JP2006335041A - Substrate material with coating film, manufacturing method of substrate material with coating film, lightening equipment and lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate material with a coating film on which the coating film with a low absorbance of a visible rays, at the same time, capable of cutting most ultraviolet ray in a wave length range of 300-405 nm, suppressing a generation of yellowish coloring and a bleeding out of an ultraviolet ray absorbing agent and further having a high durability/weatherability. <P>SOLUTION: The coating film 3 is provided with a substrate layer 1 obtained by dispersing the ultraviolet ray absorbing agent in a light translucent resin used as a binder and a coated layer 2 formed by the light translucent resin and laminated on the outside of the substrate layer 1 on a surface of a substrate 4. The light translucent resin used in the substrate layer 1 or the coated layer 2 preferably comprises one having a benzotriazole-based UV-absorbing group in the molecular skeleton, while the ultraviolet ray absorbing agent contained as being dispersed in the substrate layer is preferably at least one selected from benzotriazole-based compounds, hydroxyphenyltriazine-based compounds or also benzotriazole-based compounds containing a chlorine group and tris-resorcinol triazine-based compounds. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a base material with a coating film that forms a coating film that suppresses the transmission of ultraviolet rays and sufficiently maintains the transmittance of visible light, a method for producing the base material with a coating film, and the base material with a coating film. The present invention relates to a lighting fixture and a lamp manufactured using the same.

  Conventionally, the UV light emitted from the light source is cut by creating a cover for the lighting fixture with a base material coated with a paint obtained by mixing inorganic fine powder or organic UV absorber in a transparent binder, etc. Attempts have been made to suppress attracting insects. In such a case, in order to sufficiently suppress the attraction of insects without affecting the performance as a lighting fixture, as a coating film of a substrate with a coating film, (1) no yellowing, (2) Conditions such as cutting most of ultraviolet light in the wavelength range of 300 to 405 nm, (3) excellent durability and weather resistance, and (4) high transmittance of light in the visible light range (particularly near 555 nm wavelength). Is required.

Here, as a coating material for forming the coating film as described above, Patent Document 1 discloses a coating material for window glass in which fine zinc oxide powder having a particle size of 0.1 μm or less is dispersed in a binder. . Patent Document 2 discloses a window glass paint containing a benzophenone-based ultraviolet absorber. Patent Document 3 discloses a super-weather resistant coating composition in which an acrylic resin having a hindered amine light stabilizing group, a silane coupling agent, and a non-yellowing type polyisocyanate are blended.
JP 05-096948 A JP 61-138664 A Japanese Patent No. 3516833

  However, just mixing the inorganic fine powder as in Patent Document 1 described above causes problems such as yellowing of the coating film and low visible light transmittance, as in Patent Document 2. Incorporating a benzophenone-based UV absorber into the light source will cause insufficient absorption of long-wavelength UV light, insufficient durability and light resistance will be obtained, and absorption performance will deteriorate due to bleeding out of the UV absorber. There was a problem.

  It is also conceivable to use a UV-absorbing resin in which a UV-absorbing group is incorporated into the resin skeleton by copolymerizing a resin and an UV-absorbing agent, but this can prevent bleeding out of the UV-absorbing agent. Since the amount of the ultraviolet absorbing group that can be incorporated therein is limited, it has been difficult to provide sufficient absorption capability particularly for long wavelength ultraviolet rays having a wavelength of about 370 to 405 nm.

  The present invention has been made in view of the above points, and has a low visible light absorptivity and can cut most of ultraviolet rays in a wavelength region of 300 to 405 nm. The object of the present invention is to provide a coating-coated substrate in which a bleed-out of the agent is suppressed and a coating film having high durability and weather resistance is formed, and a production method thereof. An object of the present invention is to provide a lighting fixture and a lamp manufactured using the same.

  The base material with a coating film according to the present invention is formed on the surface of the base material by dispersing a UV absorber in a light-transmitting resin serving as a binder, and laminated on the outside of the base layer and formed from the light-transmitting resin. It is characterized by providing a coating film provided with a coated layer.

  The translucent resin that serves as a binder for the base layer preferably has a benzotriazole-based ultraviolet absorbing group in the molecular skeleton, and the UV absorber dispersed and contained in the base layer includes a benzotriazole-based compound and a hydroxy group. It is preferably at least one selected from phenyltriazine compounds, or at least one selected from benzotriazole compounds having a chloro group and trisresorcinol triazine compounds.

  In the present invention, it is essential that the resin used for the base layer of the coating film is light-transmitting, and by using a light-transmitting resin containing a benzotriazole-based UV absorbing group in the molecular skeleton, ultraviolet rays dispersed in the base layer are used. The usage-amount of an absorber can be suppressed. The translucent resin containing a benzotriazole-based UV absorbing group in the molecular skeleton has a high UV-absorbing property, and is selected from a benzotriazole-based compound and a hydroxyphenyltriazine-based compound, or has a chloro group. By using an ultraviolet absorber selected from a compound and a trisresorcinol triazine compound in combination, a higher ultraviolet absorbing ability can be provided, and sufficient absorbing ability can be secured even for long wavelength ultraviolet rays. The film has an excellent ultraviolet absorptivity in the wavelength region of 300 to 380 nm and also has a sufficiently high absorptivity for long wavelength ultraviolet rays of 370 to 405 nm. Moreover, the light absorbency in the wavelength range of 405-450 nm of the benzotriazole type | system | group ultraviolet absorption group and ultraviolet absorber contained in this coating film is low. For this reason, yellowishness does not generate | occur | produce in the light which permeate | transmits this coating film. In addition, this ultraviolet absorber has good compatibility with the resin, and when a translucent resin containing a benzotriazole-based ultraviolet absorbing group is used in its molecular skeleton, the ultraviolet absorbing group contained in the resin skeleton is used. The compatibility of the UV absorber is further improved due to the presence of the UV absorber, which stabilizes the UV absorber and prevents the UV absorber from being decomposed or coming out of the coating film. The light resistance is excellent.

  In the present invention, it is essential that the coating layer of the coating film is made of a translucent resin. More preferably, by using a translucent resin containing a benzotriazole-based UV-absorbing group in the molecular skeleton, it is possible to apply a UV absorber dispersed in the base layer while maintaining the UV-absorbing ability without impairing transparency. Precipitation on the film surface and removal of the UV absorber from the coating film can be prevented. Furthermore, by using a translucent resin containing a benzotriazole-based UV-absorbing group in the molecular skeleton, it becomes possible to maintain UV-absorbing performance in the coating layer, resulting in improved durability and tackiness of the coating film. Can be achieved.

In the present invention, the content of the ultraviolet absorber dispersed in the base layer is preferably set to be in the range of 0.05 to 10.0 g per 1 cm ³ of the coating film. When the content of the ultraviolet absorber is less than 0.05 g with respect to 1 cm ^{3 of the} coating film, the ultraviolet absorbing ability in the wavelength region of 370 to 405 nm becomes insufficient, and conversely when it exceeds 10.0 g, The amount of the ultraviolet absorber is too large, and the film formability is lowered.

In the present invention, at least one of the base layer and the coating layer preferably contains at least one kind of inorganic fine particles selected from zinc oxide, titanium oxide, cerium oxide and iron oxide, and further improves the ultraviolet absorbing ability of the coating film. It can be made to. The content of the inorganic fine particles is preferably set to be in the range of 0.005 to 0.5 g per 1 cm ³ of the coating film. If it is less than this range, visible light will be transmitted too much, and if it exceeds this range, it will be difficult to transmit visible light.

  Moreover, in this invention, it is preferable that the film thickness of a base layer is 2-50 micrometers, and the film thickness of a coating layer is 5-70 micrometers. If the thickness of the base layer is less than 2 μm, the amount of the UV absorber present in the translucent resin is too small, making it difficult to obtain the desired optical characteristics. Therefore, it is difficult to form a film, and productivity may be deteriorated. Moreover, when the film thickness of the coat layer is less than 5 μm, it is insufficient to prevent the ultraviolet absorber from falling out of the base layer and deposition of the ultraviolet absorber on the coating surface, and the role as the coat layer is sufficient. On the contrary, if the film thickness exceeds 70 μm, it is difficult to form a film by one application, and the productivity may be deteriorated.

  In addition, the above-mentioned base layer and coat layer are made of translucent resin such as acrylic resin, alkyd resin, polycarbonate resin, polyurethane resin, epoxy resin, melamine resin, diethylene glycol bisallyl carbonate resin, acrylonitrile-styrene copolymer, methyl methacrylate-styrene copolymer. Those selected from a polymer, a polyethylene resin, a polystyrene resin, an olefin resin, and an alloy material containing these as a main component are preferable. Since these have high translucency, they are particularly suitably used for lighting fixtures. Among these, acrylic resins, alkyd resins, melamine resins, and alloys thereof are particularly preferable as those having excellent durability.

  In the method for producing a substrate with a coating film according to the present invention, a base layer is formed by applying and curing a coating composition for a base layer containing a translucent resin as a binder, an isocyanate, and an ultraviolet absorber on the substrate. A coating layer having a base layer and a coating layer is prepared by applying and curing a coating composition for the coating layer containing a translucent resin and an isocyanate on the base layer to prepare a coating layer. It is characterized by being laminated on.

  In the base material with a coating film obtained by manufacturing in this way, the coating film has a two-layer structure of a base layer and a coating layer, whereby light transmitted through the base material or reflected by the base material is used. It can cut most of ultraviolet rays in the wavelength region of 300 to 405 nm, absorbs almost no visible light, and prevents insects from being attracted by ultraviolet rays. Is less prone to yellowing, and is less likely to cause precipitation of the UV absorber on the coating film surface or from the coating film, and has higher durability and weather resistance. Since the coating composition for the base layer and the coating composition for the coat layer contain isocyanate, the long-term storage and handling properties of these coating compositions are improved.

  In addition, the coating composition for the base layer and the resin composition for the coat layer preferably contain a silane coupling agent, which can improve the adhesion of the coating film, and also improve the alkali resistance and boiling resistance of the coating film. The durability and the like can be further improved by improving the properties and the like.

  The lighting fixture which concerns on this invention comprises the translucent member produced using said base material with a coating film, It is characterized by the above-mentioned.

  Thereby, when the light emitted from the light source of the lighting fixture passes through the translucent member on which the coating film is formed, most of the ultraviolet rays in the wavelength region of 300 to 405 nm are cut and visible light passes. It is possible to prevent insects from being attracted by ultraviolet rays, and the coating film is less prone to yellowing, and further, precipitation and removal of UV absorbers on the coating film surface are difficult to occur, and high durability. And weather resistance.

  Moreover, the other lighting fixture which concerns on this invention comprised the light source provided with the translucent member produced using said base material with a coating film as an outline.

  Thereby, when the light emitted from the light source of the lighting fixture passes through the outer shell on which the coating film is formed, most of the ultraviolet rays in the wavelength region of 300 to 405 nm are cut and visible light passes. In addition, it is possible to prevent insects from being attracted by ultraviolet rays, and the coating film is less susceptible to yellowing, and moreover, the UV absorber is less likely to precipitate or come off from the coating surface, resulting in high durability and It has weather resistance.

  Still another lighting fixture according to the present invention is characterized by including a reflecting member produced using the above-mentioned substrate with a coating film.

  Thereby, when the light emitted from the light source of the luminaire is reflected by the reflecting member on which the coating film is formed, most of the ultraviolet rays in the wavelength region of 300 to 405 nm are cut and visible light passes. It is possible to prevent insects from being attracted by ultraviolet rays, and the coating film is less prone to yellowing, and further, precipitation and omission of the UV absorber on the coating film surface is less likely to occur. It has durability and weather resistance.

  The lamp | ramp which concerns on this invention is equipped with the translucent member produced using said base material with a coating film as an outline, It is characterized by the above-mentioned.

  As a result, when the light emitted from the lamp passes through the outer shell on which the coating film is formed, most of the ultraviolet light in the wavelength region of 300 to 405 nm is cut, and visible light passes through the outer surface. Insects can be prevented from being attracted, and the paint film is less susceptible to yellowing, and the UV absorber is less likely to precipitate or come off from the paint film surface, providing high durability and weather resistance. It is to be prepared.

  According to the present invention, the absorption factor of visible light is low, and most of ultraviolet rays in the wavelength region of 300 to 405 nm can be cut, so that insects are not attracted by ultraviolet rays, and visible. Light can be transmitted. In addition, the coating film hardly generates yellowishness, hardly deposits on the surface of the UV absorber and does not easily come off, and has high durability and weather resistance.

  Hereinafter, the best mode for carrying out the present invention will be described.

  The base material with a coating film according to the present invention is formed by applying and curing a base layer coating composition containing a translucent resin as a binder and an ultraviolet absorber on the surface of the base material, and further forming a base layer. A coating composition comprising a base layer and a coating layer is laminated on the surface of a substrate by applying and curing a coating composition for the coating layer containing a functional resin on the surface of the base layer to form a coating layer. The base layer contains a translucent resin and an ultraviolet absorber as essential components, and the coat layer contains the translucent resin as essential components.

  As the light-transmitting resin contained in the coating composition for the base layer and the coating composition for the coat layer, appropriate ones are used, and in particular, acrylic resins (including isocyanate-curable acrylic resins), alkyd resins , Polycarbonate resin, polyurethane resin, epoxy resin, melamine resin, diethylene glycol bisallyl carbonate resin, acrylonitrile-styrene copolymer, methyl methacrylate-styrene copolymer, polyethylene resin, polystyrene resin, olefin resin, and these as main components An alloy material or the like is preferably used, and one of these may be used alone, or two or more may be used in combination. Among these, acrylic resins, alkyd resins, melamine resins, and alloys thereof are particularly preferable as those having excellent durability.

  Moreover, as a translucent resin, what has a benzotriazole type ultraviolet absorption group in the molecular skeleton can also be used. Specific examples of such a translucent resin containing a benzotriazole-based ultraviolet absorbing group in the skeleton include those obtained by introducing a benzotriazole-based ultraviolet absorbing group into an acrylic resin. For example, 2- [2′- Hydroxy-5 ′-(methacryloyloxymethyl) phenyl] -2H-benzotriazole, 2- [2′-hydroxy-5 ′-(methacryloyloxyethyl) phenyl] -2H-benzotriazole, 2- [2′-hydroxy- Benzotriazole such as 5 ′-(methacryloyloxypropyl) phenyl] -2H-benzotriazole, and unsaturated monomers such as cyclohexyl (meth) acrylate, methylcyclohexyl (meth) acrylate, and t-butylcyclohexyl (methacrylate) Can be mentioned.

  Examples of the ultraviolet absorber contained in the coating composition for the base layer include benzotriazole compounds, hydroxyphenyltriazine compounds, and trisresorcinol triazine compounds.

  Examples of the benzotriazole compounds include 2- (2-hydroxy-5-t-butylphenyl) -2H-benzotriazole (for example, trade name “Tinuvin PS” manufactured by Ciba Specialty Chemicals), 2- (2H-benzo Triazol-2-yl) -4,6-di-t-pentylphenol (for example, trade name “Tinuvin 328” manufactured by Ciba Specialty Chemicals), 2- (2H-benzotriazol-2-yl) -4, 6-bis (1-methyl-1-phenylethyl) phenol, α- [3- [3- (2H-benzotriazol-2-yl) -5- (1,1-dimethylethyl) -4-hydroxyphenyl] -1-oxopropyl] -ω-hydroxypoly (oxo-1,2-ethanediyl) (for example, trade name “Ciba Specialty Chemicals” Tinuvin 1130 ") and the like.

  Examples of the benzotriazole compound include those having a chloro group. Specific examples of the benzotriazole-based compound having such a chloro group include octyl-3- [3-t-butyl-4-hydroxy5- (5-chloro-2H-benzotriazol-2-yl) phenyl. ] Propionate (for example, “Tinuvin 109” manufactured by Ciba Specialty Chemicals), 2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (t-butyl) phenol (For example, trade name “Tinuvin 326” manufactured by Ciba Specialty Chemicals), 2,4-di-t-butyl-6- (5-chlorobenzotriazol-2-yl) phenol (for example, Ciba Specialty Chemicals) The product name “Chinubin 327”) and the like can be mentioned.

  Moreover, as a hydroxyphenyl triazine type compound, 2- [4-[(2-hydroxy-3-dodecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl)- 1,3,5-triazine, 2- [4-[(2-hydroxy-3-tridecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (4,6-bis (2,4 -Dimethylphenyl) -1,3,5-triazine, 2,4-bis (2,4-dimethylphenyl) -6- (2-hydroxy-4-iso-octylphenyl) -s-triazine and the like. As a commercially available product, trade name “Tinuvin 400” (2- [4-[(2-hydroxy-3-dodecyloxypropyl) oxy]-, manufactured by Ciba Specialty Chemicals Co., Ltd., is available. -Hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine and 2- [4-[(2-hydroxy-3-tridecyloxypropyl) oxy] -2 -Hydroxyphenyl] -4,6-bis (mixture with 4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine), “Tinuvine 411L” (2,4-bis (2, 4-dimethylphenyl) -6- (2-hydroxy-4-iso-octylphenyl) -s-triazine) and the like.

  Further, examples of the trisresorcinol triazine compound include isooctyl substituted trisresorcinol triazine (for example, “CGL777” manufactured by Ciba Specialty Chemicals), t-butyl substituted trisresorcinol triazine, cumyl substituted trisresorcinol triazine, and the like. .

  The coating composition contains an organic solvent as necessary. Examples of the organic solvent include aromatic hydrocarbons such as xylene, toluene, benzene, ethylbenzene, and solvent naphtha; ester organic solvents such as ethyl acetate, propyl acetate, and butyl acetate; ethanol, isopropyl alcohol, n-propanol, n-butanol, Examples thereof include alcohol-based organic solvents such as n-pentanol and n-hexanol.

  In a preferred embodiment, the coating composition for the base layer comprises a translucent resin, more preferably a translucent resin containing a benzotriazole-based ultraviolet absorbing group in the molecular skeleton, a benzotriazole-based compound, and a hydroxyphenyltriazine. It contains at least one ultraviolet absorber selected from the series compounds.

  As in this embodiment, when the translucent resin forming the base layer of the coating film contains a benzotriazole-based UV absorbing group in its molecular skeleton, the amount of UV absorber used is suppressed and the UV light from the coating film is reduced. The bleed-out of the absorbent can be suppressed. The translucent resin containing a benzotriazole-based UV-absorbing group in the molecular skeleton has a high UV-absorbing property in a wavelength region of 300 to 405 nm, and is at least selected from a benzotriazole-based compound and a hydroxyphenyltriazine-based compound. By using a kind of ultraviolet absorber in combination, it is possible to provide a higher ultraviolet absorption capability and to ensure sufficient absorption capability for long-wavelength ultraviolet rays, whereby the base layer of the coating film is 300 to 380 nm. In addition to having an excellent ultraviolet absorptivity in the wavelength region, it also has a sufficiently high absorptivity for long wavelength ultraviolet rays of 370 to 405 nm. Furthermore, ultraviolet absorbers such as benzotriazole-based UV-absorbing groups, benzotriazole-based compounds, and hydroxyphenyltriazine-based compounds have low light absorbability in the wavelength range of 405 to 450 nm.

  In addition, in the coat layer, by using a translucent resin containing a benzotriazole-based ultraviolet absorbing group in the molecular skeleton, the coat layer has high ultraviolet absorptivity in the wavelength region of 300 to 405 nm. By adjusting the film thickness to 5 to 70 μm as described above, precipitation of the UV absorber from the base layer onto the coating film surface and removal of the UV absorber from the coating film can be prevented. And light resistance can be improved.

  And the coating film which consists of a base layer and a coat layer in this way has a sufficiently high absorption ability for long wavelength ultraviolet rays of 370 to 405 nm as well as excellent ultraviolet absorption ability in the wavelength range of 300 to 380 nm, And since the light absorptivity in a wavelength range of 405-450 nm is a low thing, yellowing does not generate | occur | produce in the light which permeate | transmits a coating film. In addition, the above ultraviolet absorber is compatible with the translucent resin used in the base layer, and the compatibility is further improved by the presence of the ultraviolet absorbing group contained in the resin skeleton. Is stabilized, and it is difficult for the UV absorber to decompose and to escape from the coating film. Further, since the coating layer is provided on the base layer, the coating film maintains the desired optical characteristics. The durability and light resistance of the glass will be even better.

  Here, in the translucent resin containing the benzotriazole-based ultraviolet absorbing group in the molecular skeleton in the coating composition of the base layer and the coat layer, the content of the benzotriazole-based ultraviolet absorbing group is the resin solid of the translucent resin. It is preferable that it is the range of 0.5-60 mass% with respect to a minute. When the amount is less than 0.5% by mass, the ultraviolet absorbing ability cannot be sufficiently obtained. When the amount exceeds 60% by mass, the ultraviolet absorber may be deposited on the surface of the coating film.

  The ultraviolet absorber is selected from a benzotriazole compound and a hydroxyphenyltriazine compound as described above, and one or more of them can be used. In the product, the content of the ultraviolet absorber is preferably in the range of 50 to 400% by mass with respect to the solid content of the translucent resin. If it is less than 50% by mass, the ultraviolet absorbing ability is not sufficient, and if it exceeds 400% by mass, the film forming property may be deteriorated.

  Furthermore, the content of the organic solvent contained in the coating composition for the base layer and the coating composition for the coating is appropriately adjusted as necessary, but is preferably based on the total amount of the coating composition excluding the organic solvent. It is preferable to set it as the range of 20-100 mass%.

  In another preferred embodiment, the coating composition for the base layer comprises a translucent resin, more preferably a translucent resin containing a benzotriazole-based ultraviolet absorbing group in the molecular skeleton, and a benzotriazole having a chloro group. And at least one UV absorber selected from a trisresorcinol triazine compound, and the coating composition for the coating layer has a translucent resin, more preferably a benzotriazole UV absorbing group. It contains a translucent resin contained in the molecular skeleton.

In the present embodiment, the benzotriazole-based compound or trisresorcinol triazine-based compound having a chloro group has a high absorption ability in a wide wavelength region of the ultraviolet region, and such an ultraviolet absorber is applied to the coating film 1 cm ³ . On the other hand, since it is contained in the range of 0.05 to 10.00 g, the coating film has a high ultraviolet absorbing ability in the wavelength region of 300 to 380 nm, and also has a sufficient absorbing ability for long wavelength ultraviolet rays of 370 to 405 nm. It will have. If the content of this ultraviolet absorber is less than 0.05 g, the absorbability of ultraviolet light in the wavelength range of 300 to 405 nm is not sufficient, and if it exceeds 10.00 g, yellowishness occurs, There is a risk of precipitation on the surface.

  In addition, the benzotriazole-based compound having a chloro group and the trisresorcinol triazine-based compound contained in the coating film formed with this coating composition have low light absorption in the wavelength region of 405 to 450 nm. Yellow light is not generated in the light transmitted through the coating film. In addition, the compatibility between these ultraviolet absorbers and the resin is good, and the ultraviolet absorber is not easily decomposed or detached from the coating film, so that it is excellent in durability and light resistance and bleed-out is suppressed.

  The translucent resin may contain a benzotriazole-based ultraviolet absorbing group in the skeleton, or may not contain this in the skeleton. In the case of using a benzotriazole-based ultraviolet absorbing group in the skeleton, it is expected that the ultraviolet absorbing ability in the wavelength range of 370 to 405 nm of the coating film is further improved.

  In addition, the content of the organic solvent to be contained is adjusted as needed, but preferably it is in the range of 20 to 100% by mass with respect to the total amount of the coating composition excluding the organic solvent. It is.

  The base layer coating composition and the coating layer coating composition in each of the above embodiments may contain an isocyanate. By containing isocyanate in this way, the long-term storage stability and handling properties of the coating composition are improved.

  Isocyanate is not particularly limited, but ethyl isocyanate, tolylene diisocyanate, phenyl isocyanate, 2,4-tolylene diisocyanate, hexamethylene diisocyanate, hydrogenated hexamethylene diisocyanate, octadecyl isocyanate, 1,5-naphthalene diisocyanate dimethyl Examples thereof include diisocyanates, derivatives thereof, modified products, and polyisocyanates having a higher isocyanate branch density.

  Moreover, blocked isocyanate can also be used as isocyanate. Blocked isocyanate is composed of isocyanate compounds such as 4,4'-diphenylmethane diisocyanate, tolylene 2,4-diisocyanate, polymethylene polyphenyl diisocyanate, hexamethylene diisocyanate, polymeric isocyanate, phenols, tertiary alcohols, secondary The isocyanate group of the polyisocyanate compound is blocked by reacting a blocking agent such as alcohol.

  Here, the content of isocyanate is appropriately adjusted, but the ratio of (number of hydroxyl groups) :( number of isocyanate groups) in the coating composition is in the range of 1: 0.5 to 1: 1.5. If it is less than this range, the transparency of the translucent resin may be insufficient and sufficient durability may not be obtained. May be insufficient.

  Moreover, the coating composition for the base layer and the coating composition for the coat layer in each of the above embodiments may contain at least one kind of inorganic fine particles selected from zinc oxide, cerium oxide, titanium oxide, and iron oxide. . These inorganic fine particles can give an appropriate color to the coating film by adjusting the type and content to be used, and the inorganic fine particles have an ultraviolet absorbing ability, and the ultraviolet absorbing ability of the coating film. Can be improved. At this time, when zinc oxide, cerium oxide, and titanium oxide are contained, the ultraviolet absorption ability in the wavelength region of 300 to 380 nm can be improved, and when iron oxide is contained, the wavelength of 370 to 405 nm is particularly preferred. The ultraviolet absorptivity in the region can be improved.

This content of the inorganic fine particles is appropriately adjusted, it is preferably in the range of coating film 1 cm ³ per 0.005 to 0.5 / cm ^3. If it is less than 0.005 g / cm ^3, there is a problem that the visible light since the function to color the coating film becomes insufficient too transparent and hardly transmitted visible light exceeds 0.5 g / cm ³ Thus, the desired optical characteristics cannot be obtained.

  Moreover, you may make it contain the silane coupling agent in the coating composition for base layers in the said each embodiment, and the coating composition for coat layers. In this case, when the coating composition is applied to the surface of the substrate to form a coating film, the adhesion between the substrate and the coating film can be improved, and in particular, the coating film is formed on the glass substrate. The adhesion during the process can be greatly improved. Moreover, it becomes possible to improve the alkali resistance of the coating film, the boiling resistance, etc., and to further improve the durability of the coating film. A suitable silane coupling agent can be used, but trifunctional silicon alkoxide is preferably used. For example, γ-ureidopropyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltri Ethoxysilane, vinyltriethoxysilane, γ-methacryloxypropyltriethoxysilane, N-β (aminoethyl) γ-aminopropyltriethoxysilane, γ-chloropropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, etc. be able to.

  The content of the silane coupling agent is appropriately adjusted, but it is particularly preferable that the content of the translucent resin with respect to the solid content is in the range of 0.5 to 20% by mass, which is less than this range. In such a case, the alkali resistance and boiling resistance cannot be sufficiently improved, and if it exceeds this range, appearance defects such as loss of gloss of the coating film may occur.

  In addition to the above-mentioned components, the coating composition for the base layer and the coating composition for the coat layer may contain pigments and other additives as necessary. For example, silica powder, ceramic Powders, metal powders, organic dyes, inorganic pigments, fluorescent dyes, light stabilizers, antioxidants, thixotropic agents, leveling agents, antifoaming agents, anti-repellent agents and the like can be contained.

  The coating composition for the base layer and the coating composition for the coat layer can be obtained by blending the above components and stirring and mixing them. In this case, for example, in the case of a coating composition for a base layer, first, the first agent is prepared by stirring and mixing while adding an ultraviolet absorber to a translucent resin to which blocked isocyanate or inorganic fine particles are added as necessary. On the other hand, a second composition is prepared by stirring and mixing an organic solvent containing a silane coupling agent as required, and a paint composition is prepared by mixing and mixing the first and second agents. You can get things.

  As shown in FIG. 1, the base material with a coating film according to the present invention is formed by applying and curing a base layer coating composition on the surface of the base material to form the base layer 1, and further forming a coating composition for the coating layer. By applying and curing on the surface of the base layer 1 to form the coat layer 2, the coating layer 3 composed of the base layer 1 and the coat layer 2 is laminated on the surface of the substrate 4. Here, the curing of the coating composition for the base layer means that the coating composition for the base layer is applied to the substrate, and is at a temperature between room temperature (20 ° C.) and 200 ° C., more preferably between 50 ° C. and 200 ° C. The curing of the coating composition for the coating layer means that the coating composition for the base layer is applied to a substrate with a base layer, and is room temperature (20 ° C.) to 200 ° C., more preferably. It means curing at a temperature between 50 ° C and 200 ° C.

  Although a suitable thing can be used as a base material, Usually, what has translucency is used. In the case of forming a reflecting member or the like, an opaque base material is used.

  For example, a transparent member such as a glass or resin lamp cover (cover for a lighting fixture) that covers a light source (lamp) of a lighting fixture is applied as a base material, and the lamp cover is colored or coated. A coating film can be formed with the above coating composition. In this case, the light irradiated through the translucent member from the light source passes through the coating film formed of the coating composition, so that the ultraviolet light in the range of 300 to 405 nm is almost cut off and visible. The light is transmitted, so that it is possible to prevent insects from being attracted by ultraviolet rays. In addition, yellowishness is hardly generated in this coating film, and bleeding out of the ultraviolet absorber is not easily generated, and the coating film has higher durability and weather resistance.

  The coating film of the substrate with a coating film according to the present invention has a two-layer structure of a base layer and a coating layer as described above, and the film thickness when forming the coating film is in the range of 2 to 50 μm in the base layer. is necessary. If the thickness is less than 2 μm, the desired ultraviolet absorbing ability cannot be obtained, and if it exceeds 50 μm, there is a problem that the film forming property is deteriorated. Also, the film thickness of the coat layer needs to be in the range of 5 to 70 μm, and if it is less than 5 μm, it prevents precipitation of the UV absorber blended in the base layer onto the coating surface or from the UV absorber coating film. Insufficient to prevent the film from coming off, and when it exceeds 70 μm, there is a problem that the film forming property is deteriorated and the productivity is deteriorated.

  The substrate is not limited to the lamp cover as described above, and includes, for example, outer walls, tiles, etc .; various glass plates and resin plates such as signboards, instruction boards, stickers, window glass, displays; metal plates; Glass or resin filter, UV cut filter, etc .; using a glass or resin accessory such as a watch, case, or bead as a base material. A coating film can be formed with such a coating composition.

  Moreover, the lighting fixture which concerns on this invention is equipped with the translucent member produced with the base material with a coating film by which the above coating compositions were apply | coated.

  As a translucent member of a lighting fixture, a cover (lamp) such as a globe, a filter, etc., which is formed of a transparent resin or transparent glass, covering the periphery of a light source (lamp) in a ceiling light, a street light, an exterior lighting fixture, etc. Cover). Moreover, a cover, a filter, etc. which cover the lower surface of a fluorescent lamp provided with a straight tube fluorescent lamp as a light source can also be mentioned.

  When a coating film is formed on the translucent member of such a lighting fixture with the coating composition as described above, the light emitted from the light source passes through the coating composition coating when passing through the translucent member. By this, ultraviolet rays in the range of 300 to 405 nm are cut, and insects can be prevented from being attracted.

  In addition, as a translucent member of a luminaire, there is a translucent member that constitutes the outline of a light source (lamp) such as a glass tube in a fluorescent lamp, a glass bulb in a mercury lamp, a metal halide lamp, a light bulb, and the like. You may make it form the coating film of the above coating compositions on an optical member. In this way, the light emitted from the light source passes through the coating film of the coating composition as described above when passing through the outline of the light source, so that ultraviolet rays in the range of 300 to 405 nm are cut, and insects are attracted. It is possible to prevent this. At this time, since the ultraviolet rays of the light emitted from the light source are cut without covering the entire light source with a cover, even if a lighting fixture is formed so that the light source is exposed to the outside, the attraction of insects is suppressed. Is possible.

  Moreover, it is also preferable to apply said coating composition to the reflective member of a lighting fixture. That is, a coating composition on the surface of a reflecting member such as a reflecting plate covering the upper surface side of a light source such as a fluorescent lamp or a reflecting plate in an indirect lighting device in a lighting device such as a fluorescent lamp installed on a ceiling surface Is applied. If it does in this way, when the light emitted from the light source will reflect a reflective member, 300-405 nm ultraviolet rays will be absorbed by the coating film of a coating composition, and this suppresses attraction of an insect. It is possible.

  Next, the present invention will be specifically described with reference to examples.

(Examples 1-6 and Comparative Examples 1-3, Reference Examples 1-2)
The first agent for the base layer was prepared by stirring the translucent resin, ultraviolet absorber, and isocyanate listed in Tables 1 to 4 at 300 rpm for 30 minutes.

  Moreover, the 1st agent for coating layers was adjusted by agitating the translucent resin of Table 1 and Table 4, and isocyanate for 30 minutes at 300 rpm.

  Furthermore, 45 parts by mass of xylene, 50 parts by mass of n-butanol, and 5 parts by mass of γ-ureidopropyltriethoxysilane were blended, and this was stirred at 500 rpm for 5 minutes to obtain the second agent for the base layer and the coating layer. Was prepared.

  And the 1st agent and 2nd agent for base layers are mixed by the mass ratio of 2: 1, this is stirred for 10 minutes at 500 rpm with a screw stirrer, For base layers which have the composition shown in Tables 1-4 A coating composition was prepared. Similarly, the first agent and the second agent for the coating layer were mixed at a mass ratio of 1: 1, and this was stirred with a screw stirrer at 500 rpm for 10 minutes. A coating composition for a coat layer having the composition shown in 4 was prepared.

  In Tables 1 to 4, “UV-6010” is a translucent resin containing a benzotriazole-based UV-absorbing group manufactured by Nippon Shokubai Co., Ltd., and “S-2818” is a translucent resin manufactured by Nippon Shokubai Co., Ltd. “Tinuvin 109” is a chloro group-containing benzotriazole compound (octyl-3- [3-t-butyl-4-hydroxy5- (5-chloro-2H-benzotriazole) manufactured by Ciba Specialty Chemicals. -2-yl) phenyl] propionate), “CGL777” is an isooctyl-substituted trisresorcinol triazine manufactured by Ciba Specialty Chemicals, and “BL3175” is a blocked isocyanate manufactured by Sumika Bayer Urethane.

(Transmissivity test)
The base layer coating composition prepared as described above is spray-coated on a flat glass, heat treated at 180 ° C. for 30 minutes in a blast constant temperature dryer to form a base layer, cooled to room temperature, and then coated for a coating layer. The coating composition was spray-coated on a flat glass with a base layer and heat-treated at 180 ° C. for 30 minutes in a blown constant temperature dryer to form a coating layer, thereby obtaining a coated substrate as an evaluation sample.

  And about the sample for evaluation of Examples 1-5, Comparative Examples 1-2, and Reference Examples 1-2, the transmittance | permeability spectrum in a 300-800 nm wavelength range is UV-VIS spectrophotometer (the Shimadzu Corporation make " UV3100-PC "). The results are shown in FIGS. Moreover, the transmittance | permeability of the sample for evaluation in 380 nm and 405 nm is shown to Tables 1-4 about the sample for evaluation of Examples 1-6, Comparative Examples 1-3, and Reference Examples 1-2.

(Insect-proof evaluation)
About the thing which covered the circumference of 13W compact type fluorescent lamp made by Matsushita Electric Industrial Co., Ltd. with a glove made of transparent glass with a thickness of 2 mm, the coating composition and coat for the base layer in each example and each comparative example on the glove The coating composition for the layer was spray-coated in the same manner as described above, and a coating film was formed by applying heat treatment at 180 ° C. for 30 minutes in a blown constant temperature dryer. In addition, a 50 × 300 mm adhesive trap whose surface was coated with an adhesive was attached to this lighting fixture.

  The luminaire thus formed was placed in a 10 m square room, and two kinds of insects, flies and moths, were placed in this room, respectively, and the light source was emitted and left for 1 hour. Then, the number of insects collected in the adhesive trap was counted, and the number of insects collected in Comparative Example 1 was set as 100, and the evaluation was performed based on this.

(Durability evaluation)
Heat resistance test A: After an evaluation sample formed in the same manner as in the transmittance test was left in a thermostatic bath at 105 ° C. for one month, the appearance of the sample after being wiped with a cloth containing water several times. The change was observed visually.

  Weather resistance test B: An evaluation sample formed in the same manner as in the transmittance test was placed at a position of 15 cm from a mercury lamp (Matsushita Electric Industrial Co., Ltd., 400 W mercury lamp). The appearance change after 3 months and after 3 months was visually observed.

  Boiling resistance test C: A change in appearance after visually immersing an evaluation sample formed in the same manner as in the transmittance test for 2 hours in boiling water was visually observed.

The above tests A to C were evaluated according to the following criteria.
◎… No change in appearance ○ ○ Slight change in appearance ×… Significant change in appearance (exfoliation, extreme scratches, discoloration, bleed out to the surface, etc.)
(Tackiness evaluation)
Fingerprints were attached to the film of the above transmittance test evaluation sample, and it was visually confirmed whether or not fingerprint marks remained when wiped with a cloth, and evaluation was performed according to the following criteria.
○ ... be wiped off with × ... cloth leaving no fingerprints when wiped with a cloth leaving a fingerprint trace Incidentally, the ultraviolet absorber of the coating 1cm per ³ in each table is a calculated as follows values is there. First, when preparing the sample for transmittance test evaluation described above, the mass of the flat glass substrate and the mass of the glass substrate with a coating film were measured using an electronic balance, and the difference in mass of the coating film was determined by taking the mass difference. Calculate the mass. Next, the film thickness of the coating film is measured with a stylus-type film thickness meter, the volume of the coating film is calculated from the area and film thickness of the glass substrate, and the density of the coating film is calculated from the weight and volume of the coating film . On the other hand, from the formulation and coating amount of the coating composition for the base layer, the mass of the translucent resin, ultraviolet absorber, and isocyanate remaining as solids in the base layer of the glass substrate with a coating after heat treatment is calculated, and for the coating layer From the formulation and coating amount of the coating composition, the mass of the translucent resin and isocyanate remaining as solids in the coating layer of the glass substrate with a coating after heat treatment is calculated, and the mass of the UV absorber in the coating is determined. . And the density of the coating film obtained in this way, the mass of the UV absorber in the coating film, the solid content of the base layer of the coating film (translucent resin, UV absorber, isocyanate), From the mass of the solid content (translucent resin, isocyanate) of the coating layer, the amount of the ultraviolet absorbent per 1 cm ³ of the coating film can be calculated by the following formula.

UV absorber amount per 1 cm ^{3 of} coating film (g / cm ³ ) = density of coating film (g / cm ³ ) × mass of UV absorber in coating film (g) / {mass of solid content of base layer (g ) + Mass of solid content of coat layer (g)}

  As is clear from the above results, in Examples 1 to 6 and Comparative Examples 1 and 2, the ultraviolet light is almost absorbed in the wavelength region of 300 to 405 nm, and the visible light transmission is high, while the comparison is made. In Examples 3 to 5, absorption of ultraviolet light in the wavelength region of 300 to 405 nm was not sufficient.

  Moreover, when Examples 1-6 and Comparative Examples 1-2 are compared, since the coating layer is not formed in Comparative Examples 1-2, the UV absorber of the base layer cannot be protected, and the coating is performed regardless of the resin type of the base layer. Even after the formation of the layer, stickiness is generated on the surface of the coating film, resulting in poor tackiness.

  Further, when Examples 1 to 6 and Reference Examples 1 and 2 are compared, Reference Examples 1 and 2 have an extremely small amount of ultraviolet absorber added to the base layer as compared with Examples 1 to 6, resulting in 300 to 405 nm. It can be seen that the absorption of ultraviolet light in the range is not sufficient. Further, it can be seen that even when only the coating layer is provided on the substrate as in Comparative Example 3, there is almost no ultraviolet light absorption performance.

Furthermore, compared with each comparative example, it was confirmed that the thing of each Example has low insect attractivity and is highly durable.

(Examples 7 to 8)
The first agent for the base layer was prepared by stirring the translucent resin, ultraviolet absorber, inorganic fine particles, and isocyanate listed in Table 5 at 300 rpm for 30 minutes. “UTCO-501 White” in Table 5 is a titanium oxide / xylene dispersion manufactured by Dainippon Seika Kogyo Co., Ltd.

  The first agent for the coat layer, the second agent for the base layer, and the second agent for the coat layer were prepared in the same manner as described above, and further, in the same manner as described above, for the coating composition for the base layer and for the coat layer. A coating composition was prepared.

  After that, the transmittance, insect attractance, durability, and tackiness were evaluated in the same manner as described above, and these results are shown in FIG. 10, FIG. 11 and Table 5.

  As seen in the results of Example 7 and Example 8, it is confirmed that the ultraviolet absorption is improved by the blending of the inorganic fine particles.

It is sectional drawing of a base material with a coating film. 4 is a graph showing a measurement result of a transmittance spectrum in a wavelength region of 300 to 800 nm in Example 1. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in Example 2. 6 is a graph showing a measurement result of a transmittance spectrum in a wavelength region of 300 to 800 nm in Example 3. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in Example 4. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in Example 5. 6 is a graph showing a measurement result of a transmittance spectrum in a wavelength region of 300 to 800 nm in Comparative Example 1. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in the comparative example 2. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in the reference examples 1 and 2. FIG. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in Example 7. It is a graph which shows the measurement result of the transmittance | permeability spectrum in the 300-800 nm wavelength range in Example 8.

Explanation of symbols

1 base layer 2 coat layer 3 coating film 4 substrate

Claims (21)

  Provided on the surface of the base material is a coating film comprising a base layer obtained by dispersing an ultraviolet absorber in a translucent resin as a binder, and a coat layer formed from the translucent resin and laminated on the outside of the base layer A base material with a coating film characterized by comprising:   The base material with a coating film according to claim 1, wherein the translucent resin serving as a binder for the base layer has a benzotriazole-based ultraviolet absorbing group in the molecular skeleton.   The coated substrate according to claim 1 or 2, wherein the ultraviolet absorber dispersed and contained in the base layer is at least one selected from benzotriazole compounds and hydroxyphenyltriazine compounds.   The coating film according to claim 1 or 2, wherein the ultraviolet absorber dispersed and contained in the base layer is at least one selected from a benzotriazole-based compound having a chloro group and a trisresorcinol triazine-based compound. With base material. The content of the ultraviolet absorber dispersed in the base layer is set so as to be in the range of 0.05 to 10.0 g per 1 cm ^{3 of} the coating film. Substrate with a coating film.   The base material with a coating film according to any one of claims 1 to 5, wherein the translucent resin forming the coating layer has a benzotriazole-based ultraviolet absorbing group in the molecular skeleton.   The translucent resin is acrylic resin, alkyd resin, polycarbonate resin, polyurethane resin, epoxy resin, melamine resin, diethylene glycol bisallyl carbonate resin, acrylonitrile-styrene copolymer, methyl methacrylate-styrene copolymer, polyethylene resin, polystyrene The base material with a coating film according to any one of claims 1 to 6, which is at least one resin selected from a resin, an olefin resin, and an alloy material containing these as a main component.   8. The coating film according to claim 1, wherein at least one of the base layer and the coating layer contains at least one inorganic fine particle selected from zinc oxide, titanium oxide, cerium oxide, and iron oxide. With base material. The substrate with a coating film according to claim 8, wherein the content of the inorganic fine particles is set to be in a range of 0.005 to 0.5 g per 1 cm ³ of the coating film.   The base material with a coating film according to any one of claims 1 to 9, wherein the thickness of the base layer is 2 to 50 µm, and the thickness of the coat layer is 5 to 70 µm.   A base layer is prepared by coating and curing a base layer coating composition containing a translucent resin, an isocyanate and an ultraviolet absorber as a binder, and a coat layer containing the translucent resin and the isocyanate. A base material with a coating film characterized by laminating a coating film having a base layer and a coating layer on the surface of the base material by applying and curing a coating composition on the base layer to produce a coating layer Production method.   12. The method for producing a coated substrate according to claim 11, wherein the translucent resin of the coating composition for the base layer has a benzotriazole-based ultraviolet absorbing group in the molecular skeleton.   13. The production of a coated substrate according to claim 11, wherein the ultraviolet absorber of the coating composition for the base layer is at least one selected from benzotriazole compounds and hydroxyphenyltriazine compounds. Method.   The ultraviolet absorber of the coating composition for a base layer is at least one selected from a benzotriazole-based compound having a chloro group and a trisresorcinol triazine-based compound. A method for producing a substrate. The coating film according to any one of claims 11 to 14, wherein the content of the ultraviolet absorber in the coating composition for the base layer is in the range of 0.05 to 10.0 g per 1 cm ³ of the coating film. A manufacturing method of a substrate with a mark.   The translucent resin of the resin composition for a coat layer has a benzotriazole-based ultraviolet absorbing group in the molecular skeleton, and the substrate with a coating film according to any one of claims 11 to 15 Production method.   The method for producing a substrate with a coating film according to any one of claims 11 to 16, wherein a silane coupling agent is contained in at least one of the coating composition for the base layer and the resin composition for the coat layer. .   A light fixture comprising a translucent member produced using the substrate with a coating film according to claim 1.   A lighting apparatus comprising a light source having a translucent member produced using the substrate with a coating film according to claim 1 as an outer shell.   A lighting apparatus comprising a reflecting member produced using the substrate with a coating film according to claim 1.   A lamp comprising a translucent member produced by using the substrate with a coating film according to claim 1 as an outer shell.

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