WO2017154036A1 - Plaque revêtue et son procédé de fabrication - Google Patents

Plaque revêtue et son procédé de fabrication Download PDF

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Publication number
WO2017154036A1
WO2017154036A1 PCT/JP2016/001232 JP2016001232W WO2017154036A1 WO 2017154036 A1 WO2017154036 A1 WO 2017154036A1 JP 2016001232 W JP2016001232 W JP 2016001232W WO 2017154036 A1 WO2017154036 A1 WO 2017154036A1
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Prior art keywords
parts
primer
resin
coating
mass
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PCT/JP2016/001232
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English (en)
Japanese (ja)
Inventor
野村　広正
知成 浜村
秀明 那須
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日鉄住金鋼板株式会社
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Priority to JP2018503843A priority Critical patent/JP6557775B2/ja
Priority to PCT/JP2016/001232 priority patent/WO2017154036A1/fr
Publication of WO2017154036A1 publication Critical patent/WO2017154036A1/fr

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    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • 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

Definitions

  • the present invention relates to a painted plate. More specifically, the present invention relates to a coated plate having excellent finish, low gloss, high diffuse reflectance, and adhesion.
  • Reference 1 Japanese Patent Laid-Open No. 2003-236981 discloses a coated steel sheet having a high reflectance.
  • This coated steel sheet is provided with two or more coating films on at least one side through a ground treatment layer on a zinc-based plated steel sheet.
  • the coating film contains 30 g / m 2 or more of titanium dioxide white pigment per side.
  • the surface shape of the coating film has a waviness wavelength of 100 ⁇ m or more and 3,500 ⁇ m or less and a waviness height of 0.5 ⁇ m or more.
  • Reference 2 International Publication No. 2012/076172 pamphlet discloses a pre-coated metal plate for a reflector.
  • This pre-coated metal plate for a reflector comprises a visible light reflective undercoat film containing 3 to 30 ⁇ m in thickness containing a binder resin and titanium oxide, and a 10 to 10 film thickness containing a binder resin containing a fluororesin and titanium oxide thereon. It has a visible light reflective topcoat of 40 ⁇ m.
  • the addition amount of titanium oxide in the visible light reflective undercoat film is 40 to 150 parts by mass with respect to 100 parts by mass of the binder resin solid content.
  • the addition amount of titanium oxide in the visible light reflective overcoat is 40 to 150 parts by mass with respect to 100 parts by mass of the binder resin solid content.
  • Document 3 Japanese Patent Laid-Open No. 2005-169857 discloses a coated metal plate having an undercoat film and an overcoat film.
  • this coated metal plate at least one of the undercoat and the overcoat contains 0.5 to 10% by mass of thermosetting resin particles having an average particle size of 5 to 50 ⁇ m in addition to titania.
  • Document 4 Japanese Patent Laid-Open No. 2006-192660 discloses a coating material having a high diffuse reflectance.
  • This coating material is a material having a coating layer on at least a part of the surface, and a high pigment concentration layer containing a white pigment of 150 parts or more and less than 1500 parts with respect to 100 parts of the binder in the coating layer. Have at least one layer.
  • Reference 5 Japanese Patent Laid-Open No. 2007-290293 discloses a coated substrate.
  • This coated substrate has a coating layer on at least a part of the substrate surface, the coating layer is composed of at least two layers, the outermost layer has a film thickness of 20 ⁇ m or less, and a diffuse reflectance of 95. %, And a delustering agent is contained in the outermost layer.
  • Document 6 Japanese Patent Application Laid-Open No. 2007-229630 discloses a white coated steel sheet having a top coating film thickness larger than 20 ⁇ m and a total coating film thickness of 30 ⁇ m or more.
  • the top coat film contains colorless inorganic particles having an average particle diameter of 1 to 10 ⁇ m in addition to the white pigment, thereby eliminating or suppressing the occurrence of cracks in the top coat film. ing.
  • the problem to be solved by the present invention is to provide a coated plate excellent in finish, low gloss, high diffuse reflectance and adhesion.
  • a coated plate having a multilayer coating film comprising two layers of a specific primer layer and a specific top coating film layer on a substrate.
  • the lighting apparatus is a coated plate having a multilayer coating film including two layers of a primer layer and a top coating film layer on the primer layer on a substrate.
  • the primer layer contains a primer resin binder containing a polyester resin and a curing agent, and 80 to 250 parts by mass of a titanium oxide pigment based on 100 parts by mass of the primer resin binder, and the film thickness of the primer layer Is 10 to 20 ⁇ m.
  • the top coat layer comprises a top resin binder containing a polyester resin and a curing agent, and 100 to 250 parts by weight of a titanium oxide pigment and organic polymer fine particles having an average particle size of 4 to 9 ⁇ m with respect to 100 parts by weight of the top coat resin binder. It contains 10 to 30 parts by mass, and the film thickness of the top coat layer is 20 to 35 ⁇ m.
  • the diffuse reflectance at a wavelength of 550 nm on the surface of the multilayer coating film including the two layers is 85% or more.
  • FIG. 1 is a sectional view showing an embodiment according to the present invention.
  • the present embodiment is a coated plate 10 having a multilayer coating film 4 composed of two layers of a specific primer layer 2 and a specific topcoat film layer 3 on a substrate 1,
  • the surface of the multilayer coating film 4 composed of the two layers can obtain a diffuse reflectance of 85% or more at a light wavelength of 550 nm.
  • a lighting fixture for example, LED
  • the light emitted from the light source can be efficiently reflected, so that even a light source with low power consumption can provide sufficient indoor illuminance. Details will be described below.
  • substrate should just be a material conventionally used in order to form a building material, for example, is a metal plate, a wooden board, a glass plate, a plastic board etc.
  • the substrate is preferably a metal plate.
  • the painted plate is a painted metal plate.
  • the metal plate is not particularly limited, but includes an alloy plate such as a steel plate, a stainless steel plate, an aluminum plate, a zinc plate, a copper plate, and an aluminum alloy plate. Further, a plating treatment is performed on these metal plates. Metal plate.
  • plating treatment on steel sheets include hot dip galvanized steel sheets, electrogalvanized steel sheets, alloyed hot dip galvanized steel sheets, aluminum plated steel sheets, zinc alloy plated steel sheets (aluminum-zinc alloy plated steel sheets, aluminum-zinc-silicon). Alloy-plated steel sheets, aluminum-zinc-magnesium alloy-plated steel sheets, aluminum-zinc-magnesium-silicon alloy-plated steel sheets, zinc-magnesium alloy-plated steel sheets), tin-plated steel sheets, lead-plated steel sheets, chrome-plated steel sheets, etc. Can be mentioned. Moreover, what gave the chemical conversion treatment to these metal plates can also be used.
  • chemical conversion treatment As the chemical conversion treatment, generally known chemical conversion treatments such as coating-type chromate treatment, phosphate chromate treatment, electrolytic chromate treatment, zinc phosphate treatment, composite oxide film treatment, and recently developed chromate-free free of hexavalent chromium are included. Processing etc. can be used. Among these metal plates, an aluminum alloy plate or a plated steel plate is preferable in terms of finish and weight reduction.
  • the primer layer contains a primer resin binder containing a polyester resin and a curing agent, and a titanium oxide pigment.
  • the primer layer is formed directly on the surface of the substrate.
  • the polyester resin can be usually produced by an esterification reaction or a transesterification reaction with a polybasic acid component and a polyhydric alcohol component.
  • a polybasic acid component an alicyclic polybasic acid component, an aliphatic polybasic acid component, an aromatic polybasic acid component, etc. can be used, for example.
  • the alicyclic polybasic acid component generally includes a compound having one or more alicyclic structures (mainly 4- to 6-membered rings) and two or more carboxyl groups in one molecule, and an acid anhydride of the compound And an esterified product of the compound.
  • Examples of the alicyclic polybasic acid component include 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid, 3- Alicyclic polycarboxylic acids such as methyl-1,2-cyclohexanedicarboxylic acid, 4-methyl-1,2-cyclohexanedicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 1,3,5-cyclohexanetricarboxylic acid An anhydride of these alicyclic polyvalent carboxylic acids; a lower alkyl esterified product of these alicyclic polyvalent carboxylic acids, and the like.
  • An alicyclic polybasic acid component can be used individually or in combination of 2 or more types.
  • Examples of the alicyclic polybasic acid component include 1,2-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic anhydride, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene- 1,2-dicarboxylic acid and 4-cyclohexene-1,2-dicarboxylic anhydride can be preferably used.
  • 1,2-cyclohexanedicarboxylic acid and 1,2-cyclohexanedicarboxylic acid anhydride can be particularly preferably used from the viewpoint of hydrolysis resistance.
  • the aliphatic polybasic acid component is generally an aliphatic compound having two or more carboxyl groups in one molecule, an acid anhydride of the aliphatic compound, and an esterified product of the aliphatic compound, for example, Aliphatic polycarboxylic acids such as acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, brassic acid, octadecanedioic acid, citric acid; An anhydride of a polyvalent carboxylic acid; a lower alkyl esterified product of these aliphatic polyvalent carboxylic acids.
  • An aliphatic polybasic acid component can be used individually or in combination of 2 or more types.
  • a dicarboxylic acid having an alkylene chain having 4 to 18 carbon atoms examples include adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, brassic acid, and octadecanedioic acid.
  • adipic acid can be preferably used.
  • the aromatic polybasic acid component is generally an aromatic compound having two or more carboxyl groups in one molecule, an acid anhydride of the aromatic compound and a lower alkyl esterified product of the aromatic compound,
  • aromatic polycarboxylic acids such as phthalic acid, isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, 4,4′-biphenyldicarboxylic acid, trimellitic acid, pyromellitic acid; anhydrides of these aromatic polycarboxylic acids And lower alkyl esterified products of these aromatic polycarboxylic acids.
  • An aromatic polybasic acid component can be used individually or in combination of 2 or more types.
  • polyhydric alcohol component a polyhydric alcohol having two or more hydroxyl groups in one molecule can be suitably used.
  • examples of the polyhydric alcohol component (a2) include alicyclic diols, aliphatic diols, aromatic diols and trihydric or higher polyhydric alcohols.
  • the alicyclic diol is generally a compound having one or more alicyclic structures (mainly 4- to 6-membered rings) and two hydroxyl groups in one molecule.
  • Examples of the alicyclic diol include dihydric alcohols such as 1,4-cyclohexanedimethanol, tricyclodecane dimethanol, hydrogenated bisphenol A, and hydrogenated bisphenol F; these dihydric alcohols include ⁇ -caprolactone and the like.
  • Examples include polylactone diol to which a lactone compound is added, and these can be used alone or in combination of two or more.
  • the above aliphatic diol is generally an aliphatic compound having two hydroxyl groups in one molecule.
  • the aliphatic diol include ethylene glycol, propylene glycol, diethylene glycol, trimethylene glycol, tetraethylene glycol, triethylene glycol, dipropylene glycol, 1,4-butanediol, 1,3-butanediol, 2,3 -Butanediol, 1,2-butanediol, 3-methyl-1,2-butanediol, 2-butyl-2-ethyl-1,3-propanediol, 1,2-pentanediol, 1,5-pentanediol 1,4-pentanediol, 2,4-pentanediol, 2,3-dimethyltrimethylene glycol, tetramethylene glycol, 3-methyl-1,5-pentanediol, 2,2,4-trimethyl-1,3 -Pentan
  • the above aromatic diol is generally an aromatic compound having two hydroxyl groups in one molecule.
  • the aromatic diol include ester diol compounds such as bis (hydroxyethyl) terephthalate; alkylene oxide adducts of bisphenol A and the like, and these can be used alone or in combination of two or more.
  • trihydric or higher polyhydric alcohol examples include glycerin, trimethylolethane, trimethylolpropane, diglycerin, triglycerin, 1,2,6-hexanetriol, pentaerythritol, dipentaerythritol, sorbitol, mannitol and the like.
  • Trihydric or higher alcohols Trihydric or higher alcohols; polylactone polyol compounds obtained by adding lactone compounds such as ⁇ -caprolactone to these trihydric or higher alcohols; tris (2-hydroxyethyl) isocyanurate, tris (2-hydroxypropyl) isocyanurate, And tris (hydroxyalkyl) isocyanurate such as tris (2-hydroxybutyl) isocyanurate.
  • trimethylolpropane is particularly preferable.
  • the production of the hydroxyl group-containing polyester resin used in the present embodiment is not particularly limited, and can be performed according to a usual method.
  • an acid component having the polybasic acid component (a1) as an essential component and a polyhydric alcohol component are reacted in a nitrogen stream at 150 to 250 ° C. for 5 to 10 hours to perform an esterification reaction or a transesterification reaction.
  • the acid component and alcohol component may be added at once, or may be added in several portions. Moreover, after synthesize
  • a catalyst may be used to promote the reaction.
  • known catalysts such as dibutyltin oxide, antimony trioxide, zinc acetate, manganese acetate, cobalt acetate, calcium acetate, lead acetate, tetrabutyl titanate, and tetraisopropyl titanate can be used.
  • the hydroxyl group-containing polyester resin can be modified with a fatty acid, an oil or fat, a monoepoxy compound, a monoalcohol compound, a polyisocyanate compound, etc. during the preparation of the resin, or after the esterification reaction or the transesterification reaction.
  • fatty acid examples include coconut oil fatty acid, cottonseed oil fatty acid, hemp seed oil fatty acid, rice bran oil fatty acid, fish oil fatty acid, tall oil fatty acid, soybean oil fatty acid, linseed oil fatty acid, tung oil fatty acid, rapeseed oil fatty acid, castor oil fatty acid, dehydrated castor
  • fatty acids such as oil fatty acids and safflower oil fatty acids; lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, and the like.
  • Examples of the fat include coconut oil, cottonseed oil, hemp seed oil, rice bran oil, fish oil, tall oil, soybean oil, linseed oil, tung oil, rapeseed oil, castor oil, dehydrated castor oil, safflower oil and the like.
  • polyisocyanate compound used for the modification examples include aliphatic diisocyanate compounds such as lysine diisocyanate, hexamethylene diisocyanate, and trimethylhexane diisocyanate; hydrogenated xylylene diisocyanate, isophorone diisocyanate, methylcyclohexane-2,4-diisocyanate, methylcyclohexane.
  • -Aliphatic diisocyanate compounds such as -2,6-diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), 1,3- (isocyanatomethyl) cyclohexane; aromatics such as tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate Diisocyanate compounds; organic polymers such as lysine triisocyanate Reisocyanate itself, or an adduct of each of these organic polyisocyanates and polyhydric alcohol, low molecular weight polyester resin or water, or a cyclized polymer of each of the above organic diisocyanates (for example, isocyanurate), biuret type Additives can be mentioned. These can be used alone or in combination of two or more.
  • extender pigments, color pigments and pigment components such as chromate-based or chromate-free rust preventive pigments, curing catalysts, pigment dispersants, surface conditioners, matting agents, organic solvents
  • a conventionally known material can be contained.
  • the number average molecular weight of the polyester resin is preferably 2,000 to 30,000, particularly in the range of 3,000 to 25,000, from the viewpoint of the finish of the resulting coating film, coating film hardness, and processability. It is preferred to have a molecular weight.
  • the number average molecular weight in this specification is the value which converted the number average molecular weight measured using the gel permeation chromatograph (GPC) on the basis of the molecular weight of a standard polystyrene.
  • HLC8120GPC (trade name, manufactured by Tosoh Corporation) is used as a gel permeation chromatograph
  • TSKgel G-4000HXL “TSKgel G-3000HXL”
  • TSKgel G-2500HXL Using “TSKgel G-2000HXL” (trade name, all manufactured by Tosoh Corporation), measurement can be performed under conditions of mobile phase tetrahydrofuran, measurement temperature of 40 ° C., flow rate of 1 mL / min, and detector RI.
  • the hydroxyl value of the polyester resin is preferably in the range of 10 to 200 mgKOH / g, particularly 60 to 185 mgKOH / g, from the viewpoint of the adhesion of the resulting coating film.
  • the acid value of the polyester resin is 30 mg KOH / g or less, preferably 1 to 20 mg KOH / g from the viewpoint of finish.
  • the curing agent can be used without particular limitation as long as it can be cured by reacting with the hydroxyl group of the polyester resin by heating, and examples thereof include melamine resin, benzoguanamine resin, urea resin, and polyisocyanate compound. be able to.
  • the melamine resin examples include a monohydric alcohol having 1 to 8 carbon atoms, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, in which a part or all of the methylol group of methylolated melamine is used. And partially etherified or fully etherified melamine resins etherified with i-butyl alcohol, 2-ethylbutanol, 2-ethylhexanol and the like.
  • Examples of commercially available melamine resins include Cymel 202, Cymel 232, Cymel 235, Cymel 238, Cymel 254, Cymel 266, Cymel 267, Cymel 272, Cymel 285, Cymel 301, Cymel 303, Cymel 325, Cymel 327, and Cymel 350. , Cymel 370, Cymel 701, Cymel 703, Cymel 1141 (manufactured by Daicel Ornex Co., Ltd.), Uban 20SE60 (manufactured by Mitsui Chemicals, Inc.), and the like.
  • benzoguanamine resin examples include a methylolated benzoguanamine resin obtained by a reaction between benzoguanamine and an aldehyde.
  • aldehyde examples include formaldehyde, paraformaldehyde, acetaldehyde, benzaldehyde and the like.
  • those obtained by etherifying this methylolated benzoguanamine resin with one or more alcohols are also included in the benzoguanamine resin.
  • Examples of the alcohol used for etherification include monohydric alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 2-ethylbutanol, and 2-ethylhexanol. .
  • monohydric alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 2-ethylbutanol, and 2-ethylhexanol.
  • a benzoguanamine resin obtained by etherifying at least a part of the methylol group of the methylolated benzoguanamine resin with a monohydric alcohol having 1 to 4 carbon atoms is preferable.
  • benzoguanamine resin examples include, for example, My Coat 102, My Coat 105, My Coat 106 (all of which are manufactured by Mitsui Chemicals, Inc.), Nicarak SB-201, Nicarac SB-203, Nicarac SB-301, Nicarac SB.
  • the urea resin is obtained by a condensation reaction between urea and formaldehyde, and can be dissolved or dispersed in a solvent or water.
  • polyisocyanate compound examples include compounds having two or more isocyanate groups in one molecule, for example, aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, and naphthalene diisocyanate; tetramethylene diisocyanate, hexamethylene diisocyanate, dimer Aliphatic diisocyanates such as acid diisocyanate and lysine diisocyanate; Alicyclic diisocyanates such as methylene bis (cyclohexyl isocyanate), isophorone diisocyanate, methylcyclohexane diisocyanate, cyclohexane diisocyanate, and cyclopentane diisocyanate; Adducts; Examples include free isocyanate group-containing prepolymers obtained by reacting these polyisocyanates with low molecular weight or high molecular weight polyol compounds (
  • the free isocyanate group of the polyisocyanate compound is a phenol compound, oxime compound, active methylene compound, lactam compound, alcohol compound, mercaptan compound, acid amide compound, imide compound, amine compound, imidazole.
  • a blocked polyisocyanate compound blocked with a blocking agent such as a series compound, a urea series compound, a carbamic acid series compound, or an imine series compound can also be used.
  • a curing catalyst can be blended as necessary to accelerate the curing of the primer resin binder.
  • the curing catalyst when the curing agent is an amino resin include strong acids and neutralized products of strong acids. Typical examples include p-toluenesulfonic acid, dodecylbenzenesulfonic acid, dinonylnaphthalenesulfonic acid, diacid. Examples thereof include sulfonic acid compounds that are strong acids such as nonylnaphthalenedisulfonic acid, and amine neutralized products of these sulfonic acid compounds.
  • a curing catalyst that promotes dissociation of the blocking agent of the blocked polyisocyanate compound that is the curing agent such as tin octylate, dibutyltin di (2-ethyl), etc.
  • organometallic catalysts such as hexanoate), dioctyltin di (2-ethylhexanoate), dibutyltin dilaurate, dibutyltin oxide, dioctyltin oxide, and lead 2-ethylhexanoate.
  • the primer layer contains a titanium oxide pigment.
  • the titanium oxide pigment is not particularly limited in its production method, presence / absence or type of surface treatment, but is preferably as highly concealed and high in whiteness as possible. Among them, a rutile type titanium oxide made by a chlorine method is preferable. What was surface-treated with alumina, silica, titania or the like is preferable.
  • Ti-Pure R706, Ti-Pure R960, Ti-Pure R902 + above, DuPont, trade name, titanium oxide pigment by chlorine method
  • Taipei CR-50, Taipei CR-60, Taipei CR-95 manufactured by Ishihara Sangyo Co., Ltd., trade name, titanium oxide pigment by chlorine method
  • CR-826 trade name, trade name, titanium oxide pigment by chlorine method
  • the content of the titanium oxide pigment is in the range of 80 to 250 parts by mass, preferably 120 to 230 parts by mass, based on 100 parts by mass of the primer resin binder, and is suitable for finishing and high diffuse reflectance. ing. Further, the dry film thickness of the primer layer is in the range of 10 to 20 ⁇ m, preferably 12 to 18 ⁇ m, from the viewpoint of finish and high diffuse reflectance. In addition, the primer layer can be applied in two or more times when it cannot be applied at one time due to the occurrence of cracks.
  • a solvent, a leveling agent, a pigment dispersant, an anti-waxing agent, and the like that are usually used in paints can be used as appropriate in order to improve the coating workability.
  • curtain coating As coating methods, curtain coating, roll coating, dip coating and spray coating are possible. However, when pre-coating is performed by coil coating, the curtain coating method and the roll coating method are recommended because of its economical efficiency. When the roll coating method is applied, the top feed or bottom feed method with three rolls is recommended in order to achieve the best uniformity of the coating surface. So-called natural reverse paint or natural paint) may be used.
  • the curing condition (baking condition) is usually about 15 seconds to 30 minutes at a material maximum temperature (PMT) of 120 to 260 ° C. In the pre-coating field where coating is performed by coil coating or the like, it is usually performed at a material attainable maximum temperature of 160 to 260 ° C. for 15 to 90 seconds.
  • PMT material maximum temperature
  • the top coat layer is a coat layer with less gloss and is preferably a matte coat layer. When such a top coat layer is on the outermost surface of the coated plate, image reflection is reduced.
  • the top coat layer contains a top resin binder containing a polyester resin and a curing agent, a titanium oxide pigment, and organic polymer fine particles having an average particle size of 4 to 9 ⁇ m. The top coat layer is directly formed on the surface of the primer layer.
  • polyester resin the same polyester resin as described in the explanation column of the primer layer can be used.
  • the curing agent to be combined with the polyester resin amino resins and blocked isocyanate compounds similar to those described in the explanation section of the primer layer are preferably used.
  • the hardening catalyst similar to what was described in the description column of the said primer layer can be mix
  • the top coat layer contains a titanium oxide pigment.
  • the same titanium oxide pigment as the primer layer can be used.
  • the content of the titanium oxide pigment in the top coat layer is within the range of 100 to 250 parts by weight, preferably 140 to 190 parts by weight, with respect to 100 parts by weight of the top coat resin binder component. It is suitable from the point of balance of rate and adhesion.
  • the top coat layer in this embodiment contains organic polymer fine particles for the purpose of low gloss and high diffuse reflectance.
  • organic polymer fine particles include urea resin-based organic polymer fine particles and acrylic resin-based organic polymer fine particles obtained by pulverizing a resin obtained by a condensation reaction of urea and an aldehyde component. Further, the organic polymer fine particles may be hollow fine particles.
  • the organic polymer fine particles have an average particle size of 4 to 9 ⁇ m, preferably 5 to 8 ⁇ m. If the average particle diameter is less than 4 ⁇ m, high diffuse reflectance may not be obtained, while if the average particle diameter exceeds 9 ⁇ m, the finish may be impaired.
  • the average particle diameter is a median diameter (d50) value of a volume-based particle size distribution measured by a laser diffraction scattering method using a Microtrac particle size distribution measuring device (trade name “MT3300”, manufactured by Nikkiso Co., Ltd.).
  • organic polymer fine particles examples include Pergo Pack M3 (trade name, manufactured by Lonza Japan), GR-800 (trade name, manufactured by Negami Kogyo Co., Ltd.), Techpolymer MBX-5, Techpolymer MBX-8 (and above). Sekisui Chemical Co., Ltd., trade name) and the like.
  • the organic polymer fine particles blended in the top coat layer is suitable in the range of 10 to 30 parts by weight, preferably 11 to 20 parts by weight with respect to 100 parts by weight of the top coat resin binder.
  • the film thickness of the top coat layer is concealing and needs to be able to be applied uniformly without unevenness, so the range of 20 to 35 ⁇ m, preferably 25 to 33 ⁇ m is suitable.
  • the top coat layer may be coated in two or more times for the purpose of preventing the occurrence of cracks to form the top coat layer.
  • a matting agent such as silica, a solvent, a leveling agent, a surface conditioner, an ultraviolet absorber, a light stabilizer, a pigment dispersant, an anti-waxing agent, which is usually used in paints as necessary.
  • a conventionally known material can be contained.
  • curtain coating, roll coating, dip coating, and spray coating are possible as the coating method to obtain the top coat layer.
  • the curtain coating method and roll coating method are used because of its economic efficiency. Recommended.
  • the roll coating method is applied, the top feed or bottom feed method with three rolls is recommended in order to achieve the best uniformity of the coating surface. So-called natural reverse paint or natural paint) may be used.
  • the curing condition (baking condition) of the top coating is usually performed in the range of 15 to 90 seconds at a maximum material temperature of 160 to 260 ° C. in the pre-coat coating field in which coating is performed by coil coating or the like.
  • the 60 ° specular gloss of the coated plate having a multilayer coating film composed of two layers of the primer layer and the top coating layer obtained as described above is in the range of 5 to 20%, preferably 6 to 15%. However, it is suitable for obtaining highly diffuse reflected light.
  • the coated plate having a multilayer coating film composed of the two layers can obtain a diffuse reflectance of 85% or more, preferably 88% or more at a light wavelength of 550 nm.
  • the diffuse reflection light is light reflected at an angle other than specular reflection (regular reflection), and incident light is reflected in various directions. Specular reflection (regular reflection) light is reflected from one direction. Light that is reflected in one direction.
  • the highly diffuse reflective coated metal plate that is the coated plate of the present embodiment is useful for providing a reflective plate for a lighting fixture such as an LED light.
  • the highly diffuse reflection coated metal plate which is the coated plate of the embodiment is useful for providing various metal building materials (for example, wall materials, ceiling materials, roof materials, etc.).
  • the highly diffuse reflective coated metal plate which is the painted plate of this embodiment is useful for providing a metal skin of a sandwich panel. That is, a sandwich panel is formed by providing a metal skin on both surfaces of a core material such as rock wool, but the metal skin provided on one side of the core material may be formed from the above highly diffuse reflective coating metal plate. The metal skin provided on both surfaces of the core material may be formed from the above highly diffuse reflective coating metal plate. The metal skin formed from the above highly diffuse reflective coating metal plate may form either the indoor or outdoor surface of the building.
  • the interior surface of the room is composed of the above highly diffuse reflective metal sheet
  • the high diffuse reflectance of the highly diffuse reflective metal sheet makes it easier for light to reach every corner of the room, creating dark areas in the room.
  • the building material formed from the above highly diffuse reflective coating metal plate can easily provide a dimmed space in which a person can comfortably act.
  • Example 1 According to the following Step 1 to Step 2, the coated plate (painted metal plate) No. 1 was obtained.
  • Example 15 According to the following steps 1 to 2, the coated plate No. 15 was obtained.
  • Example 21 According to the following steps 1 to 2, the coated plate No. 21 was obtained.
  • the diffuse reflectance at a light wavelength of 550 nm can be 85% or more.
  • the titanium oxide pigment in the primer layer has a certain range of content
  • the film thickness of the primer layer is in a certain range
  • the titanium oxide pigment in the overcoat layer has a specific range of content.
  • it can be obtained by including a certain amount of organic polymer fine particles having an average particle diameter of 4 to 9 ⁇ m and a film thickness of the top coat layer within a certain range.
  • the coating plate (Comparative Examples 1 to 8) in which the blending amount of the organic polymer fine particles in the coating film deviates from the upper limit or the lower limit, and other components not containing the organic polymer fine particles in the coating film Coating plate (Comparative Examples 9 to 13) to be contained, Coating plate (Comparative Examples 14 to 15) in which the film thickness of the top coating film deviates from the lower limit or upper limit, and coating in which the content of titanium white in the upper coating film deviates from the lower limit or upper limit Even if the plate (Comparative Examples 16 to 17) and the material is an AL alloy plate or a stainless steel plate, the coating amount of the organic polymer fine particles is out of the upper limit or lower limit (Comparative Examples 18 to 21), and the primer layer thickness is lower or lower. Although it was a coated plate that deviated from the upper limit (Comparative Examples 22 to 23), none of the painted plates could satisfy all of finish, 60-degree specular gloss, diffuse reflectance, and adh
  • Byron GK-570 manufactured by Toyobo Co., Ltd., polyester resin, number average molecular weight 19,000, hydroxyl value 6 mgKOH / g
  • Cymel 232S Daicel Ornex Co., Ltd., trade name, methyl / butyl mixed etherified melamine resin
  • Taipei CR-95 Ishihara Sangyo Co., Ltd., trade name, titanium white
  • Cyloid 74 Grace Co., Ltd., amorphous silica fine powder
  • Nacure 5225 King Industries, amine salt of dodecylbenzenesulfonic acid
  • Desmodur BL-3175 Sumika Bayer Urethane Co., Ltd.
  • ⁇ indicates that the paint surface is not abnormal or cloudy, such as repellency, dents, or bumps. ⁇ indicates no coating surface abnormality such as repellency, dents, or irregularities, but clouding is observed on the coating surface. In x, an abnormality in the paint surface such as repellency, dents, or irregularities is observed on the paint surface.
  • 60 degree specular gloss When the degree of gloss of the multilayer coating film is 60 degrees according to the 60 degree specular gloss of JIS K 5600-4-7 (1999), respectively. The reflectance was measured and expressed as a percentage when the glossiness of the reference surface of the specular glossiness was taken as 100.
  • Diffuse reflectance Using a CM-3700d manufactured by Minolta Co., Ltd. (using an integrating sphere, diffuse illumination 8 ° direction light reception), the reflectance at a wavelength of 550 nm is expressed as a percentage when the reference white plate is 100. .
  • Adhesion In accordance with JIS K 5600-5-6 (1999) grid pattern-tape method, a knife is used to reach the substrate on the paint film surface of the coated plate vertically at intervals of about 1 mm. 11 cuts are made parallel to each side to form a gobang, and a cellophane (registered trademark) adhesive tape is applied to the surface, and the gobang eye coating surface after the tape is peeled off is evaluated according to the following criteria. did. A: No peeling of the coating film is observed. In the case of ⁇ , slight peeling is observed in a part of the coating film at the corner of the knife scratch. ⁇ is 1 to 20 in which at least all of the 100 gobangs are peeled off. X is 21 or more from which at least all of the 100 gobangs are peeled off.
  • the painted plate (10) is formed on the substrate (1), the substrate (1), the primer layer (2), and the primer layer (2). It is a coating board (10) which has a multilayer coating film (4) provided with two layers of top coat film layer (3).
  • the primer layer (2) contains a primer resin binder containing a polyester resin and a curing agent, and 80 to 250 parts by mass of a titanium oxide pigment based on 100 parts by mass of the primer resin binder.
  • the film thickness of 2) is 10 to 20 ⁇ m.
  • the top coat layer (3) comprises a top resin binder containing a polyester resin and a curing agent, and 100 to 250 parts by weight of a titanium oxide pigment and an organic material having an average particle diameter of 4 to 9 ⁇ m with respect to 100 parts by weight of the top coat resin binder. It contains 10 to 30 parts by mass of polymer fine particles, and the thickness of the top coat layer (3) is 20 to 35 ⁇ m.
  • the diffuse reflectance at a light wavelength of 550 nm on the surface of the multilayer coating film (4) is 85% or more.
  • the coated plate (10) of this embodiment is excellent in finish, low gloss, high diffuse reflectance, and adhesion.
  • the curing agent of the primer resin binder is preferably at least one selected from an amino resin and a blocked polyisocyanate compound.
  • the coated plate (10) of the present embodiment has an effect of being excellent in adhesion.
  • the curing agent of the top resin binder is at least selected from a hydroxyl group-containing polyester resin, an amino resin, and a blocked polyisocyanate compound.
  • a hydroxyl group-containing polyester resin an amino resin, and a blocked polyisocyanate compound.
  • One type is preferable.
  • the coated plate (10) of the present embodiment has an effect that the finish is excellent.
  • the coated plate (10) according to the fourth aspect preferably has a 60-degree specular gloss on the surface of the multilayer coating film (4) of 5 to 20% in the first to third aspects.
  • the coated plate (10) of the present embodiment has an effect of being excellent in diffuse reflectance.
  • the substrate (1) is preferably one type selected from a plated steel plate, a stainless steel plate and an aluminum alloy plate.
  • the coated plate (10) of the present embodiment has an effect of achieving finish and weight reduction.
  • the manufacturing method of the coating plate (10) which concerns on a 6th aspect is based on the primer resin binder containing a polyester resin and a hardening
  • the diffuse reflectance at a light wavelength of 550 nm on the surface of the multilayer coating film (4) having two layers of the primer layer (2) and the top coating film layer (3) is 85% or more.
  • the method for producing the coated plate (10) of the present embodiment has an effect that it is possible to obtain a coated plate (10) excellent in finish, low gloss, high diffuse reflectance, and adhesion.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne la réalisation d'une plaque revêtue (10) au moyen de laquelle une réflectivité de diffusion élevée peut être obtenue, en particulier une plaque revêtue (10) utilisable comme plaque de réflexion de lumière à DEL. La plaque revêtue (10) de l'invention comprend un substrat (1), et un film de revêtement double couche (4) muni de deux couches, à savoir une couche d'apprêt (2) et une couche de film de revêtement supérieure (3) disposée sur la couche d'apprêt (2), ledit film de revêtement double couche étant ménagé sur le substrat (1). Une surface du film de revêtement double couche (4) présente une réflectivité de diffusion égale ou supérieure à 85% par rapport à une longueur d'onde de la lumière de 550 nm.
PCT/JP2016/001232 2016-03-08 2016-03-08 Plaque revêtue et son procédé de fabrication WO2017154036A1 (fr)

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JP2018503843A JP6557775B2 (ja) 2016-03-08 2016-03-08 塗装板及びその製造方法
PCT/JP2016/001232 WO2017154036A1 (fr) 2016-03-08 2016-03-08 Plaque revêtue et son procédé de fabrication

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109504248A (zh) * 2018-10-30 2019-03-22 连云港泽阳装饰材料有限公司 一种幻蓝色烤漆的制作方法
JP2020199757A (ja) * 2019-06-06 2020-12-17 キヤノン株式会社 膜を有する物品、光学機器、塗料、および物品の製造方法
JP2021142672A (ja) * 2020-03-11 2021-09-24 日鉄鋼板株式会社 塗装板

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000007988A (ja) * 1998-06-24 2000-01-11 Kansai Paint Co Ltd 厚膜塗膜形成可能な塗料組成物及びこれを用いた塗装金属板
WO2010064725A1 (fr) * 2008-12-03 2010-06-10 新日本製鐵株式会社 Matériau métallique enrobé et procédé pour sa fabrication
JP2013151608A (ja) * 2012-01-25 2013-08-08 Dainippon Toryo Co Ltd 粉体塗料組成物及びその塗装物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000007988A (ja) * 1998-06-24 2000-01-11 Kansai Paint Co Ltd 厚膜塗膜形成可能な塗料組成物及びこれを用いた塗装金属板
WO2010064725A1 (fr) * 2008-12-03 2010-06-10 新日本製鐵株式会社 Matériau métallique enrobé et procédé pour sa fabrication
JP2013151608A (ja) * 2012-01-25 2013-08-08 Dainippon Toryo Co Ltd 粉体塗料組成物及びその塗装物

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109504248A (zh) * 2018-10-30 2019-03-22 连云港泽阳装饰材料有限公司 一种幻蓝色烤漆的制作方法
JP2020199757A (ja) * 2019-06-06 2020-12-17 キヤノン株式会社 膜を有する物品、光学機器、塗料、および物品の製造方法
JP2021142672A (ja) * 2020-03-11 2021-09-24 日鉄鋼板株式会社 塗装板
JP7453812B2 (ja) 2020-03-11 2024-03-21 日鉄鋼板株式会社 塗装板

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