WO2016024653A1 - Pigment separable type aqueous paint composition mixed with plate-like zinc powder - Google Patents

Pigment separable type aqueous paint composition mixed with plate-like zinc powder Download PDF

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Publication number
WO2016024653A1
WO2016024653A1 PCT/KR2014/007559 KR2014007559W WO2016024653A1 WO 2016024653 A1 WO2016024653 A1 WO 2016024653A1 KR 2014007559 W KR2014007559 W KR 2014007559W WO 2016024653 A1 WO2016024653 A1 WO 2016024653A1
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zinc powder
pigment
plate
parts
weight
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PCT/KR2014/007559
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French (fr)
Korean (ko)
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전창일
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주식회사 켐프
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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
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
    • 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
    • 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
    • C09D7/80—Processes for incorporating ingredients

Definitions

  • the present invention relates to a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed. More particularly, the present invention relates to a pigment-based aqueous coating composition. As it is suitable for coating, it can be applied to parts of metal materials which are easily corroded by high temperature heat and corrosion conditions with various chemical characteristics such as structures such as metal refining plant and food chemical plant plant, or replace chromate treatment agent which is a post-treatment agent of hot dip galvanizing The present invention relates to a pigment-separable aqueous coating composition in which a plate-like zinc powder is mixed to form a film having excellent hardness, conductivity, and corrosion resistance by mixing plate-like zinc powder instead of spherical zinc powder.
  • metal materials applied to structures such as petroleum refining plants, metal refining plants, and food chemical plant plants are subjected to anticorrosive treatment in order to prevent corrosion of metal materials due to corrosion conditions having various chemical properties and high temperature heat.
  • the zinc powder coating containing a large amount of zinc powder is a coating using a negative electrode protection anticorrosive effect, and the subsequent coating is mainly a heavy anticorrosive coating.
  • the epoxy resin, deepoxy resin, and urethane paints are subsequently applied to promote long-term method and are widely applied in highly corrosive environment.
  • the inorganic zinc paint has excellent heat resistance as well as anticorrosive effect.
  • Zinc powder paint is a negative electrode principle.
  • Zinc metal generally has higher ionization tendency than iron, so when two metals coexist in electrolyte, a local battery is formed and electrons are transferred from zinc (anode) to iron (cathode). As the zinc flows and the zinc (anode) is corroded, iron (cathode) is protected and is a principle that shows anticorrosive properties.
  • the zinc powder (CAS NO 7440-66-6) used in the rust-preventive coating may react with water, and in particular, acids, bases, metals, oxidizing agents, reducing agents, halocarbon compounds, metal salts, halogens, combustible materials, and amines. Because it reacts easily with metal oxides and the like, attention is required not to mix with the above compounds.
  • Korean Patent Publication No. 1999-0050184 is a plate-shaped aluminum flake surface-coated with a spherical zinc powder and an organic solvent to reduce the surface wettability It is composed of a pigment mixed in a weight ratio of 1: 0.03 to 0.2, an inorganic silicate solvent and other necessary additives, and the mixing weight ratio of the pigment and the inorganic silicate solvent is 85:15 to 95: 5, and the particles of the zinc powder
  • the particle size of the plate-shaped aluminum flakes is 2 ⁇ 7 ⁇ m, the average length of 20 ⁇ 30 ⁇ width 5 ⁇ 10 ⁇ thickness 0.5 ⁇ m method and zinc-based inorganic paint with excellent heat dissipation, and domestic Patent No.
  • 10-0832147 A paint containing 60% by mass or more of zinc-based alloy powder in an arc, wherein the powder contains 10% by mass or more and less than 30% by mass of aluminum, with the balance being zinc and unavoidable impurities
  • a composition for the highly corrosion-resistant zinc-based alloy plated steel is proposed, wherein the powder is spherical or elliptical in shape, and the ratio of the maximum diameter to the minimum diameter (maximum diameter / minimum diameter) is 1 to 1.5.
  • the surface hardness of the coating may be low, the color of the coating may be lowered, and the electrical conductivity may be lowered when the zinc powder is added in an excessive amount.
  • pH high base
  • An object of the present invention is to use a plate-like zinc powder, the surface hardness is high, the color is not degraded, and even if added in excess of zinc powder provides a film that suppresses the degradation of the electrical conductivity, high temperature or high pH (high base)
  • a pigment-separable aqueous coating composition in which a plate-like zinc powder is mixed to provide a film that maintains physical properties by using a binder that does not degrade stability.
  • Another object of the present invention is a chromate treatment agent which is applied to a component of a metal material which is easily corroded by high temperature heat and corrosion conditions having various chemical properties such as structures such as metal refining plant and food chemical plant. It is possible to replace, and based on water to provide an environmentally friendly pigment-based aqueous coating composition.
  • Still another object of the present invention is to provide a pigment-separable water-based coating composition which, when applied to a conventional paint layer, improves the beautiful appearance and scratch prevention and anticorrosive effect.
  • An object of the present invention is achieved by providing a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed, which is formed by uniformly mixing an aqueous liquid binder and a plate-like zinc powder just before coating.
  • the pigment-like aqueous coating composition in which the plate-like zinc powder is mixed is made by mixing 100 parts by weight of the aqueous liquid binder and 30 to 40 parts by weight of the plate-like zinc powder.
  • the aqueous liquid binder is 100 parts by weight of purified water, 720 to 750 parts by weight of potassium silicate, 150 to 200 parts by weight of colloidal silica, 2 to 3 parts by weight of diutan gum, 10 to 30 water-soluble polyaniline It is supposed to consist of parts by weight and 2 to 3 parts by weight of octylphenol ethoxylate.
  • the plate-like zinc powder is 15 to 20 micrometers in length, 3 to 7 micrometers in width and 0.4 to 0.6 micrometers in thickness.
  • the plate-like zinc powder is used to form a film having high hardness and color without deterioration, and the reduction of electrical conductivity is suppressed even when the zinc powder is added in an excessive amount.
  • a binder that does not decrease the stability to exhibit an excellent effect of forming a film in which the physical properties are maintained.
  • FIG. 1 is a photograph showing a spherical zinc powder used in the prior art by scanning electron microscope.
  • Figure 2 is a photograph showing the plate-shaped zinc powder used in the present invention by electron scanning microscope.
  • Example 3 is a test report showing a result of performing a neutral saline spray test to the screw prepared in Example 2 of the present invention to the Korea Institute of Chemical Fusion Testing.
  • Example 4 is a test report showing a result of performing a neutral saline spray test to the screw prepared by Example 3 of the present invention to the Korea Testing and Research Institute.
  • the pigment-separated aqueous coating composition in which the plate-like zinc powder is mixed according to the present invention is formed by uniformly mixing the aqueous liquid binder and the plate-like zinc powder just before coating, and 100 parts by weight of the aqueous liquid binder and 30 to 40 parts by weight of the plate-like zinc powder. It is preferable to carry out mixing.
  • the aqueous coating composition having the above components is preferably packaged separately from the aqueous liquid binder containing potassium silicate as a main component in order to prevent deterioration of the zinc powder, and then mixed and used before coating.
  • the aqueous liquid binder is 100 parts by weight of purified water, 720 to 750 parts by weight of potassium silicate, 150 to 200 parts by weight of colloidal silica, 2 to 3 parts by weight of diutan gum, 10 to 30 parts by weight of water-soluble polyaniline and octylphenol It consists of 2-3 parts by weight of ethoxylate.
  • the purified water serves to disperse solids among the components constituting the pigment-separable aqueous coating composition in which the plate-like zinc powder according to the present invention is mixed, and when the mixing amount of the purified water is less than 100 parts by weight, the coating layer formed of the aqueous coating composition according to the present invention. If the thickness of the non-uniformity or workability is lowered, and the mixing amount of the purified water exceeds 100 parts by weight, the viscosity of the water-based coating composition according to the present invention is too low, the coating film layer is not formed properly.
  • distilled water from which various compounds or ions are removed in the water or deionized water that has passed through an ion exchange membrane so that the purified water does not generate a compound that reacts with a compound such as magnesium oxide or chromic acid contained in the water.
  • the potassium silicate is well diluted in purified water, and when purified water evaporates, it acts as an adhesive and a binder as a medium to fix the zinc powder on the metal surface, increases the tension of the surface of the coating layer, and makes the surface beautiful.
  • the mixing amount of the potassium silicate is less than 720 parts by weight, there is a fear that the adhesion of the coating film layer is lowered, and when the mixing amount of the potassium silicate exceeds 750 parts by weight, the amount of colloidal silica or purified water decreases as the amount of zinc decreases.
  • the binding property of the powder may be reduced or the paintability may be reduced.
  • the colloidal silica has a large number of OH- groups on its surface, and has siloxane bonds (Si-O-Si) inside, so it has properties such as bonding, heat resistance, film formation, and adsorption, and thus potassium silicate and
  • the action of binding to the zinc powder it is preferably mixed in 150 to 200 parts by weight based on 100 parts by weight of purified water.
  • the mixed amount of the colloidal silica is less than 150 parts by weight, the bondability with potassium silicate and zinc powder may be reduced, and when the mixed amount of the colloidal silica exceeds 200 parts by weight, the amount of the mixed water, such as purified water, is relatively small. As a result, workability may be degraded.
  • the diutan gum acts as a thickener to improve viscosity in the aqueous liquid binder.
  • the diutan gum exhibits stable physical properties under high temperature or high base and salt conditions, and is mixed in 2 to 3 parts by weight.
  • the content of the diutan gum is less than 2 parts by weight, the effect of improving the viscosity of the aqueous liquid binder is insignificant.
  • the content of the diutan gum is more than 3 parts by weight, the viscosity of the aqueous liquid binder is excessively improved to improve workability. This lowers and increases the manufacturing cost.
  • the water-soluble polyaniline serves to impart conductivity to the water-soluble liquid binder, and contains 10 to 30 parts by weight.
  • the content of the water-soluble polyaniline is less than 10 parts by weight, the effect of improving conductivity is minimal, and the content of the water-soluble polyaniline is Exceeding 30 parts by weight increases the manufacturing cost without significantly improving conductivity.
  • the octyl phenol ethoxylate serves as an antioxidant to prevent the oxidation of the aqueous liquid binder, it contains 2 to 3 parts by weight, if the mixed amount of octyl phenol ethoxylate is less than 2 parts by weight of the aqueous Colloidal silica and the like in the liquid binder composition may be oxidized.
  • the mixed amount of the octyl phenol ethoxylate exceeds 3 parts by weight, the effect of anti-oxidation is not greatly improved and the manufacturing cost is increased.
  • the plate-like zinc powder may react with water, and in particular, it is easily reacted with an acid, a base, a metal, an oxidizing agent, a reducing agent, a halo carbon compound, a metal salt, a halogen, a flammable substance, an amine, a metal oxide, and the like. Attention must be paid not to.
  • the aqueous coating composition according to the present invention is separated and packaged so that the zinc powder does not deteriorate in response to the water of the aqueous liquid binder in advance, thereby excellent in the characteristics of thermal oxidation or corrosion protection of metals such as steel, up to about 500 ° C. It is characterized by excellent heat resistance and corrosion resistance at high temperatures.
  • the plate-like zinc powder used in the present invention is a pigment having an anti-rust effect, in order to prevent the deterioration of the plate-like zinc powder should be separately packed from the aqueous liquid binder, the plate-like zinc powder 100 weight of the aqueous liquid binder It is preferable to mix 30 to 40 parts by weight with respect to the part.
  • the mixing amount of the plate-like zinc powder is less than 30 parts by weight, the plate-like zinc is formed inside the coating film layer when the aqueous coating composition according to the present invention is formed on the surface of the metal. Since the content of the powder is too small, the corrosion resistance may lower the corrosion resistance of the coating layer.
  • the content of the zinc panlate powder exceeds 40 parts by weight, the coating layer may be deteriorated because it is not homogeneously mixed with the aqueous liquid binder. Lifting from the metal may occur.
  • the plate-like zinc powder as shown in Figure 2 below, conventionally shows a plate-like, unlike spherical zinc powder, the length is 15 to 20 micrometers, the width is 3 to 7 micrometers, the thickness is 0.4 to 0.6 micrometers It is preferable that the meter be used, but the zinc phosphate powder exhibiting the particle size as described above is homogeneously dispersed in the aqueous liquid binder, thereby improving the corrosion resistance property.
  • the pigment-separated aqueous coating composition in which the plate-like zinc powder is mixed according to the present invention forms a film having a high hardness and does not deteriorate in color due to the use of the plate-like zinc powder, and deteriorates the electrical conductivity even when the zinc powder is added in an excessive amount. This is suppressed, and the binder which does not reduce stability even at high temperature or high pH (high base) is used, and shows the outstanding effect of forming the film in which a physical property is maintained.
  • a pigment-separable aqueous coating composition was prepared by mixing 35 parts by weight of a plate-like zinc powder having a length of 15 to 20 micrometers, a width of 3 to 7 micrometers, and a thickness of 0.4 to 0.6 micrometers.
  • aqueous liquid binder prepared by mixing 720 parts by weight of potassium silicate, 150 parts by weight of colloidal silica, 3 parts by weight of zitane gum and 2.5 parts by weight of octylphenolethoxylate Mixing to prepare a pigment-separable aqueous coating composition.
  • the pigment-removable aqueous coating composition prepared in Example 1 was applied to the surface of the screw with a thickness of 10 ⁇ m to prepare a screw coated with the pigment-dispersible aqueous coating composition.
  • the pigment-separated water-based coating composition prepared in Example 1 was further applied in a thickness of 10 ⁇ m A screw coated with an aqueous coating composition was prepared.
  • the pigment-separated aqueous coating composition prepared in Comparative Example 1 was applied to the surface of the screw with a thickness of 40 ⁇ m to prepare a screw coated with the pigment-separable aqueous coating composition.
  • the electrical conductivity was measured by applying the pigment separation-type aqueous coating composition prepared in Example 1 and Comparative Example 1 on the surface of the iron plate, divided into the upper, middle and lower portions, the test environment was a temperature of 24.5 °C Was measured at a humidity of 50 to 55%, and a resistance value ( ⁇ ) was measured using a Saehan ST850A multitester. ⁇
  • Example 1 of the present invention is superior in electrical conductivity to the pigment-separable aqueous coating composition prepared in Comparative Example 1.
  • Example 2 was commissioned by the Korea Institute of Chemical Convergence Testing and conducted a neutral saline spray test and the results are shown in Figure 3 below.
  • the screw manufactured through 2 of the present invention satisfies the result of 700 hours of neutral saline spray test despite the thickness of the coating film of the screw prepared through Comparative Example 2. It can be seen that it exhibits corrosion resistance.
  • Example 3 Example 3
  • Comparative Example 2 Comparative Example 2
  • the screw manufactured through Example 3 of the present invention satisfies the result of 1500 hours of neutral saline spray test, and showed excellent corrosion resistance compared to the screw prepared through Comparative Example 2. That is, it can be seen that the pigment-dispersible aqueous coating composition in which the plate-like zinc powder according to the present invention is mixed is applied to the top of the existing coating film to significantly improve the corrosion resistance of the existing coating film.
  • the present invention relates to a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed.
  • the present invention is excellent in thermal oxidation or corrosion protection of metals such as iron, and is suitable for coating metal materials subjected to high temperature heat up to about 500 ° C.
  • the plate-like zinc powder is mixed instead of the spherical zinc powder to form a pigment-like aqueous coating composition is mixed with a plate-like zinc powder to form a film with improved hardness, conductivity and corrosion resistance.

Abstract

The present invention relates to a pigment separable type aqueous paint composition mixed with a plate-like zinc powder and, more specifically, to a pigment separable type aqueous paint composition which is formed by homogeneously mixing an aqueous liquid binder and a plate-like zinc powder immediately before a coating operation. The pigment separable type aqueous paint composition composed of the above components has excellent characteristics for preventing thermal oxidation or corrosion of a metal material, such as iron, and thus is suitable in the coating of a metal material that undergoes high-temperature heat of up to 500°C, and therefore, can be applied to parts of a metal material, which are easily corroded by high-temperature heat and corrosion conditions with various types of chemical characteristics, for example, structures such as a metal purification plant and a food chemical factory plant. The pigment separable type aqueous paint composition may be substituted for a chromate treatment agent, which is a post-treatment agent of hot-dip galvanizing, and here, the composition forms a film with significantly improved hardness, conductivity, and corrosion resistance, by being mixed with a plate-like zinc powder instead of a spherical zinc powder.

Description

판상 아연분말이 혼합된 안료 분리형 수성도료 조성물Pigment separated water-based coating composition mixed with plate-like zinc powder
본 발명은 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물에 관한 것으로, 더욱 상세하게는 철재 등의 금속재의 열적 산화나 부식 방지의 특성이 우수하여 500℃ 정도까지의 고온의 열을 받는 금속 소재의 코팅에 적합하므로 금속 정제플랜트, 식품화학공장 플랜트 등과 같은 구조물과 같이 각종 화학적 특성을 가진 부식조건과 고온의 열에 의해 쉽게 부식되는 금속소재의 부품에 적용하거나 용융아연도금의 후처리제인 크로메이트 처리제를 대체할 수 있는 장점이 있으며, 구상의 아연분말 대신 판상의 아연분말이 혼합되어 경도, 전도성 및 내식성이 월등하게 향상된 피막을 형성하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물에 관한 것이다.The present invention relates to a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed. More particularly, the present invention relates to a pigment-based aqueous coating composition. As it is suitable for coating, it can be applied to parts of metal materials which are easily corroded by high temperature heat and corrosion conditions with various chemical characteristics such as structures such as metal refining plant and food chemical plant plant, or replace chromate treatment agent which is a post-treatment agent of hot dip galvanizing The present invention relates to a pigment-separable aqueous coating composition in which a plate-like zinc powder is mixed to form a film having excellent hardness, conductivity, and corrosion resistance by mixing plate-like zinc powder instead of spherical zinc powder.
일반적으로 석유 정제플랜트, 금속 정제플랜트, 식품화학공장 플랜트 등과 같은 구조물에 적용되는 금속소재는 각종 화학적 특성을 가진 부식조건과 고온의 열에 의해 쉽게 금속소재가 부식되므로 이를 방지하기 위하여 방식처리를 한다.In general, metal materials applied to structures such as petroleum refining plants, metal refining plants, and food chemical plant plants are subjected to anticorrosive treatment in order to prevent corrosion of metal materials due to corrosion conditions having various chemical properties and high temperature heat.
상기와 같은 경우 부식환경으로부터 구조물을 보호하기 위한 방안으로 다양한 부식방지법의 개발 등이 요구되고 있으며, 일반적인 금속 표면의 부식을 방지하기 위한 방법으로는 금속표면을 균일화 하고 부분적인 전위차를 적게하는 표면처리방법, 국부전지중 양극 또는 음극 중 어느 것 이든지 하나의 반응을 억제시키는 전기방식 및 금속표면에 전기저항이 높은 피막을 입히는 피막코팅법이 있으며, 이와같은 부식방지 이론에 따라 강재의 부식을 방지할 목적으로 도장하는 도료를 특히 방식 도료라고 한다. 각 플랜트에 사용되는 것은 플랜트의 종류 및 기능, 환경, 내구성등의 요인을 가미시킨 방식도료 선정, 도장법의 선택, 도장 시스템 선정이 이루어져서 도장설계가 되어야 한다.In the above cases, development of various corrosion prevention methods is required as a method for protecting a structure from a corrosive environment. As a method for preventing corrosion of a general metal surface, surface treatment is performed to uniformize the metal surface and reduce partial potential difference. Method, an electric method that suppresses one reaction in either the positive electrode or the negative electrode of the local battery, and the film coating method of coating a high electrical resistance film on the metal surface. The coating material coated for the purpose is especially called an anticorrosive paint. For each plant, the design should be made by selecting anti-corrosive paint, painting method, and painting system that have factors such as plant type and function, environment, and durability.
상기의 방법 중에서 아연분말을 다량으로 배합시킨 아연분말 도료는 음극 보호 방식 효과를 이용한 도료로 후속도장 도료는 주로 중 방식도료가 사용된다. 보통 에폭시 수지계, 탈에폭시수지계, 우레탄계 도료를 후속 도장하여 장기중방식을 도모하며 부식성이 심한 환경에 많이 적용된다. 특히, 무기 징크 페인트는 방식효과뿐만 아니라 내열성도 우수하다.In the above method, the zinc powder coating containing a large amount of zinc powder is a coating using a negative electrode protection anticorrosive effect, and the subsequent coating is mainly a heavy anticorrosive coating. In general, the epoxy resin, deepoxy resin, and urethane paints are subsequently applied to promote long-term method and are widely applied in highly corrosive environment. In particular, the inorganic zinc paint has excellent heat resistance as well as anticorrosive effect.
아연분말 도료는 음극 방식의 원리를 적용시킨 도료로서, 아연금속이 일반적으로 철보다 이온화 경향이 높아 두 금속이 전해질 속에 공존할 경우 국부 전지를 형성하여 전자가 아연(양극)에서 철(음극)로 흐르게 되고, 아연(양극)이 부식당함과 동시에 철(음극)은 보호를 받아 방식특성을 나타내는 원리이다.Zinc powder paint is a negative electrode principle. Zinc metal generally has higher ionization tendency than iron, so when two metals coexist in electrolyte, a local battery is formed and electrons are transferred from zinc (anode) to iron (cathode). As the zinc flows and the zinc (anode) is corroded, iron (cathode) is protected and is a principle that shows anticorrosive properties.
상기와 같이 방청도료에 사용하는 아연 분말(CAS NO 7440-66-6)은 물과 반응할 수도 있으며, 특히 산, 염기, 금속, 산화제, 환원제, 할로 탄소 화합물, 금속염, 할로겐, 가연성 물질, 아민, 금속 산화물 등과는 쉽게 반응을하므로 상기와 같은 화합물들과는 혼합을 하지않아야 하는 주의성이 요구되어지고 있다.As described above, the zinc powder (CAS NO 7440-66-6) used in the rust-preventive coating may react with water, and in particular, acids, bases, metals, oxidizing agents, reducing agents, halocarbon compounds, metal salts, halogens, combustible materials, and amines. Because it reacts easily with metal oxides and the like, attention is required not to mix with the above compounds.
한편, 상기와 같이 아연분말을 사용한 도료에 대한 기술들이 특허 출원된 현황을 살펴보면, 국내 공개특허공보 제1999-0050184호에 구형 아연 분말과 표면 젖음성을 저하시키는 유기 용제로 표면코팅된 판형 알루미늄 플레이크가 1:0.03~0.2의 중량비로 혼합된 안료와, 무기 실리케이트 용매 및 기타 필요로 하는 첨가제로 구성되고, 상기 안료와 무기 실리케이트 용매의 혼합 중량비는 85:15~95:5이며, 상기 아연 분말의 입자 크기는 2~7㎛이고, 상기 판형 알루미늄 플레이크의 입자 크기는 평균 길이 20~30×폭 5~10×두께 0.5㎛인 방식 및 방열성이 우수한 아연계 무기 도료와 그리고 국내 등록특허공보 제10-0832147호에 아연계 합금 분말을 60 질량% 이상 함유하는 도료로서, 상기 분말이 알루미늄을 10 질량% 이상 30 질량% 미만 포함하고, 잔부가 아연 및 불가피한 불순물로 이루어지는 조성으로서, 또한 상기 분말의 형상이 구상 또는 타원 구상이고 그 최대 지름과 최소 지름의 비(최대 지름/최소 지름)가 1 내지 1.5인 것을 특징으로 하는 고내식성 아연계 합금 도금 강재용 도료가 제안되어 있지만 상기와 같은 도료들의 경우에는 아연계 분말과 각종 첨가제 및 용매들이 혼합된 상태로 유통됨에 따라 아연 분말의 특성상 혼합된 각종 첨가제 및 용매들과의 반응으로 아연 분말의 방식성을 저하시키는 문제점이 발생할 가능성이 있었다.On the other hand, if you look at the current state of the patent applications of the coating technology using the zinc powder, Korean Patent Publication No. 1999-0050184 is a plate-shaped aluminum flake surface-coated with a spherical zinc powder and an organic solvent to reduce the surface wettability It is composed of a pigment mixed in a weight ratio of 1: 0.03 to 0.2, an inorganic silicate solvent and other necessary additives, and the mixing weight ratio of the pigment and the inorganic silicate solvent is 85:15 to 95: 5, and the particles of the zinc powder The particle size of the plate-shaped aluminum flakes is 2 ~ 7㎛, the average length of 20 ~ 30 × width 5 ~ 10 × thickness 0.5㎛ method and zinc-based inorganic paint with excellent heat dissipation, and domestic Patent No. 10-0832147 A paint containing 60% by mass or more of zinc-based alloy powder in an arc, wherein the powder contains 10% by mass or more and less than 30% by mass of aluminum, with the balance being zinc and unavoidable impurities In addition, a composition for the highly corrosion-resistant zinc-based alloy plated steel is proposed, wherein the powder is spherical or elliptical in shape, and the ratio of the maximum diameter to the minimum diameter (maximum diameter / minimum diameter) is 1 to 1.5. However, in the case of the paints as described above, as the zinc-based powder and various additives and solvents are distributed in a mixed state, a problem of deteriorating the corrosion resistance of the zinc powder may occur due to the reaction with various mixed additives and solvents due to the characteristics of the zinc powder. There was a possibility.
또한, 상기의 도료들은 구상의 아연분말이 사용되기 때문에, 피막의 표면경도가 낮고 피막의 색상이 저하될 수 있으며, 아연분말의 과량으로 첨가되었을 경우에 전기전도성이 저하될 수 있으며, 고온이나 높은 pH(고염기)에서는 바인더의 안정성이 저하되는 문제점이 있었다.In addition, since the above-described coatings are used in the form of spherical zinc powder, the surface hardness of the coating may be low, the color of the coating may be lowered, and the electrical conductivity may be lowered when the zinc powder is added in an excessive amount. At pH (high base), there was a problem in that the stability of the binder was lowered.
본 발명의 목적은 판상의 아연분말을 사용하여 표면경도가 높고 색상이 저하되지 않으며, 아연분말의 과량으로 첨가되어도 전기전도성의 저하현상이 억제되는 피막을 제공하며, 고온이나 높은 pH(고염기)에서도 안정성이 저하되지 않는 바인더가 사용되어 물성이 유지되는 피막을 제공하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물을 제공하는 것이다.An object of the present invention is to use a plate-like zinc powder, the surface hardness is high, the color is not degraded, and even if added in excess of zinc powder provides a film that suppresses the degradation of the electrical conductivity, high temperature or high pH (high base) To provide a pigment-separable aqueous coating composition in which a plate-like zinc powder is mixed to provide a film that maintains physical properties by using a binder that does not degrade stability.
본 발명의 다른 목적은 금속 정제플랜트, 식품화학공장 플랜트 등과 같은 구조물과 같이 각종 화학적 특성을 가진 부식조건과 고온의 열에 의해 쉽게 부식되는 금속소재의 부품에 적용하거나 용융아연도금의 후처리제인 크로메이트 처리제를 대체할 수 있으며, 물을 기반으로 하기 때문에 친환경적인 안료 분리형 수성도료 조성물을 제공하는 것이다.Another object of the present invention is a chromate treatment agent which is applied to a component of a metal material which is easily corroded by high temperature heat and corrosion conditions having various chemical properties such as structures such as metal refining plant and food chemical plant. It is possible to replace, and based on water to provide an environmentally friendly pigment-based aqueous coating composition.
본 발명의 또 다른 목적은 종래의 도료층에 상도로 적용되면, 미려한 외관 및 스크래치 방지 및 방식효과를 향상시키는 안료 분리형 수성도료 조성물을 제공하는 것이다.Still another object of the present invention is to provide a pigment-separable water-based coating composition which, when applied to a conventional paint layer, improves the beautiful appearance and scratch prevention and anticorrosive effect.
본 발명의 목적은 수성 액체 바인더와 판상 아연분말을 코팅작업 직전에 균일하게 혼합하여 이루어지는 것을 특징으로 하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물을 제공함에 의해 달성된다.An object of the present invention is achieved by providing a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed, which is formed by uniformly mixing an aqueous liquid binder and a plate-like zinc powder just before coating.
본 발명의 바람직한 특징에 따르면, 상기 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 수성 액체 바인더 100 중량부 및 판상 아연분말 30 내지 40 중량부를 혼합하여 이루어지는 것으로 한다.According to a preferred feature of the present invention, the pigment-like aqueous coating composition in which the plate-like zinc powder is mixed is made by mixing 100 parts by weight of the aqueous liquid binder and 30 to 40 parts by weight of the plate-like zinc powder.
본 발명의 더 바람직한 특징에 따르면, 상기 수성 액체 바인더는 정제수 100 중량부, 규산칼륨 720 내지 750 중량부, 콜로이달 실리카 150 내지 200 중량부, 디우탄검 2 내지 3 중량부, 수용성 폴리아닐린 10 내지 30 중량부 및 옥틸페놀 에톡시레이트 2 내지 3 중량부로 이루어지는 것으로 한다.According to a more preferred feature of the invention, the aqueous liquid binder is 100 parts by weight of purified water, 720 to 750 parts by weight of potassium silicate, 150 to 200 parts by weight of colloidal silica, 2 to 3 parts by weight of diutan gum, 10 to 30 water-soluble polyaniline It is supposed to consist of parts by weight and 2 to 3 parts by weight of octylphenol ethoxylate.
본 발명의 더욱 바람직한 특징에 따르면, 상기 판상 아연분말은 길이가 15 내지 20 마이크로미터이며, 폭이 3 내지 7 마이크로미터이고, 두께가 0.4 내지 0.6 마이크로미터인 것으로 한다.According to a further preferred feature of the present invention, the plate-like zinc powder is 15 to 20 micrometers in length, 3 to 7 micrometers in width and 0.4 to 0.6 micrometers in thickness.
본 발명에 따른 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 판상의 아연분말이 사용되어 경도가 높고 색상이 저하되지 않는 피막을 형성하며, 아연분말의 과량으로 첨가되어도 전기전도성의 저하현상이 억제되며, 고온이나 높은 pH(고염기)에서도 안정성이 저하되지 않는 바인더가 사용되어 물성이 유지되는 피막을 형성하는 탁월한 효과를 나타낸다.In the pigment-separable aqueous coating composition in which the plate-like zinc powder is mixed according to the present invention, the plate-like zinc powder is used to form a film having high hardness and color without deterioration, and the reduction of electrical conductivity is suppressed even when the zinc powder is added in an excessive amount. In addition, even at high temperature or high pH (high base) is used a binder that does not decrease the stability to exhibit an excellent effect of forming a film in which the physical properties are maintained.
또한, 금속 정제플랜트, 식품화학공장 플랜트 등과 같은 구조물과 같이 각종 화학적 특성을 가진 부식조건과 고온의 열에 의해 쉽게 부식되는 금속소재의 부품에 적용하거나 용융아연도금의 후처리제인 크로메이트 처리제를 대체할 수 있으며, 물을 기반으로 하기 때문에 친환경적인 피막을 형성하는 탁월한 효과를 나타낸다.In addition, it can be applied to parts of metal materials that are easily corroded by high temperature heat and corrosion conditions with various chemical properties such as structures such as metal refining plant and food chemical plant, or it can replace chromate treatment agent which is a post-treatment agent of hot dip galvanizing. And because it is based on water, it shows an excellent effect of forming an environmentally friendly film.
또한, 종래의 도료층에 상도로 적용되면, 미려한 외관 및 스크래치 방지 및 방식효과를 향상시키는 피막을 형성하는 탁월한 효과를 나타낸다.In addition, when applied to the coating layer of the prior art, it has an excellent effect of forming a film that improves the beautiful appearance and scratch prevention and anticorrosive effect.
도 1은 종래에 사용되는 구상 아연분말을 전자주사현미경으로 촬영하여 나타낸 사진이다.1 is a photograph showing a spherical zinc powder used in the prior art by scanning electron microscope.
도 2는 본 발명에 사용되는 판상 아연분말을 전자주사현미경으로 촬영하여 나타낸 사진이다.Figure 2 is a photograph showing the plate-shaped zinc powder used in the present invention by electron scanning microscope.
도 3은 본 발명의 실시예 2를 통해 제조된 나사를 한국화학융합시험연구원에 의뢰하여 중성염수분무시험을 실시하고 그 결과를 나타낸 시험성적서이다.3 is a test report showing a result of performing a neutral saline spray test to the screw prepared in Example 2 of the present invention to the Korea Institute of Chemical Fusion Testing.
도 4는 본 발명의 실시예 3을 통해 제조된 나사를 한국화학융합시험연구원에 의뢰하여 중성염수분무시험을 실시하고 그 결과를 나타낸 시험성적서이다.4 is a test report showing a result of performing a neutral saline spray test to the screw prepared by Example 3 of the present invention to the Korea Testing and Research Institute.
도 5는 본 발명의 비교예 2를 통해 제조된 나사를 한국화학융합시험연구원에 의뢰하여 중성염수분무시험을 실시하고 그 결과를 나타낸 시험성적서이다.5 is a test report showing a result of performing a neutral saline spray test to the screw prepared by Comparative Example 2 of the present invention to the Korea Testing and Research Institute.
이하에는, 본 발명의 바람직한 실시예와 각 성분의 물성을 상세하게 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는다.In the following, preferred embodiments of the present invention and the physical properties of each component will be described in detail, which is intended to explain in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.
본 발명에 따른 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 수성 액체 바인더와 판상 아연분말을 코팅작업 직전에 균일하게 혼합하여 이루어지는데, 수성 액체 바인더 100 중량부 및 판상 아연분말 30 내지 40 중량부를 혼합하여 이루어지는 것이 바람직하다.The pigment-separated aqueous coating composition in which the plate-like zinc powder is mixed according to the present invention is formed by uniformly mixing the aqueous liquid binder and the plate-like zinc powder just before coating, and 100 parts by weight of the aqueous liquid binder and 30 to 40 parts by weight of the plate-like zinc powder. It is preferable to carry out mixing.
본 발명의 특징에 의하면, 상기와 같은 구성성분을 갖는 수성도료 조성물은 아연 분말의 변질을 방지하기 위해 규산칼륨이 주성분인 수성 액체 바인더와 구분하여 별도로 포장한 다음 코팅작업 전에 혼합하여 사용하는 것이 바람직하다.According to a feature of the present invention, the aqueous coating composition having the above components is preferably packaged separately from the aqueous liquid binder containing potassium silicate as a main component in order to prevent deterioration of the zinc powder, and then mixed and used before coating. Do.
상기 수성 액체 바인더는 정제수 100 중량부, 규산칼륨 720 내지 750 중량부, 콜로이달 실리카 150 내지 200 중량부, 디우탄검(diutan gum) 2 내지 3 중량부, 수용성 폴리아닐린 10 내지 30 중량부 및 옥틸페놀 에톡시레이트 2 내지 3 중량부로 이루어진다.The aqueous liquid binder is 100 parts by weight of purified water, 720 to 750 parts by weight of potassium silicate, 150 to 200 parts by weight of colloidal silica, 2 to 3 parts by weight of diutan gum, 10 to 30 parts by weight of water-soluble polyaniline and octylphenol It consists of 2-3 parts by weight of ethoxylate.
상기 정제수는 본 발명에 따른 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물을 구성하는 성분 중 고형분을 분산시키는 역할을 하는데, 정제수의 혼합량이 100 중량부 미만이면 본 발명에 따른 수성도료 조성물로 형성된 피막층의 두께가 불균일하거나 또는 작업성이 저하되며, 상기 정제수의 혼합량이 100 중량부를 초과하게 되면 본 발명에 따른 수성도료 조성물의 점도가 지나치게 낮아져 코팅 피막층이 제대로 형성되지 않는다.The purified water serves to disperse solids among the components constituting the pigment-separable aqueous coating composition in which the plate-like zinc powder according to the present invention is mixed, and when the mixing amount of the purified water is less than 100 parts by weight, the coating layer formed of the aqueous coating composition according to the present invention. If the thickness of the non-uniformity or workability is lowered, and the mixing amount of the purified water exceeds 100 parts by weight, the viscosity of the water-based coating composition according to the present invention is too low, the coating film layer is not formed properly.
또한, 상기 정제수는 가능한 물 속에 함유된 산화마그네슘, 크롬산 등의 화합물과 반응하는 화합물이 발생하지 않도록 물속에 함유된 각종 화합물이나 이온들을 제거한 증류수나 또는 이온교환막을 거친 탈이온수를 사용하는 것이 바람직하다.In addition, it is preferable to use distilled water from which various compounds or ions are removed in the water or deionized water that has passed through an ion exchange membrane so that the purified water does not generate a compound that reacts with a compound such as magnesium oxide or chromic acid contained in the water. .
상기 규산칼륨(Potassium Silicate)은 정제수에 잘 희석되고, 정제수가 증발되면 아연분말을 금속 표면에 고정시키는 매개물로서 접착제 및 바인더의 작용을 하고, 코팅 도막층 표면의 장력을 증가시키고, 표면을 미려하게 만드는 열 저항력을 가지는 특성이 있는데, 정제수 100 중량부에 대해 720 내지 750 중량부로 혼합되는 것이 바람직하다.The potassium silicate is well diluted in purified water, and when purified water evaporates, it acts as an adhesive and a binder as a medium to fix the zinc powder on the metal surface, increases the tension of the surface of the coating layer, and makes the surface beautiful. There is a characteristic that has a heat resistance to make, it is preferably mixed in 720 to 750 parts by weight based on 100 parts by weight of purified water.
상기 규산칼륨의 혼합량이 720 중량부 미만인 경우에는 코팅 도막층의 접착력이 저하할 우려가 있고, 규산칼륨의 혼합량이 750 중량부를 초과하는 경우에는 상대적으로 콜로이달 실리카 또는 정제수의 혼합량이 적어짐에 따라 아연분말의 결합성이 저하하거나 도장 작업성이 저하될 수 있다.When the mixing amount of the potassium silicate is less than 720 parts by weight, there is a fear that the adhesion of the coating film layer is lowered, and when the mixing amount of the potassium silicate exceeds 750 parts by weight, the amount of colloidal silica or purified water decreases as the amount of zinc decreases. The binding property of the powder may be reduced or the paintability may be reduced.
상기 콜로이달 실리카(Colloidal Silica)는 표면에 다수의 OH-기를 갖고 있으며, 내부에는 실록산 결합(Si-O-Si)을 이루고 있으므로 결합성, 내열성, 조막성 및 흡착성 등의 특성이 있어 규산칼륨 및 아연분말과 결합하는 작용을 하는데, 정제수 100 중량부에 대해 150 내지 200 중량부로 혼합되는 것이 바람직하다.The colloidal silica has a large number of OH- groups on its surface, and has siloxane bonds (Si-O-Si) inside, so it has properties such as bonding, heat resistance, film formation, and adsorption, and thus potassium silicate and The action of binding to the zinc powder, it is preferably mixed in 150 to 200 parts by weight based on 100 parts by weight of purified water.
상기 콜로이달 실리카의 혼합량이 150 중량부 미만인 경우에는 규산칼륨 및 아연분말과의 결합성이 저하될 수 있으며, 상기 콜로이달 실리카의 혼합량이 200 중량부를 초과하는 경우에는 상대적으로 정제수 등의 혼합량이 적어짐에 따라 작업성등이 저하될 수 있다.When the mixed amount of the colloidal silica is less than 150 parts by weight, the bondability with potassium silicate and zinc powder may be reduced, and when the mixed amount of the colloidal silica exceeds 200 parts by weight, the amount of the mixed water, such as purified water, is relatively small. As a result, workability may be degraded.
상기 디우탄검은 상기 수성 액체 바인더에 점도를 향상시키는 증점제의 역할을 하는데, 종래에 사용되던 잔탄검(Xanthan gum)에 비해 고온이나 고염기 및 염의 조건에서 안정적인 물성을 나타내며 2 내지 3 중량부가 혼합되는데, 상기 디우탄검의 함량이 2 중량부 미만이면 수성 액체 바인더의 점도를 향상시키는 효과가 미미하며, 상기 디우탄검의 함량이 3 중량부를 초과하게 되면 수성 액체 바인더의 점도가 지나치게 향상되어 작업성이 저하되며 제조비용을 증가시키게 된다.The diutan gum acts as a thickener to improve viscosity in the aqueous liquid binder. Compared to the conventional Xanthan gum, the diutan gum exhibits stable physical properties under high temperature or high base and salt conditions, and is mixed in 2 to 3 parts by weight. When the content of the diutan gum is less than 2 parts by weight, the effect of improving the viscosity of the aqueous liquid binder is insignificant. When the content of the diutan gum is more than 3 parts by weight, the viscosity of the aqueous liquid binder is excessively improved to improve workability. This lowers and increases the manufacturing cost.
상기 수용성 폴리아닐린은 상기 수용성 액체 바인더에 전도성을 부여하는 역할을 하며, 10 내지 30 중량부가 함유되는데, 상기 수용성 폴리아닐린의 함량이 10 중량부 미만이면 전도성의 향상효과가 미미하며, 상기 수용성 폴리아닐린의 함량이 30 중량부를 초과하게 되면 전도성은 크게 향상되지 않으면서 제조비용을 증가시키게 된다.The water-soluble polyaniline serves to impart conductivity to the water-soluble liquid binder, and contains 10 to 30 parts by weight. When the content of the water-soluble polyaniline is less than 10 parts by weight, the effect of improving conductivity is minimal, and the content of the water-soluble polyaniline is Exceeding 30 parts by weight increases the manufacturing cost without significantly improving conductivity.
상기 옥틸페놀에톡시레이트(Octyl Phenol Ethoxylate)는 수성 액체 바인더 의 산화를 방지하는 산화방지제의 역할을 하며, 2 내지 3 중량부가 함유되는데, 상기 옥틸페놀에톡시레이트의 혼합량이 2 중량부 미만이면 수성 액체 바인더 조성물 내의 콜로이달 실리카 등이 산화될 수 있으며, 상기 옥틸페놀에톡시레이트의 혼합량이 3 중량부를 초과하게 되면 산화방지의 효과는 크게 향상되지 않으면서 제조비용을 증가시키게 된다.The octyl phenol ethoxylate (Octyl Phenol Ethoxylate) serves as an antioxidant to prevent the oxidation of the aqueous liquid binder, it contains 2 to 3 parts by weight, if the mixed amount of octyl phenol ethoxylate is less than 2 parts by weight of the aqueous Colloidal silica and the like in the liquid binder composition may be oxidized. When the mixed amount of the octyl phenol ethoxylate exceeds 3 parts by weight, the effect of anti-oxidation is not greatly improved and the manufacturing cost is increased.
상기 판상 아연분말은 물과 반응할 수도 있으며, 특히 산, 염기, 금속, 산화제, 환원제, 할로 탄소 화합물, 금속염, 할로겐, 가연성 물질, 아민 및 금속 산화물 등과는 쉽게 반응을 하므로 상기와 같은 화합물들과는 혼합을 하지않아야 하는 주의성이 요구되어지고 있다.The plate-like zinc powder may react with water, and in particular, it is easily reacted with an acid, a base, a metal, an oxidizing agent, a reducing agent, a halo carbon compound, a metal salt, a halogen, a flammable substance, an amine, a metal oxide, and the like. Attention must be paid not to.
따라서, 본 발명에 따른 수성도료 조성물은 아연분말이 수성 액체 바인더의 물과 사전에 반응하여 변질되지 않도록 분리하여 포장함으로써, 철재 등의 금속재의 열적 산화나 부식 방지의 특성이 우수하여 500℃ 정도까지의 고온에서 내열성과 내식성이 우수한 것이 특징이다.Therefore, the aqueous coating composition according to the present invention is separated and packaged so that the zinc powder does not deteriorate in response to the water of the aqueous liquid binder in advance, thereby excellent in the characteristics of thermal oxidation or corrosion protection of metals such as steel, up to about 500 ° C. It is characterized by excellent heat resistance and corrosion resistance at high temperatures.
또한, 본 발명에 사용되는 판상 아연분말은 방청효과를 나타내는 안료로서, 판상 아연분말의 변질을 방지하기 위하여 수성 액체 바인더와는 분리하여 별도 포장을 해야 하며, 상기 판상 아연분말은 수성 액체 바인더 100 중량부에 대해 30 내지 40 중량부가 혼합되는 것이 바람직한데, 상기 판상 아연분말의 혼합량이 30 중량부 미만인 경우에는 본 발명에 따른 수성도료 조성물을 금속의 표면에 형성되하는 경우에 코팅 피막층의 내부에 판상 아연분말의 함유량이 너무 적어 내식성이 피막층의 내식성이 저하될 수 있으며, 상기 판산 아연분말의 함량이 40 중량부를 초과하게 되면 수성 액체 바인더와의 균질하게 혼합되지 않아 피막층의 접착력이 저하되기 때문에, 피막층이 금속으로부터 들뜸는 현상이 발생할 수 있다.In addition, the plate-like zinc powder used in the present invention is a pigment having an anti-rust effect, in order to prevent the deterioration of the plate-like zinc powder should be separately packed from the aqueous liquid binder, the plate-like zinc powder 100 weight of the aqueous liquid binder It is preferable to mix 30 to 40 parts by weight with respect to the part. When the mixing amount of the plate-like zinc powder is less than 30 parts by weight, the plate-like zinc is formed inside the coating film layer when the aqueous coating composition according to the present invention is formed on the surface of the metal. Since the content of the powder is too small, the corrosion resistance may lower the corrosion resistance of the coating layer. When the content of the zinc panlate powder exceeds 40 parts by weight, the coating layer may be deteriorated because it is not homogeneously mixed with the aqueous liquid binder. Lifting from the metal may occur.
이때, 상기 판상 아연분말은 아래 도 2에 나타낸 것처럼, 종래에 구상 아연분말과는 다르게 판상을 나타내며, 길이가 15 내지 20 마이크로미터이며, 폭이 3 내지 7 마이크로미터이고, 두께가 0.4 내지 0.6 마이크로미터인 것이 바람직한데, 상기와 같이 입자크기를 나타내는 판산 아연분말은 수성 액체 바인더 내부에서 균질하게 분산되어 내식성의 특성을 향상시키는 효과를 나타낸다.At this time, the plate-like zinc powder, as shown in Figure 2 below, conventionally shows a plate-like, unlike spherical zinc powder, the length is 15 to 20 micrometers, the width is 3 to 7 micrometers, the thickness is 0.4 to 0.6 micrometers It is preferable that the meter be used, but the zinc phosphate powder exhibiting the particle size as described above is homogeneously dispersed in the aqueous liquid binder, thereby improving the corrosion resistance property.
따라서, 본 발명에 따른 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 판상의 아연분말이 사용되어 경도가 높고 색상이 저하되지 않는 피막을 형성하며, 아연분말의 과량으로 첨가되어도 전기전도성의 저하현상이 억제되며, 고온이나 높은 pH(고염기)에서도 안정성이 저하되지 않는 바인더가 사용되어 물성이 유지되는 피막을 형성하는 탁월한 효과를 나타낸다.Accordingly, the pigment-separated aqueous coating composition in which the plate-like zinc powder is mixed according to the present invention forms a film having a high hardness and does not deteriorate in color due to the use of the plate-like zinc powder, and deteriorates the electrical conductivity even when the zinc powder is added in an excessive amount. This is suppressed, and the binder which does not reduce stability even at high temperature or high pH (high base) is used, and shows the outstanding effect of forming the film in which a physical property is maintained.
이하에서는, 본 발명에 따른 안료 분리형 수성도료 조성물의 물성을 실시예를 들어 설명하기로 한다.Hereinafter, the physical properties of the pigment-separable aqueous coating composition according to the present invention will be described with reference to Examples.
<실시예 1><Example 1>
정제수 100 중량부, 규산칼륨 735 중량부, 콜로이달 실리카 175 중량부, 디우탄검 2.5 중량부, 수용성 폴리아닐린 20 중량부 및 옥틸페놀 에톡시레이트 2.5 중량부를 혼합하여 제조된 수성 액체 바인더 100 중량부에 길이가 15 내지 20 마이크로미터이며, 폭이 3 내지 7 마이크로미터이고, 두께가 0.4 내지 0.6 마이크로미터인 판상 아연분말 35 중량부를 혼합하여 안료 분리형 수성도료 조성물을 제조하였다.100 parts by weight of purified water, 735 parts by weight of potassium silicate, 175 parts by weight of colloidal silica, 2.5 parts by weight of diutan gum, 20 parts by weight of water-soluble polyaniline and 2.5 parts by weight of octylphenol ethoxylate, and 100 parts by weight of an aqueous liquid binder. A pigment-separable aqueous coating composition was prepared by mixing 35 parts by weight of a plate-like zinc powder having a length of 15 to 20 micrometers, a width of 3 to 7 micrometers, and a thickness of 0.4 to 0.6 micrometers.
<비교예 1>Comparative Example 1
정제수 100 중량부에 대하여, 규산칼륨 720 중량부, 콜로이달 실리카 150 중량부, 지탄검 3 중량부 및 옥틸페놀에톡시레이트 2.5 중량부를 혼합하여 제조된 수성 액체 바인더 100 중량부에 아연분말 240 중량부를 혼합하여 안료 분리형 수성도료 조성물을 제조하였다.240 parts by weight of zinc powder to 100 parts by weight of aqueous liquid binder prepared by mixing 720 parts by weight of potassium silicate, 150 parts by weight of colloidal silica, 3 parts by weight of zitane gum and 2.5 parts by weight of octylphenolethoxylate Mixing to prepare a pigment-separable aqueous coating composition.
<실시예 2><Example 2>
상기 실시예 1을 통해 제조된 안료분리형 수성도료 조성물을 나사의 표면에 10㎛의 두께로 도포하여 안료 분리형 수성도료 조성물이 코팅된 나사를 제조하였다.The pigment-removable aqueous coating composition prepared in Example 1 was applied to the surface of the screw with a thickness of 10 μm to prepare a screw coated with the pigment-dispersible aqueous coating composition.
<실시예 3><Example 3>
상기 비교예 1을 통해 제조된 안료 분리형 수성도료 조성물을 나사의 표면에 40㎛의 두께로 도포한 후에 상기 실시예 1을 통해 제조된 안료 분리형 수성도료 조성물을 10㎛의 두께로 추가 도포하여 안료 분리형 수성도료 조성물이 이중으로 코팅된 나사를 제조하였다.After applying the pigment-removable water-based coating composition prepared in Comparative Example 1 to the surface of the screw with a thickness of 40㎛, the pigment-separated water-based coating composition prepared in Example 1 was further applied in a thickness of 10㎛ A screw coated with an aqueous coating composition was prepared.
<비교예 2>Comparative Example 2
상기 비교예 1을 통해 제조된 안료 분리형 수성도료 조성물을 나사의 표면에 40㎛의 두께로 도포하여 안료 분리형 수성도료 조성물이 코팅된 나사를 제조하였다.The pigment-separated aqueous coating composition prepared in Comparative Example 1 was applied to the surface of the screw with a thickness of 40 μm to prepare a screw coated with the pigment-separable aqueous coating composition.
상기 실시예 1 및 비교예 1을 통해 제조된 안료 분리형 수성도료 조성물의 전기전도성을 측정하여 아래 표 1에 나타내었다.The electrical conductivity of the pigment-separable aqueous coating composition prepared through Example 1 and Comparative Example 1 was measured and shown in Table 1 below.
{단, 전기전도성은 상기 실시예 1 및 비교예 1을 통해 제조된 안료분리형 수성도료 조성물을 철판의 표면에 도포하고, 상부, 중간부 및 하부로 나누어서 측정하였으며, 시험환경은 온도 24.5℃의 온도와 50 내지 55%의 습도에서 측정하였고, Saehan ST850A 멀티테스터기를 이용하여 저항값(Ω)을 측정하였다.}{However, the electrical conductivity was measured by applying the pigment separation-type aqueous coating composition prepared in Example 1 and Comparative Example 1 on the surface of the iron plate, divided into the upper, middle and lower portions, the test environment was a temperature of 24.5 ℃ Was measured at a humidity of 50 to 55%, and a resistance value (Ω) was measured using a Saehan ST850A multitester.}
표 1
구분 상부(Ω) 중간부(Ω) 하단부(Ω) 평균
실시예 1 2.0 5.9 3.2 3.7 옴
비교예 1 122.2 168.5 99.8 130.2 옴
Table 1
division Top (Ω) Middle part (Ω) Lower part (Ω) Average
Example 1 2.0 5.9 3.2 3.7 ohm
Comparative Example 1 122.2 168.5 99.8 130.2 ohm
위에 표 1에 나타낸 것처럼 본 발명의 실시예 1을 통해 제조된 안료 분리형 수성도료 조성물은 비교예 1을 통해 제조된 안료 분리형 수성도료 조성물에 비해 전기전도성이 우수한 것을 알 수 있다.As shown in Table 1 above, it can be seen that the pigment-separable aqueous coating composition prepared in Example 1 of the present invention is superior in electrical conductivity to the pigment-separable aqueous coating composition prepared in Comparative Example 1.
또한, 상기 실시예 2를 통해 제조된 나사를 한국화학융합시험연구원에 의뢰하여 중성염수분무시험을 실시하고 그 결과를 아래 도 3에 나타내었다.In addition, the screw prepared in Example 2 was commissioned by the Korea Institute of Chemical Convergence Testing and conducted a neutral saline spray test and the results are shown in Figure 3 below.
아래 도 3에 나타낸 것처럼, 본 발명의 2를 통해 제조된 나사는 도막의 두께가 비교예 2를 통해 제조된 나사의 1/4 수준임에도 불구하고 700 시간의 중성염수분무시험 측정결과를 만족하여 우수한 내식성을 나타내는 것을 알 수 있다.As shown in FIG. 3 below, the screw manufactured through 2 of the present invention satisfies the result of 700 hours of neutral saline spray test despite the thickness of the coating film of the screw prepared through Comparative Example 2. It can be seen that it exhibits corrosion resistance.
또한, 상기 실시예 3 및 비교예 2를 통해 제조된 나사를 한국화학융합시험연구원에 의뢰하여 중성염수분무시험을 실시하고 그 결과를 아래 도 4(실시예 3) 및 도 5(비교예 2)에 나타내었다.In addition, the screw prepared in Example 3 and Comparative Example 2 was commissioned by the Korea Institute of Chemical Convergence Testing and carried out the neutral saline spray test and the results are shown in Figure 4 (Example 3) and Figure 5 (Comparative Example 2) Shown in
아래 도 4 및 도 5에 나타낸 것처럼, 본 발명의 실시예 3을 통해 제조된 나사는 1500시간의 중성염수분무시험 측정결과를 만족하였으며, 비교예 2를 통해 제조된 나사에 비해 우수한 내식성을 나타내었는데, 즉, 본 발명에 따른 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 기존에 형성되어 있는 도막의 상도로 적용되면 기존 도막의 내식성을 월등하게 향상시키는 것을 알 수 있다.4 and 5 below, the screw manufactured through Example 3 of the present invention satisfies the result of 1500 hours of neutral saline spray test, and showed excellent corrosion resistance compared to the screw prepared through Comparative Example 2. That is, it can be seen that the pigment-dispersible aqueous coating composition in which the plate-like zinc powder according to the present invention is mixed is applied to the top of the existing coating film to significantly improve the corrosion resistance of the existing coating film.
본 발명은 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물에 관한 것으로, 철재 등의 금속재의 열적 산화나 부식 방지의 특성이 우수하여 500℃ 정도까지의 고온의 열을 받는 금속 소재의 코팅에 적합하므로 금속 정제플랜트, 식품화학공장 플랜트 등과 같은 구조물과 같이 각종 화학적 특성을 가진 부식조건과 고온의 열에 의해 쉽게 부식되는 금속소재의 부품에 적용하거나 용융아연도금의 후처리제인 크로메이트 처리제를 대체할 수 있는 장점이 있으며, 구상의 아연분말 대신 판상의 아연분말이 혼합되어 경도, 전도성 및 내식성이 월등하게 향상된 피막을 형성하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물이다.The present invention relates to a pigment-separated aqueous coating composition in which a plate-like zinc powder is mixed. The present invention is excellent in thermal oxidation or corrosion protection of metals such as iron, and is suitable for coating metal materials subjected to high temperature heat up to about 500 ° C. It can be applied to parts of metal materials that are easily corroded by high temperature heat and corrosion conditions with various chemical properties such as structures such as metal refining plant and food chemical plant plant, or it can substitute chromate treatment agent which is a post-treatment agent of hot dip galvanizing In addition, the plate-like zinc powder is mixed instead of the spherical zinc powder to form a pigment-like aqueous coating composition is mixed with a plate-like zinc powder to form a film with improved hardness, conductivity and corrosion resistance.

Claims (4)

  1. 수성 액체 바인더와 판상 아연분말을 코팅작업 직전에 균일하게 혼합하여 이루어지는 것을 특징으로 하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물.A pigment-separable aqueous coating composition in which a plate-like zinc powder is mixed, wherein the aqueous liquid binder and the plate-like zinc powder are uniformly mixed immediately before coating.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물은 수성 액체 바인더 100 중량부 및 판상 아연분말 30 내지 40 중량부를 혼합하여 이루어지는 것을 특징으로 하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물.The pigment separation type aqueous coating composition, wherein the plate-like zinc powder is mixed, is formed by mixing 100 parts by weight of the aqueous liquid binder and 30 to 40 parts by weight of the plate-like zinc powder.
  3. 청구항 1 또는 2에 있어서,The method according to claim 1 or 2,
    상기 수성 액체 바인더는 정제수 100 중량부, 규산칼륨 720 내지 750 중량부, 콜로이달 실리카 150 내지 200 중량부, 디우탄검 2 내지 3 중량부, 수용성 폴리아닐린 10 내지 30 중량부 및 옥틸페놀 에톡시레이트 2 내지 3 중량부로 이루어지는 것을 특징으로 하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물.The aqueous liquid binder is 100 parts by weight of purified water, 720 to 750 parts by weight of potassium silicate, 150 to 200 parts by weight of colloidal silica, 2 to 3 parts by weight of diutan gum, 10 to 30 parts by weight of water-soluble polyaniline and octylphenol ethoxylate 2 Pigment separated type aqueous coating composition, characterized in that consisting of 3 parts by weight of the plate-like zinc powder.
  4. 청구항 1 또는 2에 있어서,The method according to claim 1 or 2,
    상기 판상 아연분말은 길이가 15 내지 20 마이크로미터이며, 폭이 3 내지 7 마이크로미터이고, 두께가 0.4 내지 0.6 마이크로미터인 것을 특징으로 하는 판상 아연분말이 혼합된 안료 분리형 수성도료 조성물.The plate-like zinc powder has a length of 15 to 20 micrometers, a width of 3 to 7 micrometers, the thickness of the plate-like zinc powder is mixed pigment-based aqueous coating composition, characterized in that 0.4 to 0.6 micrometers.
PCT/KR2014/007559 2014-08-13 2014-08-14 Pigment separable type aqueous paint composition mixed with plate-like zinc powder WO2016024653A1 (en)

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