JP2000005607A - Photocatalyst and illumination device - Google Patents
Photocatalyst and illumination deviceInfo
- Publication number
- JP2000005607A JP2000005607A JP10322420A JP32242098A JP2000005607A JP 2000005607 A JP2000005607 A JP 2000005607A JP 10322420 A JP10322420 A JP 10322420A JP 32242098 A JP32242098 A JP 32242098A JP 2000005607 A JP2000005607 A JP 2000005607A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- intermediate layer
- resin
- film
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 47
- 238000005286 illumination Methods 0.000 title abstract 2
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 125000000962 organic group Chemical group 0.000 claims abstract description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920002050 silicone resin Polymers 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims abstract description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000001699 photocatalysis Effects 0.000 claims description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 4
- 239000000113 methacrylic resin Substances 0.000 abstract description 2
- 229910052814 silicon oxide Inorganic materials 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 229920001296 polysiloxane Polymers 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000006276 transfer reaction Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光触媒膜を用いた
光触媒体および照明装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalyst using a photocatalytic film and a lighting device.
【０００２】[0002]
【従来の技術】従来、この種の光触媒体としてはたとえ
ば国際公開ＷＯ９６／２９３７５号公報に記載の構成が
知られている。2. Description of the Related Art Conventionally, as a photocatalyst of this type, for example, a configuration described in International Publication WO96 / 29375 is known.
【０００３】この国際公開ＷＯ９６／２９３７５号公報
には、樹脂製の基体の表面にシリコーン層にグラスカ
（日本合成ゴム製 商品名）を含有する二酸化チタンの
光触媒膜を形成した親水性の光触媒膜が記載されてい
る。[0003] This International Publication WO96 / 29375 discloses a hydrophilic photocatalyst film in which a titanium dioxide photocatalyst film containing Glasca (trade name, manufactured by Nippon Synthetic Rubber) is formed on a silicone substrate on the surface of a resin substrate. Has been described.
【０００４】そして、この光触媒体は、表面を親水性に
して防曇性を向上させるとともに、シリコーン層を形成
して光触媒膜の光触媒作用により樹脂製の基体が劣化す
ることを防止するものである。The photocatalyst has a hydrophilic surface to improve the antifogging property, and forms a silicone layer to prevent the resin base from being deteriorated by the photocatalytic action of the photocatalytic film. .
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、一般に
樹脂製の基体とシリコーン樹脂層のシリカとは膨張率が
異なるので、シリコーン樹脂の種類または層の形成条件
によって温度変化による膨張により樹脂製の基体からシ
リコーン層が剥離してしまうおそれがある。However, since the resin base and the silica of the silicone resin layer generally have different expansion coefficients, the resin base is expanded by the temperature change depending on the type of the silicone resin or the conditions for forming the layer. The silicone layer may peel off.
【０００６】また、上述の国際公開ＷＯ９６／２９３７
５号公報に記載のグラスカは、鉛筆硬度が２Ｈでこれら
の熱膨張差を吸収できず、剥離しやすい。Further, the above-mentioned international publication WO 96/2937.
Glasca described in Japanese Patent Publication No. 5 has a pencil hardness of 2H and cannot absorb these differences in thermal expansion, and is easily peeled.
【０００７】一方、樹脂製の基体からシリコーン層が剥
離することを防止するためにシリコーン層を薄く形成す
ると、光触媒膜からシリコーン層を十分に保護できず、
樹脂製の基体を劣化させてしまうおそれがある。On the other hand, if the silicone layer is formed thin in order to prevent the silicone layer from peeling off from the resin substrate, the silicone layer cannot be sufficiently protected from the photocatalytic film.
There is a possibility that the resin base may be deteriorated.
【０００８】本発明は、上記問題点に鑑みなされたもの
で、樹脂製の基体を保護しつつ中間層の剥離を防止した
光触媒体および照明装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a photocatalyst and an illuminating device in which the intermediate layer is prevented from peeling while protecting the resin-made base.
【０００９】[0009]
【課題を解決するための手段】請求項１記載の光触媒体
は、樹脂製の基体と；この基体の表面上に形成され有機
基（Ｒ）とケイ素（Ｓｉ）との組成比（Ｒ／Ｓｉ）が
１．１ないし１．５のシリコーン樹脂を主成分として膜
厚０．５μｍないし３０μｍで形成された中間層と；酸
化チタンを主成分とする光触媒膜とを具備しているもの
である。According to a first aspect of the present invention, there is provided a photocatalyst comprising: a resin base; and a composition ratio (R / Si) of an organic group (R) and silicon (Si) formed on the surface of the base. ) Comprising an intermediate layer formed of a silicone resin having a thickness of 1.1 to 1.5 and having a thickness of 0.5 to 30 μm; and a photocatalyst film mainly containing titanium oxide.
【００１０】そして、樹脂製の基体の表面上に形成され
た中間層の有機基（Ｒ）とケイ素（Ｓｉ）との組成比
（Ｒ／Ｓｉ）を１．１より小さくすると、有機基が少な
くなり無機に近付いてクラックを生じたり中間層が樹脂
製の基体から剥離しやすく、１．５より大きくすると、
有機基が光触媒膜と反応して中間層と光触媒膜との間で
光触媒作用を生じ、光触媒膜の表面での光触媒作用が低
下し、膜厚が３０μｍより厚いとチョーキングを生じた
り剥離を生じやすく、膜厚が０．５μｍより薄いと光触
媒膜から樹脂製の基体を十分に保護できないので、有機
基とケイ素（Ｓｉ）との組成比（Ｒ／Ｓｉ）を１．１な
いし１．５とし、膜厚を膜厚０．５μｍないし３０μｍ
とする。When the composition ratio (R / Si) of the organic group (R) and silicon (Si) of the intermediate layer formed on the surface of the resin substrate is smaller than 1.1, the organic group is reduced. When it becomes closer to inorganic, cracks occur or the intermediate layer is easily peeled off from the resin base, and when it is larger than 1.5,
The organic group reacts with the photocatalytic film to cause a photocatalytic action between the intermediate layer and the photocatalytic film, and the photocatalytic action on the surface of the photocatalytic film decreases, and when the film thickness is more than 30 μm, chalking or peeling easily occurs. If the thickness is less than 0.5 μm, the resin base cannot be sufficiently protected from the photocatalytic film, so that the composition ratio (R / Si) of the organic group and silicon (Si) is set to 1.1 to 1.5, When the film thickness is 0.5 μm to 30 μm
And
【００１１】請求項２記載の光触媒体は、請求項１記載
の光触媒体において、中間層は、シリコーン樹脂にメチ
ルフェニルシリコーンレジンが用いられているので、可
視光線の屈折率が樹脂製の基体と光触媒膜の中間となる
ため、可視光線の透過率が向上する。According to a second aspect of the present invention, in the photocatalyst according to the first aspect, since the methylphenylsilicone resin is used as the silicone resin for the intermediate layer, the refractive index of visible light is reduced to the resin base. Since it is located between the photocatalyst films, the transmittance of visible light is improved.
【００１２】請求項３記載の光触媒体は、請求項１また
は２記載の光触媒体において、基体は、中間層の熱膨張
係数とほぼ同等のアクリル樹脂であるもので、アクリル
樹脂が中間層から剥離しにくい。According to a third aspect of the present invention, there is provided a photocatalyst according to the first or second aspect, wherein the substrate is an acrylic resin having substantially the same thermal expansion coefficient as that of the intermediate layer. Hard to do.
【００１３】請求項４記載の光触媒体は、請求項１ない
し３いずれか一記載の光触媒体において、光触媒膜は、
シリカ（ＳｉＯ2 ）を含有するもので、結合力が向上し
て耐剥離性が向上するとともに親水性が向上して防曇性
を得ることができる。A photocatalyst according to a fourth aspect is the photocatalyst according to any one of the first to third aspects, wherein the photocatalyst film comprises:
Since it contains silica (SiO 2 ), the bonding strength is improved, the peeling resistance is improved, and the hydrophilicity is improved, so that anti-fogging properties can be obtained.
【００１４】請求項５記載の照明装置は、器具本体と；
この器具本体に取り付けられる請求項１ないし４いずれ
か一記載の光触媒体を透光性カバーとを具備しているも
ので、それぞれの作用を奏する。A lighting device according to a fifth aspect of the present invention includes a lighting device main body;
The photocatalyst according to any one of claims 1 to 4, which is attached to the apparatus main body, includes a light-transmitting cover, and performs the respective functions.
【００１５】[0015]
【発明の実施の形態】以下、本発明の一実施の形態を図
面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.
【００１６】図１は透光性カバーの断面図、図２は照明
装置の正面図、図３は上側カバーを外した状態の平面図
である。FIG. 1 is a cross-sectional view of a translucent cover, FIG. 2 is a front view of a lighting device, and FIG. 3 is a plan view of a state in which an upper cover is removed.
【００１７】図２および図３に示すように、照明装置と
しての街路灯で、11はほぼ球形の灯体で、この灯体11は
路面などの地上に設置される図示しないポールの上端に
取り付けられるもので、灯体11内にはランプ12および反
射体13が配置されている。As shown in FIGS. 2 and 3, a street light as a lighting device, 11 is a substantially spherical lamp, and this lamp 11 is attached to the upper end of a pole (not shown) installed on the ground such as a road surface. The lamp 12 includes a lamp 12 and a reflector 13.
【００１８】また、灯体11は、上側カバー15および透光
性カバーとしての下側カバー16を有し、これら上側カバ
ー15および下側カバー16が環状のフレーム17を介して着
脱可能に組み合わせられ、ほぼ球形に構成される。な
お、下側カバー16とフレーム17とが一体的に構成され、
このフレーム17に対して上側カバー15が着脱可能に取り
付けられる。The lamp body 11 has an upper cover 15 and a lower cover 16 as a light-transmitting cover. The upper cover 15 and the lower cover 16 are detachably combined via an annular frame 17. , And is formed in a substantially spherical shape. In addition, the lower cover 16 and the frame 17 are integrally configured,
The upper cover 15 is detachably attached to the frame 17.
【００１９】そして、上側カバー15は、遮光性あるいは
透光性を有し、遮光性を有する場合には内面が反射面に
形成される。下側カバー16は透光性を有するグローブに
よって構成され、ランプ12から発せられた光が透過する
透光部18として構成されている。さらに、下側カバー16
の下部にはポールに取り付けられるホルダ19が取り付け
られている。The upper cover 15 has a light-shielding property or a light-transmitting property. When the upper cover 15 has a light-shielding property, the inner surface is formed as a reflective surface. The lower cover 16 is formed of a glove having a light transmitting property, and is formed as a light transmitting portion 18 through which light emitted from the lamp 12 is transmitted. In addition, the lower cover 16
A holder 19 attached to a pole is attached to the lower part of the box.
【００２０】また、ランプ12は、たとえばメタルハライ
ドランプ、高圧ナトリウムランプなどが用いられ、下側
カバー16のホルダ19側に配置されたソケット20に接続さ
れ、上側カバー15と下側カバー16との境界部分より下側
の下側カバー16の部分に配置される。The lamp 12 is, for example, a metal halide lamp, a high-pressure sodium lamp, or the like. The lamp 12 is connected to a socket 20 arranged on the holder 19 side of the lower cover 16, and a boundary between the upper cover 15 and the lower cover 16. The lower cover 16 is disposed below the portion.
【００２１】さらに、反射体13は、ランプ12の中心軸に
対して回転方向の断面形状が放物面形状にアルミ鏡面材
によって形成され、図示しない取付金具によって灯体11
に支持されている。なお、取付金具は灯体11のフレーム
17またはホルダ19のいずれに支持されてもよく、上側カ
バー15を外した状態で反射体13の位置調整などが容易に
できる。Further, the reflector 13 is made of an aluminum mirror material having a parabolic cross section in the direction of rotation with respect to the center axis of the lamp 12, and the reflector 11 is mounted by a mounting bracket (not shown).
It is supported by. The mounting bracket is the frame of the lamp body 11.
It may be supported by either the holder 17 or the holder 19, and the position of the reflector 13 can be easily adjusted with the upper cover 15 removed.
【００２２】そして、反射体13は反射面がランプ12の中
心軸周りに対向されるとともに、反射面が下方に向くよ
うに傾けて配置される。The reflector 13 is arranged so that the reflection surface faces around the central axis of the lamp 12 and is inclined so that the reflection surface faces downward.
【００２３】また、下側カバー16は、図１に示すよう
に、屈折率が１．４９、透過率が９３％で、厚さ３ｍｍ
の軟化点１２０℃の耐熱性メタクリル樹脂などのアクリ
ルの樹脂製の基体21に、屈折率が１．３〜１．６、透過
率が８５％のメチルフェニルシリコーンレジンなどが用
いられたシリコーン樹脂で膜厚１μｍの中間層22が形成
され、この中間層22の表面に平均粒径７ｎｍの酸化チタ
ン（Ｔｉ０2 ）を主成分とし屈折率が１．７５、透過率
が９０％で、膜厚１μｍの光触媒膜23が形成されてい
る。As shown in FIG. 1, the lower cover 16 has a refractive index of 1.49, a transmittance of 93%, and a thickness of 3 mm.
A base resin 21 made of an acrylic resin such as a heat-resistant methacrylic resin having a softening point of 120 ° C. is made of a silicone resin using a methylphenyl silicone resin having a refractive index of 1.3 to 1.6 and a transmittance of 85%. An intermediate layer 22 having a thickness of 1 μm is formed. On the surface of the intermediate layer 22, titanium oxide (TiO 2 ) having an average particle diameter of 7 nm as a main component has a refractive index of 1.75, a transmittance of 90%, and a thickness of 1 μm. Is formed.
【００２４】なお、中間層22のシリコーン樹脂および光
触媒膜23は、それぞれスプレー後に乾燥させて約１００
〜１２０℃の温度で焼成して成膜し、膜厚は溶質に対す
る溶媒の量を異ならせて設定し、中間層22のシリコーン
樹脂については光触媒膜23を乾燥、焼成する際に熱衝撃
による応力集中により亀裂が生じない硬化の早さで硬度
が適切なものを選択する。The silicone resin and the photocatalyst film 23 of the intermediate layer 22 are dried after spraying to about 100
A film is formed by firing at a temperature of about 120 ° C., and the film thickness is set by changing the amount of the solvent with respect to the solute. For the silicone resin of the intermediate layer 22, the stress caused by thermal shock when the photocatalytic film 23 is dried and fired Select one that has an appropriate hardness at the fast curing time that does not cause cracks due to concentration.
【００２５】なお、中間層22および光触媒膜23を下側カ
バー16の基体21の軟化点付近の温度で焼成することによ
り、下側カバー16の成形歪みを同時に除去することが可
能である。By firing the intermediate layer 22 and the photocatalytic film 23 at a temperature near the softening point of the base 21 of the lower cover 16, it is possible to simultaneously remove the molding distortion of the lower cover 16.
【００２６】そして、メチルフェニルシリコーンレジン
などのシリコーン樹脂は、炭素（Ｃ）および水素（Ｈ）
などで構成される有機基（Ｒ）とケイ素（Ｓｉ）との組
成比（Ｒ／Ｓｉ）が、１．２ないし１．６の範囲内であ
る。また、この組成比の測定方法には元素分析および熱
重量分析とにより特定する。Silicone resins such as methylphenylsilicone resin include carbon (C) and hydrogen (H).
The composition ratio (R / Si) of the organic group (R) and silicon (Si) composed of, for example, is in the range of 1.2 to 1.6. The composition ratio is determined by elemental analysis and thermogravimetric analysis.
【００２７】さらに、シリコーン樹脂の中間層22の鉛筆
硬度は３Ｂより軟らかく、シリコーン樹脂の重量減少率
は１０００℃の空気中昇温で２０％ないし４０％であ
る。Further, the pencil hardness of the intermediate layer 22 of the silicone resin is softer than 3B, and the weight reduction rate of the silicone resin is 20% to 40% when the temperature in the air is increased to 1000 ° C.
【００２８】次に、上記実施の形態の作用について説明
する。Next, the operation of the above embodiment will be described.
【００２９】まず、ランプ12の点灯により、下側カバー
16の透光部18に直接向かう光が透過して灯体11の外部に
照射され、反射体13に向かう光が反射体13の反射面で反
射された後に下側カバー16の透光部18を透過して灯体11
の外部に照射される。また、上側カバー15が遮光性を有
する場合すなわち内面が反射面に形成されている場合に
は光が反射され、透光性を有する場合には光が透過して
灯体11の外部に照射される。First, the lower cover is turned on by turning on the lamp 12.
The light that directly goes to the light-transmitting portion 18 of the lower cover 16 is transmitted through and radiated to the outside of the lamp body 11, and the light that goes to the reflector 13 is reflected by the reflecting surface of the reflector 13. Light 11
Irradiated outside. When the upper cover 15 has a light-blocking property, that is, when the inner surface is formed on a reflective surface, light is reflected, and when the upper cover 15 has a light-transmitting property, the light is transmitted and radiated to the outside of the lamp body 11. You.
【００３０】そして、屋外に配設されると埃や自動車の
排気ガスなどの影響を受け、下側カバー16の外面にたと
えば埃、カーボンおよびオイルミストや、また、雰囲気
中のアセトアルデヒト、メチルメルカプタン、硫化水素
あるいはアンモニアなどの物質が付着する。しかし、下
側カバー16の外面には光触媒膜23が形成されているた
め、ランプ12からの紫外線あるいは太陽光が光触媒膜23
に照射されると、光触媒膜23の光触媒作用により、光触
媒膜23に付着あるいは接触した物質の酸化、分解が促進
される。When installed outdoors, it is affected by dust and exhaust gas from automobiles. For example, dust, carbon and oil mist on the outer surface of the lower cover 16 and acetoaldehyde and methyl mercaptan in the atmosphere are removed. And substances such as hydrogen sulfide and ammonia adhere. However, since the photocatalyst film 23 is formed on the outer surface of the lower cover 16, ultraviolet light or sunlight from the lamp 12 is
Is irradiated, the photocatalytic action of the photocatalytic film 23 promotes the oxidation and decomposition of the substance attached to or in contact with the photocatalytic film 23.
【００３１】すなわち、光触媒膜23に約４１０ｎｍ以下
の紫外線が照射されると、チタニア結晶は、約３．０Ｖ
のバンドギャップを有するので、このバンドギャップに
よりチタニア微粒子に電子ホールが生じ、この電子ホー
ルの移動により表面に電子移動反応が生じる。この電子
移動反応ではホールがバンドギャップ分のエネルギーに
相当する電子を引き抜く力、すなわち酸化力を持ってい
るため、このホールの酸化力によってチタニア結晶の表
面に付着あるいは接触した物質を変化させる。That is, when the photocatalyst film 23 is irradiated with ultraviolet rays of about 410 nm or less, the titania crystal becomes about 3.0 V
, An electron hole is generated in the titania fine particles by the band gap, and the movement of the electron hole causes an electron transfer reaction on the surface. In this electron transfer reaction, the hole has a power to pull out electrons corresponding to the energy corresponding to the band gap, that is, an oxidizing power. Therefore, the oxidizing power of the hole changes a substance attached or contacted to the surface of the titania crystal.
【００３２】このように、チタニア結晶は紫外線を受け
ると強い酸化力を生じるため、チタニア結晶の表面に付
着した汚れとなる粒子や粉塵の物質、または、アセトア
ルデヒト、メチルメルカプタン、硫化水素あるいはアン
モニアなどの物質の酸化、分解を促進する。そのため、
光触媒膜23の表面は常にクリーンな状態に保たれ、下側
カバー16の光の透過率の低下を抑制できるとともに、下
側カバー16の表面を拭くなどの清掃を頻繁にせずに済
み、メンテナンスを容易にできる。特に屋外に配設され
ると降雨により分解された物質が洗い流されるため、自
己浄化作用が一層促進される。As described above, the titania crystal generates a strong oxidizing power when exposed to ultraviolet rays. Therefore, dirt particles and dust attached to the surface of the titania crystal, or acetoaldehyde, methyl mercaptan, hydrogen sulfide, ammonia, etc. Promotes oxidation and decomposition of substances. for that reason,
The surface of the photocatalyst film 23 is always kept in a clean state, so that the lowering of the light transmittance of the lower cover 16 can be suppressed.In addition, frequent cleaning such as wiping the surface of the lower cover 16 can be avoided, and maintenance can be performed. Easy. In particular, when disposed outdoors, the substances decomposed by rainfall are washed away, so that the self-purifying action is further promoted.
【００３３】また、下側カバー16は光触媒膜23と基体21
との間に中間層22を形成しているため、光触媒膜23の光
触媒作用により基体21が劣化するのを防止できる。The lower cover 16 comprises a photocatalytic film 23 and a base 21.
Since the intermediate layer 22 is formed between the substrate 21 and the substrate 21, the deterioration of the base 21 due to the photocatalytic action of the photocatalytic film 23 can be prevented.
【００３４】なお、基体21の表面上に形成された中間層
22の有機基とシリコンとの比を１．１より小さくすると
有機基が少なくなりすぎて無機に近くなりクラックを生
じたり中間層が樹脂製の基体から剥離しやすく、ＪＩＳ
碁盤目剥離試験の結果が好ましくなく、１．５より大き
くすると固まりにくくなり光触媒膜23を形成できず、さ
らに、中間層22と光触媒膜23との間には保護膜がないた
め中間層22の有機基が光触媒膜23と反応して中間層22と
光触媒膜23との間で光触媒作用を生じ、光触媒膜23の表
面での光触媒作用が低下する。The intermediate layer formed on the surface of the substrate 21
When the ratio of the organic group to silicon is smaller than 1.1, the organic group becomes too small and becomes inorganic, causing cracks, and the intermediate layer is easily peeled off from the resin base.
The result of the cross-cut peeling test is not preferable, and if it is larger than 1.5, it hardly hardens and the photocatalyst film 23 cannot be formed, and further, since there is no protective film between the intermediate layer 22 and the photocatalyst film 23, the intermediate layer 22 The organic group reacts with the photocatalyst film 23 to cause a photocatalysis between the intermediate layer 22 and the photocatalyst film 23, and the photocatalysis on the surface of the photocatalyst film 23 is reduced.
【００３５】また、中間層22の膜厚は１μｍとしたが、
３０μｍより厚いと剥離を生じやすく、０．５μｍより
薄いと光触媒膜23と基体21とが接触するおそれがあり、
光触媒膜23から樹脂製の基体21を十分に保護できない。The thickness of the intermediate layer 22 is 1 μm.
If it is thicker than 30 μm, peeling is likely to occur, and if it is thinner than 0.5 μm, the photocatalyst film 23 may come into contact with the base 21,
The resin base 21 cannot be sufficiently protected from the photocatalytic film 23.
【００３６】さらに、シリコーン樹脂の中間層22の鉛筆
硬度を３Ｂより軟らかくすることにより、鉛筆硬度が２
Ｈのグラスカに比べ、熱膨張率差を吸収できるため、剥
離しにくくできる。Further, by making the pencil hardness of the intermediate layer 22 of the silicone resin softer than 3B, the pencil hardness becomes 2
Since the difference in the coefficient of thermal expansion can be absorbed as compared with the glass caps of H, peeling can be made difficult.
【００３７】またさらに、光触媒膜23には、酸化ケイ素
（ＳｉＯ2 ）を含有させてもよく、防曇性を有する親水
性膜とすることができ、中間層22と光触媒膜23との化学
的結合力も強化できる。Further, the photocatalyst film 23 may contain silicon oxide (SiO 2 ) and can be a hydrophilic film having anti-fog properties. The bonding strength can also be strengthened.
【００３８】なお、上側カバー15にも光触媒膜を形成し
てもよく、さらに上側カバー15が透光性を有する場合に
は、上側カバー15も下側カバー16と同様に形成すれば同
様の効果が得られる。A photocatalytic film may be formed on the upper cover 15. If the upper cover 15 has a light-transmitting property, the same effect can be obtained by forming the upper cover 15 in the same manner as the lower cover 16. Is obtained.
【００３９】また、上記実施の形態では、照明装置につ
いて説明したが、樹脂成型品のほとんどに適用可能であ
り、特に屋外用には好適で、標識灯、看板灯、車両用光
学部品、センサ器具、光学レンズ、ミラーあるいはカメ
ラ装置などに適用できる。In the above-described embodiment, the lighting device has been described. However, the lighting device is applicable to almost all resin molded products, and is particularly suitable for outdoor use, and is used for sign lights, sign lights, vehicle optical components, and sensor equipment. , An optical lens, a mirror or a camera device.
【００４０】[0040]
【発明の効果】請求項１記載の光触媒体によれば、樹脂
製の基体の表面上に形成された中間層の有機基（Ｒ）と
ケイ素（Ｓｉ）との組成比（Ｒ／Ｓｉ）を１．１より小
さくすると、有機基が少なくなり無機に近付いてクラッ
クを生じたり中間層が樹脂製の基体から剥離しやすく、
１．５より大きくすると、有機基が光触媒膜と反応して
中間層と光触媒膜との間で光触媒作用を生じ、光触媒膜
の表面での光触媒作用が低下し、膜厚が３０μｍより厚
いとチョーキングを生じたり剥離を生じやすく、膜厚が
０．５μｍより薄いと光触媒膜から樹脂製の基体を十分
に保護できないので、有機基とケイ素（Ｓｉ）との組成
比（Ｒ／Ｓｉ）が１．１ないし１．５で、膜厚を膜厚
０．５μｍないし３０μｍとし、中間層の剥離を防止す
るとともに、光触媒作用を低下することなく樹脂製の基
体の劣化を防止できる。According to the photocatalyst of the first aspect, the composition ratio (R / Si) of the organic group (R) and the silicon (Si) of the intermediate layer formed on the surface of the resin base is determined. When it is smaller than 1.1, the number of organic groups decreases and the inorganic layer approaches the inorganic layer, causing cracks or the intermediate layer is easily peeled off from the resin base,
When it is larger than 1.5, the organic group reacts with the photocatalytic film to cause a photocatalytic action between the intermediate layer and the photocatalytic film, and the photocatalytic action on the surface of the photocatalytic film decreases, and when the film thickness is more than 30 μm, choking occurs. When the film thickness is less than 0.5 μm, the resin base cannot be sufficiently protected from the photocatalytic film. Therefore, the composition ratio (R / Si) between the organic group and silicon (Si) is 1. When the thickness is 1 to 1.5, the thickness is set to 0.5 μm to 30 μm to prevent peeling of the intermediate layer and prevent deterioration of the resin base without lowering the photocatalytic action.
【００４１】請求項２記載の光触媒体によれば、請求項
１記載の光触媒体に加え、中間層はシリコーン樹脂にメ
チルフェニルシリコーンレジンを用いているので、可視
光線の屈折率が樹脂製の基体と光触媒膜の中間となり、
可視光線の透過率を向上できる。According to the photocatalyst of the second aspect, in addition to the photocatalyst of the first aspect, since the intermediate layer uses methylphenylsilicone resin for the silicone resin, the refractive index of visible light is made of resin. And the middle of the photocatalyst film,
Visible light transmittance can be improved.
【００４２】請求項３記載の光触媒体によれば、請求項
１または２記載の光触媒体に加え、基体は中間層の熱膨
張係数とほぼ同等のアクリル樹脂であるので、アクリル
樹脂が中間層から剥離することを防止できる。According to the photocatalyst of the third aspect, in addition to the photocatalyst of the first or second aspect, the base is an acrylic resin having substantially the same thermal expansion coefficient as that of the intermediate layer. Peeling can be prevented.
【００４３】請求項４記載の光触媒体によれば、請求項
１ないし３いずれか一記載の光触媒体に加え、触媒膜は
シリカを含有するので、結合力が向上して耐剥離性が向
上するとともに親水性が向上して防曇性を得ることがで
きる。According to the photocatalyst of the fourth aspect, in addition to the photocatalyst of any one of the first to third aspects, since the catalyst film contains silica, the bonding strength is improved and the peeling resistance is improved. At the same time, hydrophilicity is improved and anti-fogging property can be obtained.
【００４４】請求項５記載の照明装置によれば、器具本
体に取り付けられる請求項１ないし４いずれか一記載の
光触媒体を透光性カバーを具備しているので、それぞれ
の効果を奏する照明装置を提供することができる。According to the fifth aspect of the present invention, since the photocatalyst according to any one of the first to fourth aspects is provided with a light-transmitting cover, the illuminating apparatus exhibits each effect. Can be provided.
【図１】本発明の一実施の形態の透光性カバーを示す断
面図である。FIG. 1 is a sectional view showing a translucent cover according to an embodiment of the present invention.
【図２】同上照明装置を示す正面図である。FIG. 2 is a front view showing the lighting device.
【図３】同上照明装置の上側カバーを外した状態を示す
平面図である。FIG. 3 is a plan view showing a state where an upper cover of the lighting device is removed.
16 透光性カバーとしての下側カバー 21 基体 22 中間層 23 光触媒膜 16 Lower cover as translucent cover 21 Base 22 Intermediate layer 23 Photocatalytic film
Claims (5)
成され有機基（Ｒ）とケイ素（Ｓｉ）との組成比（Ｒ／
Ｓｉ）が１．１ないし１．５のシリコーン樹脂を主成分
として膜厚０．５μｍないし３０μｍで形成された中間
層と；酸化チタンを主成分とする光触媒膜と；を具備し
ていることを特徴とする光触媒体。1. A resin base; and a composition ratio (R / R) of an organic group (R) and silicon (Si) formed on the surface of the base.
Si) comprising an intermediate layer formed of a silicone resin having a thickness of 1.1 to 1.5 as a main component and having a thickness of 0.5 μm to 30 μm; and a photocatalytic film mainly containing titanium oxide. Characteristic photocatalyst.
ニルシリコーンレジンが用いられていることを特徴とす
る請求項１記載の光触媒体。2. The photocatalyst according to claim 1, wherein the intermediate layer comprises methylphenylsilicone resin as a silicone resin.
のアクリル樹脂であることを特徴とする請求項１または
２記載の光触媒体。3. The photocatalyst according to claim 1, wherein the substrate is an acrylic resin having substantially the same thermal expansion coefficient as that of the intermediate layer.
することを特徴とする請求項１ないし３いずれか一記載
の光触媒体。4. The photocatalyst according to claim 1, wherein the photocatalyst film contains silica (SiO 2 ).
れる請求項１ないし４いずれか一記載の光触媒体を透光
性カバーと；を具備していることを特徴とする照明装
置。5. An illuminating device comprising: an apparatus main body; and a light-transmissive cover for mounting the photocatalyst according to claim 1 attached to the apparatus main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10322420A JP2000005607A (en) | 1998-04-20 | 1998-11-12 | Photocatalyst and illumination device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10991198 | 1998-04-20 | ||
| JP10-109911 | 1998-04-20 | ||
| JP10322420A JP2000005607A (en) | 1998-04-20 | 1998-11-12 | Photocatalyst and illumination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000005607A true JP2000005607A (en) | 2000-01-11 |
Family
ID=26449614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10322420A Pending JP2000005607A (en) | 1998-04-20 | 1998-11-12 | Photocatalyst and illumination device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000005607A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006198466A (en) * | 2005-01-18 | 2006-08-03 | Jsr Corp | Photocatalytic sheet and illumination device using the same |
-
1998
- 1998-11-12 JP JP10322420A patent/JP2000005607A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006198466A (en) * | 2005-01-18 | 2006-08-03 | Jsr Corp | Photocatalytic sheet and illumination device using the same |
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