JP2002316090A - Method of forming coating film - Google Patents
Method of forming coating filmInfo
- Publication number
- JP2002316090A JP2002316090A JP2001122576A JP2001122576A JP2002316090A JP 2002316090 A JP2002316090 A JP 2002316090A JP 2001122576 A JP2001122576 A JP 2001122576A JP 2001122576 A JP2001122576 A JP 2001122576A JP 2002316090 A JP2002316090 A JP 2002316090A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- coating film
- hydrophilic
- substrate
- liquid
- 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.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 89
- 239000011248 coating agent Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims description 40
- 239000011941 photocatalyst Substances 0.000 claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 30
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 42
- 239000007921 spray Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000001699 photocatalysis Effects 0.000 description 14
- 229910010413 TiO 2 Inorganic materials 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000003039 volatile agent Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 102100028175 Abasic site processing protein HMCES Human genes 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 101001006387 Homo sapiens Abasic site processing protein HMCES Proteins 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、基材上に未塗布箇
所ができずに完全で均一な光触媒コーティング膜や親水
性コーティング膜を作成することができる方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a complete and uniform photocatalytic coating film or hydrophilic coating film without leaving uncoated portions on a substrate.
【０００２】[0002]
【従来の技術】光触媒コーティング膜や親水性コーティ
ング膜を作成する方法としては、従来から、基材にスプ
レーして乾燥させる方法、刷毛塗り法、ディップ法等が
知られており、既存のものへのコーティングでは、スプ
レーして乾燥させる方法及び刷毛塗り法が主に用いられ
ている。2. Description of the Related Art As a method for forming a photocatalytic coating film or a hydrophilic coating film, a method of spraying and drying a substrate, a brush coating method, a dip method, and the like are conventionally known. In the coating, a method of spraying and drying and a method of brushing are mainly used.
【０００３】また、光触媒のコーティングに関する従来
技術としては、例えば、特開平１０−９５６３５号公報
に、基材表面に有機チタネートを塗布した後、有機チタ
ネートを加水分解及び脱水縮重合させ、ついで、コロナ
放電又はプラズマ放電により残留有機基を除去し、その
後、タングステン酸含有水溶液を塗布して焼成を行うと
いう方法が開示されている。また、特開２０００−９５
９６９号公報には、光触媒粒子と、シリカ微粒子、シリ
コーン樹脂皮膜前駆体及びシリカ皮膜前駆体の少なくと
も１種を含有する組成物を自動車車体に既存の方法で塗
布するという技術が開示されている。[0003] As a conventional technique relating to photocatalyst coating, for example, JP-A-10-95635 discloses that after coating an organic titanate on a substrate surface, the organic titanate is subjected to hydrolysis and dehydration-condensation polymerization. A method is disclosed in which residual organic groups are removed by discharge or plasma discharge, and thereafter, an aqueous solution containing tungstic acid is applied and baked. Also, JP-A-2000-95
No. 969 discloses a technique of applying a composition containing photocatalyst particles, silica fine particles, a silicone resin film precursor, and at least one of a silica film precursor to an automobile body by an existing method.
【０００４】[0004]
【発明が解決しようとする課題】上述した既存のコーテ
ィング法では、いずれも専用の機具や塗布者の熟練度が
なければ、光彩が出るなど、純粋に透明な光触媒コーテ
ィング膜を作成することは困難であった。すなわち、従
来のコーティング法では、基材上に光触媒液が厚く塗布
された箇所や逆に全く塗布されていない箇所が生じてし
まい、光触媒未塗布箇所を残すことなく、均一な光触媒
コーティング膜を作成することは困難であった。In the above-mentioned existing coating methods, it is difficult to produce a purely transparent photocatalytic coating film, for example, with a glow without the special equipment and the skill of the applicator. Met. In other words, in the conventional coating method, a portion where the photocatalyst solution is applied thickly on the base material or a portion where the photocatalyst solution is not applied at all is generated, and a uniform photocatalyst coating film is formed without leaving the photocatalyst uncoated portion. It was difficult to do.
【０００５】本発明は上記の諸点に鑑みなされたもの
で、本発明の目的は、特に専用機具や熟練度を要するこ
となく、容易に、未塗布箇所のない完全で均一な光触媒
コーティング膜や親水性コーティング膜を作成すること
ができるコーティング膜作成方法を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a complete and uniform photocatalyst coating film without any unapplied portions and a hydrophilic film, without requiring special equipment and skill. An object of the present invention is to provide a coating film forming method capable of forming a functional coating film.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明のコーティング膜作成方法は、光触媒コー
ティング膜を基材上に作成するに際し、光触媒の原料で
ある酸化チタンを含む液をスプレー状で基材上に噴霧し
て光触媒液を基材上に塗布し、その直後に塗布面に水を
かけることによって光触媒液の厚塗り箇所から厚塗りと
なっている光触媒液のみを取り除き、均一な光触媒コー
ティング膜を作成するように構成されている（図１、図
２、図３参照）。Means for Solving the Problems In order to achieve the above-mentioned object, a method for producing a coating film of the present invention comprises the steps of: forming a photocatalyst coating film on a substrate; The photocatalyst liquid is applied to the substrate by spraying on the substrate in a spray form, and immediately thereafter, only the photocatalyst liquid which is thickly coated is removed from the thickly coated portion of the photocatalyst liquid by applying water to the application surface, It is configured to create a uniform photocatalytic coating film (see FIGS. 1, 2, and 3).
【０００７】また、本発明の方法は、光触媒コーティン
グ膜を基材上に作成するに際し、光触媒の原料である酸
化チタンを含む液を基材上に噴霧し、光触媒を基材上に
塗布した後に水を噴霧することにより、光触媒特有の親
水性の性質を利用して光触媒が塗布されていない箇所を
判別し、該箇所に光触媒液を噴霧して光触媒未塗布箇所
のない光触媒コーティング膜を作成することを特徴とし
ている（図４参照）。この場合、光触媒液の噴霧と水の
噴霧を繰り返して基材上に光触媒を塗布していく過程
で、光触媒特有の親水性の性質を利用し、光触媒未塗布
箇所のない光触媒コーティング膜を形成させることが好
ましい。Further, in the method of the present invention, when a photocatalyst coating film is formed on a substrate, a liquid containing titanium oxide, which is a raw material of the photocatalyst, is sprayed on the substrate, and the photocatalyst is coated on the substrate. By spraying water, a portion where the photocatalyst is not applied is determined by utilizing the hydrophilic property peculiar to the photocatalyst, and a photocatalyst solution is sprayed on the portion to form a photocatalyst coating film having no photocatalyst uncoated portion. (See FIG. 4). In this case, in the process of applying the photocatalyst onto the substrate by repeating the spraying of the photocatalyst liquid and the spraying of the water, a photocatalyst coating film having no photocatalyst uncoated portions is formed by utilizing the hydrophilic property peculiar to the photocatalyst. Is preferred.
【０００８】上記のように、光触媒の原料である酸化チ
タンを含む液をスプレー状で基材上に噴霧し、基材上で
液中の揮発分を蒸発させることで基材と光触媒を密着さ
せる過程において、光触媒液の噴霧直後に水を噴霧させ
ることで、基材上の光触媒液が厚く塗布された箇所を薄
くのばし、余分な光触媒液が取り除かれる。一般に、均
一な光触媒コーティング膜の作成には、専用の機材や塗
布者の熟練度を要するが、本発明の方法を用いれば、そ
のような専用の機材や熟練度を要することなく、容易に
基材上へ均一な光触媒コーティング膜を作成することが
可能となる。また、通常、透明の光触媒コーティング膜
の作成では、光触媒塗布箇所と光触媒未塗布箇所の区別
が非常につきにくいところが問題となっていたが、本発
明の方法を用いれば、光触媒液を塗布した後に水をかけ
ながら塗布するため、基材表面の親水性をすぐにチェッ
クすることが可能となり、光触媒の塗布時点で親水箇所
と非親水箇所の区別が容易にでき、光触媒未塗布箇所を
残すことなく、均一な光触媒コーティング膜を作成する
ことが可能となる。As described above, a liquid containing titanium oxide, which is a raw material of a photocatalyst, is sprayed onto a substrate in a spray form, and the volatile matter in the liquid is evaporated on the substrate to bring the substrate and the photocatalyst into close contact with each other. In the process, by spraying water immediately after the spraying of the photocatalyst liquid, a portion of the substrate on which the photocatalyst liquid has been applied thickly is thinned and excess photocatalyst liquid is removed. In general, the preparation of a uniform photocatalytic coating film requires specialized equipment and the skill of the applicator, but the method of the present invention can easily be used without the need for such specialized equipment and skill. It is possible to form a uniform photocatalytic coating film on the material. Also, in the preparation of a transparent photocatalyst coating film, there has been a problem that it is very difficult to distinguish between a photocatalyst-coated portion and a photocatalyst-uncoated portion. , It is possible to immediately check the hydrophilicity of the substrate surface, it is easy to distinguish hydrophilic and non-hydrophilic parts at the time of photocatalyst application, without leaving the photocatalyst uncoated part, It is possible to form a uniform photocatalytic coating film.
【０００９】また、本発明の方法は、親水性コーティン
グ膜を基材上に作成するに際し、コーティング膜の原料
である親水性液をスプレー状で基材上に噴霧して親水性
液を基材上に塗布し、その直後に塗布面に水をかけるこ
とによって親水性液の厚塗り箇所から厚塗りとなってい
る親水性液のみを取り除き、均一な親水性コーティング
膜を作成することを特徴としている。In the method of the present invention, when a hydrophilic coating film is formed on a substrate, the hydrophilic liquid, which is a raw material of the coating film, is sprayed onto the substrate in a spray form to apply the hydrophilic liquid to the substrate. It is characterized in that a uniform hydrophilic coating film is created by removing only the thick hydrophilic liquid from the thick liquid applying portion of the hydrophilic liquid by applying water to the application surface immediately after application on the upper surface. I have.
【００１０】また、本発明の方法は、親水性コーティン
グ膜を基材上に作成するに際し、コーティング膜の原料
である親水性液を基材上に噴霧して塗布した後に水を噴
霧することにより、塗布面の親水化性質を利用して親水
性コーティングがなされていない箇所を判別し、該箇所
に親水性液を噴霧して未塗布箇所のない親水性コーティ
ング膜を作成することを特徴としている。この場合、親
水性液の噴霧と水の噴霧を繰り返して基材上に親水性コ
ーティングを行う過程で、親水化性質を利用し、未塗布
箇所のない親水性コーティング膜を形成させることが好
ましい。In the method of the present invention, when a hydrophilic coating film is formed on a substrate, a hydrophilic liquid, which is a raw material of the coating film, is sprayed on the substrate and applied, followed by spraying water. By using the hydrophilic property of the application surface, it is characterized in that a portion having no hydrophilic coating is determined, and a hydrophilic liquid is sprayed on the portion to form a hydrophilic coating film having no uncoated portion. . In this case, it is preferable to form a hydrophilic coating film having no uncoated portions by utilizing the hydrophilic property in the process of performing hydrophilic coating on the substrate by repeatedly spraying the hydrophilic liquid and water.
【００１１】なお、親水性コーティング膜としては、酸
化チタン等を含む光触媒の他に、例えば、酸化ジルコニ
ウムなどの金属酸化物等が挙げられる。The hydrophilic coating film includes, for example, a metal oxide such as zirconium oxide in addition to a photocatalyst containing titanium oxide or the like.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明するが、本発明は下記の実施の形態に何ら限定さ
れるものではなく、適宜変更して実施することが可能な
ものである。まず、図面を参照しながら、本発明のコー
ティング膜作成方法について詳細に説明する。 （１）光触媒液噴霧 図１に示すように、基材１０の表面に光触媒液をスプレ
ー状に塗布した段階では、酸化チタン（ＴｉＯ2を含有
する液滴）１２が不均一に基材１０上に塗布され、不均
一なＴｉＯ2膜（光触媒層）が形成される。１４は光触
媒スプレー缶である。図２に示すように、光触媒液の塗
布直後は、基材表面に酸化チタンが強固に付着している
のに対し、厚塗り箇所の酸化チタン同士は弱い結合力で
付着している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications. . First, a method for forming a coating film of the present invention will be described in detail with reference to the drawings. (1) Spraying of Photocatalyst Liquid As shown in FIG. 1, at the stage where the photocatalyst liquid is applied to the surface of the base material 10 in a spray form, the titanium oxide (droplets containing TiO 2 ) 12 is unevenly formed on the base material 10. And a non-uniform TiO 2 film (photocatalyst layer) is formed. 14 is a photocatalyst spray can. As shown in FIG. 2, immediately after the application of the photocatalyst liquid, the titanium oxide is firmly attached to the surface of the base material, whereas the titanium oxide in the thickly applied portion is attached with a weak bonding force.
【００１３】（２）水噴霧 光触媒液を基材上に塗布した直後に水をかけると、光触
媒の親水性効果により水分子とＴｉＯ2分子が物理吸着
又は化学結合する。このときの結合力の大小は以下のよ
うに考えられる。 ＴｉＯ2−ＴｉＯ2＜ＴｉＯ2−Ｈ2Ｏ＜ＴｉＯ2−Ｍ（基
材） このように、酸化チタンと水の結合力は、酸化チタン同
士の結合力よりは強いが、酸化チタンと基材の結合力よ
りは弱いので、図３に示すように、水１６が流れ落ちる
際には、厚塗り箇所となっている酸化チタン１２同士の
結合は切れて水１６とともに流れ落ち、基材１０と酸化
チタン１２の結合は残ることになる。したがって、光触
媒塗布直後で（具体的には、揮発分が完全に蒸発してお
らず）酸化チタン同士の結合が不安定な状態のうちに水
をかけることによって、厚塗りとなっている酸化チタン
のみを取り除くことができ、均一な光触媒（ＴｉＯ2）
コーティング膜を容易に作成することが可能となる。(2) Water Spray When water is applied immediately after the photocatalyst liquid is applied onto the substrate, water molecules and TiO 2 molecules are physically adsorbed or chemically bonded due to the hydrophilic effect of the photocatalyst. The magnitude of the bonding force at this time is considered as follows. TiO 2 —TiO 2 <TiO 2 —H 2 O <TiO 2 -M (substrate) As described above, the binding force between titanium oxide and water is stronger than the binding force between titanium oxides, but the titanium oxide and the substrate As shown in FIG. 3, when the water 16 flows down, the bond between the titanium oxide 12 which is a thickly applied portion is broken and flows down together with the water 16, so that the base material 10 and the titanium oxide Twelve bonds will remain. Therefore, by applying water immediately after the application of the photocatalyst (specifically, the volatile components are not completely evaporated) while the bonding between the titanium oxides is unstable, the thick titanium oxide is applied. can be removed only, uniform photocatalyst (TiO 2)
It is possible to easily form a coating film.
【００１４】つぎに、基材上に厚塗り箇所のない均一な
光触媒コーティング膜を形成させた後に水を噴霧して光
触媒未塗布箇所を判別する手法について説明する（図４
参照）。 （１）水噴霧 光触媒未塗布部分のある基材１０に水を噴霧する。Next, a method of forming a uniform photocatalyst coating film without a thick coating portion on a base material and then spraying water to determine a photocatalyst uncoated portion will be described (FIG. 4).
reference). (1) Water Spraying Water is sprayed on the substrate 10 having the photocatalyst uncoated portion.
【００１５】（２）光触媒未塗布箇所の判別 光触媒（酸化チタン）未塗布箇所が撥水性の場合は、酸
化チタンの未塗布部分に水がかかっても水をはじき、水
膜の中に空隙が生じるので、その箇所が光触媒未塗布箇
所１８と判定できる。したがって、その箇所を重点的に
光触媒塗布を再度行うことにより、光触媒未塗布箇所の
ない完全で均一な光触媒コーティング膜を形成させるこ
とができる。光触媒（酸化チタン）未塗布箇所が撥水性
でない場合は、酸化チタンの塗布部分、未塗布部分の全
面に水膜が形成されるが、水膜が流れ落ちる段階で、酸
化チタン未塗布箇所の窪みに落ち込んだ水滴１６が残存
するので、その箇所が光触媒未塗布箇所２０と判定でき
る。したがって、その箇所を重点的に光触媒塗布を再度
行うことにより、光触媒未塗布箇所のない完全で均一な
光触媒コーティング膜を形成させることができる。この
ように、本手法では光触媒塗布時に水をかけながら塗布
を行うため、光触媒の塗り損ねの非常に少ない塗布方法
となる。(2) Judgment of the Photocatalyst Uncoated Area When the photocatalyst (titanium oxide) uncoated area is water-repellent, water is repelled even if water is applied to the titanium oxide uncoated area, and voids are formed in the water film. Therefore, the location can be determined as the photocatalyst-unapplied location 18. Therefore, by performing photocatalyst application again with emphasis on that portion, a complete and uniform photocatalyst coating film having no photocatalyst unapplied portion can be formed. If the photocatalyst (titanium oxide) -uncoated portion is not water-repellent, a water film is formed on the entire surface of the titanium oxide-coated portion and the non-coated portion. Since the dropped water droplets 16 remain, that portion can be determined as the photocatalyst-uncoated portion 20. Therefore, by performing photocatalyst application again with emphasis on that portion, a complete and uniform photocatalyst coating film having no photocatalyst unapplied portion can be formed. As described above, in the present method, the application is performed while water is applied at the time of applying the photocatalyst, and therefore, the application method is such that the photocatalyst is hardly misapplied.
【００１６】本発明の実施の一形態として、自動車の車
体に光触媒コーティング膜を作成する方法について記述
する。 （１） 光触媒コーティング膜を施す自動車の車体を十
分に洗浄する。このとき通常の洗剤でとれない水あか汚
れがある場合は、水あか分解用の洗剤等を用いて十分に
塗布面を洗浄する。なお、車体にワックス分が付着して
いる場合は、付着したワックス分も十分に取り除いてお
く。 （２） 洗浄後、水で濡れた状態のまま、光触媒の原料
である酸化チタンを含む液をスプレー状に車体面に噴霧
し、微細な液滴の形で車体面に光触媒液を付着させる。
このとき光触媒をできるだけ均一に塗布するために、ス
プレーノズルの先端と車体面との距離を、一例として、
約３０cm程度離す。この距離が近すぎると液中のアルコ
ール等の揮発分が車体面で多量に蒸発して光触媒が不均
一なままで密着してしまい、この距離が遠すぎると光触
媒液が車体面に充分に付着しないという不都合がある。
ただし、この距離は、スプレーの噴霧圧により前後す
る。As one embodiment of the present invention, a method for forming a photocatalytic coating film on an automobile body will be described. (1) Thoroughly clean the car body to be coated with the photocatalytic coating film. At this time, if there are scales that cannot be removed with a normal detergent, the coated surface is sufficiently washed using a detergent for decomposing scale. When wax is attached to the vehicle body, the attached wax is also sufficiently removed. (2) After washing, a liquid containing titanium oxide, which is a raw material of the photocatalyst, is sprayed on the body surface in a spray form while being wet with water, and the photocatalyst solution is attached to the body surface in the form of fine droplets.
At this time, in order to apply the photocatalyst as uniformly as possible, the distance between the tip of the spray nozzle and the body surface is, for example,
Separate about 30cm. If this distance is too short, a large amount of volatiles such as alcohol in the liquid evaporates on the vehicle body surface, causing the photocatalyst to adhere to the body in an uneven state. If this distance is too long, the photocatalyst liquid adheres sufficiently to the vehicle body surface. There is an inconvenience of not.
However, this distance depends on the spray pressure of the spray.
【００１７】（３） 車体面に付着した光触媒液は、液
中の揮発分が瞬時に蒸発し、その蒸発過程で光触媒の主
成分である酸化チタンが車体面に接着していくため、光
触媒液を噴霧した直後（例えば、約５〜２０秒以内）
に、光触媒塗布面全体に水をかけて洗い流す。なお、温
度が高いときは揮発分の蒸発が速いので、より迅速に水
噴霧を行う必要があり、逆に温度が低いときは揮発分の
蒸発が遅いので、水噴霧に多少の時間的余裕ができる。 （４） 車体面に光触媒液を塗布した直後では、光触媒
が車体面に強固に付着しておらず、特に厚塗りの状態で
付着している光触媒液は硬い接着がなされていないた
め、その上に水をかけることによって、厚塗りの部分の
光触媒液は車体側よりも噴霧される水と強固に物理吸着
又は化学結合し、厚塗り部分の光触媒液のみが噴霧した
水とともに車体から流れ落ちる。(3) In the photocatalyst liquid adhering to the vehicle body surface, volatile components in the liquid evaporate instantaneously, and titanium oxide which is a main component of the photocatalyst adheres to the vehicle body surface during the evaporation process. Immediately after spraying (for example, within about 5 to 20 seconds)
Then, water is applied to the entire photocatalyst-coated surface to wash it away. When the temperature is high, the evaporation of volatiles is fast, so it is necessary to spray water more quickly.On the contrary, when the temperature is low, evaporation of the volatiles is slow, so there is some time for water spraying. it can. (4) Immediately after the photocatalyst liquid is applied to the vehicle body surface, the photocatalyst is not firmly adhered to the vehicle body surface. Particularly, the photocatalyst solution adhered in a thick coating state is not hardly bonded. The photocatalyst liquid in the thickly painted portion is more strongly physically adsorbed or chemically bonded to the water sprayed from the vehicle body side, and only the photocatalyst solution in the thickly painted portion flows down from the vehicle body together with the sprayed water.
【００１８】（５） この作用により、光触媒液が厚塗
りされることなく、ほぼ均一に車体面に光触媒コーティ
ング膜が形成される。 （６） 本手法による光触媒コーティング膜作成方法を
車体面全体に適用することによって、車体面全体に薄く
均一な光触媒コーティング膜を形成させることが可能と
なる。(5) By this action, the photocatalyst coating film is formed almost uniformly on the vehicle body surface without thick coating of the photocatalyst liquid. (6) By applying the photocatalytic coating film forming method according to the present method to the entire vehicle body surface, it becomes possible to form a thin and uniform photocatalytic coating film on the entire vehicle body surface.
【００１９】（７） また、光触媒液をスプレー状に噴
霧するとともに水を噴霧しながら光触媒コーティング膜
を形成させていくが、光触媒液が付着していない車体面
は一般的に水をはじき、光触媒液が付着した車体面は水
になじむ性質を利用して、この光触媒コーティング膜の
作成時点で、上述したような手法を用いて光触媒塗布面
と光触媒未塗布面を識別することが可能となる。なお、
車体面の撥水性が落ちて水をあまりはじかない場合で
も、噴霧した水が流れ落ちる過程で光触媒未塗布部分の
窪みに水滴が残るため、同様に、光触媒塗布面と光触媒
未塗布面を識別することが可能である。 （８） この光触媒特有の親水性の性質を利用し、光触
媒未塗布面に対して重点的に光触媒を再塗布することに
よって、車体全体に光触媒未塗布箇所ができずに完全で
均一な光触媒コーティング膜を作成することが可能とな
る。(7) The photocatalyst coating film is formed while spraying the photocatalyst solution and spraying water, but the body surface to which the photocatalyst solution does not adhere generally repels water, Utilizing the property of the body surface to which the liquid has adhered to water, the photocatalyst-coated surface can be distinguished from the photocatalyst-uncoated surface at the time of forming the photocatalyst coating film by using the method described above. In addition,
Even if the water repellency of the car body surface drops and water does not repel much, water drops remain in the dents of the photocatalyst non-coated part as the sprayed water flows down. Is possible. (8) By taking advantage of the unique hydrophilic property of the photocatalyst, the photocatalyst is re-applied with emphasis on the photocatalyst-uncoated surface, so that there is no photocatalyst-uncoated portion on the entire vehicle body, and complete and uniform photocatalyst coating A film can be created.
【００２０】本実施の形態では、一例として、光触媒コ
ーティングを自動車の車体に適用する場合について説明
したが、本発明の方法の適用対象はこれに限定されるも
のではなく、例えば、窓ガラスや外壁等に適用すること
が可能である。In this embodiment, the case where the photocatalytic coating is applied to the body of an automobile has been described as an example. However, the application of the method of the present invention is not limited to this. Etc. can be applied.
【００２１】[0021]
【発明の効果】本発明は上記のように構成されているの
で、つぎのような効果を奏する。 （１） 光触媒液又は親水性液を基材上に噴霧した直後
に水をかけることにより、基材表面に薄く均一な光触媒
コーティング膜又は親水性コーティング膜を形成させる
ことができる。 （２） 光触媒液又は親水性液の噴霧と水の噴霧を繰り
返してコーティング膜を形成させていく過程で、光触媒
液又は親水性液の塗布面が親水性となる性質を利用し
て、光触媒液又は親水性液の未塗布箇所を判別すること
ができ、この未塗布箇所に重点的に再塗布を行うことに
より、基材表面に未塗布箇所ができずに光触媒コーティ
ング膜又は親水性コーティング膜を形成させることがで
きる。 （３） 専用機具や熟練度を要することなく、容易に、
未塗布箇所のない完全で均一な光触媒コーティング膜や
親水性コーティング膜を作成することができる。As described above, the present invention has the following effects. (1) A thin and uniform photocatalyst coating film or hydrophilic coating film can be formed on the surface of the substrate by spraying water immediately after spraying the photocatalyst liquid or the hydrophilic liquid onto the substrate. (2) In the process of forming a coating film by repeating spraying of a photocatalyst liquid or a hydrophilic liquid and spraying of water, a photocatalyst liquid is used by taking advantage of the property that the coated surface of the photocatalyst liquid or the hydrophilic liquid becomes hydrophilic. Alternatively, it is possible to determine an uncoated portion of the hydrophilic liquid, and by performing re-application mainly on the uncoated portion, the photocatalytic coating film or the hydrophilic coating film can be formed without an uncoated portion on the substrate surface. Can be formed. (3) Easily, without the need for specialized equipment or skill
A complete and uniform photocatalytic coating film or hydrophilic coating film without any uncoated portions can be formed.
【図１】本発明のコーティング膜作成方法の概念を模式
的に示す概略断面説明図（光触媒液をスプレー状に噴霧
した状態）である。FIG. 1 is a schematic cross-sectional explanatory view (in a state where a photocatalyst solution is sprayed) schematically showing the concept of a coating film forming method of the present invention.
【図２】本発明のコーティング膜作成方法の概念を模式
的に示す概略断面説明図（図１における結合力の関係）
である。FIG. 2 is a schematic cross-sectional explanatory view schematically showing the concept of the coating film forming method of the present invention (relationship of bonding force in FIG. 1).
It is.
【図３】本発明のコーティング膜作成方法の概念を模式
的に示す概略断面説明図（水を噴霧して光触媒の厚塗り
部を取り除く工程）である。FIG. 3 is a schematic cross-sectional explanatory view schematically showing a concept of a method of forming a coating film of the present invention (a step of spraying water to remove a thick-coated portion of a photocatalyst).
【図４】本発明のコーティング膜作成方法の概念を模式
的に示す概略断面説明図（水を噴霧して光触媒未塗布箇
所を判別する手法）である。FIG. 4 is a schematic cross-sectional explanatory view schematically showing a concept of a coating film forming method of the present invention (a method of determining a portion where a photocatalyst is not applied by spraying water).
１０ 基材 １２ 酸化チタン（ＴｉＯ2を含有する液滴） １４ 光触媒スプレー缶 １６ 水（水滴） １８、２０ 光触媒未塗布箇所Reference Signs List 10 base material 12 titanium oxide (droplets containing TiO 2 ) 14 photocatalyst spray can 16 water (waterdrop) 18, 20 photocatalyst uncoated portion
フロントページの続き (72)発明者 赤松 政彦 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 村上 明宏 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 新道 憲二郎 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 須田 信男 東京都港区浜松町２丁目４番１号 川崎重 工業株式会社東京本社内 (72)発明者 寺田 誠二 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 (72)発明者 荒西 義人 兵庫県明石市川崎町１番１号 川崎重工業 株式会社明石工場内 Ｆターム(参考） 4D075 AA01 BB79Z CA48 DC12 EA07 EC01 4G069 AA03 AA08 BA04A BA04B BA14A BA14B BA48A ED01 FA03 FA04 FB24 FB27 Continuing from the front page (72) Inventor Masahiko Akamatsu 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Akihiro Murakami 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside the plant (72) Inventor Kenjiro Shindo 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Inside the Akashi Plant (72) Inventor Nobuo Suda 2-4-1 Hamamatsucho, Minato-ku, Tokyo Kawasaki Heavy Industries Industrial Co., Ltd. (72) Inventor Seiji Terada 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside Akashi Plant (72) Inventor Yoshito Aranishi 1-1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. F term in Akashi factory (reference) 4D075 AA01 BB79Z CA48 DC12 EA07 EC01 4G069 AA03 AA08 BA04A BA04B BA14A BA14B BA48A ED01 FA03 FA04 FB24 FB27
Claims (6)
るに際し、光触媒の原料である酸化チタンを含む液をス
プレー状で基材上に噴霧して光触媒液を基材上に塗布
し、その直後に塗布面に水をかけることによって光触媒
液の厚塗り箇所から厚塗りとなっている光触媒液のみを
取り除き、均一な光触媒コーティング膜を作成すること
を特徴とするコーティング膜作成方法。When a photocatalyst coating film is formed on a substrate, a liquid containing titanium oxide, which is a raw material of the photocatalyst, is sprayed onto the substrate in a spray form, and the photocatalyst liquid is applied onto the substrate. A method for preparing a coating film, comprising: removing only a thick photocatalyst solution from a thick coating portion of a photocatalyst solution by applying water to the application surface to form a uniform photocatalyst coating film.
るに際し、光触媒の原料である酸化チタンを含む液を基
材上に噴霧し、光触媒を基材上に塗布した後に水を噴霧
することにより、光触媒特有の親水性の性質を利用して
光触媒が塗布されていない箇所を判別し、該箇所に光触
媒液を噴霧して光触媒未塗布箇所のない光触媒コーティ
ング膜を作成することを特徴とするコーティング膜作成
方法。2. When forming a photocatalyst coating film on a substrate, a liquid containing titanium oxide, which is a raw material of the photocatalyst, is sprayed on the substrate, and after applying the photocatalyst on the substrate, water is sprayed. The coating is characterized in that the photocatalyst is coated with a photocatalyst liquid by spraying a photocatalyst solution onto the portion where the photocatalyst is not applied by utilizing the hydrophilic property peculiar to the photocatalyst. Film making method.
基材上に光触媒を塗布していく過程で、光触媒特有の親
水性の性質を利用し、光触媒未塗布箇所のない光触媒コ
ーティング膜を形成させる請求項２記載のコーティング
膜作成方法。3. In the process of applying a photocatalyst onto a substrate by repeating spraying of a photocatalyst solution and spraying of water, a photocatalyst coating film having no photocatalyst uncoated portions is utilized by utilizing the hydrophilic property peculiar to the photocatalyst. 3. The method according to claim 2, wherein the coating film is formed.
るに際し、コーティング膜の原料である親水性液をスプ
レー状で基材上に噴霧して親水性液を基材上に塗布し、
その直後に塗布面に水をかけることによって親水性液の
厚塗り箇所から厚塗りとなっている親水性液のみを取り
除き、均一な親水性コーティング膜を作成することを特
徴とするコーティング膜作成方法。4. When forming a hydrophilic coating film on a substrate, a hydrophilic liquid as a raw material of the coating film is sprayed on the substrate in a spray form, and the hydrophilic liquid is applied on the substrate.
Immediately after that, the coating surface is coated with water to remove only the thickly coated hydrophilic liquid from the thickly coated portion of the hydrophilic liquid, thereby forming a uniform hydrophilic coating film. .
るに際し、コーティング膜の原料である親水性液を基材
上に噴霧して塗布した後に水を噴霧することにより、塗
布面の親水化性質を利用して親水性コーティングがなさ
れていない箇所を判別し、該箇所に親水性液を噴霧して
未塗布箇所のない親水性コーティング膜を作成すること
を特徴とするコーティング膜作成方法。5. When a hydrophilic coating film is formed on a substrate, a hydrophilic liquid, which is a raw material of the coating film, is sprayed onto the substrate and applied, and then water is sprayed on the substrate to make the coating surface hydrophilic. A method for producing a coating film, comprising: judging a portion where a hydrophilic coating is not applied by utilizing properties and spraying a hydrophilic liquid onto the portion to form a hydrophilic coating film having no uncoated portions.
基材上に親水性コーティングを行う過程で、親水化性質
を利用し、未塗布箇所のない親水性コーティング膜を形
成させる請求項５記載のコーティング膜作成方法。6. A process for forming a hydrophilic coating film having no uncoated portions by utilizing the hydrophilic property in a process of forming a hydrophilic coating on a substrate by repeatedly spraying a hydrophilic liquid and spraying water. 5. The coating film preparation method according to 5.
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|---|---|---|---|
| JP2001122576A JP3640901B2 (en) | 2001-04-20 | 2001-04-20 | Coating film creation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001122576A JP3640901B2 (en) | 2001-04-20 | 2001-04-20 | Coating film creation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006122757A (en) * | 2004-10-26 | 2006-05-18 | Matsushita Electric Works Ltd | Forming method of silicone resin coating film |
| CN100352562C (en) * | 2003-05-06 | 2007-12-05 | 株式会社不二机贩 | Photocatalyst coating method and photocatalyst coated article produced by such method |
-
2001
- 2001-04-20 JP JP2001122576A patent/JP3640901B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352562C (en) * | 2003-05-06 | 2007-12-05 | 株式会社不二机贩 | Photocatalyst coating method and photocatalyst coated article produced by such method |
| JP2006122757A (en) * | 2004-10-26 | 2006-05-18 | Matsushita Electric Works Ltd | Forming method of silicone resin coating film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3640901B2 (en) | 2005-04-20 |
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