WO2012002095A1 - 耐久性に優れた耐汚染塗料組成物 - Google Patents
耐久性に優れた耐汚染塗料組成物 Download PDFInfo
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- WO2012002095A1 WO2012002095A1 PCT/JP2011/062626 JP2011062626W WO2012002095A1 WO 2012002095 A1 WO2012002095 A1 WO 2012002095A1 JP 2011062626 W JP2011062626 W JP 2011062626W WO 2012002095 A1 WO2012002095 A1 WO 2012002095A1
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- fatty acid
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- polyester resin
- coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- 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
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/32—Modified amine-aldehyde condensates
Definitions
- the present invention relates to a stain-resistant coating composition that can form a coating film having excellent stain resistance retention over time mainly against rainwater and the like, particularly a stain-resistant coating composition suitable for forming a top coating film on a coated metal plate,
- the present invention relates to a method for forming a coating film excellent in rainwater stain resistance using a stain-resistant coating composition, and a coated metal plate on which a cured coating film is formed from the stain-resistant coating composition.
- outdoor base materials for example, buildings, display objects, guard fences, appliances, machines, etc.
- outdoor paints excellent in weather resistance for the purpose of decoration or protection.
- paints used outdoors include polyurethane resin paints, fluororesin paints, silicone resin-containing paints, acrylic resin-containing paints, polyester-containing paints, and the like, but these paints are exposed outdoors.
- the surface of the coated material is easily soiled by the influence of dust, iron powder, rain (acid rain), sunlight, and the like, and the appearance of the coating film is deteriorated.
- the applicant of the present invention contains an organic solvent-containing coating composition (1) containing a hydroxyl group-containing fluororesin and an amino resin crosslinking agent as a reaction-curable organic resin, or a hydroxyl group-containing fluororesin and / or a hydroxyl group-containing composition.
- a paint comprising an organic solvent-containing paint composition (2) containing an acrylic resin and a (blocked) polyisocyanate compound crosslinking agent as a reaction-curable organic resin, and a tetraalkyl silicate and / or a condensate thereof.
- the top coating composition of Patent Document 1 has insufficient resistance to contamination against rainwater, such as rain streak stains, when used outdoors, and is resistant to rainwater, etc. even in the initial stage of outdoor use. Contamination was not sufficient.
- thermosetting resin composition for a precoated steel sheet excellent in stain resistance, workability and coating film appearance against rain stripe contamination
- A a polyol resin having a hydroxyl number of 5 to 300 and a number average molecular weight of 500 to 20000
- B A thermosetting resin composition comprising an amino resin, (C) an alkoxysilane compound, and (D) a curing catalyst
- the coating film obtained from this thermosetting resin composition has good anti-fouling property against long-term rain-stain contamination over time.
- a coating film having a gloss less than semi-gloss 60 ° gloss is about 50 or less
- the present invention relates to a stain-resistant paint composition capable of forming a coating film excellent in stain resistance and corrosion resistance retention against rainwater and the like, and in particular, a stain-resistant paint suitable for forming a top coat film of a glossy coated metal plate having a semi-gloss or less. It is to provide a composition.
- a coating composition containing a specific organosilicate and / or its condensate component in the binder is particularly resistant to rainwater and the like in a coating film having a gloss less than semi-gloss (60 ° gloss is about 50 or less).
- the present inventors have found that a coating film excellent in retainability can be formed, and have completed the present invention.
- the present invention includes the following inventions: Item 1, (A) Polyester resin containing 50 to 100% by mass of a solid content of fatty acid-modified polyester resin (A1) having a number average molecular weight of 5000 to 30000, a hydroxyl value of 5 to 100 mgKOH / g, and an oil length of 3 to 30% There,
- the fatty acid-modified polyester resin (A1) (A1): a polybasic acid containing an alicyclic polybasic acid (a1-1), (A2): an alcohol containing a trihydric or higher polyhydric alcohol (a2-1), and (a3): obtained by reaction of a fatty acid,
- the content of the alicyclic polybasic acid (a1-1) in the polybasic acid (a1) is within the range of 50 to 100 mol% based on the total amount of the polybasic acid (a1), and the alcohol ( a polyester resin in which the content of the trihydric or higher polyhydric alcohol (a2-1) in a2) is in the
- Item 2 In the reaction for obtaining the fatty acid-modified polyester resin (A1), the total content of the alicyclic polybasic acid (a1-1) in the polybasic acid component (a1) is the total amount of the polybasic acid component (a1).
- Item 2 The antifouling paint composition according to Item 1, which is in the range of 85 to 100 mol% based on Item 3.
- the polyester resin component (A) is 50 to 90% by mass, and the melamine resin component (B) is solid.
- Item 3 The antifouling coating composition according to Item 1 or 2, wherein the content is 10 to 50% by mass.
- the alicyclic polybasic acid (a1-1) is 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid 3-methyl-1,2-cyclohexanedicarboxylic acid, 4-methyl-1,2-cyclohexanedicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid and 1,3,5-cyclohexanetricarboxylic acid Any one of Items 1 to 3, which is at least one selected from the group consisting of a carboxylic acid, an anhydride of the alicyclic polyvalent carboxylic acid, and a lower alkyl ester of the alicyclic polyvalent carboxylic acid.
- a trihydric or higher polyhydric alcohol (a2-1) is glycerin, trimethylolethane, trimethylolpropane, diglycerin, triglycerin, 1,2,6-hexanetriol, pentaerythritol, dipentaerythritol, sorbitol And a mannitol trihydric or higher alcohol; a polylactone polyol compound obtained by adding a lactone compound to the trihydric or higher alcohol; and at least one selected from the group consisting of tris (hydroxyalkyl) isocyanurate 5.
- the antifouling paint composition according to any one of 1 to 4.
- fatty acid (a3) is 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, linseed oil fatty acid, tung oil fatty acid, rapeseed oil fatty acid, castor oil fatty acid, Monovalent carboxylic acid of at least one linear hydrocarbon selected from the group consisting of dehydrated castor oil fatty acid, safflower oil fatty acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid Item 6.
- the antifouling paint composition according to any one of Items 1 to 5, which is an acid.
- Item 7 The antifouling paint composition according to any one of Items 1 to 6, further comprising a matting agent (D).
- Item 8. The antifouling paint according to Item 7, containing the matting agent (D) in a solid content of 0.1 to 30% by mass with respect to the total solid content of the polyester resin (A) and the melamine resin (B). Composition.
- Item 9. A step of forming a primer coating with a chromium-free primer coating on one or both surfaces of a metal plate, and at least one of the formed primer coatings, any one of Items 1-8
- a method of forming a coating film comprising the step of forming a top coating film with the antifouling paint composition described in 1.
- a step of forming a primer coating with a chromium-free primer coating on one or both surfaces of a metal plate, and at least one of the formed primer coatings, any one of Items 1-8 A method for producing a coated metal sheet, comprising a step of forming a top coat film with the antifouling paint composition described in 1. Item 11. A coated metal sheet obtained by the method according to Item 11, Item 9 or 10.
- the antifouling paint composition of the present invention comprises a resin binder containing a polyester resin component containing a specific fatty acid-modified polyester resin and a melamine resin component containing a butyl etherified melamine resin, a specific organosilicate and / or condensation thereof.
- a coating composition containing physical components, and this coating composition has excellent anti-contamination property against rainwater and the like particularly in a coating film having a gloss less than semi-gloss (60 ° gloss is about 50 or less).
- a coating film can be formed.
- the specific fatty acid-modified polyester resin that is an essential component has 50 mol% or more of the polybasic acid component having an alicyclic polybasic acid, and thus has excellent weather resistance and hydrolysis resistance.
- the modified part is usually involved in the adsorption of the pigment component used in the antifouling paint composition.
- the coating film with the stain resistant coating composition of the present invention can form a coating film having excellent anti-staining property against rainwater etc., particularly when the coating film is semi-glossy or glossy. Although it is not clear, I think as follows.
- the fatty acid-modified polyester resin which is a base resin of the stain-resistant coating composition of the present invention and uses a large amount of an alicyclic polybasic acid as a polybasic acid component, has good weather resistance and hydrolysis resistance, and is further a pigment. Since it also has an adsorbing part (fatty acid-modified part) with the component, it is considered to be advantageous for suppressing deterioration of the pigment component.
- a glossy film that is less than semi-glossy with a matting agent, etc. has a more uneven surface shape, better water wetting, and is exposed to more severe conditions regarding hydrolysis resistance. Therefore, when the conventional polyester paint system is used, the deterioration of the painted surface (choking, etc.) is accelerated, and the appearance is not good.
- the coating film obtained by the stain-resistant coating composition of the present invention has excellent hydrolysis resistance and suppresses deterioration of the pigment component, so that it has superior appearance and stain resistance compared to conventional polyester coating systems. It is considered that the retentivity can be exhibited.
- the antifouling paint composition of the present invention comprises the following polyester resin component (A), melamine resin component (B), and organosilicate and / or its condensate component (C). It is.
- the polyester resin component (A) comprises the following fatty acid-modified polyester resin (A1) in a solid content of 50 to 50% based on the total solid content of the polyester resin component (A). Contains 100% by mass.
- the fatty acid-modified polyester resin (A1) which is an essential component of the polyester resin component (A), is obtained by the reaction of the following polybasic acid component (a1), alcohol component (a2) and fatty acid (a3). It is done.
- the polybasic acid component (a1) contains an alicyclic polybasic acid (a1-1), and the polybasic acid component (a1)
- the total content of the alicyclic polybasic acid (a1-1) is within a range of 50 to 100 mol% based on the total amount of the polybasic acid component (a1).
- the total content of the alicyclic polybasic acid (a1-1) is preferably in the range of 70 to 100 mol%, more preferably 85 to 100 mol%.
- the alicyclic polybasic acid (a1-1) is generally a compound having one or more alicyclic structures (for example, 4 to 6 membered ring) and two or more carboxyl groups in one molecule, the compound Acid anhydrides, esterified products thereof, such as 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid , 3-methyl-1,2-cyclohexanedicarboxylic acid, 4-methyl-1,2-cyclohexanedicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 1,3,5-cyclohexanetricarboxylic acid, etc.
- 1,2-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic anhydride, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid, 4- Cyclohexene-1,2-dicarboxylic anhydride can be preferably used.
- 1,2-cyclohexanedicarboxylic acid and 1,2-cyclohexanedicarboxylic acid anhydride are particularly preferred from the viewpoint of hydrolysis resistance.
- the alicyclic polybasic acid (a1-1) can be used alone or in combination of two or more.
- the polybasic acid component includes an alicyclic polybasic acid (a1-1), an aromatic polybasic acid (a1-2), and an aliphatic polybasic acid. (A1-3) can be included.
- the aromatic polybasic acid (a1-2) is generally an aromatic compound having two or more carboxyl groups in one molecule, an acid anhydride of the aromatic compound, and an esterified product of the aromatic compound.
- aromatic polyvalent carboxylic acids such as phthalic acid, isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, 4,4′-biphenyldicarboxylic acid, trimellitic acid, pyromellitic acid; anhydrides of the aromatic polyvalent carboxylic acid
- a lower alkyl esterified product of the aromatic polycarboxylic acid herein, the lower alkyl refers to an alkyl having about 1 to 5 carbon atoms, for example).
- the aromatic polybasic acid (a1-2) can be used alone or in combination of two or more.
- the aliphatic polybasic acid (a1-3) 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.
- succinic acid glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, brassylic acid, octadecanedioic acid, citric acid, etc.
- a polyvalent carboxylic acid; an anhydride of the aliphatic polyvalent carboxylic acid; a lower alkyl esterified product of the aliphatic polyvalent carboxylic acid (herein, the lower alkyl refers to, for example, an alkyl having about 1 to 5 carbon atoms), etc. Is mentioned.
- the above aliphatic polybasic acids can be used alone or in combination of two or more.
- a dicarboxylic acid having an alkyl 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 alcohol component (a2) contains a trihydric or higher polyhydric alcohol (a2-1), and the trivalent in the alcohol component (a2).
- the total content of the polyhydric alcohol (a2-1) is in the range of 10 to 70 mol% based on the total amount of the alcohol component (a2).
- the total content of the trihydric or higher polyhydric alcohol (a2-1) is preferably in the range of 20 to 65 mol%, more preferably 30 to 60 mol%.
- Examples of the trihydric or higher polyhydric alcohol (a2-1) include glycerin, trimethylolethane, trimethylolpropane, diglycerin, triglycerin, 1,2,6-hexanetriol, pentaerythritol, dipentaerythritol, Trihydric or higher alcohols such as sorbitol and mannitol; polylactone polyol compounds obtained by adding lactone compounds such as ⁇ -caprolactone to trihydric or higher alcohols; tris (2-hydroxyethyl) isocyanurate, tris (2- And tris (hydroxyalkyl) isocyanurate such as hydroxypropyl) isocyanurate and tris (2-hydroxybutyl) isocyanurate.
- trimethylolpropane is particularly preferred from the viewpoint of increasing the molecular weight of the fatty acid-modified polyester resin (A1) and improving the reactivity of the modification reaction with the fatty acid (a3).
- the alcohol (a2) component includes a trihydric or higher polyhydric alcohol (a2-1), a dihydric alcohol (a2-2), and a monoalcohol (a2- 3) can be used.
- dihydric alcohol (a2-2) examples include ethylene glycol, propylene glycol, diethylene glycol, trimethylene glycol, tetraethylene glycol, triethylene glycol, dipropylene glycol, 1,4-butanediol, and 1,3-butanediol.
- Examples of the monoalcohol (a2-3) include monoalcohols such as methanol, ethanol, propyl alcohol, butyl alcohol, stearyl alcohol and 2-phenoxyethanol; glycidyl esters of propylene oxide, butylene oxide and synthetic highly branched saturated fatty acids (trade names) Examples thereof include alcohol compounds obtained by reacting monoepoxy compounds such as “Cardura E10” and HEXION Specialty Chemicals) with an acid.
- the fatty acid (a3) is a monovalent carboxylic acid of a linear hydrocarbon, such as coconut oil fatty acid, cottonseed oil fatty acid, hemp oil fatty acid, rice bran Fatty acids such as 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 oil fatty acid, safflower oil fatty acid; lauric acid, myristic acid, palmitic acid , Stearic acid, oleic acid, linoleic acid, linolenic acid and the like.
- the said fatty acid can be used individually or in combination of 2 or more types.
- the iodine value is a numerical value serving as an index representing the degree of unsaturation of the compound, and is represented by the number of g of iodine absorbed by 100 g of the sample.
- the measurement can be performed according to the standard of JIS K 5421.
- coconut oil fatty acid lauric acid, myristic acid, palmitic acid, stearic acid, especially coconut oil fatty acid can be suitably used as the fatty acid (a3).
- the production of the fatty acid-modified polyester resin (A1) is not particularly limited, and can be performed according to a usual method.
- the polybasic acid component (a1), the alcohol component (a2), and the fatty acid (a3) 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.
- a method is mentioned.
- the modification with the fatty acid (a3) is performed simultaneously with the esterification reaction or transesterification reaction of the polybasic acid component (a1) and the alcohol component (a2), or after the esterification reaction or after the transesterification reaction. Can do.
- the polybasic acid component (a1), alcohol component (a2), and fatty acid (a3) may be added at once or 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 fatty acid-modified polyester resin (A1) can be modified with a monoepoxy compound during preparation or after preparation of the resin.
- a monoepoxy compound for example, a glycidyl ester of a synthetic highly branched saturated fatty acid (trade name “Cardura E10”, manufactured by HEXION Specialty Chemicals) can be suitably used.
- the fatty acid-modified polyester resin (A1) has a number average molecular weight in the range of 5000 to 30000, preferably 7000 to 25000, more preferably 10,000 to 20000, from the viewpoint of processability and smoothness of the resulting coating film. Is preferred.
- the fatty acid-modified polyester resin (A1) generally has a hydroxyl value in the range of 5 to 100 mgKOH / g, preferably 10 to 90 mgKOH / g, more preferably, from the viewpoint of curability of the resulting coating film. Preferably has a hydroxyl value in the range of 40 to 80 mg KOH / g.
- the fatty acid-modified polyester resin (A1) has an oil length in the range of 3 to 30%, preferably in the range of 5 to 20%, from the viewpoint of the weather resistance of the resulting coating film. It is preferable to have Here, the oil length is mass% of the fatty acid component (a3) with respect to the total amount of the polybasic acid component (a1), the alcohol component (a2) and the fatty acid component (a3) which are constituent components.
- the fatty acid-modified polyester resin (A1) preferably has a glass transition temperature in the range of 0 to 50 ° C., preferably 10 to 40 ° C., from the viewpoint of the hardness and workability of the resulting coating film. .
- the adjustment of the number average molecular weight and the hydroxyl value of the fatty acid-modified polyester resin (A1) is, for example, equivalent of the carboxyl group in the polybasic acid component (a1) and the fatty acid component (a3) and the hydroxyl group in the alcohol component (a2).
- the ratio (COOH / OH) can be adjusted, or the reaction time in the esterification reaction or transesterification reaction can be adjusted.
- the equivalent ratio (COOH / OH) of the carboxyl group in the polybasic acid component (a1) to the hydroxyl group in the alcohol component (a2) is generally 0.5 to 0.98, preferably 0.6 to It is preferable to be within the range of 0.95.
- the number average molecular weight and the weight average molecular weight in this specification are based on the number average molecular weight and the weight average molecular weight measured by gel permeation chromatograph (manufactured by Tosoh Corporation, “HLC8120GPC”) based on the molecular weight of standard polystyrene. This is the converted value.
- the columns are “TSK-gel G4000H XL ”, “TSK-gel G3000H XL ”, “TSK-gel G2500H XL ”, “TSK-gel G2000H XL ” (all trade names, manufactured by Tosoh Corporation).
- the measurement conditions of mobile phase tetrahydrofuran, measurement temperature 40 ° C., flow rate 1 mL / min, detector RI were used.
- the glass transition temperature (Tg) is based on differential thermal analysis (DSC).
- polyester resin component (A) in addition to the fatty acid-modified polyester resin (A1), a normal oil-free polyester resin (A2) that is not modified with a normal fatty acid can be included.
- the oil-free polyester resin (A2) is a polyester resin obtained by an esterification reaction or a transesterification reaction of the polybasic acid component (a1) and the alcohol component (a2) by a conventional method, and the polybasic acid component (a1) and As an alcohol component (a2), it can manufacture in the same way as the method illustrated by the said fatty acid modified polyester resin (A1), using what was illustrated by the said fatty acid modified polyester resin (A1).
- the solid content of the fatty acid-modified polyester resin (A1) is 50 to 100% by mass with respect to the total solid content of the polyester resin component (A).
- it is preferably in the range of 60 to 100% by mass, more preferably 70 to 100% by mass.
- the melamine resin component (B) contains the following butyl etherified melamine resin (B1) in a solid content of 50 to 100% by mass relative to the total solid content of the melamine resin component (B). .
- butyletherified melamine resin is a methylolated melamine resin that is an addition reaction product (either a monomer or a multimer) of melamine and an aldehyde component such as formaldehyde or paraformaldehyde. It is a melamine resin obtained by etherifying a part or all of the methylol groups therein with n-butyl alcohol or isobutyl alcohol.
- the butyl etherified melamine resin includes a melamine resin obtained by etherifying some or all of the methylol groups in the methylolated melamine resin with n-butyl alcohol, a melamine resin etherified with isobutyl alcohol, n-butyl alcohol and Any melamine resin etherified with isobutyl alcohol is included.
- the number average molecular weight of the butyl etherified melamine resin is preferably in the range of 800 to 8000, and more preferably in the range of 1000 to 5000, from the viewpoint of the processability and stain resistance of the resulting coating film.
- the butyl etherified melamine resin (B1) can be used alone or as a mixture of two or more.
- butyl etherified melamine resin (B1) examples include, for example, Uban 20SE, Uban 225 (all of which are manufactured by Mitsui Chemicals, Inc.), Super Becamine J820-60, Super Becamine L-117-60, Super Examples include Becamine L-109-65, Super Becamine 47-508-60, Super Becamine L-118-60, Super Becamine G821-60 (all of which are manufactured by DIC Corporation).
- melamine resin component (B) As the melamine resin component (B), a melamine resin (melamine resin (B2)) other than the butyl etherified melamine resin (B1) can be included.
- a methylol group in a methylolated melamine resin which is an addition reaction product of melamine and an aldehyde component such as formaldehyde or paraformaldehyde (which may be either a monomer or a multimer).
- Melamine resin partly or entirely etherified with one or more alcohols other than n-butyl alcohol and isobutyl alcohol, n-butyl alcohol and / or isobutyl alcohol, and other than n-butyl alcohol and isobutyl alcohol Mention may be made of melamine resins etherified with one or more alcohols.
- alcohols other than n-butyl alcohol and isobutyl alcohol used for etherification include monohydric alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, 2-ethylbutanol and 2-ethylhexanol.
- Specific examples of the melamine resin (B2) include melamine resin etherified with methyl alcohol (methyl etherified melamine resin), melamine resin etherified with methyl alcohol and butyl alcohol (methyl / butyl mixed etherified melamine resin), and the like. It is done.
- Examples of the melamine resin etherified with methyl alcohol include Sumimar M-100, Sumimar M-40S, Sumimar M-55 (all trade names, manufactured by Sumitomo Chemical Co., Ltd.), Cymel 300, Cymel 303, Cymel 325, Cymel 327, Cymel 350, Cymel 370, Cymel 730, Cymel 736, Cymel 738 (all are trade names manufactured by Nippon Cytec Industries, Inc.), Mellan 522, Mellan 523 (all are Hitachi Chemical Industries, Ltd.) Co., Ltd., trade name), Nicarak MS17, Nicarak MS15, Nicarak MS001, Nicarak MX430, Nicarak MX650 (all trade names, manufactured by Sanwa Chemical Co., Ltd.), Resimin 740, Resimin 741, Resimin 747 (all above, all Monsan Company Ltd., methyl etherified melamine resins trade name).
- Examples of melamine resins etherified with methyl alcohol and butyl alcohol include Cymel 232, Cymel 235, Cymel 202, Cymel 238, Cymel 254, Cymel 266, Cymel 272, Cymel 1130, Cymel XV-514, Cymel XV805 (all Methyl / butyl mixed etherification such as Nippon Cytec Industries Co., Ltd. (trade name), Sumimar M66B (Sumitomo Chemical Co., Ltd., trade name), Resimin 753, Resimin 755 (all of which are manufactured by Monsanto) Mention may be made of melamine resins.
- the solid content of the butyl etherified melamine resin (B1) is 50 to 100% by mass with respect to the total solid content of the melamine resin component (B).
- it is preferably in the range of 70 to 100% by mass, more preferably 80 to 100% by mass.
- the butyl etherified melamine resin (B1) has a lower polarity than the methyl etherified melamine resin, methyl / butyl mixed etherified melamine resin and the like, and has good compatibility with the polyester resin (A) as the base resin. Therefore, the coating film obtained from the antifouling paint composition containing the butyl etherified melamine resin (B1) has excellent uniformity of crosslinking.
- the butyl etherified melamine resin (B1) is less likely to be localized on the surface layer in the coating film than the methyl etherified melamine resin and the methyl / butyl mixed etherified melamine resin. Therefore, the coating film obtained from the stain-resistant coating composition containing the butyl etherified melamine resin (B1) has excellent weather resistance.
- a curing catalyst can be used as necessary.
- a sulfonic acid compound or a neutralized product of a sulfonic acid compound can be generally used.
- Examples of the sulfonic acid compound include p-toluenesulfonic acid, dodecylbenzenesulfonic acid, dinonylnaphthalenesulfonic acid, dinonylnaphthalenedisulfonic acid, and the like.
- Examples of the neutralizing agent in the neutralized product of the sulfonic acid compound include basic compounds such as primary amine, secondary amine, tertiary amine, ammonia, caustic soda, and caustic potash.
- the solid content ratio of the polyester resin component (A) and the melamine resin component (B) is based on the total solid content of the polyester resin component (A) and the melamine resin component (B).
- the polyester resin component (A) is 50 to 90% by mass and the melamine resin component (B) is 10 to 50% by mass.
- the resulting coating film has curability, stain resistance, mechanical strength, and workability. From the viewpoints of solvent resistance, corrosion resistance, weather resistance and the like.
- (C) Organosilicate and / or its condensate component (C) component of the present invention, General formula: (R 1 ) n —Si— (OR 2 ) 4-n [Wherein, R 1 is an alkyl group having 1 to 18 carbon atoms or a phenyl group which may be substituted with an epoxy group or a mercapto group, R 2 is an alkyl group having 1 to 6 carbon atoms, and n is 0 or 1. ] It is the organosilicate represented by these, and / or its condensate.
- Component (C) contained in the coating composition of the present invention is used for the coating film to exhibit a hydrophilic effect on the surface of the substrate efficiently after coating. From the viewpoint of this effect, the above organosilicate is used. The condensate is more preferred.
- R 1 in the above general formula examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, pentyl, hexyl, heptyl, n-octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, Examples include tetradecyl, hexadecyl, octadecyl, glycidyl, methylglycidyl (2-methylglycidyl), mercaptomethyl, 2-mercaptoethyl, 2-mercaptopropyl, 3-mercaptopropyl, 4-mercaptobutyl, phenyl, p-mercaptophenyl groups, etc. be able to.
- organosilicate of component (C) include tetrafunctional silanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, tetrabutoxysilane, tetraisobutoxysilane; methyltrimethoxysilane, methyl Triethoxysilane, methyltripropoxysilane, methyltriisopropoxysilane, methyltri-n-butoxysilane, methyltriisobutoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltripropoxysilane, phenyltriisopropoxysilane, phenyltri n-butoxysilane, phenyltriisobutoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane,
- the organosilicate condensate can be produced by a conventional method.
- examples of commercially available products include MKC silicate MS51, MS56, MS57, MS56S, MS56SB5, MS58B15, MS58B30, ES40, EMS31, BTS (all of which are Mitsubishi Chemical Co., Ltd., trade name), Methyl silicate 51, Ethyl silicate 40, Ethyl silicate 40T, Ethyl silicate 48 (all are trade names, produced by Colcoat Co., Ltd.), KR500, KR9218, X-41-1805, X-41-1810, X-41-1818, X-41-1053, X-41-1056 (all are trade names manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.
- organosilicate condensates can be obtained by single hydrolysis or by partial hydrolysis condensation using a combination of two or more.
- the organosilicate condensate is a branched or linear condensate, and the degree of condensation is preferably 2 to 100, preferably 2 to 20.
- the (C) component organosilicate or organosilicate condensate may be used alone or in combination of two or more.
- the organosilicate represented by the above general formula and / or its condensate it has a methoxy group and an alkoxy group having 2 to 6 carbon atoms as an OR 2 group, and a methoxy group / an alkoxy group having 2 to 6 carbon atoms; It is preferable that the ratio of the number is in the range of 95/5 to 30/70 from the viewpoint of pot life after the preparation of the paint.
- the solid content of the component (C) is 0.1 to 50% by mass, preferably 0, based on the total solid content of the components (A) and (B). 0.5 to 30% by mass, more preferably 1 to 20% by mass.
- the amount of the component (C) is within the above range, the effect of containing the component (C) is more exhibited, and the initial stain resistance of the resulting coating film, the retention of stain resistance, and the coating obtained It is also suitable from the viewpoint of mechanical strength and durability of the film.
- hydrolysis accelerators such as acidic surfactants and boric acid compounds, colored pigments, silica fine particles, etc.
- Extender pigments organic resin powders, inorganic aggregates, pigment dispersants, UV absorbers, UV stabilizers, antifoaming agents, surface conditioners and other paint additives, solvents and other known materials conventionally used in paints Can also be included.
- the above acidic surfactant and boric acid compound have an action of promoting the hydrolysis of the organosilicate and / or the condensate component (C) thereof.
- Hydrolysis accelerators such as surfactants and boric acid compounds that exhibit acidity can be used from the viewpoint of improving stain resistance, although the pot life of the coating composition of the present invention is shortened when used in combination.
- surfactant exhibiting acidity examples include phosphate ester salts such as polyoxyethylene phosphate ester and alkyl phosphate ester salt; for example, alkyl or alkylbenzene sulfonate salts such as sodium lauryl sulfonate and sodium dodecylbenzene sulfonate, Alkyl naphthalene sulfonates such as sodium isopropyl naphthalene sulfonate, sulfonates such as alkyl diphenyl ether sulfonate; sulfate esters such as alkyl or alkyl benzene sulfate, (poly) oxyethylene alkyl phenyl ether sulfate; eg alkyl sulfosuccinic acid
- a surfactant such as a carboxylate such as a salt may be used.
- boric acid compound examples include trialkyl borate such as trimethyl borate, triethyl borate, tributyl borate; boric acid and the like.
- the solid content of these hydrolysis accelerators is 30% by mass or less, particularly 0.5 to 20% by mass, more particularly 1 to 4% by mass with respect to the total solid content of the components (A) and (B). It is preferable that it is 10 mass%.
- the extender pigment examples include silica fine particles, talc, mica powder, and barita.
- the solid content of the extender pigment is 0.1 to 20% by mass, particularly 0.5 to 15% by mass, more particularly 1 to 10% by mass, based on the total solid content of the components (A) and (B). It is preferable that
- the coating composition of the present invention may contain a matting agent (D) for the purpose of adjusting the gloss so that the obtained coating film has a finished appearance such as matte or semi-gloss.
- the matting agent (D) is used to reduce the gloss of the resulting coating film, and may be either an organic matting agent or an inorganic matting agent. Moreover, these can be used individually or in combination of 2 or more types.
- the stain resistant paint composition of the present invention can form a paint film having excellent finish of stain resistance and corrosion resistance, in particular, in a paint film having a finished appearance with reduced gloss such as matte and semi-gloss. .
- Examples of the organic matting agent include organic resin fine particles that are not completely melted by baking at the time of forming the coating film.
- the organic resin fine particles usually have an average particle diameter in the range of 3 to 80 ⁇ m, preferably 5 to 60 ⁇ m, from the viewpoint of coating film appearance, coating workability, and the like.
- Examples of organic matting agents include fluorine resins such as polyvinylidene fluoride and polytetrafluoroethylene, polyamides, acrylic resins, polyurethanes, phenol resins, silicone resins, polypropylene, and polyamides such as nylon 11 and nylon 12. be able to.
- inorganic matting agents examples include silica, mica, alumina, talc, clay, calcium carbonate, barium sulfate and the like.
- the matting agent (D) can be used alone or in combination of two or more.
- the solid content of the matting agent (D) is preferably from 0.1 to 30% by mass, particularly preferably from 0.5 to 20% by mass, based on the total solid content of the components (A) and (B). .
- the antifouling paint composition of the present invention can be produced by uniformly mixing the above components (A) to (C) and, if necessary, the above other components.
- the pigment component is prepared by previously mixing and dispersing a part of the resin component (A) and / or a pigment dispersant to prepare a pigment paste, and mixing the pigment paste with the remaining components. it can.
- the coating composition of the present invention may be a one-pack type paint, but the two-component mixture is prepared immediately before use by separating the organosilicate and / or its condensate as component (C) from other components. It can also be a mold paint. From the viewpoint of storability and the like, a two-component paint is preferred.
- the coating composition is adjusted to a desired viscosity by adding an organic solvent or the like as necessary, and then air spray, electrostatic air Using a spray, roll coater, flow coater, dipping coater, brush, bar coater, applicator, etc., the coating film thickness after drying is usually 0.5-300 ⁇ m, preferably 5-50 ⁇ m In general, a method of heating and curing at a temperature of 80 to 300 ° C. for about 5 seconds to 1 hour may be used. As the coating method, spray coating or roll coater coating is preferable among the above methods.
- the coating film forming method of the present invention comprises forming a primer coating film with a chromium-free primer coating which does not contain a chromium-containing rust-preventing component on one or both surfaces of a metal plate. It is a coating film forming method characterized by forming a top coating film with the antifouling coating composition of the present invention on at least one of the films.
- the method for forming a coating film according to the present invention includes a step of forming a primer coating film on one or both surfaces of a metal plate with a primer coating using a chromium-free primer coating, and at least one of the formed primer coating films. Furthermore, it is a coating film forming method characterized by including the process of forming a top coat film with the said contamination
- the present invention also provides a method for producing a coated metal plate including the steps of the method for forming a coating film and a coated metal plate obtained by the method for forming a coating film or the method for producing a coated metal plate.
- the coating film forming method of the present invention can be used for both pre-coating and post-coating.
- Preferable examples of use include coating on the above-mentioned outdoor base materials (for example, buildings, display objects, guard fences, appliances, machines, etc.).
- Examples of the metal plate to be coated in the coating film forming method of the present invention include cold rolled steel plate, hot dip galvanized steel plate, electrogalvanized steel plate, alloy galvanized steel plate (iron-zinc, aluminum-zinc, nickel-zinc, etc. Alloy galvanized steel plate), aluminum plate, stainless steel plate, copper plate, copper plated steel plate, tin plated steel plate and the like.
- the primer When painting on metals, the primer can be applied as it is if the metal surface, which is the material to be coated, is not contaminated with oil or other contaminants, but in order to improve the adhesion and corrosion resistance with the coating film. It is desirable to apply a known metal surface treatment. These known surface treatment methods include phosphate surface treatment, chromate surface treatment, zirconium surface treatment and the like.
- a chromium-free primer coating characterized by not containing a chromium-containing rust preventive component is used from the viewpoint of environmental protection. If the said primer is a chromium free primer coating, the well-known primer used in the coloring color steel plate coating field
- Chromium-free primer paint is selected as appropriate according to the type of material to be coated and the type of metal surface treatment.
- epoxy-based and polyester-based primer coatings and their modified primer coatings are suitable, and polyester-based primer coatings are suitable when workability is particularly required.
- the primer coating film As a specific means for forming the primer coating film, there is exemplified a means for applying a primer paint and then heating and curing as necessary.
- the primer coating is applied by a known coating method such as roll coating or spray coating so that the primer coating thickness is 1 to 30 ⁇ m, preferably 2 to 20 ⁇ m.
- the atmospheric temperature is 80 to 300 ° C.
- the layer structure of the primer coating is not particularly limited.
- the primer coating may be a single layer or a second primer coating (intermediate coating) formed on the first primer coating. It may be a layer.
- the primer film has two layers, the first primer film has an anticorrosion function, and the second primer film (intermediate film) has processability and chipping resistance.
- the primer coating can also have different functions.
- a top coating film is formed from at least one of the primer coating films formed on one side or both sides of the metal plate by the stain resistant coating composition of the present invention.
- the top coat film is formed so as to overlap on at least one side of the formed primer coat film.
- “on at least one of the primer coatings” refers to the top of the primer coating formed on one side when the primer coating is formed on one side of the metal plate, When a primer coating is formed on both sides of the upper surface, it is formed on or on the primer coating formed on one side of the metal plate among the primer coatings formed on both sides. It points on the applied primer coating.
- a means for coating the antifouling paint composition of the present invention and then heating and curing as necessary is exemplified.
- the coating method include curtain coating, roll coater coating, dip coating, and spray coating.
- the film thickness is usually applied so that the coating thickness after drying is in the range of 5 to 50 ⁇ m, preferably 8 to 25 ⁇ m.
- the coating method is not limited, but curtain coating and roll coater coating are preferred from the economical viewpoint of pre-coated steel sheet coating.
- a bottom feed method (so-called natural reverse coating or natural coating) using two rolls is preferable from the viewpoint of practicality.
- a top feed or bottom feed method using three rolls can be performed from the viewpoint of achieving the best uniformity of the coating surface.
- the curing condition of the top coating film by the coating composition of the present invention is usually about 15 seconds to 30 minutes at the maximum material reaching temperature of 120 to 260 ° C. In the field of pre-coating, which is applied by coil coating or the like, it is usually performed at a material reaching maximum temperature of 160 to 260 ° C. for a baking time of 15 to 90 seconds.
- Production and production example 1 of polyester resin The following raw materials were charged into a flask equipped with a thermometer, stirrer, heating device and rectification tower: 1,2-cyclohexanedicarboxylic anhydride 150.9 parts (0.98 mol) Neopentyl glycol 38.9 parts (0.37 mol) 9.6 parts (0.06 mol) of butylethylpropanediol 77.8 parts (0.57 mol) of trimethylolpropane Coconut fatty acid 44.1 parts (0.21 mol) Dibutyltin oxide (catalyst) 0.03 part.
- the temperature was raised to 160 ° C. while stirring the contents, the temperature was gradually raised from 160 ° C. to 230 ° C. over 3 hours, and the reaction was continued at 230 ° C. for 30 minutes, and then the rectification column was replaced with a water separator.
- 5% xylene was added to the total charge, and the reaction was further proceeded at 230 ° C.
- the acid value reached 4 mgKOH / g
- the heating was stopped, 1500 (hydrocarbon solvent) was added for dilution to obtain a polyester resin (A1-1) solution having a solid content of 65%.
- the obtained resin had a number average molecular weight of 15,000, a hydroxyl value (mg number of potassium hydroxide required to neutralize 1 g of resin) 75 mg KOH / g, oil length 14.7%, iodine value 5>. .
- Production Examples 2 to 13 Solutions of polyester resins (A1-2) to (A1-13) having a solid content of 65% were obtained in the same manner as in Production Example 1 with the formulation shown in Table 1 below.
- the composition ratio of each component in Table 1 is a molar ratio.
- the number average molecular weight, hydroxyl value, oil length and iodine value of each resin are shown in Table 1.
- the polyester resins (A1-7) to (A1-13) in Production Examples 7 to 13 are resins for comparative examples.
- Antifouling paint composition No. 19 to 28 are coating compositions for comparative examples.
- KP color 8620 primer manufactured by Kansai Paint Co., Ltd., polyester-based primer for precoated steel sheet
- a molten 55% aluminum-galvanized steel sheet galvalume steel sheet having a thickness of 0.35 mm subjected to chemical conversion treatment
- the dry film thickness was 5 ⁇ m
- heated so that the maximum material arrival temperature was 220 ° C. was baked for 40 seconds to obtain a primer-coated steel sheet.
- each of the anti-stain coating compositions obtained as described above is applied with a bar coater so that the dry film thickness is about 15 ⁇ m, so that the maximum material temperature reaches 230 ° C.
- Each coated steel sheet was obtained by heating and baking for 50 seconds. The following performance test was done about each obtained coated steel plate.
- test results are also shown in Table 2 and Table 3.
- the quantity of each component in Table 2 and Table 3 is solid content mass.
- the white pigment, titanium dioxide was dispersed.
- a mixed solvent of cyclohexanone / swazol 1500 manufactured by Maruzen Petroleum Co., Ltd., aromatic petroleum high boiling solvent
- 60/40 mass ratio
- (Note 1) to (Note 11) are as follows.
- Uban 20SE-60 manufactured by Mitsui Chemicals, Inc., butyl etherified melamine resin, weight average molecular weight of about 4000.
- Super Becamine J820-60 Trade name “Super Becamine J-820-60”, manufactured by DIC Corporation, n-butyl etherified melamine resin solution.
- Super Becamine L-118-60 Trade name “Super Becamine L-118-60”, manufactured by DIC Corporation, n-butyl etherified melamine resin solution.
- Cymel 303 Low molecular weight methyl etherified melamine resin manufactured by Nippon Cytec Industries, Ltd.
- hexakis (methoxymethyl) melamine is 60% by weight or more.
- Sumidur BL3175 a methyl ethyl ketone oxime block compound of trimethylolpropane adduct type hexamethylene diisocyanate manufactured by Sumika Bayer Urethane Co., Ltd.
- MS56S trade name “MKC silicate MS56S” manufactured by Mitsubishi Chemical Corporation, methyl esterified silicate which is a condensate of tetramethoxysilane.
- MS58B30 manufactured by Mitsubishi Chemical Corporation, trade name “MKC silicate MS58B30”, methyl / butyl mixed esterified silicate which is a condensate of tetraalkoxysilane, the ratio of methyl / butyl number is 70/30.
- X-41-1805 manufactured by Shin-Etsu Chemical Co., Ltd., trade name, condensate of mercaptoalkyl group-containing trialkoxysilane, mercaptoalkyl group has 18 or less carbon atoms, alkoxy group has 6 or less carbon atoms It is.
- Thyroid 161W manufactured by GRACEGMMB, trade name, organically treated silica fine powder, oil absorption 170 ml / 100 g.
- Nacure 5225 An isopropanol solution of a neutralized secondary amine of dodecylbenzenesulfonic acid manufactured by King Industries, USA. The degree of neutralization of dodecylbenzenesulfonic acid / amine is about 1.1 (molar ratio). The active ingredient is about 33% by weight, of which dodecylbenzenesulfonic acid / amine (mass ratio) is about 8/25.
- the numerical values in Table 2 are parts by mass of solid content of dodecylbenzenesulfonic acid.
- Formate TK-1 A curing catalyst that is an organic tin solution manufactured by Takeda Pharmaceutical Company Limited, and a dissociation catalyst for blocked polyisocyanate compounds.
- 60 ° gloss The 60-degree specular reflectance was measured according to the 60-degree specular gloss specified in JISK-54007.6 (1990).
- Outdoor exposure test An outdoor exposure test specimen (100 x 300 mm) is attached to the installation base that models the eaves so that the coating film faces the north side, and an exposure test is conducted on the roof of Kansai Paint Co., Ltd. in Kanzaki-cho, Amagasaki City. Contamination resistance and rain-strip stain resistance (rain-stained stains) were evaluated according to the following criteria. Contamination resistance was measured by using a multi-light source spectrocolorimeter MSC-5N manufactured by Suga Test Instruments Co., Ltd. based on JISZ8370, the color difference ( ⁇ E) before and after exposure. Rain resistance stain resistance was judged visually.
- Contamination resistance The following criteria were evaluated by ⁇ E before and after the outdoor exposure test: S: ⁇ E is less than 2, A: ⁇ E is 2 or more and less than 3, B: ⁇ E is 3 or more and less than 5 C: ⁇ E is 5 or more.
- Rain resistant stain resistance Rain traces after outdoor exposure tests were evaluated according to the following criteria: S: Rain traces are not seen, A: Slight traces of rain stripes are observed, B: There are quite a few traces of rain C: Rain traces remain dark.
- Enhanced weather resistance Evaluation was made according to the following criteria by the degree of occurrence of chalking of the coated plate after the 7-cycle (161 hours) hydrogen peroxide xenon test: S: No choking is observed, A: Slight occurrence of choking is observed or slight whitening of the coating film is observed. B: Whitening is recognized, there is no glossiness, and choking has occurred slightly. C: Significant choking is observed.
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Abstract
Description
項1、(A)数平均分子量5000~30000、水酸基価5~100mgKOH/g、油長3~30%である脂肪酸変性ポリエステル樹脂(A1)を固形分として50~100質量%含有するポリエステル樹脂であって、
該脂肪酸変性ポリエステル樹脂(A1)が、
(a1):脂環族多塩基酸(a1-1)を含む多塩基酸、
(a2):3価以上の多価アルコール(a2-1)を含むアルコール、及び
(a3):脂肪酸
の反応によって得られ、
該反応において多塩基酸(a1)中の脂環族多塩基酸(a1-1)の含有量が、多塩基酸(a1)の総量を基準にして50~100mol%の範囲内、及び
アルコール(a2)中の3価以上の多価アルコール(a2-1)の含有量が、アルコール(a2)の総量を基準にして10~70mol%の範囲内である、ポリエステル樹脂;
(B)ブチルエーテル化メラミン樹脂(B1)を固形分として50~100質量%含有するメラミン樹脂;及び
(C)下記一般式で表されるオルガノシリケート及び/又はその縮合物:
一般式:(R1)n-Si-(OR2)4-n
[式中、R1はエポキシ基又はメルカプト基で置換されていてもよい炭素数1~18のアルキル基又はフェニル基であり、R2は炭素数が1~6のアルキル基であり、nは0又は1である。]
を含有し、
(C)成分の固形分含有量が、(A)成分及び(B)成分の固形分総量を基準にして、0.1~50質量%である耐汚染塗料組成物。
項2、脂肪酸変性ポリエステル樹脂(A1)を得る反応において、多塩基酸成分(a1)中の脂環族多塩基酸(a1-1)の合計含有量が、多塩基酸成分(a1)の総量を基準として、85~100mol%の範囲内である項1に記載の耐汚染塗料組成物。
項3、ポリエステル樹脂成分(A)及びメラミン樹脂成分(B)の固形分総量を基準にして、ポリエステル樹脂成分(A)を固形分として50~90質量%、及びメラミン樹脂成分(B)を固形分として10~50質量%含有する項1又は2に記載の耐汚染塗料組成物。
項4、脂環族多塩基酸(a1-1)が、1,2-シクロヘキサンジカルボン酸、1,3-シクロヘキサンジカルボン酸、1,4-シクロヘキサンジカルボン酸、4-シクロヘキセン-1,2-ジカルボン酸、3-メチル-1,2-シクロヘキサンジカルボン酸、4-メチル-1,2-シクロヘキサンジカルボン酸、1,2,4-シクロヘキサントリカルボン酸および1,3,5-シクロヘキサントリカルボン酸の脂環族多価カルボン酸、該脂環族多価カルボン酸の無水物、並びに、該脂環族多価カルボン酸の低級アルキルエステル化物からなる群から選択される少なくとも1種である項1~3のいずれか1項に記載の耐汚染塗料組成物。
項5、3価以上の多価アルコール(a2-1)が、グリセリン、トリメチロールエタン、トリメチロールプロパン、ジグリセリン、トリグリセリン、1,2,6-ヘキサントリオール、ペンタエリスリトール、ジペンタエリスリトール、ソルビトールおよびマンニットの3価以上のアルコール;該3価以上のアルコールにラクトン化合物を付加させたポリラクトンポリオール化合物;並びに、トリス(ヒドロキシアルキル)イソシアヌレートからなる群から選択される少なくとも1種である項1~4のいずれか1項に記載の耐汚染塗料組成物。
項6、脂肪酸(a3)が、ヤシ油脂肪酸、綿実油脂肪酸、麻実油脂肪酸、米ぬか油脂肪酸、魚油脂肪酸、トール油脂肪酸、大豆油脂肪酸、アマニ油脂肪酸、桐油脂肪酸、ナタネ油脂肪酸、ヒマシ油脂肪酸、脱水ヒマシ油脂肪酸、サフラワー油脂肪酸、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、オレイン酸、リノール酸およびリノレン酸からなる群から選択される少なくとも1種の直鎖炭化水素の1価のカルボン酸である、項1~5のいずれか1項に記載の耐汚染塗料組成物。
項7、さらに、艶消し剤(D)を含有する項1~6のいずれか1項に記載の耐汚染塗料組成物。
項8、艶消し剤(D)を、ポリエステル樹脂(A)及びメラミン樹脂(B)の固形分総量に対し、固形分として0.1~30質量%含有する、項7に記載の耐汚染塗料組成物。
項9、金属板上の片面又は両面上に、クロムフリープライマー塗料によりプライマー塗膜を形成する工程、及び
前記形成されたプライマー塗膜の少なくとも一方の上に、項1~8のいずれか1項に記載の耐汚染塗料組成物により上塗塗膜を形成する工程
を含むことを特徴とする塗膜形成方法。
項10、金属板上の片面又は両面上に、クロムフリープライマー塗料によりプライマー塗膜を形成する工程、及び
前記形成されたプライマー塗膜の少なくとも一方の上に、項1~8のいずれか1項に記載の耐汚染塗料組成物により上塗塗膜を形成する工程
を含むことを特徴とする塗装金属板の製造方法。
項11、項9または10に記載の方法により得られる、塗装金属板。
本発明の耐汚染塗料組成物は、下記のポリエステル樹脂成分(A)、メラミン樹脂成分(B)及び、オルガノシリケート及び/又はその縮合物成分(C)を含有する塗料組成物である。
本発明の塗料組成物においてポリエステル樹脂成分(A)は、下記脂肪酸変性ポリエステル樹脂(A1)を、ポリエステル樹脂成分(A)の固形分総量に対して、固形分として50~100質量%含有する。
ポリエステル樹脂成分(A)の必須成分である脂肪酸変性ポリエステル樹脂(A1)は、下記多塩基酸成分(a1)、アルコール成分(a2)及び脂肪酸(a3)の反応によって得られる。
上記脂肪酸変性ポリエステル樹脂(A1)を得る反応において、多塩基酸成分(a1)は、脂環族多塩基酸(a1-1)を含有し、多塩基酸成分(a1)中の脂環族多塩基酸(a1-1)の合計含有量が、多塩基酸成分(a1)の総量を基準にして、50~100mol%の範囲内である。脂環族多塩基酸(a1-1)の合計含有量は、好ましくは70~100mol%、さらに好ましくは85~100mol%の範囲内である。
上記脂肪酸変性ポリエステル樹脂(A1)を得る反応において、アルコール成分(a2)は、3価以上の多価アルコール(a2-1)を含有し、アルコール成分(a2)中の3価以上の多価アルコール(a2-1)の合計含有量が、アルコール成分(a2)の総量を基準にして、10~70mol%の範囲内である。3価以上の多価アルコール(a2-1)の合計含有量は、好ましくは20~65mol%、さらに好ましくは30~60mol%の範囲内である。
上記脂肪酸変性ポリエステル樹脂(A1)を得る反応において、脂肪酸(a3)は、直鎖炭化水素の1価のカルボン酸であり、例えば、ヤシ油脂肪酸、綿実油脂肪酸、麻実油脂肪酸、米ぬか油脂肪酸、魚油脂肪酸、トール油脂肪酸、大豆油脂肪酸、アマニ油脂肪酸、桐油脂肪酸、ナタネ油脂肪酸、ヒマシ油脂肪酸、脱水ヒマシ油脂肪酸、サフラワー油脂肪酸等の脂肪酸;ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、オレイン酸、リノール酸、リノレン酸等を挙げることができる。上記脂肪酸は単独でもしくは2種以上組み合わせて使用することができる。
本発明の塗料組成物において、メラミン樹脂成分(B)は、下記ブチルエーテル化メラミン樹脂(B1)を、メラミン樹脂成分(B)の固形分総量に対して、固形分として50~100質量%含有する。
ブチルエーテル化メラミン樹脂は、メラミンとホルムアルデヒド、パラホルムアルデヒドなどのアルデヒド成分との付加反応生成物(1量体及び多量体のいずれであってもよい)であるメチロール化メラミン樹脂中のメチロール基の一部又は全部を、n-ブチルアルコール又はイソブチルアルコールでエーテル化したメラミン樹脂である。ここで、ブチルエーテル化メラミン樹脂には、メチロール化メラミン樹脂中のメチロール基の一部又は全部を、n-ブチルアルコールでエーテル化したメラミン樹脂、イソブチルアルコールでエーテル化したメラミン樹脂、n-ブチルアルコール及びイソブチルアルコールでエーテル化したメラミン樹脂のいずれも含まれる。得られる塗膜の加工性、及び耐汚染性等の点から、該ブチルエーテル化メラミン樹脂の数平均分子量が800~8000、特に、1000~5000の範囲にあることが好ましい。ブチルエーテル化メラミン樹脂(B1)は、1種で又は2種以上の混合物として使用することができる。
本発明の(C)成分は、
一般式:(R1)n-Si-(OR2)4-n
[式中、R1はエポキシ基又はメルカプト基で置換されていてもよい炭素数1~18のアルキル基又はフェニル基であり、R2は炭素数が1~6のアルキル基であり、nは0または1である。]
で表わされるオルガノシリケート及び/又はその縮合物である。
本発明の塗膜形成方法は、金属板上の片面又は両面上に、クロム含有防錆成分を含有しないことを特徴とするクロムフリープライマー塗料によるプライマー塗膜を形成し、プライマー塗膜の少なくとも一方の上に、上記本発明の耐汚染塗料組成物による上塗塗膜を形成してなることを特徴とする塗膜形成方法である。
前記形成されたプライマー塗膜の少なくとも一方の上に、上記本発明の耐汚染塗料組成物により上塗塗膜を形成する工程
を含むことを特徴とする塗膜形成方法である。
製造例1
温度計、攪拌機、加熱装置及び精留塔を備えたフラスコ内に下記原材料を仕込んだ:
1,2-シクロヘキサンジカルボン酸無水物 150.9部(0.98モル)
ネオペンチルグリコール 38.9部(0.37モル)
ブチルエチルプロパンジオール 9.6部(0.06モル)
トリメチロールプロパン 77.8部(0.57モル)
ヤシ油脂肪酸 44.1部(0.21モル)
ジブチル錫オキサイド(触媒) 0.03部。
下記表1に示す配合にて、製造例1と同様にして、固形分65%の各ポリエステル樹脂(A1-2)~(A1-13)の溶液を得た。表1の各成分の組成比はモル比である。
実施例1~18及び比較例1~10
後記表2及び表3に示す組成にて塗料化を行い、各耐汚染塗料組成物No.1~28を得た。耐汚染塗料組成物No.19~28は比較例用の塗料組成物である。
(注1)ユーバン20SE-60:三井化学(株)社製、ブチルエーテル化メラミン樹脂、重量平均分子量約4000。
(注2)スーパーベッカミンJ820-60:商品名「スーパーベッカミンJ-820-60」、DIC(株)製、n-ブチルエーテル化メラミン樹脂溶液。
(注3)スーパーベッカミンL-118-60:商品名「スーパーベッカミンL-118-60」、DIC(株)製、n-ブチルエーテル化メラミン樹脂溶液。
(注4)サイメル303:日本サイテックインダストリイズ(株)製、低分子量メチルエーテル化メラミン樹脂。ヘキサキス(メトキシメチル)メラミンの含有量が60重量%以上。
(注5)スミジュールBL3175:住化バイエルウレタン(株)製、トリメチロールプロパンアダクト型ヘキサメチレンジイソシアネートのメチルエチルケトンオキシムブロック化合物。
(注6)MS56S:三菱化学(株)製、商品名「MKCシリケートMS56S」、テトラメトキシシランの縮合物であるメチルエステル化シリケート。
(注7)MS58B30:三菱化学(株)製、商品名「MKCシリケートMS58B30」、テトラアルコキシシランの縮合物であるメチル/ブチル混合エステル化シリケート、メチル/ブチル数の比率は70/30。
(注8)X-41-1805:信越化学工業(株)製、商品名、メルカプトアルキル基含有トリアルコキシシランの縮合物、メルカプトアルキル基の炭素数は18以下、アルコキシ基の炭素数は6以下である。
(注9)サイロイド161W:GRACEGMBH社製、商品名、有機処理されたシリカ微粉末、吸油量170ml/100g。
(注10)Nacure5225:米国キング・インダストリーズ製、ドデシルベンゼンスルホン酸の第2級アミン中和物のイソプロパノール溶液。ドデシルベンゼンスルホン酸/アミンの中和度は約1.1(モル比)。有効成分約33重量%で、うち、ドデシルベンゼンスルホン酸/アミン(質量比)は約8/25。表2中の数値は、ドデシルベンゼンスルホン酸の固形分質量部である。
(注11)フォーメートTK-1:武田薬品工業(株)製の有機錫溶液である硬化触媒、ブロック化ポリイソシアネート化合物の解離触媒。
JISK-54007.6(1990)に規定の60度鏡面光沢度に従い、60度鏡面反射率を測定した。
20℃の室内において、塗面を外側にして試験板を180度折曲げて、折曲げ部分にワレが発生しなくなるT数を表示した。T数とは、折曲げ部分の内側に何もはさまずに180度折曲げを行なった場合を0T、試験板と同じ厚さの板を1枚はさんで折曲げた場合、1T、2枚の場合2T、3枚の場合3T、4枚の場合4T、5枚の場合5T、6枚の場合6Tとした。結果を以下により判定した。:A:4T曲げ加工において、殆どワレが認められない、
B:4T曲げ加工では明らかなワレが認められるが、6T曲げ加工において殆どワレが認められない、
C:6T曲げ加工において、明らかなワレが認められる。
屋外曝露試験試験片(100×300mm)を、軒先をモデル化した設置台に、北側に塗膜を面するように取り付け、尼崎市神崎町の関西ペイント(株)屋上にて曝露試験を行い、耐汚染性及び耐雨筋汚染性(雨筋状の汚れ跡)を下記基準にて評価した。耐汚染性は曝露前後の色差(ΔE)をJISZ8370に基づいて、スガ試験機(株)製の多光源分光測色計MSC-5Nを用いて測定した。耐雨筋汚染性は目視にて判定した。
屋外曝露試験前後でのΔEにより以下の基準により評価した:
S:ΔEが2未満、
A:ΔEが2以上かつ3未満、
B:ΔEが3以上かつ5未満、
C:ΔEが5以上。
屋外暴露試験後の雨筋跡を以下の基準により評価した:
S:雨筋跡が見られない、
A:雨筋跡がわずかに認められる、
B:雨筋跡がかなり認められる、
C:雨筋跡が濃く残る。
過酸化水素キセノン7サイクル(161時間)試験後の塗板のチョーキング発生具合により以下の基準により評価した:
S:チョーキングの発生が認められない、
A:チョーキングの発生がわずかに認められるか、又は塗膜の白化がわずかに認められる、
B:白化が認められ、光沢感がなく、チョーキングがやや発生している、
C:著しいチョーキングの発生が認められる。
耐汚染塗料組成物においては、被塗物の加工性、得られる塗膜の耐汚染性、耐雨筋汚染性及び促進耐候性の全てが高いことが重要である。従って、以下の基準にて総合評価を行なった。
S:加工性、耐汚染性、耐雨筋汚染及び促進耐候性の評価がすべてS又はAであり、かつ少なくとも1つがSである、
A:加工性、耐汚染性、耐雨筋汚染及び促進耐候性の評価がすべてAである、
B:加工性、耐汚染性、耐雨筋汚染及び促進耐候性の評価がすべてS、A又はBであり、かつ少なくとも1つがBである
C:耐擦り傷性、初期付着性、及び耐候性の評価のうち少なくとも1つがCである。
Claims (11)
- (A)数平均分子量5000~30000、水酸基価5~100mgKOH/g、油長3~30%である脂肪酸変性ポリエステル樹脂(A1)を固形分として50~100質量%含有するポリエステル樹脂であって、
該脂肪酸変性ポリエステル樹脂(A1)が、
(a1):脂環族多塩基酸(a1-1)を含む多塩基酸、
(a2):3価以上の多価アルコール(a2-1)を含むアルコール、及び
(a3):脂肪酸
の反応によって得られ、
該反応において多塩基酸(a1)中の脂環族多塩基酸(a1-1)の含有量が、多塩基酸(a1)の総量を基準にして50~100mol%の範囲内、及び
アルコール(a2)中の3価以上の多価アルコール(a2-1)の含有量が、アルコール(a2)の総量を基準にして10~70mol%の範囲内である、ポリエステル樹脂;
(B)ブチルエーテル化メラミン樹脂(B1)を固形分として50~100質量%含有するメラミン樹脂;及び
(C)下記一般式で表されるオルガノシリケート及び/又はその縮合物:
一般式:(R1)n-Si-(OR2)4-n
[式中、R1はエポキシ基又はメルカプト基で置換されていてもよい炭素数1~18のアルキル基又はフェニル基であり、R2は炭素数が1~6のアルキル基であり、nは0又は1である。]
を含有し、
(C)成分の固形分含有量が、(A)成分及び(B)成分の固形分総量を基準にして、0.1~50質量%である耐汚染塗料組成物。 - 脂肪酸変性ポリエステル樹脂(A1)を得る反応において、多塩基酸成分(a1)中の脂環族多塩基酸(a1-1)の合計含有量が、多塩基酸成分(a1)の総量を基準として、85~100mol%の範囲内である請求項1に記載の耐汚染塗料組成物。
- ポリエステル樹脂成分(A)及びメラミン樹脂成分(B)の固形分総量を基準にして、ポリエステル樹脂成分(A)を固形分として50~90質量%、及びメラミン樹脂成分(B)を固形分として10~50質量%含有する請求項1に記載の耐汚染塗料組成物。
- 脂環族多塩基酸(a1-1)が、1,2-シクロヘキサンジカルボン酸、1,3-シクロヘキサンジカルボン酸、1,4-シクロヘキサンジカルボン酸、4-シクロヘキセン-1,2-ジカルボン酸、3-メチル-1,2-シクロヘキサンジカルボン酸、4-メチル-1,2-シクロヘキサンジカルボン酸、1,2,4-シクロヘキサントリカルボン酸および1,3,5-シクロヘキサントリカルボン酸の脂環族多価カルボン酸、該脂環族多価カルボン酸の無水物、並びに、該脂環族多価カルボン酸の低級アルキルエステル化物からなる群から選択される少なくとも1種である請求項1に記載の耐汚染塗料組成物。
- 3価以上の多価アルコール(a2-1)が、グリセリン、トリメチロールエタン、トリメチロールプロパン、ジグリセリン、トリグリセリン、1,2,6-ヘキサントリオール、ペンタエリスリトール、ジペンタエリスリトール、ソルビトールおよびマンニットの3価以上のアルコール;該3価以上のアルコールにラクトン化合物を付加させたポリラクトンポリオール化合物;並びに、トリス(ヒドロキシアルキル)イソシアヌレートからなる群から選択される少なくとも1種である請求項1に記載の耐汚染塗料組成物。
- 脂肪酸(a3)が、ヤシ油脂肪酸、綿実油脂肪酸、麻実油脂肪酸、米ぬか油脂肪酸、魚油脂肪酸、トール油脂肪酸、大豆油脂肪酸、アマニ油脂肪酸、桐油脂肪酸、ナタネ油脂肪酸、ヒマシ油脂肪酸、脱水ヒマシ油脂肪酸、サフラワー油脂肪酸、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、オレイン酸、リノール酸およびリノレン酸からなる群から選択される少なくとも1種の直鎖炭化水素の1価のカルボン酸である、請求項1に記載の耐汚染塗料組成物。
- さらに、艶消し剤(D)を含有する請求項1に記載の耐汚染塗料組成物。
- 艶消し剤(D)を、ポリエステル樹脂(A)及びメラミン樹脂(B)の固形分総量に対し、固形分として0.1~30質量%含有する、請求項7に記載の耐汚染塗料組成物。
- 金属板上の片面又は両面上に、クロムフリープライマー塗料によりプライマー塗膜を形成する工程、及び
前記形成されたプライマー塗膜の少なくとも一方の上に、請求項1に記載の耐汚染塗料組成物により上塗塗膜を形成する工程
を含むことを特徴とする塗膜形成方法。 - 金属板上の片面又は両面上に、クロムフリープライマー塗料によりプライマー塗膜を形成する工程、及び
前記形成されたプライマー塗膜の少なくとも一方の上に、請求項1に記載の耐汚染塗料組成物により上塗塗膜を形成する工程
を含むことを特徴とする塗装金属板の製造方法。 - 請求項9または10に記載の方法により得られる、塗装金属板。
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US10759962B2 (en) | 2015-04-17 | 2020-09-01 | Allnex Netherlands B.V. | Method for applying RMA crosslinkable coating on modified epoxy primer coating |
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JP7034711B2 (ja) | 2015-04-17 | 2022-03-14 | オールネックス・ネザーランズ・ビー.ブイ. | 易洗浄性コーティングのためのrma架橋性組成物およびrma架橋性樹脂 |
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US11214705B2 (en) | 2015-09-25 | 2022-01-04 | Akzo Nobel Coatings International B.V. | Thermosetting composition, paint finishing method, and method for producing painted articles |
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AU2016325294B2 (en) * | 2015-09-25 | 2020-04-09 | Akzo Nobel Coatings International B.V. | Thermosetting composition, paint finishing method, and method for producing painted articles |
WO2023082987A1 (en) * | 2021-11-09 | 2023-05-19 | Guangdong Huarun Paints Co., Ltd. | Solvent-borne acid-curing coating composition and coated article |
Also Published As
Publication number | Publication date |
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TWI518152B (zh) | 2016-01-21 |
JPWO2012002095A1 (ja) | 2013-08-22 |
CN102971388A (zh) | 2013-03-13 |
JP5705220B2 (ja) | 2015-04-22 |
TW201209113A (en) | 2012-03-01 |
CN102971388B (zh) | 2016-01-06 |
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