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WO2021066055A1 - Composition de revêtement en deux constituants, et article revêtu - Google Patents

Composition de revêtement en deux constituants, et article revêtu Download PDF

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Publication number
WO2021066055A1
WO2021066055A1 PCT/JP2020/037276 JP2020037276W WO2021066055A1 WO 2021066055 A1 WO2021066055 A1 WO 2021066055A1 JP 2020037276 W JP2020037276 W JP 2020037276W WO 2021066055 A1 WO2021066055 A1 WO 2021066055A1
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WO
WIPO (PCT)
Prior art keywords
coating composition
coating film
coating
main agent
component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/037276
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English (en)
Japanese (ja)
Other versions
WO2021066055A8 (fr
Inventor
聡 齋藤
晃司 山田
弘二 吉川
貴公 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Toryo Co Ltd
Original Assignee
Dai Nippon Toryo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dai Nippon Toryo Co Ltd filed Critical Dai Nippon Toryo Co Ltd
Priority to JP2021551407A priority Critical patent/JP7075545B2/ja
Priority to CN202080067946.3A priority patent/CN114450363B/zh
Publication of WO2021066055A1 publication Critical patent/WO2021066055A1/fr
Publication of WO2021066055A8 publication Critical patent/WO2021066055A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/41—Organic pigments; Organic dyes
    • 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
    • C09D7/61—Additives non-macromolecular inorganic

Definitions

  • the present invention relates to a two-component coating composition and a water-based coating composition, a coating film and a coating material obtained from the two-component coating composition.
  • a plastic molded product is a molded product of a polymer substance having plasticity, and is used for mobile phones, home appliances, OA equipment, etc., and the surface of the plastic molded product is decorated or given a function. May be painted to. Therefore, the paint for painting plastic (paint for plastic) not only decorates, but also has abrasion resistance, discoloration resistance, skin oil resistance, and high gloss resistance, depending on the application of the plastic molded product. It may be required to impart functions such as high weather resistance and electrical insulation.
  • lactic acid which is a component of sweat, hand cream, sunscreen, sun oil, etc. It is required to have excellent resistance (lactic acid resistance) and resistance to oleic acid (oleic acid resistance), which is a component contained in sebum.
  • oleic acid resistance resistance to oleic acid
  • solvent-based lacquer paints and solvent-based two-component curable urethane paints have been used as paints for automobile interiors.
  • environmental regulations have become stricter, the paint industry is shifting from solvent-based paints that use organic solvents to water-based paints that use water.
  • a coating film having sufficient lactic acid resistance and olein acid resistance could not be obtained.
  • An object of the present invention is to provide an aqueous coating composition capable of forming a coating film having excellent lactic acid resistance and olein acid resistance.
  • the above problem is the molar ratio of the hydroxyl group (OH) in the main agent and the isocyanate group (NCO) in the curing agent of the main agent containing polycarbonate polyurethane, polyester resin and water and the curing agent containing a hydrophilic polyisocyanate compound. It was found that this can be solved by blending so that is in a specific range. That is, the present invention relates to the following [1] to [14].
  • a two-component coating composition containing a main agent and a curing agent.
  • the main agent contains (A) polycarbonate-based polyurethane, (B) polyester resin, and water, and the (A) polycarbonate-based polyurethane has an average particle size of 0.01 to 0.1 ⁇ m, and the (B) The polyester resin has an average particle size of 0.01 ⁇ m or less and has an average particle size of 0.01 ⁇ m or less.
  • the curing agent contains (C) a hydrophilic polyisocyanate compound.
  • the molar ratio NCO / OH of the isocyanate group (NCO) in the (C) hydrophilic polyisocyanate compound and the hydroxyl group (OH) in the (A) polycarbonate-based polyurethane and the (B) polyester resin is 1.6 to. 2.0 Two-component paint composition.
  • the present invention is a two-component coating composition containing a main agent and a curing agent.
  • the main agent contains (A) polycarbonate-based polyurethane, (B) polyester resin, and water, and the (A) polycarbonate-based polyurethane has an average particle size of 0.01 to 0.1 ⁇ m, and the (B) The polyester resin has an average particle size of 0.01 ⁇ m or less and has an average particle size of 0.01 ⁇ m or less.
  • the curing agent contains (C) a hydrophilic polyisocyanate compound.
  • the molar ratio NCO / OH of the isocyanate group (NCO) in the (C) hydrophilic polyisocyanate compound and the hydroxyl group (OH) in the (A) polycarbonate-based polyurethane and the (B) polyester resin is 1.6 to. 2.0 It is a two-component paint composition.
  • the main agent of the present invention contains a polycarbonate-based polyurethane. Since polyurethane has urethane bonds, urea bonds, etc. inside, it is composed of hard segments strongly aggregated by strong hydrogen bonds and flexible soft segments composed of polyester or polyol portions.
  • the polycarbonate-based polyurethane means a polyurethane in which the polyol forming the soft segment is a polycarbonate polyol.
  • the polycarbonate polyol forming the soft segment can be obtained, for example, by reacting carbonates such as dialkyl carbonates with glycol, and has a polyol having two or more carbonate groups and hydroxyl groups in a molecular chain having a molecular weight of 500 to 3000.
  • carbonates include dimethyl carbonate, diethyl carbonate, di-n-propyl carbonate, diisopropl carbonate, dibutyl carbonate, di-t-butyl carbonate, diamil carbonate, dihexyl carbonate, dicyclohexyl carbonate, and diheptyl carbonate. , Dioctyl carbonate, dicyclopropyl carbonate and the like.
  • glycols examples include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, and 1,8-octane.
  • the polycarbonate-based polyurethane exists as dispersed particles having an average particle size of 0.01 to 0.1 ⁇ m, preferably 0.015 to 0.07 ⁇ m, and more preferably 0.02 to 0.05 ⁇ m.
  • the average particle size can be measured by a dynamic light scattering method, a laser diffraction method, or the like.
  • Polycarbonate polyurethane preferably has a hydroxyl value of 100 to 300 mgKOH / g, more preferably 150 to 250 mgKOH / g, and even more preferably 180 to 220 mgKOH / g.
  • the hydroxyl value means a value corresponding to the mass (mg) of KOH required to neutralize 1 g of the sample.
  • a coating film having appropriate reactivity with the (C) hydrophilic polyisocyanate compound in the curing agent and having excellent lactic acid resistance and olein acid resistance can be formed.
  • Examples of commercially available polycarbonate-based polyurethanes include DPU2035ba (manufactured by Daicel Ornex), Nipponran 976 (manufactured by Tosoh), NeoRez R4000 (manufactured by DSM Coating Resins), and the like.
  • the content of the polycarbonate-based polyurethane in the main agent is, for example, 16 to 32% by mass, preferably 18 to 27% by mass, based on the total mass of the main agent.
  • a coating film having excellent lactic acid resistance and olein acid resistance can be formed.
  • polyester resin is a resin obtained by polycondensing a polycarboxylic acid and a polyol.
  • Polycarboxylic acids include phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, cyclohexanedicarboxylic acid, adipic acid, azelaic acid, sebacic acid, glutaric acid, chlorendic acid, tetrachlorophthalic acid, maleic acid.
  • Phthalic acid, itaconic acid, malonic acid, suberic acid, 2-methylsuccinic acid, 3,3-diethylglutaric acid, 2,2-dimethylsuccinic acid, octenyl succinic acid, dodecenyl succinic acid, etc. May use these anhydrides in place of the carboxylic acids described above.
  • the polyol include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, polyalkylene glycol (for example, polyethylene glycol), 1,2-propanediol, 1,3-propanediol, and 1,2-butanediol.
  • the type of polyester resin can be appropriately determined according to the type of polycarbonate-based polyurethane used. By using a polyester resin having good compatibility with polycarbonate-based polyurethane, a high-gloss coating film can be formed.
  • the polyester resin has an average particle size of 0.01 ⁇ m or less, for example 0.001 to 0.01 ⁇ m. If the average particle size is within the above range, it is stably dissolved in water.
  • the average particle size can be measured by a dynamic light scattering method, a laser diffraction method, or the like.
  • the polyester resin preferably has a hydroxyl value of 100 to 200 mgKOH / g, more preferably 120 to 180 mgKOH / g.
  • a coating film having excellent lactic acid resistance and olein acid resistance can be formed.
  • the polyester resin is preferably an amine-neutralized water-soluble polyester resin because it can form a coating film having excellent lactic acid resistance and olein acid resistance.
  • polyester resins examples include Resinol AN6617, AN6481, Steel 6306, and Setaqua BE270 (manufactured by Daicel Ornex).
  • the content of the polyester resin in the main agent is, for example, 5 to 15% by mass, preferably 6 to 13% by mass, based on the total mass of the main agent. When the content is within the above range, a coating film having excellent lactic acid resistance and olein acid resistance can be formed.
  • the solid content mass ratio of the polycarbonate polyurethane (component A) and the polyester resin (component B) is preferably 8: 2 to 6: 4, and is 75: 25 to 65:35. Is more preferable.
  • the solid content mass ratio of (A): (B) is within the above range, the crosslink density and surface free energy of the coating film formed from the coating composition of the present invention can be within the desired range.
  • a coating film having excellent lactic acid resistance and olein acid resistance can be formed.
  • the main agent of the present invention contains water.
  • the content of water in the main agent is, for example, 30 to 70% by mass, preferably 40 to 60% by mass, based on the total mass of the main agent.
  • a water-based paint having a reduced adverse effect on the environment can be obtained as compared with the conventional solvent-based paint.
  • the curing agent of the present invention contains a hydrophilic polyisocyanate compound.
  • the hydrophilic polyisocyanate contains a hydrophilic group having an affinity for water and a hydrophobic portion, and in water, the hydrophobic portions gather to form a micellar structure, so that the hydrophilic polyisocyanate can be easily and stably dispersed. Therefore, when mixed with the main agent, the reaction between isocyanate and water can be suppressed, and the cross-linking of the polycarbonate-based polyurethane and the polyester resin can be promoted.
  • hydrophilic group examples include an alkoxypolyalkyleneoxy group (for example, 2 to 50 carbon atoms), a carboxyl group, a sulfo group, and salts thereof (for example, a metal salt, an ammonium salt, and an amine salt).
  • an alkoxypolyalkyleneoxy group for example, 2 to 50 carbon atoms
  • carboxyl group for example, a carboxyl group
  • a sulfo group examples of the hydrophilic polyisocyanate
  • salts thereof for example, a metal salt, an ammonium salt, and an amine salt.
  • a polyisocyanate having a sulfo group forming an ammonium salt or the like can be preferably used.
  • an HMDI-based polyisocyanate is preferable.
  • the isocyanate group content of the hydrophilic polyisocyanate compound is preferably 10 to 30%, more preferably 15 to 25%, and even more preferably 19 to 22%.
  • the isocyanate group content represents the amount of isocyanate groups in the polyisocyanate compound as a mass fraction, and can be measured according to JIS K1603-1.
  • a coating film having excellent lactic acid resistance and olein acid resistance can be formed by reaction with the main agent.
  • the acid value of the hydrophilic polyisocyanate compound is preferably 0 to 30 mgKOH / g, more preferably 5 to 15 mgKOH / g. When the acid value is within the above range, a coating film having excellent lactic acid resistance and olein acid resistance can be formed.
  • hydrophilic polyisocyanates for example, BASF2655, 3100, 302, 304, 305, XP2451 / 1, XP2487 / 1, XP2457, 401, XP2759 manufactured by Sumika Covestro Urethane, etc.
  • WB40, WT30, WT20, WL70, WR80, etc. and BASF's Basonat HW1000, HW2000, etc.
  • the coating composition of the present invention is a two-component coating composition containing a main agent and a curing agent.
  • the molar ratio NCO / OH is 1.6 to 2.0, preferably 1.7 to 1.9, and more preferably 1.8.
  • the crosslink density of the coating film formed by using the coating composition of the present invention can be within a desired range, and excellent lactic acid resistance and olein acid resistance can be obtained. Is given.
  • the molar ratio NCO / OH is the amount of NCO calculated from the hydroxyl values of (A) polycarbonate polyurethane and (B) polyester resin and the isocyanate group content of (C) hydrophilic polyisocyanate compound. Can be derived as the molar ratio of.
  • the coating composition of the present invention may contain a pigment.
  • the pigment include a coloring pigment, an extender pigment, a metal pigment and the like, and the pigment can be appropriately selected and used according to the coloring and gloss of the coating film, the coating workability, the strength of the coating film, the physical properties and the like.
  • Known materials can be used as the coloring pigment, and examples thereof include inorganic pigments such as titanium oxide and carbon black, and organic pigments such as phthalocyanine pigments and azo pigments.
  • known materials can be used as the extender pigment, and examples thereof include talc, mica, barium sulfate, clay, and calcium carbonate.
  • metal pigments include bright pigments or scaly pigments such as aluminum powder pigments, nickel powder pigments, gold powders, silver powders, bronze powders, copper powders, stainless powder pigments, mica (mica) pigments, graphite pigments, glass flake pigments, and the like.
  • bright pigments or scaly pigments such as aluminum powder pigments, nickel powder pigments, gold powders, silver powders, bronze powders, copper powders, stainless powder pigments, mica (mica) pigments, graphite pigments, glass flake pigments, and the like.
  • examples thereof include metal-coated glass powder, metal-coated mica powder, metal-coated plastic powder, and scaly iron oxide pigments.
  • the pigment can be blended in either the main agent or the curing agent, but it is preferably blended in the main agent.
  • the coating composition of the present invention contains additives commonly used in the coating industry, such as solvents, pH adjusters, surface adjusters, wetting agents, dispersants, emulsifiers, and additives.
  • Absorbents, antistatic agents, conductivity-imparting agents and the like can be appropriately blended according to the purpose.
  • silica particles into a coating composition a coating film having a matte feeling can be formed.
  • These optional components may be blended in either the main agent or the curing agent, or may be blended in both.
  • the two-component coating composition of the present invention can be prepared according to a conventional method.
  • each raw material may be uniformly mixed to prepare a main agent and a curing agent separately.
  • a water-based coating composition is prepared by mixing a main agent and a curing agent immediately before coating.
  • the coating method using the two-component coating composition of the present invention includes a step of mixing a main agent and a curing agent to obtain an aqueous coating composition, a step of applying the aqueous coating composition to the surface of a base material, and a step of applying the applied aqueous coating.
  • the step of drying the coating composition to form a coating film is included.
  • Conventionally known mixing means can be used for mixing the main agent and the curing agent without particular limitation.
  • the mixing ratio of the main agent and the curing agent can be appropriately adjusted by an amount such that the molar ratio NCO / OH in the aqueous coating composition immediately after mixing is 1.6 to 2.0.
  • the method for applying the water-based coating composition is not particularly limited, and known coating methods such as dipping method, spin coating method, flow coating method, roll coating method, spray coating method, blade coating method and air knife coating method are used. And so on. When applying the aqueous coating composition, it may be diluted with water to adjust the viscosity.
  • the coating amount of the water-based coating composition can be changed depending on the type and application of the base material, but is usually 54 to 81 g / m 2 , preferably 64 to 75 g / m 2.
  • the film thickness of the coating film formed on the surface of the base material depends on the coating amount of the aqueous coating composition, but is preferably 25 to 45 ⁇ m, for example, 30 to 40 ⁇ m. When the film thickness is within the above range, a coating film having sufficient lactic acid resistance and olein acid resistance can be obtained without requiring an excessive curing time.
  • the drying means is not particularly limited, and for example, it may be dried by heating, or it may be naturally dried at room temperature (for example, about 25 ° C.). It is preferable to combine both heating and natural drying. For example, it is preferably dried at 70 to 90 ° C., preferably 85 ° C. to 95 ° C. for 20 to 40 minutes, preferably 25 to 35 minutes, and then further dried at room temperature for 48 hours or more, preferably 60 to 80 hours. .. Such drying conditions are sufficient to form a coating film having the intended performance.
  • the coating film formed is, for example, a crosslink of 1.4 ⁇ 10 -3 to 1.7 ⁇ 10 -3 mol / mL, preferably 1.5 ⁇ 10 -3 to 1.7 ⁇ 10 -3 mol / mL.
  • the crosslink density can be determined based on the flat region storage elastic modulus measured under predetermined conditions using RSA-G2 (manufactured by TA instruments) and its absolute temperature, based on the following formula.
  • n E'/ 3RT n: Crosslink density (mol / mL) (1 / n: Molecular weight between crosslinks) R: Gas constant (8.31 ⁇ 106 Pa ⁇ cc / mol ⁇ K) T: Absolute temperature (K) of flat area storage elastic modulus E': Flat area storage modulus (Pa)
  • the coating film preferably has a surface free energy calculated from the Owns-Wendt equation of 50 mN / m or more, for example, 60 to 80 mN / m.
  • the Owns-Wend formula is one of the theoretical formulas of the surface free energy shown below, and the unknown surface free energy ( ⁇ d S + ⁇ p S ) of a solid is used as two kinds of liquids whose surface free energy is known.
  • the coating film corresponds to a solid in which the surface free energy in the formula is unknown, and the two liquids for measuring the contact angle correspond to liquids in which the surface free energy in the formula is known.
  • the base material to which the water-based coating composition is applied is not particularly limited, and various types and shapes can be selected depending on the use of the base material.
  • the base material include olefin-based polymers such as PPE (polyphenylene ether) resin, polystyrene-based resin, polypropylene and polyethylene; polycarbonate resin; acrylic resin such as polymethylmethacrylate and plastic base material such as ABS resin. ..
  • the present invention also relates to a coating material containing a base material and a coating film on the surface of the base material, and the coating film is formed by coating the above-mentioned water-based coating composition of the present invention.
  • the coating composition of the present invention can be applied to various substrates such as various inorganic substances, metals, woods, and plastics. Since the coating material of the present invention is excellent in lactic acid resistance and olein acid resistance, it is a plastic molded product that comes into contact with human skin or hands for a long time, specifically, interior and exterior members of automobiles and motorcycles, audio equipment. It is particularly useful for parts for home appliances such as video and television, and parts for office equipment such as mobile phones, printers, and personal computers.
  • ⁇ Paint preparation> The raw materials of the main agent were mixed according to the formulations shown in Table 1 and stirred with a disper for 10 minutes to prepare the main agents of Examples 1 to 3 and Comparative Examples 1 to 5.
  • the polycarbonate-based polyurethane was present as dispersed particles having an average particle size of 30 nm, and the polyester resin was dissolved in water.
  • each curing agent was added to the prepared main agent according to the formulation shown in Table 1, and the mixture was further stirred with a disper for 5 minutes to prepare the aqueous coating compositions of Examples 1 to 3 and Comparative Examples 1 to 5, respectively.
  • Each water-based coating composition prepared above is diluted with deionized water to a viscosity suitable for spray coating, and then coated on an ABS-PC resin plate by air spray coating so that the thickness of the dry coating film is 30 ⁇ 5 ⁇ m. Then, it was dried at 80 ° C. for 30 minutes, and further allowed to stand at room temperature for 72 hours to obtain each test piece.
  • ⁇ Appearance evaluation> The presence or absence of coating film abnormalities such as bumps, cracks, wrinkles, repellents, peelings, and blisters was visually confirmed.
  • ⁇ Adhesiveness evaluation> According to JIS K 5600-5-6 (cross-cut method), make a notch of 2 mm square grid 10 x 10 squares in the coating film after painting, attach cellophane tape to the grid, and peel it off rapidly. After that, the number of Goban-grained coating films remaining on the coated surface was evaluated. ⁇ : No peeling coating film ⁇ : Part of the coating film is missing along the notch ⁇ : The coating film is peeled off
  • the coating composition of the present invention is particularly useful as a coating material for interior and exterior members of automobiles and motorcycles, members for home appliances such as audio, video and television, and members for office equipment such as mobile phones, printers and personal computers. ..

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention fournit une composition de revêtement aqueuse qui permet de former un film de revêtement doté d'excellentes propriétés en termes de résistance à l'acide lactique et de résistance à l'acide oléique.　Selon l'invention, un agent principal contenant un polyuréthane à base de polycarbonate et une résine polyester, et un agent de durcissement contenant un composé polyisocyanate hydrophile, sont mélangés de sorte que le rapport molaire d'un groupe hydroxyle (OH) contenu dans l'agent principal et d'une group isocyanate(NCO) contenu dans l'agent de durcissement, se trouve dans une plage prédéfinie.
PCT/JP2020/037276 2019-09-30 2020-09-30 Composition de revêtement en deux constituants, et article revêtu Ceased WO2021066055A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021551407A JP7075545B2 (ja) 2019-09-30 2020-09-30 ２液型塗料組成物及び塗装物
CN202080067946.3A CN114450363B (zh) 2019-09-30 2020-09-30 二液型涂料组合物和涂装物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019179026 2019-09-30
JP2019-179026 2019-09-30

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WO2021066055A1 true WO2021066055A1 (fr) 2021-04-08
WO2021066055A8 WO2021066055A8 (fr) 2021-10-07

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Citations (6)

* Cited by examiner, † Cited by third party
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