JPH11156206A - Photocatalytic coating film forming surface treating agent and formation of photocatalytic coating film using the same - Google Patents
Photocatalytic coating film forming surface treating agent and formation of photocatalytic coating film using the sameInfo
- Publication number
- JPH11156206A JPH11156206A JP9321397A JP32139797A JPH11156206A JP H11156206 A JPH11156206 A JP H11156206A JP 9321397 A JP9321397 A JP 9321397A JP 32139797 A JP32139797 A JP 32139797A JP H11156206 A JPH11156206 A JP H11156206A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- coating film
- photocatalytic coating
- photocatalytic
- water
- 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
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 21
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000080 wetting agent Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- 239000011941 photocatalyst Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 17
- 239000012756 surface treatment agent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 8
- 239000000057 synthetic resin Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- -1 alkyl silicate Chemical compound 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 230000001443 photoexcitation Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000007865 diluting Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は既存の窓ガラス、窓
枠、外壁のように、既に表面に汚染物質が付着している
基材や合成樹脂等のように表面が塗料をハジく傾向のあ
る基材の表面に光触媒性親水性被膜を形成するための表
面処理剤と、この表面処理剤を用いた光触媒被膜の形成
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface of a substrate, such as a window glass, a window frame, and an outer wall, which has a contaminant already adhered thereto or a synthetic resin. The present invention relates to a surface treatment agent for forming a photocatalytic hydrophilic film on a surface of a substrate, and a method for forming a photocatalytic film using the surface treatment agent.
【０００２】[0002]
【従来の技術】本発明者らは、ＰＣＴ／ＷＯ９６／２９
３７５号に開示したように、基材表面に光触媒層を形成
すると、光触媒の光励起に応じて前記層表面が、水との
接触角に換算して１０°以下という高度の親水性を呈す
ることを見出し、さらにそれによりガラス、レンズ、鏡
等の透明部材の防曇・視界確保性向上、物品表面の水洗
浄性・降雨洗浄性向上などの効果が得られることを見出
した。2. Description of the Related Art The present inventors have proposed PCT / WO96 / 29.
As disclosed in Japanese Patent No. 375, when a photocatalyst layer is formed on a substrate surface, the layer surface exhibits a high degree of hydrophilicity of 10 ° or less in terms of a contact angle with water in response to photoexcitation of the photocatalyst. Further, it has been found that effects such as improvement of anti-fog and improvement of visibility of transparent members such as glass, lens and mirror, and improvement of water washing property and rain washing property of an article surface can be obtained.
【０００３】また、光触媒層に紫外線を照射すると、価
電子帯にあった電子（ｅ-）が伝導帯に励起され、価電
子帯には正孔（ｈ+）が生じ、これら電子（ｅ-）及び正
孔（ｈ+）が酸化還元反応を促進することで、汚れ成分
を分解する作用があることは従来から知られている。When the photocatalyst layer is irradiated with ultraviolet light, electrons (e − ) in the valence band are excited to the conduction band, and holes (h + ) are generated in the valence band, and these electrons (e − ) are generated. ) And holes (h + ) have been known to promote the oxidation-reduction reaction, thereby decomposing dirt components.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、既存の
基材表面に光触媒層を形成しようとすると、既存の部材
表面には既に汚染物質が付着している場合が多く、その
汚染物質の影響で親水性を発揮する光触媒含有層を形成
するためのコーティング剤が弾かれたり、うまく固着し
なかったりして光触媒含有層の光励起による表面の親水
化機能や汚れ成分の分解機能が損なわれることがある。
また、表面に汚染物質が付着していなくとも合成樹脂の
表面等は表面エネルギーが低いためハジキ現象が起きて
しまい、薄く均一な光触媒被膜を形成することができな
い。However, when an attempt is made to form a photocatalyst layer on the surface of an existing substrate, there are many cases where a contaminant has already adhered to the surface of an existing member, and the surface of the existing member is hydrophilic. In some cases, the coating agent for forming the photocatalyst-containing layer exhibiting the property is repelled or does not adhere well, thereby impairing the function of hydrophilizing the surface by photoexcitation of the photocatalyst-containing layer and the function of decomposing dirt components.
Even if no contaminants are attached to the surface, the surface of the synthetic resin or the like has a low surface energy, so that a repelling phenomenon occurs, and a thin and uniform photocatalytic film cannot be formed.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記事情に鑑
みてなされたものであり、基材の表面に、光触媒含有層
を形成する前に、予め基材の表面に塗布され、基材の表
面を親水化して、最外側となる光触媒層の基材表面への
結合強度を向上させる表面処理剤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 circumstances, and is applied to a surface of a substrate in advance before forming a photocatalyst-containing layer on the surface of the substrate. It is an object of the present invention to provide a surface treatment agent that makes the surface of the surface of the photocatalyst hydrophilic so as to improve the bonding strength of the outermost photocatalytic layer to the substrate surface.
【０００６】上記課題を解決すべく本発明に係る光触媒
被膜形成用表面処理剤は、基材の表面に光触媒被膜を形
成する前に、当該表面の前処理を行うために塗布する表
面処理剤であって、この表面処理剤はシリカと、ポリビ
ニルアルコールと、湿潤剤とを水に分散させて構成され
る。[0006] In order to solve the above-mentioned problems, the surface treatment agent for forming a photocatalytic film according to the present invention is a surface treatment agent applied for performing a pretreatment of the surface before forming the photocatalytic film on the surface of the substrate. The surface treating agent is constituted by dispersing silica, polyvinyl alcohol, and a wetting agent in water.
【０００７】前記シリカとしては、アルカリ安定化シリ
カゾルの形態で添加し、前記湿潤剤としては、非イオン
性界面活性剤やアニオン性界面活性剤を用いる。また前
記シリカの割合は１０〜３０重量％、ポリビニルアルコ
ールの割合は１．０〜６重量％、湿潤剤の割合は０．２
５〜２．５重量％にするのが好ましい。The silica is added in the form of an alkali-stabilized silica sol, and the wetting agent is a nonionic surfactant or an anionic surfactant. The ratio of the silica is 10 to 30% by weight, the ratio of the polyvinyl alcohol is 1.0 to 6% by weight, and the ratio of the wetting agent is 0.2.
Preferably it is 5 to 2.5% by weight.
【０００８】ポリビニルアルコールの割合が上記範囲よ
りも少ないと、防汚性及び耐摩耗性が不充分になり、上
記範囲以上に添加すると、被膜に亀裂を生じやすい。ま
た、湿潤剤の濃度が上記範囲よりも少ないと、湿潤力が
弱く、上記範囲以上すると被膜がベトつく。[0008] When the proportion of polyvinyl alcohol is less than the above range, the antifouling property and abrasion resistance become insufficient, and when added above the above range, cracks tend to occur in the coating. When the concentration of the wetting agent is less than the above range, the wetting power is weak, and when the concentration is more than the above range, the film becomes sticky.
【０００９】光触媒被膜の形成方法としては、図１に示
すように、基材の表面を洗浄した後、当該表面に上記構
成の表面処理剤を塗布する。すると、基材の表面がある
程度親水化せしめられる。そこで、このある程度親水化
された表面に光触媒コーティング液を塗布し乾燥せしめ
ることで、基材表面に対する結合力に優れた光触媒層が
得られる。As a method for forming a photocatalytic film, as shown in FIG. 1, after cleaning the surface of a substrate, the surface treatment agent having the above-mentioned structure is applied to the surface. Then, the surface of the base material is made hydrophilic to some extent. Then, a photocatalyst coating solution is applied to the surface which has been made hydrophilic to some extent and dried to obtain a photocatalyst layer having excellent bonding strength to the substrate surface.
【００１０】[0010]
【発明の実施の形態】（実施例１）アンモニウム安定化
シリカゾル（粒径５ｎｍ）を２重量％、非イオン湿潤剤
（非イオン界面活性剤）を０．１重量％、残部を水とし
た水性液からなる表面処理剤を調製した。この表面処理
剤を既に使用されている合成樹脂製品の表面にスポンジ
拭きにより塗布した後、石原産業製光触媒コーティング
液ＳＴＫ０１（酸化チタン粒子８重量部とアルキルシリ
ケート２重量部と硝酸水溶液５４．８重量部とメタノー
ル２８重量部とプロパノール７．２重量部からなる組成
物）を溶媒（２−プロパノール９重量部とジアセトンア
ルコール１重量部との混合液）で１００倍に希釈して得
た光触媒コーティング液を、直径８ｍｍのエアガンを用
いて１０５ｍ2／ｇスプレーコーティング法により塗布
後、２０℃で２０分乾燥させることにより、光触媒層を
硬化させて試料を得た。上記試料について、光触媒層形
成後、３時間太陽光に晒すことにより、紫外線が照射さ
れるようにした後、水を噴霧したところ、水滴が形成さ
れず、水が一様に広がる様子が観察された。また、上記
試料を暗所に置いて水との接触角が３０°になった後、
再び紫外線を照射したところ、水との接触角は５°未満
に回復した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Example 1) Aqueous solution containing 2% by weight of an ammonium-stabilized silica sol (particle size: 5 nm), 0.1% by weight of a nonionic wetting agent (nonionic surfactant), and the balance water. A liquid surface treatment agent was prepared. After applying this surface treatment agent to the surface of the synthetic resin product already used by wiping with a sponge, a photocatalyst coating solution STK01 manufactured by Ishihara Sangyo (8 parts by weight of titanium oxide particles, 2 parts by weight of alkyl silicate and 54.8 parts by weight of nitric acid aqueous solution) Photocatalyst coating obtained by diluting 100 parts by weight, a composition comprising 28 parts by weight of methanol and 7.2 parts by weight of propanol) with a solvent (a mixed solution of 9 parts by weight of 2-propanol and 1 part by weight of diacetone alcohol). The solution was applied by a spray coating method of 105 m 2 / g using an air gun having a diameter of 8 mm, and then dried at 20 ° C. for 20 minutes to cure the photocatalyst layer to obtain a sample. After the photocatalyst layer was formed, the sample was exposed to sunlight for 3 hours after being irradiated with ultraviolet light, and then sprayed with water. As a result, it was observed that no water droplets were formed and the water spread evenly. Was. After the sample was placed in a dark place and the contact angle with water became 30 °,
Irradiation with ultraviolet light restored the contact angle with water to less than 5 °.
【００１１】（実施例２）アンモニウム安定化シリカゾ
ル（粒径５ｎｍ）を２．５重量％、非イオン湿潤剤（非
イオン界面活性剤）を０．１重量％、残部を水とした水
性液からなる表面処理剤を調製した。この表面処理剤を
既に使用されている合成樹脂製品の表面にスポンジ拭き
により塗布した後、石原産業製光触媒コーティング液Ｓ
ＴＫ０１（酸化チタン粒子８重量部とアルキルシリケー
ト２重量部と硝酸水溶液５４．８重量部とメタノール２
８重量部とプロパノール７．２重量部からなる組成物）
を溶媒（２−プロパノール９重量部とジアセトンアルコ
ール１重量部との混合液）で１００倍に希釈して得た光
触媒コーティング液を、直径８ｍｍのエアガンを用いて
１０５ｍ2／ｇスプレーコーティング法により塗布後、
２０℃で２０分乾燥させることにより、光触媒層を硬化
させて試料を得た。上記試料について、光触媒層形成
後、３時間太陽光に晒すことにより、紫外線が照射され
るようにした後、水を噴霧したところ、水滴が形成され
ず、水が一様に広がる様子が観察された。また、上記試
料を暗所に置いて水との接触角が３０°になった後、再
び紫外線を照射したところ、水との接触角は５°未満に
回復した。Example 2 An aqueous liquid containing 2.5% by weight of an ammonium-stabilized silica sol (particle size: 5 nm), 0.1% by weight of a nonionic wetting agent (nonionic surfactant), and the balance water. Was prepared. After applying this surface treatment agent to the surface of the synthetic resin product already used by wiping with a sponge, a photocatalyst coating solution S manufactured by Ishihara Sangyo Co., Ltd.
TK01 (8 parts by weight of titanium oxide particles, 2 parts by weight of alkyl silicate, 54.8 parts by weight of aqueous nitric acid solution, methanol 2
Composition comprising 8 parts by weight and 7.2 parts by weight of propanol)
Was diluted 100 times with a solvent (mixed solution of 9 parts by weight of 2-propanol and 1 part by weight of diacetone alcohol), and the photocatalyst coating solution obtained was spray-coated by a 105 m 2 / g spraying method using an air gun having a diameter of 8 mm. After application,
By drying at 20 ° C. for 20 minutes, the photocatalyst layer was cured to obtain a sample. After the photocatalyst layer was formed, the sample was exposed to sunlight for 3 hours after being irradiated with ultraviolet light, and then sprayed with water. As a result, it was observed that no water droplets were formed and the water spread evenly. Was. When the sample was placed in a dark place and the contact angle with water became 30 °, and the sample was irradiated with ultraviolet rays again, the contact angle with water recovered to less than 5 °.
【００１２】（実施例３）アンモニウム安定化シリカゾ
ル（粒径５ｎｍ）を２．５重量％、アニオン性界面活性
剤を０．０７５重量％、残部を水とした水性液からなる
表面処理剤を調製した。この表面処理剤を既に使用され
ている合成樹脂製品の表面にスポンジ拭きにより塗布し
た後、石原産業製光触媒コーティング液ＳＴＫ０１（酸
化チタン粒子８重量部とアルキルシリケート２重量部と
硝酸水溶液５４．８重量部とメタノール２８重量部とプ
ロパノール７．２重量部からなる組成物）を溶媒（２−
プロパノール９重量部とジアセトンアルコール１重量部
との混合液）で１００倍に希釈して得た光触媒コーティ
ング液を、直径８ｍｍのエアガンを用いて１０５ｍ2／
ｇスプレーコーティング法により塗布後、２０℃で２０
分乾燥させることにより、光触媒層を硬化させて試料を
得た。上記試料について、光触媒層形成後、３時間太陽
光に晒すことにより、紫外線が照射されるようにした
後、水を噴霧したところ、水滴が形成されず、水が一様
に広がる様子が観察された。また、上記試料を暗所に置
いて水との接触角が３０°になった後、再び紫外線を照
射したところ、水との接触角は５°未満に回復した。(Example 3) A surface treatment agent comprising an aqueous liquid containing 2.5% by weight of an ammonium-stabilized silica sol (particle size: 5 nm), 0.075% by weight of an anionic surfactant and the balance being water was prepared. did. After applying this surface treatment agent to the surface of the synthetic resin product already used by wiping with a sponge, a photocatalyst coating solution STK01 manufactured by Ishihara Sangyo (8 parts by weight of titanium oxide particles, 2 parts by weight of alkyl silicate and 54.8 parts by weight of nitric acid aqueous solution) Parts of methanol, 28 parts by weight of methanol and 7.2 parts by weight of propanol) in a solvent (2-
The photocatalyst coating liquid obtained by diluting 100 times with a mixed solution of 9 parts by weight of propanol and 1 part by weight of diacetone alcohol) was added to an air gun having a diameter of 8 mm to obtain 105 m 2 /
g After applying by spray coating method,
The sample was obtained by curing the photocatalyst layer by drying for a minute. After the photocatalyst layer was formed, the sample was exposed to sunlight for 3 hours after being irradiated with ultraviolet light, and then sprayed with water. As a result, it was observed that no water droplets were formed and the water spread evenly. Was. When the sample was placed in a dark place and the contact angle with water became 30 °, and the sample was irradiated with ultraviolet rays again, the contact angle with water recovered to less than 5 °.
【００１３】（比較例）既に使用されている合成樹脂製
品の表面に、洗浄処理をせずに、石原産業製光触媒コー
ティング液ＳＴＫ０１（酸化チタン粒子８重量部とアル
キルシリケート２重量部と硝酸水溶液５４．８重量部と
メタノール２８重量部とプロパノール７．２重量部から
なる組成物）を溶媒（２−プロパノール９重量部とジア
セトンアルコール１重量部との混合液）で１００倍に希
釈して得た光触媒コーティング液を、直径８ｍｍのエア
ガンを用いて１０５ｍ2／ｇスプレーコーティング法に
より塗布後、２０℃で２０分乾燥させることにより、光
触媒層を硬化させて試料を得た。上記試料について、光
触媒層形成後、３時間太陽光に晒すことにより、紫外線
が照射されるようにした後、水を噴霧してみたが、所々
水滴が弾かれたり付着してしまい、充分に親水化されて
いない様子が観察された。これは、光触媒が均一に塗布
されていないためと考えられる。Comparative Example A photocatalyst coating solution STK01 manufactured by Ishihara Sangyo (8 parts by weight of titanium oxide particles, 2 parts by weight of alkyl silicate and 54 parts of nitric acid aqueous solution) was applied to the surface of a synthetic resin product already used without washing. 2.8 parts by weight, 28 parts by weight of methanol and 7.2 parts by weight of propanol) diluted 100 times with a solvent (mixture of 9 parts by weight of 2-propanol and 1 part by weight of diacetone alcohol). The photocatalyst coating solution was applied by a spray coating method of 105 m 2 / g using an air gun having a diameter of 8 mm, and then dried at 20 ° C. for 20 minutes to cure the photocatalyst layer, thereby obtaining a sample. After the photocatalyst layer was formed, the sample was exposed to sunlight for 3 hours after being exposed to ultraviolet light, and then sprayed with water. An unconverted state was observed. This is probably because the photocatalyst was not uniformly applied.
【００１４】[0014]
【発明の効果】以上に説明した如く、本発明によれば、
シリカと、ポリビニルアルコールと、湿潤剤とを水に分
散させた表面処理剤を用いることにより、既存の基材や
合成樹脂からなる基材の表面に光触媒性親水性被膜を形
成する場合に、安定的に光触媒の光励起に応じた親水化
効果が発現されるようになる。As described above, according to the present invention,
By using a surface treatment agent in which silica, polyvinyl alcohol, and a wetting agent are dispersed in water, when a photocatalytic hydrophilic film is formed on the surface of an existing substrate or a substrate made of a synthetic resin, it is stable. As a result, a hydrophilizing effect corresponding to the photoexcitation of the photocatalyst is developed.
【図１】基材表面に光触媒被膜を形成する方法の一例を
示すブロック図FIG. 1 is a block diagram illustrating an example of a method for forming a photocatalytic film on a substrate surface.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０８Ｌ 29/04 Ｃ０８Ｌ 29/04 Ａ Ｃ０９Ｄ 129/04 Ｃ０９Ｄ 129/04 Ａ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI C08L 29/04 C08L 29/04 A C09D 129/04 C09D 129/04 A
Claims (5)
に、当該表面の前処理を行うために塗布する表面処理剤
であって、この表面処理剤はシリカと、ポリビニルアル
コールと、湿潤剤とを水に分散させてなることを特徴と
する光触媒被膜形成用表面処理剤。1. A surface treatment agent applied to perform a pretreatment of a surface before forming a photocatalytic film on a surface of a substrate, wherein the surface treatment agent is silica, polyvinyl alcohol, and a wetting agent. And water dispersed in water.
処理剤において、前記シリカはアルカリ安定化シリカゾ
ルの形態であることを特徴とする光触媒性親水性組成
物。2. The photocatalytic hydrophilic composition according to claim 1, wherein the silica is in the form of an alkali-stabilized silica sol.
処理剤において、前記湿潤剤は非イオン性界面活性剤ま
たはアニオン性界面活性剤であることを特徴とする光触
媒性親水性組成物。3. The photocatalytic hydrophilic composition according to claim 1, wherein the wetting agent is a nonionic surfactant or an anionic surfactant.
膜形成用表面処理剤において、前記シリカの割合は１０
〜３０重量％、ポリビニルアルコールの割合は１．０〜
６重量％、湿潤剤の割合は０．２５〜２．５重量％であ
ることを特徴とする光触媒被膜形成用表面処理剤。4. The photocatalytic film-forming surface treatment agent according to claim 1, wherein the ratio of the silica is 10%.
~ 30% by weight, the ratio of polyvinyl alcohol is 1.0 ~
A surface treating agent for forming a photocatalytic film, wherein 6% by weight and a proportion of a wetting agent are 0.25 to 2.5% by weight.
剤を基材の表面に塗布し、基材の表面を親水化した後
に、当該基材の表面に光触媒コーティング液を塗布する
ようにしたことを特徴とする光触媒被膜の形成方法。5. A photocatalyst coating liquid is applied to the surface of a substrate after applying the surface treatment agent according to claim 1 to the surface of the substrate and hydrophilizing the surface of the substrate. A method for forming a photocatalytic film, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9321397A JPH11156206A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic coating film forming surface treating agent and formation of photocatalytic coating film using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9321397A JPH11156206A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic coating film forming surface treating agent and formation of photocatalytic coating film using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11156206A true JPH11156206A (en) | 1999-06-15 |
Family
ID=18132101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9321397A Pending JPH11156206A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic coating film forming surface treating agent and formation of photocatalytic coating film using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11156206A (en) |
-
1997
- 1997-11-21 JP JP9321397A patent/JPH11156206A/en active Pending
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