WO2016006374A1 - Composition de revêtement et procédé de formation d'un film de revêtement - Google Patents

Composition de revêtement et procédé de formation d'un film de revêtement Download PDF

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Publication number
WO2016006374A1
WO2016006374A1 PCT/JP2015/066373 JP2015066373W WO2016006374A1 WO 2016006374 A1 WO2016006374 A1 WO 2016006374A1 JP 2015066373 W JP2015066373 W JP 2015066373W WO 2016006374 A1 WO2016006374 A1 WO 2016006374A1
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Prior art keywords
film
infrared
coating film
film thickness
wet
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PCT/JP2015/066373
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English (en)
Japanese (ja)
Inventor
健志 西
瑞穂 本間
康人 引地
加藤　修
伸 原田
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中国塗料株式会社
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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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor

Definitions

  • the present invention can easily form a coating film having a desired thickness of 50 ⁇ m or more used for, for example, a ship, an offshore structure, a bridge, a building, a plant facility, a steel structure, a concrete structure, a transportation machine such as an automobile.
  • the present invention relates to a formable coating composition. Moreover, it is related with the formation method of the coating film which can form the coating film of a desired film thickness easily using the coating composition.
  • Measurement of film thickness inside ship structures is usually done using a wet gauge for wet coatings and an electromagnetic film thickness meter for dry coatings. Therefore, it is required to measure the film thickness at various locations.
  • a non-contact type film thickness measuring method As a method for measuring the film thickness, there is a non-contact type film thickness measuring method in addition to the above method, and one of the methods is a film thickness measuring method using infrared rays (for example, Patent Documents 1 and 2). ).
  • a film thickness measuring method using infrared rays for example, Patent Documents 1 and 2.
  • the film thickness measurement method using infrared rays could hardly be applied to such applications.
  • reflected infrared light is used for measuring the film thickness of the coating film, but all are techniques for thin films up to about several ⁇ m, and can measure a film thickness of 50 ⁇ m or more. It wasn't.
  • This invention is made
  • a configuration example of the present invention is as follows.
  • the infrared transmittance of the dried coating film (A) is 2% or more
  • the absolute value of the difference from the infrared reflectance Ra% measured from is 2% or more, A coating composition whose dry film thickness can be measured by infrared reflection intensity.
  • the infrared transmittance of the dried coating film (A) obtained by drying the wet coating film (A ′) is 2% or more
  • the absolute value of the difference from the infrared reflectance Ra% measured from the side where the dry coating film (A) is laminated is 2% or more
  • a coating composition capable of measuring wet film thickness by infrared reflection intensity is 2% or more.
  • the coating composition contains 0.03 to 3% by volume of an infrared reflective pigment with respect to 100% by volume of the dried coating film (A).
  • the coating composition as described.
  • the infrared reflective pigment is titanium dioxide, cuprous oxide, zinc oxide, dial, yellow dial, chrome green black hematite, manganese bismuth black pigment, chromium iron oxide, nickel antimony titanium yellow rutile, chromium antimony titanium buff [4]
  • the absolute value of the difference from the infrared reflectance Ra% measured from is 2% or more, After the coating composition is applied onto the article (C) and dried, A method for forming a dried coating film, wherein the dried coating film is judged to have reached a desired film thickness by measuring the infrared reflection intensity with an infrared reflection intensity measuring device.
  • the infrared transmittance of the dried coating film (A) is 10% or more, and the absolute value of the difference between Rc and Ra is 3% or more, [6] to [8] The forming method as described.
  • the infrared reflective pigment is titanium dioxide, cuprous oxide, zinc oxide, dial, yellow dial, chrome green black hematite, manganese bismuth black pigment, chromium iron oxide, nickel antimony titanium yellow rutile, chromium antimony titanium buff
  • the forming method according to [10] which is at least one pigment selected from the group consisting of rutile and rutile tin zinc.
  • the infrared reflection intensity measuring device analyzes a light source capable of emitting infrared rays, a sensor for detecting infrared intensity reflected when the object is irradiated with infrared rays, and an infrared reflection intensity detected by the sensor.
  • the present invention it is possible to provide a coating composition capable of easily measuring the thickness of a coating film (thick film of 50 ⁇ m or more) based on infrared reflection intensity, and a method for easily measuring the thickness of the coating film.
  • a coating composition capable of easily measuring the thickness of a coating film (thick film of 50 ⁇ m or more) based on infrared reflection intensity, and a method for easily measuring the thickness of the coating film.
  • the film thickness obtained after the coating film is dried can be determined by measuring the infrared reflection intensity in the state of the wet coating film.
  • the film thickness is measured by the infrared reflection intensity, the film thickness can be measured without any problem even at a painting site where there is not sufficient brightness.
  • the film thickness can be measured by a non-contact method, the film thickness can be quickly increased as compared with a film thickness measuring method using a contact film thickness meter such as a conventional wet gauge or electromagnetic film thickness meter. It can be measured and a great improvement in work efficiency can be expected.
  • a contact film thickness measurement method it is necessary to provide a scaffold for bringing a film thickness meter or the like into contact with the coating film. However, depending on the painting place, there are places where it is difficult to install such a scaffold. Since the present invention can measure the film thickness in a non-contact manner, the film thickness can be measured even in such a place.
  • the present invention since it is possible to control the film thickness of the wet coating film, it is possible to prevent the coating of an excessive amount of paint exceeding the amount that achieves a desired dry film thickness, Since the formation of a coating film having a film thickness exceeding the desired dry film thickness can be suppressed, a dry coating film in which cracks or the like hardly occur can be obtained.
  • FIG. 1 is a graph plotting the relationship between the film thickness of the top coat film obtained in Example 1 and the difference in infrared reflectance.
  • FIG. 2 is a graph in which the film thickness of the top coat film obtained in Example 1 and the digital level that is the infrared reflection intensity measured by the apparatus 1 are plotted.
  • FIG. 3 is a graph in which the film thickness of the top coat film obtained in Example 1 and the photodiode voltage, which is the infrared reflection intensity measured by the apparatus 2, are plotted.
  • FIG. 4 is a graph plotting the film thickness of the wet topcoat film obtained in Example 1 and the digital level, which is the infrared reflection intensity measured by the apparatus 1.
  • FIG. 5 is a graph plotting the relationship between the film thickness of the top coat film obtained in Example 2 and the difference in infrared reflectance.
  • FIG. 6 is a graph in which the film thickness of the top coat film obtained in Example 2 and the photodiode voltage, which is the infrared reflection intensity measured by the apparatus 2, are plotted.
  • FIG. 7 is a graph plotting the film thickness of the wet topcoat film obtained in Example 2 and the photodiode voltage, which is the infrared reflection intensity measured by the apparatus 2.
  • FIG. 8 is a graph plotting the relationship between the film thickness of the top coat film obtained in Example 3 and the difference in infrared reflectance when SP-BK is used as the undercoat paint.
  • FIG. 9 is a graph plotting the film thickness of the top coat film obtained in Example 3 and the digital level that is the infrared reflection intensity measured by the apparatus 1 when SP-BK is used as the undercoat paint.
  • FIG. 10 is a graph plotting the film thickness of the top coat film obtained in Example 3 and the photodiode voltage as the infrared reflection intensity measured by the apparatus 2 when SP-BK is used as the undercoat paint. is there.
  • FIG. 11 is a graph plotting the relationship between the film thickness of the top coat film obtained in Comparative Example 1 and the difference in infrared reflectance.
  • FIG. 12 is a graph in which the film thickness of the top coat film obtained in Comparative Example 1 and the digital level that is the infrared reflection intensity measured by the apparatus 1 are plotted.
  • FIG. 13 is a graph plotting the relationship between the film thickness of the top coat film obtained in Comparative Example 2 and the difference in infrared reflectance.
  • FIG. 14 is a graph plotting the relationship between the film thickness of the top coat film obtained in Comparative Example 3 and the difference in infrared reflectance.
  • FIG. 15 is a graph plotting the relationship between the film thickness of the top coat film obtained in Comparative Example 4 and the difference in infrared reflectance.
  • FIG. 16 is a graph in which the film thickness of the top coat film obtained in Comparative Example 2 and the digital level that is the infrared reflection intensity measured by the apparatus 1 are plotted.
  • FIG. 17 is a graph in which the film thickness of the top coat film obtained in Comparative Example 3 and the digital level that is the infrared reflection intensity measured by the apparatus 1 are plotted.
  • FIG. 18 is a graph in which the film thickness of the top coat film obtained in Comparative Example 4 and the digital level that is the infrared reflection intensity measured by the apparatus 1 are plotted.
  • the coating composition according to the present invention forms a dry coating film (A) having a desired dry film thickness of 50 ⁇ m or more on the article (C) to be coated.
  • it is a coating composition for forming a wet coating film (A ′) having a desired wet film thickness of 50 ⁇ m or more, and satisfies the following requirements (I) and (II) or (i) and (ii): It is a coating composition capable of measuring a dry film thickness or a wet film thickness depending on strength.
  • the infrared transmittance of the dried coating film (A) is 2% or more.
  • the infrared reflectance of the article (C) to be coated (the side on which the dried coating film (A) of the article (C) is formed) Infrared reflectance measured from (same below) Measured from the side of the laminate comprising Rc% and the article (C) to be coated and the dried coating film (A) on which the dried coating film (A) was laminated.
  • the absolute value of the difference from the infrared reflectance Ra% is 2% or more.
  • the infrared transmittance of the dried coating film (A) obtained by drying the wet coating film (A ′) is 2% or more.
  • the dry coating film refers to a coating film obtained by applying a coating to an object and passing through a drying process.
  • the volatile component (solvent amount) in the coating film is 10 This refers to a coating film having a weight% or less.
  • the wet coating film refers to a coating film other than the dry coating film formed on the object to be coated.
  • the term “coating film” is simply used to include a dry coating film and a wet coating film.
  • the dry coating film obtained by drying the wet coating film (A ′) having the desired wet film thickness is not particularly limited as long as it is a coating film obtained from the wet coating film (A ′) through a drying step, but usually Since the dry coating film obtained by drying the wet coating film (A ′) is a dry coating film (A) having a desired dry film thickness, it is described as “dry coating film (A)” for convenience.
  • the desired dry film thickness is not particularly limited as long as it is 50 ⁇ m or more, and may be appropriately selected according to the desired use, but is preferably 100 to 1000 ⁇ m, more preferably 100 to 600 ⁇ m. Further, the desired wet film thickness is not particularly limited as long as it is 50 ⁇ m or more, and may be appropriately selected according to the desired application. However, the film thickness after drying the wet coating film falls within the above range. It is preferable that the film thickness is large.
  • the film thickness of such a wet coating film is preferably 110 to 2000 ⁇ m, more preferably 110 to 800 ⁇ m.
  • Infrared transmittance in the (I) and (i) is 2% or more, preferably 10% or more.
  • the absolute value of the difference between Ra and Rc in (II) and (ii) is 2% or more, preferably 3% or more.
  • the wavelength range of infrared rays and infrared rays used for measurement of Ra and Rc is preferably 800 nm to 1000 ⁇ m.
  • the coating film thickness can be measured by infrared reflection intensity, Become.
  • the graph which plotted the relationship between a film thickness and infrared reflected intensity turns into a graph which has a moderate inclination by using the coating composition which satisfy
  • the coating composition satisfying the above (I) and (II) or (i) and (ii) there is almost no influence by the solvent, and the film thickness can be controlled in a wet state.
  • the infrared transmittance and infrared reflectance can be specifically measured by the methods described in the following examples.
  • the coating composition of the present invention is a coating composition capable of measuring the film thickness of the coating film by infrared reflection intensity
  • the hue of the coating composition and the coating film obtained from the composition are not limited.
  • the infrared wavelength region is about 800 nm to 1000 ⁇ m, and is independent of the wavelength at which we visually recognize the hue, about 380 to 780 nm. For example, it is a condition where the film thickness cannot be confirmed due to a change in hue. Even under conditions in which a black top coat is applied on a black undercoat, the film thickness can be accurately determined by infrared reflection intensity if the above requirements (I) and (II) or (i) and (ii) are satisfied. Can be measured.
  • the film thickness of the coating film obtained from the coating composition of the present invention is measured by infrared reflection intensity.
  • the film thickness of the coating film formed from the coating composition to be used, and the infrared reflection intensity at the film thickness (formed on the object to be coated) Irradiate infrared rays from the coating film side of the coated film, measure several reflection strengths), determine the relationship between the film thickness and infrared reflection strength (curve graph) in advance, and based on this relationship
  • a method of measuring (deriving) the current thickness of the coating film from the infrared reflection intensity measured during actual coating is preferable.
  • the thickness of the coating film during coating can be easily measured.
  • a dry coating film as well as a wet coating film can be used. It is possible to measure a film thickness close to the actual film thickness that is about the same as the film thickness measured with a gauge or the like. Further, since the film thickness is measured by the infrared reflection intensity, the film thickness can be measured by a non-contact method even under dark conditions (for example, an environment of less than 20 lux).
  • Such infrared reflection intensity can be measured using a conventionally known apparatus such as an ultraviolet-visible-near-infrared spectrophotometer, etc., but is reflected when a light source capable of irradiating infrared rays and the object to be coated are irradiated with infrared rays. It is preferable to measure using an infrared reflection intensity measuring device including a sensor for detecting infrared intensity and a device for analyzing the infrared reflection intensity detected by the sensor.
  • an infrared reflection intensity measuring device using infrared rays having one or two or more wavelengths selected from the near infrared region is preferable because it is hardly affected by the temperature near room temperature and has good sensitivity.
  • the light source may be arbitrarily selected as long as it is capable of emitting infrared rays, and examples thereof include a halogen lamp, a reflight for photographing, LED, laser light, and sunlight.
  • any sensor having sensitivity in the infrared region can be arbitrarily selected.
  • the apparatus for analyzing the intensity of infrared reflection detected by the sensor can be arbitrarily selected, and examples thereof include an analysis program (such as Altair (manufacturer: FLIR Systems, Inc.)), an oscilloscope, and a voltmeter.
  • an analysis program such as Altair (manufacturer: FLIR Systems, Inc.)
  • an oscilloscope such as a voltmeter.
  • the infrared reflection intensity measuring apparatus 1 and the infrared reflection intensity measuring apparatus 2 used in the following examples are preferable.
  • the coating composition is not particularly limited as long as the composition satisfies the requirements (I) and (II) or (i) and (ii).
  • the infrared reflection intensity measured by the infrared reflection intensity measuring device is most dependent on the type and amount of pigment.
  • the coating composition contains an infrared reflective pigment as this pigment, a coating composition that satisfies the requirements (I) and (II) or (i) and (ii) can be easily obtained. Use is preferable because the degree of freedom in blending other components is increased.
  • the coating composition containing the infrared reflective pigment the film thickness of the dry coating film derived from the infrared reflection intensity of the coating film in the wet state immediately after coating is the film thickness of the actually obtained dry coating film. It is preferable because the value is very close to.
  • the term “infrared reflective pigment” refers to a pigment in the solid content of a paint on a coating film formed by applying and drying an undercoat paint SP-BK of Table 1 below to a dry film thickness of about 10 ⁇ m.
  • an overcoating film is formed by applying a topcoating material containing a pigment in such an amount that the content is 0.6% by volume and drying at 60 ° C. for 24 hours, the infrared of the topcoating film at a film thickness of 400 ⁇ m is formed.
  • This refers to a pigment having a reflectance of 15% or more, and the pigment is preferably a pigment having an infrared reflectance of 15 to 60%.
  • the infrared reflectance of the top coat film at a film thickness of 400 ⁇ m is determined by the method described in the Examples below.
  • the infrared reflective pigment is not particularly limited, but for example, titanium dioxide, cuprous oxide, zinc oxide, petrol, yellow petrol, chrome green black hematite, manganese bismuth black pigment, chromium iron oxide, nickel antimony titanium yellow rutile. , Chromium antimony titanium baflutyl and rutile tin zinc.
  • infrared reflective pigments include “Titone R-5N” (trade name) (manufactured by Sakai Chemical Industry Co., Ltd., titanium dioxide), “Taipeke R-930” (trade name) (manufactured by Ishihara Sangyo Co., Ltd.) ), “Gekkou BB” (trade name) (manufactured by Toda Pigment Co., Ltd., ferric oxide (valve)), “NC-301” (trade name) (Nisshin Chemco Co., Ltd., cuprous oxide), “Zinc Oxide 3 types” (trade name) (Kyushu Hakusui Co., Ltd., Zinc Oxide), “Valent 404” (Morishita Bengal Kogyo Co., Ltd., ferric oxide), “TAROX LL-XLO” ( (Trade name) (made by Titanium Industry Co., Ltd., yellow synthetic iron oxide ( ⁇ -iron oxyhydroxide)), “Black 10C909
  • Nganbismuth black pigment “Black 411A” (trade name) (Shepherd® Color® Company, chromium iron oxide), “Yellow 10C112” (trade name) (Shepherd® Color® Company, nickel anti-montitanium yellow rutile), “Yellow 10C242” (Product name) (Shepherd® Color® Company, Chrome Antimony Titanium Baffle), “Orange 10P320” (Shepherd® Color® Company, Rutile Tin Zinc), and the like.
  • the blending amount of the infrared reflecting pigment is too small, particularly less than 0.03% by volume, the change in the reflectance of light in the infrared region is small even when the film thickness is increased, so that the coating composition has sufficient sensitivity. In some cases, a coating film cannot be obtained. On the contrary, when the amount of the infrared reflecting pigment is too large, the light transmittance in the infrared region is reduced, so that it is difficult for infrared rays to reach the deep part of the coating film, particularly 3.0% by volume. If it exceeds, it tends to be difficult to measure the thickness of a thick film exceeding 50 ⁇ m.
  • the infrared reflective pigments may be used alone or in combination of two or more. When using 2 or more types, it is preferable to make the total compounding quantity of these several types of infrared reflective pigments become the range of the said compounding quantity.
  • infrared reflective pigments particularly when an infrared reflective pigment having a high reflectance in the infrared region and a low transmittance, for example, titanium dioxide, a petiole, a yellow petiole, etc., is blended (I) or ( In order to obtain a coating film that satisfies i), for example, when titanium dioxide is used, it is desirable to blend so as not to exceed 2.0% by volume in the dry coating film.
  • known components used in conventional coatings can be blended within a range that does not impair the effects of the present invention.
  • These components to be blended specifically solvents, resins, additives and the like, can be arbitrarily selected because they have less influence on the infrared transmittance and reflectance of the resulting coating film than pigment components. .
  • Binder resin The coating composition of the present invention usually contains a binder resin.
  • a binder resin is not particularly limited, and examples thereof include an epoxy resin, a urethane resin, an alkyd resin, an acrylic resin, a vinyl chloride resin, a chlorinated olefin resin, a chlorinated rubber, and a vinyl acetate resin.
  • an epoxy resin is particularly preferable.
  • the binder resin can be used alone or in combination of two or more.
  • the epoxy resin is not particularly limited, and examples thereof include non-tar epoxy resins described in JP-A-11-343454 and JP-A-10-259351.
  • the epoxy resin examples include a polymer or oligomer containing two or more epoxy groups in the molecule, and a polymer or oligomer generated by a ring-opening reaction of the epoxy group.
  • examples of such epoxy resins include bisphenol type epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, phenol novolac type epoxy resins, cresol type epoxy resins, dimer acid-modified epoxy resins, aliphatic epoxy resins, and alicyclic groups.
  • An epoxy resin, an epoxidized oil type epoxy resin, etc. are mentioned.
  • the epoxy resin may be synthesized by a conventionally known method or may be a commercially available product.
  • As a commercially available product “E028” (manufactured by Akira Ohtake Shin Chemical Co., Ltd., bisphenol A diglycidyl ether resin, epoxy equivalent of 180 to 190, viscosity of 12,000 to 15,000 mPa ⁇ s / 25 as a liquid at room temperature.
  • JER1001 Mitsubishi Chemical Corporation, bisphenol A type epoxy resin, epoxy equivalent 450-500
  • E-001-75X Otake Akira Shin Chemical Co., Ltd., bisphenol
  • epoxy resin 1001 manufactured by Akira Otake Shin Chemical Co., Ltd., bisphenol A type solid epoxy resin
  • the epoxy resin can be used alone or in combination of two or more.
  • the epoxy resin is preferably liquid or semi-solid at room temperature (temperature of 15 to 25 ° C., the same shall apply hereinafter) from the viewpoint of obtaining a composition having excellent adhesion to the substrate.
  • the epoxy equivalent of the epoxy resin is preferably 150 to 1000, more preferably 150 to 600, and particularly preferably 180 to 500 from the viewpoint of corrosion resistance and the like.
  • the weight average molecular weight measured by GPC gel permeation chromatograph of the epoxy resin is not generally determined depending on the coating curing conditions (eg, normal dry coating or baking coating) of the resulting composition, but preferably Is 350 to 20,000.
  • the binder resin is contained in the coating composition of the present invention in an amount of preferably 5 to 70% by weight, more preferably 10 to 30% by weight.
  • the binder resin when the coating composition of the present invention is a two-component composition comprising a main component and a curing agent component, the binder resin is included in the main component, and preferably in the main component. Is preferably contained in an amount of 5 to 80% by weight, more preferably 5 to 50% by weight.
  • the coating composition of the present invention may contain a curing agent. Although it does not restrict
  • an isocyanate compound may be used as the curing agent in order to obtain a urethane resin.
  • the epoxy resin curing agent is not particularly limited, and examples thereof include amine curing agents and acid anhydride curing agents. Among them, aliphatic, alicyclic, aromatic, heterocyclic, etc. The amine curing agent is preferred.
  • amines (amine compounds) described in JP-B-49-48480 can be used, and diethylaminopropylamine, polyether diamine, and the like can also be used.
  • amine curing agent examples include a modified product of the above-described amine curing agent, such as polyamide, polyamide amine (polyamide resin), amine adduct with an epoxy compound, Mannich compound (eg, Mannich modified polyamide amine), and Michael adduct. , Ketimine, aldimine, phenalkamine and the like.
  • the active hydrogen equivalent of the amine curing agent is preferably 50 to 1000, more preferably 80 to 400, from the viewpoint of obtaining a coating film having excellent anticorrosion properties.
  • Examples of the acid anhydride curing agent include phthalic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, 3,6-endomethylenetetrahydrophthalic anhydride, hexachloroendomethylenetetrahydrophthalic anhydride, methyl-3,6- Examples include endomethylenetetrahydrophthalic anhydride.
  • the curing agent may be synthesized by a conventionally known method or may be a commercially available product.
  • commercially available products include aliphatic polyamines “ACI Hardener K-39” (manufactured by PTI Japan), polyamidoamines “PA-66”, “PA-23” and “PA-290 (A ”” (Both manufactured by Otake Akira Shin Chemical Co., Ltd.), modified polyamine “MAD-204 (A)” (produced by Otake Akira Shin Chemical Co., Ltd.), Mannich modified polyamidoamine “Adeka Hardener EH- 342W3 "(manufactured by ADEKA Co., Ltd.),” Sanmide CX-1154 "(manufactured by Sanwa Chemical Co., Ltd.), a Mannich-modified aliphatic polyamine, and" Cardlight NC556X80 "(manufactured by Cardlight), a phenorcamine adduct. Is mentioned.
  • the curing agent can be used alone or in combination of two or more.
  • the equivalent ratio of the curing agent and the epoxy resin is preferably 0.3. It is desirable to use it in such an amount that it is ⁇ 1.5, more preferably 0.5 ⁇ 1.0.
  • Pigment A pigment (however, excluding the infrared reflection pigment) may be blended in the coating composition of the present invention.
  • pigments include conventionally known pigments, such as those described in “Paint Raw Material Handbook 9th Edition” (published by the Japan Paint Manufacturers Association) and “Organic Pigment Handbook” (Color Office, written by Isao Hashimoto). Pigments can be used.
  • the pigment (C) can be used alone or in combination of two or more.
  • the blending amount of the pigment is preferably 0.03 to 80 parts by weight, more preferably 100 parts by weight of the nonvolatile content of the coating composition of the present invention. Is 5 to 70 parts by weight.
  • the pigment include, for example, MIO (Micaceous Iron Oxide), aniline black, channel black, furnace black, conductive carbon black, carbon black, graphite, black petrol, composite metal oxide, Perylene black, N, N'-bis (2-phenylethyl) -3,4,9,10-perylenebiscarbodiimide, Victoria Pure Blue B0 Lake, Phthalocyanine Blue R, Phthalocyanine Blue G, Phthalocyanine Blue E, Metal-free Phthalocyanine Blue , First Sky Blue, Bituminous Blue, Cobalt Blue, Ultramarine Blue, Indantron Blue 3R, Decachlorinated, Condensed Azo Brown, Benzimidazolone Brown HR, Phthalocyanine Green, Chrome Green , Chromium oxide green, phthalocyanine green 6Y, aluminum, al paste gold color, al paste (non-leafing), al paste (leafing), zinc powder, dinitroaniline orange, pyrazolone orange, dianididine orange,
  • a pigment having a high light transmittance in the infrared region and a low reflectance for example, a pigment belonging to a low reflection pigment such as talc or barium sulfate, is used as the pigment in the coating composition of the present invention. Since the coating film to be formed has a tendency that the infrared reflectance hardly increases even when the film thickness is increased, it may be difficult to obtain a coating composition in which the coating film thickness can be easily measured by the infrared reflection intensity. Therefore, when using a pigment having a high light transmittance in these infrared regions and a low reflectance, it is preferable to use at least one pigment selected from the infrared reflective pigments in combination.
  • (D) Plasticizer It is also preferable to mix
  • the said plasticizer may be used individually by 1 type, and may use 2 or more types.
  • liquid hydrocarbons such as low-boiling fractions obtained by thermal decomposition of chlorinated paraffin (CERECOLOR S52, etc.), tricresyl phosphate, dioctyl phthalate, and naphtha.
  • resins include resins, petroleum resins that are solid at room temperature, xylene resins, and coumarone indene resins.
  • Specific examples include liquid hydrocarbon resins and flexibility imparting resins described in JP-A-2006-342360.
  • liquid hydrocarbon resins and hydroxyl-containing solid petroleum resins, xylene resins and coumarone indene resins are preferred from the viewpoint of good compatibility with epoxy resins.
  • liquid hydrocarbon resins include “Nesiles EPX-L”, “Nesiles EPX-L2” (hereinafter, NEVCIN / phenol-modified hydrocarbon resin), “HIRENOL PL-1000S” (manufactured by KOLON Chemical / Liquid hydrocarbon resins) and petroleum-based resins that are solid at room temperature include “Neopolymer E-100”, “Neopolymer K-2”, “Neopolymer K3” (Shin Nippon Petrochemical Co., Ltd.) (Manufactured by C9 series hydrocarbon resin) and coumarone indene resin are commercially available as “NOVARES CA 100” (Rutgers Chemicals AG), and as xylene resin as “Nicanol Y-51” (Mitsubishi Gas Chemical ( Etc.).
  • the blending amount of the plasticizer is determined from the viewpoint that a coating film having excellent weather resistance and crack resistance is obtained.
  • the amount is preferably 1 to 50 parts by weight, more preferably 3 to 30 parts by weight with respect to 100 parts by weight.
  • (E) Curing accelerator It is also preferable to mix
  • the curing accelerator include tertiary amines.
  • the said hardening accelerator may be used individually by 1 type, and may use 2 or more types.
  • curing accelerator examples include triethanolamine, dialkylaminoethanol, triethylenediamine [1,4-diazacyclo (2,2,2) octane], 2,4,6-tri (dimethylaminomethyl) phenol (example: The product name “Versamine EH30” (manufactured by Henkel Hakusui Co., Ltd.) and the product name “Ankamin K-54” (manufactured by Air Products Japan Co., Ltd.) can be mentioned. These curing accelerators are preferably blended in the coating composition of the present invention in an amount of 0.05 to 2.0% by weight.
  • (F) Solvent It is preferable to mix
  • the solvent is not particularly limited, and a conventionally known solvent can be used.
  • a conventionally known solvent can be used.
  • the said solvent may be used individually by 1 type, and may use 2 or more types.
  • the blending amount of the solvent is not particularly limited, and may be appropriately adjusted according to the coating method when the coating composition of the present invention is applied.
  • the non-volatile content of the coating composition of the present invention is contained in an amount such that it is preferably 10 to 98% by weight, more preferably 65 to 95% by weight. It is desirable.
  • the solvent preferably has a non-volatile concentration of the coating composition of the present invention of 20 to 95% by weight, more preferably from the viewpoint of paintability and the like. Is preferably contained in an amount of 65 to 90% by weight.
  • an additive (G) may be added to the coating composition of the present invention.
  • a conventionally well-known thing can be used as an additive (G).
  • the anti-sagging / sedimentation agent, silane coupling agent, and antifoaming agent include, but are not limited to.
  • the additive (G) can be used alone or in combination of two or more.
  • An anti-sagging / anti-settling agent imparts thixotropy to the coating composition of the present invention, and can improve the adhesion of the composition to an object to be coated.
  • the anti-sagging / precipitating agent is not particularly limited, and examples thereof include organic thixotropic agents and inorganic thixotropic agents.
  • the said anti-sagging and anti-settling agent may be used alone or in combination of two or more.
  • organic thixotropic agent examples include amide wax, hydrogenated castor oil type, polyethylene oxide type, vegetable oil polymerized oil type, surfactant type thixotropic agent, or a thixotropic agent using two or more of these in combination. Can be mentioned.
  • anti-sagging agents and anti-settling agents have been used in the past, and various compounds are known. It is preferable to use an amide wax from the viewpoint of being present.
  • the amide wax is not particularly limited, and examples thereof include amide wax synthesized from vegetable oil fatty acid and amine. Such an amide wax may be obtained by synthesis by a conventionally known method or may be a commercially available product. Examples of commercially available products include “Disparon A630-20X” and “Dispalon 6650” manufactured by Enomoto Kasei Co., Ltd., “ASA T-250F” manufactured by Ito Oil Co., Ltd., and the like.
  • Examples of the inorganic thixotropic agent include finely divided silica (usually, when measured by a scanning electron microscope observation method, the average particle diameter of primary particles is 40 nm or less, and the specific surface area is measured by the BET method. 50-410 m 2 / g silica), bentonite, silica treated with a silane compound, etc., bentonite treated with a quaternary ammonium salt (organic bentonite), ultrafine surface treated calcium carbonate, or , And mixtures thereof.
  • finely divided silica usually, when measured by a scanning electron microscope observation method, the average particle diameter of primary particles is 40 nm or less, and the specific surface area is measured by the BET method. 50-410 m 2 / g silica
  • bentonite silica treated with a silane compound, etc.
  • bentonite treated with a quaternary ammonium salt organic bentonite
  • ultrafine surface treated calcium carbonate or , And mixtures thereof
  • silica fine powder pulverized by a dry method for example, product name: Aerosil 300 manufactured by Nippon Aerosil Co., Ltd.
  • silica fine powder was modified with hexamethyldisilazane.
  • Fine powder for example, Nippon Aerosil Co., Ltd., trade name: Aerosil RX300
  • fine powder obtained by modifying silica fine powder with polydimethylsiloxane for example, Nippon Aerosil Co., Ltd., trade name: Aerosil RY300
  • fine powder silica Hydrophobic finely divided silica trade name: Aerosil R972, manufactured by Nippon Aerosil Co., Ltd.
  • organic bentonite trade name: Benton SD-2, manufactured by Elementis Specialties, Inc.
  • the surface is treated with silica treated with a silane compound or the like, a quaternary ammonium salt, or the like from the viewpoint of obtaining a coating composition having excellent adhesion to an object to be coated. It is preferable to use a bentonite treated with.
  • the anti-sag / anti-settling agent is obtained from the viewpoint of obtaining a composition having excellent coating viscosity, coating workability, and storage stability.
  • the blending amount (solid content) is preferably 0.1 to 5 parts by weight, more preferably 0.3 to 2 parts by weight with respect to 100 parts by weight of the nonvolatile content of the coating composition of the present invention.
  • the coating composition of the present invention preferably contains a silane coupling agent.
  • the said silane coupling agent may be used individually by 1 type, and may use 2 or more types.
  • the silane coupling agent is not particularly limited and conventionally known ones can be used.
  • the silane coupling agent has at least two functional groups in the same molecule, improves adhesion to the object to be coated, and increases the viscosity of the coating composition.
  • the compound can contribute to reduction, etc., and is represented by the formula: X—Si (OR) 3 [X is a functional group capable of reacting with an organic substance (eg, amino group, vinyl group, epoxy group, mercapto group, isocyanate) A methacryl group, a ureido group, a sulfur group or a hydrocarbon group containing these groups, etc.
  • an ether bond or the like may be present in this hydrocarbon group) or an alkyl group, and OR represents , A hydrolyzable group (eg, methoxy group, ethoxy group). It is more preferable that it is a compound represented by this.
  • preferable silane coupling agents include “KBM403” ( ⁇ -glycidoxypropyltrimethoxysilane, manufactured by Shin-Etsu Chemical Co., Ltd.), “Syra Ace S-510” (manufactured by JNC Corporation), and the like. Is mentioned.
  • the amount of the silane coupling agent is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the coating composition of the present invention. More preferably, it is 0.3 to 5 parts by weight.
  • the coating performance such as adhesion to the substrate is improved, and the viscosity of the coating composition of the present invention can be lowered. Will improve.
  • the article to be coated (C) it can be used without particular limitation as long as it is a subject of painting, but is preferably an article that satisfies the above (II) and (ii).
  • the article to be coated (C) may be a place where it is desired to paint, and the composition of the top coat is usually adjusted so as to satisfy the above (II) and (ii). Since the coating composition of the present invention satisfies the requirement (II) or (ii), it is not limited by the properties of the surface of the object to be coated, and the film thickness of the coating film can be easily measured.
  • Examples of the article to be coated (C) include ships, marine structures, bridges, buildings, plant equipment, steel structures, concrete structures, and transportation machines such as automobiles. Moreover, as a material of to-be-coated article (C), a metal, wood, a synthetic resin, a natural resin, concrete etc. are mentioned, for example.
  • the article to be coated (C) may be the structure as it is (the surface thereof is untreated), or a coating film, rust, oil or fat, moisture, which may be present on the surface of the structure, Dust, slime, salt, etc. may be partially or completely cleaned and removed, or a coating film formed from a paint such as an undercoat paint (anticorrosion paint, etc.) on the surface of the structure. It may be present.
  • the undercoat paint a known paint can be appropriately changed according to the material and use of the substrate.
  • Specific examples of the undercoat paint include shop primers and anticorrosion paints.
  • the method for forming a coating film according to the present invention is a method for forming the dried coating film (A) on the article (C) to be coated, After coating the coating composition of the present invention satisfying the requirements (I) and (II) on the article (C) to be coated and drying, It is performed by determining whether or not the dry coating film has reached a desired film thickness by measuring the infrared reflection intensity with an infrared reflection intensity measuring device, or It is a method of forming the wet paint film (A ′) on the article to be coated (C), Applying the coating composition of the present invention satisfying the requirements (i) and (ii) on the article to be coated (C), It is performed by determining whether the wet coating film has reached a desired film thickness by measuring the infrared reflection intensity with an infrared reflection intensity measuring device.
  • the method for determining whether the dry coating film or the wet coating film has reached a desired film thickness by measuring the infrared reflection intensity is not particularly limited, but ⁇ the film thickness of the coating film by the infrared reflection intensity
  • the method specifically described in the section of “Method for Measuring Measure >> is preferred.
  • the method for applying the coating composition of the present invention on the article to be coated is not particularly limited, and a conventionally known method may be appropriately selected according to the desired article to be coated and the place of coating. For example, when painting on a large structure such as a ship, spray painting is employed. Further, the method for drying the applied coating composition is not particularly limited, and may be appropriately selected depending on the desired application and the coating composition to be used. For example, the drying temperature is about 10 to 40 ° C. The drying time is about 6 hours to 1 week. As drying conditions in winter, the drying temperature may be about ⁇ 5 to 10 ° C., and the drying time may be about 16 hours to 2 weeks.
  • composition of the undercoat used in the following tests is shown in Table 1, and the composition of the topcoat and the test results are shown in Tables 2 to 4. Details of the raw materials in Table 1 and Tables 2 to 4 are shown in Table 5.
  • the undercoat paint is a paint obtained by mixing each component with the composition shown in Table 1.
  • the top coating composition is prepared by mixing each material with the composition shown in Tables 2 to 4 to prepare the main component and the curing agent component, and mixing the obtained main component and the curing agent component immediately before use. It is the paint obtained in.
  • 400 ⁇ m equivalent reflectance in Table 5 refers to the infrared reflectance of the top coat film at a film thickness of 400 ⁇ m measured by the following method.
  • a test plate material: JIS G3101 SS-400
  • SP-BK black
  • Table 1 the undercoat paint SP-BK (black) in Table 1 so that the dry film thickness is about 10 ⁇ m and dried.
  • a top coating was applied using a BYK Gardner multi-applicator and dried at 60 ° C. for 24 hours.
  • the gap between the applicators was adjusted as appropriate (for example, 15 Mil or 30 Mil) to prepare test plates each having a dry coating film thickness of less than 400 ⁇ m or a top coating film of 400 ⁇ m or more.
  • the components and contents other than the pigment used in the top coat were in accordance with Table 2 top coat TC-1 (however, the content of the pigment in the solid content of the paint is 0.6% by volume).
  • the top coat TC-1 in Table 2 was used.
  • the film thicknesses of the top coat film on the two obtained test plates were measured with an electromagnetic film thickness meter (Kett LZ-990).
  • an ultraviolet-visible near-infrared spectrophotometer manufactured by Shimadzu Corporation, Solid Spec-3700, the same applies below was applied from the top coat film side of the obtained laminate. Infrared reflectivity was measured using this. Specifically, the wavelength range of 300 to 2600 nm was measured with a resolution of 1 nm, and the average value of reflectance at wavelengths of 900 to 1700 nm was taken as infrared reflectance. From the relationship (linear function) between the infrared reflectance and film thickness obtained using the two test plates, the infrared reflectance of the top coat film at a film thickness of 400 ⁇ m was determined.
  • the infrared transmittance of the top coat obtained from the top coat described in Tables 2 to 4 below was measured with an ultraviolet-visible near-infrared spectrophotometer. Specifically, the wavelength range of 300 to 2600 nm was measured with a resolution of 1 nm, and the infrared transmittance of the top coat film was measured in the infrared wavelength range of 900 to 1700 nm. The following infrared reflectance was also measured under the same apparatus and conditions.
  • the coating film used for infrared transmittance measurement was prepared as follows. Using a BYK Gardner multi-applicator, the top coating of Tables 2 to 4 was applied onto the silica paper. At this time, the gap of the applicator was set to 15 Mil or the gap of 30 Mil to form two types of wet coating films. The obtained wet coating film was dried at 60 ° C. for 24 hours, and then peeled off from the recycled paper to form a coating film (top coating film).
  • the film thickness of the top coat film was measured with a micrometer (MDC-25MJ, manufactured by Mitutoyo Corporation).
  • the film thickness of the obtained top coat film was less than 400 ⁇ m and 400 ⁇ m or more. It should be noted that, based on the Lambert-Beer law, the log transmittance and the film thickness are linearly related, and from the linear expression of the film thickness and log transmittance of the two types of coating films obtained, the coating at a film thickness of 400 ⁇ m is obtained.
  • the infrared transmittance of the film was defined as the infrared transmittance.
  • the film thickness of this laminate was measured with an electromagnetic film thickness meter (LZ-990), and the film thickness of the top coat film was calculated by subtracting the film thickness of the undercoat film from that value.
  • the infrared reflectance was measured with the ultraviolet visible near-infrared spectrophotometer from the side by which the top coat film was laminated
  • the dry film thickness of the top coat film is 400 ⁇ m or more, and the laminate including the coat film closest to 400 ⁇ m, and the dry film thickness of the top coat film is less than 400 ⁇ m, and
  • the relationship between the reflectance and the film thickness of the top coat film is obtained as a linear function for the laminate including the coating film closest to 400 ⁇ m, and the infrared reflectance at this film thickness of 400 ⁇ m is determined as the infrared reflectance Ra (% ).
  • the values of infrared reflectance Ra (%) in Tables 2 to 4 are the values of infrared reflectance Ra (%) at a film thickness of 400 ⁇ m.
  • the absolute value of the difference between the infrared reflectance of the object to be coated and the infrared reflectance measured from the side of the laminate comprising the object to be coated and the topcoat film, on which the topcoat film is laminated Calculated from Ra and Rc.
  • the film thickness and the difference in infrared reflectance show a positive correlation, it is considered that the film thickness can be measured within the range of film thickness indicating this relationship.
  • Undercoat paints of Tables 2 to 4 were applied onto a steel plate in the same manner as in the above ⁇ Method for measuring infrared reflectance of article to be coated> and dried to form an undercoat paint film.
  • a top coat of Tables 2 to 4 on the undercoat film of this steel sheet with a base coat film and using a multi-applicator manufactured by BYK Gardner and drying at room temperature for 1 week, the steel sheet with the top coat film and the base coat film is coated.
  • a plurality of steel sheets with topcoat and undercoat films different in thickness of the topcoat film were obtained (hereinafter also referred to as “test plates”).
  • the film thickness of the top coating film of each of the obtained test plates was measured with an electromagnetic film thickness meter (LZ-990), and then the infrared reflection intensity measured from the top coating film side of the test plate was measured using the apparatus 1 And measured.
  • the film thickness of the top coating film measured with an electromagnetic film thickness meter is plotted on the horizontal axis of the graph, and the energy level (digital level), which is the infrared reflection intensity detected by the apparatus 1, is plotted on the vertical axis of the graph. Whether the film thickness of a 1000 ⁇ m coating film can be measured was evaluated according to the following evaluation criteria.
  • LED / KEDE1452H (2.8 mW, emission wavelength 1200 to 1600 nm) manufactured by Kyosemi Co., Ltd. as a light source capable of irradiating infrared rays, and detecting the reflected light intensity in the infrared region reflected when irradiating the object with infrared rays.
  • a long wavelength InGaAs photodiode KPDE086S detection wavelength 900-1700 nm
  • a reflection intensity measuring device 2 (hereinafter also referred to as “device 2”) was prepared.
  • the thickness of the top coat film on the test plate was measured in the same manner as the measurement of the infrared reflection intensity using the device 1 except that the infrared reflection strength of the test plate was measured by the device 2 instead of the device 1.
  • the infrared reflection intensity measured from the top coating film side of the test plate was measured.
  • the film thickness of the top coating film measured with an electromagnetic film thickness meter is plotted on the horizontal axis of the graph, and the photodiode voltage, which is the infrared reflection intensity detected by the device 2, is plotted on the vertical axis of the graph. Whether the film thickness can be measured was evaluated according to the following evaluation criteria.
  • the film thickness and the infrared reflection intensity obtained by the apparatus 1 or 2 show a positive correlation, it is considered that the film thickness can be measured in the film thickness in the range showing this relationship.
  • Example 1 F-5 was used as the top coat and SP-BK was used as the base coat. Using these paints, ⁇ Measurement method of infrared reflectance of article to be coated>, ⁇ Measurement of infrared reflectance measured from the side of the laminate comprising the article to be coated and the coating film on which the coating film is laminated)
  • a graph plotting the relationship between the film thickness of the top coat obtained by the method described in ⁇ Method> and the difference in infrared reflectance (absolute value of the difference between Ra and Rc) is shown in FIG.
  • FIG. 3 shows a graph in which the photodiode voltage (unit: volt), which is the infrared reflection intensity, is plotted.
  • FIG. 2 and FIG. 3 show curves having almost the same shape, and the curves showed a positive correlation at least in the range of about 50 to 800 ⁇ m.
  • the topcoat film formed from the topcoat paint F-5 applied on the undercoat film formed from the undercoat paint SP-BK is obtained by the devices 1 and 2 which are non-contact type film thickness measuring devices using infrared rays.
  • the dry film thickness can be measured at least in the range of about 50 to 800 ⁇ m.
  • a coating film having a desired dry film thickness can be formed. Is possible.
  • the undercoat paint SP-BK was applied onto the steel plate in the same manner as described above and dried to form an undercoat paint film.
  • the top coat F-5 was spray-coated on the undercoat film of the steel sheet with the undercoat film, and the paint film was dried. This operation was performed until the infrared reflection intensity of the coating film obtained by drying reached a value corresponding to about 400 ⁇ m in FIG.
  • the dry film thickness of the laminate comprising the undercoat film film thickness of about 10 ⁇ m
  • the topcoat film was measured using an electromagnetic film thickness meter (LZ-990), and was about 410 ⁇ m. The same was true when the coating was performed until the value corresponding to about 400 ⁇ m in FIG.
  • the dry film thickness based on the infrared reflection intensity and the actually measured dry film thickness were approximately the same thickness.
  • the infrared transmittance of the dried coating film having a thickness of 400 ⁇ m, measured by the same method as described above, was 39.0%, and Ra-Rc was 22.3%.
  • the infrared reflection intensity reaches a value corresponding to about 50 ⁇ m or about 800 ⁇ m in FIG. 2 or FIG. 3, and the actual thickness of the obtained dry film thickness is measured with an electromagnetic film thickness meter (LZ-990). ),
  • the dry film thickness based on the infrared reflection intensity and the actually measured dry film thickness were substantially the same.
  • the infrared transmittance of the dry coating film having a film thickness of 50 ⁇ m measured by the same method as described above was 79.2%, Ra-Rc was 3.6%, and the dry coating film having a film thickness of 800 ⁇ m was used.
  • the infrared transmittance of the film was 17.3% and Ra-Rc was 29.9%.
  • the apparatus which is a non-contact type film thickness measuring device using infrared rays, is used for the top coat film formed from the top coat F-5 applied on the base coat formed from the base coat SP-BK. 1 and 2, it was found that the dry film thickness can be measured (determined) at least in the range of about 50 to 800 ⁇ m.
  • the lighting is repeatedly turned on and off, and the digital level is obtained under bright conditions (illuminance: 150 lux) and dark conditions (illuminance: 20 lux).
  • the film thickness can be measured under both the bright and dark conditions, and a coating film having a desired dry film thickness can be formed.
  • Undercoat paint SP-BK was applied onto a steel plate in the same manner as described above, and dried to form an undercoat paint film.
  • a steel plate with a wet top coat film was obtained by coating the top coat F-5 on the base coat film with this base coat film.
  • a plurality of steel sheets with wet top coat films having different wet top coat film thicknesses were obtained.
  • the film thickness of each wet top coat film of the obtained steel sheet was measured with a wet gauge (manufactured by Asahi Sunac Co., Ltd.), and then infrared reflection was performed from the wet top coat film side of the steel sheet using apparatus 1 or apparatus 2. The strength was measured.
  • FIG. 4 shows a graph in which the film thickness of the wet top coat film measured with the wet gauge and the digital level which is the infrared reflection intensity measured with the apparatus 1 are plotted.
  • the curve showed a positive correlation at least in the thickness range of about 50 to 1000 ⁇ m.
  • the wet topcoat film formed from the topcoat paint F-5 applied on the undercoat film formed from the undercoat paint SP-BK is applied to the apparatus 1 or 2 which is a non-contact type film thickness measuring device using infrared rays. It is possible to measure the wet film thickness at least in the range of about 50 to 1000 ⁇ m.
  • the infrared reflection intensity measured at the time of actual painting is the graph.
  • a coating film having a desired wet film thickness can be formed by terminating the coating when a predetermined value corresponding to the above desired wet film thickness is reached.
  • the film thickness of the dry coating film obtained from the wet coating film can be found even in the wet coating film state.
  • the relationship between the results based on the amount of solids contained in the coating composition and the film thickness of the dried coating film obtained from the wet coating film as measured with an electromagnetic film thickness meter was investigated. The values were almost consistent.
  • the film thickness of a predetermined dry coating film can be obtained by measuring the infrared reflection intensity in the state of the wet coating film during coating. It can be determined whether or not.
  • the undercoat paint SP-BK was applied onto the steel plate in the same manner as described above and dried to form an undercoat paint film.
  • the undercoat film F-5 is spray-coated on the undercoat film of the steel sheet with the undercoat film using the apparatus 1 while measuring the infrared reflection intensity, and the infrared reflection intensity has a value corresponding to about 460 ⁇ m in FIG.
  • I finished painting When finished, I finished painting.
  • the wet film thickness of the part where the coating was completed was measured with a wet gauge, the paint adhered to a peak of 450 ⁇ m. That is, the wet film thickness based on the infrared reflection intensity and the actually measured wet film thickness were substantially the same.
  • the infrared reflection intensity was measured using the apparatus 1 from the top coat film side of the sufficiently coated steel sheet with the top coat film. Based on FIG. 2, the infrared reflection intensity corresponds to a film thickness of 320 ⁇ m. I found out that Further, the film thickness of the laminate composed of the undercoat film (film thickness: about 10 ⁇ m) and the topcoat film was measured using an electromagnetic film thickness meter (LZ-990) to be 330 ⁇ m. That is, the dry film thickness based on the infrared reflection intensity and the actually measured dry film thickness were approximately the same thickness.
  • the top coating material F-5 has a solid content of about 70 vol%
  • the coating film having a wet film thickness of 460 ⁇ m obtained from the coating material is considered to have a dry film thickness of about 320 ⁇ m. Therefore, since the dry film thickness calculated from the wet film thickness based on the infrared reflection intensity based on the solid content of the paint and the actually measured dry film thickness are approximately the same, By applying the film while measuring the infrared reflection intensity of the film, a dry coating film having a predetermined film thickness can be obtained.
  • the top coat F-5 satisfies the requirements (i) and (ii) at least in the wet film thickness of 50 to 1000 ⁇ m. It was found that the top coating F-5 was a coating having almost no influence on the infrared reflection intensity by the solvent contained in the coating.
  • Example 1 the same evaluation as described above was performed using SP-GY, SP-LG, SP-BL, SP-BR, or SP-GN as an undercoat instead of SP-BK.
  • the results are shown in Table 2.
  • the same results as with the SP-BK are obtained, and the top coat film formed from the top coat F-5 is obtained by a non-contact type film thickness measuring device using infrared rays.
  • the apparatus 1 or 2 can measure the wet film thickness in the range of at least about 50 to 1000 ⁇ m and can measure the dry film thickness in the range of at least about 50 to 800 ⁇ m. It was possible.
  • Example 2 The test was conducted in the same manner as in Example 1 except that SP-BK was used as the undercoat and IR-U was used as the topcoat.
  • FIG. 5 is a graph plotting the relationship between the film thickness of the obtained top coat film and the difference in infrared reflectance, and the photodiode voltage, which is the film thickness of the obtained top coat film and the infrared reflection intensity measured by the apparatus 2. 6 was plotted in the same manner as in Example 1, and showed a positive correlation. Further, in Example 1, except that the apparatus 2 was used in place of the apparatus 1, the film thickness of the wet top coat film and the infrared reflection intensity measured by the apparatus 2 were measured in the same manner as in Example 1. A graph plotting the diode voltage is shown in FIG.
  • the top coat film formed from the top coat IR-U is at least about 50 to 1000 ⁇ m in thickness by the devices 1 and 2 which are non-contact type film thickness measuring devices using infrared rays.
  • the wet film thickness can be measured, and in the range of at least about 50 to 800 ⁇ m, the dry film thickness can be measured.
  • the infrared transmittance of the dried coating film having a film thickness of 50 ⁇ m, measured by the same method as described above, is 71.6%
  • Ra-Rc is 4.4%
  • the infrared transmittance of the film was 10.5%
  • Ra-Rc was 29.3%.
  • the undercoat paint SP-BK was applied onto the steel plate in the same manner as described above and dried to form an undercoat paint film.
  • the top coat IR-U is spray-coated on the undercoat film of the steel sheet with the undercoat film while measuring the infrared reflection intensity using the apparatus 2, and the infrared reflection intensity is a value corresponding to about 440 ⁇ m in FIG.
  • I finished painting When finished, I finished painting.
  • the wet film thickness of the part where the coating was completed was measured with a wet gauge, the paint adhered to the 400 ⁇ m peak. That is, the wet film thickness based on the infrared reflection intensity and the actually measured wet film thickness were substantially the same.
  • the infrared reflection intensity was measured using the apparatus 2 from the top coat film side of the sufficiently coated steel sheet with the top coat film. Based on FIG. 6, the infrared reflection intensity was about 320 ⁇ m. It turns out that it corresponds. Further, the film thickness of the laminate composed of the undercoat film (film thickness: about 10 ⁇ m) and the topcoat film was measured using an electromagnetic film thickness meter (LZ-990) to be 330 ⁇ m. That is, the dry film thickness based on the infrared reflection intensity and the actually measured dry film thickness were approximately the same thickness.
  • the top coating IR-U has a solid content of about 73 vol%, it is considered that the coating film having a wet film thickness of 440 ⁇ m obtained from the coating material has a dry film thickness of about 320 ⁇ m. Therefore, since the dry film thickness calculated from the wet film thickness based on the infrared reflection intensity based on the solid content of the paint and the actually measured dry film thickness are approximately the same, By applying the film while measuring the infrared reflection intensity of the film, a dry coating film having a predetermined film thickness can be obtained. As described above, the top coat IR-U satisfies the requirements (i) and (ii) at least in a wet film thickness of 50 to 1000 ⁇ m. Further, it was found that the top coating IR-U is a coating having almost no influence on the infrared reflection intensity by the solvent contained in the coating.
  • Examples 3 to 17 The test was performed in the same manner as in Examples 1 and 2 except that the paints in Tables 2 to 3 were used as the undercoat paint and the topcoat paint.
  • the graph which plotted the relationship between the film thickness of the obtained top coat film and the difference of infrared reflectance, and the digital level which is the film thickness of the obtained top coat film and the infrared reflection intensity measured with the apparatus 1 were plotted.
  • the graph and the graph plotting the film thickness of the obtained top coat film and the photodiode voltage, which is the infrared reflection intensity measured by the apparatus 2 have substantially the same shape as in Examples 1 and 2. A positive correlation was shown.
  • the top coating film formed from the top coating material used in each Example is a non-contact type film thickness measuring device using infrared rays.
  • the wet film thickness can be measured at least in the range of about 50 to 1000 ⁇ m, and the dry film thickness can be measured in the range of at least about 50 to 800 ⁇ m.
  • Example 1 The test was conducted in the same manner as in Example 1 except that SP-BK in Table 1 was used as the undercoat paint and F-6 in Table 4 was used as the topcoat paint. This paint F-6 did not satisfy the requirement (II) at a desired dry film thickness of 400 ⁇ m.
  • FIG. 11 A graph plotting the relationship between the film thickness of the obtained top coat film and the difference in infrared reflectance is shown in FIG. 11, and the digital level which is the film thickness of the obtained top coat film and the infrared reflection intensity measured by the apparatus 1
  • FIG. 12 shows a graph plotting the above.
  • FIG. 11 and FIG. 12 showed curves having substantially the same shape, but the infrared reflection intensity hardly changed with the change in the film thickness, so that the paint was applied on the undercoat film formed from the undercoat paint SP-BK.
  • the dry film thickness of the top coat film formed from the top coat F-6 was difficult to measure with the devices 1 and 2 which are non-contact type film thickness measuring devices using infrared rays.
  • Comparative Examples 2 to 4 The test was conducted in the same manner as in Comparative Example 1 except that the paints in Table 4 were used as the undercoat paint and the topcoat paint.
  • the top coat used in Comparative Examples 2 to 4 did not satisfy at least the requirement (II) at a desired dry film thickness of 400 ⁇ m.
  • Comparative Examples 2 to 4 the figures corresponding to FIG. 11 are shown as FIGS. 13 to 15, respectively, and the figures corresponding to FIG. 12 are shown as FIGS. 16 to 18, respectively. In each of Comparative Examples 2 to 4, these figures showed curves of almost the same shape. However, when the top coat of these comparative examples was used, a non-contact type film thickness measuring device using infrared rays It was difficult to measure the dry film thickness with the devices 1 and 2.

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Abstract

Cette invention concerne une composition de revêtement dont on peut mesurer une épaisseur de film sec ou une épaisseur de film humide à l'aide de l'intensité de réflexion de rayons infrarouges, et un procédé de formation d'un film de revêtement sec ou d'un film de revêtement humide. Cette composition de revêtement forme, sur un objet destiné à être revêtu (C), un film de revêtement sec (A) ayant une épaisseur de film sec recherchée ou un film de revêtement humide (A') ayant une épaisseur de film humide recherchée, lesdites épaisseurs recherchées n'étant pas inférieures à 50 µm, la composition de revêtement étant caractérisée en ce qu'un facteur de transmission des infrarouges du film de revêtement sec (A) ou du film de revêtement sec (A) obtenu après séchage du film de revêtement humide (A') n'est pas inférieur à 2 %, et en ce que la valeur absolue de la différence entre le taux de réflexion des infrarouges (% Rc) de l'objet destiné à être revêtu (C) et le taux de réflexion des infrarouges (% Ra) mesuré à partir d'un côté de stratifié portant le film de revêtement sec (A) stratifié sur sa surface n'est pas inférieure à 2 %, le stratifié comprenant l'objet qui doit être revêtu (C) et le film de revêtement sec (A).
PCT/JP2015/066373 2014-07-10 2015-06-05 Composition de revêtement et procédé de formation d'un film de revêtement WO2016006374A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
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CN105675526A (zh) * 2016-03-10 2016-06-15 福建中烟工业有限责任公司 用于检测造纸法再造烟叶产品涂布率的方法和装置
CN114112930A (zh) * 2020-08-26 2022-03-01 立邦涂料（中国）有限公司 涂料湿膜对比率的测试装置及测试方法
US11339829B2 (en) * 2018-06-08 2022-05-24 Mahle International Gmbh Sliding element comprising a pigment

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TW201934653A (zh) * 2018-01-12 2019-09-01 日商捷恩智股份有限公司 散熱構件用組成物、散熱構件、電子機器、散熱構件用組成物的製造方法
JP7346025B2 (ja) 2018-12-25 2023-09-19 キヤノン株式会社 ロボットシステム、ロボットシステムの制御方法、ロボットシステムを用いた物品の製造方法、送電モジュール、給電方法、無線給電モジュール、プログラム及び記録媒体
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JP2002080787A (ja) * 2000-09-06 2002-03-19 Nippon Paint Co Ltd 膜厚判定塗料組成物および複層塗膜形成方法
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WO2013006602A1 (fr) * 2011-07-07 2013-01-10 The Shepherd Color Company Pigments inorganiques de titanate à faible charge pour utilisation dans des couleurs réfléchissant l'infrarouge
WO2013020261A1 (fr) * 2011-08-05 2013-02-14 Construction Research & Technology Gmbh Système de revêtement étanche à l'eau pour réfléchir le rayonnement solaire et revêtement aqueux pour former une couche décorative et réfléchissante dans un système de revêtement

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JPS61172002A (ja) * 1985-01-25 1986-08-02 Nippon Steel Corp 赤外線式塗装膜厚み測定装置
JPH03295407A (ja) * 1990-04-13 1991-12-26 Kawasaki Steel Corp 導電性複合金属板の樹脂膜厚測定方法
JPH10216621A (ja) * 1996-10-31 1998-08-18 Nippon Paint Marine Kk 塗膜形成方法
JP2002066445A (ja) * 2000-09-01 2002-03-05 Nippon Paint Marine Kk 塗膜形成方法
JP2002080787A (ja) * 2000-09-06 2002-03-19 Nippon Paint Co Ltd 膜厚判定塗料組成物および複層塗膜形成方法
JP2011184638A (ja) * 2010-03-10 2011-09-22 Kictec Inc 遮熱性塗料組成物
WO2013006602A1 (fr) * 2011-07-07 2013-01-10 The Shepherd Color Company Pigments inorganiques de titanate à faible charge pour utilisation dans des couleurs réfléchissant l'infrarouge
WO2013020261A1 (fr) * 2011-08-05 2013-02-14 Construction Research & Technology Gmbh Système de revêtement étanche à l'eau pour réfléchir le rayonnement solaire et revêtement aqueux pour former une couche décorative et réfléchissante dans un système de revêtement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105675526A (zh) * 2016-03-10 2016-06-15 福建中烟工业有限责任公司 用于检测造纸法再造烟叶产品涂布率的方法和装置
CN105675526B (zh) * 2016-03-10 2018-07-31 福建中烟工业有限责任公司 用于检测造纸法再造烟叶产品涂布率的方法和装置
US11339829B2 (en) * 2018-06-08 2022-05-24 Mahle International Gmbh Sliding element comprising a pigment
CN114112930A (zh) * 2020-08-26 2022-03-01 立邦涂料（中国）有限公司 涂料湿膜对比率的测试装置及测试方法
CN114112930B (zh) * 2020-08-26 2023-06-27 立邦涂料（中国）有限公司 涂料湿膜对比率的测试装置及测试方法

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