Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/54—Silicon-containing compounds
  • C08K5/541—Silicon-containing compounds containing oxygen
• • 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
  • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/02—Emulsion paints including aerosols
• • 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/08—Anti-corrosive paints
• • 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
  • C09D7/60—Additives non-macromolecular
  • C09D7/63—Additives non-macromolecular organic

Definitions

• One embodiment of the present invention relates to the anticorrosion composition 1, the anticorrosion paint composition, the anticorrosion coating, the substrate with the anticorrosion coating, or a method for producing the same.
• Base materials such as ships, offshore structures, plants, bridges, and land tanks are coated with solvent-based anti-corrosion paints for the purpose of long-term use.
• Patent Document 1 describes the use of a curing agent component containing a water-soluble amine resin and water.
• the anticorrosive coating composition obtained by mixing with the main component has a short pot life and , the anticorrosion coating film obtained after reaction with the main component does not have sufficient anticorrosion properties, and there is room for improvement in these respects.
• One embodiment of the present invention provides an anticorrosion composition 1 that can provide an anticorrosion paint composition with a long pot life and that can form an anticorrosion coating film with excellent anticorrosion properties.
• a configuration example of the present invention is as follows.
• an amine compound (A); a polyvalent carboxylic acid (B) having a valence of 2 or more; Anticorrosive composition 1 containing water (C).
• Anticorrosion composition 1 according to ⁇ 1>, wherein the amine compound (A) contains a water-dilutable amine compound.
• Anticorrosion composition 1 according to ⁇ 1> or ⁇ 2>, An anticorrosion paint composition containing an anticorrosion composition 2 containing a non-aqueous epoxy compound (D).
• a method for producing a substrate with an anticorrosive coating comprising the following steps [1] and [2]. [1] A step of coating the substrate with the anticorrosion coating composition according to any one of ⁇ 3> to ⁇ 6> [2] Drying the anticorrosion coating composition coated on the substrate to form an anticorrosion coating film forming process
• an anticorrosive composition 1 capable of obtaining an anticorrosive coating composition having a long pot life and forming an anticorrosive coating film having excellent anticorrosive properties.
• the anticorrosion composition 1 (hereinafter also referred to as "this composition 1") according to one embodiment of the present invention comprises an amine compound (A), a divalent or higher polyvalent carboxylic acid (B), and water (C) Although it is not particularly limited as long as it contains and, it may contain the following other components. Since this composition 1 is usually used when an amine compound reacts and cures, it can be said that it is a curing agent component of an anticorrosive coating composition containing a main component and a curing agent component, and is a curing agent for epoxy compounds. It is preferably a component, more preferably a curing agent component for non-aqueous epoxy compounds.
• the amine compound (A) is not particularly limited, and conventionally known amine compounds that have been used as curing agents such as epoxy compounds can be used.
• the amine compound (A) used in preparing the present composition 1 may be one kind or two or more kinds.
• the amine compound (A) is not particularly limited as long as it is an amine compound other than a tertiary amine (an amine compound having only a tertiary amino group), but an amine compound containing two or more amino groups in one molecule.
• Preferred are aliphatic, alicyclic, aromatic and heterocyclic amine compounds.
• Examples of the aliphatic amine compounds include alkylenepolyamines, polyalkylenepolyamines, and alkylaminoalkylamines.
• alkylenepolyamine examples include compounds represented by the formula: "H 2 N--R 1 --NH 2 " (where R 1 is a divalent hydrocarbon group having 1 to 12 carbon atoms). Specific examples include methylenediamine, ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7- Diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, trimethylhexamethylenediamine.
• polyalkylenepolyamine for example, the formula: "H 2 N-(C m H 2m NH) n H" (m is an integer of 1 to 10, n is an integer of 2 to 10, preferably 2 is an integer of to 6.)
• Specific examples include diethylenetriamine, dipropylenetriamine, triethylenetetramine, tripropylenetetramine, tetraethylenepentamine, tetrapropylenepentamine, pentaethylenehexamine, nonaethylenedecamine, bis(hexamethylene)triamine, triethylene-bis(trimethylene)hexamine.
• alkylaminoalkylamine examples include the formula: "R 2 2 N--(CH 2 ) p --NH 2 " (R 2 is 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, diethylamino Ethylamine, dibutylaminoethylamine, dimethylaminopropylamine, diethylaminopropylamine, dipropylaminopropylamine, dibutylaminopropylamine, dimethylaminobutylamine.
• Aliphatic amine compounds other than these include, for example, tetra(aminomethyl)methane, tetrakis(2-aminoethylaminomethyl)methane, 1,3-bis(2′-aminoethylamino)propane, tris(2- aminoethyl)amine, bis(cyanoethyl)diethylenetriamine, polyoxyalkylenepolyamine (especially diethylene glycol bis(3-aminopropyl)ether), bis(aminomethyl)cyclohexane, isophoronediamine (IPDA), menzenediamine (MDA), o -xylylenediamine, m-xylylenediamine (MXDA), p-xylylenediamine, bis(aminomethyl)naphthalene, bis(aminoethyl)naphthalene, 1,4-bis(3-aminopropyl)piperazine, 1-( 2′-aminoeth
• alicyclic amine compounds include cyclohexanediamine, diaminodicyclohexylmethane (especially 4,4′-methylenebiscyclohexylamine), 4,4′-isopropylidenebiscyclohexylamine, norbornanediamine, 2,4 -di(4-aminocyclohexylmethyl)aniline.
• aromatic amine compounds include aromatic polyamine compounds having two or more primary amino groups bonded to an aromatic ring such as a benzene ring or a naphthalene ring.
• aromatic amine compound include phenylenediamine, naphthalenediamine, diaminodiphenylmethane, 2,2-bis(4-aminophenyl)propane, 4,4′-diaminodiphenyl ether, 4,4′-diaminobenzophenone, 4,4'-diaminodiphenylsulfone, 3,3'-dimethyl-4,4'-diaminodiphenylmethane, diaminodiethylphenylmethane, 2,4'-diaminobiphenyl, 2,3'-dimethyl-4,4'-diamino biphenyl, 3,3'-dimethoxy-4,4'-diaminobiphenyl, diethylmethylbenzenedi
• heterocyclic amine compounds include 1,4-bis(3-aminopropyl)piperazine, 1,4-diazacycloheptane, 1-[2′-(2′′-aminoethylamino)ethyl ] piperazine, 1,11-diazacycloeicosane, and 1,15-diazacyclooctacosane.
• Examples of the amine compound (A) include modified amine compounds described above, such as fatty acid modified products such as polyamidoamine, amine adducts with epoxy compounds, and Mannich modified products (e.g., Mannich modified amines having a phenol-derived skeleton ( phenalkamine, phenalkamide, etc.)), Michael adducts, ketimine, and aldimine.
• modified amine compounds described above such as fatty acid modified products such as polyamidoamine, amine adducts with epoxy compounds, and Mannich modified products (e.g., Mannich modified amines having a phenol-derived skeleton ( phenalkamine, phenalkamide, etc.)), Michael adducts, ketimine, and aldimine.
• Mannich modified products e.g., Mannich modified amines having a phenol-derived skeleton ( phenalkamine, phenalkamide, etc.)
• Michael adducts
• amine compound (A) used in preparing the present composition a water-dilutable amine compound or a non-aqueous amine compound may be used. It is preferable to use a water-dilutable amine compound, and more preferably to use a water-dilutable amine compound and a non-aqueous amine compound.
• the raw material is It is a diluent amine compound.
• An amine compound having a solid content of less than 50% by mass is adjusted to a solid content of 50% by mass using an evaporator or the like.
• a non-aqueous amine compound refers to an epoxy-curable amine compound that is not freely miscible with water, and refers to an epoxy-curable amine compound that is substantially insoluble in water.
• the raw material of the amine compound used in preparing the present composition 1 and water were mixed so that the solid content was 3% by mass, and the mixture was sufficiently stirred and then heated at 23°C. If the mixture obtained by standing still for 1 hour is not in a homogeneous state and 90% by mass or more of the solid content of the raw material is separated, precipitated, or floating, the raw material is herein referred to as a non-aqueous amine compound.
• raw materials for amine compounds corresponding to water-dilutable amine compounds include water-soluble amine compounds, aqueous solutions of amine compounds, aqueous dispersions of amine compounds (eg, amine emulsions), and self-emulsifying amine compounds.
• an amine emulsion and/or a self-emulsifying amine compound in terms of ease of handling and ease of preparation of the present composition 1.
• an amine emulsion and a self-emulsifying amine compound can be selected from the viewpoint that an anticorrosion coating film having excellent anticorrosion properties and moisture resistance can be easily formed. It is preferable to use at least one selected and a non-aqueous amine compound, and it is more preferable to use an amine emulsion, a self-emulsifying amine compound and a non-aqueous amine compound.
• the amine emulsion examples include a hydrophilic amine obtained by reacting the amine compound with a glycidyl ether of polyalkylene glycol, a polyoxyalkylene amine, an epoxy compound, or the like, or a fatty acid and the amine compound.
• An amine having an amide structure obtained using or an amine imparted with the ability to emulsify by neutralizing the amine compound with an acid or mixing with an emulsifier is (forcibly) dispersed in water.
• the self-emulsifying amine compound is an amine compound that has the ability to emulsify by mixing with an aqueous medium, which will be described later, without mixing with an acid or an emulsifier.
• Specific examples include hydrophilic amines obtained by reacting the above amine compounds with polyalkylene glycol glycidyl ethers, polyoxyalkyleneamines, epoxy compounds, and the like, and using fatty acids and the above amine compounds.
• the obtained amines having an amide structure can be mentioned.
• the active hydrogen equivalent of the solid content of the amine emulsion and the self-emulsifying amine compound is preferably 50 or more, more preferably 50 or more, more preferably from the viewpoint that an anticorrosion coating film having excellent curability and anticorrosion properties can be easily formed. It is 60 or more, preferably 200 or less, more preferably 190 or less.
• the amine emulsion preferably contains at least one selected from polyamidoamine, an amine adduct with an epoxy compound, and a Mannich-modified amine having a phenol-derived skeleton, and a polyamidoamine and an amine adduct with an epoxy compound and/or It is more preferable to use together with a Mannich-modified amine having a phenol-derived skeleton.
• the self-emulsifying amine compound preferably contains polyamidoamine.
• the active hydrogen equivalent of the solid content of the amine adduct with the epoxy compound and the Mannich-modified amine having a phenol-derived skeleton is preferably It is 140 or more, more preferably 150 or more, preferably 200 or less, more preferably 190 or less.
• the active hydrogen equivalent of the solid content of the polyamidoamine is the solid content of the Mannich-modified amine having an amine adduct with the epoxy compound and a phenol-derived skeleton, from the viewpoint that the uniformly mixed present composition 1 can be easily obtained. It is preferably smaller than the active hydrogen equivalent of the minute, preferably 50 or more, more preferably 60 or more, preferably 130 or less, more preferably 120 or less.
• the amine emulsion is a dispersion (emulsion) in which an amine compound is dispersed in an aqueous medium.
• the aqueous medium is not particularly limited as long as it contains water, but the content of water in the aqueous medium is preferably 50 to 100% by mass, more preferably 60 to 100% by mass.
• the aqueous medium may contain a medium having a boiling point of less than 180° C. under normal pressure other than water.
• a medium having a boiling point of less than 180° C. under normal pressure other than water examples include acetone, methyl alcohol, ethyl alcohol, n-propyl alcohol, Isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, diacetone alcohol, dioxane, ethylene glycol Dimethyl ether, ethylene glycol diethyl ether, ethylene glycol monopropyl ether. These can be used alone or in combination of two or more.
• the amine emulsion can be prepared by emulsifying the amine compound with one or more surfactants to form an emulsion.
• amine emulsion and the self-emulsifying amine compound those obtained by conventionally known methods may be used, or commercially available products may be used.
• commercially available amine emulsions include "Epilink 701" (manufactured by Evonik) and "Cardolite NX-8401" (manufactured by Cardolite).
• commercially available self-emulsifying amine compounds include "Jointmide 3506" (manufactured by Yun Teh Industrial Co., Ltd.).
• the non-aqueous amine compound has a molecular weight of preferably 3, 3, 4, 5, 6, 6, 7, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 18, 18, 19, 20, 20, 20, 20, 20, 20, 20, etc., because it is possible to easily form an anticorrosion coating film having excellent anticorrosion properties and to easily obtain a low-viscosity anticorrosion coating composition. 000 or less, more preferably 2,500 or less, and an amine compound having a cyclic structure.
• the active hydrogen equivalent of the solid content of the non-aqueous amine compound is preferably 30 or more, more preferably 40 or more, from the viewpoint that an anticorrosion coating film having excellent curability and anticorrosion properties can be easily formed. It is preferably 200 or less, more preferably 150 or less.
• non-aqueous amine compound one produced by a conventionally known method may be used, or a commercially available product may be used.
• commercially available products include "Ancamine 2280" (manufactured by Evonik) and "ETHACURE 100plus” (manufactured by Albemarle).
• the solid content of the amine compound (A) is preferably based on the solid content of 100% by mass of the present composition 1, because it is possible to easily form an anticorrosion coating film having excellent anticorrosion properties and drying properties. is 70% by mass or more, more preferably 80% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less.
• the solid content of the water-dilutable amine compound can be used to easily form an anticorrosive coating film with excellent anticorrosive properties and drying properties. From the point of view, it is preferably 45% by mass or more, more preferably 50% by mass or more, preferably 95% by mass or less, more preferably 90% by mass or less, relative to 100% by mass of the solid content of the present composition 1. be.
• the amount of solid content of the amine emulsion used is From the point of view of being able to easily form an anticorrosion coating film with excellent drying properties, it is preferably 35% by mass or more, more preferably 40% by mass or more, relative to 100% by mass of the solid content of the composition 1, It is preferably 95% by mass or less, more preferably 90% by mass or less.
• the amount of the solid content of the self-emulsifying amine compound used facilitates the formation of an anti-corrosion coating film with excellent anti-corrosion properties and drying properties. preferably 15% by mass or more, more preferably 20% by mass or more, preferably 40% by mass or less, more preferably 40% by mass or less, more preferably is 35% by mass or less.
• the amount of solid content of the non-aqueous amine used is such that an anti-corrosion coating film having excellent anti-corrosion properties and drying properties can be easily formed. , preferably 10% by mass or more, more preferably 15% by mass or more, preferably 40% by mass or less, more preferably 35% by mass or less, relative to 100% by mass of the solid content of the present composition 1.
• the divalent or higher polyvalent carboxylic acid (B) is an organic acid having two or more carboxy groups in one molecule.
• the present composition 1 contains not an inorganic acid such as hydrochloric acid, nor a monovalent carboxylic acid such as acetic acid, but a polyvalent carboxylic acid (B) having a valence of 2 or more. and can easily form an anti-corrosion coating film with excellent anti-corrosion properties.
• the divalent or higher polyvalent carboxylic acid (B) used in preparing the present composition 1 may be one kind or two or more kinds.
• polycarboxylic acid (B) is not particularly limited, examples include oxalic acid, malonic acid, succinic acid, malic acid, tartaric acid, glutaric acid, adipic acid, maleic acid, and citric acid.
• malic acid, succinic acid, and tartaric acid are preferable because they can easily form anticorrosive coating films having excellent anticorrosive properties.
• the molecular weight of the polycarboxylic acid (B) is preferably 500 or less, more preferably 300 or less, and still more preferably 500 or less, more preferably 300 or less, from the viewpoint of easily obtaining an anticorrosive coating composition having an excellent balance between pot life and drying property. Preferably it is 200 or less.
• the amount of polycarboxylic acid (B) used in preparing the present composition 1 can easily obtain an anticorrosive coating composition with a long pot life and easily form an anticorrosive coating film with excellent anticorrosive properties. from the viewpoint of being able to Part by mass or less.
• polyvalent carboxylic acid ( The usage ratio of the number of functional groups in B) can be calculated from the following formula (1).
• the use ratio is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0.6 or less, more preferably 0.5 or less.
• Use ratio active hydrogen equivalent of solid content of amine compound (A) / amount of solid content of amine compound (A) used (parts by mass) x (amount of polyvalent carboxylic acid (B) used (parts by mass) x polyvalent Valence of carboxylic acid (B))/molecular weight of polycarboxylic acid (B) (g/mol) (1)
• Raw materials such as the amine compound (A) used in preparing the present composition 1 may contain water. For this reason, the water contained in the raw material may be used as water (C), but it is possible to facilitate the preparation of the present composition 1 and to easily obtain the present composition 1 having excellent storage stability. From this point of view, it is preferable that the present composition 1 further contains water (C) in addition to the water that can be contained in the raw materials such as the amine compound (A) used when preparing the present composition 1.
• Water (C) is not particularly limited, and tap water or the like may be used, but ion-exchanged water, deionized water, or the like is preferably used.
• the content of water in the present composition 1 (including water that may be contained in raw materials such as the amine compound (A) used in preparing the present composition 1) is not particularly limited, but is preferably 40% by mass or more. , more preferably 45% by mass or more, preferably 80% by mass or less, and more preferably 75% by mass or less. Further, the content of water in the present composition 1 is , preferably 50% by mass or more, more preferably 70 to 100% by mass, and particularly preferably 80 to 100% by mass.
• the present composition 1 is not particularly limited as long as it contains an amine compound (A), a divalent or higher polyvalent carboxylic acid (B) and water (C).
• Other ingredients such as pigments, pigment dispersants, anti-sagging agents (anti-settling agents, thixotropic agents), flash rust inhibitors, plasticizers, defoaming agents, curing accelerators, curing catalysts, film-forming aids, organic solvents, etc. may contain One of these other components may be used, or two or more thereof may be used.
• pigments such as pigments, anti-sagging agents (anti-settling agents, thixotropic agents), flash rust inhibitors, plasticizers, anti-foaming agents, film-forming aids, organic solvents.
• anti-sagging agents anti-settling agents, thixotropic agents
• flash rust inhibitors such as rust inhibitors, plasticizers, anti-foaming agents, film-forming aids, organic solvents.
• plasticizers such as those described in the column of composition 2 below.
• anti-foaming agents such as those described in the column of composition 2 below.
• composition A An anticorrosive coating composition according to one embodiment of the present invention (hereinafter also simply referred to as “this composition A”) is an anticorrosive composition 2 containing a non-aqueous epoxy compound (D) (hereinafter simply referred to as “composition 2" ) and the present composition 1.
• composition 2 a non-aqueous epoxy compound
• the present composition A is a two-component or more composition containing the above composition 2 and the present composition 1.
• the present composition A may be a three or more-component composition containing an n-th agent (n is 1 or more) other than the composition 2 and the present composition 1, but a two-component composition is preferably
• the composition 2 and the present composition 1, etc. are generally stored, stored, transported, etc. in separate containers, and mixed together immediately before the use of the present composition A. That is, the composition A is a composition obtained by mixing the composition 2, the composition 1 and, if necessary, the n-th agent.
• the composition 2, the present composition 1 and the n-th agent can be said to be components of a kit for preparing the present composition A.
• the present composition A is the composition 2 and It can be said that it is a kit for an anticorrosive paint composition containing the present composition 1.
• the non-volatile content of the present composition A can be calculated according to ISO3233:1998, and is preferably 65% by volume or more, more preferably 70% by volume or more, still more preferably 75% by volume or more, although the upper limit is not particularly limited, it is, for example, 90% by volume.
• a composition having a non-volatile content within the above range can be said to be a high-solids composition.
• the non-volatile content of the present composition A is in the above range, it is preferable because it has excellent drying properties, does not easily cause sagging during coating, can form a thick film with one coating, and has excellent coating workability. .
• composition 2 is not particularly limited as long as it contains the non-aqueous epoxy compound (D), but may contain the following other components, and preferably contains the following other components.
• the composition 2 is used as a constituent material of the present composition A together with the present composition 1, which can also be referred to as a curing agent component, and therefore can be referred to as a main agent component.
• Composition 2 may or may not contain water.
• the content of the water is preferably less than the amount at which the composition 2 can be an emulsion of the non-aqueous epoxy compound (D). is preferably 35% by mass or less, more preferably 25% by mass or less, relative to 100% by mass of the solid content of the non-aqueous epoxy compound (D).
• Non-aqueous epoxy compound (D) “Non-aqueous” in the non-aqueous epoxy compound (D) refers to a state in which it is not freely miscible with water, and refers to a state in which it is substantially insoluble in water. Specifically, at 23°C, an epoxy compound and water are mixed so that the concentration of the epoxy compound is 3% by mass, and the mixture is sufficiently stirred and allowed to stand at 23°C for 1 hour. is not in a uniform state, and 90% by mass or more of the epoxy compound mixed with water separates, precipitates, or floats, the epoxy compound is defined as a non-aqueous epoxy compound (D).
• the number of non-aqueous epoxy compounds (D) used in preparing composition 2 may be one, or two or more.
• the epoxy compound In the mixed liquid, when more than 10% by mass of the epoxy compound mixed with water is stably present in water and the mixed liquid is kept in an emulsion state, the epoxy compound is A water-dilutable epoxy compound. Further, in the mixed liquid, more than 10% by mass of the epoxy compound mixed with water is stably present in water, and a laser diffraction particle size distribution measuring device (eg, Mastersizer 3000 (Spectris Co., Ltd.) If the epoxy compound is present with an average particle size of less than 10 nm as measured in (Production)), it is regarded as a water-soluble epoxy compound.
• a laser diffraction particle size distribution measuring device eg, Mastersizer 3000 (Spectris Co., Ltd.
• non-aqueous epoxy compound (D) it is preferable to use a liquid epoxy compound that is liquid at 23°C.
• a liquid epoxy compound can be used even when Composition 2 is a composition containing a relatively small amount of solvent and contains components other than the non-aqueous epoxy compound (D). It is preferable because it is easy to disperse uniformly and has good reactivity with the amine compound (A) in the present composition 1.
• Non-aqueous epoxy compounds include, for example, bisphenol A-type epoxy resin, bisphenol F-type epoxy resin, glycidyl ester-type epoxy resin, glycidylamine-type epoxy resin, novolac-type epoxy resin, cresol-type epoxy resin, dimer acid-modified epoxy resin, fat group epoxy resins, alicyclic epoxy resins, epoxidized oil-based epoxy resins, alkyl monoglycidyl ethers, alkyl monoglycidyl esters, alkyl diglycidyl ethers, alkyl diglycidyl esters, alkylphenol monoglycidyl ethers, polyglycol monoglycidyl ethers, polyglycols Diglycidyl ethers may be mentioned.
• preferred examples of the alkyl group include alkyl groups having 3 to 15 carbon atoms, and specific examples include alkyl groups such as a neopentyl group and a 2-ethylhexyl group.
• an epoxy compound particularly an epoxy resin, which is liquid at 23° C. and has a bisphenol skeleton can be used because it can easily form an anticorrosive coating film with excellent adhesion to the substrate. It is more preferable to use a bisphenol A type or bisphenol F type epoxy resin that is liquid at 23 ° C., and it is more preferable to use a bisphenol A type epoxy resin that is liquid at 23 ° C. and a bisphenol F type epoxy that is liquid at 23 ° C. It is more preferable to use together with resin.
• the number-average molecular weight of the non-aqueous epoxy compound (D) is preferably 500 or less, more preferably 400 or less, from the viewpoint that it is possible to easily obtain an anticorrosive coating composition that is high solid and has excellent coating workability. be.
• non-aqueous epoxy compound (D) a compound synthesized by a conventionally known method may be used, or a commercially available product may be used.
• commercially available products that are liquid at 23° C. include “E-028” (manufactured by Ohtake Meishin Chemical Co., Ltd.), “jER 828” (manufactured by Mitsubishi Chemical Corporation), and “Cardura E10P” ( Hexion Co., Ltd.) and "ADEKA RESIN EP-4901" (ADEKA Co., Ltd.).
• the solid content of the non-aqueous epoxy compound (D) is preferably 15% by mass or more, more preferably 20% by mass or more, and preferably 35% by mass, based on 100% by mass of the non-volatile matter of the composition A. 30% by mass or less, more preferably 30% by mass or less.
• the solid content of the non-aqueous epoxy compound (D) is preferably 15% by mass or more, more preferably 20% by mass or more, and preferably 40% by mass with respect to 100% by mass of the solid content of the composition 2. % or less, more preferably 35 mass % or less.
• the non-volatile content (% by mass) of the present composition A is the present composition A (the composition immediately after mixing the present composition 1 and composition 2 (with the n-th agent when containing the n-th agent)) 1 ⁇ 0.1 g is weighed into a flat-bottomed dish, spread evenly with a wire of known mass, dried at 23°C for 24 hours, and then heated at a heating temperature of 125°C for 1 hour (under normal pressure). (Non-volatile content) and the mass percentage value calculated by measuring the mass of the wire.
• each component eg, amine compound (A)
• the composition 2 or the present composition 1 under normal pressure
• a component other than a solvent having a boiling point of less than 180° C. and a dispersion medium eg, water
• the non-aqueous epoxy compound (D) preferably has a reaction ratio calculated by the following formula (2). is 0.3 or more, more preferably 0.4 or more, preferably 1.5 or less, more preferably 1.2 or less.
• Reaction ratio ⁇ (blended amount of solid content of amine compound (A)/active hydrogen equivalent of solid content of amine compound (A)) + (solid content of component reactive with non-aqueous epoxy compound (D)) Amount of the non-aqueous epoxy compound (D) solid content functional group equivalent of the component having reactivity with the non-aqueous epoxy compound (D)) ⁇ / ⁇ (Amount of the solid content of the non-aqueous epoxy compound (D) / non-aqueous epoxy compound ( D) solid content epoxy equivalent) + (solid content content of component reactive with amine compound (A) / solid content functional group of component reactive with amine compound (A) equivalent) ⁇ (2)
• examples of the “component reactive with the non-aqueous epoxy compound (D)” in the formula (2) include carboxylic acid and a silane coupling agent described later, and the "amine compound (A)
• examples of the “component reactive to” include a polycarbodiimide compound and a silane coupling agent, which will be described later.
• the silane coupling agent it is possible to use a silane coupling agent having an amino group or an epoxy group as a reactive group. It is necessary to determine whether it has reactivity with respect to the non-aqueous epoxy compound (D) and calculate the reaction ratio.
• the "functional group equivalent" of each component means the mass (g) per 1 mol functional group obtained by subtracting the number of moles of functional groups contained therein from the mass of 1 mol of these components.
• Composition 2 is not particularly limited as long as it contains a non-aqueous epoxy compound (D), and may optionally contain a polycarbodiimide compound, a silane coupling agent, a pigment, a pigment dispersant, a sauce, as long as the effects of the present invention are not impaired.
• Other components such as a stopper (antisettling agent, thixotropic agent), flash rust inhibitor, plasticizer, antifoaming agent, dehydrating agent, film forming aid, organic solvent, etc. may be included.
• a stopper antisettling agent, thixotropic agent
• flash rust inhibitor plasticizer
• antifoaming agent dehydrating agent
• film forming aid organic solvent, etc.
• the polycarbodiimide compound is not particularly limited as long as it is a compound having two or more carbodiimide groups in one molecule, and known compounds can be used.
• the composition 2 containing the polycarbodiimide compound together with the present composition 1 containing the polycarboxylic acid (B), it is possible to easily form an anticorrosion coating film having excellent anticorrosion properties.
• a polycarbodiimide compound can be obtained by a decarboxylation condensation reaction of a diisocyanate compound using a known synthesis method.
• the diisocyanate compound is not particularly limited, but may be a chain or alicyclic aliphatic isocyanate compound, an aromatic isocyanate compound or a heterocyclic isocyanate compound. may be used.
• chain aliphatic diisocyanates such as tetramethylene diisocyanate, hexamethylene diisocyanate, dodecamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate; 1,4-bis(isocyanatomethyl)cyclohexane, 2,2 - Alicyclic diisocyanates such as bis(4-isocyanatocyclohexyl)propane, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate; including aromatic rings such as 1,3-bis(2-isocyanato-2-propyl)benzene Aliphatic diisocyanates; toluene-2,4-diisocyanate,
• the polycarbodiimide compound may be a polycarbodiimide compound having an isocyanate group at the end, and the polycarbodiimide compound having the isocyanate group at the end is a known end blocking agent having a substituent that reacts with the isocyanate group. Terminal isocyanate groups are preferably blocked by the reaction. Examples of the substituent include hydroxyl group, carboxyl group, amino group and isocyanate group.
• a commercial product may be used as the polycarbodiimide compound, and examples of the commercial product include the Carbodilite series (manufactured by Nisshinbo Chemical Co., Ltd.).
• the solid content of the polycarbodiimide compound is preferably 0.1% by mass or more, more preferably 0.1% by mass or more, more preferably It is 0.5% by mass or more, preferably 8% by mass or less, and more preferably 6% by mass or less.
• the composition 2 contains a polycarbodiimide compound
• the solid content of the polycarbodiimide compound is preferably 0.1% by mass or more, more preferably 0.1% by mass or more, more preferably It is 0.5% by mass or more, preferably 10% by mass or less, and more preferably 8% by mass or less.
• silane coupling agent By using a silane coupling agent, it is possible not only to further improve the adhesion of the obtained anticorrosion coating film to the substrate, but also to improve the moisture resistance, salt water resistance, etc. of the obtained anticorrosion coating film and heat resistance. can also be improved.
• the silane coupling agent is not particularly limited, and conventionally known compounds can be used. A compound that can contribute to a decrease or the like is preferable.
• the silane coupling agent has, for example, the formula: "X-SiMen Y 3-n " [n is 0 or 1, X is a functional group capable of reacting with an organic substance (e.g., amino group, vinyl group, epoxy group, A mercapto group, a halogeno group, a group in which part of a hydrocarbon group is substituted with these groups, or a group in which a part of a hydrocarbon group is substituted with an ether bond, etc., is partially substituted with these groups group), Me is a methyl group, and Y is a hydrolyzable group (eg, an alkoxy group such as a methoxy group or an ethoxy group). ] It is preferable that it is a compound represented by.
• the X is an epoxy group, a group in which a part of the hydrocarbon group is substituted with an epoxy group, or a group in which a part of the hydrocarbon group is substituted with an ether bond or the like, and a part of the group is substituted with an epoxy group.
• It is preferably an epoxy group-containing silane coupling agent, which is a group formed by When this composition A contains an epoxy group-containing silane coupling agent, the silane coupling agent is preferably added to composition 2.
• silane coupling agent examples include 3-glycidoxypropyltrimethoxysilane “KBM-403” (manufactured by Shin-Etsu Chemical Co., Ltd.), “Sila Ace S-510” (manufactured by JNC Corporation).
• the content of the silane coupling agent is preferably 0.1% by mass or more, more preferably 0, based on 100% by mass of the nonvolatile content of the present composition A. .3% by mass or more, preferably 10% by mass or less, more preferably 5% by mass or less.
• the viscosity of the present composition A can be reduced, so that not only the coating workability is improved, but also the adhesion of the obtained anticorrosion coating film to the substrate, anticorrosion properties and Improves heat resistance.
• the present composition A may contain a pigment, and preferably contains a pigment.
• the pigments include extender pigments, coloring pigments, and antirust pigments, and may be organic or inorganic.
• extender pigment examples include talc, mica, (precipitated) barium sulfate, (potassium) feldspar, kaolin, alumina white, bentonite, wollastonite, clay, glass flakes, aluminum flakes, magnesium carbonate, barium carbonate, and carbonate.
• Talc, mica, silica, (precipitated) barium sulfate, and (potassium) feldspar are particularly preferred.
• the content of the extender pigment is preferably 5% by mass or more, more preferably 10% by mass or more, relative to 100% by mass of the non-volatile matter of the present composition A, It is preferably 80% by mass or less, more preferably 70% by mass or less.
• coloring pigment examples include inorganic pigments such as carbon black, titanium dioxide (titanium white), iron oxide (red iron oxide), yellow iron oxide, scale-like iron oxide, and ultramarine blue, and organic pigments such as cyanine blue and cyanine green. mentioned. Titanium white, carbon black, and rouge are particularly preferred.
• the content of the coloring pigment is preferably 0.1% by mass or more, more preferably 1% by mass or more, relative to 100% by mass of the nonvolatile matter of the composition A. Yes, preferably 30% by mass or less, more preferably 20% by mass or less.
• antirust pigment examples include zinc powder, zinc alloy powder, zinc phosphate-based compound, calcium phosphate-based compound, aluminum phosphate-based compound, magnesium phosphate-based compound, zinc phosphite-based compound, calcium phosphite-based compound, Examples include aluminum phosphite compounds, strontium phosphite compounds, aluminum tripolyphosphate compounds, molybdate compounds, zinc cyanamide compounds, borate compounds, nitro compounds, and composite oxides.
• the content of the antirust pigment is preferably 0.5% by mass or more, more preferably 1% by mass, based on 100% by mass of the nonvolatile matter of the composition A. or more, preferably 20% by mass or less, more preferably 10% by mass or less.
• the pigment volume concentration (PVC) in the present composition A makes it possible to easily obtain an anticorrosive coating composition having excellent coating workability, and adhesion to the substrate due to stress relaxation It is preferably 25% or more, more preferably 30% or more, preferably 45% or less, more preferably 40% or less, from the viewpoint that an anticorrosion coating film having excellent resistance and anticorrosion properties can be easily formed. be.
• PVC refers to the total volume concentration of pigments relative to the volume of the non-volatile matter of Composition A.
• PVC can be obtained from the following formula.
• PVC [%] total volume of all pigments in this composition A ⁇ 100 / volume of non-volatile content of this composition A
• the volume of the non-volatile matter of the present composition A can be calculated from the mass and true density of the non-volatile matter of the present composition A.
• the mass and true density of the non-volatile matter may be measured values or values calculated from 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 raw materials used. For example, it can be calculated by separating the pigment and other components from the non-volatile matter of the present composition A and measuring the mass and true density of the separated pigment.
• the anti-sagging agent is not particularly limited, but is a material that can suppress the sedimentation of pigments and the like in the present composition A and improve its storage stability, or the anti-sagging agent of the present composition A during or after coating.
• a material capable of improving the stopping property is preferable.
• anti-sagging agents include organic clay waxes such as stearate salts of Al, Ca and Zn, lecithin salts and alkylsulfonates, polyethylene waxes, amide waxes, hydrogenated castor oil waxes, hydrogenated castor oil waxes and amides.
• Conventionally known waxes such as mixtures of waxes, synthetic finely divided silica, and polyethylene oxide waxes can be used.
• amide wax, synthetic finely divided silica, polyethylene oxide waxes, and organoclay waxes are preferred.
• a commercially available product may be used as such an anti-sagging agent.
• the commercially available product include "Disparlon 305", “Disparlon 4200-20", “Disparlon 6650” and “Disparlon” manufactured by Kusumoto Kasei Co., Ltd. AQ600", “AS-A T-250F” manufactured by Ito Seiso Co., Ltd., "Flowon RCM-300” manufactured by Kyoeisha Chemical Co., Ltd., “RHEOBYK 420” manufactured by BYK Chemie Japan Co., Ltd., Elementis Specialties , Inc. "Benton SD-2", Nippon Aerosil Co., Ltd. "Aerosil R972", Arkema Coating Resins Co., Ltd. , Ltd. "Crayvallc Optima” manufactured by
• the solid content of the anti-sagging agent is preferably 0.1 to 10% by mass based on 100% by mass of the non-volatile content of the composition A.
• the flash rust inhibitor is not particularly limited, but when the present composition A is applied to an active steel surface or the like, it is caused by the elution of iron ions from the steel surface or the like during the drying process immediately after coating. It is preferable that the material is capable of suppressing rust formation and flash rust in which the rust or the like emerges from the surface of the coating film.
• the flash last inhibitor examples include nitrites such as sodium nitrite, potassium nitrite, calcium nitrite, strontium nitrite, barium nitrite, and ammonium nitrite; sodium benzoate, potassium benzoate, calcium benzoate, and benzoic acid; Benzoates such as ammonium; Phytates such as sodium phytate and potassium phytate; Fatty acid salts such as sebacic acid and dodecanoic acid; Phosphoric acid derivatives such as alkyl phosphoric acid and polyphosphoric acid; ;N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), propylenediaminetetraacetic acid (PDTA), iminodiacetic acid, nitrilotriacetic acid (NTA), diethylenetriamine Amine-based chelating agents such as pentamethylene phospho
• Flash last inhibitor Commercially available products may be used as the flash last inhibitor, and examples of such commercial products include “Cheleslite W-410” and “Cheleslite W-16B” (manufactured by Chelest Co., Ltd./organic acid salt). , “HALOX FLASH-X 150” (manufactured by ICL Advanced Additives-Hammond/nitrite and benzoate).
• the solid content of the flash last inhibitor is preferably 0.01% by mass or more, relative to 100% by mass of the non-volatile content of the present composition A. It is preferably 0.05% by mass or more, preferably 5% by mass or less, and more preferably 3% by mass or less.
• the present composition A may contain a plasticizer in order to improve the flexibility of the resulting anticorrosion coating film.
• a plasticizer conventionally known ones can be widely used, such as liquid hydrocarbon resins such as low boiling point fractions obtained by pyrolyzing naphtha, petroleum resins solid at 23° C., xylene resins, coumarone-indene resins, and the like. is mentioned. Specific examples include liquid hydrocarbon resins and flexibility imparting resins described in JP-A-2006-342360.
• liquid hydrocarbon resins are preferable, and phenol-modified hydrocarbon resins are more preferable, from the viewpoint of good compatibility with the non-aqueous epoxy compound (D).
• phenol-modified hydrocarbon resin include diolefins contained in cracked oil fractions of petroleum and coal, as described in JP-A-9-268209 and JP-A-7-196793. Examples thereof include resins obtained by copolymerizing monoolefins or ⁇ -methylstyrene with phenols (phenolic compounds).
• the phenol-modified hydrocarbon resin includes a C5 (aliphatic) petroleum resin made from a C5 fraction; a C9 (aromatic) petroleum resin made from a C9 fraction; Copolymerized petroleum resin; dicyclopentadiene resin made from dicyclopentadiene obtained by thermally dimerizing cyclopentadiene contained in C5 fraction; ⁇ -methylstyrene; mentioned.
• resins obtained by addition polymerization of styrene, vinyltoluene, coumarone, indene, ⁇ -methylstyrene, and the like contained in cracked oil fractions of petroleum and coal with phenols are preferable.
• the average molecular weight of the phenol-modified hydrocarbon resin is usually 200-1000, and the viscosity is usually 30-10,000 mPa ⁇ s/25°C.
• liquid hydrocarbon resin examples include "Necileth EPX-L” and “Necileth EPX-L2” (manufactured by NEVCIN / phenol-modified hydrocarbon resins), “Hirenol PL-1000S” (manufactured by Kolon Industries, Inc./phenol-modified hydrocarbon resin).
• the solid content of the plasticizer is 100% by mass of the nonvolatile content of the present composition A from the viewpoint of obtaining an anticorrosive coating film having excellent crack resistance and the like. is preferably 1% by mass or more, more preferably 3% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less.
• the present composition A can suppress the generation of bubbles during the production or coating of the composition, or can break the bubbles generated in the present composition A, and the anticorrosion coating film with desired physical properties. It is preferable to contain an antifoaming agent from the viewpoint that the can be easily formed.
• Commercially available products may be used as the antifoaming agent, and examples of such commercial products include “BYK-392”, “BYK-066N”, and “BYK-1790” (all manufactured by BYK-Chemie Japan Co., Ltd.). , “TEGO Airex 902W” (manufactured by Evonik), and “Spectrasyn 40” (manufactured by Exxonmobil Chemical Company).
• the solid content of the antifoaming agent is such that the generation of foam can be sufficiently suppressed, and an anticorrosion coating film having desired physical properties can be easily formed. From the point of view, it is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, preferably 1% by mass or less, more preferably 0.5% by mass, based on 100% by mass of the nonvolatile content of the present composition A. % by mass or less.
• the composition A contains water, the composition may freeze in winter, and from the viewpoint of improving the film-forming properties at low temperatures and the finished appearance of the resulting coating film. , preferably contains a film forming aid.
• those commonly used in aqueous coating compositions such as organic compounds having a boiling point of 180° C. or higher under normal pressure, can be used. or branched aliphatic alcohols; alcohols having an aromatic ring such as benzyl alcohol; monoethers such as (poly)ethylene glycol or (poly)propylene glycol; (poly)ethylene glycol ether esters; (poly)propylene glycol ether esters;
• the content thereof is the non-volatile content of the present composition A 100 It is preferably 1% by mass or more, more preferably 2% by mass or more, preferably 10% by mass or less, and more preferably 8% by mass or less.
• Organic solvent is not particularly limited as long as it is an organic solvent having a boiling point of less than 180°C under normal pressure.
• ether solvents such as butyl cellosolve, ester solvents such as butyl acetate, alcohol solvents such as isopropanol, isobutyl alcohol, n-butanol, methoxypropanol, n-hexane, n-octane, 2,2 , 2-trimethylpentane, isooctane, n-nonane, cyclohexane, and methylcyclohexane.
• the content of the organic solvent is preferably 1% by mass or more, more preferably 2% by mass or more, and preferably 10% by mass with respect to 100% by mass of the composition 2 % or less, more preferably 5 mass % or less.
• the present composition 1 and the composition 2 can be prepared by mixing (kneading) each component to be blended in these compositions. You may add and mix, and you may add and mix in multiple times.
• the present composition A can be prepared by mixing (kneading) the present composition 1, composition 2, and the n-th agent used as necessary.
• devices such as conventionally known mixers, dispersers, and stirrers can be used. is mentioned.
• the mixing (kneading) may be performed while heating or cooling depending on the season, environment, and the like.
• An anticorrosive coating film according to an embodiment of the present invention (hereinafter also referred to as “main coating film”) is formed using the present composition A, and a substrate with an anticorrosive coating film according to an embodiment of the present invention ( Hereinafter also referred to as “substrate with main coating film”) is a laminate having a main coating film and a base material.
• the material of the base material is not particularly limited, and examples include iron and steel (iron, steel, ferroalloy, carbon steel, mild steel, alloy steel, etc.), non-ferrous metals (zinc, aluminum, copper, brass, zinc plating, zinc spraying etc.), and stainless steel (SUS304, SUS410, etc.).
• iron and steel iron, steel, ferroalloy, carbon steel, mild steel, alloy steel, etc.
• non-ferrous metals zinc, aluminum, copper, brass, zinc plating, zinc spraying etc.
• stainless steel SUS304, SUS410, etc.
• the surface of the substrate is polished by grit blasting, etc.
• the base material may be a base material which has undergone a pretreatment such as cleaning treatment or blasting treatment to remove rust, dirt, paint (old coating film), etc. adhering to the base material.
• the substrate is not particularly limited, and can be used without limitation for substrates that require corrosion resistance. , offshore structures, plants, bridges, tanks, containers, and other (steel) structures.
• the dry film thickness of the present coating film is not particularly limited, it is usually 10 ⁇ m or more, preferably 15 ⁇ m or more, and usually 400 ⁇ m or less, preferably 300 ⁇ m or less, in order to obtain a coating film having sufficient anticorrosion properties. is.
• the base material with this coating film is a laminate containing the main coating film and the base material.
• An intermediate coating film for the purpose of improvement and a top coating film excellent in weather resistance and appearance may be formed.
• the present composition A when used as a substitute for a zinc primer, an intermediate coating film or a top coating film may be formed on the present coating film.
• the undercoating film include coating films formed from various primer compositions such as epoxy resins.
• the intermediate coating film include coating films formed from various intermediate coating compositions such as (meth)acrylic resin-based, epoxy resin-based, and urethane resin-based intermediate coating compositions.
• topcoat film there are coating films formed from various topcoat paint compositions such as (meth)acrylic resin, (meth)acrylic silicon resin, urethane resin, silicone resin, and fluororesin. mentioned. Further, the composition of the composition A may be changed to form an undercoat film, an intermediate coating film and a topcoat film.
• topcoat paint compositions such as (meth)acrylic resin, (meth)acrylic silicon resin, urethane resin, silicone resin, and fluororesin. mentioned.
• the composition of the composition A may be changed to form an undercoat film, an intermediate coating film and a topcoat film.
• a method for producing a substrate with an anticorrosion coating film according to one embodiment of the present invention includes the following steps [1] and [2]. Step [1]: Step of coating the present composition A on a substrate Step [2]: Step of drying the present composition A coated on the substrate to form an anticorrosion coating film
• the coating method in step [1] 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, and roller coating. Among these, spray coating is preferable from the viewpoint that it is possible to easily coat large-area substrates such as the structures described above. At the time of such coating, it is preferable to coat so that the dry film thickness of the resulting coating film is within the above range.
• the conditions of the spray coating may be appropriately adjusted according to the desired dry film thickness.
• primary (air) pressure about 0.3 to 0.6 MPa
• secondary (paint ) Pressure preferably about 10 to 15 MPa
• gun moving speed about 50 to 120 cm/sec.
• the coating is preferably carried out so that the dry film thickness of the main coating film formed in step [2] is within the above range.
• the main coating film having the desired thickness may be formed by one coating (one coating), and the main coating film having the desired thickness may be formed by two or more coatings (two or more coatings). good too.
• two-time coating means performing step [1] on the coating film obtained in step [2] after performing steps [1] and [2].
• the substrate surface In order to remove rust, oil, moisture, dust, salt content, etc. on the substrate when the present composition A is applied onto the substrate, and to improve the adhesion of the resulting coating film to the substrate. If necessary, it is preferable to subject the substrate surface to treatment (for example, blast treatment (ISO8501-1 Sa2 1/2), treatment to remove oil and dust by degreasing), and the like. Further, the substrate may be coated with a shop primer or the like for the purpose of primary rust prevention.
• blast treatment ISO8501-1 Sa2 1/2
• the substrate may be coated with a shop primer or the like for the purpose of primary rust prevention.
• the drying conditions in the step [2] are not particularly limited, and may be appropriately set according to the method of forming the coating film, the type of substrate, the application, the coating environment, etc.
• the drying temperature is The temperature is usually 5 to 35°C, and when forced drying is performed using a hot air dryer or the like, the temperature is usually 30 to 100°C, more preferably 40 to 80°C.
• the composition can be dried and cured even by drying at room temperature.
• the drying time differs depending on the drying method of the coating film, and is, for example, about 1 to 7 days in the case of normal temperature drying, and about 5 to 60 minutes in the case of forced drying.
• Example 1 In a container, as shown in Table 1, 10 parts by mass of a non-aqueous epoxy compound (Note 1), 16 parts by mass of a non-aqueous epoxy compound (Note 2), and 5.4 parts by mass of a liquid hydrocarbon resin (Note 3) , 4 parts by mass of methoxypropanol, 4 parts by mass of benzyl alcohol, 3 parts by mass of red iron oxide (Note 4), 36 parts by mass of potassium feldspar (Note 5), 15 parts by mass of talc (Note 6), and barium sulfate (Note 7) 5 parts by mass, 1 part by mass of silane coupling agent (Note 8), 0.3 parts by mass of anti-sagging agent (Note 9), and 0.3 parts by mass of antifoaming agent (Note 10) The mixture was stirred at room temperature (23° C.) using a high-speed disper until uniform, and then dispersed at 55-60° C. for 30 minutes. Then, the composition 2 was prepared by
• composition 1 was prepared.
• An anticorrosive coating composition was prepared by mixing the prepared composition 2 and composition 1 at the mixing ratio (mass ratio) shown in Table 1 before coating.
• Examples 2 to 17 and Comparative Examples 1 to 17 An anticorrosive coating composition was prepared in the same manner as in Example 1 except that each component listed in Table 1, Table 2A or Table 2B was used in the amount (parts by mass) listed in Table 1, Table 2A or Table 2B. did. A description of each component listed in Tables 1, 2A and 2B is provided in Table 3.
• the anticorrosive coating composition prepared as described above was applied to the surface of a steel plate similar to the steel plate used for test plate 1 using an air spray so that the dry film thickness was 80 ⁇ m.
• the anticorrosive coating composition coated on the steel plate was dried at 60°C for 30 minutes, and then dried at 23°C for 7 days to prepare test plate 2.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Dispersion Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Paints Or Removers (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=83458828

Family Applications (1)

Country Status (4)

Cited By (2)

Citations (5)

Family Cites Families (6)

• 2022
  • 2022-03-24 WO PCT/JP2022/014090 patent/WO2022210286A1/ja not_active Ceased
  • 2022-03-24 JP JP2023511135A patent/JP7611366B2/ja active Active
  • 2022-03-24 KR KR1020237036189A patent/KR20230160352A/ko active Pending
  • 2022-03-24 CN CN202280018174.3A patent/CN116981743B/zh active Active
• 2024
  • 2024-12-23 JP JP2024226281A patent/JP2025036478A/ja active Pending

Patent Citations (5)

Also Published As

Similar Documents

Legal Events