5% by weight, excessive physical properties such as corrosion resistance may be deteriorated.
The solvent serves to disperse various components contained in the first coating composition, and to control the viscosity. In the case of a substance used as a solvent, there is no particular limitation, but it is more preferable to use a volatile diluting solvent such as methyl ethyl ketone, cyclohexanone, etc. in order to facilitate the lacquer application process and omit or minimize the drying time .
The volatile diluting solvent serves to enable the first coating composition to be applied by the lacquer application method.
Such a volatile diluting agent may include at least one of a thinner, methyl ethyl ketone, cyclohexanone, and ethyl acetate.
The volatile diluting solvent is preferably used in an amount of 160 to 200 parts by weight based on 100 parts by weight of the first coating composition, more preferably 170 to 180 parts by weight. When the volatile diluting solvent is used in an amount of less than 160 parts by weight, it may be difficult to apply the varnish. Even if the volatile diluting solvent is used in an amount exceeding 200 parts by weight, the effect of use thereof is not further increased, and the viscosity can be excessively lowered.
Top layer (second coating composition)
In the present invention, the top coat layer is formed through UV curing of the second coating composition, and more specifically, the second coating composition is applied on the undercoat layer to form a top coat layer, followed by drying and UV curing. The second coating composition may be applied by an air spray method, a screen printing coating method, or the like. The drying performed after application of the second coating composition may be performed at a temperature of about 60 to 80 DEG C for about 1 to 10 minutes, and a method such as forced hot air drying (BAKING BOOTH) may be used. The UV curing performed after drying can be carried out under UV irradiation conditions of approximately 800 to 1200 mJ / cm < 2 >.
The second coating composition comprises, by weight, (A) 1 to 1.2% of a photoinitiator, (B) 10 to 15% of a urethane acrylate oligomer, (C) 10 to 15% of an acrylate monomer, (D) antifoaming agent, dispersant, surfactant, (E) 0.1 to 5% of an additive containing at least one of a light stabilizer and a silicone compound, E) 2 to 10% of a methoxy melamine resin, F) 1 to 3% of zirconia powder, G) 3 to 5% H) remaining solvent.
Photoinitiators act as additives in the curing reaction during UV irradiation.
The photoinitiator may be a benzoin photoinitiator such as benzoin methyl ether, or a hydroxy ketone photoinitiator such as? -Hydroxy ketone.
The photoinitiator is preferably added in an amount of 1 to 1.2% by weight based on the total weight of the second coating composition. When the content of the photoinitiator is less than 1% by weight, the curing reaction time may become excessively long. On the other hand, when the content of the photoinitiator exceeds 1.2% by weight, a part of the photoinitiator may remain after the curing reaction, resulting in deterioration of the physical properties of the top layer.
The urethane acrylate oligomer is a main component of the second coating composition which determines the physical properties of the coating film.
The urethane acrylate oligomer is preferably contained in an amount of 10 to 15% by weight based on the total weight of the second coating composition. When the content of the urethane acrylate oligomer is less than 10% by weight, the adhesiveness and scratch resistance may be lowered. On the contrary, when the content of the urethane acrylate oligomer exceeds 15% by weight, the flexibility of the coating film may be lowered.
The acrylate monomer forms a cured structure by crosslinking or the like during curing, and contributes to improvement of workability. As the acrylate monomer, known acrylate monomers such as 2-ethylhexyl acrylate and octadecyl acrylate may be used without limitation.
The acrylate monomer is preferably added in an amount of 10 to 15% by weight based on the total weight of the second coating composition. When the content of the acrylate monomer is less than 10% by weight, the effect of the addition is insufficient. If the content of the acrylate monomer exceeds 15% by weight, solvent resistance and the like may be a problem.
The additive may be at least one of a defoaming agent, a dispersant, a surfactant, an anti-settling agent, a light stabilizer, a silicone additive, and the like which are generally added to the coating composition.
The additive may be added as an antifoaming agent, a dispersant, a surfactant, an anti-settling agent, a light stabilizer, a silicone additive, or the like, in an amount of 0.1 to 5% by weight based on the total weight of the second coating composition, .
The methoxy melamine resin serves to improve the curing properties, heat resistance and corrosion resistance of the coating film.
The methoxy melamine resin is preferably contained in an amount of 2 to 10% by weight based on the total weight of the second paint composition. If the content of the methoxy melamine resin is less than 2% by weight, the effect of the addition is insufficient. Conversely, if the content of the methoxy melamine resin exceeds 10% by weight, surface defects of the coating film may be a problem.
The zirconia powder contributes to the corrosion resistance and heat resistance of the coating film.
The zirconia powder is not particularly limited, but a nano powder having a particle size of about 50 to 100 nm may be used.
The zirconia powder is preferably contained in an amount of 1 to 3% by weight based on the total weight of the second coating composition. If the content of the zirconia powder is less than 1% by weight, the effect of the addition is insufficient, and if it exceeds 3% by weight, the adhesion of the coating film may be deteriorated.
Group 3 element doping ZnO powders serve to improve the heat resistance of the coating.
The Group 3 element doped with ZnO may be at least one of aluminum (Al), gallium (Ga), and indium (In).
The Group III element-doped ZnO powder is not particularly limited, but a powder having a particle diameter of about 50 to 500 nm may be used.
It is preferable that the Group 3 element-doped ZnO powder is contained in an amount of 3 to 5 wt% of the total weight of the second coating composition. When the content of the Group 3 element-doped ZnO powder is less than 3% by weight, the effect of the addition is insufficient. On the contrary, when the content of the Group 3 element-doped ZnO powder exceeds 5% by weight, the adhesion of the coating film may be deteriorated.
As the solvent contained in the second paint composition, known organic solvents may be used, and solvents or volatile diluting solvents included in the first paint composition may be used.
However, it is more preferable that the solvent includes at least one of cellosolve solvent and xylene.
Cellosolve solvents such as methyl cellosolve, ethyl cellosolve and butyl cellosolve can also serve as a solvent, but can contribute to improvement in workability and leveling effect. These can be used alone or in admixture of two or more. When the content of the second coating composition is 5 wt% or more, the above effects can be sufficiently exhibited.
Although xylene also acts as a solvent, it contributes to securing the smoothness of the coating film. When the xylene is added in an amount of 10% by weight or more based on the total weight of the second paint composition, the above effects can be sufficiently exhibited.
On the other hand, at least one of the first coating composition and the second coating composition may further include glass wool.
As a result of incorporating glass wool into the first coating composition or the second coating composition, the acid resistance and scratch resistance of the coating film can be improved. Also, in this case, the strength of the coating film can be improved, which can be attributed to the formation of a physical or chemical network between the glass wools or the glass wool and the resin.
When glass wool is included in the first coating composition, the content thereof is preferably 15% by weight or less based on the total weight of the first coating composition. When the glass wool is contained in the second coating composition, 5% by weight or less is preferable. When the glass wool content is out of the above-described range, the adhesion of the coating film is lowered, and the addition may be diluted.
Preferably, the undercoating layer is formed to a thickness of 4 탆 to 8 탆, and the uppermost layer is formed to a thickness of 15 탆 to 25 탆. The undercoating layer and the topcoating layer may be formed by applying a plurality of times. If the thickness of the undercoat layer is less than 4 mu m, the adhesion of the material is undesirable. If the thickness of the undercoat layer is more than 8 mu m, the physical properties are not deteriorated. On the other hand, when the thickness of the upper layer is less than 15 mu m, the change in gloss and the required physical properties are insufficient. When the thickness is more than 25 mu m, the physical properties are not deteriorated. However, it is difficult to form a uniform coating film.
Example
Hereinafter, a preferred embodiment will be described in order to facilitate understanding of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Example 1
Using the first coating composition and the second coating composition as shown in Table 1 below, a coating film according to Example 1 was formed in the following manner.
First, a mixture layer of a first coating composition and a thinner (100: 180 by weight) on a PET substrate was coated with Lacquer to form a primer layer having a thickness of about 5 탆. Thereafter, the second coating composition was coated on the primer layer, dried at 70 ° C for 5 minutes, and irradiated with UV at 1000 mJ / cm 2 to form a top layer having a thickness of about 20 μm.
[Table 1]
Example 2
Instead of the topaz powder, a granite powder (particle size: 20 to 50 nm) was used for the first coating composition,
A coating film was formed in the same manner as in Example 1, except that 3 wt% of glass wool (manufactured by Tae Kwang IND) was contained in the second coating composition and the content of isopropyl alcohol was 35 wt%.
[Performance evaluation]
The performances of the coating films formed according to Examples 1 and 2 were evaluated for the following items.
1) Appearance
It was judged by naked eyes and evaluated for discoloration, swelling and cracks.
As a result of the evaluation, neither discoloration, swelling nor cracking occurred in the coating films according to Examples 1 and 2.
2) Antimicrobial activity
The antimicrobial activity of Escherichia coli ATCC 25922 was examined as a test strain for coatings (4 cm x 4 cm) according to Examples 1 and 2 according to KICM-FIR-1004. The results are shown in Table 3 below .
[Table 2]
As shown in Table 2, the coating films according to Examples 1 and 2 exhibited a bacterial reduction rate of 99% or more and exhibited excellent antimicrobial activity.
3) Deodorizing property
Deodorization tests were carried out on the coated films (4 cm x 4 cm) prepared according to Examples 1 and 2 according to KICM-FIR-1085. Ammonia was used as the test gas and the gas concentration (ppm) was measured at the initial, 30 minutes, 60 minutes, 90 minutes, and 120 minutes using FR-IR. Deodorization test results are shown in Table 3 below.
[Table 3]
As shown in Table 3, in the case of the coating films according to Examples 1 and 2, the gas concentration was lowered with time, and deodorization was observed.
4) scratch resistance
In order to examine the scratch resistance of the coating films according to Examples 1 and 2, a scratch test according to JIS K 6718 was performed. As a result, scratches were not visually observed in both the coating film according to Example 1 and the coating film according to Example 2.
As a result of observation with a microscope, in the case of the coating film according to Example 1, microscopic scratch marks were found. However, no scratch marks were found in the case of the coating film according to Example 2 containing glass wool. In this case, it was found that the coating film according to Example 2 containing an appropriate amount of glass wool can exhibit excellent scratch resistance.
5) Tear strength
For the coating films according to Examples 1 and 2, the tearing strength was measured according to ASTM D 624, and the results are shown in Table 4.
[Table 4]
Referring to Table 4, in the case of the coating film according to Example 2 in which glass wool is contained in the upper layer, the tear strength is remarkably increased.
6) Heat resistance
The heat resistance was evaluated by whether or not cracks were formed on the surface of the coating film after the elapse of 96 hours in an oven at 180 ° C and whether or not peeling occurred.
As a result of evaluation of the heat resistance, no cracks were generated on the surface of the coating film in all of the coating films according to Example 1 and Example 2, and coating film peeling did not occur.
7) Thermal characteristics
The TSR (Total Solar Reflectance), which indicates the degree of reflection in the infrared region, was measured. When the TSR was more than 15%, the TSR was evaluated to be good.
The evaluation results of the heat-shrinkage characteristics are shown in Table 5.
[Table 5]
Referring to Table 5, the coating films according to Example 1 and Example 2 exhibited a high TSR value, which indicates that the heat shielding performance is excellent.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. These changes and modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.
Claims (3)
(A) 1 to 1.2% of a photoinitiator, (B) 10 to 15% of a urethane acrylate oligomer, (C) 10 to 15% of an acrylate monomer, D) a defoaming agent, a dispersant, a surfactant, E) methoxy melamine resin 2 to 10%, F) zirconia powder 1 to 3%, G) Group 3 element doped ZnO powder 3 to 5% And H) a second coating composition comprising the remaining solvent on the primer layer, followed by drying and UV curing to form a top coat layer.
The first coating composition may further contain glass wool in an amount of not more than 15% by weight,
Wherein the second coating material composition further comprises 5 wt% or less of glass wool.
Wherein the volatile diluting solvent is mixed in an amount of 160 to 200 parts by weight based on 100 parts by weight of the first coating composition.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020130159082A KR20150071941A (en) | 2013-12-19 | 2013-12-19 | Method of forming dry paint film with native rock powder |
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| KR1020130159082A KR20150071941A (en) | 2013-12-19 | 2013-12-19 | Method of forming dry paint film with native rock powder |
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| KR20150071941A true KR20150071941A (en) | 2015-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115717013A (en) * | 2022-12-23 | 2023-02-28 | 老虎表面技术新材料（清远）有限公司 | Transparent powder coating composition and coating thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115717013A (en) * | 2022-12-23 | 2023-02-28 | 老虎表面技术新材料（清远）有限公司 | Transparent powder coating composition and coating thereof |
| CN115717013B (en) * | 2022-12-23 | 2024-04-05 | 老虎表面技术新材料（清远）有限公司 | Transparent powder coating composition and coating thereof |
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