WO2023171512A1 - 紫外線反射用組成物 - Google Patents

紫外線反射用組成物 Download PDF

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Publication number
WO2023171512A1
WO2023171512A1 PCT/JP2023/007684 JP2023007684W WO2023171512A1 WO 2023171512 A1 WO2023171512 A1 WO 2023171512A1 JP 2023007684 W JP2023007684 W JP 2023007684W WO 2023171512 A1 WO2023171512 A1 WO 2023171512A1
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volume
content
filler
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English (en)
French (fr)
Japanese (ja)
Inventor
仁 金子
碧美 佐藤
健志 浅見
翔太 外川
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Denka Co Ltd
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Denka Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/541—Silicon-containing compounds containing oxygen
    • C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/16—Homopolymers or copolymers or vinylidene fluoride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/20—Homopolymers or copolymers of hexafluoropropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes

Definitions

  • the present invention relates to ultraviolet reflecting compositions and the like.
  • Patent Document 1 discloses a laminate that includes a protective layer containing a silicone composition and an aluminum foil that supports the protective layer as a member that can be used in sterilization using UVC. .
  • UVC ultraviolet C
  • it may be required to reflect the UVC emitted from the light source.
  • UVC in order to efficiently utilize the UVC emitted from the light source and to prevent UVC from leaking out of the device, it is necessary to reflect UVC on the inner wall of the device. There is.
  • ultraviolet reflecting compositions that can be used to reflect UVC in various applications, it is required to suppress a decrease in reflectance when the ultraviolet reflecting composition is kept at high temperatures. In particular, it is required to suppress a decrease in reflectance for light with a wavelength of 270 to 280 nm.
  • One aspect of the present invention is to provide an ultraviolet reflecting composition that is capable of suppressing a decrease in reflectance for light with a wavelength of 270 to 280 nm when maintained at a high temperature.
  • the present invention relates to the following [1] to [20].
  • Reflective composition [6] The composition for ultraviolet reflection according to any one of [1] to [5], wherein the filler has a particle size D50 of 0.1 to 20 ⁇ m.
  • the inorganic filler includes at least one member selected from the group consisting of zirconium oxide, silicon dioxide, aluminum oxide, magnesium oxide, calcium oxide, calcium carbonate, calcium sulfate, and barium sulfate.
  • composition for reflecting ultraviolet light [9] The ultraviolet reflecting composition according to any one of [1] to [8], wherein the filler has a silane compound on the surface of the filler. [10] The composition for ultraviolet reflection according to [9], wherein the silane compound contains an alkyl alkoxysilane compound. [11] The ultraviolet reflection according to [9] or [10], wherein the silane compound includes an alkoxysilane compound having at least one selected from the group consisting of a methoxy group, an ethoxy group, an n-propoxy group, and an isopropoxy group. Composition for use.
  • the composition for reflecting ultraviolet rays according to item 1. [17] The ultraviolet reflecting composition according to any one of [1] to [16], wherein the base material is liquid at 23°C. [18] The composition for ultraviolet reflection according to [17], wherein the base material contains an organic solvent.
  • the ultraviolet reflecting composition according to any one of [1] to [16] which is in the form of a film.
  • an ultraviolet reflecting composition that can suppress a decrease in reflectance for light with a wavelength of 270 to 280 nm when maintained at a high temperature.
  • the numerical range "A or more” means A and a range exceeding A.
  • the numerical range “A or less” means a range of A and less than A.
  • the upper limit or lower limit of the numerical range of one step can be arbitrarily combined with the upper limit or lower limit of the numerical range of another step.
  • the upper limit or lower limit of the numerical range may be replaced with the values shown in the experimental examples.
  • “A or B” may include either A or B, or may include both. The materials exemplified herein can be used alone or in combination of two or more, unless otherwise specified.
  • the content of each component in the composition means the total amount of the plurality of substances present in the composition, unless otherwise specified.
  • the term "process” is included in the term not only an independent process but also a process that cannot be clearly distinguished from other processes as long as the intended effect of the process is achieved.
  • the solid content of the resin composition refers to the nonvolatile content excluding volatile content (water, organic solvent, etc.) that can be volatilized in the resin composition. That is, the solid content refers to components that remain without being volatilized during drying of the resin composition, and also includes components that are liquid, starch syrup-like, wax-like, etc. at 23°C.
  • the ultraviolet reflection composition according to the present embodiment (including the ultraviolet reflection compositions according to the first embodiment and second embodiment described below; the same applies hereinafter) comprises a filler, a base material, and a hydrosilyl group having a hydrosilyl group. Contains a compound.
  • the composition for reflecting ultraviolet rays when the composition for ultraviolet ray reflection is kept at a high temperature (for example, when kept at 85° C. for 1000 hours), the reflectance for light with a wavelength of 270 to 280 nm is The decrease can be suppressed.
  • the ultraviolet reflection composition according to the present embodiment it is possible to suppress a decrease in reflectance when the film-like ultraviolet reflection composition with an average thickness of 100 ⁇ m is kept at a high temperature, for example, A retention rate of 86% or more (preferably 90% or more, 92% or more, 95% or more, 97% or more, etc.) can be obtained by the evaluation method described in the Examples below.
  • the ultraviolet reflecting composition When the ultraviolet reflecting composition is kept at a high temperature, unsaturated bonds may be generated in the base material as a light absorption source. On the other hand, in the ultraviolet reflecting composition according to the present embodiment, it is presumed that such unsaturated bonds are consumed by reacting with the hydrosilyl group of the hydrosilyl compound, and thus the decrease in reflectance is suppressed. However, the reason is not limited to the content.
  • a high reflectance for light having a wavelength of 270 to 280 nm is obtained as a reflectance for deep ultraviolet rays before the composition for ultraviolet reflection is maintained at a high temperature.
  • a reflectance of 80% or more (preferably 82% or more, 85% or more, 87% or more, 90% or more, etc.) can be obtained by the evaluation method described in the Examples below.
  • the ultraviolet reflection composition is maintained at a high temperature while obtaining a high reflectance before the ultraviolet reflection composition is maintained at a high temperature. It is possible to suppress a decrease in the reflectance during the treatment, and it is possible to obtain a high reflectance before and after the composition for ultraviolet reflection is maintained at a high temperature.
  • the ultraviolet reflecting composition according to the present embodiment may be used to reflect light of a wavelength (wavelength band) different from the wavelength of 270 to 280 nm (light with a wavelength of 200 to 300 nm, light with a wavelength of 200 nm or more and less than 300 nm, etc.). good.
  • the ultraviolet reflecting composition according to this embodiment contains a filler.
  • the filler may be dispersed within the matrix.
  • examples of fillers include inorganic fillers and organic fillers (eg, resin fillers).
  • the filler may include an inorganic filler from the viewpoint of easily obtaining high reflectance.
  • Inorganic fillers include zirconium oxide (e.g. ZrO 2 ), silicon dioxide, aluminum oxide, magnesium oxide, calcium oxide, calcium carbonate, calcium sulfate, barium sulfate, yttrium oxide, hafnium oxide, lanthanum oxide, barium oxide, barium carbonate, nitride. Examples include aluminum and boron nitride.
  • the inorganic filler may contain at least one member selected from the group consisting of zirconium oxide, silicon dioxide, aluminum oxide, magnesium oxide, calcium oxide, calcium carbonate, calcium sulfate, and barium sulfate, from the viewpoint of easily obtaining high reflectance. .
  • the filler may contain zirconium oxide particles from the viewpoint of easily obtaining high reflectance.
  • Zirconium oxide particles are particles containing zirconium oxide. Fillers such as zirconium oxide particles have a relatively large band gap and are difficult to absorb light with a wavelength of 270 to 280 nm, so their reflectance tends to increase. Furthermore, zirconium oxide particles have a high refractive index, and light with a wavelength of 270 to 280 nm is easily scattered by the zirconium oxide particles without being absorbed by the base material, so that the reflectance tends to increase.
  • the factors that increase the reflectance are not limited to these details.
  • the zirconium oxide particles may be stabilized zirconia, partially stabilized zirconia, unstabilized zirconia, or the like.
  • the zirconium oxide particles may contain metal oxides other than zirconium oxide.
  • Such metal oxides include hafnium oxide (e.g. HfO 2 ), silicon oxide (e.g. SiO 2 ), iron oxide (e.g. Fe 2 O 3 ), titanium oxide (e.g. TiO 2 ), yttria oxide, cerium oxide, Examples include magnesium and calcium oxide.
  • the zirconium oxide particles may include hafnia stabilized zirconia.
  • the total amount of zirconium oxide and hafnium oxide in the zirconium oxide particles may be in the following range based on the total mass of the zirconium oxide particles.
  • the total amount is 90% by mass or more, 93% by mass or more, 94% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, 99.5% by mass or more, or 99.8% by mass or more. It's good.
  • the total amount may be less than 100% by weight, 99.9% by weight or less, 99.8% by weight or less, 99.5% by weight or less, 99% by weight or less, 98% by weight or less, or 95% by weight or less. . From these viewpoints, the total amount may be 90% by mass or more and less than 100% by mass, 95-99.9% by mass, or 99-99.9% by mass.
  • the content of silicon oxide in the zirconium oxide particles may be in the following range based on the total mass of the zirconium oxide particles.
  • the content of silicon oxide is more than 0 mass%, 0.005 mass% or more, 0.01 mass% or more, 0.02 mass% or more, 0.03 mass% or more, 0.04 mass% or more, or 0 It may be .05% by mass or more.
  • the content of silicon oxide is 0.5% by mass or less, 0.3% by mass or less, 0.1% by mass or less, 0.08% by mass or less, 0.06% by mass or less, 0.05% by mass or less, 0 It may be 0.04% by weight or less, 0.03% by weight or less, or 0.02% by weight or less. From these viewpoints, the content of silicon oxide may be more than 0% by mass and 0.5% by mass or less, 0.01 to 0.1% by mass, or 0.03 to 0.08% by mass.
  • the content A of at least one selected from the group consisting of iron oxide content and titanium oxide content in the zirconium oxide particles may be in the following range based on the total mass of the zirconium oxide particles.
  • Content A is more than 0 mass%, 0.001 mass% or more, 0.003 mass% or more, 0.005 mass% or more, 0.008 mass% or more, 0.009 mass% or more, or 0.01 It may be % by mass or more.
  • Content A is 0.2% by mass or less, 0.1% by mass or less, 0.08% by mass or less, 0.05% by mass or less, 0.04% by mass or less, 0.03% by mass or less, 0.02 It may be less than or equal to 0.01 mass%, 0.009 mass% or less, 0.008 mass% or less, or 0.005 mass% or less. From these viewpoints, the content A may be more than 0% by mass and 0.2% by mass or less, 0.001 to 0.1% by mass, or 0.005 to 0.05% by mass.
  • the filler may have a silane compound on its surface from the viewpoint of easily obtaining a high reflectance.
  • the present inventors speculate as follows about the reason why high reflectance is easily obtained.
  • the reason is not limited to the following.
  • functional groups e.g., hydroxyl groups
  • the constituent material of the base material e.g., fluororesin
  • the silane compound suppresses contact between the filler and the base material. This suppresses deterioration of the constituent materials of the base material, making it easier to obtain a high reflectance.
  • the silane compound may include an alkoxysilane compound (a compound having an alkoxy group bonded to a silicon atom) from the viewpoint of easily obtaining a high reflectance.
  • the number of alkoxy groups (alkoxy groups bonded to silicon atoms) in the alkoxysilane compound is 1 to 4, and from the viewpoint of easily obtaining high reflectance, the silane compound is an alkoxysilane compound having the number of alkoxy groups of 1 to 3. and an alkoxysilane compound having 2 to 3 alkoxy groups.
  • the alkoxy group examples include methoxy group, ethoxy group, n-propoxy group, and isopropoxy group.
  • the silane compound may contain an alkoxysilane compound having at least one selected from the group consisting of a methoxy group, an ethoxy group, an n-propoxy group, and an isopropoxy group, from the viewpoint of easily obtaining a high reflectance. It may contain a silane compound.
  • the silane compound may include an alkyl alkoxysilane compound (a compound having an alkoxy group and an alkyl group bonded to a silicon atom) from the viewpoint of easily obtaining a high reflectance.
  • the number of alkyl groups (alkyl groups bonded to silicon atoms) in the alkyl alkoxysilane compound is 1 to 3.
  • the silane compound may include an alkyl alkoxysilane compound having 1 to 2 alkyl groups from the viewpoint of easily obtaining a high reflectance.
  • the alkyl group (alkyl group bonded to a silicon atom) in the alkyl alkoxysilane compound may have a substituent.
  • substituents include a halogeno group (fluoro group, chloro group, bromo group, etc.), amino group, (meth)acryloyl group, vinyl group, styryl group, mercapto group, glycidyl group, and the like.
  • the silane compound may include an alkylalkoxysilane compound having a halogenoalkyl group (an alkyl group substituted with a halogeno group), an alkylalkoxysilane compound having a fluoroalkyl group, and an alkylalkoxysilane compound having a trifluoroalkyl group. It may contain a silane compound.
  • Silane compounds should have an alkyl group (an alkyl group bonded to a silicon atom) with a carbon number in the following range, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperatures and from the viewpoint of easily obtaining a high reflectance.
  • alkylalkoxysilane compounds The number of carbon atoms in the alkyl group may be 1 or more, 2 or more, 3 or more, 4 or more, 5 or more, 6 or more, 8 or more, 10 or more, 12 or more, 14 or more, or 16 or more.
  • the number of carbon atoms in the alkyl group may be 20 or less, 18 or less, 16 or less, 14 or less, 12 or less, 10 or less, 8 or less, 6 or less, 5 or less, 4 or less, or 3 or less. From these viewpoints, the number of carbon atoms in the alkyl group may be 1 to 20, 2 to 18, 3 to 16, 3 to 8, 3 to 6, 8 to 16, or 12 to 16.
  • the number of carbon atoms in the alkyl group includes the number of carbon atoms in the above-mentioned substituents.
  • silane compounds include butyltriethoxysilane, dodecyltriethoxysilane, dodecyltrimethoxysilane, decyltriethoxysilane, dimethoxy(methyl)-n-octylsilane, triethoxyethylsilane, ethyltrimethoxysilane, hexyltrimethoxysilane, Hexyltriethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, triethoxymethylsilane, trimethoxy(methyl)silane, methoxy(dimethyl)octadecylsilane, methoxy(dimethyl)-n-octylsilane, octadecyltriethoxysilane, Triethoxy-n-octylsilane, octadec
  • the silane compound is selected from the group consisting of hexadecyltrimethoxysilane and trimethoxy(propyl)silane from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance.
  • the content of the inorganic filler or the content of the zirconium oxide particles is 50% by mass or more, more than 50% by mass, or 60% by mass based on the total mass of the filler (the total mass of the filler contained in the composition for ultraviolet reflection). % or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 92% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass. .
  • the content of the zirconium oxide particles is 50% by mass or more, more than 50% by mass, 60% by mass or more, 70% by mass based on the total mass of the inorganic filler (total mass of the inorganic filler contained in the composition for ultraviolet reflection). The content may be 80% by mass or more, 90% by mass or more, 92% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass.
  • the filler particle size D50 is 20 ⁇ m or less, 15 ⁇ m or less, 10 ⁇ m or less, 8.0 ⁇ m or less, 5.0 ⁇ m or less, 3.0 ⁇ m or less, 2.0 ⁇ m or less, 1.0 ⁇ m or less, It may be less than 1.0 ⁇ m, 0.9 ⁇ m or less, 0.8 ⁇ m or less, 0.7 ⁇ m or less, 0.6 ⁇ m or less, 0.5 ⁇ m or less, 0.4 ⁇ m or less, or 0.3 ⁇ m or less.
  • the particle size D50 of the filler may be 0.01 ⁇ m or more, 0.05 ⁇ m or more, 0.1 ⁇ m or more, 0.2 ⁇ m or more, or 0.3 ⁇ m or more from the viewpoint of easily obtaining a high reflectance.
  • the particle size D50 of the filler may be 0.4 ⁇ m or more. From these viewpoints, the particle size D50 of the filler is 0.01 to 20 ⁇ m, 0.01 to 10 ⁇ m, 0.01 to 1.0 ⁇ m, 0.01 to 0.5 ⁇ m, 0.01 to 0.4 ⁇ m, 0.
  • the particle size D50 of the filler can be measured by the method described in Examples below.
  • the content of filler or the content of zirconium oxide particles is the total mass of filler, base material (solid content), and hydrosilyl compound, and the total mass of zirconium oxide particles, base material (solid content), and hydrosilyl compound. It may be in the following range based on the total mass, the total mass of filler, fluororesin, and hydrosilyl compound, or the total mass of zirconium oxide particles, fluororesin, and hydrosilyl compound.
  • Content A1 is 1% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content A1 may be 44% by mass or more, 45% by mass or more, 50% by mass or more, or 55% by mass or more from the viewpoint of easily obtaining a high reflectance.
  • Content A1 is 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. % or less, or 60% by mass or less.
  • the content A1 may be 55% by mass or less, 50% by mass or less, 45% by mass or less, or 44% by mass or less, from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Content A1 may be 43% by mass or less, 42% by mass or less, 40% by mass or less, 35% by mass or less, or 30% by mass or less.
  • the content A1 is 1 to 80% by mass, 1 to 60% by mass, 1 to 50% by mass, 10 to 80% by mass, 10 to 60% by mass, 10 to 50% by mass, 20 to 80% by mass. %, 20-60% by mass, 20-50% by mass, 30-80% by mass, 30-60% by mass, 30-50% by mass, 40-80% by mass, 40-60% by mass, or 40-50% by mass It may be %.
  • the content of filler or the content of zirconium oxide particles is the total mass of filler and base material (solid content), the total mass of zirconium oxide particles and base material (solid content), filler and It may be in the following range based on the total mass of the fluororesin or the total mass of the zirconium oxide particles and the fluororesin.
  • Content A2 is 1% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content A2 may be 50% by mass or more, 55% by mass or more, 58% by mass or more, or 59% by mass or more from the viewpoint of easily obtaining a high reflectance.
  • Content A2 is 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. % or less, 60% by mass or less, or 59% by mass or less.
  • Content A2 is 58% by mass or less, 55% by mass or less, 50% by mass or less, 48% by mass or less, or 46% by mass or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature. There may be. Content A2 may be 45% by mass or less, 42% by mass or less, 40% by mass or less, 35% by mass or less, or 30% by mass or less. From these points of view, the content A2 is 1 to 80% by mass, 1 to 60% by mass, 1 to 50% by mass, 10 to 80% by mass, 10 to 60% by mass, 10 to 50% by mass, 20 to 80% by mass. %, 20-60% by mass, 20-50% by mass, 30-80% by mass, 30-60% by mass, 30-50% by mass, 40-80% by mass, 40-60% by mass, or 40-50% by mass It may be %.
  • the content of the filler or the content of the zirconium oxide particles is within the following range based on the total mass of the filler and the hydrosilyl compound, or the total mass of the zirconium oxide particles and the hydrosilyl compound. good.
  • Content A3 is 30% by mass or more, 40% by mass or more, 50% by mass or more, 50% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. %, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 88% by mass or more.
  • Content A3 may be 90% by mass or more, or 93% by mass or more from the viewpoint of easily obtaining a high reflectance.
  • Content A3 is less than 100% by mass, 99% by mass or less, 98% by mass or less, and 95% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, or 94% by mass or less.
  • the content A3 may be 93% by mass or less, or 90% by mass or less, from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Content A3 may be 88% by mass or less, 85% by mass or less, or 80% by mass or less.
  • content A3 is 30% by mass or more and less than 100% by mass, 30-95% by mass, 30-90% by mass, 50% by mass or more and less than 100% by mass, 50-95% by mass, 50-90% by mass. %, 80% by mass or more and less than 100% by mass, 80-95% by mass, or 80-90% by mass.
  • the ultraviolet reflecting composition according to this embodiment contains a base material.
  • the constituent materials of the base material include fluororesins; compounds having a siloxane bond such as polysiloxane and polysiloxane derivatives (e.g. organopolysiloxane); (meth)acrylate compounds (compounds having an acryloyl group or a methacryloyl group; for example, Examples include (meth)acrylate compounds in which an alicyclic hydrocarbon group having 6 or more carbon atoms is ester bonded.
  • the base material may contain a fluororesin from the viewpoint of easily suppressing a decrease in reflectance when kept at a high temperature and from the viewpoint of easily obtaining a high reflectance.
  • the fluororesin is a resin containing a fluorine atom, and may be a resin having a compound (monomer) containing a fluorine atom as a monomer unit. Since fluororesin is difficult to absorb light with a wavelength of 270 to 280 nm, it is presumed that the reflectance tends to increase because light with a wavelength of 270 to 280 nm is easily scattered by the filler without being absorbed by the fluororesin. However, the factors that increase the reflectance are not limited to this content.
  • the compound (monomer) that provides the monomer unit of the fluororesin it is possible to use a compound having a carbon-carbon double bond and a fluorine atom, such as vinylidene fluoride, tetrafluoroethylene, chlorotrifluoroethylene, etc. Examples include ethylene, hexafluoropropylene, vinyl fluoride, perfluoroalkyl vinyl ether, and the like. That is, the fluororesin can have a compound having a carbon-carbon double bond and a fluorine atom as a monomer unit (a monomer unit derived from a compound having a carbon-carbon double bond and a fluorine atom). .
  • the fluororesin may have a compound (monomer) that does not contain a fluorine atom as a monomer unit.
  • compounds (monomers) that do not contain fluorine atoms include ethylene, propylene, and the like.
  • the fluororesin may have a carbon chain as the main chain (longest molecular chain). The fluororesin does not need to have a siloxane bond and does not need to have a siloxane bond in its main chain.
  • the fluororesin contains at least one member selected from the group consisting of vinylidene fluoride and hexafluoropropylene, from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperatures and from the viewpoint of easily obtaining a high reflectance. It may be present as a mer unit.
  • fluororesins are made from vinylidene fluoride monomer units (vinylidene fluoride-derived monomer units) from the viewpoint of easily suppressing the decline in reflectance when kept at high temperatures and from the viewpoint of easily obtaining high reflectance. mer units) and hexafluoropropylene monomer units (hexafluoropropylene-derived monomer units).
  • the fluororesin may have vinylidene fluoride and hexafluoropropylene as monomer units from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. .
  • the content of the monomer units of vinylidene fluoride may be in the following range based on the total mass of the monomer units of the fluororesin (monomer units that constitute the fluororesin; the same shall apply hereinafter).
  • the content of monomer units of vinylidene fluoride is 50% by mass or more, 60% by mass or more from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. , 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more.
  • the content of the monomer unit of vinylidene fluoride is 100% by mass or less, less than 100% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. , 95% by mass or less, or 90% by mass or less.
  • the content of vinylidene fluoride monomer units may be 85% by mass or less, or 80% by mass or less. From these viewpoints, the content of monomer units of vinylidene fluoride is 50 to 100% by mass, 50 to 100% by mass, 60 to 95% by mass, 70 to 95% by mass, 75 to 85% by mass. , 85-95% by weight, or 80-90% by weight.
  • the content of the monomer units of hexafluoropropylene may be in the following range based on the total mass of the monomer units of the fluororesin.
  • the content of the monomer unit of hexafluoropropylene is more than 0% by mass and 1% by mass or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. , 5% by mass or more, or 10% by mass or more.
  • the content of monomer units of hexafluoropropylene may be 15% by mass or more, or 20% by mass or more.
  • the content of the monomer unit of hexafluoropropylene is 50% by mass or less, 40% by mass or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. , 35% by mass or less, 30% by mass or less, 25% by mass or less, 20% by mass or less, 15% by mass or less, or 10% by mass or less. From these viewpoints, the content of monomer units of hexafluoropropylene is more than 0% by mass and 50% by mass or less, 5 to 40% by mass, 5 to 30% by mass, 15 to 25% by mass, and 5 to 15% by mass. , or 10 to 20% by mass.
  • the weight average molecular weight of the fluororesin is 1.0 x 10 4 or more and 3.0 x 10 from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. 4 or more, 5.0 ⁇ 10 4 or more, 8.0 ⁇ 10 4 or more, 10.0 ⁇ 10 4 or more, 12.0 ⁇ 10 4 or more, 14.0 ⁇ 10 4 or more, 14.4 ⁇ 10 4 or more , 14.5 ⁇ 10 4 or more, 14.8 ⁇ 10 4 or more, or 14.9 ⁇ 10 4 or more.
  • the weight average molecular weight of the fluororesin is 50.0 x 10 4 or less, 40.0 x 10 from the viewpoint of easily suppressing the decline in reflectance when kept at high temperatures and from the viewpoint of easily obtaining high reflectance.
  • the weight average molecular weight of the fluororesin may be 14.8 ⁇ 10 4 or less, 14.5 ⁇ 10 4 or less, or 14.4 ⁇ 10 4 or less.
  • the weight average molecular weight of the fluororesin is 1.0 ⁇ 10 4 to 50.0 ⁇ 10 4 , 5.0 ⁇ 10 4 to 30.0 ⁇ 10 4 , 10.0 ⁇ 10 4 to 20 .0 ⁇ 10 4 , 10.0 ⁇ 10 4 to 14.5 ⁇ 10 4 , 14.5 ⁇ 10 4 to 20.0 ⁇ 10 4 , or 12.0 ⁇ 10 4 to 18.0 ⁇ 10 4 It's good.
  • the weight average molecular weight of the fluororesin can be measured by the method described in Examples below.
  • the base material may not contain a compound having a siloxane bond, and may not contain at least one selected from the group consisting of polysiloxane and polysiloxane derivatives.
  • the content of the compound having a siloxane bond is 100 parts by mass or less, less than 100 parts by mass, 15 parts by mass or less, 10 parts by mass with respect to 100 parts by mass of the fluororesin. The following may be less than 10 parts by mass, 1 part by mass or less, less than 1 part by mass, 0.1 parts by mass or less, less than 0.1 parts by mass, 0.01 parts by mass or less, or less than 0.01 parts by mass. .
  • the content of the base material (solid content) or the content of fluororesin is the total mass of the filler, base material (solid content), and hydrosilyl compound, zirconium oxide particles, base material (solid content) ) and the hydrosilyl compound, the total mass of the filler, the fluororesin, and the hydrosilyl compound, or the total mass of the zirconium oxide particles, the fluororesin, and the hydrosilyl compound.
  • Content B1 is 1% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content B1 may be 40% by mass or more, 45% by mass or more, or 50% by mass or more from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Content B1 may be 55% by mass or more, 60% by mass or more, or 65% by mass or more.
  • Content B1 is 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content B1 may be 50% by mass or less, 45% by mass or less, or 40% by mass or less from the viewpoint of easily obtaining a high reflectance. From these viewpoints, the content B1 is 1 to 90% by mass, 1 to 70% by mass, 1 to 60% by mass, 30 to 90% by mass, 30 to 70% by mass, 30 to 60% by mass, 40 to 90% by mass. %, 40-70% by weight, 40-60% by weight, 50-90% by weight, 50-70% by weight, or 50-60% by weight.
  • the content of the base material (solid content) or the content of fluororesin is the total mass of the filler and the base material (solid content), the total mass of the zirconium oxide particles and the base material (solid content) , the total mass of filler and fluororesin, or the total mass of zirconium oxide particles and fluororesin, and may be in the following range.
  • Content B2 is 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 40% by mass or more, or 41% by mass or more.
  • Content B2 is 42% by mass or more, 45% by mass or more, 50% by mass or more, 52% by mass or more, or 54% by mass or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature. There may be.
  • Content B2 may be 55% by mass or more, 58% by mass or more, 60% by mass or more, 65% by mass or more, or 70% by mass or more.
  • Content B2 is 99% by mass or less, 95% by mass or less, 90% by mass or less, 85% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content B2 may be 50% by mass or less, 45% by mass or less, 42% by mass or less, or 41% by mass or less, from the viewpoint of easily obtaining a high reflectance. From these points of view, the content B2 is 20 to 99% by mass, 40 to 99% by mass, 50 to 99% by mass, 20 to 90% by mass, 40 to 90% by mass, 50 to 90% by mass, 20 to 80% by mass. %, 40-80% by mass, 50-80% by mass, 20-70% by mass, 40-70% by mass, 50-70% by mass, 20-60% by mass, 40-60% by mass, or 50-60% by mass It may be %.
  • the content of the base material (solid content) or the content of the fluororesin is the total mass of the base material (solid content) and the hydrosilyl compound, or the total mass of the fluororesin and the hydrosilyl compound. It may be in the following range based on mass.
  • Content B3 is 30% by mass or more, 40% by mass or more, 50% by mass or more, 50% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • Content B3 is less than 100 mass%, 99 mass% or less, 98 mass% or less, and 95 mass% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, 93% by mass or less, or 91% by mass or less. Content B3 may be 90.5% by mass or less from the viewpoint of easily obtaining high reflectance.
  • content B3 is 30% by mass or more and less than 100% by mass, 30-95% by mass, 30-92% by mass, 50% by mass or more and less than 100% by mass, 50-95% by mass, 50-92% by mass. %, 80% by mass or more and less than 100% by mass, 80-95% by mass, or 80-92% by mass.
  • the ultraviolet reflection composition according to the present embodiment contains a hydrosilyl compound as a compound having a hydrosilyl group.
  • the hydrosilyl compound can be used as a trapping agent for unsaturated bonds that may be generated in the base material when the ultraviolet reflecting composition is maintained at a high temperature.
  • the hydrosilyl compound may be dispersed within the matrix.
  • the hydrosilyl compound may contain silicone oil having a hydrosilyl group from the viewpoint of easily suppressing a decrease in reflectance when maintained at high temperatures.
  • the silicone oil is a linear polyalkylsiloxane, and may be a modified product in which a hydrogen atom is bonded instead of an alkyl group in a part of the siloxane that constitutes the main chain of the polyalkylsiloxane.
  • the silicone oil having a hydrosilyl group may have a partial structure represented by the following formula.
  • the silicone oil having hydrosilyl groups may be methyl hydrogen silicone oil or the like.
  • the kinematic viscosity at 25° C. of the hydrosilyl compound may be within the following range from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Kinematic viscosity is 50 mm 2 /second or less, less than 50 mm 2 /second, 45 mm 2 /second or less, 40 mm 2 /second or less, less than 40 mm 2 / second, 35 mm 2 /second or less, 30 mm 2 /second or less, 30 mm 2 /second It may be less than 25 mm 2 /sec, or less than 20 mm 2 /sec.
  • the kinematic viscosity may be 5 mm 2 /sec or more, 10 mm 2 /sec or more, 15 mm 2 /sec or more, or 20 mm 2 /sec or more.
  • Kinematic viscosity is a value obtained by dividing viscosity by density, and can be calculated based on values measured with a viscometer and a density meter.
  • the viscometer for example, the product name "MCR92" manufactured by Anton Paar can be used.
  • the density meter for example, the product name "Dry Automatic Density Meter Accupic II" manufactured by Shimadzu Corporation can be used.
  • the hydrosilyl functional group equivalent weight of the hydrosilyl compound may be in the following range.
  • the hydrosilyl group functional group equivalent is 200 g/mol or less, 180 g/mol or less, 175 g/mol or less, 150 g/mol or less, 140 g/mol or less, from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperature. It may be 130 g/mol or less, 120 g/mol or less, 100 g/mol or less, 90 g/mol or less, 80 g/mol or less, 70 g/mol or less, or 60 g/mol or less.
  • the hydrosilyl group functional group equivalent is 10 g/mol or more, 20 g/mol or more, 30 g/mol or more, 50 g/mol or more, or 60 g/mol from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperature. It may be more than that.
  • the hydrosilyl group functional group equivalent weight may be 70 g/mol or more, 80 g/mol or more, 90 g/mol or more, 100 g/mol or more, 120 g/mol or more, 130 g/mol or more, or 140 g/mol or more.
  • the hydrosilyl group functional group equivalent is 10 to 200 g/mol, 10 to 150 g/mol, 10 to 100 g/mol, 10 to 80 g/mol, 50 to 200 g/mol, 50 to 150 g/mol, 50 to It may be 100 g/mol, 50-80 g/mol, 100-200 g/mol, or 100-150 g/mol.
  • the hydrosilyl group functional group equivalent is the mass of the hydrosilyl compound per mol of the functional group, and can be calculated from, for example, the spectral intensity of 1 H-NMR (proton NMR) obtained by a nuclear magnetic resonance analyzer (NMR).
  • the content of the hydrosilyl compound is the total mass of the filler, the base material (solid content), and the hydrosilyl compound, the total mass of the zirconium oxide particles, the base material (solid content), and the hydrosilyl compound, the filler, the fluororesin, and the hydrosilyl compound. It may be in the following range based on the total mass or the total mass of zirconium oxide particles, fluororesin, and hydrosilyl compound.
  • the content of the hydrosilyl compound is 0.1% by mass or more, 0.5% by mass or more, 1 Mass% or more, 1.5 mass% or more, 2 mass% or more, 2.5 mass% or more, 3 mass% or more, 3.5 mass% or more, 4 mass% or more, 4.5 mass% or more, 5 mass%
  • the content may be 5.5% by mass or more, 6% by mass or more, 6.5% by mass or more, 7% by mass or more, or 7.5% by mass or more.
  • the content of the hydrosilyl compound is 20% by mass or less, 18% by mass or less, 15% by mass or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content of the hydrosilyl compound is 7.5% by mass or less, 7% by mass or less, 6.5% by mass or less, 6% by mass or less, 5.5% by mass or less, 5% by mass or less, 4.5% by mass or less, It may be 4% by mass or less, 3.5% by mass or less, or 3% by mass or less. From these viewpoints, the content of the hydrosilyl compound is 0.1-20% by mass, 0.1-10% by mass, 0.1-6% by mass, 2-20% by mass, 2-10% by mass, 2- It may be 6% by weight, 4-20% by weight, 4-10% by weight, or 4-6% by weight.
  • the content of the hydrosilyl compound may be in the following range based on the total mass of the filler and the hydrosilyl compound, or the total mass of the zirconium oxide particles and the hydrosilyl compound.
  • the content of the hydrosilyl compound is 70% by mass or less, 60% by mass or less, 50% by mass or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be less than 50% by weight, 45% by weight or less, 40% by weight or less, 35% by weight or less, 30% by weight or less, 25% by weight or less, 20% by weight or less, or 18% by weight or less.
  • the content of the hydrosilyl compound may be 15% by mass or less, 12% by mass or less, 10% by mass or less, or 7% by mass or less.
  • the content of the hydrosilyl compound is 1% by mass or more, more than 1% by mass, 2% by mass or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be 5% by mass or more, 6% by mass or more, 7% by mass or more, 10% by mass or more, 12% by mass or more, or 15% by mass or more.
  • the content of the hydrosilyl compound is 1 to 70% by mass, 5 to 70% by mass, 10 to 70% by mass, 1 to 20% by mass, 5 to 20% by mass, 10 to 20% by mass, 1 to It may be 12% by weight, 5-12% by weight, or 10-12% by weight.
  • the content of the hydrosilyl compound may be in the following range based on the total mass of the base material (solid content) and the hydrosilyl compound, or the total mass of the fluororesin and the hydrosilyl compound.
  • the content of the hydrosilyl compound is 70% by mass or less, 60% by mass or less, 50% by mass or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be less than 50% by weight, 45% by weight or less, 40% by weight or less, 35% by weight or less, 30% by weight or less, 25% by weight or less, 20% by weight or less, or 15% by weight or less.
  • the content of the hydrosilyl compound may be 13% by mass or less, 12% by mass or less, 10% by mass or less, 9% by mass or less, 7% by mass or less, or 6% by mass or less.
  • the content of the hydrosilyl compound is 1% by mass or more, more than 1% by mass, 2% by mass or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be 3% by mass or more, 5% by mass or more, 6% by mass or more, 7% by mass or more, 9% by mass or more, 10% by mass or more, 12% by mass or more, or 13% by mass or more.
  • the content of the hydrosilyl compound is 1 to 70% by mass, 1 to 20% by mass, 1 to 10% by mass, 3 to 70% by mass, 3 to 20% by mass, 3 to 10% by mass, 5 to It may be 70% by weight, 5-20% by weight, 5-10% by weight, 8-70% by weight, 8-20% by weight, or 8-10% by weight.
  • the ultraviolet reflecting composition according to the first embodiment is in an embodiment in which the base material is liquid at 23°C (an embodiment having fluidity).
  • the ultraviolet reflecting composition according to the first embodiment may be used as a paint, or may be used to obtain a film-like ultraviolet reflecting composition.
  • the base material of the ultraviolet reflection composition according to the first embodiment may contain volatile components such as water and organic solvents.
  • volatile components such as water and organic solvents.
  • organic solvents include acetone, methyl ethyl ketone, methyl isobutyl ketone, N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, 2,6-dimethyl-4-heptane, and diethyl carbonate.
  • the base material may contain one type of organic solvent or two or more types of organic solvents.
  • the organic solvent may include methyl ethyl ketone from the viewpoint of excellent solubility of the solid content (for example, fluororesin) of the base material.
  • the content A4 of the filler or the content of zirconium oxide particles is the total mass (including the mass of volatile matter) of the composition for ultraviolet reflection.
  • the following range may be used as a standard.
  • Content A4 is 0.1% by mass or more, 0.5% by mass or more, and 1% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance.
  • content A4 is 8% by mass or more, 8.5% by mass or more, 9% by mass or more, 9.5% by mass or more, 10% by mass or more, 10.5% by mass or more, It may be 11% by mass or more, 11.5% by mass or more, 12% by mass or more, or 12.5% by mass or more.
  • Content A4 is 30% by mass or less, 25% by mass or less, 20% by mass or less, 18% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. % or less, 15% by mass or less, 13% by mass or less, or 12.5% by mass or less. Content A4 is 12% by mass or less, 11.5% by mass or less, 11% by mass or less, 10.5% by mass or less, 10% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature. Below, it may be 9.5% by mass or less, 9% by mass or less, 8.5% by mass or less, or 8% by mass or less.
  • Content A4 is 7.5% by mass or less, 7% by mass or less, 6.5% by mass or less, 6% by mass or less, 5.5% by mass or less, 5% by mass or less, 4.5% by mass or less, or It may be 4% by mass or less. From these points of view, the content A4 is 0.1 to 30% by mass, 0.1 to 15% by mass, 0.1 to 10% by mass, 1 to 30% by mass, 1 to 15% by mass, 1 to 10% by mass. %, 3-30% by weight, 3-15% by weight, 3-10% by weight, 5-30% by weight, 5-15% by weight, or 5-10% by weight.
  • the content B4 of the base material (solid content) or the content of the fluororesin is the total mass of the composition for ultraviolet reflection (volatile content). (including mass) may be in the following range.
  • the content B4 is 0.1% by mass or more, 0.5% by mass or more, and 1% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance.
  • the content B4 may be 9% by mass or more from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Content B4 may be 9.2% by mass or more, or 9.5% by mass or more.
  • Content B4 is 30% by mass or less, 25% by mass or less, 20% by mass or less, 18% by mass, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance.
  • the content B4 may be 9% by mass or less from the viewpoint of easily obtaining a high reflectance. From these points of view, the content B4 is 0.1 to 30% by mass, 0.1 to 20% by mass, 0.1 to 10% by mass, 1 to 30% by mass, 1 to 20% by mass, 1 to 10% by mass. %, 5-30% by weight, 5-20% by weight, or 5-10% by weight.
  • the content of the hydrosilyl compound may be in the following range based on the total mass (including the mass of volatile components) of the ultraviolet reflection composition.
  • the content of the hydrosilyl compound is 0.01% by mass or more, 0.05% by mass or more, 0.01% by mass or more, 0.05% by mass or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. .1 mass% or more, 0.3 mass% or more, 0.5 mass% or more, 0.6 mass% or more, 0.8 mass% or more, 0.9 mass% or more, 1 mass% or more, 1.2 mass% % or more, or 1.4% by mass or more.
  • the content of the hydrosilyl compound is 5% by mass or less, 4.5% by mass or less, 4% by mass from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance.
  • the content may be 3.5% by mass or less, 3% by mass or less, 2.5% by mass or less, 2% by mass or less, 1.5% by mass or less, or 1.4% by mass or less.
  • the content of the hydrosilyl compound is 1.2% by mass or less, 1% by mass or less, 0.9% by mass or less, 0.8% by mass or less, 0.6% by mass or less, or 0.5% by mass or less. It's okay.
  • the content of the hydrosilyl compound is 0.01 to 5% by mass, 0.01 to 2% by mass, 0.01 to 1% by mass, 0.1 to 5% by mass, 0.1 to 2% by mass. %, 0.1-1% by weight, 0.6-5% by weight, 0.6-2% by weight, or 0.6-1% by weight.
  • the ultraviolet reflection composition according to the second embodiment is a film-like ultraviolet reflection composition.
  • the ultraviolet reflection composition according to the second embodiment can be used as an ultraviolet reflection film.
  • the composition for ultraviolet reflection according to the second embodiment can be obtained by drying the coating film of the composition for ultraviolet reflection according to the first embodiment.
  • the composition for ultraviolet reflection according to the second embodiment may be produced using a film applicator, and when a thick film is produced using the composition for ultraviolet reflection with low viscosity, it may be produced using a mold. It's fine.
  • the mass ratio of the filler, base material (solid content), and hydrosilyl compound in the ultraviolet reflection composition according to the first embodiment is the same as the ultraviolet reflection film obtained using the ultraviolet reflection composition according to the first embodiment. (ultraviolet reflection composition according to the second embodiment).
  • the average film thickness of the ultraviolet reflection composition according to the second embodiment may be in the following range.
  • the average film thickness is 10 ⁇ m or more, 30 ⁇ m or more, 50 ⁇ m or more, 70 ⁇ m or more, 80 ⁇ m or more, 100 ⁇ m or more, 120 ⁇ m or more, 150 ⁇ m or more, 180 ⁇ m or more, 200 ⁇ m or more, 210 ⁇ m or more, 230 ⁇ m or more, 250 ⁇ m or more, 270 ⁇ m or more, or 300 ⁇ m It may be more than that.
  • the average film thickness is 500 ⁇ m or less, 450 ⁇ m or less, 400 ⁇ m or less, 350 ⁇ m or less, 300 ⁇ m or less, 250 ⁇ m or less, 230 ⁇ m or less, 210 ⁇ m or less, 200 ⁇ m or less, 180 ⁇ m or less, 150 ⁇ m or less, 120 ⁇ m or less, 100 ⁇ m or less, 80 ⁇ m or less, or 70 ⁇ m It may be the following.
  • the average film thickness is 10 to 500 ⁇ m, 10 to 300 ⁇ m, 10 to 200 ⁇ m, 10 to 100 ⁇ m, 50 to 500 ⁇ m, 50 to 300 ⁇ m, 50 to 200 ⁇ m, 50 to 100 ⁇ m, 70 to 500 ⁇ m, 70 to 300 ⁇ m, It may be 70-200 ⁇ m, 70-100 ⁇ m, 100-500 ⁇ m, 100-300 ⁇ m, or 100-200 ⁇ m.
  • the average film thickness the average value of film thicknesses at five arbitrary locations can be used.
  • the content A5 of the filler or the content of zirconium oxide particles is the total volume (total volume of solid content) of the composition for ultraviolet reflection, the total volume of the filler , total volume of base material (solid content) and hydrosilyl compound, total volume of zirconium oxide particles, base material (solid content) and hydrosilyl compound, total volume of filler, fluororesin and hydrosilyl compound, or zirconium oxide It may be within the following range based on the total volume of the particles, fluororesin, and hydrosilyl compound.
  • the content A5 is 1 volume % or more, 3 volume % or more, 5 volume % or more, 8 volume % from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 9 volume % or more, 10 volume % or more, 12 volume % or more, 15 volume % or more, or 17 volume % or more. Content A5 may be 18 volume% or more, 19 volume% or more, 20 volume% or more, 22 volume% or more, 25 volume% or more, or 27 volume% or more, from the viewpoint of easily obtaining high reflectance. .
  • Content A5 is 60 volume % or less, 55 volume % or less, 50 volume % or less, 45 volume % or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, 40 volume % or less, 35 volume % or less, 30 volume % or less, or 28 volume % or less. Content A5 is 27 volume% or less, 25 volume% or less, 22 volume% or less, 20 volume% or less, 19 volume% or less, from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperature. It may be 18% by volume or less. Content A5 may be 17 volume% or less, 15 volume% or less, 12 volume% or less, or 10 volume% or less.
  • the content A5 is 1 to 60 volume%, 1 to 40 volume%, 1 to 30 volume%, 1 to 20 volume%, 5 to 60 volume%, 5 to 40 volume%, 5 to 30 volume%. %, 5-20% by volume, 10-60% by volume, 10-40% by volume, 10-30% by volume, or 10-20% by volume.
  • the content A6 of the filler or the content of the zirconium oxide particles is the total volume of the filler and the base material (solid content), the total volume of the filler and the base material (solid content), the content of the zirconium oxide particles and the content of the zirconium oxide particles. It may be in the following range based on the total volume of the base material (solid content), the total volume of the filler and the fluororesin, or the total volume of the zirconium oxide particles and the fluororesin.
  • the content A6 is 1 volume % or more, 3 volume % or more, 5 volume % or more, 8 volume % or more from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 10 volume % or more, 12 volume % or more, 15 volume % or more, 18 volume % or more, or 20 volume % or more. Content A6 may be 21 volume% or more, 22 volume% or more, 25 volume% or more, 28 volume% or more, 29 volume% or more, or 30 volume% or more from the viewpoint of easily obtaining high reflectance. .
  • Content A6 is 60 volume % or less, 55 volume % or less, 50 volume % or less, 45 volume % or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, 40 volume % or less, 35 volume % or less, or 32 volume % or less. Content A6 is 30 volume% or less, 29 volume% or less, 28 volume% or less, 25 volume% or less, 22 volume% or less, or It may be 21% by volume or less. Content A6 may be 20 volume% or less, 18 volume% or less, 15 volume% or less, or 12 volume% or less.
  • the content A6 is 1 to 60 volume%, 1 to 30 volume%, 1 to 25 volume%, 5 to 60 volume%, 5 to 30 volume%, 5 to 25 volume%, 15 to 60 volume%. %, 15-30% by volume, or 15-25% by volume.
  • the content A7 of the filler or the content of the zirconium oxide particles is the total volume of the filler and the hydrosilyl compound, or the total volume of the filler and the hydrosilyl compound, or the content of the zirconium oxide particles and the hydrosilyl compound. may be in the following range based on the total volume of .
  • Content A7 is 10 volume% or more, 15 volume% or more, 20 volume% or more, 25 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 30 volume% or more, 35 volume% or more, 40 volume% or more, 42 volume% or more, 45 volume% or more, or 48 volume% or more.
  • the content A7 may be 50 volume % or more, 55 volume % or more, 60 volume % or more, 65 volume % or more, or 70 volume % or more from the viewpoint of easily obtaining a high reflectance.
  • Content A7 may be 72% by volume or more.
  • Content A7 is less than 100 volume%, 95 volume% or less, 90 volume% or less, 85 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, 80 volume % or less, 75 volume % or less, or 72 volume % or less.
  • Content A7 is 70 volume% or less, 65 volume% or less, 60 volume% or less, 55 volume% or less, or 50 volume% or less, from the viewpoint of easily suppressing a decrease in reflectance when kept at high temperature. There may be. Content A7 may be 48 volume% or less, 45 volume% or less, or 42 volume% or less. From these viewpoints, content A7 is 10 volume% or more and less than 100 volume%, 10 to 80 volume%, 10 to 60 volume%, 30 volume% or more and less than 100 volume%, 30 to 80 volume%, 30 to 60 volume%. %, 50 volume % or more and less than 100 volume %, 50 to 80 volume %, or 50 to 60 volume %.
  • the content B5 of the base material (solid content) or the content of the fluororesin is the total volume (solid content) of the composition for ultraviolet reflection. total volume), total volume of filler, base material (solid content), and hydrosilyl compound, total volume of zirconium oxide particles, base material (solid content), and hydrosilyl compound, total volume of filler, fluororesin, and hydrosilyl compound Alternatively, it may be within the following range based on the total volume of zirconium oxide particles, fluororesin, and hydrosilyl compound.
  • Content B5 is 20 volume% or more, 25 volume% or more, 30 volume% or more, 35 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 40 volume% or more, 45 volume% or more, 50 volume% or more, 55 volume% or more, or 60 volume% or more. Content B5 may be 63 volume % or more or 65 volume % or more from the viewpoint of easily suppressing a decrease in reflectance when kept at a high temperature. Content B5 may be 68 volume% or more, 70 volume% or more, or 75 volume% or more.
  • Content B5 is less than 100 volume%, 95 volume% or less, 90 volume% or less, and 85 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, 80 volume% or less, 75 volume% or less, 70 volume% or less, 68 volume% or less, or 65 volume% or less.
  • the content B5 may be 63% by volume or less from the viewpoint of easily obtaining a high reflectance. From these viewpoints, content B5 is 20 volume% or more and less than 100 volume%, 20 to 80 volume%, 20 to 75 volume%, 60 volume% or more and less than 100 volume%, 60 to 80 volume%, 60 to 75 volume%. %, 65 volume % or more and less than 100 volume %, 65 to 80 volume %, or 65 to 75 volume %.
  • the content B6 of the base material (solid content) or the fluororesin content is the total volume of the filler and the base material (solid content). , the total volume of the zirconium oxide particles and the base material (solid content), the total volume of the filler and the fluororesin, or the total volume of the zirconium oxide particles and the fluororesin.
  • Content B6 is 30 volume% or more, 35 volume% or more, 40 volume% or more, 45 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 50 volume% or more, 55 volume% or more, 60 volume% or more, 65 volume% or more, or 68 volume% or more.
  • the content B6 may be 70 volume % or more, 75 volume % or more, or 78 volume % or more from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • Content B6 may be 80 volume% or more, 85 volume% or more, or 88 volume% or more.
  • Content B6 is less than 100 volume%, 95 volume% or less, 90 volume% or less, and 85 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, or 80 volume % or less.
  • the content B6 may be 78 volume % or less, 75 volume % or less, or 70 volume % or less from the viewpoint of easily obtaining a high reflectance.
  • content B6 is 30 volume% or more and less than 100 volume%, 30 to 95 volume%, 30 to 85 volume%, 70 volume% or more and less than 100 volume%, 70 to 95 volume%, 70 to 85 volume%. %, 75 volume % or more and less than 100 volume %, 75 to 95 volume %, or 75 to 85 volume %.
  • the content B7 is the content of the base material (solid content) or the content of the fluororesin based on the total of the base material (solid content) and the hydrosilyl compound. It may be in the following range based on the volume or the total volume of the fluororesin and the hydrosilyl compound.
  • Content B7 is 30 volume % or more, 35 volume % or more, 40 volume % or more, 45 volume % or more from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or more, 50 volume% or more, 55 volume% or more, 60 volume% or more, 65 volume% or more, 70 volume% or more, or 75 volume% or more.
  • Content B7 may be 80 volume% or more, 85 volume% or more, or 90 volume% or more. Content B7 is less than 100 volume%, 95 volume% or less, 90 volume% or less, and 85 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. % or less, or 80 volume % or less. From these viewpoints, the content B7 is 30 volume% or more and less than 100 volume%, 30 to 95 volume%, 30 to 85 volume%, 70 volume% or more and less than 100 volume%, 70 to 95 volume%, 70 to 85 volume%. %, 80 volume % or more and less than 100 volume %, 80 to 95 volume %, or 80 to 85 volume %.
  • the content of the hydrosilyl compound is the total volume of the composition for ultraviolet reflection (total volume of solid content), the filler, the base material (solid content), and the sum of the hydrosilyl compound.
  • the content of the hydrosilyl compound is 1% by volume or more, 3% by volume or more, 5% by volume or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. It may be 6 vol% or more, 7 vol% or more, 8 vol% or more, 10 vol% or more, 12 vol% or more, 13 vol% or more, 15 vol% or more, or 17 vol% or more.
  • the content of the hydrosilyl compound is 50 volume% or less, 45 volume% or less, 40 volume% or less, 35 volume% or less, 30 volume% or less, 25 volume% or less, 20 volume% or less, 17 volume% or less, 15 volume%
  • the content may be below 13% by volume, below 12% by volume, below 10% by volume, or below 8% by volume.
  • the content of the hydrosilyl compound is 1 to 50 volume%, 1 to 20 volume%, 1 to 15 volume%, 5 to 50 volume%, 5 to 20 volume%, 5 to 15 volume%, 10 to It may be 50% by volume, 10-20% by volume, or 10-15% by volume.
  • the content of the hydrosilyl compound is in the following range based on the total volume of the filler and the hydrosilyl compound, or the total volume of the zirconium oxide particles and the hydrosilyl compound. good.
  • the content of the hydrosilyl compound is 1% by volume or more, 5% by volume or more, 10% by volume or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be 15% by volume or more, 20% by volume or more, 25% by volume or more, or 28% by volume or more.
  • the content of the hydrosilyl compound is 30 volume% or more, 35 volume% or more, 40 volume% or more, 45 volume% or more, or 50 volume% from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature. It may be more than that.
  • the content of the hydrosilyl compound may be 55% by volume or more.
  • the content of the hydrosilyl compound is 80 volume% or less, 75 volume% or less, 70 volume% or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be 65% by volume or less, 60% by volume or less, or 55% by volume or less.
  • the content of the hydrosilyl compound may be 50 volume% or less, 45 volume% or less, 40 volume% or less, 35 volume% or less, or 30 volume% or less, from the viewpoint of easily obtaining a high reflectance. From these viewpoints, the content of the hydrosilyl compound is 1 to 80 volume%, 1 to 60 volume%, 1 to 50 volume%, 20 to 80 volume%, 20 to 60 volume%, 20 to 50 volume%, 30 to It may be 80% by volume, 30-60% by volume, or 30-50% by volume.
  • the content of the hydrosilyl compound is as follows based on the total volume of the base material (solid content) and the hydrosilyl compound, or the total volume of the fluororesin and the hydrosilyl compound. may be within the range of The content of the hydrosilyl compound is 1% by volume or more, 3% by volume or more, 5% by volume or more, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature and from the viewpoint of easily obtaining high reflectance. It may be 8% by volume or more, 9% by volume or more, 10% by volume or more, 12% by volume or more, or 15% by volume or more.
  • the content of the hydrosilyl compound may be 16 volume % or more, 18 volume % or more, or 20 volume % or more, from the viewpoint of easily suppressing a decrease in reflectance when maintained at a high temperature.
  • the content of the hydrosilyl compound is 50 volume% or less, 45 volume% or less, 40 volume% or less, from the viewpoint of easily suppressing the decrease in reflectance when kept at high temperature, and from the viewpoint of easily obtaining high reflectance. It may be 35% by volume or less, 30% by volume or less, or 25% by volume or less.
  • the content of the hydrosilyl compound may be 20 volume % or less, 18 volume % or less, or 16 volume % or less from the viewpoint of easily obtaining a high reflectance.
  • the content of the hydrosilyl compound may be 15% by volume or less, 12% by volume or less, 10% by volume or less, or 9% by volume or less. From these viewpoints, the content of the hydrosilyl compound is 1 to 50 volume%, 1 to 30 volume%, 1 to 20 volume%, 8 to 50 volume%, 8 to 30 volume%, 8 to 20 volume%, 10 to It may be 50% by volume, 10-30% by volume, or 10-20% by volume.
  • the laminate according to the present embodiment includes the ultraviolet reflection composition according to the second embodiment and a base material that supports the ultraviolet reflection composition.
  • the laminate according to the present embodiment may be obtained by disposing (for example, coating) the ultraviolet reflection composition according to the first embodiment on a base material and then drying the ultraviolet reflection composition, and the laminated body according to the second embodiment may be obtained by drying the ultraviolet reflection composition according to the second embodiment. It may be obtained by disposing the ultraviolet reflecting composition according to the above on a substrate.
  • the material of the base material include organic materials such as polyolefin (eg, polypropylene), polycarbonate, and acrylic resin; and inorganic materials such as glass.
  • the surface of the base material that comes into contact with the ultraviolet reflecting composition is not particularly limited, and may be a flat surface, a curved surface, an uneven surface, or the like.
  • the method for producing an ultraviolet reflecting composition according to the present embodiment includes a mixing step of mixing a filler, a base material, and a hydrosilyl compound.
  • an ultraviolet reflecting composition can be obtained by dispersing at least one selected from the group consisting of fillers and hydrosilyl compounds into the base material.
  • the method for producing an ultraviolet reflection composition according to the present embodiment may include a step of forming the ultraviolet reflection composition into a film after the mixing step.
  • the method for manufacturing a laminate according to this embodiment includes the step of bringing into contact with a base material the ultraviolet reflection composition obtained by the method for manufacturing an ultraviolet reflection composition according to this embodiment.
  • a paint was obtained by mixing the filler, resin material, and hydrosilyl compound of Table 1 or Table 2 with methyl ethyl ketone (MEK).
  • MEK methyl ethyl ketone
  • Tables 1 and 2 show the contents of filler, resin material, hydrosilyl compound, and methyl ethyl ketone in the paint (content based on the total mass of the paint including the mass of methyl ethyl ketone).
  • the ingredients used are as follows.
  • Filler Filler A: Zirconium oxide particles, manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd., trade name "UEP-100", total amount of zirconium oxide and hafnium oxide 99.8% by mass or more
  • Filler B Zirconium oxide particles, manufactured by Saint-Gobain, Product name "CY3Z-RA", total amount of zirconium oxide and hafnium oxide 94.3% by mass or more
  • Filler D Filler Filler A surface-treated with hexadecyltrimethoxysilane (manufactured by Tokyo Chemical Industry Co., Ltd.)
  • the surface treatment of filler A was performed in the following procedure. First, methanol and water were mixed at a mass ratio of 9:1, and then the pH was adjusted to 2 with dilute hydrochloric acid to obtain a mixed solution. Next, filler A was added to the above-mentioned liquid mixture, and then stirred using a stirrer to prepare a dispersion liquid. Further, a methanol solution of alkoxysilane was prepared so that the concentration of alkoxysilane (trimethoxy(propyl)silane or hexadecyltrimethoxysilane) was 13% by mass.
  • the above methanol solution of the alkoxysilane was added to the above dispersion so that the mass ratio of filler A and the alkoxysilane was 10:3. Thereafter, stirring was continued for 15 hours using a stirrer, and then the dispersion was filtered to separate the filler. After drying the filler at 23°C for 2 hours, it was heat-treated at 120°C for 10 minutes in an air atmosphere. Subsequently, a surface-treated filler (Filler C or Filler D) was obtained by crushing the coarse particles using an agate mortar.
  • the particle size D50 of the filler was measured using the following procedure. First, a dispersion treatment (pretreatment) was performed using water as a solvent and applying an output of 200 W using a homogenizer. Next, the particle size distribution was measured by a laser diffraction scattering method in accordance with JIS R1629:1997 using a product named "LS-230" manufactured by Beckman Coulter. Then, the particle size D50 was determined from the particle size distribution. The measurement results are shown in Tables 1 and 2. The particle size D50 of fillers C and D is the particle size of the filler after surface treatment.
  • Resin material A Vinylidene fluoride-hexafluoropropylene copolymer, manufactured by ARKEMA, trade name "Kynar Flex 2821-00", proportion of vinylidene fluoride monomer units 90% by mass, hexafluoropropylene monomer Unit proportion 10% by mass, weight average molecular weight 14.9 ⁇ 10 4
  • Resin material B vinylidene fluoride-hexafluoropropylene copolymer: manufactured by ARKEMA, trade name "Kynar Flex 2500-20", proportion of vinylidene fluoride monomer units 80% by mass, hexafluoropropylene monomer Unit ratio 20% by mass, weight average molecular weight 14.4 ⁇ 10 4
  • the above-mentioned weight average molecular weight of the resin material was measured by gel permeation chromatography (GPC) under the following conditions, and calculated as the molecular weight in terms of polyethylene glycol.
  • Equipment used Pump shodexDS-4 Column shodex GPC KD-806M ⁇ 2+KD-802 Detector shodex RI-101 Eluent: N,N-dimethylformamide (additive: lithium bromide 10 mmol/L)
  • Hydrosilyl compound A Methyl hydrogen silicone oil, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-99", hydrosilyl functional group equivalent: 60 g/mol, kinematic viscosity at 25°C: 20 mm 2 /sec
  • Hydrosilyl compound B Methyl hydrogen Silicone oil, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-9901”, hydrosilyl functional group equivalent: 140 g/mol, kinematic viscosity at 25°C: 20 mm 2 /sec
  • Example 1a A coating film (reflection film) was prepared using the above-mentioned paint according to the following procedure. First, a undried film was obtained by dropping a paint onto a glass substrate and applying it using a film applicator equipped with a micrometer (manufactured by Tester Sangyo Co., Ltd.). Thereafter, the laminate of the undried film and glass substrate was dried at 23° C. for 24 hours to obtain a coating film (Example 1a). Table 1 shows the contents of the filler, resin material, and hydrosilyl compound in the coating film (content based on the total solid volume of the coating film).
  • the content based on the total solid volume of the coating film was calculated based on the volume calculated by dividing the usage amount of each component by the specific gravity. Further, a coating film was obtained using a film applicator in the same manner as described above except that the clearance of the film applicator equipped with a micrometer was made smaller (Example 1b). Furthermore, after a silicone frame with a height of 3 mm was brought into close contact with the glass substrate, the above-mentioned paint was poured into the frame. Thereafter, a coating film was obtained by drying at 23° C. for 24 hours (Example 1c).
  • Examples 2 to 10 and Comparative Examples 1 to 7 Using the above-mentioned paint, a coating film was obtained using a film applicator in the same manner as in Example 1a.
  • ⁇ Coating film thickness> The average film thickness of the above-mentioned coating film was measured using a product named "Digital Indicator” manufactured by Magnescale Co., Ltd. The average value of the film thicknesses at five locations was obtained as the average film thickness. The measurement results are shown in Tables 1 and 2.
  • reflectance B reflectance after heat treatment; average value of reflectance for light with a wavelength of 270 to 280 nm
  • the reflectance maintenance rate (B/A) was calculated by dividing the reflectance B by the reflectance A. Tables 1 and 2 show the measurement results of reflectance and the retention rate of reflectance.

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001240524A (ja) * 2000-02-29 2001-09-04 Asahi Pretec Corp 日焼け止め化粧料
JP2010248484A (ja) * 2009-03-23 2010-11-04 Admatechs Co Ltd 紫外線反射組成物及び紫外線反射成形品
JP2014205811A (ja) * 2013-04-16 2014-10-30 国立大学法人東北大学 紫外線遮蔽膜
WO2014200112A1 (ja) * 2013-06-14 2014-12-18 東レ・ダウコーニング株式会社 反応性シリコーン組成物、反応性熱可塑体、硬化物、および光半導体装置
JP2019151710A (ja) * 2018-03-01 2019-09-12 住友化学株式会社 シリコーン樹脂組成物および積層体
CN110685031A (zh) * 2019-10-31 2020-01-14 宁波瑞凌新能源科技有限公司 辐射制冷纤维及其制备方法、应用

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001240524A (ja) * 2000-02-29 2001-09-04 Asahi Pretec Corp 日焼け止め化粧料
JP2010248484A (ja) * 2009-03-23 2010-11-04 Admatechs Co Ltd 紫外線反射組成物及び紫外線反射成形品
JP2014205811A (ja) * 2013-04-16 2014-10-30 国立大学法人東北大学 紫外線遮蔽膜
WO2014200112A1 (ja) * 2013-06-14 2014-12-18 東レ・ダウコーニング株式会社 反応性シリコーン組成物、反応性熱可塑体、硬化物、および光半導体装置
JP2019151710A (ja) * 2018-03-01 2019-09-12 住友化学株式会社 シリコーン樹脂組成物および積層体
CN110685031A (zh) * 2019-10-31 2020-01-14 宁波瑞凌新能源科技有限公司 辐射制冷纤维及其制备方法、应用

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