WO2021199875A1 - Matériau d'ailette en aluminium - Google Patents

Matériau d'ailette en aluminium Download PDF

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Publication number
WO2021199875A1
WO2021199875A1 PCT/JP2021/008312 JP2021008312W WO2021199875A1 WO 2021199875 A1 WO2021199875 A1 WO 2021199875A1 JP 2021008312 W JP2021008312 W JP 2021008312W WO 2021199875 A1 WO2021199875 A1 WO 2021199875A1
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WO
WIPO (PCT)
Prior art keywords
film
hydrophilic
fin material
aluminum
surfactant
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PCT/JP2021/008312
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English (en)
Japanese (ja)
Inventor
慶太 館山
亮介 角田
Original Assignee
株式会社神戸製鋼所
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Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to CN202180024118.6A priority Critical patent/CN115315609A/zh
Publication of WO2021199875A1 publication Critical patent/WO2021199875A1/fr

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    • 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
    • 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
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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
    • 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
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish

Definitions

  • the present invention relates to an aluminum fin material, and more particularly to an aluminum fin material preferably used for a heat exchanger such as an air conditioner.
  • Heat exchangers are used in products in various fields such as room air conditioners, packaged air conditioners, freezing showcases, refrigerators, oil coolers, and radiators.
  • As a material for fins of a heat exchanger aluminum or an aluminum alloy having excellent thermal conductivity, workability, corrosion resistance, etc. is generally used.
  • Plate fin type and plate and tube type heat exchangers have a structure in which fins are arranged side by side at narrow intervals.
  • Patent Document 1 proposes a technique of applying and forming a hydrophilic film on the surface of fins.
  • the fins may have pollutants mainly composed of oily components derived from suspended matter volatilized and scattered from building materials, foods, daily necessities, etc., adhering to the surface. Since such pollutants are water-repellent substances, their hydrophilicity deteriorates when they adhere to the surface of fins. In order to make it difficult for such a water-repellent substance to adhere to the surface of the fin, it is effective to impart hydrophilicity and oil repellency to the fin material at the same time.
  • Patent Document 2 discloses an aluminum fin material having a coating film having both hydrophilicity and oil repellency by containing a predetermined amount of a polyvinyl alcohol-based resin having a saponification degree of 90% or more in a hydrophilic resin. ..
  • an object of the present invention is to provide an aluminum fin material that has both oil repellency that can suitably suppress the adhesion of pollutants and very good hydrophilicity.
  • the present invention relates to the following [1] to [8].
  • An aluminum plate, a hydrophilic film, and a functional film are provided in this order.
  • the hydrophilic film contains a surfactant and a hydrophilic resin
  • the functional film contains a silicone component.
  • the surfactant is an aluminum fin material having an alkyl chain as a parent oil group and having 16 or less carbon atoms in the alkyl chain.
  • the anionic surfactant contains at least one compound selected from the group consisting of polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl ether sulfate, and polyoxyethylene alkyl sulfosuccinate.
  • the aluminum fin material according to any one of [1] to [4], wherein the amount of the silicone component adhered to the functional film is 0.0010 to 1.0 g / m 2.
  • an aluminum fin material having both very good oil repellency and hydrophilicity.
  • an aluminum fin material in which the adhesion of pollutants is suitably suppressed, the water splash is prevented, and the ventilation resistance is reduced.
  • FIG. 1 is a schematic cross-sectional view showing an aspect of the structure of an aluminum fin material.
  • the aluminum fin material 10 (hereinafter, may be simply referred to as a fin material) according to the present embodiment includes an aluminum plate 1, a hydrophilic film 2, and a functional film 3. It prepares in order.
  • a corrosion-resistant film may be provided between the aluminum plate 1 and the hydrophilic film 2, and a base treatment layer may be further provided between the aluminum plate 1 and the corrosion-resistant film.
  • the functional film 3 is preferably formed on the hydrophilic film 2.
  • At least one surface of the aluminum plate 1 may have the above configuration, and both sides of the aluminum plate 1 may have the above configuration. Further, when both sides of the aluminum plate 1 have the above configuration, both sides do not have to have the same mode.
  • the hydrophilic film 2 contains a surfactant and a hydrophilic resin, and the surfactant has an alkyl chain as a parent oil group.
  • the alkyl chain has 16 or less carbon atoms.
  • the functional film 3 contains a silicone component.
  • the fin material can suppress the deterioration of hydrophilicity by suppressing the adhesion of pollutants containing an oily component as a main component, regardless of whether or not it is in the cooling operation.
  • the aluminum plate is a concept including a plate made of aluminum and a plate made of an aluminum alloy, and an aluminum plate conventionally used for an aluminum fin material can be used.
  • As the aluminum plate 1000 series aluminum specified in JIS H 4000: 2014 is preferable because it is excellent in thermal conductivity and workability. More specifically, aluminum having alloy numbers 1050, 1050, and 1200 is more preferable as the aluminum plate. However, the above description does not exclude the use of 2000 to 9000 series aluminum alloys or other aluminum plates as the aluminum plate.
  • the thickness of the aluminum plate shall be appropriately desired according to the application and specifications of the fin material.
  • the fin material for the heat exchanger preferably has a thickness of 0.08 mm or more, more preferably 0.1 mm or more, from the viewpoint of fin strength and the like.
  • the thickness is preferably 0.3 mm or less, more preferably 0.2 mm or less.
  • the hydrophilic film is a film that imparts hydrophilicity to the surface of the fin material, and contains a hydrophilic resin and a surfactant. As a result, even when a functional film is provided on the hydrophilic film, it is possible to achieve both oil repellency due to the functional film and very good hydrophilicity. This is considered to be due to the expression action of the surfactant.
  • the hydrophilic film is formed by applying a resin coating material containing a hydrophilic resin and a surfactant on an aluminum plate, or when a base treatment layer or a corrosion-resistant film is provided on the aluminum plate, applying, drying, etc. on the layer or film. It can be formed by solidifying with.
  • the surfactant has a hydrophilic group and a base oil group, and has an alkyl chain having 6 to 16 carbon atoms as the base oil group. This is expected to increase the fluidity of the hydrophilic component in the hydrophilic film, and as a result, the distribution of the hydrophilic component in the entire hydrophilic film can be achieved. That is, the effect of improving the hydrophilicity by the hydrophilic film can be ensured.
  • the number of carbon atoms of the alkyl chain may be 16 or less, but 14 or less from the viewpoint that the surfactant is more preferably dispersed in the hydrophilic film and the effect of improving the hydrophilicity of the surfactant can be more appropriately exhibited. Is preferable, and 10 or less is more preferable.
  • the number of carbon atoms in the alkyl chain is preferably 6 or more, and more preferably 8 or more, from the viewpoint that the function of the hydrophobic group as a surfactant can be suitably exhibited.
  • the alkyl chain may be linear or branched.
  • anionic, cationic, and nonionic surfactants can be applied, but anionic or cationic surfactants are preferable from the viewpoint of maintaining both hydrophilicity and oil repellency for a long period of time, and anionic surfactants are more preferable. preferable.
  • the anionic surfactant may include, for example, at least one compound selected from the group consisting of polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl ether sulfate, and polyoxyethylene alkyl sulfosuccinate. , More preferable from the viewpoint of improving hydrophilicity.
  • Adhesion amount of the surfactant in the hydrophilic coating preferably from 0.0003 g / m 2 or more, more preferably 0.0005 g / m 2 or more, 0.001 g / m 2 or more More preferably, 0.005 g / m 2 or more is even more preferable.
  • the amount of the surfactant adhered is preferably 0.7 g / m 2 or less, more preferably 0.5 g / m 2 or less. It is preferably 0.05 g / m 2 or less, and more preferably 0.05 g / m 2 or less.
  • the hydrophilic resin may have a hydrophilic group and may contain one kind of resin or two or more kinds of resins.
  • the hydrophilic group include a hydroxyl group (hydroxy group), a carboxyl group, a sulfonic acid group, a polyether group and the like.
  • examples of those having a hydroxyl group include polyethylene glycol (PEG, PEO) and polyvinyl alcohol (PVA).
  • Examples of those having a carboxyl group include polyacrylic acid (PAA) and the like.
  • Examples of those having a hydroxy group and a carboxyl group include carboxymethyl cellulose (CMC).
  • Examples of those having a sulfonic acid group include sulfoethyl acrylate.
  • examples of those having a polyether group include polyethylene glycol (PEG, PEO) and modified compounds thereof.
  • two or more copolymers of monomers having a hydrophilic group can also be applied, and for example, a copolymer of acrylic acid and sulfoethyl acrylate is preferable.
  • a copolymer the method of arranging the monomers such as an alternating copolymer, a block copolymer, a graft copolymer, and a random copolymer is not particularly limited.
  • Adhesion amount of the hydrophilic resin in the hydrophilic coating is sufficient from the viewpoint of obtaining a hydrophilic 0.05 g / m 2 or more preferably, 0.1 g / m 2 or more preferably, 0.3 g / m 2 or more and more preferable. Further, from the viewpoint of preventing the hydrophilic resin from eluting when the surface of the fin material gets wet with water and inhibiting the oil repellency of the functional film, the amount of the hydrophilic resin adhered is preferably 5 g / m 2 or less. 1 g / m 2 or less is more preferable, and 0.8 g / m 2 or less is further preferable.
  • the hydrophilic film may contain other optional components as long as the effects of the present invention are not impaired.
  • the optional component include various aqueous solvents and paint additives for improving the paintability, workability, and physical properties of the film.
  • the paint additive include a water-soluble organic solvent, a cross-linking agent, a surface conditioner, a wet dispersant, an antioxidant, an antioxidant, an antifoaming agent, a rust preventive, an antibacterial agent, and an antifungal agent. .. These paint additives may contain one kind or two or more kinds.
  • the thickness of the hydrophilic film is not particularly limited, but assuming that the density of the hydrophilic film is 1 g / cm 3 , 0.01 ⁇ m or more is preferable, 0.1 ⁇ m or more is more preferable, and 0 is obtained from the viewpoint of obtaining good hydrophilicity. .3 ⁇ m or more is more preferable. Further, from the viewpoint of obtaining good coating workability at the time of film formation, 5 ⁇ m or less is preferable, 1 ⁇ m or less is more preferable, and 0.8 ⁇ m or less is further preferable.
  • the film thickness of the hydrophilic film is determined by the concentration of the coating composition used for forming the hydrophilic film and the bar coater No. 1 used for forming the film. It can be adjusted by selecting.
  • the functional film contains a silicone component.
  • the functional film formed on the outermost surface of the fin material to suppress the adhesion of pollutants contains a silicone component that has low surface free energy and is considered to have low substance adhesion, so that pollutants centered on oily components Adhesion can be reduced.
  • the functional film is a lubricating film that enhances the lubricity of the surface of the fin material
  • it is preferable to further contain a resin that enhances the lubricity (hereinafter, may be referred to as a functional resin).
  • a functional resin When the lubricating film contains a functional resin, the friction coefficient on the surface of the fin material is reduced, and the press moldability when the fin material is processed into fins is improved.
  • the functional film can be formed by applying a paint containing a silicone component and, if necessary, a functional resin onto the hydrophilic film, and solidifying the coating by drying or the like.
  • the silicone component is a polymer of a silicon compound, and is a compound having a siloxane bond as a skeleton.
  • the silicone component is one or more functional groups selected from a polyether group, an epoxy group, a methacryl group, an amino group, a phenyl group, a hydrogen group, and a hydroxyl group because of its high dispersibility in a coating material and high fixability in a resin film. It is preferable to contain a modified polydimethylsiloxane derivative having the above in the structure, and the modified polydimethylsiloxane having one or more functional groups selected from the group consisting of an epoxy group, a methacryl group, a phenyl group and a hydrogen group in the structure.
  • Silicone containing a long-chain alkyl group is also preferable.
  • any of nonionic, anionic and cationic can be used.
  • Adhesion amount of the silicone component in the functional coating sufficient oil repellency was obtained, and preferably from 0.0010 g / m 2 or more from the viewpoint of suppressing the adhesion of oil components, 0.006 g / m 2 or more, and 0 More preferably, it is 0.01 g / m 2 or more.
  • the silicone component since the silicone component exhibits both oil repellency and hydrophobicity, the amount of the silicone component adhered is 1.0 g / m 2 or less from the viewpoint of preventing the hydrophilic function of the hydrophilic film from being impaired. preferably, more preferably not more than 0.3 g / m 2, more preferably 0.1 g / m 2 or less, 0.05 g / m 2 or less and more preferably more.
  • examples of the functional resin include resins having a hydrophilic group.
  • the resin may contain one kind or two or more kinds.
  • examples of the hydrophilic group include a hydroxyl group (hydroxy group), a carboxyl group, a sulfonic acid group, a polyether group and the like.
  • examples of those having a hydroxyl group include polyethylene glycol (PEG, PEO) and polyvinyl alcohol (PVA).
  • examples of those having a carboxyl group include polyacrylic acid (PAA) and the like.
  • Examples of those having a hydroxy group and a carboxyl group include carboxymethyl cellulose (CMC).
  • Examples of those having a sulfonic acid group include sulfoethyl acrylate.
  • examples of those having a polyether group include polyethylene glycol (PEG, PEO) and modified compounds thereof. In addition to these, two or more copolymers of monomers having a hydrophilic group can also be applied. Among them, those having a hydroxyl group are preferable, and polyethylene glycol (PEG, PEO) is more preferable.
  • the functional film may contain other optional components as long as the effects of the present invention are not impaired.
  • the optional component include various aqueous solvents and paint additives for improving the paintability, workability, and physical properties of the film. Paint additives include, for example, water-soluble organic solvents, cross-linking agents, surfactants, surface conditioners, wet dispersants, anti-settling agents, antioxidants, defoamers, rust inhibitors, antibacterial agents, and antifungal agents. And so on. These paint additives may contain one kind or two or more kinds.
  • Adhesion amount of the functional resin in the functional coating is preferably from 0.01 g / m 2 or more from the viewpoint of obtaining sufficient lubricity, 0.03 g / m 2 or more preferably, 0.05 g / m 2 or more and more preferable.
  • the amount of adhesion is 5 g / g from the viewpoint of suppressing the elution of the functional resin and hindering the oil repellency and the deterioration of the application workability of the functional film.
  • the thickness of the functional film is not particularly limited, but assuming that the density of the functional film is 1 g / cm 3 , 0.001 ⁇ m or more is preferable, 0.01 ⁇ m or more is more preferable, and 0 is obtained from the viewpoint of obtaining good oil repellency. It is more preferably .03 ⁇ m or more. Further, from the viewpoint of obtaining good coating workability at the time of film formation, 5 ⁇ m or less is preferable, 1 ⁇ m or less is more preferable, and 0.5 ⁇ m or less is further preferable.
  • the film thickness of the functional film depends on the concentration of the coating composition used for forming the functional film and the bar coater No. used for forming the film. It can be adjusted by selecting.
  • the total film thickness of the hydrophilic film and the functional film is preferably 5 ⁇ m or less from the viewpoint of suppressing a decrease in heat exchange efficiency of the fin material.
  • the base treatment layer can be provided between the aluminum plate and the hydrophilic film, if desired.
  • the base treatment layer can be provided between the aluminum plate and the corrosion-resistant film.
  • the base treatment layer a conventionally known one can be used as long as it can impart corrosion resistance to the aluminum plate.
  • a layer composed of an inorganic oxide or an inorganic-organic composite compound can be used.
  • the inorganic material constituting the inorganic oxide or the inorganic-organic composite compound chromium (Cr), zirconium (Zr) or titanium (Ti) is preferable as the main component.
  • the layer made of inorganic oxide to be the base treatment layer for example, an aluminum plate is subjected to phosphoric acid chromate treatment, zirconium phosphate treatment, zirconium oxide treatment, chromic acid chromate treatment, zinc phosphate treatment, titanium phosphate treatment, or the like.
  • phosphoric acid chromate treatment zirconium phosphate treatment, zirconium oxide treatment, chromic acid chromate treatment, zinc phosphate treatment, titanium phosphate treatment, or the like.
  • the types of inorganic oxides are not limited to those formed by these treatments.
  • the layer made of an inorganic-organic composite compound to be a base treatment layer can be formed, for example, by subjecting an aluminum plate to a coating type chromate treatment, a coating type zirconium treatment, or the like.
  • Specific examples of such an inorganic-organic composite compound include an acrylic-zirconium complex and the like.
  • the film thickness of the base treatment layer is not particularly limited and may be set as appropriate, but it is formed so that the amount of adhesion per unit area is 1 to 100 mg / m 2 in terms of metal (Cr, Zr, Ti).
  • the film thickness is preferably 1 to 100 nm.
  • the amount of adhesion and the film thickness of the base treatment layer can be adjusted by adjusting the concentration of the chemical conversion treatment liquid used for film formation of the base treatment layer and the film formation treatment time.
  • the surface of the aluminum plate Before forming the base treatment layer, the surface of the aluminum plate may be degreased in advance with an alkaline degreasing liquid, which improves the reactivity of the base treatment and further improves the adhesion of the formed base treatment layer. improves.
  • the corrosion-resistant film is a layer that may be provided between the aluminum plate and the hydrophilic film mainly in order to enhance the corrosion resistance of the aluminum plate, and preferably contains a hydrophobic resin.
  • the corrosion resistant film is provided between the base treatment layer and the hydrophilic film.
  • the corrosion-resistant film can be formed, for example, by applying a resin paint containing a hydrophobic resin on an aluminum plate or an undercoat layer and solidifying it by drying or the like.
  • the corrosion-resistant film makes it difficult for moisture such as condensed water and ionic species such as oxygen and chloride ions to penetrate into the aluminum plate, and suppresses corrosion of the aluminum plate and formation of aluminum oxide that generates odor. ..
  • hydrophobic resin in the corrosion resistant film conventionally known ones can be used.
  • various resins such as polyester-based, polyolefin-based, epoxy-based, urethane-based, and acrylic-based resins can be mentioned, and one or a mixture of two or more of these can be applied.
  • the corrosion-resistant film may contain other optional components as long as the effects of the present invention are not impaired.
  • the optional component include various aqueous solvents and paint additives for improving the paintability, workability, and physical properties of the film. Paint additives include, for example, water-soluble organic solvents, cross-linking agents, surfactants, surface conditioners, wet dispersants, anti-settling agents, antioxidants, defoamers, rust inhibitors, antibacterial agents, and antifungal agents. And so on. These paint additives may contain one kind or two or more kinds.
  • Adhesion amount of the hydrophobic resin in the corrosion barrier coating is not particularly limited, from the viewpoint of imparting sufficient corrosion resistance to the aluminum plate, 0.01 g / m 2 or more preferably, 0.05 g / m 2 or more is more preferable.
  • the adhesion amount of the hydrophobic resin is preferably 8 g / m 2 or less, 4g / m 2 or less is more preferable.
  • the film thickness of the corrosion-resistant film is preferably 0.05 ⁇ m or more from the viewpoint of obtaining good corrosion resistance, and the film-forming property is good, defects such as cracks are reduced, and the heat transfer resistance of the corrosion-resistant film is suppressed to a low level.
  • the film thickness of the corrosion-resistant film and the amount of the hydrophobic resin attached are determined by the concentration of the coating composition used for forming the corrosion-resistant film and the bar coater No. used for the film formation. It can be adjusted by selecting.
  • the surface of the aluminum fin material according to the present embodiment exhibits extremely excellent hydrophilicity and oil repellency.
  • the contact angle when n-tetradecane is dropped on the surface of the fin material is more than 20 °, and the contact angle when pure water is dropped is less than 60 °. It is preferable from the viewpoint of achieving both hydrophilicity and oil repellency.
  • the contact angle when n-tetradecane is dropped is more preferably more than 25 °. Further, the contact angle when pure water is dropped is more preferably less than 40 °.
  • the contact angle can be measured with a goniometer, for example.
  • the thickness of the fin material varies depending on the application and is not particularly limited, but when used in a heat exchanger, for example, 0.08 mm or more is preferable, and 0.1 mm or more is more preferable from the viewpoint of strength that can withstand processing. Further, from the viewpoint of workability and heat exchange efficiency, the thickness is preferably 0.3 mm or less, more preferably 0.2 mm or less.
  • a base treatment layer or a corrosion-resistant film is preferably formed on an aluminum plate by a known method, and then a coating composition containing a hydrophilic resin and a surfactant is applied and dried to form a hydrophilic film. Next, a coating composition containing a silicone component and, if desired, a functional resin is applied and dried to form a functional film.
  • the coating composition contains a surfactant having an alkyl chain having 16 or less carbon atoms as a parent oil group, so that even if the functional film is provided, the functional film is formed.
  • a surfactant having an alkyl chain having 16 or less carbon atoms as a parent oil group
  • very good hydrophilicity can be achieved at the same time.
  • silicone component in the coating composition when forming the functional film, good oil repellency can be imparted, and adhesion of pollutants centering on the oily component can be suppressed.
  • the hydrophilic film, the functional film, and the corrosion-resistant film are formed by preparing a coating composition for forming each film, applying the coating composition to the object to be coated by a bar coater, a roll coating method, or the like, and baking the coating.
  • a bar coater e.g., a bar coater
  • a roll coating method e.g., a roll coating method
  • the baking temperature of the hydrophilic film, the functional film, and the corrosion-resistant film may be set according to the components of the resin or the like used, and is preferably in the range of 120 to 270 ° C., for example.
  • Example 1 As the aluminum plate, the standard of alloy number 1200 specified in JIS H 4000: 2014 with a thickness of 0.1 mm was used. A base treatment layer was formed on one surface of the aluminum plate by phosphoric acid chromate treatment. Next, a coating composition containing a corrosion-resistant film resin (acrylic resin, manufactured by Toagosei Co., Ltd.) was applied with a bar coater and baked to form a corrosion-resistant film having an adhesion amount of 4 mg / dm 2.
  • a corrosion-resistant film resin (acrylic resin, manufactured by Toagosei Co., Ltd.) was applied with a bar coater and baked to form a corrosion-resistant film having an adhesion amount of 4 mg / dm 2.
  • a resin composition containing an anionic surfactant (polyoxyethylene alkyl ether phosphoric acid ester) having 12 to 13 carbon atoms in the alkyl chain and a sulfonic acid group-containing acrylic resin as a hydrophilic resin is applied to the film.
  • the surface of the corrosion-resistant film was coated with a bar coater so that the amount of the hydrophilic resin adhered and the amount of the surfactant adhered were as shown in Table 1. Subsequently, it was baked at 200 ° C. to form a hydrophilic film having a thickness of 0.65 ⁇ m.
  • a coating composition containing a nonionic epoxy / polyether-modified silicone emulsion as a silicone component and polyethylene glycol as a functional resin was applied to the surface of the obtained hydrophilic film, and the amount of the functional resin adhered to the film and the amount of the functional resin adhered to the film.
  • the silicone component was applied to the surface of the hydrophilic film using a bar coater so that the amount of the silicone component adhered was as shown in Table 1. Subsequently, by baking at 160 ° C., a functional film having a thickness of 0.06 ⁇ m was formed, and an aluminum fin material was obtained.
  • Example 2 An aluminum fin material in the same manner as in Example 1 except that the surfactant in the hydrophilic film was changed to an anionic surfactant (polyoxyethylene alkyl ether phosphoric acid ester) having 8 carbon atoms in the alkyl acid.
  • Example 3 An aluminum fin material was obtained in the same manner as in Example 1 except that the surfactant in the hydrophilic film was changed to a nonionic surfactant (polyoxyalkylene alkyl ether) having 10 carbon atoms in the alkyl acid. ..
  • Example 4 An aluminum fin material was obtained in the same manner as in Example 1 except that the surfactant in the hydrophilic film was changed to a cationic surfactant (lauryldimethylethylammonium ethyl sulfate) having 12 carbon atoms in the alkyl acid. rice field.
  • a cationic surfactant laauryldimethylethylammonium ethyl sulfate
  • Example 1 An aluminum fin material in the same manner as in Example 1 except that the surfactant in the hydrophilic film was changed to an anionic surfactant (polyoxyethylene alkyl ether phosphoric acid ester) having 18 carbon atoms in the alkyl acid.
  • Example 5 An aluminum fin material was obtained in the same manner as in Example 1 except that the amount of the surfactant adhered to the hydrophilic film was applied to the surface of the corrosion-resistant film using a bar coater so as to have the values shown in Table 2. ..
  • Example 7 In the same manner as in Example 1 except that the amount of the functional resin adhered to the functional film and the amount of the silicone component adhered to the surface of the hydrophilic film were applied to the surface of the hydrophilic film using a bar coater so as to have the values shown in Table 3. An aluminum fin material was obtained.
  • Example 9 to 12 The same as in Example 1 except that the amount of the hydrophilic resin attached to the hydrophilic film and the amount of the surfactant attached to the surface of the corrosion-resistant film were applied to the surface of the corrosion-resistant film using a bar coater so as to have the values shown in Table 4. An aluminum fin material was obtained.
  • the obtained aluminum fin material was evaluated for hydrophilicity and oil repellency showing the ability to suppress the adhesion of contaminants by the methods shown below.
  • the oil repellency related to the excellent effect of suppressing the adhesion of pollutants and the extremely excellent hydrophilicity can be obtained. It turned out to be compatible.
  • a preferable amount of the attached amount is appropriately selected depending on the type of the surfactant. Is more preferable.
  • both hydrophilicity and oil repellency can be obtained. It can also be very good.

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Abstract

L'invention fournit un matériau d'ailette en aluminium qui concilie des propriétés hydrophiles très satisfaisantes et des propriétés oléofuges permettant d'inhiber de manière adéquate l'adhésion de contaminants. Plus précisément, l'invention concerne un matériau d'ailette en aluminium (10) qui est équipé dans l'ordre d'une plaque d'aluminium (1), d'un film de revêtement hydrophile (2) et d'un film de revêtement fonctionnel (3). Le film de revêtement hydrophile (2) comprend un tensio-actif et une résine hydrophile. Ledit film de revêtement fonctionnel (3) comprend un composant silicone. Ledit tensio-actif possède une chaîne alkyle en tant que groupe lipophile, le nombre d'atomes de carbone de ladite chaîne alkyle étant inférieur ou égal à 16.
PCT/JP2021/008312 2020-03-30 2021-03-03 Matériau d'ailette en aluminium WO2021199875A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01223188A (ja) * 1988-03-02 1989-09-06 Kansai Paint Co Ltd 熱交換器フイン材用親水化処理剤
JP3594972B2 (ja) * 1996-03-28 2004-12-02 日本軽金属株式会社 水性親水性皮膜処理剤及びその処理剤を使用する熱交換器用プレコートフィン材の製造方法
JP2006176855A (ja) * 2004-12-24 2006-07-06 Mitsubishi Paper Mills Ltd 熱交換器用アルミニウムフィン材の製造方法
JP2014029249A (ja) * 2012-07-31 2014-02-13 Mitsubishi Alum Co Ltd 熱交換器用フィン材及び熱交換器
JP2014199155A (ja) * 2013-03-29 2014-10-23 株式会社神戸製鋼所 アルミニウムフィン材およびその製造方法
JP2016191479A (ja) * 2015-03-30 2016-11-10 株式会社神戸製鋼所 アルミニウム製フィン材
JP2019094433A (ja) * 2017-11-22 2019-06-20 花王株式会社 親水化処理剤

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01223188A (ja) * 1988-03-02 1989-09-06 Kansai Paint Co Ltd 熱交換器フイン材用親水化処理剤
JP3594972B2 (ja) * 1996-03-28 2004-12-02 日本軽金属株式会社 水性親水性皮膜処理剤及びその処理剤を使用する熱交換器用プレコートフィン材の製造方法
JP2006176855A (ja) * 2004-12-24 2006-07-06 Mitsubishi Paper Mills Ltd 熱交換器用アルミニウムフィン材の製造方法
JP2014029249A (ja) * 2012-07-31 2014-02-13 Mitsubishi Alum Co Ltd 熱交換器用フィン材及び熱交換器
JP2014199155A (ja) * 2013-03-29 2014-10-23 株式会社神戸製鋼所 アルミニウムフィン材およびその製造方法
JP2016191479A (ja) * 2015-03-30 2016-11-10 株式会社神戸製鋼所 アルミニウム製フィン材
JP2019094433A (ja) * 2017-11-22 2019-06-20 花王株式会社 親水化処理剤

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