Anti-corrosion coating composition kit, method for producing Anti-corrosion coating composition, Anti-corrosion coating film, substrate equipped with Anti-corrosion coating film, and method for producing substrate equipped with Anti-corrosion coating film

Abstract

An embodiment of the present invention relates to an anti-corrosion coating composition kit, a method for producing an anti-corrosion coating composition, an anti-corrosion coating film, a substrate equipped with an anti-corrosion coating film, or a method for producing a substrate equipped with an anti-corrosion coating film, wherein: the anti-corrosion coating composition kit contains a first agent that includes a liquid epoxy resin (A) and a second agent that includes an amine curing agent (B); the second agent contains water and a polyoxyalkylene amine as the amine curing agent (B); the content of a non-volatile component in the anti-corrosion coating composition, as measured in accordance with ASTM D-5201-05, is at least 85 mass%; and the content of a volatile organic compound (VOC) in the anti-corrosion coating composition is no more than 100 g / L.

Description

Anticorrosion coating composition kit, method for producing anticorrosion coating composition, anticorrosion coating film, substrate with anticorrosion coating film, and method for producing substrate with anticorrosion coating film

[0001] One embodiment of the present invention relates to an anticorrosion coating composition kit (a kit for an anticorrosion coating composition), a method for producing an anticorrosion coating composition, an anticorrosion coating, a substrate with an anticorrosion coating, or a method for producing a substrate with an anticorrosion coating.

[0002] BACKGROUND ART Solvent-based epoxy resin anticorrosive paints have conventionally been applied to substrates such as ships, marine structures, plants, bridges, and land-based tanks in order to ensure their long-term use.

[0003] In recent years, with the strengthening of regulations on organic solvent emissions aimed at considering the natural environment, the painting work environment, etc., efforts are being made to reduce the VOC (volatile organic compound) content of solvent-based paints such as those mentioned above. One known method for reducing VOC content is to use water as the solvent and dispersion medium.

[0004] As an example of the anticorrosive paint using water, Patent Document 1 discloses an anticorrosive paint in which water is blended with a first agent containing an epoxy resin.

[0005] Japanese Patent Application Laid-Open No. 2001-2986

[0006] However, the conventional anticorrosive coatings containing water described in Patent Document 1 and the like do not have sufficient low-temperature curing properties, and the anticorrosive coating films formed from these anticorrosive coatings do not have sufficient corrosion resistance and discoloration resistance, and in these respects there is room for improvement.

[0007] Furthermore, increasing the solidity of paints is an effective way to improve the efficiency of painting work, such as by reducing the number of coats required to form a corrosion-resistant coating of a given thickness. However, with the conventional corrosion-resistant paints, the viscosity increases as the solidity increases. In other words, it has been difficult for conventional water-based corrosion-resistant paints to simultaneously achieve a good balance between high solidity, low viscosity, low-temperature curing, corrosion resistance, and discoloration resistance.

[0008] One embodiment of the present invention provides an anticorrosion coating composition kit that is capable of forming an anticorrosion coating film that is excellent in a well-balanced manner in low-temperature curing properties, corrosion resistance, and discoloration resistance, even though it is a high-solid, low-viscosity anticorrosion coating composition that contains water.

[0009] An example of the configuration of the present invention is as follows.

[0010] [1] An anticorrosion coating composition kit containing a first part containing a liquid epoxy resin (A) and a second part containing an amine curing agent (B), wherein the second part contains water and a polyoxyalkyleneamine (B1) as the amine curing agent (B), the anticorrosion coating composition has a non-volatile content of 85 mass% or more as measured in accordance with ASTM D-5201-05, and the anticorrosion coating composition has a volatile organic compound (VOC) content of 100 g / L or less.

[0011] [2] The kit according to [1], wherein the liquid epoxy resin (A) contains a bisphenol F type epoxy resin.

[0012] [3] The kit according to [1] or [2], wherein the content of water is 0.1 to 10 mass% relative to 100 mass% of the anticorrosive coating composition.

[0013] [4] The kit according to any one of [1] to [3], wherein the content of the polyoxyalkyleneamine (B1) is 5 to 60% by mass relative to 100% by mass of the solid content of the second agent.

[0014] [5] The kit according to any one of [1] to [4], wherein the first agent further contains a reactive diluent.

[0015] [6] The kit according to any one of [1] to [5], wherein the first agent further contains a silane coupling agent.

[0016] [7] The kit according to any one of [1] to [6], wherein the anticorrosive coating composition contains a non-reactive diluent.

[0017] [8] A method for producing an anticorrosion coating composition, comprising: Step 1: preparing a first agent using a liquid epoxy resin (A); Step 2: preparing a second agent containing water using a polyoxyalkyleneamine (B1); and Step 3: mixing the first agent and the second agent.

[0018] [9] A corrosion-resistant coating film formed using the kit according to any one of [1] to [7].

[0019]

[10] A substrate with a corrosion-resistant coating film, comprising a substrate and the corrosion-resistant coating film according to [9].

[0020]

[11] A method for producing a substrate with a corrosion-protective coating film, comprising the following steps I and II: Step I: applying to a substrate the corrosion-protective coating composition obtained using the kit according to any one of [1] to [7]; and Step II: drying the corrosion-protective coating composition applied to the substrate to form a corrosion-protective coating film.

[0021] According to one embodiment of the present invention, a corrosion-resistant coating film can be formed that is excellent in a well-balanced manner in low-temperature curing property, corrosion resistance, and discoloration resistance, even though the anticorrosion coating composition contains water and is high-solid and low-viscosity. Furthermore, according to one embodiment of the present invention, an anticorrosion coating composition can be obtained that has low viscosity, excellent coating workability, and excellent storage stability. Furthermore, the second agent in the anticorrosion coating composition kit according to one embodiment of the present invention has excellent storage stability, specifically, excellent appearance without becoming cloudy.

[0022] Anticorrosion coating compositions are used under conditions where the drying and curing temperatures are low when forming an anticorrosion coating film from the composition, such as in winter. However, conventional anticorrosion coating compositions cannot simultaneously satisfy all of the following characteristics: high solid, low viscosity, low-temperature curing, and storage stability. This limits their use in winter, and leaves room for improvement in that they require heating during drying and curing. On the other hand, according to one embodiment of the present invention, an anticorrosion coating composition can be provided that simultaneously satisfies all of the following characteristics: high solid, low viscosity, low-temperature curing, and storage stability. Therefore, the anticorrosion coating composition can be suitably used under conditions where the drying and curing temperatures are low (e.g., 5°C) when forming an anticorrosion coating film from the composition, such as in winter. Therefore, the anticorrosion coating composition according to one embodiment of the present invention can be used all year round, but its effectiveness is particularly enhanced as an anticorrosion coating composition for winter use.

[0023] <<Anti-corrosion Coating Composition Kit>> An anti-corrosion coating composition kit (hereinafter also referred to as "the composition") according to one embodiment of the present invention (hereinafter also referred to as "the kit") comprises a first part containing a liquid epoxy resin (A) and a second part containing an amine curing agent (B), wherein the second part contains water and a polyoxyalkyleneamine (B1) as the amine curing agent (B), the content of non-volatile matter in the composition measured in accordance with ASTM D-5201-05 is 85% by mass or more, and the content of volatile organic compounds (VOCs) in the composition is 100 g / L or less.

[0024] The present kit can obtain the present composition by mixing the first agent and the second agent. When obtaining the present composition from the present kit, an nth agent (n is 3 or more) other than the first agent and the second agent may be used if necessary, but it is preferable not to use the nth agent. In other words, the present kit is preferably a kit for the present composition of two components.

[0025] The first agent, second agent, etc. constituting this kit are usually stored, preserved, transported, etc. in separate containers, and are mixed together immediately before use of the composition.

[0026] <First Agent> The first agent is not particularly limited as long as it contains the liquid epoxy resin (A). The first agent is preferably prepared by the following step 1.

[0027] The viscosity of the first pack (immediately after preparation), measured at 23°C (rotation speed: 60 rpm) using a No. 1 rotor of a Viscometer VT-04F (manufactured by Rion Co., Ltd.), is preferably 15,000 mPa s or less, more preferably 12,000 mPa s or less, even more preferably 10,000 mPa s or less, and preferably 1,500 mPa s or more, from the viewpoints of being able to easily obtain a composition having a low viscosity and excellent handleability and coating workability.

[0028] [Liquid Epoxy Resin (A)] The first agent contains a liquid epoxy resin (A), and in this method, the liquid epoxy resin (A) is used as the first agent. The liquid epoxy resin (A) used in the first agent may be one type or two or more types.

[0029] The liquid epoxy resin (A) is liquid at room temperature (e.g., 15 to 25° C.) Such a liquid epoxy resin is preferred because, even when the first part contains a relatively small amount of solvent or is solvent-free and contains other components in addition to the liquid epoxy resin (A), it is easy to uniformly disperse the other components in the first part and the reactivity with the amine curing agent (B), which will be described later, is good.

[0030] The viscosity of the liquid epoxy resin (A) at 25°C, measured with an E-type viscometer (FMD type, manufactured by TOKIMEC Corporation, rotation speed: 60 rpm), is preferably 1,500 mPa s or more, more preferably 3,000 mPa s or more, and is preferably 30,000 mPa s or less, more preferably 25,000 mPa s or less.

[0031] Examples of the liquid epoxy resin (A) include bisphenol A type epoxy resins, bisphenol F type epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, novolac type epoxy resins, cresol type epoxy resins, dimer acid-modified epoxy resins, aliphatic epoxy resins, alicyclic epoxy resins, and epoxidized oil-based epoxy resins.

[0032] As the liquid epoxy resin (A), a bisphenol A or bisphenol F type epoxy resin is preferred from the viewpoint that an anticorrosive coating film having excellent anticorrosion properties and adhesion to the substrate can be easily formed, and further, it is preferable to contain a bisphenol F type epoxy resin from the viewpoint that a present composition having low viscosity and excellent low-temperature curing properties can be easily obtained, even though it is a high-solid anticorrosive coating composition containing water.

[0033] The number average molecular weight of the liquid epoxy resin (A) is preferably 1,000 or less, more preferably 500 or less, from the viewpoints that an anticorrosion coating composition that is high solid yet low viscosity and has excellent coating workability can be easily obtained.

[0034] The liquid epoxy resin (A) may be a compound synthesized by a conventionally known method, or a commercially available product such as "E-028" (manufactured by Ohtake Meishin Chemical Co., Ltd.), "jER 828", "Epikote 828" (manufactured by Mitsubishi Chemical Corporation), "Cardura E10P" (manufactured by Hexion), or "ADEKA RESIN EP-4901" (manufactured by ADEKA Corporation).

[0035] The solid content of the liquid epoxy resin (A) is preferably 10 to 40 mass%, more preferably 15 to 35 mass%, based on 100 mass% of the nonvolatile content of the composition. Furthermore, the solid content of the liquid epoxy resin (A) is preferably 5 to 50 mass%, more preferably 10 to 40 mass%, based on 100 mass% of the solid content of the first agent. When the content of the liquid epoxy resin (A) is within the above range, a corrosion-resistant coating film that exhibits excellent corrosion resistance and adhesion to substrates can be easily formed.

[0036] [Other Components] The first agent may contain, as desired, other components such as a reactive diluent, a non-reactive diluent, a silane coupling agent, a pigment, a (pigment) dispersant, an antifoaming agent, an anti-sagging agent (thixotropic agent), a curing accelerator, water, etc. These other components may each be used alone or in combination of two or more.

[0037] The other components may be conventionally known components, or commercially available products. When a component having a reactive group is used as the other component, each component is blended into the first or second part, etc., taking into consideration the reactivity of the reactive group (whether it is reactive with the liquid epoxy resin (A) or reactive with the amine curing agent (B)).

[0038] <Reactive Diluent> The present composition (present kit) may contain a reactive diluent. It is preferable that the present composition (present kit) contains a reactive diluent, since it is possible to easily obtain a low-viscosity present composition. The reactive diluent is preferably an epoxy group-containing reactive diluent. One type of reactive diluent may be used, or two or more types may be used.

[0039] The epoxy group-containing reactive diluent is a compound other than the liquid epoxy resin (A). The epoxy group-containing reactive diluent is not particularly limited as long as it is an epoxy compound having a viscosity of 500 mPa·s or less at 25°C as measured with an E-type viscometer (FMD model, manufactured by TOKIMEC Corporation, rotation speed: 60 rpm), and may be either a monofunctional or polyfunctional type, but preferably contains a polyfunctional epoxy group-containing reactive diluent.

[0040] Examples of the monofunctional epoxy group-containing reactive diluent include alkyl glycidyl ethers (suitable examples of the alkyl group: carbon number 1 to 13), phenyl glycidyl ether, o-cresyl glycidyl ether, alkylphenyl glycidyl ethers (suitable examples of the alkyl group: carbon number 1 to 20, preferably 1 to 5, e.g., methylphenyl glycidyl ether, ethylphenyl glycidyl ether, propylphenyl glycidyl ether, p-tert-butylphenyl glycidyl ether), phenol glycidyl ether, alkylphenol glycidyl ether, phenol (EO) ｎ Glycidyl ether (repeating number n=3 to 20, EO: -C ２ H ４ O-), alkyl glycidyl esters (preferable examples of alkyl groups: carbon number of 3 to 10), and polyglycol glycidyl ethers.

[0041] Examples of polyfunctional epoxy group-containing reactive diluents include 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, resorcinol diglycidyl ether, polyglycol diglycidyl ether, mono- or polyalkylene glycol diglycidyl ethers (preferable examples of alkylene groups: having 1 to 5 carbon atoms, e.g., ethylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether), trimethylolpropane triglycidyl ether, alkyl diglycidyl ethers, and alkyl diglycidyl esters. Preferred examples of the alkyl group include alkyl groups having 3 to 10 carbon atoms, such as neopentyl and 2-ethylhexyl groups.

[0042] When the composition contains a reactive diluent, the solid content of the reactive diluent is preferably 0.1 to 15 mass%, more preferably 0.5 to 12 mass%, and even more preferably 1 to 10 mass%, based on 100 mass% of the nonvolatile content of the composition. When the content of the reactive diluent is within the above range, a corrosion-resistant coating film excellent in oil resistance, solvent resistance, chemical resistance, corrosion prevention properties, etc. can be easily formed, and the viscosity of the composition can be reduced.

[0043] <Non-reactive diluent> The present composition (present kit) may contain a non-reactive diluent. It is preferable to contain a non-reactive diluent from the viewpoint of improving the flexibility of the obtained corrosion-protective coating film. The non-reactive diluent refers to a compound that does not have a functional group reactive with an epoxy group or an amino group.

[0044] As the non-reactive diluent, a wide variety of conventionally known non-reactive diluents can be used, and examples thereof include liquid hydrocarbon resins such as low-boiling fractions obtained by thermal decomposition of naphtha (including modified products of the liquid hydrocarbon resins), cardanol and cardanol derivatives prepared from cashew nut shell liquid or the like, petroleum resins, xylene resins, and coumarone-indene resins. Specific examples thereof include the liquid hydrocarbon resins and flexibility-imparting resins described in JP 2006-342360 A.

[0045] Among these, liquid hydrocarbon resins, cardanol, and cardanol derivatives are preferred, and phenol-modified hydrocarbon resins, cardanol, and cardanol derivatives are more preferred, from the viewpoint of excellent compatibility with the liquid epoxy resin (A). Examples of the phenol-modified hydrocarbon resins include resins obtained using diolefins, monoolefins, or α-methylstyrene contained in petroleum or coal cracked oil fractions with phenols (phenolic compounds), as described in JP-A-9-268209 and JP-A-7-196793.

[0046] More specifically, examples of the phenol-modified hydrocarbon resin include resins obtained by reacting phenols with C5 (aliphatic) petroleum resins made from C5 fractions; C9 (aromatic) petroleum resins made from C9 fractions; C5-C9 copolymer petroleum resins; dicyclopentadiene resins made from dicyclopentadiene obtained by thermally dimerizing cyclopentadiene contained in C5 fractions; and α-methylstyrene. Among these, resins obtained by addition polymerization of phenols with styrene, vinyltoluene, coumarone, indene, α-methylstyrene, or the like contained in petroleum or coal cracked oil fractions are preferred.

[0047] The average molecular weight of the phenol-modified hydrocarbon resin is usually 200 to 1,000, and the viscosity is usually 30 to 10,000 mPa·s / 25°C.

[0048] As the liquid hydrocarbon resin, commercially available products may be used, and examples of such commercially available products include "Nesiles EPX-L" and "Nesiles EPX-L2" (phenol-modified hydrocarbon resins manufactured by NEVCIN Corporation) and "Hirenol PL-1000S" (phenol-modified hydrocarbon resin manufactured by Kolon Industries, Inc.).

[0049] Commercially available cardanol and cardanol derivatives may be used, and examples of such commercially available products include "Cardolite NX-2026" (manufactured by Cardolite, Inc. / cardanol), "Cardolite Lite-2020," "Cardolite NX-7507," "Cardolite NX-7509," and "Cardolite NX-7512" (all manufactured by Cardolite, Inc. / cardanol derivatives).

[0050] An organic solvent may be used as the non-reactive diluent. However, in order to keep the VOC content in the composition within the range specified below, it is preferable to use a high-boiling organic solvent having a boiling point of more than 150°C at normal pressure, and it is preferable to keep the content of low-boiling organic solvents having a boiling point of 150°C or less at normal pressure low. The upper limit of the boiling point of the high-boiling organic solvent is not particularly limited, but is, for example, 250°C. The content of the organic solvent is preferably less than 14.9% by mass, more preferably less than 10% by mass, and even more preferably less than 5% by mass, based on 100% by mass of the composition. The content of the high-boiling organic solvent is preferably less than 14.9% by mass, more preferably less than 10% by mass, and even more preferably less than 5% by mass, based on 100% by mass of the composition. The content of the low-boiling organic solvent is preferably less than 14.9% by mass, more preferably less than 10% by mass, based on 100% by mass of the composition, and it is particularly preferable that the composition does not contain a low-boiling organic solvent.

[0051] An example of the high-boiling organic solvent is benzyl alcohol.

[0052] Examples of the low-boiling organic solvent include xylene, toluene, methyl isobutyl ketone, methoxypropanol, methyl ethyl ketone, butyl acetate, n-butanol, isobutanol, isopropyl alcohol, and propylene glycol monomethyl ether acetate.

[0053] When the composition contains a non-reactive diluent, the content of the non-reactive diluent is preferably 0.1 to 15 mass %, more preferably 1 to 10 mass %, based on 100 mass % of the non-volatile content of the composition. When the content of the non-reactive diluent is within this range, a corrosion-protective coating film having excellent crack resistance and the like can be easily formed.

[0054] <Silane Coupling Agent> The present composition (present kit) may contain a silane coupling agent. Use of a silane coupling agent makes it possible to easily obtain a low-viscosity anticorrosion coating composition and further improve the adhesion of the obtained anticorrosion coating film to the substrate, as well as improve the corrosion resistance, such as water resistance and saltwater resistance, and heat resistance, of the obtained anticorrosion coating film.

[0055] The silane coupling agent is not particularly limited, and any conventionally known compound can be used, but it is preferable that the silane coupling agent is a compound that has at least two functional groups in the same molecule and can contribute to improving adhesion to the substrate and reducing the viscosity of the composition.

[0056] The silane coupling agent is, for example, a compound represented by the formula: "X-SiMe ｎ Y ３－ｎ " [n is 0 or 1, X is a functional group capable of reacting with an organic substance (e.g., an amino group, a vinyl group, an epoxy group, a mercapto group, a halogeno group, a group in which a hydrocarbon group is partially substituted with any of these groups, or a group in which a hydrocarbon group is partially substituted with an ether bond or the like and is partially substituted with any of these groups), Me is a methyl group, and Y is a hydrolyzable group (e.g., an alkoxy group such as a methoxy group or an ethoxy group).]

[0057] When a silane coupling agent reactive with the amine curing agent (B), such as an epoxy group-containing silane coupling agent, is used, the silane coupling agent is preferably blended in the first part. When a silane coupling agent reactive with the liquid epoxy resin (A), such as an amino group-containing silane coupling agent, is used, the silane coupling agent is preferably blended in the second part.

[0058] Among the above-mentioned silane coupling agents, preferred are epoxy group-containing silane coupling agents in which X is an epoxy group, a group in which a hydrocarbon group is partly substituted with an epoxy group, or a group in which a hydrocarbon group is partly substituted with an ether bond or the like and partly substituted with an epoxy group.

[0059] As the silane coupling agent, commercially available products may be used, and examples of such commercially available products include 3-glycidoxypropyltrimethoxysilane "KBM-403" (manufactured by Shin-Etsu Chemical Co., Ltd.) and "Sila-Ace S-510" (manufactured by JNC Corporation).

[0060] When the present composition contains a silane coupling agent, the solid content of the silane coupling agent is preferably 1% by mass or more, more preferably 3% by mass or more, and preferably 25% by mass or less, more preferably 15% by mass or less, based on 100% by mass of the nonvolatile content of the present composition. When the content of the silane coupling agent is within the above range, the viscosity of the present composition can be reduced, so that a low-viscosity anticorrosion coating composition with excellent coating workability can be easily obtained, and the adhesion to the substrate, corrosion prevention, and heat resistance of the obtained anticorrosion coating film are improved.

[0061] <Anti-sagging agent> The composition (kit) may contain an anti-sagging agent. The anti-sagging agent is not particularly limited, but is preferably a material that can suppress sedimentation of pigments and the like in the composition and improve its storage stability, or a material that can improve the anti-sagging properties of the composition during or after application.

[0062] As the anti-sagging agent, conventionally known anti-sagging agents such as organoclay waxes such as stearate salts, lecithin salts, and alkylsulfonates of Al, Ca, and Zn, polyethylene wax, amide wax, hydrogenated castor oil wax, a mixture of hydrogenated castor oil wax and amide wax, synthetic finely powdered silica, and oxidized polyethylene wax are usable. Among these, amide wax, synthetic finely powdered silica, oxidized polyethylene wax, and organoclay wax are preferred because they can further improve the anti-sagging properties of the composition during and after application.

[0063] Commercially available products may be used as such anti-sagging agents, and examples of such commercially available products include "Disparlon 305", "Disparlon 4200-20", "Disparlon 6650", and "Disparlon AQ600" manufactured by Kusumoto Chemical Co., Ltd., "A-S-A T-250F", "A-S-A TW-121", "A-S-A TW-123", and "A-S-A TW-124" manufactured by Itoh Oil Refining Co., Ltd., "Flonon RCM-300" manufactured by Kyoeisha Chemical Co., Ltd., "RHEOBYK-420" manufactured by BYK Japan K.K., "Benton SD-2" manufactured by Elements Specialties, Inc., and "Aerosil" manufactured by Nippon Aerosil Co., Ltd. R972" manufactured by Arkema Coating Resins Co., Ltd., and "Crayvallac Optima" manufactured by Arkema Coating Resins Co., Ltd.

[0064] When the present composition contains an anti-sagging agent, the content of the solids of the anti-sagging agent is preferably 0.1 to 10 mass %, more preferably 0.3 to 8 mass %, relative to 100 mass % of the nonvolatile content of the present composition. When the content of the anti-sagging agent is within this range, the present composition having excellent anti-sagging properties can be easily obtained.

[0065] <Pigment> The present composition may contain a pigment, and preferably contains a pigment. Examples of the pigment include an extender pigment, a coloring pigment, and an anti-rust pigment, and the pigment may be either organic or inorganic.

[0066] Examples of the extender pigment include talc, mica, (precipitated) barium sulfate, (potassium) feldspar, kaolin, alumina white, bentonite, wollastonite, clay, glass flakes, aluminum flakes, flaky iron oxide, magnesium carbonate, barium carbonate, calcium carbonate, dolomite, and silica, with talc, mica, silica, (precipitated) barium sulfate, and (potassium) feldspar being particularly preferred.

[0067] When the present composition contains an extender pigment, the content of the extender pigment is preferably 10% by mass or more, more preferably 15% by mass or more, and preferably 70% by mass or less, more preferably 60% by mass or less, based on 100% by mass of the nonvolatile content of the present composition.

[0068] Examples of the color pigment include inorganic pigments such as carbon black, titanium dioxide (titanium white), iron oxide (red iron oxide), yellow iron oxide, and ultramarine, and organic pigments such as cyanine blue and cyanine green. Titanium white, carbon black, and red iron oxide are particularly preferred.

[0069] When the present composition contains a color pigment, the content of the color pigment is preferably 1 to 30% by mass, more preferably 1 to 15% by mass, based on 100% by mass of the nonvolatile content of the present composition.

[0070] Examples of the rust-preventive pigment include zinc powder, zinc alloy powder, zinc phosphate compounds, calcium phosphate compounds, aluminum phosphate compounds, magnesium phosphate compounds, zinc phosphite compounds, calcium phosphite compounds, aluminum phosphite compounds, strontium phosphite compounds, aluminum tripolyphosphate compounds, molybdate compounds, zinc cyanamide compounds, borate compounds, nitro compounds, and composite oxides.

[0071] When the present composition contains a pigment, the pigment volume concentration (PVC) in the present composition is preferably 10 to 70%, more preferably 10 to 50%, from the viewpoints that an anticorrosion coating composition having excellent coating workability can be easily obtained, and an anticorrosion coating film having excellent adhesion to the substrate due to stress relaxation and excellent water resistance can be easily formed.

[0072] The PVC refers to the total volume concentration of pigments relative to the volume of nonvolatile matter in the composition. Specifically, the PVC can be calculated using the following formula: PVC [%] = total volume of all pigments in the composition × 100 / volume of nonvolatile matter in the composition.

[0073] The volume of the nonvolatile content in the composition can be calculated from the mass and true density of the nonvolatile content of the composition. The mass and true density of the nonvolatile content may be measured values ​​or values ​​calculated from the raw materials used. The volume of the pigment can be calculated from the mass and true density of the pigment used. The mass and true density of the pigment may be measured values ​​or values ​​calculated from the raw materials used. For example, the volume can be calculated by separating the pigment from other components from the nonvolatile content of the composition and measuring the mass and true density of the separated pigment.

[0074] <(Pigment) Dispersant> The (pigment) dispersant is preferably a dispersant that can uniformly wet and disperse the pigment in the composition to prepare a stable dispersion. Examples of the (pigment) dispersant include polymer dispersants.

[0075] When the present composition contains a (pigment) dispersant, the solid content of the (pigment) dispersant is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.5% by mass or more, relative to 100% by mass of the non-volatile content of the present composition, and is preferably 5% by mass or less.

[0076] <Antifoaming Agent> The present composition preferably contains an antifoaming agent, since this can suppress the generation of bubbles during the production or application of the composition, or can break any bubbles that have generated in the present composition, thereby making it possible to easily form a corrosion-protective coating film with desired physical properties.

[0077] As the defoaming agent, commercially available products may be used, and examples of such commercially available products include "BYK-392", "BYK-066N", "BYK-1770", and "BYK-1790" (all manufactured by BYK Japan K.K.), "TEGO Airex 902W" (manufactured by Evonik), and "Spectrasyn 40" (manufactured by Exxonmobil Chemical Company).

[0078] When the composition contains an antifoaming agent, the content of the solids of the antifoaming agent is preferably 0.005 to 3 mass%, more preferably 0.01 to 1 mass%, based on 100 mass% of the nonvolatile content of the composition. When the content of the antifoaming agent is within this range, foam generation can be sufficiently suppressed, and a corrosion-protective coating film with the desired physical properties can be easily formed.

[0079] <Curing Accelerator> For the purpose of accelerating the drying and curing properties when forming a corrosion-resistant coating film from the composition, a curing accelerator may be blended into the composition as needed. Examples of the curing accelerator include polymerizable (meth)acrylate monomers (provided that the monomers are compounds other than the monocarboxylic acid compounds described below) and tertiary amines. When a polymerizable (meth)acrylate monomer is used, it is used in the first agent, and when a tertiary amine is used, it is used in the second agent described below.

[0080] Commercially available polymerizable (meth)acrylate monomers include "M-CURE 100" (monofunctional aromatic acrylate, functional group equivalent weight 257 to 267), "M-CURE 200" (difunctional aromatic acrylate, functional group equivalent weight 130 to 140), "M-CURE 201" (difunctional aliphatic acrylate, functional group equivalent weight 95 to 105), "M-CURE 300" (trifunctional aliphatic acrylate, functional group equivalent weight 112 to 122), "M-CURE 400" (tetrafunctional aliphatic acrylate, functional group equivalent weight 80 to 90), and "M-CURE 400NS" (tetrafunctional aliphatic acrylate, functional group equivalent weight 80 to 90) (all manufactured by SARTOMER (Guangzhou) Chemicals Ltd.).

[0081] Specific examples of the tertiary amine include triethanolamine, dialkylaminoethanol, triethylenediamine (1,4-diazabicyclo[2.2.2]octane), and 2,4,6-tris(dimethylaminomethyl)phenol, and a commercially available product thereof is "Ancamine K-54" (manufactured by Evonik, 2,4,6-tris(dimethylaminomethyl)phenol).

[0082] When the present composition contains a curing accelerator, the solid content of the curing accelerator is preferably 0.1 to 5% by mass relative to 100% by mass of the nonvolatile content of the present composition.

[0083] <Water> The first agent may contain water or may not contain water, but preferably does not contain water. When the first agent contains water, the content of the water is such that the content of nonvolatile matter in the composition is 85% by mass or more.

[0084] <Second Part> The second part is not particularly limited as long as it contains water and a polyoxyalkyleneamine (B1) as the amine curing agent (B). In the present invention, it is essential to blend water into the second part, and by further blending a polyoxyalkyleneamine (B1) as the amine curing agent (B), it is possible to obtain an anticorrosion coating composition and an anticorrosion coating film that exhibit the above-mentioned effects. The second part is preferably prepared by the following step 2.

[0085] The viscosity of the second pack (immediately after preparation), measured at 23°C (rotation speed: 60 rpm) using a No. 1 rotor of a Viscometer VT-04F (manufactured by Rion Co., Ltd.), is preferably 120,000 mPa s or less, more preferably 10,000 mPa s or less, even more preferably 8,000 mPa s or less, and more preferably 50 mPa s or more, from the viewpoints of being able to easily obtain a present composition that has a low viscosity and is superior in handleability and coating workability.

[0086] [Amine curing agent (B)] The second agent contains a polyoxyalkyleneamine (B1) as the amine curing agent (B). In addition to the polyoxyalkyleneamine (B1), the amine curing agent (B) may contain, in addition to the polyoxyalkyleneamine (B1), another amine curing agent (B2) that is used in a typical epoxy resin-based corrosion-protective coating, and preferably contains the other amine curing agent (B2).

[0087] The active hydrogen equivalent of the amine curing agent (B) is preferably 20 or more, more preferably 30 or more, and even more preferably 40 or more, and is preferably 1,000 or less, more preferably 500 or less, and even more preferably 200 or less, from the viewpoint that an anticorrosion coating film that is excellent in a well-balanced manner in low-temperature curing property, corrosion resistance, and discoloration resistance can be easily formed while still providing a high-solids, low-viscosity anticorrosion coating composition.

[0088] From the viewpoints of being able to easily form an anticorrosion coating film that is excellent in a well-balanced manner in low-temperature curing properties, corrosion prevention properties, and discoloration resistance, and that also has excellent coating film strength, while still being a high-solid, low-viscosity anticorrosion coating composition, it is desirable to use the amine curing agent (B) in an amount such that the reaction ratio calculated by the following formula (1) is preferably 0.3 to 2.0, more preferably 0.3 to 1.5, and even more preferably 0.4 to 1.2.

[0089] Reactivity ratio={(amount of solid content of amine curing agent (B) / active hydrogen equivalent of solid content of amine curing agent (B))+(amount of solid content of component reactive with liquid epoxy resin (A) / functional group equivalent of solid content of component reactive with liquid epoxy resin (A))} / {(amount of solid content of liquid epoxy resin (A) / epoxy equivalent of solid content of liquid epoxy resin (A))+(amount of solid content of component reactive with amine curing agent (B) / functional group equivalent of solid content of component reactive with amine curing agent (B))} (1)

[0090] Here, examples of the "component reactive with the amine curing agent (B)" and the "component reactive with the liquid epoxy resin (A)" in the formula (1) include the silane coupling agent. As the silane coupling agent, a silane coupling agent having an amino group or an epoxy group as a reactive group can be used, so it is necessary to determine whether the silane coupling agent is reactive with the amine curing agent (B) or the liquid epoxy resin (A) depending on the type of the reactive group, and then calculate the reactivity ratio.

[0091] The "functional group equivalent" of each component means the mass (g) per 1 mol of functional group obtained by dividing the mass of 1 mol of the component by the number of moles of the functional group contained therein.

[0092] <Polyoxyalkyleneamine (B1)> Polyoxyalkyleneamine (B1) tends to have excellent dispersibility in water and excellent storage stability of the dispersion obtained by dispersing it in water. By including polyoxyalkyleneamine (B1) in the second agent, the second agent does not become cloudy and has an excellent appearance. This is thought to be because polyoxyalkyleneamine (B1) has an ether structure, so it has high affinity with water and functions as a compatibilizer. One type of polyoxyalkyleneamine (B1) may be used, or two or more types may be used.

[0093] The polyoxyalkyleneamine (B1) is an amine other than a tertiary amine (a compound in which the only amino groups contained therein are tertiary amino groups), and is preferably a compound in which the number of primary or secondary amino groups contained in one molecule is preferably two or more, more preferably three or more.

[0094] Examples of the polyoxyalkyleneamine (B1) include compounds represented by the following formulae (b1-1), (b1-2), (b1-3) and (b1-4).

[0095]

[0096] In formula (b1-1), R １ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, more preferably an alkyl group having 2 carbon atoms. ２ and R ３are each independently an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 5 carbon atoms, and more preferably an alkylene group having 2 carbon atoms. One or more hydrogen atoms bonded to the alkylene group may be substituted with a hydrocarbon group having 1 to 10 carbon atoms (substituted hydrocarbon group), and the number of carbon atoms in the substituted hydrocarbon group is preferably 1 to 5, and more preferably 1. n represents the average value of the repeating units and is 1 to 100, preferably 1 to 30, and more preferably 1 to 10.

[0097]

[0098] In formula (b1-2), R １ , R ２ , and R ３ are each independently an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 5 carbon atoms, and more preferably an alkylene group having 2 carbon atoms. One or more hydrogen atoms bonded to the alkylene group may be substituted with a hydrocarbon group having 1 to 10 carbon atoms (substituted hydrocarbon group), and the number of carbon atoms in the substituted hydrocarbon group is preferably 1 to 5, and more preferably 1. n represents the average value of the repeating units and is 1 to 100, preferably 1 to 30, and more preferably 1 to 10.

[0099]

[0100] In formula (b1-3), R １ , R ２ , and R ３ are each independently an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 5 carbon atoms, and more preferably an alkylene group having 2 carbon atoms. One or more hydrogen atoms bonded to the alkylene group may be substituted with a hydrocarbon group having 1 to 10 carbon atoms (substituted hydrocarbon group), and the number of carbon atoms in the substituted hydrocarbon group is preferably 1 to 5, and more preferably 1. R ４ is a single bond or an alkylene group having 1 to 10 carbon atoms, preferably a single bond or an alkylene group having 1 to 5 carbon atoms, more preferably an alkylene group having 1 carbon atom. ５is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, more preferably an alkyl group having 2 carbon atoms. １ , n ２ , and n ３ means the average number of repeating units, and each independently is 1 to 33. １ and ２ and ３ The sum of these is 3 to 99, preferably 3 to 85, and more preferably 3 to 50.

[0101]

[0102] In formula (b1-4), R １ , R ２ , R ３ , and R ４ are each independently an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 5 carbon atoms, and more preferably an alkylene group having 2 carbon atoms. One or more hydrogen atoms bonded to the alkylene group may be substituted with a hydrocarbon group having 1 to 10 carbon atoms (substituted hydrocarbon group), and the number of carbon atoms in the substituted hydrocarbon group is preferably 1 to 5, and more preferably 1. １ , n ２ , n ３ , and n ４ means the average number of repeating units, and each independently is 1 to 33. １ and ２ and ３ and ４ The sum of these is 3 to 132, preferably 3 to 115, and more preferably 3 to 65.

[0103] The number average molecular weight (Mn) of the polyoxyalkyleneamine (B1) is preferably 100 to 5,000, more preferably 200 to 1,500, and even more preferably 350 to 1,000, from the viewpoint that the present composition having excellent corrosion resistance can be easily obtained.

[0104] The polyoxyalkyleneamine (B1) may be a compound synthesized by a conventionally known method, or a commercially available product. Examples of the commercially available product include "Jeffamine D-230" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene diamine, active hydrogen equivalent 60, solid content 100% by mass, number of functional groups 2, number average molecular weight 230), "Jeffamine D-400" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene diamine, active hydrogen equivalent 115, solid content 100% by mass, number of functional groups 2, number average molecular weight 430), "Jeffamine D-2000" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene diamine, active hydrogen equivalent 514, solid content 100% by mass, number of functional groups 2, number average molecular weight 2,000), and "Jeffamine D-3000" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene diamine, active hydrogen equivalent 300, solid content 100% by mass, number of functional groups 3, number average molecular weight 3,000). D-4000 (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene diamine, active hydrogen equivalent 1,000, solid content 100% by mass, number of functional groups 2, number average molecular weight 4,000), "Jeffamine T-403" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene triamine, active hydrogen equivalent 81, solid content 100% by mass, number of functional groups 3, number average molecular weight 440), Jeffamine T-3000 (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene triamine, active hydrogen equivalent 530, solid content 100% by mass, number of functional groups 3, number average molecular weight 3,000), Jeffamine T-5000" (manufactured by Huntsman Japan Co., Ltd., polyoxypropylene triamine, active hydrogen equivalent 952, solid content 100% by mass, number of functional groups 3, number average molecular weight 5,000).

[0105] The solid content of the polyoxyalkyleneamine (B1) is more preferably an amount within the following range. The solid content of the polyoxyalkyleneamine (B1) is preferably 1 to 20 mass%, more preferably 1.5 to 10 mass%, based on 100 mass% of the nonvolatile content of the composition. The solid content of the polyoxyalkyleneamine (B1) is preferably 5 to 60 mass%, more preferably 10 to 50 mass%, and even more preferably 10 to 40 mass%, based on 100 mass% of the solid content of the second part. When the content of the polyoxyalkyleneamine (B1) is within the above range, a second part that is excellent in appearance can be easily obtained, even though it is a water-containing second part, and an anticorrosion coating composition that is low in viscosity and has excellent low-temperature curing properties can be easily obtained, and a coating film that is excellent in balanced corrosion prevention and discoloration resistance can be formed.

[0106] <Other Amine Curing Agents (B2)> The other amine curing agent (B2) is an amine other than a tertiary amine (a compound in which the only amino groups contained in the compound are tertiary amino groups), and is preferably a polyamine having two or more primary or secondary amino groups per molecule. Specific examples of the other amine curing agent (B2) include aliphatic, alicyclic, aromatic, and heterocyclic amine compounds. These amine compounds are distinguished by the type of carbon to which the amino group is bonded. For example, an aliphatic amine compound refers to a compound having at least one amino group bonded to an aliphatic carbon. The other amine curing agent (B2) may be used alone or in combination of two or more.

[0107] Examples of the aliphatic amine compounds include alkylene polyamines, polyalkylene polyamines, and alkylamino alkyl amines.

[0108] Examples of the alkylene polyamine include those represented by the formula: ２ N-R １ -NH ２ ” (R １is a divalent hydrocarbon group having 1 to 12 carbon atoms. Specific examples include methylenediamine, ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,5-diaminopentane, 1,6-diaminohexane, and trimethylhexamethylenediamine.

[0109] Examples of the polyalkylene polyamine include those represented by the formula: ２ N-(C ｍ H ２ｍ NH) ｎ Specific examples include compounds represented by the formula (II) (H) (where m is an integer of 1 to 10, and n is an integer of 2 to 10, preferably an integer of 2 to 6), such as diethylenetriamine (DETA), dipropylenetriamine, triethylenetetramine (TETA), tripropylenetetramine, tetraethylenepentamine (TEPA), tetrapropylenepentamine, pentaethylenehexamine, nonaethylenedecamine, and triethylene-bis(trimethylene)hexamine.

[0110] Examples of the alkylaminoalkylamine include those represented by the formula: ２ ２ N-(CH ２ ) ｐ -NH ２ ” (R ２ are independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (provided that at least one R ２ is an alkyl group having 1 to 8 carbon atoms, and p is an integer of 1 to 6. Specific examples include dimethylaminoethylamine, diethylaminoethylamine, dibutylaminoethylamine, dimethylaminopropylamine, diethylaminopropylamine, dipropylaminopropylamine, dibutylaminopropylamine, and dimethylaminobutylamine.

[0111] Other aliphatic amine compounds include, for example, tetra(aminomethyl)methane, tetrakis(2-aminoethylaminomethyl)methane, 1,3-bis(2'-aminoethylamino)propane, tris(2-aminoethyl)amine, bis(cyanoethyl)diethylenetriamine, 1,3-bis(aminomethyl)cyclohexane (1,3-BAC), isophoronediamine (IPDA), menthenediamine (MDA), o-xylylenediamine, m-xylylenediamine (MXDA), p-xylylenediamine, bis(aminomethyl)naphthalene, bis(aminoethyl)naphthalene, 1,4-bis(3-aminopropyl)piperazine, 1-(2'-aminoethylpiperazine), 1-[2'-(2''-aminoethylamino)ethyl]piperazine, and norbornanediamine (NBDA).

[0112] Examples of the alicyclic amine compounds include cyclohexanediamine, diaminodicyclohexylmethane (particularly, 4,4'-methylenebis(cyclohexylamine) [PACM]), 4,4'-isopropylidenebiscyclohexylamine, and 2,4-di(4-aminocyclohexylmethyl)aniline.

[0113] Examples of the aromatic amine compound include aromatic polyamine compounds having two or more primary amino groups bonded to an aromatic ring such as a benzene ring, a naphthalene ring, etc. Specific examples of the aromatic amine compound include phenylenediamine, naphthalenediamine, diaminodiphenylmethane, 2,2-bis(4-aminophenyl)propane, 4,4'-diaminodiphenyl ether, 4,4'-diaminobenzophenone, 4,4'-diaminodiphenyl sulfone, 3,3'-dimethyl-4,4'-diaminodiphenylmethane, diaminodiethylphenylmethane, 2,4'-diaminobiphenyl, 2,3'-dimethyl-4,4'-diaminobiphenyl, and 3,3'-dimethoxy-4,4'-diaminobiphenyl.

[0114] Examples of the heterocyclic amine compounds include 1,4-diazacycloheptane, 1,11-diazacycloeicosane, and 1,15-diazacyclooctacosane.

[0115] Other examples of the amine curing agent (B2) include modified products of the above-mentioned amine compounds, for example, fatty acid modified products such as polyamidoamine, amine adducts with epoxy compounds, Mannich modified products (e.g., phenalkamine, phenalkamide) and epoxy adducts thereof, Michael adducts, ketimines, and aldimines.

[0116] As the other amine curing agent (B2), it is more preferable to include at least one amine curing agent (B2-a) selected from methylene-bridged poly(cyclohexyl-aromatic)amine (MPCA), 4,4'-methylenebis(cyclohexylamine) (PACM), Mannich-modified metaxylylenediamine (MXDA), 1,3-bis(aminomethyl)cyclohexane (1,3-BAC), and isophoronediamine (IPDA), from the viewpoint that it is possible to easily form a corrosion-resistant coating film that is excellent in a well-balanced manner in low-temperature curing, corrosion resistance, and discoloration resistance, and that is also excellent in oil resistance, solvent resistance, and chemical resistance, while still being a high-solids, low-viscosity corrosion-resistant coating composition. The inclusion of MPCA is particularly preferable from the viewpoint that it is possible to easily form a corrosion-resistant coating film that has higher oil resistance.

[0117] Furthermore, as the other amine curing agent (B2), phenalkamine, epoxy adducts of phenalkamine, and aliphatic amine curing agents other than the amine curing agent (B2-a) [e.g., "Ancamine 2719," "Ancamine 2738," "Ancamide 2353," "Ancamide 2830" (all manufactured by Evonik), "Daitoclar" (Daitoclar) and the like] are preferred, because they tend to be able to easily form a corrosion-protective coating film that is excellent in a well-balanced manner in low-temperature curing property, corrosion prevention property, and discoloration resistance, and that is excellent in flexibility and top-coat compatibility (e.g., adhesion to a top-coat film that can be formed on a corrosion-protective coating film formed from the present composition), while still being a high-solid, low-viscosity corrosion-protective coating composition. It is preferable to use at least one amine curing agent (B2-b) selected from the group consisting of "Acetone amine curing agent (B2-b)" (manufactured by Daito Sangyo Co., Ltd.), ... and norbornanediamine (NBDA) and, from the viewpoint of being able to easily form an anticorrosion coating film that is excellent in a good balance of low-temperature curing property, discoloration resistance, flexibility, oil resistance, solvent resistance, chemical resistance, corrosion prevention property and top-coat compatibility, while still being a high-solids, low-viscosity anticorrosion coating composition, it is more preferable to use at least one selected from the amine curing agents (B2-b) in combination with the amine curing agent (B2-a).

[0118] The methylene-bridged poly(cyclohexyl-aromatic)amine (MPCA) is described, for example, in U.S. Pat. No. 5,280,091, and specific examples include polyfunctional polyamines produced by hydrogenating oligomers obtained from the condensation of aniline and formaldehyde.

[0119] Specific examples of the Mannich-modified MXDA include Mannich-modified amines obtained by Mannich condensation of one or more phenols, one or more aldehydes, and m-xylylenediamine.

[0120] The other amine curing agent (B2) may be obtained by a conventionally known method, or a commercially available product may be used. When using a commercially available product, it is preferable to use a benzyl alcohol-free liquid amine curing agent in order to better demonstrate the effects of the present invention. Examples of commercially available benzyl alcohol-free liquid amine curing agents include "Ancamine 2738," "Ancamine 2264," "Ancamine 2167," "Ancamine 2422," "Ancamine 2089K," and "Ancamide 506" (all manufactured by Evonik), "NX-5567," and "Cardolite CM-5055" (manufactured by Cardolite Japan Co., Ltd.).

[0121] The other amine curing agent (B2) is not particularly limited, but is preferably liquid at room temperature, from the viewpoint of easily obtaining a high-solids present composition. The other amine curing agent (B2) being "liquid at room temperature" means that the viscosity measured with an E-type viscometer (rotation speed: 60 rpm) at 25°C is 1,000 Pa s or less. By using such other amine curing agent (B2), it is possible to reduce the amount of organic solvent used to adjust the viscosity to an appropriate viscosity for coating, and it is possible to easily obtain a high-solids present composition that has low viscosity and excellent coating workability.

[0122] When the present composition contains another amine curing agent (B2), the solids content of the other amine curing agent (B2) is more preferably in an amount within the following range. The solids content of the other amine curing agent (B2) is preferably 1 to 20 mass%, more preferably 5 to 15 mass%, based on 100 mass% of the non-volatile content of the present composition. The solids content of the other amine curing agent (B2) is preferably 40 to 95 mass%, more preferably 50 to 90 mass%, based on 100 mass% of the solids content of the second part. When the content of the other amine curing agent (B2) is within the above range, it is possible to easily form a corrosion-resistant coating film that is excellent in at least one property selected from oil resistance, solvent resistance, chemical resistance, corrosion prevention, flexibility, and topcoat compatibility.

[0123] When the present composition contains the amine curing agent (B2-a), the solids content of the amine curing agent (B2-a) is more preferably in an amount within the following range. The solids content of the amine curing agent (B2-a) is preferably 0.5% by mass or more, more preferably 1% by mass or more, and preferably 15% by mass or less, and more preferably 10% by mass or less, based on 100% by mass of the non-volatile content of the present composition. The solids content of the amine curing agent (B2-a) is preferably 3% by mass or more, more preferably 5% by mass or more, and preferably 60% by mass or less, and more preferably 40% by mass or less, based on 100% by mass of the solids content of the second part. When the content of the amine curing agent (B2-a) is within the above range, the anticorrosion coating composition is high-solid and low-viscosity, yet is excellent in a balanced manner in low-temperature curing properties, corrosion prevention, and discoloration resistance, and can easily form an anticorrosion coating film that is excellent in oil resistance, solvent resistance, chemical resistance, etc.

[0124] When the present composition contains the aliphatic amine curing agent (B2-b), the solids content of the aliphatic amine curing agent (B2-b) is more preferably in an amount within the following range. The solids content of the aliphatic amine curing agent (B2-b) is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 15% by mass or less, and more preferably 12% by mass or less, based on 100% by mass of the non-volatile content of the present composition. The solids content of the aliphatic amine curing agent (B2-b) is preferably 10% by mass or more, more preferably 15% by mass or more, and preferably 80% by mass or less, and more preferably 70% by mass or less, based on 100% by mass of the solids content of the second part. When the content of the aliphatic amine curing agent (B2-b) is within the above range, the anticorrosive coating composition is high-solid and low-viscosity, yet is able to easily form an anticorrosive coating film that is excellent in a well-balanced manner in low-temperature curing properties, corrosion prevention properties, and discoloration resistance, and that is excellent in flexibility and topcoat compatibility.

[0125] [Water] The second part contains water. Raw materials such as the amine curing agent (B) used in preparing the second part may contain water. When using such water-containing raw materials, it is not necessary to use water other than the water contained in the raw materials. However, in order to make the preparation of the second part easier, it is preferable to use additional water in the second part in addition to the water that may be contained in the raw materials such as the amine curing agent (B). The additional water is not particularly limited, and tap water or the like may be used, but ion-exchanged water, distilled water, or the like is preferably used.

[0126] The water content in the second part (including water that may be contained in raw materials such as the amine curing agent (B)) is not particularly limited as long as the content of nonvolatile matter in the composition is 85% by mass or more, but is preferably 3 to 45% by mass, more preferably 5 to 40% by mass, from the viewpoints of easily obtaining a composition having low viscosity and excellent coating workability, low-temperature curing properties, and discoloration resistance. Furthermore, the water content in the second part is preferably 50% by mass or more, more preferably 70 to 100% by mass, and particularly preferably 80 to 100% by mass, relative to 100% by mass of the total amount of the dispersion medium and solvent in the second part, from the viewpoints of easily obtaining a desired composition.

[0127] [Other Components] The second agent is not particularly limited as long as it contains water and the amine curing agent (B). If desired, it may contain other components such as rosins and / or monocarboxylic acid compounds, anti-sagging agents, pigments, (pigment) dispersants, non-reactive diluents, silane coupling agents, defoaming agents, and curing accelerators, as long as the effects of the present invention are not impaired. These other components may each be used alone or in combination of two or more. Conventionally known components may be used as the other components, and examples of the anti-sagging agents, pigments, (pigment) dispersants, non-reactive diluents, silane coupling agents, defoaming agents, and curing accelerators include the same components as those listed in the first agent section.

[0128] <Rosins and / or Monocarboxylic Acid Compounds> Examples of rosins include rosins such as gum rosin, wood rosin, and tall oil rosin; rosin derivatives such as hydrogenated rosin and disproportionated rosin; and esters and metal salts of the above rosins and rosin derivatives. Rosin is the residue remaining after distillation of pine resin, which is the sap of plants in the Pinaceae family, and is a natural resin whose main component is rosin acid (abietic acid, palustric acid, isopimaric acid, etc.).

[0129] Examples of the monocarboxylic acid compound include aliphatic or alicyclic monocarboxylic acids, monocarboxylic acid derivatives, and metal salts of the monocarboxylic acids or monocarboxylic acid derivatives. Specific examples of the monocarboxylic acid compound include naphthenic acid, cycloalkenylcarboxylic acid, bicycloalkenylcarboxylic acid, versatic acid, trimethylisobutenylcyclohexenecarboxylic acid, stearic acid, hydroxystearic acid, salicylic acid, and metal salts thereof.

[0130] When the present composition contains rosins and / or monocarboxylic acid compounds, the total content of the rosins and monocarboxylic acid compounds is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and even more preferably 0.1% by mass or more, relative to 100% by mass of the nonvolatile content of the present composition, and is preferably 5% by mass or less.

[0131] <Present Composition> The present composition is prepared from the present kit, specifically by mixing the first agent and the second agent.

[0132] The nonvolatile content of the composition, measured in accordance with ASTM D-5201-05, is 85% by mass or more, preferably 87% by mass or more, and more preferably 90% by mass or more. The upper limit is not particularly limited, but may be, for example, 99.9% by mass. The composition having a nonvolatile content within this range can be said to be a high-solids composition. When the nonvolatile content is within this range, the composition has excellent low-temperature curing properties, is less likely to sag during application, can form a thick film in a single application, and is easy to obtain, exhibiting excellent coating workability.

[0133] The content of volatile organic compounds (VOCs) in the composition is 100 g / L or less, preferably 90 g / L or less, and more preferably 80 g / L or less, in order to provide a composition that has little impact on the natural environment and the coating work environment.

[0134] The VOC content in the composition can be calculated from the following formula (2) using the values ​​of the composition specific gravity, nonvolatile content, and moisture content. The nonvolatile content is a value measured in accordance with ASTM D-5201-05, and the composition specific gravity and moisture content may be measured values ​​as described below or may be values ​​calculated from the raw materials used. VOC content (g / L) = composition specific gravity × 1000 × (100 - nonvolatile content - moisture content) / 100 (2)

[0135] Composition specific gravity (g / cm ３ ): A value calculated by filling a 100 mL density cup with the composition (the composition immediately after mixing the first and second agents (and the nth agent, if an nth agent is included) at a temperature of 23°C) and measuring the mass of the composition.

[0136] Non-volatile content (mass%): the content of non-volatile content in the composition (the composition immediately after mixing the first and second agents (and the nth agent if an nth agent is included)), measured in accordance with ASTM D-5201-05. In this specification, the "solid content" refers to the components (e.g., liquid epoxy resin (A)) that serve as raw materials for constituting the first and second agents, other than the non-reactive diluents, solvents, and dispersion media (e.g., water) in the first and second agents, each of which has a boiling point of less than 250°C under normal pressure.

[0137] Moisture content (mass%): the mass percentage of water contained in 100% by mass of the composition, measured by the Karl Fischer method

[0138] The content of water in the present composition is preferably 0.1 to 10 mass%, more preferably 0.2 to 6 mass%, even more preferably 0.3 to 5 mass%, and particularly preferably 0.5 to 2.5 mass%, based on 100 mass% of the present composition. When the water content is within the above range, it is possible to easily obtain a present composition that is excellent in low-temperature curing properties and discoloration resistance and has an appropriate pot life, even though it is a high-solids anticorrosion coating composition containing water.

[0139] The viscosity of this composition (the composition immediately after mixing the first and second parts (and the nth part, if an nth part is included)) measured at 23°C (60 rpm) using a No. 1 rotor of a Viscometer VT-04F (manufactured by Rion Co., Ltd.) is preferably 8,000 mPa s or less, more preferably 6,000 mPa s or less, and even more preferably 5,000 mPa s or less. There is no particular lower limit, but the viscosity is preferably 500 mPa s or more, more preferably 1,000 mPa s or more, and even more preferably 1,500 mPa s or more. According to one embodiment of the present invention, this composition can be easily obtained having a viscosity within these ranges and a non-volatile content within the above range. When the viscosity is within the above range, this composition can be easily obtained, exhibiting excellent handleability and sagging resistance, being applicable to a variety of desired coating methods without being limited by the coating method, and exhibiting excellent coating workability. Although the present composition may be diluted with a solvent or dispersion medium (e.g., water) before use depending on the coating method, etc., according to one embodiment of the present invention, the viscosity is within the above range even without dilution with a solvent or dispersion medium, and therefore coating is possible without dilution with a solvent or dispersion medium. Each explanation in this specification is about the composition before dilution with a solvent or dispersion medium.

[0140] The pot life of this composition at 23°C is preferably 70 minutes or less, more preferably 20 to 70 minutes, and even more preferably 20 to 60 minutes. This composition, which has a pot life within the above range, can be said to have excellent coating workability and a pot life short enough to allow coating, and also has excellent curing properties at 5°C (low temperature). Specifically, pot life is measured by the following method. Under conditions of 23°C and 50% RH, the viscosity (unit: mPa·s) of this composition immediately after preparation (the composition immediately after mixing the first and second parts (and the nth part, if an nth part is included)) is measured using a No. 1 rotor on a Viscometer VT-04F (manufactured by Rion Co., Ltd., rotation speed: 60 rpm), and this viscosity is defined as the initial viscosity. Thereafter, the viscosity of the composition is measured every 10 minutes after standing at 23°C and 50% RH, and the pot life is defined as the time (unit: minutes) immediately before the viscosity reaches more than twice the initial viscosity.

[0141] <<Method for Producing Anticorrosive Coating Composition>> A method for producing an anticorrosive coating composition according to one embodiment of the present invention (hereinafter also referred to as "the method") is a method for producing the composition, and includes the steps of: Step 1 of preparing a first agent using a liquid epoxy resin (A); Step 2 of preparing a second agent containing water using a polyoxyalkyleneamine (B1); and Step 3 of mixing the first agent and the second agent.

[0142] The method may also include a step of preparing an nth agent (n is 3 or more), in which case step 3 may be a step of mixing the first agent, the second agent, and the nth agent.

[0143] <Step 1> Step 1 is a step of preparing a first agent using a liquid epoxy resin (A). Step 1 is not particularly limited as long as a liquid epoxy resin (A) is used, and the liquid epoxy resin (A) itself may be used as the first agent (in this case, step 1 can also be said to be a step of using the liquid epoxy resin (A)), or the liquid epoxy resin (A) may be mixed with the other components, but the latter is preferred.

[0144] When step 1 is a step of mixing the liquid epoxy resin (A) with the other components, step 1 is specifically a step of mixing (or kneading) each component to be incorporated into the first agent. During this mixing (or kneading), each component may be added and mixed all at once, or may be added and mixed in multiple batches. For the mixing (or kneading), a conventionally known device such as a mixer, disperser, or stirrer can be used. Examples of such devices include a disperser, a mixing / dispersion mill, a mortar mixer, a roll, a paint shaker, and a homogenizer. The mixing (or kneading) may be performed while heating or cooling, depending on the season, environment, etc.

[0145] <Step 2> Step 2 is a step of preparing a second agent containing water using the polyoxyalkyleneamine (B1). In Step 2, the other components described above may be further used.

[0146] Specifically, step 2 is a step of mixing (or kneading) each component to be blended into the second agent, and during this mixing (or kneading), each component may be added and mixed all at once, or may be added and mixed in multiple batches.

[0147] The mixing (or kneading) can be carried out using a conventionally known device such as a mixer, disperser, or stirrer, and examples of such devices include a disperser, a mixing / dispersing mill, a mortar mixer, a roll, a paint shaker, and a homogenizer. The mixing (or kneading) may be carried out while heating or cooling depending on the season, environment, etc.

[0148] <Step 3> Step 3 is a step of mixing the first and second agents prepared in steps 1 and 2, respectively, with the nth agent being used as needed. The present composition can be produced by mixing (or kneading) the first and second agents and the nth agent, which is used as needed. The mixing (or kneading) can be performed using a conventionally known device such as a mixer, disperser, or stirrer, and examples of such devices include a disperser, a mixing / dispersion mill, a mortar mixer, a roll, a paint shaker, and a homogenizer. The mixing (or kneading) may be performed while heating or cooling, depending on the season, environment, etc.

[0149] <<Anti-corrosion coating film, substrate with anti-corrosion coating film>> The anti-corrosion coating film according to one embodiment of the present invention (hereinafter also referred to as "the present coating film") is formed using the present kit, and specifically, is formed from the present composition obtained from the present kit or the present composition produced by the present method. The present coating film is preferably used as a substrate with a anti-corrosion coating film (hereinafter also referred to as "substrate with the present coating film") comprising a substrate and the present coating film. The substrate with the present coating film is a laminate having the present coating film and a substrate.

[0150] The material of the substrate is not particularly limited, and examples thereof include steel (iron, steel, ferroalloy, carbon steel, mild steel, alloy steel, etc.), non-ferrous metals (zinc, aluminum, copper, brass, zinc plating, zinc thermal spraying, etc.), and stainless steel (SUS304, SUS410, etc.). When mild steel (SS400, etc.) is used as the substrate, it is desirable to perform surface preparation (e.g., adjustment so that the arithmetic mean roughness (Ra) is about 30 to 75 μm) by polishing the substrate surface by grit blasting or the like, as necessary. The substrate may also be a substrate that has been subjected to pretreatment such as cleaning or blasting to remove rust, dirt, paint (old paint film), etc. adhering to the substrate.

[0151] The substrate is not particularly limited, and the composition can be used without limitation on substrates that require corrosion resistance. However, in terms of the effects of using the composition of the present invention being more pronounced, preferred examples include (steel) structures such as ships, marine structures, plants, bridges, tanks, and containers.

[0152] The dry film thickness of the coating is not particularly limited, but is usually 10 to 500 μm, preferably 15 to 400 μm, in order to obtain a coating having sufficient anticorrosion properties.

[0153] The substrate with the coating film is a laminate comprising the coating film and a substrate, and may have an undercoat coating (primer coating) intended to improve adhesion to the substrate and corrosion resistance, an intermediate coating intended to improve corrosion resistance, and a topcoat coating intended to improve weather resistance and aesthetics. Specifically, when the composition is used as a substitute for a zinc primer, an intermediate coating and a topcoat coating may be formed on the coating film. Examples of the undercoat coating include coatings formed from various primer compositions such as epoxy resin-based coatings. Examples of the intermediate coating include coatings formed from various intermediate coating compositions such as (meth)acrylic resin-based, epoxy resin-based, and urethane resin-based coatings. Examples of the topcoat coating include coatings formed from various topcoat coating compositions such as (meth)acrylic resin-based, (meth)acrylic silicone resin-based, urethane resin-based, silicone resin-based, and fluororesin-based coatings. Furthermore, the composition of the composition may be changed to form an undercoat coating, intermediate coating, and topcoat coating using the composition.

[0154] <<Method for producing a substrate with a corrosion-protective coating>> A method for producing a substrate with a corrosion-protective coating according to one embodiment of the present invention includes the following steps I and II. Step I: A step of applying the composition obtained using the kit or the composition produced by the method to a substrate. Step II: A step of drying the composition applied to the substrate to form the coating.

[0155] <Step I> The coating method in Step I is not particularly limited, and examples thereof include conventionally known methods such as spray coating such as airless spray coating and air spray coating, brush coating, roller coating, etc. Among these, spray coating is preferred because it allows the effects of the present invention to be more effectively exhibited and allows for easy coating of large-area substrates such as the structure.

[0156] The spray coating conditions may be adjusted as appropriate depending on the desired dry film thickness. For example, in the case of airless spray coating, the following conditions are preferred: primary (air) pressure: approximately 0.3 to 0.6 MPa; secondary (paint) pressure: approximately 10 to 15 MPa; and gun movement speed: approximately 50 to 120 cm / sec.

[0157] The coating is preferably carried out so that the dry film thickness of the main coating film formed in step II falls within the above-mentioned range. In this case, the main coating film of the desired film thickness may be formed in one coating (single coating), or may be formed in two or more coatings (two or more coatings). Note that "two coatings" refers to performing steps I and II, and then performing step I on the coating film obtained in step II.

[0158] When applying the present composition to a substrate, it is preferable to treat the surface of the substrate as necessary (for example, by blasting (ISO8501-1 Sa2 1 / 2) or degreasing to remove oil and dust) in order to remove rust, oil, moisture, dust, salt, etc. from the substrate and to improve the adhesion of the resulting coating film to the substrate. Furthermore, the substrate may be coated with a shop primer or the like for the purpose of primary rust prevention.

[0159] <Step II> The drying conditions in Step II are not particularly limited and may be appropriately set depending on the coating film formation method, substrate type, application, coating environment, etc. However, the drying temperature is typically 10 to 35°C when drying at room temperature, and typically 30°C or higher but lower than 100°C, more preferably 40 to 80°C, when forced drying is performed using a hot air dryer or the like. The present composition can be dried and cured even at room temperature. In particular, the present composition can be cured at low temperatures (-10°C to lower than +10°C) to form the desired corrosion-protective coating film, thereby demonstrating its effectiveness as a corrosion-protective coating composition for use in winter (-10°C to lower than +10°C). The drying time varies depending on the coating film drying method, and is, for example, about 1 to 7 days when drying at room temperature, and about 5 to 60 minutes when forced drying is performed.

[0160] The present invention will be further described below with reference to examples, but the present invention is not limited to these examples.

[0161] Example 1 A first agent was prepared by placing 23.0 parts by mass of liquid epoxy resin A-1, 8.0 parts by mass of reactive diluent, 18.8 parts by mass of barium sulfate, 20.0 parts by mass of potassium feldspar, 10.0 parts by mass of talc, 8.0 parts by mass of titanium white, 8.0 parts by mass of silane coupling agent, 0.2 parts by mass of curing accelerator 1, 3.0 parts by mass of non-reactive diluent 1, and 1.0 part by mass of anti-sagging agent in a container and dispersing the mixture at room temperature (23°C) for 30 minutes using a high-speed disper. In a separate container, 4.0 parts by mass of amine curing agent B1-1, 5.0 parts by mass of amine curing agent B2-1, 2.0 parts by mass of amine curing agent B2-2, 2.0 parts by mass of amine curing agent B2-3, 2.0 parts by mass of amine curing agent B2-4, 0.5 parts by mass of curing accelerator 2, and 3.0 parts by mass of ion-exchanged water were placed and dispersed using a high-speed disper at room temperature (23°C) for 30 minutes to prepare a second part. Thereafter, 100 parts by mass of the first part prepared as described above and 18.5 parts by mass of the second part were mixed using a high-speed disper until uniform, thereby preparing an anticorrosion coating composition.

[0162] The components listed in Table 1 are described in Table 2.

[0163] Examples 2 to 10 and Comparative Examples 1 to 7 Anticorrosion coating compositions were prepared in the same manner as in Example 1, except that the components shown in Table 1 were used in the amounts (numbers, parts by mass) shown in Table 1.

[0164] [Nonvolatile Content] The nonvolatile content (amount of nonvolatile content in 100% by mass of the composition) in the prepared anticorrosion coating composition was measured in accordance with ASTM D-5201-05.

[0165] [VOC Content] The content of VOC in each prepared anticorrosive coating composition (VOC content) was calculated based on the above formula (2). The results are shown in Table 1.

[0166]

[0167]

[0168] [Appearance of Second Agent] The appearance of the prepared second agent was visually inspected and evaluated according to the following evaluation criteria. The results are shown in Table 3. (Evaluation criteria) ○: No turbidity, good. ×: Turbidity was observed.

[0169] [Viscosity] Using a Viscometer VT-04F (manufactured by Rion Co., Ltd.) with a No. 1 rotor, the viscosity (unit: mPa s) of the first agent (first agent immediately after preparation) and the anticorrosion coating composition (composition immediately after mixing the first agent and second agent) was measured at 23°C at a rotation speed of 60 rpm. The results are shown in Table 3.

[0170] [Curability] Each of the anticorrosion coating compositions obtained in Examples 1 to 10 and Comparative Examples 1 to 7 was applied to a glass plate measuring 348 mm x 25 mm x 2 mm (thickness) using a film applicator to a dry film thickness of approximately 160 μm. The time until the coating film was semi-cured and fully cured was measured at a temperature of 5°C using an RC-type drying time recorder (manufactured by Coating Tester Co., Ltd.). In this curability test, the test needle of the RC-type drying time recorder was slowly moved at a constant speed over the uncured coating film, and the condition of the coating film was determined from the trace left by the test needle, and the time until the coating film was semi-cured or fully cured was determined. The time from application of each anticorrosion coating composition until the glass plate was no longer visible in the test needle trace was defined as the time until semi-curing (T2), and the time until the test needle slid across the coating film surface and completely removed the trace was defined as the time until full curing (T3). The results are shown in Table 3.

[0171] [Corrosion Resistance (Cathode Corrosion Protection Test)] Each of the anticorrosion coating compositions obtained in Examples 1 to 10 and Comparative Examples 1 to 7 was applied to a sandblasted steel plate measuring 150 mm in length, 70 mm in width, and 1.6 mm in thickness so that the dry film thickness was approximately 320 μm, and then dried for 7 days under conditions of 23°C and 50% RH to prepare a test specimen with an anticorrosion coating. ２A zinc anode was connected as shown below, and a scribe was inserted laterally into the test specimen with the anticorrosion coating, reaching a depth from the anticorrosion coating side to the steel plate, and the specimen was immersed in 3% salt water at 40°C for 90 days, after which the length of peeling of the anticorrosion coating from the scribe was measured. The results are shown in Table 3. The shorter the length of peeling of the anticorrosion coating from the scribe, the better the corrosion protection.

[0172] [Outdoor Exposure Discoloration Test (Discoloration Resistance)] Each of the anticorrosion coating compositions obtained in Examples 1 to 10 and Comparative Examples 1 to 7 was applied to a 150 mm x 70 mm x 1.6 mm sandblasted steel plate to a dry film thickness of approximately 320 μm, and then dried for one day at 23°C and 50% RH to prepare test specimens with an anticorrosion coating film (initial coating film). Each test specimen was placed on an outdoor exposure stand (compliant with JIS K5600-7-6) on the premises of Chugoku Toryo Co., Ltd. in Otake City, Hiroshima Prefecture, at a 45° angle to the horizontal, with the anticorrosion coating surface exposed to sunlight, and exposed outdoors for seven days. The color difference (ΔE) between the initial coating film and the coating film after seven days of outdoor exposure was measured using a spectrophotometer CM-3700A (manufactured by Konica Minolta, Inc.) under conditions of illuminant C and a 2° field of view. The results are shown in Table 3. The smaller the value of the color difference (ΔE), the better the color fastness. The ΔE was measured by randomly selecting 10 points at least 1 cm away from the edge of the anticorrosive coating film on each test specimen, and measuring the L ＊ , a ＊ and b ＊ The average value was calculated, and the average value was used to calculate the following formula: ΔE={(L ＊ １ -L ＊ ０ ) ２ + (a ＊ １ -a ＊ ０ ) ２ +(b ＊ １ -b ＊ ０ ) ２} １／２ Here, L ＊ １ , a ＊ １ , b ＊１ is the L of the coating film after outdoor exposure ＊ , a ＊ , b ＊ and L ＊ ０ , a ＊ ０ , b ＊ ０ is the initial coating L ＊ , a ＊ , b ＊ Each represents the average value.

[0173]

[0174] As shown in Table 3, the second agent in one embodiment of the present invention had excellent appearance, and this composition, although a high-solids, low-viscosity anticorrosion coating composition containing water, was able to form an anticorrosion coating film that was excellent in balance between low-temperature curing properties, corrosion resistance, and discoloration resistance. The discoloration resistance in Table 3 can be compared between tests using similar curing agents, for example, between Example 1 and Comparative Example 1, and between Example 2 and Comparative Example 2.

Claims

1. An anticorrosion coating composition kit comprising a first part containing a liquid epoxy resin (A) and a second part containing an amine curing agent (B), wherein the second part contains water and a polyoxyalkyleneamine (B1) as the amine curing agent (B), the content of nonvolatile matter in the anticorrosion coating composition measured in accordance with ASTM D-5201-05 is 85 mass% or more, and the content of volatile organic compounds in the anticorrosion coating composition is 100 g / L or less.

2. The kit according to claim 1, wherein the liquid epoxy resin (A) comprises a bisphenol F type epoxy resin.

3. The kit according to claim 1, wherein the water content is 0.1 to 10 mass % relative to 100 mass % of the anticorrosion coating composition.

4. The kit according to claim 1, wherein the content of the polyoxyalkyleneamine (B1) is 5 to 60% by mass relative to 100% by mass of the solid content of the second agent.

5. The kit of claim 1, wherein the first agent further comprises a reactive diluent.

6. The kit according to claim 1, wherein the first agent further contains a silane coupling agent.

7. The kit of claim 1, wherein the anticorrosion coating composition contains a non-reactive diluent.

8. A method for producing an anticorrosion coating composition, comprising: step 1 of preparing a first agent using a liquid epoxy resin (A); step 2 of preparing a second agent containing water using a polyoxyalkyleneamine (B1); and step 3 of mixing the first agent and the second agent.

9. A corrosion-resistant coating film formed using the kit according to any one of claims 1 to 7.

10. A substrate with a corrosion-resistant coating, comprising a substrate and the corrosion-resistant coating according to claim 9.

11. A method for producing a substrate with a corrosion-resistant coating film, comprising the following steps I and II: Step I: applying to a substrate the corrosion-resistant coating composition obtained using the kit according to any one of claims 1 to 7; and Step II: drying the corrosion-resistant coating composition applied to the substrate to form a corrosion-resistant coating film.

Images