KR101007507B1 - Anticorrosive coating composition for nonferrous metal and iron construction and method of anticorrosive coating using thereof - Google Patents

Abstract

PURPOSE: An anticorrosive coating composition is provided to improve durability and chemical resistance and to prevent corrosion of nonferrous metal and iron construction caused by acidic rain or sulfurous acid gas. CONSTITUTION: An anticorrosive coating composition for nonferrous metal and iron construction comprises 15-30 parts by weight of zinc or ferric oxide, 100.0 parts by weight of epoxy resin, 5 -20 parts by weight of polyglycidyl compound, 3-25 parts by weight of silica, 20-40 parts by weight of zirconium, 18-35 parts by weight of alumina, and 40-80 parts by weight of cycloaliphatic amine compound. The epoxy resin consists of a bisphenol F type epoxy resin, a novolac epoxy resin, a dimer fatty acid-modified epoxy resin and a silicate-modified epoxy resin.

Description

Anti-corrosive coating composition of non-ferrous metals and steel structures and anti-corrosive coating method using the same {ANTICORROSIVE COATING COMPOSITION FOR NONFERROUS METAL AND IRON CONSTRUCTION AND METHOD OF ANTICORROSIVE COATING USING THEREOF}

The present invention relates to an anticorrosive coating composition of non-ferrous metals and steel structures, and an anticorrosive coating method using the same, and more particularly, by mixing various epoxy resins and composite materials such as polygrisidyl compounds, silica and zirconium at an optimum ratio, Compared to the anti-corrosive coating, the non-ferrous metals and anti-corrosive coating composition of the non-ferrous metals and steel structures that can effectively prevent corrosion and erosion of the surface of the steel structure and the anticorrosive coating method using the same.

The surface of non-ferrous metals or steel structures was oxidized slowly due to corrosion or erosion, and thus the durability of the structures using them was lowered, resulting in a short lifespan. Accordingly, various methods of preventing corrosion and erosion by forming an anticorrosive coating film on the surface of a nonferrous metal or steel structure have been used.

Such conventional technologies include ester coating, acrylic coating, urethane coating, epoxy coating, fluororesin coating, organic / inorganic synthetic coating, and many products using the same.

However, the conventional technology has excellent physical properties of the product itself, but there is a problem of peeling or cracking by oxidizing or corroding the steel surface, and since the coating film is permeable or breathable, moisture penetrates the coating film and oxidizes the metal. have.

In addition, in the non-ferrous metal surface, the anticorrosive coating is wetted with the coating to exhibit adhesiveness, but there is a problem of peeling off due to the wetness. Therefore, there is a problem that the crack is generated or peeled off due to the absorption.

In addition, there is a problem that erosion or corrosion by oxidation due to poor weather resistance due to ultraviolet rays, there is a problem that promotes oxidation at high heat in the summer with low heat resistance. Due to the development of the industry, when exposed to various gases such as sulfurous acid gas or ammonia gas, there is a problem that the chemical resistance is oxidized, and there is a problem that cracks occur due to shrinkage when the temperature is kept below zero due to cold resistance.

Due to the problems of the conventional anticorrosive paint as described above, the durability of the structure is reduced, it is necessary to significantly improve the quality of such anticorrosive paint.

The present invention is to solve the above problems, an object of the present invention is to form a coating film using an anti-corrosive coating composition in which the composite material such as various epoxy resins and poly glycidyl compounds in the optimum ratio on the surface of the non-ferrous metal and steel structure In addition, the durability and chemical resistance are significantly improved to prevent corrosion and erosion of nonferrous metals and steel structures due to acid rain or sulfur dioxide.

In particular, the purpose of the present invention is to solve the problem that the coating surface does not get wet or cracks are generated at the welded area, the plated surface or the nonferrous metal surface.

In addition, by using the silica containing the thermal barrier material and the air layer, not only to prevent degradation, but also to increase the impact resistance, and the purpose of preventing peeling or swelling by increasing the flexibility of the anti-corrosive coating film through a plastic resin.

In addition, it is to improve the rust resistance through zinc or iron oxide powder, and to reduce static electricity through inorganic silicon resin, to prevent foreign substances such as dust attached to the coating film to increase the durability.

In addition, through the cycloaliphatic amine compound to increase the anti-aging properties, poly glycidyl compound to suppress the release of volatiles, environmentally friendly, to increase the film thickness to provide an anti-corrosive coating composition further improved durability. It is done.

In other words, by mixing various materials in an optimal ratio, the purpose is to significantly extend the durability of non-ferrous metals and steel structures to minimize maintenance costs.

The present invention is to solve the above problems, the anti-corrosive coating composition of the non-ferrous metal and steel structure according to the present invention, including zinc or iron oxide and epoxy resin, poly glycidyl compound, silica, zirconium, alumina and alicyclic amine compound The epoxy resin is made of a bisphenol F-type epoxy resin, a noblock epoxy resin, a dimer fatty acid (Dimer Fatty Acid) modified type epoxy resin and a silicate modified epoxy resin.

With respect to 100 parts by weight of the epoxy resin, 15 to 30 parts by weight of zinc or iron oxide, 5 to 20 parts by weight of the poly greyldil compound, 3 to 25 parts by weight of silica, 20 to 40 parts by weight of zirconium, The alumina is 18 to 35 parts by weight, the alicyclic amine compound is characterized in that it comprises 40 to 80 parts by weight.

In addition, the epoxy resin is 10 to 20% by weight of the bisphenol F-type epoxy resin, 20 to 30% by weight of the noblock epoxy resin, 25 to 35% by weight of the dimer fatty acid modified type epoxy resin, 30 to 45 of the silicate modified epoxy resin It comprises a weight percent.

The silica is in the form of fine powder containing air, the particle size is 1 to 10㎛, and further comprises silicon carbide and inorganic silicon resin, with respect to 100 parts by weight of the epoxy resin, the silicon carbide 10 to 20 parts by weight, the inorganic silicon resin is characterized in that it comprises 10 to 30 parts by weight.

In addition, the zinc and the iron oxide is in the form of a powder, the particle size is characterized in that 30 to 150㎛.

In addition, the anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metals and steel structures according to the present invention for achieving the above object, in the anti-corrosive coating method using the anti-corrosive coating composition of the non-ferrous metals and steel structures, zinc oxide or iron oxide and A primer coating step of coating a primer made of epoxy resin, silica, methylethylketone and toluene on the nonferrous metal or steel structure; After the primer coating, the first curing step of curing for 6 to 12 hours at 20 ℃ to 40 ℃; An anticorrosive coating step of coating the anticorrosive coating composition comprising zinc or iron oxide and an epoxy resin, a polygrisidyl compound, silica, zirconium, alumina and an alicyclic amine compound to the nonferrous metal or steel structure; After the anticorrosive coating composition coating, a second curing step of curing for 3 to 15 hours at 20 ℃ to 40 ℃; characterized in that it comprises a.

The anticorrosive coating step and the second curing step are repeated 2 to 4 times. In the primer coating step, the epoxy resin, bisphenol A type epoxy resin, dimer fatty acid (Dimer Fatty Acid) modified type epoxy Resin and silicate modified epoxy resin, characterized in that in the primer coating step, the primer, based on 100 parts by weight of the epoxy resin, the zinc oxide or iron oxide 30 to 100 parts by weight, the silica 20 to 80 parts by weight, the methyl ethyl ketone is 10 to 50 parts by weight, the toluene is characterized in that it comprises 70 to 130 parts by weight.

In addition, in the primer coating step, the epoxy resin, 25 to 50% by weight of the bisphenol A epoxy resin, 25 to 50% by weight of the dimer fatty acid modified type epoxy resin, 25 to 50% by weight of the silicate modified epoxy resin In the anticorrosive coating coating step, the anticorrosive coating composition is based on 100 parts by weight of the epoxy resin, 15 to 30 parts by weight of zinc or iron oxide, 5 to 20 of the poly greilyl compound By weight, the silica is 3 to 25 parts by weight, the zirconium is 20 to 40 parts by weight, the alumina is 18 to 35 parts by weight, the alicyclic amine compound is characterized in that it comprises 40 to 80 parts by weight.

In addition, in the anti-corrosive coating step, the epoxy resin, the bisphenol F-type epoxy resin 10 to 20% by weight, 20 to 30% by weight of the noblock epoxy resin, the dimer fatty acid modified type epoxy resin 25 to 35% by weight, The silicate-modified epoxy resin, characterized in that it comprises 30 to 45% by weight, in the primer coating step and the anticorrosive coating step, the primer and the anticorrosive coating composition is used 0.15kg / ㎡ to 0.4kg / ㎡ Characterized in that.

In addition, in the primer coating step and the anticorrosive coating step, the coating is characterized in that the injection is made in a pressure of 2000PSI to 3000PSI using an injector of 0.015mm to 0.020mm diameter.

The anticorrosive coating composition of the nonferrous metal and the steel structure according to the present invention and the anticorrosive coating method using the same are to solve the above problems, and the composite materials such as various epoxy resins and polygrisidyl compounds on the surface of the nonferrous metal and the iron structure in an optimal ratio. By forming a coating film using the mixed anticorrosive coating composition, the durability and chemical resistance is significantly improved, thereby preventing the non-ferrous metal and the steel structure from being corroded or eroded by acid rain or sulfur dioxide.

In particular, there is an advantage that can solve the problem that the coating surface is lifted or cracks due to the coating film is not wet at the welded, plated or non-ferrous metal surface.

In addition, by using the silica containing the thermal barrier material and the air layer, not only to prevent deterioration, but also to increase the impact resistance, there is an advantage that can prevent the peeling or swelling by increasing the flexibility of the anti-corrosive coating film through a plastic resin.

In addition, by improving the anti-rust properties through the zinc or iron oxide powder, by reducing the static electricity through the inorganic silicon resin, there is an advantage to increase the durability by preventing foreign substances such as dust to adhere to the coating film.

In addition, the cycloaliphatic amine compound to increase the anti-aging properties, poly glycidyl compounds through the suppression of the release of volatiles, environmentally friendly, there is an advantage that can increase the durability to further increase the film thickness.

That is, by mixing various materials in an optimal ratio, there is an advantage that can significantly extend the durability of the non-ferrous metals and steel structures to minimize the maintenance cost.

1 is a cross-sectional view showing the anti-corrosive coating film formed on the surface of the non-ferrous metal and steel structure using the anti-corrosive coating composition of the present invention
Figure 2 is a flow chart showing the anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure of the present invention in sequence

Hereinafter, the anticorrosive coating composition of the nonferrous metal and the steel structure according to the present invention and the anticorrosive coating method using the same will be described.

First, the anticorrosive coating composition of the nonferrous metal and the steel structure comprises zinc or iron oxide and epoxy resin, poly glycidyl compound, silica, zirconium, alumina and cycloaliphatic amine compound.

First, the characteristics of the constituents, roles, and contents of the epoxy resin in the anticorrosive coating composition of the nonferrous metal and the steel structure of the present invention will be examined.

The epoxy resin is composed of bisphenol F-type epoxy resin, noblock epoxy resin, dimer fatty acid (Dimer Fatty Acid) modified type epoxy resin and silicate modified epoxy resin.

Here, the epoxy equivalent of the epoxy resin is preferably 150 to 200 g / eq, more preferably 170 to 190 g / eq is most effective. If it is out of the above range, there is a problem that the physical properties of the epoxy resin is not exhibited, and the physical properties are lowered.

The bisphenol F type epoxy resin supplements the adhesion between the non-ferrous metal and the steel structure and the rust-proof coating film, and serves to enhance the chemical resistance and ozone resistance of the following Noble Epoxy resin, and other epoxy resins on the surface of the non-ferrous metal and the steel structure. It plays a role to make it smooth. The content is preferably 10 to 20% by weight in the epoxy resin, more preferably 13 to 16% by weight is most effective. If less than 10% by weight, there is a problem that the adhesion of the non-ferrous metals and steel structures and the rust-proof coating is weak, if more than 20% by weight, not only economic efficiency is lowered, but also there is a problem that the adhesion may be lowered.

In addition, the viscosity of the bisphenol F-type epoxy resin is preferably 8000 to 11000 CPS (Centi Poise), more preferably 9500 to 10500 CPS is most effective. If it is out of the above range, there is a problem in that the bisphenol F-type epoxy resin is not exhibited and the physical properties are lowered.

In addition, the noblock epoxy resin is not only a resin having excellent chemical resistance and heat resistance, but also excellent in acid resistance and alkali resistance to prevent oxidation or aging, and corrosion of nonferrous metals and steel structures by salt water at coasts or automobiles. In order to prevent corrosion due to sulfur dioxide or acid emitted from the factory, it has been adopted in the present invention.

The content is preferably 20 to 30% by weight in the epoxy resin, more preferably 24 to 27% by weight is most effective. If it is less than 20% by weight, there is a problem that the heat resistance and acid resistance is lowered, and when it exceeds 30% by weight, not only economic efficiency is lowered, but also there is a problem that the chemical resistance may be lowered. The viscosity of the noblock epoxy resin is preferably 25000 to 35000 CPS, more preferably 29000 to 31000 CPS is most effective. If it is out of the above range, there is a problem in that the properties of the noblock epoxy resin are not exhibited and the physical properties are lowered.

The dimer fatty acid modified type epoxy resin to form a coating film having a low elongation in conventional non-ferrous metals and steel structures with severe shrinkage and expansion according to temperature, to solve the problem of cracking or peeling, epoxy resin to dimer fatty acid through several experiments Is synthesized and added to the rust-preventive coating composition, which increases plasticity, imparts flexibility to the coating and maintains such properties for a long time, thereby preventing fatigue phenomenon due to seismic properties or impact, and employing the present invention. It became.

The content is preferably 25 to 35% by weight in the epoxy resin, more preferably 28 to 32% by weight is most effective. If it is less than 25% by weight, there is a problem that the flexibility is not sufficiently provided, if the amount exceeds 35% by weight, not only economic efficiency is lowered, but durability of the coating film is reduced due to excessive flexibility.

In addition, the silicate-modified epoxy resin does not adhere to the surface of the non-ferrous metals and steel structure anti-corrosive coating composition is raised to cause cracks and swelling, so that the surface of the non-ferrous metals and steel structure is oxidized to reduce the durability to solve the problem After several experiments, silicate-modified epoxy resins were synthesized by synthesizing silicate resins and epoxy resins to show optimum adhesion.

The content is preferably 30 to 45% by weight in the epoxy resin, more preferably 35 to 40% by weight is most effective. If it is less than 30% by weight, there is a problem that the adhesive strength is lowered, and if it exceeds 45% by weight, there is a problem that the economic efficiency is lowered.

Next, each of the meanings of the properties, roles, and contents of zinc or iron oxide in the anticorrosive coating composition of the nonferrous metal and the steel structure of the present invention will be examined.

The zinc or iron oxide is added to impart rust resistance to nonferrous metals and steel structures. This has the effect of significantly increasing the rust prevention effect. However, in order to maximize this effect, it is used in the form of powder as a result of several experiments, the particle size is preferably 30 to 150㎛, more preferably 40 to 70㎛ is most effective. If it is less than 30 μm, the reactivity is too large, the antirust effect is rather low, and if it exceeds 150 μm, there is a problem that the reaction does not occur and the antirust effect is reduced.

In addition, the content of zinc or iron oxide powder is preferably 15 to 30 parts by weight, more preferably 20 to 25 parts by weight based on 100 parts by weight of the total epoxy resin. When the amount is less than 15 parts by weight, the increase in the rust prevention effect is insignificant. When the amount is more than 30 parts by weight, economical efficiency is lowered, and durability and heat resistance are deteriorated.

Next, in the anticorrosive coating composition of the non-ferrous metals and steel structures of the present invention, the polygrisidyl compound is used as a diluent, which does not release volatiles, and serves to increase durability by increasing the thickness of the coating. Herein, the polyglycidyl compound may be any compound containing polyglycidyl, but in the present invention, it is most suitable to use a polyglycidyl ether compound.

The content of the polyglycidyl compound is preferably 5 to 20 parts by weight, and more preferably 10 to 15 parts by weight based on 100 parts by weight of the total epoxy resin. If it is less than 5 parts by weight does not play a role as a diluent, the durability improvement is insignificant, and if it exceeds 20 parts by weight, there is a problem that the overall physical properties of the rust-preventive coating film due to excessive dilution.

In the anti-ferrous metal and steel structure of the present invention, the silica (Silica) is preferably in the form of fine powder containing air, the size of the particles is preferably 1 to 10㎛, more preferably 3 to 6㎛ Most effective. The addition of silica in the form of fine powder includes air in the fine form to form an air layer between the grains to improve impact resistance, as well as excellent thermal barrier effect and excellent effect in preventing degradation.

Here, when the particle size is less than 1㎛, not only economic efficiency is low, but impact resistance and heat shielding effect is rather lowered, and when the particle size exceeds 10㎛, the formation effect of the air layer is lowered, so the thermal barrier effect is also lowered. have.

Zirconium in the anti-corrosive coating composition of the non-ferrous metals and steel structures of the present invention need to block the heat to prevent the oxidation or aging accelerated by the temperature of the surface of the non-ferrous metals and steel structures due to ultraviolet rays, etc., added for such thermal barrier do. The content of the zirconium is preferably 20 to 40 parts by weight, more preferably 25 to 30 parts by weight based on 100 parts by weight of the total epoxy resin. If it is less than 20 parts by weight, sufficient heat shielding is not performed. If it exceeds 40 parts by weight, economical efficiency is lowered, and there is a problem that overall physical properties are lowered by inhibiting the reaction of other components.

Alumina in the anti-corrosive coating composition of the non-ferrous metal and the steel structure of the present invention is added for the heat dissipation effect like the zirconium. The content of the alumina is preferably 18 to 35 parts by weight, more preferably 25 to 30 parts by weight based on 100 parts by weight of the total epoxy resin. If it is less than 18 parts by weight, a sufficient heat dissipation effect does not appear, and if it exceeds 35 parts by weight, economical efficiency is lowered, and there is a problem in that physical properties are generally lowered by inhibiting the reaction of other components.

The alicyclic amine compound in the anticorrosive coating composition of the nonferrous metal and the steel structure of the present invention serves as a hardening agent having excellent anti-aging properties from ultraviolet rays, thereby enhancing durability of the coating film by the anticorrosive coating composition of the nonferrous metal and the steel structure. The content of the cycloaliphatic amine compound is preferably 40 to 80 parts by weight, and more preferably 50 to 60 parts by weight based on 100 parts by weight of the total epoxy resin. If it is less than 40 parts by weight does not exhibit a sufficient anti-aging effect, if it exceeds 80 parts by weight is not only economically inferior, there is a disadvantage that the problem of cracking may occur rather than excessively hardened to lower the elongation.

The anti-corrosive coating composition of the non-ferrous metal and steel structure of the present invention preferably further comprises silicon carbide and inorganic silicon resin. Although not necessarily a substance to be added, by adding this, it is possible to further reinforce the physical properties of the antirust coating.

Here, silicon carbide serves to reduce heat through heat dissipation together with the zirconium, and inorganic silicon reduces static electricity generated from the surface of the coating film to prevent foreign substances such as dust from adhering to the coating film to reduce durability. Play a role.

The content of the silicon carbide is preferably 10 to 20 parts by weight, more preferably 13 to 16 parts by weight based on 100 parts by weight of the total epoxy resin. If less than 10 parts by weight does not exhibit a sufficient heat dissipation effect, if more than 20 parts by weight there is a problem of low economic efficiency.

In addition, the content of the inorganic silicon resin is preferably 10 to 30 parts by weight, more preferably 15 to 25 parts by weight with respect to 100 parts by weight of the total epoxy resin. If it is less than 10 parts by weight does not exhibit a sufficient electrostatic reduction effect, if it exceeds 30 parts by weight not only economic efficiency is lowered, but rather has a disadvantage in that the durability is reduced.

Figure 1 is a cross-sectional view of the non-ferrous metal and steel structure to form an anti-corrosive coating film using the anti-corrosive coating composition of the non-ferrous metal and steel structure of the present invention.

In the anticorrosive coating film forming method, first, the anti-corrosive primer is coated on the surface of the non-ferrous metal and the steel structure 10, and the anti-corrosive coating composition of the non-ferrous metal and the steel structure of the present invention is coated on the anti-rust primer layer 20. When the coating is dried, an anticorrosive coating layer 30 is formed. Finally, in order to protect the anticorrosive coating layer 30 from ultraviolet rays and various foreign substances on the anticorrosive coating layer 30, a ceramic material is applied using a roller or a spray. When the coating is dried for 30 minutes to 2 hours, the antifouling layer 40 is formed. The reason why the coating material of the ceramic material is applied is because it is most effective in the antifouling area to protect the anticorrosive coating layer 30 from the external environment because it has excellent weather resistance and chemical resistance.

Specific methods for forming the anticorrosive coating film will be described in the following anti-corrosive coating composition of the non-ferrous metals and steel structures and anticorrosive coating method using the same.

Next, an embodiment and a comparative example in which the physical properties of the coating film formed using the non-ferrous metal and the anticorrosive coating composition of the steel structure will be described.

Evaluation of anti-corrosive coating composition of nonferrous metals and steel structures is examined for adhesion, waterproofness, heat resistance, cold resistance, rust resistance, anti-aging, flexibility, impact resistance, pollution resistance, weather resistance, thermal barrier, acid resistance and alkali resistance.

Here, it is preferable to use an anticorrosive coating having excellent adhesion since the evaluation of adhesion needs to integrate the non-ferrous metal and the steel structure and the rustproof coating layer in order to maintain the complete rustproof coating and maintain the rustproof life for a long time.

In waterproof evaluation, it is preferable to use the anticorrosive coating excellent in waterproofness in order to prevent the penetration of moisture which accelerates corrosion resistance.

Heat resistance evaluation, since non-ferrous metals and steel structures are exposed to the external environment, if the surface temperature is increased by ultraviolet rays, it accelerates the oxidation or aging of the coating film, the thermal barrier performance of the coating film is an important evaluation factor, anti-corrosive paint with excellent heat resistance It is preferable to use. Thermal barrier evaluation It is also preferable to use anticorrosive coating having excellent thermal barrier for the same reason.

In the cold resistance evaluation, since the non-ferrous metal and the steel structure are exposed to the external environment, cracks may occur in a low temperature environment such as winter, so it is preferable to use an anticorrosive paint having excellent cold resistance.

Corrosion resistance evaluation is an evaluation regarding whether the base metal and nonferrous metals which are a base material are oxidized, and it is important for the performance of an antirust coating film, and it is preferable to use the coating material excellent in rust prevention property.

The anti-aging evaluation is a measure of how long the non-ferrous metals and steel structures, which are the parent, are exposed to ultraviolet rays and various climates so that aging proceeds. Therefore, it is preferable to use anticorrosive coatings having excellent anti-aging properties. Do.

In the evaluation of flexibility, it is preferable to use anticorrosive paint having excellent flexibility because the non-ferrous metals and steel structures, which are the parent, have a severe shrinkage and expansion according to the temperature, and the high hardness coating film is likely to crack or peel off.

Impact resistance evaluation is an evaluation of how to withstand the external impact, it is preferable to use an anti-corrosive coating excellent in impact resistance in non-ferrous metals and steel structures exposed to the external environment.

In the stain resistance evaluation, since non-ferrous metals and steel structures exposed to the outside may be contaminated with foreign substances such as dust, it is preferable to use an anticorrosive paint having excellent stain resistance.

The weather resistance evaluation is an evaluation of whether the non-ferrous metal and the steel structure is exposed by ultraviolet rays, so that it can endure it, and it is preferable to use an anticorrosive coating having excellent weather resistance.

Acid resistance evaluation is an evaluation of how much the coating film can withstand a strong acid, anti-corrosive coating film that is weak to acid is aging phenomenon caused by acid, it is preferable to use an anti-corrosive paint excellent in acid resistance.

The alkali resistance evaluation is an evaluation of how much the coating film can withstand strong alkali. Since the anti-corrosive coating film that is weak to alkalinity is caused by aging due to alkalinity, it is preferable to use an anticorrosive paint having excellent alkali resistance.

The evaluation method of the experimental example of this invention is as follows.

(Adhesiveness)

An anti-rust coating layer was formed on the surface of the nonferrous metal and the steel structure, and irradiated with ultraviolet rays for 5 days in the drying rack, and then examined for peeling phenomenon due to poor adhesion.

(Waterproof)

The antirust coating film layer was constituted, and water was poured on the coating film layer at 40 ° C., and then water permeation was examined.

(Heat resistance)

The anti-corrosion coating layer was constituted and kept at 100 ° C. for 10 minutes, and then examined for swelling and the like.

(Cold resistance)

The anti-corrosion coating layer was constituted and maintained at -25 ° C for 10 minutes, and then examined for cracks.

(Rustproof)

The oxidation of the mother was examined by exposure test for 168 hours at room temperature.

(Anti-Aging)

After the antirust coating layer was formed and exposed to strong ultraviolet light for about 5 hours, the aging phenomenon was examined.

(flexibility)

The anti-corrosion coating layer was constituted and cracks were examined while adjusting the temperature upward or downward from -25 ° C to 100 ° C.

(Impact resistance)

The anti-corrosion coating layer was formed, and the impact resistance test was conducted in accordance with ASTM D256 to examine the damage.

(Pollution resistance)

An antirust coating layer was formed, and the contamination state was measured by performing an exposure test exposed at room temperature for 500 hours.

(Weather resistance)

The anti-corrosion coating layer was composed and irradiated with strong ultraviolet rays for 120 hours using an ultraviolet irradiator to examine whether there was a change in yellowing.

(Heat shielding)

After the anti-corrosion coating layer was formed and heat was applied at 50 ° C. for 1 hour, the rate of temperature change on the surface of the nonferrous metal and the steel structure was measured.

(Acid resistance)

The anti-corrosion coating layer was formed, and it was immersed in 7% sulfuric acid for 500 hours and examined for swelling or cracking.

(Alkali resistance)

The anti-corrosive coating layer was formed, and it was immersed in 10% caustic soda for 500 hours, and then examined for color change or dissolution.

In this experiment, Example 1 used the anti-corrosive coating composition of the non-ferrous metal and steel structure of the present invention, Comparative Example 1 is an acrylic urethane paint, Comparative Example 2 is an alkyd coating film, Comparative Example 3 is a flame retardant epoxy containing metal powder As the coating material, Comparative Example 4, an acrylic fluorine paint was used. The comparative examples are products that are currently used as rust-preventive coatings on the market.

The experimental results are shown in Table 1 below. Here, the experimental results are divided into four stages of whether the results are excellent, good, normal, or poor in view of the evaluation criteria.

Experiment item Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Adhesive ◎ ○ ○ ○ ○ Waterproof ◎ Ｘ △ △ ○ Heat resistance ◎ ○ Ｘ ○ ○ Cold resistance ◎ ○ ○ Ｘ △ Antirust ◎ Ｘ ○ ○ △ Anti-aging ◎ ○ ◎ ○ ○ flexibility ◎ ◎ Ｘ Ｘ Ｘ Impact resistance ◎ ◎ △ Ｘ △ Pollution resistance ◎ △ △ △ Ｘ Weatherability ◎ △ Ｘ Ｘ ◎ Thermal insulation 90% 60% 50% 40% 50% Acid resistance ◎ △ Ｘ △ ○ Alkali resistance ◎ △ Ｘ △ ○

◎: excellent, ○: good, △: normal, Ｘ: poor

As shown in Table 1, it can be seen that Example 1 of the present invention has excellent physical properties in comparison with Comparative Examples 1 to 4, which are currently used rust-preventive coatings in all experimental items. That is, it can be seen that the performance improvement of the anti-corrosive coating composition of the nonferrous metal and the steel structure of the present invention is groundbreaking.

Experimental Example for Composition and Content of Anticorrosive Coating Composition of Non-Ferrous Metals and Steel Structures

In this experiment, the adhesion, flexibility, acid resistance, alkali resistance, weather resistance, anticorrosive properties of the anticorrosive coating composition of which various components and their contents were changed in order to find a composition having an optimal anti-rust condition. Experiments were conducted on fouling resistance, heat resistance, rust resistance and water resistance. The experimental results are shown in Table 2 below.

Example 1

With respect to 100 parts by weight of epoxy resin, 15 parts by weight of zinc powder, 10 parts by weight of poly greyldil compound, 30 parts by weight of zirconium, 20 parts by weight of alumina, 50 parts by weight of alicyclic amine compound, epoxy resin , Antirust coating composition comprising 10% by weight of bisphenol F-type epoxy resin, 30% by weight of noblock epoxy resin, 20% by weight of dimer fatty acid-modified epoxy resin, 40% by weight of silicate-modified epoxy resin

Example 2

100 parts by weight of epoxy resin, zinc powder 30 parts by weight, 20 parts by weight of the poly greyldil compound, 20 parts by weight of zirconium, 35 parts by weight of alumina, 80 parts by weight of the alicyclic amine compound, epoxy resin , 20 wt% bisphenol F type epoxy resin, 20 wt% noblock epoxy resin, 30 wt% dimer fatty acid modified type epoxy resin, 30 wt% silicate modified epoxy resin

Comparative Example 1

Except for the silicate-modified epoxy resin in Example 1, with respect to 100 parts by weight of epoxy resin, 5 parts by weight of zinc powder, 25 parts by weight of poly grease diyl compound, 10 parts by weight of zirconium, 40 parts by weight of alumina, alicyclic The amine compound includes 20 parts by weight, and the epoxy resin comprises 30% by weight of bisphenol F-type epoxy resin, 50% by weight of noblock epoxy resin, and 15% by weight of dimer fatty acid-modified type epoxy resin.

Comparative Example 2

Except for the noblock epoxy resin in Example 1, with respect to 100 parts by weight of the epoxy resin, 40 parts by weight of zinc powder, 35 parts by weight of poly grease diyl compound, 10 parts by weight of zirconium, 40 parts by weight of alumina, alicyclic system The amine compound includes 15 parts by weight, and the epoxy resin comprises 20% by weight of bisphenol F-type epoxy resin, 30% by weight of dimer fatty acid-modified epoxy resin, and 50% by weight of silicate-modified epoxy resin.

Comparative Example 3

100 parts by weight of epoxy resin, zinc powder 10 parts by weight, 5 parts by weight of the poly grease diyl compound, 5 parts by weight of zirconium, 15 parts by weight of alumina, 50 parts by weight of the alicyclic amine compound, epoxy resin Anti-corrosive coating composition comprising 40% by weight of bisphenol F-type epoxy resin, 20% by weight of noblock epoxy resin, 10% by weight of dimer fatty acid-modified epoxy resin, and 30% by weight of silicate-modified epoxy resin

Experiment item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Adhesive ◎ ◎ △ ○ ○ flexibility ◎ ◎ Ｘ △ ○ Acid resistance ◎ ○ ○ Ｘ ○ Alkali resistance ◎ ○ ○ ○ △ Weatherability ◎ ○ △ △ △ Pollution resistance ◎ ○ △ △ ○ Heat resistance ◎ ◎ △ Ｘ △ Antirust ◎ ◎ △ △ △ Water resistance ◎ ◎ ○ ○ ○

◎: excellent, ○: good, △: normal, Ｘ: poor

As shown in Table 2, in Examples 1 and 2, which are the scope of the present invention, the physical properties such as adhesion, flexibility, heat resistance, and rust resistance were all measured to be excellent or good, whereas the components of the present invention and In the case of Comparative Examples 1 to 3 outside the content range, most of the physical properties were determined to be normal or poor, so that each component of the present invention not only significantly affects the physical properties, but also has a critical significance. Has been proven.

Hereinafter, the anticorrosive coating method using the anticorrosive coating composition of the nonferrous metal and the steel structure according to the present invention will be described with reference to the drawings.

Figure 2 is a flow chart sequentially showing the anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure of the present invention.

As shown in Figure 2, the embodiment of the anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure according to the present invention, primer coating step (S10); First curing step (S20); Anticorrosive coating step (S30); It comprises a second curing step (S40).

Prior to primer coating step (S10) it is preferable to clean the surface of the non-ferrous metal or steel structure using a perforation, grinding machine, grinder, oil remover, torch lamp and the like.

Primer coating step (S10) is a step of coating a primer made of zinc oxide or iron oxide and epoxy resin, silica, methyl ethyl ketone (methylethylketone) and toluene on the non-ferrous metal or steel structure. This is a process of improving the rust resistance by increasing the adhesion between the anti-rust paint and the surface of the non-ferrous metal or steel structure.

In the primer coating step (S10), the epoxy resin is preferably made of bisphenol A epoxy resin, dimer fatty acid (Dimer Fatty Acid) modified type epoxy resin and silicate modified epoxy resin,

The primer is based on 100 parts by weight of the epoxy resin, 30 to 100 parts by weight of the zinc oxide or iron oxide, 20 to 80 parts by weight of the silica, 10 to 50 parts by weight of the methyl ethyl ketone, 70 to 70 parts by weight of the toluene It is preferable to include 130 parts by weight. When the component content of the primer is in the above range, the adhesion to the rust-preventive coating composition of the rust-preventive coating step (S30) is significantly improved and durability, as well as having a rust-proof function can effectively act as a primer, but If it is out of range, there is a problem that the adhesion or rust prevention function is reduced.

In addition, the epoxy resin is preferably made of 25 to 50% by weight of the bisphenol A epoxy resin, 25 to 50% by weight of the dimer fatty acid modified type epoxy resin, 25 to 50% by weight of the silicate-modified epoxy resin, If it is out of the content range, there is a problem that the durability and anti-rust function due to the decrease in adhesion to the anti-corrosive coating composition of the anti-corrosive coating step (S30) occurs.

The first curing step (S20) is a step of curing for 6 to 12 hours at 20 ℃ to 40 ℃ after the primer coating. This is to maximize the adhesiveness and rust prevention properties by appropriately curing the primer coating.

It is preferable that hardening temperature is 20 degreeC-40 degreeC, More preferably, it is effective that it is 23 degreeC-30 degreeC. If the temperature is less than 20 ° C, the curing time is long and economic efficiency is low, and there is a problem in that the adhesiveness is lowered due to poor curing. If the temperature is higher than 40 ° C, the curing rate is too fast at a high temperature. In addition to falling, there is a problem that the rust preventive properties are also reduced.

The curing time is preferably 6 hours to 12 hours, more preferably 8 hours to 10 hours. If less than 6 hours, there is a problem that the hardenability is not good, the adhesiveness is lowered, if more than 12 hours, not only the economic efficiency is lowered, but also the adhesiveness and rust-preventing properties are lowered due to excessive hardening.

Anticorrosive coating step (S30) is a step of coating the anti-corrosive coating composition comprising a zinc or iron oxide and an epoxy resin, a poly glycidyl compound, silica, zirconium, alumina and an alicyclic amine compound to the non-ferrous metal or steel structure. This is a process for not only improving the durability of nonferrous metals or ferrous structures using anticorrosive paints that are completely adhered to the primers, but also significantly improving the rust prevention properties.

Anticorrosive coating The specific components and content of the anticorrosive coating composition of the coating step (S30) is the same as the anticorrosive coating composition of the present invention, as described above.

The second curing step (S40) is a step of curing for 3 hours to 15 hours at 20 ℃ to 40 ℃ after the anticorrosive coating composition coating. This is to maximize the adhesiveness and rust prevention properties by appropriately curing the anticorrosive coating composition.

It is preferable that hardening temperature is 20 degreeC-40 degreeC, More preferably, it is effective that it is 23 degreeC-30 degreeC. If the temperature is less than 20 ° C, the curing time is long and economic efficiency is low, and there is a problem in that the adhesiveness is lowered due to poor curing. If the temperature is higher than 40 ° C, the curing rate is too fast at a high temperature. In addition to falling, there is a problem that the rust preventive properties are also reduced.

The curing time is preferably 3 hours to 15 hours, more preferably 4 hours to 12 hours. If less than 3 hours, there is a problem that the hardening is not good, the adhesiveness is lowered, if more than 15 hours, not only the economic efficiency is lowered, but also the adhesiveness and rust prevention properties are lowered due to excessive curing.

In particular, the hardening time is the most effective four times in the summer, 6 hours in the spring and autumn, 12 hours in the winter is the most effective.

Finally, after the second curing step (S40), in order to protect the anticorrosive coating film from ultraviolet rays and various foreign matters, a ceramic material is applied using a roller or a spray. After the coating is dried for 30 minutes to 2 hours, an antifouling layer is formed on the anticorrosive coating film. The reason why the coating of ceramic material is applied is that it is most effective for the anti-pollution area which protects the anticorrosive coating from the external environment because it has excellent weather resistance and chemical resistance.

In the primer coating step (S10) and the anticorrosive coating step (S30), the primer and the anticorrosive coating composition is preferably used from 0.15kg / ㎡ to 0.4kg / ㎡, more preferably 0.2kg / ㎡ To 0.3 kg / m 2, most preferably 0.25 kg / m 2.

If less than 0.15kg / ㎡ the coating layer is weak and not only the durability is lowered, but also the adhesion between the primer layer and the anticorrosive paint layer is weak, may cause cracks, and if it exceeds 0.4kg / ㎡ not only economic efficiency, but also excessive The thick paint layer is high risk of cracking, there is a problem that the overall process is delayed due to delay in curing time, etc. workability is also reduced.

In addition, the coating method in the primer coating step (S10) and the anticorrosive coating step (S30) may be any method, but the method of spraying at a pressure of 2000PSI to 3000PSI using an injector of 0.015 to 0.020mm diameter Most effective. If the diameter is less than 0.015mm, there is a problem that spraying is not performed smoothly due to the particle size of the primer and the material in the anticorrosive coating composition.If the diameter exceeds 0.020mm, the spraying pressure drops sharply and is not uniformly applied. There is. In addition, when the injection pressure is less than 2000PSI, there is a problem that the coating is not uniformly due to the viscosity of the injection material, when the injection pressure exceeds 3000PSI there is also a problem that can not be uniformly painted at an excessive pressure.

It is preferable to proceed in the order of the primer coating step (S10), the first curing step (S20), the anticorrosive coating step (S30), the second curing step, the anticorrosive coating step (S30) and the second curing step ( S40) is preferably repeated 2 to 4 times, more preferably twice is most effective. If the anticorrosive coating step (S30) and the second curing step (S40) is carried out only once, there is a problem that the anti-corrosion property is significantly lower than when the anti-corrosive coating is carried out twice. In the case of the highest, more than four times, there is a problem that the economic efficiency and efficiency is also reduced.

As mentioned above, the structure of this invention was demonstrated in detail with reference to an experimental example. However, the scope of the present invention is not limited to the above experimental examples, and may be embodied in various forms of experimental examples within the scope of the appended claims. Without departing from the gist of the invention as claimed in the claims, it is intended that such modifications can be made by anyone of ordinary skill in the art to be within the scope of the claims.

10: non-ferrous metals and steel structures
20: antirust primer layer
30: anticorrosive coating layer
40: antifouling layer

Claims (15)

Zinc or iron oxide and epoxy resin, poly glycidyl compound, silica, zirconium, alumina and cycloaliphatic amine compound, and the epoxy resin, bisphenol F-type epoxy resin, noblock epoxy resin, dimer fatty acid (Dimer Fatty Acid) modified Anticorrosive coating composition of a non-ferrous metal and steel structure, characterized in that consisting of the type epoxy resin and silicate modified epoxy resin.
The method of claim 1,
With respect to 100 parts by weight of the epoxy resin, 15 to 30 parts by weight of zinc or iron oxide, 5 to 20 parts by weight of the poly greyldil compound, 3 to 25 parts by weight of silica, 20 to 40 parts by weight of zirconium, The alumina is 18 to 35 parts by weight, the alicyclic amine compound is anticorrosive coating composition of the non-ferrous metal and steel structure, characterized in that it comprises 40 to 80 parts by weight.
3. The method according to claim 1 or 2,
The epoxy resin is 10 to 20% by weight of the bisphenol F-type epoxy resin, 20 to 30% by weight of the noblock epoxy resin, 25 to 35% by weight of the dimer fatty acid modified type epoxy resin, 30 to 45% by weight of the silicate modified epoxy resin Anticorrosive coating composition of a non-ferrous metal and steel structure, characterized in that comprises a.
3. The method according to claim 1 or 2,
The silica is in the form of fine powder containing air, the particle size of the anti-corrosive coating composition of the non-ferrous metal and steel structure, characterized in that 1 to 10㎛.
3. The method according to claim 1 or 2,
Further comprising silicon carbide and inorganic silicon resin, with respect to 100 parts by weight of the epoxy resin, the silicon carbide is 10 to 20 parts by weight, the inorganic silicon resin is characterized in that it comprises 10 to 30 parts by weight non-ferrous metal and Anticorrosive coating composition of steel structure.
3. The method according to claim 1 or 2,
The zinc and the iron oxide is in the form of a powder, the particle size of the anti-corrosive coating composition of the non-ferrous metal and steel structure, characterized in that 30 to 150㎛.
In the anticorrosive coating method using a non-ferrous metal and anticorrosive coating composition of the steel structure,
A primer coating step of coating a primer made of zinc oxide or iron oxide with an epoxy resin, silica, methylethylketone and toluene on the nonferrous metal or steel structure;
After the primer coating, the first curing step of curing for 6 to 12 hours at 20 ℃ to 40 ℃;
An anticorrosive coating step of coating the anticorrosive coating composition comprising zinc or iron oxide and an epoxy resin, a polygrisidyl compound, silica, zirconium, alumina and an alicyclic amine compound to the nonferrous metal or steel structure;
After coating the anticorrosive coating composition, a second curing step of curing 3 to 15 hours at 20 ℃ to 40 ℃; anticorrosive coating method using a non-ferrous metal and steel structure anticorrosive coating composition comprising a
The method of claim 7, wherein
The anticorrosive coating step and the second hardening step are anticorrosive coating method using the anticorrosive coating composition of the non-ferrous metal and steel structure, characterized in that it is repeated 2 to 4 times.
The method according to claim 7 or 8,
In the primer coating step, the epoxy resin is a bisphenol A epoxy resin, a dimer fatty acid (Dimer Fatty Acid) modified type epoxy resin and silicate modified epoxy resin, characterized in that the anticorrosive coating composition of the steel structure Painting method
The method according to claim 7 or 8,
In the primer coating step, the primer is based on 100 parts by weight of the epoxy resin, 30 to 100 parts by weight of the zinc oxide or iron oxide, 20 to 80 parts by weight of the silica, 10 to 50 parts by weight of the methyl ethyl ketone In addition, the toluene is anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure, characterized in that it comprises 70 to 130 parts by weight
The method of claim 9,
In the primer coating step, the epoxy resin, 25 to 50% by weight of the bisphenol A-type epoxy resin, 25 to 50% by weight of the dimer fatty acid modified type epoxy resin, including the silicate-modified epoxy resin 25 to 50% by weight Anticorrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure, characterized in that
The method according to claim 7 or 8,
In the anticorrosive coating step, the anticorrosive coating composition is based on 100 parts by weight of the epoxy resin, 15 to 30 parts by weight of zinc or iron oxide, 5 to 20 parts by weight of the poly greilyl compound, and 3 to 3 parts by weight of the silica. 25 parts by weight, the zirconium is 20 to 40 parts by weight, the alumina is 18 to 35 parts by weight, the alicyclic amine compound is characterized in that it comprises 40 to 80 parts by weight Painting method
The method according to claim 7 or 8,
In the anticorrosive coating step, the epoxy resin, 10 to 20% by weight of bisphenol F-type epoxy resin, 20 to 30% by weight of noblock epoxy resin, 25 to 35% by weight of dimer fatty acid-modified epoxy resin, silicate-modified epoxy resin 30 Anti-corrosive coating method using the anti-corrosive coating composition of the non-ferrous metal and steel structure, characterized in that comprises from 45% by weight
The method according to claim 7 or 8,
In the primer coating step and the anticorrosive coating step, the anticorrosive coating method using the anticorrosive coating composition of the non-ferrous metal and steel structure, characterized in that the primer and the anticorrosive coating composition is used 0.15kg / ㎡ to 0.4kg / ㎡
The method according to claim 7 or 8,
In the primer coating step and the anticorrosive coating step, the coating is performed by spraying at a pressure of 2000PSI to 3000PSI using an injector having a diameter of 0.015mm to 0.020mm, using the anticorrosive coating composition of the non-ferrous metal and the steel structure. Anticorrosion Painting

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