JP6828907B2 - Method for improving transmittance of organic substrate and coating film for improving transmittance - Google Patents
Method for improving transmittance of organic substrate and coating film for improving transmittance Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims description 142
- 238000000576 coating method Methods 0.000 title claims description 142
- 238000002834 transmittance Methods 0.000 title claims description 100
- 239000000758 substrate Substances 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims description 68
- 239000000463 material Substances 0.000 claims description 53
- 150000007530 organic bases Chemical class 0.000 claims description 46
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 35
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 34
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 30
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 30
- 150000002484 inorganic compounds Chemical class 0.000 claims description 20
- 229910010272 inorganic material Inorganic materials 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 19
- 150000004292 cyclic ethers Chemical class 0.000 claims description 18
- 235000012239 silicon dioxide Nutrition 0.000 claims description 18
- -1 n-propyl alcohols Chemical class 0.000 claims description 17
- 239000010419 fine particle Substances 0.000 claims description 16
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 16
- 150000002894 organic compounds Chemical class 0.000 claims description 14
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 12
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 claims description 12
- 229910052990 silicon hydride Inorganic materials 0.000 claims description 12
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims 4
- 239000010408 film Substances 0.000 description 91
- 230000006872 improvement Effects 0.000 description 21
- 229920000515 polycarbonate Polymers 0.000 description 16
- 239000004417 polycarbonate Substances 0.000 description 16
- 239000010409 thin film Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000002585 base Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000003373 anti-fouling effect Effects 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 239000002519 antifouling agent Substances 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 description 2
- 150000007529 inorganic bases Chemical class 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000007649 pad printing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 150000003112 potassium compounds Chemical class 0.000 description 1
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
Description
本発明は、照明デバイスやディスプレイデバイスにおいて光利用効率を向上させるために、有機化合物と無機化合物をベースにした液剤を有機基材に塗布して透過率を向上させる方法と、有機基材の透過率を向上させる被覆膜に関するものである。 The present invention provides a method for improving the transmittance by applying a liquid agent based on an organic compound and an inorganic compound to an organic base material in order to improve the light utilization efficiency in a lighting device or a display device, and a method for improving the transmittance of the organic base material. It relates to a coating film that improves the rate.
近年、照明デバイスやディスプレイデバイスにおいては、消費電力を削減することが大きな課題である。低消費電力化の有効な手段として、照明デバイスやディスプレイデバイスを構成する透明部材や半透明部材の防汚性と透過率を高めることが有効である。
特に、照明デバイスでは、アクリル樹脂、ポリカーボネイト樹脂、ポリエステル樹脂など耐有機溶媒性が低い有機基材が、透明部材や半透明部材に用いられる。In recent years, reducing power consumption has become a major issue in lighting devices and display devices. As an effective means for reducing power consumption, it is effective to increase the antifouling property and the transmittance of the transparent members and translucent members constituting the lighting device and the display device.
In particular, in lighting devices, organic base materials having low organic solvent resistance such as acrylic resin, polycarbonate resin, and polyester resin are used for transparent members and translucent members.
従来は、有機基材に被覆液を塗布する前にプライマーを塗布してプライマー層を形成させた後、プライマー層の上に被覆液を塗布するやり方が一般的であるが、被覆液が有機基材を直接的に被覆しておらず、有機基材と被覆液の密着強度が低いといった問題がある。
プライマー層の形成を必要とすることなく、有機基材に対する密着性を高め、防汚性を高める有機基材用防汚剤として、メタノール又はエタノールと、イソプロピルアルコール、ノルマルプロピルアルコール又はグリコールエーテルと、テトラヒドロフランと、ホウ酸を含有する防汚剤が知られている（特許文献１を参照）。
特許文献１に開示された防汚剤は、アルコールベースの透明液体であり、常温乾燥後、無色透明な無機硬化塗膜を形成する。そして、アルコールが有機基材の表面に接触することにより、基材の最表面で膨潤、一部溶解が生じて、基材にシリカが潜り込み、基材表面に密着性のよい親水性被膜を形成する（特許文献１の図１を参照）。しかし特許文献１には、防汚性と密着性について開示があるものの、透過率については言及されていない。Conventionally, it is common to apply a primer to form a primer layer before applying a coating liquid to an organic substrate, and then apply a coating liquid on the primer layer. However, the coating liquid is an organic group. There is a problem that the material is not directly coated and the adhesion strength between the organic base material and the coating liquid is low.
As antifouling agents for organic substrates that enhance adhesion to organic substrates and enhance antifouling properties without the need to form a primer layer, methanol or ethanol, isopropyl alcohol, normal propyl alcohol or glycol ether, Antifouling agents containing tetrahydrofuran and boric acid are known (see Patent Document 1).
The antifouling agent disclosed in Patent Document 1 is an alcohol-based transparent liquid, and forms a colorless and transparent inorganic cured coating film after drying at room temperature. Then, when the alcohol comes into contact with the surface of the organic base material, swelling and partial dissolution occur on the outermost surface of the base material, silica sneaks into the base material, and a hydrophilic film having good adhesion is formed on the surface of the base material. (See FIG. 1 of Patent Document 1). However, although Patent Document 1 discloses antifouling property and adhesiveness, it does not mention transmittance.
また、水を含むアルカリ性コロイダルシリカと、リン酸ナトリウム化合物或いはリン酸カリウム化合物の単体又は混合物と、ホウ酸を含む水性無機コート剤が知られている（特許文献２を参照）。
かかる水性無機コート剤をガラスに塗布すれば、透明度が２〜３％に向上するとされている。しかしながら、特許文献２では、ガラスのような無機基材への適用についてのみ開示されており、有機基材については開示されていない。Further, an aqueous inorganic coating agent containing water-containing alkaline colloidal silica, a sodium phosphate compound or a potassium phosphate compound alone or a mixture, and boric acid is known (see Patent Document 2).
It is said that if such an aqueous inorganic coating agent is applied to glass, the transparency is improved to 2 to 3%. However, Patent Document 2 discloses only application to an inorganic base material such as glass, and does not disclose an organic base material.
また、水に四塩化チタンを混合すると共に、この混合溶液にリン酸と水酸化マグネシウムを混合して得られる混合液の沈殿物を沈殿させた上澄み液を、リン酸と、チタン酸と、マグネシウムの陽イオンとを含む被膜形成液とし、この被膜形成液を成膜して得られた防曇性アモルファス被膜が知られている（特許文献３を参照）。かかる防曇性アモルファス被膜には、低反射効果がある（反射率が向上する）とされているが、透過率はガラスと比較して１％以下とされている。 Further, the supernatant liquid obtained by mixing titanium tetrachloride with water and precipitating the precipitate of the mixed solution obtained by mixing phosphoric acid and magnesium hydroxide in this mixed solution is prepared by phosphoric acid, titanium acid, and magnesium. There is known an antifogging amorphous film obtained by forming a film-forming solution containing the cations of (see Patent Document 3). It is said that such an antifogging amorphous film has a low reflectance effect (improvement of reflectance), but the transmittance is 1% or less as compared with glass.
このように、上記特許文献１では乾燥後に形成した微細な表面構造により防汚性の向上が期待できると記載されているが、有機基材に対して透過率が向上するか不明である。
上記特許文献２では、ガラスのような無機基材への適用についてのみ記載されており、有機基材については開示されておらず、有機基材に対して透過率が向上するか不明である。
上記特許文献３では、アモルファス被膜が形成されることにより低反射効果があると記載されているが、透過率がガラスと比較して１％以下であるので、その効果は小さい。As described above, Patent Document 1 describes that the fine surface structure formed after drying can be expected to improve the antifouling property, but it is unclear whether the transmittance is improved with respect to the organic substrate.
The above-mentioned Patent Document 2 describes only the application to an inorganic base material such as glass, does not disclose the organic base material, and it is unclear whether the transmittance is improved with respect to the organic base material.
In Patent Document 3, it is described that the formation of an amorphous film has a low reflection effect, but the effect is small because the transmittance is 1% or less as compared with glass.
かかる状況に鑑みて、本発明は、有機基材表面にプライマー層を形成することなく、直接に被覆膜を形成させて、有機基材の透過率を向上させる方法と、透過率を向上させる被覆膜を提供することを目的とする。 In view of such a situation, the present invention presents a method of directly forming a coating film without forming a primer layer on the surface of an organic base material to improve the transmittance of the organic base material and improving the transmittance. It is an object of the present invention to provide a coating film.
上記課題を解決すべく、本発明の有機基材の透過率向上方法は、透明乃至半透明の有機基材の透過率を向上する方法であって、有機基材に被覆液を塗布し乾燥させるステップと、被覆液の塗布膜を所定の乾燥膜厚に形成させるステップを備える。被覆液は二酸化ケイ素を含む無機化合物と有機化合物とアルコールおよび水より構成されたものである。有機基材の少なくとも片面に塗布して形成された乾燥膜は、二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、乾燥膜厚が４５〜２００ｎｍの範囲である。被覆液の塗布後の透過率が塗布前の透過率と比べて１．５％以上高くすることができる。乾燥膜厚は７０〜１８０ｎｍの範囲であることがより好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて２．５％以上高くすることができる。乾燥膜厚は８５〜１６５ｎｍの範囲であることが更に好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて３％以上高くすることができる。乾燥膜厚は１１０〜１５０ｎｍの範囲であることが更に好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて３．５％以上高くすることができる。乾燥膜厚は１２０〜１４０ｎｍで透過率向上率がピークとなる。 In order to solve the above problems, the method for improving the transmittance of an organic base material of the present invention is a method for improving the transmittance of a transparent to translucent organic base material, in which a coating liquid is applied to the organic base material and dried. It includes a step and a step of forming a coating film of a coating liquid to a predetermined dry film thickness. The coating liquid is composed of an inorganic compound containing silicon dioxide, an organic compound, alcohol and water. The dry film formed by coating on at least one side of the organic substrate is a film composed of aggregates of silicon dioxide fine particles, in which a minute space of air exists and the dry film thickness is in the range of 45 to 200 nm. is there. The transmittance after coating of the coating liquid can be increased by 1.5% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 70 to 180 nm, and the transmittance after coating of the coating liquid can be increased by 2.5% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 85 to 165 nm, and the transmittance of the coating liquid after coating can be increased by 3% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 110 to 150 nm, and the transmittance of the coating liquid after coating can be increased by 3.5% or more as compared with the transmittance before coating. The dry film thickness is 120 to 140 nm, and the transmittance improvement rate peaks.
本発明の透過率向上方法を用いることにより、照明デバイス等の光利用効率を向上させ、それらのデバイスの低消費電力化が図ることが可能になる。
被覆液には二酸化ケイ素微粒子が混合、分散されているので、アルコールなどの溶剤が蒸発することにより、有機基材の表面には二酸化ケイ素微粒子が固化した薄膜層が形成される。薄膜層は二酸化ケイ素微粒子の微小な塊が有機基材の表面に薄く形成されたものであり、二酸化ケイ素微粒子間には微小な空間が生じる。この微小な空間は、屈折率が１．０の空気の空間である。二酸化ケイ素の屈折率は波長５５０ｎｍのところでは、１．４５〜１．５５であるので、二酸化ケイ素微粒子の中に空気の空間がどれだけ存在するかで薄膜層の屈折率が決まる。このように二酸化ケイ素微粒子間に空気の微小な空間が存在することにより、薄膜層の屈折率を下げることができる。By using the method for improving the transmittance of the present invention, it is possible to improve the light utilization efficiency of lighting devices and the like, and to reduce the power consumption of those devices.
Since the silicon dioxide fine particles are mixed and dispersed in the coating liquid, a thin film layer in which the silicon dioxide fine particles are solidified is formed on the surface of the organic substrate by evaporation of a solvent such as alcohol. The thin film layer is formed by thinly forming minute lumps of silicon dioxide fine particles on the surface of an organic base material, and minute spaces are formed between the silicon dioxide fine particles. This minute space is an air space having a refractive index of 1.0. Since the refractive index of silicon dioxide is 1.45 to 1.55 at a wavelength of 550 nm, the refractive index of the thin film layer is determined by how much air space exists in the silicon dioxide fine particles. The existence of minute spaces of air between the silicon dioxide fine particles in this way can reduce the refractive index of the thin film layer.
通常、二酸化ケイ素微粒子が固化して薄膜を形成する場合の屈折率は１．３０〜１．３３ぐらいである。しかし薄膜層の屈折率を低くしても、薄膜層の膜厚を可視光の波長に対してうまく設定しないと可視光の光干渉効果による透過率を向上させることができない。
本発明では、被膜液を塗布して形成した薄膜層の膜厚と透過率向上率の関係を明らかにして、最適な膜厚を見出すことにより大きな透過率向上率が実現できる有機基材への透過率向上方法を提供している。この有機基材の透過率向上方法を用いることにより、照明デバイス等の光利用効率を向上させ、それらのデバイスの低消費電力化が図ることができる。Usually, the refractive index when the silicon dioxide fine particles are solidified to form a thin film is about 1.30 to 1.33. However, even if the refractive index of the thin film layer is lowered, the transmittance due to the light interference effect of visible light cannot be improved unless the film thickness of the thin film layer is properly set with respect to the wavelength of visible light.
In the present invention, the relationship between the film thickness of the thin film layer formed by applying the coating liquid and the transmittance improvement rate is clarified, and by finding the optimum film thickness, a large transmittance improvement rate can be realized in an organic substrate. It provides a method for improving the transmittance. By using this method for improving the transmittance of the organic base material, it is possible to improve the light utilization efficiency of lighting devices and the like, and reduce the power consumption of those devices.
また、本発明の有機基材の透過率向上方法において、有機基材の両面に塗布して形成される２つの乾燥膜は、共に二酸化ケイ素微粒子の集合体により構成された膜であり、それぞれの面の乾燥膜厚を加算して平均化した膜厚が５０〜２００ｎｍの範囲であれば、被覆液の塗布後の透過率が塗布前の透過率と比べて３％以上高くすることができる。乾燥膜厚は７５〜１８５ｎｍの範囲であることがより好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて５％以上高くすることができる。乾燥膜厚は９０〜１７０ｎｍの範囲であることが更に好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて６％以上高くすることができる。乾燥膜厚は１１０〜１５０ｎｍの範囲であることが更に好ましく、被覆液の塗布後の透過率が塗布前の透過率と比べて７％以上高くすることができる。乾燥膜厚は１２０〜１４０ｎｍで透過率向上率がピークとなる。
透過率の向上メカニズムは有機基材の片面のものと同様であり、有機基材の両面に被膜液を塗布して得られる二酸化ケイ素微粒子の集合体により構成される膜の効果は、片面に塗布したものより概ね２倍の透過率向上率が得られる。Further, in the method for improving the transmittance of the organic base material of the present invention, the two dry films formed by coating on both sides of the organic base material are both membranes composed of aggregates of silicon dioxide fine particles, and each of them. When the thickness averaged by adding the dry film thickness of the surface is in the range of 50 to 200 nm, the transmittance after coating of the coating liquid can be increased by 3% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 75 to 185 nm, and the transmittance of the coating liquid after coating can be increased by 5% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 90 to 170 nm, and the transmittance after coating of the coating liquid can be increased by 6% or more as compared with the transmittance before coating. The dry film thickness is more preferably in the range of 110 to 150 nm, and the transmittance of the coating liquid after coating can be increased by 7% or more as compared with the transmittance before coating. The dry film thickness is 120 to 140 nm, and the transmittance improvement rate peaks.
The mechanism for improving the transmittance is the same as that of one side of the organic base material, and the effect of the film composed of aggregates of silicon dioxide fine particles obtained by applying the coating liquid on both sides of the organic base material is applied to one side. The transmittance improvement rate is almost twice as high as that of the above.
ここで使用する有機基材は、好適には、ポリカーボネイト樹脂、アクリル樹脂及びポリエステル樹脂である。また、本発明における被覆液は、基材表面に塗布するために予めプライマーを設けることが必要であった有機基材に直接適用することができるが、従来の如く、プライマー層を形成させた後に、塗布しても構わない。また結晶性フィルムあるいは非晶性フィルムに関わらずＣＯＰ（シクロオレフィンポリマー）シート、ＰＰ（ポリプロピレン）シートなどの有機基材は密着性に欠けるので、これらの有機基材を使用する場合は、プラズマ処理、ＵＶ処理、コロナ処理、イトロ処理等の表面活性処理をおこなっても構わない。
被覆液の乾燥は、常温で行ってもよく、アルコールを除去し乾燥させて、有機基材の表面に被覆膜を形成させる。また、半透明とは、完全な透明ではないが、下にある物を完全に隠蔽しない程度の透過性を有する状態をいう。The organic base material used here is preferably a polycarbonate resin, an acrylic resin and a polyester resin. Further, the coating liquid in the present invention can be directly applied to an organic base material which needs to be provided with a primer in advance in order to be applied to the surface of the base material, but as in the conventional case, after the primer layer is formed. , May be applied. In addition, organic substrates such as COP (cycloolefin polymer) sheet and PP (polypropylene) sheet lack adhesion regardless of whether they are crystalline films or amorphous films. Therefore, when these organic substrates are used, plasma treatment is performed. , UV treatment, corona treatment, itro treatment and other surface activation treatments may be performed.
The coating liquid may be dried at room temperature, and alcohol is removed and dried to form a coating film on the surface of the organic substrate. In addition, translucent refers to a state in which it is not completely transparent, but has transparency to the extent that it does not completely hide the underlying object.
有機基材の片面に塗布して得られる乾燥膜厚が４５ｎｍ〜２００ｎｍの範囲であることが好ましい理由は、乾燥膜厚が４５ｎｍより薄い場合には、有機基材の表面で反射した反射光の位相と、乾燥薄膜の表面で反射する反射光の位相があわず、反射光を打ち消す効果が薄くなり、その結果、透過率の向上が低下するからである。また、乾燥膜厚が２００ｎｍ以上になると、同様に有機基材の表面で反射した反射光の位相と、乾燥薄膜の表面で反射する反射光の位相が合わなくなって、その結果、透過率の向上が低下するからである。
有機基材の両面に塗布して得られる乾燥膜厚が５０ｎｍ〜２００ｎｍの範囲であることが好ましい理由も片面の場合と同じである。The reason why the dry film thickness obtained by applying to one side of the organic substrate is preferably in the range of 45 nm to 200 nm is that when the dry film thickness is thinner than 45 nm, the reflected light reflected on the surface of the organic substrate This is because the phase and the phase of the reflected light reflected on the surface of the dry thin film do not match, and the effect of canceling the reflected light becomes weak, and as a result, the improvement of the transmittance decreases. Further, when the dry film thickness is 200 nm or more, the phase of the reflected light reflected on the surface of the organic base material and the phase of the reflected light reflected on the surface of the dry thin film do not match, and as a result, the transmittance is improved. This is because
The reason why the dry film thickness obtained by coating on both sides of the organic substrate is preferably in the range of 50 nm to 200 nm is the same as in the case of one side.
本発明の透過率向上方法における被覆液は、主成分として、下記ａ）〜ｃ）を有する。
ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、
ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物、
ｃ）メタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコール。The coating liquid in the method for improving the transmittance of the present invention has the following a) to c) as main components.
a) At least one organic compound of 1-methoxy-2-propanol and cyclic ether,
b) At least one inorganic compound of amorphous silicon dioxide and silicon hydride,
c) At least one alcohol selected from the group of methanol, ethanol, isopropyl alcohol and n-propyl alcohol.
上記ａ）〜ｃ）を主成分として有する被覆液を、透明乃至半透明の有機基材の片面に直接塗布し、乾燥膜厚を４５〜２００ｎｍの範囲にすることにより、被覆液の塗布後の透過率は塗布前の透過率と比べて１．５％以上高くできる。また有機基材への両面に直接塗布して、乾燥膜厚の平均膜厚が５０〜２００ｎｍの範囲にすることにより、被覆液の塗布後の透過率は塗布前の透過率と比べて３％以上高くできる。これにより、照明デバイス等の光利用効率を向上させ、それらのデバイスの低消費電力化を図る。 After the coating liquid is applied, the coating liquid containing the above a) to c) as the main component is directly applied to one side of the transparent to translucent organic base material to set the dry film thickness in the range of 45 to 200 nm. The transmittance can be increased by 1.5% or more as compared with the transmittance before coating. Further, by applying directly to both sides of the organic substrate so that the average film thickness of the dry film thickness is in the range of 50 to 200 nm, the transmittance after application of the coating liquid is 3% as compared with the transmittance before application. It can be higher than that. As a result, the light utilization efficiency of lighting devices and the like is improved, and the power consumption of those devices is reduced.
被覆液は、組成比で５〜２５％の水を含有し、また、硼酸塩，硝酸塩及び珪酸塩の群から選択される少なくとも一種の無機化合物を更に有することが好ましい。また、被覆液は、アルカリ金属塩またはアルカリ土類金属塩を更に有することが好ましい。好適には、アルカリ土類金属塩として、水酸化マグネシウム、炭酸マグネシウム、塩化マグネシウム、水酸化カルシウム、炭酸カルシウム、塩化カルシウムなどの無機酸塩を用いることができる。 The coating liquid preferably contains 5 to 25% water in a composition ratio and further contains at least one inorganic compound selected from the group of borates, nitrates and silicates. Further, it is preferable that the coating liquid further contains an alkali metal salt or an alkaline earth metal salt. Preferably, as the alkaline earth metal salt, inorganic acid salts such as magnesium hydroxide, magnesium carbonate, magnesium chloride, calcium hydroxide, calcium carbonate and calcium chloride can be used.
具体的に、被覆液は、上記ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は３０％以下であり、環状エーテルの組成比は３％以下である。また、上記ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は１〜６％である。また、上記ｃ）のメタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコールにおいて、メタノールの組成比は５〜４５％であり、エタノールの組成比は３５％以下であり、イソプロピルアルコールの組成比は４０％以下であり、ｎ−プロピルアルコールの組成比は３０％以下である。 Specifically, the coating liquid has a composition ratio of 1-methoxy-2-propanol of 30% or less and a composition ratio of the cyclic ether in the organic compound of 1-methoxy-2-propanol or cyclic ether of the above a). It is 3% or less. Further, in at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in b) above, the composition ratio of one or two kinds combined is 1 to 6%. Further, in at least one alcohol selected from the group of methanol, ethanol, isopropyl alcohol and n-propyl alcohol in c) above, the composition ratio of methanol is 5 to 45%, and the composition ratio of ethanol is 35% or less. Yes, the composition ratio of isopropyl alcohol is 40% or less, and the composition ratio of n-propyl alcohol is 30% or less.
次に、本発明の有機基材の透過率向上被覆膜について説明する。
本発明の有機基材の透過率向上被覆膜は、透明乃至半透明の有機基材に被覆された被覆膜であって、被覆膜の主成分は、Ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、Ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物であり、有機基材の片面に塗布して形成される乾燥膜は、二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、乾燥膜厚は４５〜２００ｎｍの範囲である。
被覆液を、透明乃至半透明の有機基材の片面に塗布し、乾燥膜厚を４５〜２００ｎｍの範囲にすることにより、被覆液の塗布後の透過率は塗布前の透過率と比べて１．５％以上高くすることができる。また本発明の有機基材の透過率向上被覆膜は、上記と同様に、有機基材への両面に塗布して、それぞれの乾燥膜厚の平均膜厚が５０〜２００ｎｍの範囲にすることにより、被覆液の塗布後の透過率は塗布前の透過率と比べて３％以上高くすることができる。Next, the transmittance-improving coating film for the organic substrate of the present invention will be described.
The coating film for improving the permeability of the organic base material of the present invention is a coating film coated on a transparent to translucent organic base material, and the main component of the coating film is A) 1-methoxy-2-. At least one organic compound of propanol and cyclic ether, B) At least one inorganic compound of amorphous silicon dioxide and silicon hydride, and the dry film formed by coating on one side of the organic base material is silicon dioxide fine particles. It is a film composed of an aggregate of the above, in which a minute space of air exists, and the dry film thickness is in the range of 45 to 200 nm.
By applying the coating liquid to one side of a transparent to translucent organic base material and setting the dry film thickness in the range of 45 to 200 nm, the transmittance after coating of the coating liquid is 1 as compared with the transmittance before coating. It can be increased by 5.5% or more. Further, the transmittance-improving coating film of the organic base material of the present invention is applied to both sides of the organic base material in the same manner as described above, and the average film thickness of each dry film thickness is in the range of 50 to 200 nm. Therefore, the transmittance of the coating liquid after coating can be increased by 3% or more as compared with the transmittance before coating.
被覆膜は、硼酸塩，硝酸塩及び珪酸塩の群から選択される少なくとも一種の無機化合物を更に有することが好ましい。また、被覆膜は、アルカリ金属塩またはアルカリ土類金属塩を更に有することが好ましい。 The coating film preferably further comprises at least one inorganic compound selected from the group of borates, nitrates and silicates. Further, the coating film preferably further contains an alkali metal salt or an alkaline earth metal salt.
具体的に、被覆膜は、上記Ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は８０％以下であり、環状エーテルの組成比は８％以下である。また、上記Ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は３〜２０％である。 Specifically, the coating film has a composition ratio of 1-methoxy-2-propanol of 80% or less and a composition ratio of the cyclic ether in the organic compound of 1-methoxy-2-propanol or cyclic ether of A) above. Is less than 8%. Further, in at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in B) above, the composition ratio of one or two kinds combined is 3 to 20%.
本発明の有機基材の透過率向上方法及び透過率向上被覆膜によれば、有機基材表面にプライマー層を形成することなく、直接に被覆膜を形成させて、有機基材の透過率を向上させることができ、照明デバイスなどの光利用効率を向上させ低消費電力化を図ることができるといった効果がある。 According to the method for improving the transmittance of an organic base material and the coating film for improving the transmittance of the present invention, the coating film is directly formed on the surface of the organic base material without forming a primer layer to allow the organic base material to permeate. It has the effect of improving the rate, improving the light utilization efficiency of lighting devices and the like, and reducing power consumption.
以下、本発明の実施形態の一例を、図面を参照しながら詳細に説明していく。なお、本発明の範囲は、以下の実施例や図示例に限定されるものではなく、幾多の変更及び変形が可能である。 Hereinafter, an example of the embodiment of the present invention will be described in detail with reference to the drawings. The scope of the present invention is not limited to the following examples and illustrated examples, and many modifications and modifications can be made.
有機基材への被覆液の塗布は、図５に示す有機基材への被覆処理フローのように、先ず、有機基材の表面を工業用アルコールで脱脂洗浄し十分乾燥させた後（ステップＳ０１）、スピンコーターを用いて被覆液を塗布する（ステップＳ０２）。次に、被覆液を塗布した有機基材を恒温槽で乾燥させる（ステップＳ０３）。
以下の実施例では、透明の有機基材として、透明ポリカーボネイトシート（出光興産製、品名：ＬＣ１５００）を用いた。スピンコーターは、ミカサ株式会社製（品名：Ｏｐｔｉｃｏａｔ ＭＳ−Ａ１５０）を用い、所定の回転数で一定時間保持するやり方で塗布を行った。
なお、スピンコーターを用いて有機基材に被覆液を塗布する他に、膜厚が均一に塗布できれば、ディップコート、バーコート、フローコート、スプレーコート、インクジェット、パッド印刷、刷毛塗りなどの塗布方法を用いてもよい。To apply the coating liquid to the organic base material, first, the surface of the organic base material is degreased and washed with industrial alcohol and sufficiently dried as in the coating treatment flow for the organic base material shown in FIG. 5 (step S01). ), The coating liquid is applied using a spin coater (step S02). Next, the organic substrate coated with the coating liquid is dried in a constant temperature bath (step S03).
In the following examples, a transparent polycarbonate sheet (manufactured by Idemitsu Kosan, product name: LC1500) was used as the transparent organic base material. As the spin coater, Mikasa Co., Ltd. (product name: Opticoat MS-A150) was used, and the spin coater was applied by holding the spin coater at a predetermined rotation speed for a certain period of time.
In addition to applying the coating liquid to the organic substrate using a spin coater, if the film thickness can be uniformly applied, a coating method such as dip coating, bar coating, flow coating, spray coating, inkjet, pad printing, brush coating, etc. May be used.
実施例１では、有機基材として、厚さ５ｍｍの透明ポリカーボネイトシートを用い、下記表１の被覆液をシート片面に塗布した。 In Example 1, a transparent polycarbonate sheet having a thickness of 5 mm was used as the organic base material, and the coating liquid shown in Table 1 below was applied to one side of the sheet.
スピンコーターの回転数と乾燥膜厚の関係をみるために、スピンコーターの回転数を１０００ｒｐｍ、１５００ｒｐｍ、２０００ｒｐｍ、３０００ｒｐｍ、４０００ｒｐｍの５種類を選定した。回転数はそれぞれ７秒かけて所定の回転数にして、所定の回転数で２５秒間保持し、４秒かけて停止させて有機基材表面に被覆液を塗布した。
被覆液を塗布した有機基材は、恒温槽に入れて、６０℃、１分間の環境で乾燥させた。
図１は、スピンコーターの回転数と乾燥膜厚の関係を示したグラフである。図１に示すように、乾燥膜厚は、回転数１０００〜４０００ｒｐｍに対応しており、５０〜２００ｎｍのものが得られた。In order to examine the relationship between the rotation speed of the spin coater and the dry film thickness, five types of spin coater rotation speeds of 1000 rpm, 1500 rpm, 2000 rpm, 3000 rpm and 4000 rpm were selected. Each rotation speed was set to a predetermined rotation speed over 7 seconds, held at a predetermined rotation speed for 25 seconds, stopped for 4 seconds, and the coating liquid was applied to the surface of the organic substrate.
The organic substrate coated with the coating liquid was placed in a constant temperature bath and dried in an environment of 60 ° C. for 1 minute.
FIG. 1 is a graph showing the relationship between the rotation speed of the spin coater and the dry film thickness. As shown in FIG. 1, the dry film thickness corresponds to a rotation speed of 1000 to 4000 rpm, and a dry film thickness of 50 to 200 nm was obtained.
図２は、乾燥膜厚と透過率向上率の関係を示したグラフである。図２に示すようにブランクの有機基材（塗布液を塗布していない素板）の透過率が９０％であるのに対し、本実施例の被覆液の乾燥膜厚が４５〜２００ｎｍにおいて透過率が９１．５％以上でとなっている。このように乾燥膜厚が４５〜２００ｎｍの範囲では、本実施例の被覆液を塗布することによって透過率が１．５％以上増加することが判り、乾燥膜厚が１２０〜１４０ｎｍで透過率向上率がピークを持つ特性を有している。この図より乾燥膜厚が１１０〜１５０ｎｍの範囲では、透過率向上率が３．５％以上、乾燥膜厚が８５〜１６５ｎｍの範囲では、透過率向上率が３．０％以上、乾燥膜厚が７０〜１８０ｎｍの範囲では、透過率向上率が２．５％以上増加することが判る。 FIG. 2 is a graph showing the relationship between the dry film thickness and the transmittance improvement rate. As shown in FIG. 2, the transmittance of the blank organic substrate (base plate not coated with the coating liquid) is 90%, whereas the dry film thickness of the coating liquid of this example is permeated at 45 to 200 nm. The rate is 91.5% or more. As described above, when the dry film thickness is in the range of 45 to 200 nm, it is found that the transmittance is increased by 1.5% or more by applying the coating liquid of this example, and the transmittance is improved when the dry film thickness is 120 to 140 nm. It has the characteristic that the rate has a peak. From this figure, when the dry film thickness is in the range of 110 to 150 nm, the transmittance improvement rate is 3.5% or more, and in the dry film thickness range of 85 to 165 nm, the transmittance improvement rate is 3.0% or more and the dry film thickness. It can be seen that the transmittance improvement rate increases by 2.5% or more in the range of 70 to 180 nm.
実施例２では、有機基材として、厚さ５ｍｍの透明ポリカーボネイトシートを用い、表１の被覆液を透明ポリカーボネイトシートの両面に塗布した。図３は、乾燥膜厚と透過率向上率の関係を示したグラフである。膜厚はそれぞれの面の膜厚を加算して平均化した値である。図３に示すようにブランクの有機基材の透過率が９０％であるのに対し、本実施例の被覆液の乾燥膜厚が５０〜２００ｎｍにおいて透過率が９３％以上となっている。このように乾燥膜厚が５０〜２００ｎｍの範囲では、本実施例の被覆液を塗布することによって透過率が３％以上増加することが判り、乾燥膜厚が１２０〜１４０ｎｍで透過率向上率がピークを持つ特性を有している。この図より乾燥膜厚が１１０〜１５０ｎｍの範囲では、透過率向上率が７．０％以上、乾燥膜厚が９０〜１７０ｎｍの範囲では、透過率向上率が６．０％以上、乾燥膜厚が７５〜１８５ｎｍの範囲では、透過率向上率が５．０％以上、乾燥膜厚が６５〜２００ｎｍの範囲では、透過率向上率が４．０％以上増加することが判る。 In Example 2, a transparent polycarbonate sheet having a thickness of 5 mm was used as the organic base material, and the coating liquid shown in Table 1 was applied to both surfaces of the transparent polycarbonate sheet. FIG. 3 is a graph showing the relationship between the dry film thickness and the transmittance improvement rate. The film thickness is a value obtained by adding and averaging the film thickness of each surface. As shown in FIG. 3, the transmittance of the blank organic base material is 90%, whereas the transmittance is 93% or more when the dry film thickness of the coating liquid of this example is 50 to 200 nm. As described above, when the dry film thickness is in the range of 50 to 200 nm, it is found that the transmittance is increased by 3% or more by applying the coating liquid of this example, and the transmittance improvement rate is high when the dry film thickness is 120 to 140 nm. It has the property of having a peak. From this figure, when the dry film thickness is in the range of 110 to 150 nm, the transmittance improvement rate is 7.0% or more, and in the dry film thickness range of 90 to 170 nm, the transmittance improvement rate is 6.0% or more and the dry film thickness. It can be seen that the transmittance improvement rate increases by 5.0% or more in the range of 75 to 185 nm, and the transmittance improvement rate increases by 4.0% or more in the dry film thickness range of 65 to 200 nm.
実施例３では、有機基材として厚さ５ｍｍの透明ポリカーボネイトシートを用い、表１の被覆液を透明ポリカーボネイトシートの片面と両面に塗布したものと、被膜液を塗布していない透明ポリカーボネイトシート（ブランク）の分光透過率特性を測定した。
スピンコーターの回転数は１５００ｒｐｍに設定し、被覆液の乾燥条件は、実施例１と同じである。使用した被覆液は、表１と同じである。In Example 3, a transparent polycarbonate sheet having a thickness of 5 mm was used as the organic base material, and the coating liquid shown in Table 1 was applied to one side and both sides of the transparent polycarbonate sheet, and the transparent polycarbonate sheet (blank) to which the coating liquid was not applied. ), The spectral transmittance characteristics were measured.
The rotation speed of the spin coater is set to 1500 rpm, and the drying conditions of the coating liquid are the same as in Example 1. The coating liquid used is the same as in Table 1.
図４は、その分光透過率特性を示したグラフである。図４に示すように、全可視光線における被覆液を片面に塗布した透明ポリカーボネイトシートではブランクの透明ポリカーボネイトシートに対して透過率向上率が３．５％向上する。また、被覆液を両面に塗布した透明ポリカーボネイトシートでは、ブランクの透明ポリカーボネイトシートに対して、７．４％の透過率向上率が得られた。このように被膜液を透明ポリカーボネイトシートの片面あるいは両面に塗布して乾燥させた薄膜膜は、二酸化ケイ素微粒子と空気の微小空間が混在した膜であることから屈折率を低下させることができる。またそれと共に、薄膜層の膜厚を有機基材の片面に塗布する場合、４５〜２００ｎｍの範囲で被覆液の塗布後の透過率が塗布前の透過率と比べて１．５％以上高く、また有機基材の両面に５０ｎｍ〜２００ｎｍの範囲で被覆液の塗布後の透過率が塗布前の透過率と比べて３％以上高くすることができる。 FIG. 4 is a graph showing the spectral transmittance characteristics. As shown in FIG. 4, the transparent polycarbonate sheet coated with the coating liquid in all visible light on one side has a transmittance improvement rate of 3.5% higher than that of the blank transparent polycarbonate sheet. Further, in the transparent polycarbonate sheet coated with the coating liquid on both sides, a transmittance improvement rate of 7.4% was obtained as compared with the blank transparent polycarbonate sheet. The thin film film obtained by applying the film solution to one or both sides of the transparent polycarbonate sheet and drying the film is a film in which fine particles of silicon dioxide and minute spaces of air are mixed, so that the refractive index can be lowered. At the same time, when the thickness of the thin film layer is applied to one side of the organic substrate, the transmittance of the coating liquid after application is 1.5% or more higher than that before application in the range of 45 to 200 nm. Further, the transmittance of the coating liquid after coating on both sides of the organic substrate in the range of 50 nm to 200 nm can be increased by 3% or more as compared with the transmittance before coating.
実施例４では、有機基材として、実施例１と同様に、厚さ５ｍｍの透明ポリカーボネイトシートを用い、下記表２の被覆液をシート片面に塗布した。実施例１と同様に、スピンコーターの回転数は、１０００ｒｐｍ、１５００ｒｐｍ、２０００ｒｐｍ、３０００ｒｐｍ、４０００ｒｐｍの５種類とし、５種類の乾燥膜厚を得た。被覆液を塗布した有機基材は、実施例１と同様に、恒温槽に入れて、６０℃、１分間の環境で乾燥させた。 In Example 4, a transparent polycarbonate sheet having a thickness of 5 mm was used as the organic substrate as in Example 1, and the coating liquid shown in Table 2 below was applied to one side of the sheet. Similar to Example 1, the number of rotations of the spin coater was set to 5 types of 1000 rpm, 1500 rpm, 2000 rpm, 3000 rpm, and 4000 rpm, and 5 types of dry film thicknesses were obtained. The organic substrate coated with the coating liquid was placed in a constant temperature bath and dried in an environment of 60 ° C. for 1 minute in the same manner as in Example 1.
乾燥膜厚と透過率の相関を確認したところ、実施例１と同様に、乾燥膜厚を４５〜２００ｎｍの範囲になるような塗布膜厚にすれば、透過率が１．５％以上増加することが確認できた。 As a result of confirming the correlation between the dry film thickness and the transmittance, the transmittance increases by 1.5% or more if the coating film thickness is set to be in the range of 45 to 200 nm as in Example 1. I was able to confirm that.
実施例５では、有機基材として、実施例１と同様に、厚さ５ｍｍの透明ポリカーボネイトシートを用い、下記表３の被覆液をシート片面に塗布した。実施例１と同様に、スピンコーターの回転数は、１０００ｒｐｍ、１５００ｒｐｍ、２０００ｒｐｍ、３０００ｒｐｍ、４０００ｒｐｍの５種類とし、５種類の乾燥膜厚を得た。被覆液を塗布した有機基材は、実施例１と同様に、恒温槽に入れて、６０℃、１分間の環境で乾燥させた。 In Example 5, a transparent polycarbonate sheet having a thickness of 5 mm was used as the organic base material as in Example 1, and the coating liquid shown in Table 3 below was applied to one side of the sheet. Similar to Example 1, the number of rotations of the spin coater was set to 5 types of 1000 rpm, 1500 rpm, 2000 rpm, 3000 rpm, and 4000 rpm, and 5 types of dry film thicknesses were obtained. The organic substrate coated with the coating liquid was placed in a constant temperature bath and dried in an environment of 60 ° C. for 1 minute in the same manner as in Example 1.
乾燥膜厚と透過率の相関を確認したところ、実施例１と同様に、乾燥膜厚を４５〜２００ｎｍの範囲になるような塗布膜厚にすれば、透過率が１．５％以上増加することが確認できた。 As a result of confirming the correlation between the dry film thickness and the transmittance, the transmittance increases by 1.5% or more if the coating film thickness is set to be in the range of 45 to 200 nm as in Example 1. I was able to confirm that.
実施例１，実施例４及び実施例５で用いた被覆液を透明ポリカーボネイトシートの片面塗布に対して、硼酸塩又は珪酸塩を、組成比で０．１％未満添加したものも、同様に、乾燥膜厚を４５〜２００ｎｍの範囲になるような塗布膜厚にすれば、透過率が１．５％増加することが確認できた。 Similarly, the coating liquids used in Examples 1, 4 and 5 to which less than 0.1% of borate or silicate was added in a composition ratio to one-sided coating of a transparent polycarbonate sheet were also applied. It was confirmed that the transmittance was increased by 1.5% when the dry film thickness was set to a coating film thickness in the range of 45 to 200 nm.
また、実施例１，実施例４及び実施例５で用いた被覆液を透明ポリカーボネイトシートの片面塗布に対して、アルカリ金属塩としてカリウム化合物、又は、アルカリ土類金属塩としてマグネシウム化合物を、組成比で０．１％未満添加したものも、同様に、乾燥膜厚を４５〜２００ｎｍの範囲になるような塗布膜厚にすれば、透過率が１．５％増加することが確認できた。 Further, the coating liquids used in Examples 1, 4 and 5 were coated with a potassium compound as an alkali metal salt or a magnesium compound as an alkaline earth metal salt with respect to one-sided coating of a transparent polycarbonate sheet. Similarly, it was confirmed that the permeability of the compound added in less than 0.1% was increased by 1.5% when the dry film thickness was set to the range of 45 to 200 nm.
本発明は、照明デバイス等の透過率向上に有用である。
The present invention is useful for improving the transmittance of lighting devices and the like.
Claims (5)
前記有機基材に被覆液を塗布し乾燥させるステップと、
前記被覆液の塗布膜を所定の乾燥膜厚に形成させるステップ、
を備え、
前記被覆液は、
その主成分が、ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物、ｃ）メタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコール、であり、
組成比で５〜２５％の水を含有し、
硼酸塩と硝酸塩の少なくとも一種の無機化合物、或は、アルカリ土類金属塩を有し、
上記ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は３０％以下で、環状エーテルの組成比は３％以下であり、
上記ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は１〜６％であり、
上記ｃ）のメタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコールにおいて、メタノールの組成比は５〜４５％であり、エタノールの組成比は３５％以下であり、イソプロピルアルコールの組成比は４０％以下であり、ｎ−プロピルアルコールの組成比は３０％以下であり、
前記有機基材の少なくとも片面に塗布して形成される乾燥膜は二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、乾燥膜厚が４５〜２００ｎｍの範囲であり、前記被覆液の塗布後の透過率が塗布前の透過率と比べて１．５％以上高いことを特徴とする有機基材の透過率向上方法。 A method for improving the transmittance of a transparent to translucent organic substrate.
The step of applying the coating liquid to the organic substrate and drying it,
Step of forming a coating film of the coating liquid to a predetermined dry film thickness,
With
The coating solution,
Its main components are a) at least one organic compound of 1-methoxy-2-propanol and cyclic ether, b) at least one inorganic compound of amorphous silicon dioxide and silicon hydride, c) methanol, ethanol and isopropyl alcohol. And at least one alcohol selected from the group of n-propyl alcohols,
Contains 5 to 25% water in composition ratio,
It has at least one inorganic compound of borate and nitrate, or an alkaline earth metal salt.
In the organic compound of 1-methoxy-2-propanol or cyclic ether of a) above, the composition ratio of 1-methoxy-2-propanol is 30% or less, and the composition ratio of cyclic ether is 3% or less.
In at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in b) above, the composition ratio of one or two kinds combined is 1 to 6%.
In at least one alcohol selected from the group of methanol, ethanol, isopropyl alcohol and n-propyl alcohol in c) above, the composition ratio of methanol is 5 to 45%, and the composition ratio of ethanol is 35% or less. The composition ratio of isopropyl alcohol is 40% or less, and the composition ratio of n-propyl alcohol is 30% or less.
The dry film formed by coating on at least one surface of the organic substrate is a film composed of aggregates of silicon dioxide fine particles, in which a minute space of air exists, and the dry film thickness is in the range of 45 to 200 nm. A method for improving the transmittance of an organic base material, wherein the transmittance of the coating liquid after coating is 1.5% or more higher than that before coating.
前記有機基材に被覆液を塗布し乾燥させるステップと、
前記被覆液の塗布膜を所定の乾燥膜厚に形成させるステップ、
を備え、
前記被覆液は、
その主成分が、ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物、ｃ）メタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコール、であり、
組成比で５〜２５％の水を含有し、
硼酸塩と硝酸塩の少なくとも一種の無機化合物、或は、アルカリ土類金属塩を有し、
上記ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は３０％以下で、環状エーテルの組成比は３％以下であり、
上記ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は１〜６％であり、
上記ｃ）のメタノール，エタノール，イソプロピルアルコール及びｎ−プロピルアルコールの群から選択される少なくとも一種のアルコールにおいて、メタノールの組成比は５〜４５％であり、エタノールの組成比は３５％以下であり、イソプロピルアルコールの組成比は４０％以下であり、ｎ−プロピルアルコールの組成比は３０％以下であり、
前記有機基材の両面に塗布して形成される２つの乾燥膜は、共に二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、各面の乾燥膜厚の平均値は５０〜２００ｎｍの範囲であり、前記被覆液の塗布後の透過率が塗布前の透過率と比べて３％以上高いことを特徴とする有機基材の透過率向上方法。 A method for improving the transmittance of a transparent to translucent organic substrate.
The step of applying the coating liquid to the organic substrate and drying it,
Step of forming a coating film of the coating liquid to a predetermined dry film thickness,
With
The coating liquid is
Its main components are a) at least one organic compound of 1-methoxy-2-propanol and cyclic ether, b) at least one inorganic compound of amorphous silicon dioxide and silicon hydride, c) methanol, ethanol and isopropyl alcohol. And at least one alcohol selected from the group of n-propyl alcohols,
Contains 5 to 25% water in composition ratio,
It has at least one inorganic compound of borate and nitrate, or an alkaline earth metal salt.
In the organic compound of 1-methoxy-2-propanol or cyclic ether of a) above, the composition ratio of 1-methoxy-2-propanol is 30% or less, and the composition ratio of cyclic ether is 3% or less.
In at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in b) above, the composition ratio of one or two kinds combined is 1 to 6%.
In at least one alcohol selected from the group of methanol, ethanol, isopropyl alcohol and n-propyl alcohol in c) above, the composition ratio of methanol is 5 to 45%, and the composition ratio of ethanol is 35% or less. The composition ratio of isopropyl alcohol is 40% or less, and the composition ratio of n-propyl alcohol is 30% or less.
The two dry films formed by coating on both sides of the organic substrate are both films composed of aggregates of silicon dioxide fine particles, and there is a minute space of air , and the dry film thickness of each surface is high. A method for improving the transmittance of an organic substrate, wherein the average value is in the range of 50 to 200 nm, and the transmittance of the coating liquid after coating is 3% or more higher than the transmittance before coating.
前記被覆膜の主成分は、
Ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、
Ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物、
であり、
前記被覆膜は、硼酸塩と硝酸塩の少なくとも一種の無機化合物、或は、アルカリ土類金属塩を有し、
上記Ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は８０％以下であり、環状エーテルの組成比は８％以下であり、
上記Ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は３〜２０％であり、
前記有機基材の片面に塗布して形成される乾燥膜は、二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、乾燥膜厚は４５〜２００ｎｍの範囲であり、
前記被覆膜が被覆された前記有機基材の透過率は、前記被覆膜が無い場合の透過率と比べて１．５％以上高いことを特徴とする有機基材の透過率向上被覆膜。 A coating film coated on a transparent to translucent organic substrate.
The main component of the coating film is
A) At least one organic compound of 1-methoxy-2-propanol and cyclic ether,
B) At least one inorganic compound of amorphous silicon dioxide and silicon hydride,
And
The coating film has at least one inorganic compound of borate and nitrate, or an alkaline earth metal salt.
In the organic compound of 1-methoxy-2-propanol or cyclic ether of A) above, the composition ratio of 1-methoxy-2-propanol is 80% or less, and the composition ratio of cyclic ether is 8% or less.
In at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in B) above, the composition ratio of one or two kinds combined is 3 to 20%.
The dry film formed by coating on one side of the organic substrate is a film composed of aggregates of silicon dioxide fine particles, has a minute space of air, and has a dry film thickness in the range of 45 to 200 nm. Yes,
The transmittance of the organic base material coated with the coating film is 1.5% or more higher than the transmittance without the coating film, and the transmittance of the organic base material is improved. film.
前記被覆膜の主成分は、
Ａ）１−メトキシ−２−プロパノール及び環状エーテルの少なくとも一種の有機化合物、
Ｂ）非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物、
であり、
前記被覆膜は、硼酸塩と硝酸塩の少なくとも一種の無機化合物、或は、アルカリ土類金属塩を有し、
上記Ａ）の１−メトキシ−２−プロパノールまたは環状エーテルの有機化合物において、１−メトキシ−２−プロパノールの組成比は８０％以下であり、環状エーテルの組成比は８％以下であり、
上記Ｂ）の非晶質二酸化珪素及び水素化珪素の少なくとも一種の無機化合物において、１種または２種合算の組成比は３〜２０％であり、
前記有機基材の両面に塗布して形成される乾燥膜は、二酸化ケイ素微粒子の集合体により構成された膜であり、空気の微小な空間が存在し、それぞれの乾燥膜厚の平均値が５０〜２００ｎｍであり、
前記被覆膜が被覆された前記有機基材の透過率は、前記被覆膜が無い場合の透過率と比べて３％以上高いことを特徴とする有機基材の透過率向上被覆膜。
A coating film coated on a transparent to translucent organic substrate.
The main component of the coating film is
A) At least one organic compound of 1-methoxy-2-propanol and cyclic ether,
B) At least one inorganic compound of amorphous silicon dioxide and silicon hydride,
And
The coating film has at least one inorganic compound of borate and nitrate, or an alkaline earth metal salt.
In the organic compound of 1-methoxy-2-propanol or cyclic ether of A) above, the composition ratio of 1-methoxy-2-propanol is 80% or less, and the composition ratio of cyclic ether is 8% or less.
In at least one kind of inorganic compound of amorphous silicon dioxide and silicon hydride in B) above, the composition ratio of one or two kinds combined is 3 to 20%.
The dry film formed by coating on both sides of the organic substrate is a film composed of aggregates of silicon dioxide fine particles, and there is a minute space of air, and the average value of each dry film thickness is 50. ~ 200 nm
A coating film for improving the transmittance of an organic base material, wherein the transmittance of the organic base material coated with the coating film is 3 % or more higher than the transmittance without the coating film.
The above-mentioned coating liquid used in the method for improving the transmittance according to claim 1 or 2 .
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