WO2020209029A1 - Peinture de protection thermique - Google Patents

Peinture de protection thermique Download PDF

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Publication number
WO2020209029A1
WO2020209029A1 PCT/JP2020/012221 JP2020012221W WO2020209029A1 WO 2020209029 A1 WO2020209029 A1 WO 2020209029A1 JP 2020012221 W JP2020012221 W JP 2020012221W WO 2020209029 A1 WO2020209029 A1 WO 2020209029A1
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WO
WIPO (PCT)
Prior art keywords
pigment
color
titanium yellow
pigments
paint
Prior art date
Application number
PCT/JP2020/012221
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English (en)
Japanese (ja)
Inventor
荒井　稔
窪田　克則
Original Assignee
アライアンス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アライアンス株式会社 filed Critical アライアンス株式会社
Publication of WO2020209029A1 publication Critical patent/WO2020209029A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • 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
    • C09D7/41—Organic pigments; Organic dyes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic

Definitions

  • the present invention relates to a heat shield coating material.
  • the reflection of near-infrared light is due to the scattering phenomenon caused by the pigment in the dry coating film (hereinafter, simply referred to as the coating film) after the paint is applied.
  • the coating film For example, rutile-type titanium dioxide (hereinafter referred to as titanium oxide) is used. It is typically used as a white pigment because it absorbs less in the visible light region to the near infrared region and has high light scattering properties.
  • titanium oxide has a medium to low brightness of about 70 or less in the color space of L * a * b * defined by the CIE (International Commission on Illumination) for the coating film in order to whiten the color and increase the brightness.
  • CIE International Commission on Illumination
  • Patent Document 1 discloses a method of applying a coating film using a paint using a color pigment having high infrared transparency onto a coating film using titanium oxide.
  • Patent Document 2 by suppressing the whiteness of the coating film obtained by using a pigment having a particle size larger than that of general titanium oxide, the titanium oxide concentration is relatively increased even in a color having low lightness. As a result, a technique for improving near-infrared reflectivity with a single-layer coating film is disclosed.
  • Patent Document 1 requires two layers of a coating film, which increases the number of steps and the cost. Further, when the upper layer becomes thin due to deterioration of the coating film or trauma, the lower layer becomes transparent, and when even a part of the lower layer is exposed, the appearance deteriorates due to the difference in color between the two layers.
  • the difference in the concentration of titanium oxide due to the difference in particle size is not large, and a sufficient effect cannot be expected.
  • the present invention has been proposed in view of the above points, and an object of the present invention is that, on one side, a single-layer coating film has an L * value of 70 or less in the color space of L * a * b *.
  • the set value of the color of the dry coating film after the heat-shielding paint is applied is 0 or more in a * in the color space of L * a * b *, and ,
  • the heat-shielding paint used when b * is 0 or more, and the chrome titanium yellow pigment having an a * value of 19 or more in the color space of L * a * b * is different from the chrome titanium yellow pigment.
  • the content of the chromium titanium yellow pigment is 50% by mass or more with respect to the total pigment components, including other pigments, and among the other pigments, the pigments other than the composite oxide pigment and the titanium oxide pigment are contained. The amount is less than half of the content of the chromium titanium yellow pigment.
  • one layer of the coating film has high reflectance in the near infrared region even if the L * value in the color space of L * a * b * is 70 or less.
  • a thermal barrier coating can be provided.
  • titanium oxide whitens the color and increases the brightness. Therefore, when the coating film has a medium to low brightness of 70 or less in the color space of L * a * b * defined by the CIE, etc. It is necessary to reduce the compounding ratio of titanium oxide to the pigment of.
  • the present inventors use the color pigment if there is a color pigment having a scattering property in the near infrared region at the same level as titanium oxide.
  • a color pigment By using it as a base pigment and adjusting it with another pigment, it may be possible to increase the blending amount of the color pigment even when the L * value is 70 or less and the brightness is medium to low.
  • "using the color pigment as a base pigment and adjusting the color with another pigment” means that another pigment is added based on the color of the coating film made of a paint composed only of the chromium titanium yellow pigment. This means that the color is adjusted so as to achieve the desired color of the coating film.
  • titanium oxide is used as a base pigment to adjust the color in order to use as much titanium oxide as possible.
  • titanium oxide is achromatic and has high lightness, so it is suitable for low-brightness colors.
  • toning it is necessary to greatly reduce the amount.
  • a color pigment is used as a base pigment, if the color of the target coating film is higher than the paint coating film containing only the color pigment, titanium oxide may be blended, and conversely, if the brightness is low. Is sufficient to blend the pigment and a pigment exhibiting a complementary color of the color, so that the blending amount of the pigment can be increased even when the brightness is considerably low.
  • color pigments having high scattering properties in the near infrared region include composite oxide pigments.
  • composite oxide pigments a Ti-Cr-Sb-based composite oxide pigment in which a transition metal as a color-developing component is doped into the rutile structure of titanium oxide, which is an orange-colored chromium titanium yellow (CI Pigment). Brown 24) and nickel titanium yellow (CI Pigment Yellow 53), which is a Ti—Ni—Sb-based composite oxide pigment and exhibits a lemon yellow color, are said to be excellent (for example, the document “Solar Energy). See “Metals & Solar Cells 89 (2005) p351-389 publicly by Elsevier”).
  • the present inventors have obtained a plurality of commercially available products of the above-mentioned chromium titanium yellow and nickel titanium yellow, and confirmed that the coating films using each of them alone as a pigment have excellent near-infrared reflection performance. did. It is considered that this is because the pigment absorbs less light in the near infrared region and has a high refractive index and excellent light scattering property. In fact, since the molar ratio of titanium dioxide in the composite oxide is 90% or more, it is estimated that the refractive index of the composite oxide is slightly lower than the refractive index of 2.7 of titanium oxide. ..
  • chrome titanium yellow is superior in reflectivity in the near-infrared region close to visible light, that is, on the short wavelength side, as compared with nickel titanium yellow. Since the energy of near-infrared rays from the sun increases as the wavelength becomes shorter, chromium titanium yellow has excellent characteristics as a base pigment for heat-shielding pigments as compared with nickel titanium yellow. Furthermore, since the brightness of chrome titanium yellow is lower than that of nickel titanium yellow, also in this respect, as a base pigment for a heat shield pigment having an L * value of 70 or less in the color space of L * a * b *. , Chrome titanium yellow is considered to be excellent.
  • chrome titanium yellow is used as a base pigment and mixed with other pigments to form a paint
  • the present inventors further apply the a * value of the chrome titanium yellow pigment in the color space of L * a * b *.
  • the coating film containing the chromium titanium yellow pigment having a large a * value has a higher reflectance to near infrared rays. I found.
  • the heat-shielding paint according to this embodiment is The above-mentioned used when the set value of the color of the dry coating film after applying the heat-shielding paint is 0 or more in a * and 0 or more in b * in the color space of L * a * b *.
  • the content of the pigment is 50% by mass or more with respect to the total pigment components, and the content of the pigments other than the composite oxide pigment and the titanium oxide pigment among the other pigments is the content of the chromium titanium yellow pigment. Less than half.
  • the set value of the color of the dry coating film after the heat-shielding paint is applied is 0 or more in the color space of L * a * b *.
  • the content of the chromium titanium yellow pigment is 30% by mass or more with respect to the total pigment components, and is Among the other pigments, the content of the pigment excluding the composite oxide pigment and the titanium oxide pigment is less than half of the content of the chromium titanium yellow pigment.
  • the color of the chrome titanium yellow pigment was measured under the following conditions using a spectroscopic colorimeter SE6000 (manufactured by Nippon Denshoku Industries Co., Ltd.) capable of measuring from a powder attachment. Measurement method: Reflective CIE standard light source: D65 Field of view: 10 ° And said.
  • the color of the chromium titanium yellow pigment is generated by the absorption of a specific wavelength accompanying the dd transition of the transition metal Cr.
  • the fact that the chromium titanium yellow pigment has a large a * value (that is, has a reddish tint) means that the transition energy is (more) larger and the absorption wavelength is (more) larger due to the crystal structure and the like. It is considered that the shift to the short wavelength side caused the light on the long wavelength side to be (more) scattered in the visible light. As a result, it is considered that the absorption of near-infrared rays close to visible light is reduced and the reflectivity of near-infrared rays is improved.
  • chromium titanium yellow is a solid solution, chromium, antimony, etc. are not extracted.
  • most of the yellow pigments containing chromium have hexavalent chromium, whereas chromium titanium yellow has trivalent chromium, so that the pigment has relatively low toxicity even when used as a base pigment. It becomes.
  • titanium oxide which is a white pigment
  • has strong photocatalytic activity deterioration of the coating film is prevented by applying a surface treatment to the surface of titanium oxide particles.
  • chromium titanium yellow has the same rutile crystal structure as titanium oxide, its photocatalytic activity is extremely low. Therefore, even when the surface treatment is not applied, the weather resistance is about the same as that of titanium oxide which has been subjected to the surface treatment of a high weather resistance grade.
  • the other pigment is not particularly limited, but from the viewpoint of heat shielding property and weather resistance of the obtained coating film, for example, the pigments listed below are preferably used.
  • Thermal barrier paints are generally used by dispersing pigments in synthetic resin.
  • the synthetic resin to be used is not particularly limited, and can be appropriately selected depending on the intended use of the paint, the required quality, and the like. Examples thereof include acrylic resin, styrene resin, urethane resin, silicone resin, fluororesin, epoxy resin, melamine resin, alkyd resin, vinyl chloride resin, vinyl acetate resin, polyester resin and the like. These resins may be mixed and used, or may be modified or copolymerized with the resins. Further, an emulsion-based resin in which the synthetic resin is dispersed in a dispersion medium such as water, or a solvent-based resin in which the synthetic resin is dissolved in a solvent such as an organic solvent may be used.
  • the content thereof shall be half or less of the content of the chromium titanium yellow pigment.
  • the heat-shielding paint according to the present embodiment may contain components other than pigments and synthetic resins, if necessary.
  • various additives, film-forming aids, adjusting agents, extender pigments, aggregates, etc. May include.
  • Table 1 shows the chromium titanium yellow pigment used in the examples as the base pigment.
  • Table 2 shows composite oxide pigments other than chromium titanium yellow used in Comparative Examples as base pigments.
  • Table 3 shows other pigments used in Examples and Comparative Examples.
  • the pigments of the symbols C2, C4, C6 and C7 are dispersions dispersed in water.
  • the pigment concentration of the symbols C3 and C5 was set to 30% by mass, and the pigment concentration of the other pigments was set to 55% by mass.
  • the dispersion of each pigment is mixed with the obtained clearing agent so as to have a predetermined color, specifically, three types of hues of beige, green, and dark brown. Then, the paints of each Example and each Comparative Example were prepared. The composition of the coating material was adjusted so that the mass of the solid content of the synthetic resin and the mass of all the pigments were equal to each other, and the dry coating film component in the coating material was 50% by mass.
  • Green color paint Table 5 shows the pigments used and the blending amounts of the green paints.
  • B * 4 ⁇ 1.5, and the color was adjusted so as to be within the range.
  • the spectral reflectance of the black portion of the obtained test piece was measured using a spectrophotometer (SolidSpec 3700: Shimadzu Corporation) within a wavelength range of 300 to 2500 nm.
  • a fluororesin-based standard white plate was used as the standard white plate.
  • the obtained measurement results are based on JIS K5602 (2008), and solar radiation is applied to three wavelength ranges: the entire wavelength range (300 to 2500 nm), the ultraviolet and visible light range (300 to 780 nm), and the near infrared region (780 to 2500 nm). The reflectance was calculated.
  • FIG. 1 shows a diagram in which the spectral reflectance in each wavelength region of the test piece using the beige paint according to the present embodiment is plotted.
  • FIG. 2 shows a diagram in which the spectral reflectances in each wavelength region of the test piece using the green paint according to the present embodiment are plotted.
  • FIG. 3 shows a diagram in which the spectral reflectances in each wavelength region of the test piece using the dark brown color-based paint according to the present embodiment are plotted.
  • Table 7 shows the calculation results of the radiation reflectance of the test piece using the beige paint according to the present embodiment.
  • Table 8 shows the calculation results of the radiation reflectance of the test piece using the green paint according to the present embodiment.
  • Table 9 shows the calculation results of the radiation reflectance of the test piece using the dark brown color-based paint according to the present embodiment.
  • FIGS. 1 and 7, FIGS. 2 and 8, and 3 and 9 this implementation is performed on any of the beige paint, the green paint, and the dark brown paint. It was found that the heat-shielding paint according to the form has excellent solar reflectance in the near-infrared region.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une peinture de protection thermique qui est utilisée lorsque les valeurs de la couleur d'un film de revêtement sec après application en revêtement de la peinture de protection thermique sont fixées dans l'espace colorimétrique L*a*b* de telle sorte que a* vaut au moins 0 et b* vaut au moins 0, la peinture de protection thermique contenant : un pigment jaune de chrome et de titane ayant une valeur de a* d'au moins 19 dans l'espace colorimétrique L*a*b* ; et d'autres pigments différents du pigment jaune de chrome et de titane, la teneur du pigment jaune de de chrome et de titane étant d'au moins 50 % en masse par rapport aux composants pigments totaux et la teneur de pigments, parmi les autres pigments, autres qu'un pigment oxyde complexe et un pigment oxyde de titane étant inférieure à la moitié de la teneur du pigment jaune de chrome et de titane.
PCT/JP2020/012221 2019-04-11 2020-03-19 Peinture de protection thermique WO2020209029A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019075587A JP6717475B1 (ja) 2019-04-11 2019-04-11 遮熱塗料
JP2019-075587 2019-04-11

Publications (1)

Publication Number Publication Date
WO2020209029A1 true WO2020209029A1 (fr) 2020-10-15

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JP (1) JP6717475B1 (fr)
WO (1) WO2020209029A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000212475A (ja) * 1999-01-26 2000-08-02 Katsuo Miki 太陽熱遮蔽塗料
JP2004251108A (ja) * 2003-01-31 2004-09-09 Kajima Road Co Ltd 道路等の舗装体
JP2011089115A (ja) * 2009-09-25 2011-05-06 Bekku Kk コーティング材
CN106833153A (zh) * 2016-12-26 2017-06-13 江苏特丰新材料科技有限公司 一种高近红外反射比的黄色建筑涂料及其制备方法
WO2018108529A1 (fr) * 2016-12-12 2018-06-21 Norsk Hydro Asa Produit composite

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT355149B (de) * 1978-01-24 1980-02-11 Basf Farben & Fasern Verfahren zur herstellung von im glanz- bzw. deckvermoegen verbesserten pigmentzusammen- setzungen
JPH02185572A (ja) * 1989-01-12 1990-07-19 Nippon Steel Chem Co Ltd 太陽熱遮蔽塗料組成物及び被覆構造物
JP2003293673A (ja) * 2002-04-02 2003-10-15 Katsuo Miki 赤外線反射機能を有するブラインド

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000212475A (ja) * 1999-01-26 2000-08-02 Katsuo Miki 太陽熱遮蔽塗料
JP2004251108A (ja) * 2003-01-31 2004-09-09 Kajima Road Co Ltd 道路等の舗装体
JP2011089115A (ja) * 2009-09-25 2011-05-06 Bekku Kk コーティング材
WO2018108529A1 (fr) * 2016-12-12 2018-06-21 Norsk Hydro Asa Produit composite
CN106833153A (zh) * 2016-12-26 2017-06-13 江苏特丰新材料科技有限公司 一种高近红外反射比的黄色建筑涂料及其制备方法

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JP2020172596A (ja) 2020-10-22

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