JPH11128751A - Photocatalytic hydrophilic composition - Google Patents
Photocatalytic hydrophilic compositionInfo
- Publication number
- JPH11128751A JPH11128751A JP9298370A JP29837097A JPH11128751A JP H11128751 A JPH11128751 A JP H11128751A JP 9298370 A JP9298370 A JP 9298370A JP 29837097 A JP29837097 A JP 29837097A JP H11128751 A JPH11128751 A JP H11128751A
- Authority
- JP
- Japan
- Prior art keywords
- water
- composition
- synthetic resin
- photocatalytic
- hydrophilic composition
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 23
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000080 wetting agent Substances 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 13
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 150000004706 metal oxides Chemical class 0.000 claims description 9
- 239000002736 nonionic surfactant Substances 0.000 claims description 5
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 22
- 229920003002 synthetic resin Polymers 0.000 abstract description 19
- 239000000057 synthetic resin Substances 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract description 2
- 230000001846 repelling effect Effects 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
- 239000002519 antifouling agent Substances 0.000 description 5
- 239000011941 photocatalyst Substances 0.000 description 5
- 230000003373 anti-fouling effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002772 conduction electron Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 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
- DEIVNMVWRDMSMJ-UHFFFAOYSA-N hydrogen peroxide;oxotitanium Chemical compound OO.[Ti]=O DEIVNMVWRDMSMJ-UHFFFAOYSA-N 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は合成樹脂製品やガラ
ス製品等の物質の表面を長期間に亘って親水性に維持す
るための光触媒性親水性組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalytic hydrophilic composition for maintaining the surface of a substance such as a synthetic resin product or a glass product hydrophilic for a long period of time.
【０００２】[0002]
【従来の技術】多くの合成樹脂は表面エネルギーが比較
的小さく、疎水性を呈する。しかしながら、疎水性を呈
しても汚れは付着する。汚れの付着を少なくする防汚剤
として従来から過フッ素化合物が用いられてきたが、十
分な防汚性を発揮できなかった。また、シリカをベース
とした防汚性組成物も知られているが、耐摩耗性に劣
る。2. Description of the Related Art Many synthetic resins have a relatively low surface energy and exhibit hydrophobicity. However, even if it exhibits hydrophobicity, dirt adheres. Conventionally, perfluorinated compounds have been used as antifouling agents for reducing the adhesion of dirt, but they have failed to exhibit sufficient antifouling properties. Further, an antifouling composition based on silica is also known, but is inferior in abrasion resistance.
【０００３】そこで、特開昭６０−２３８３７９号公報
に、耐摩耗性に優れた防汚性組成物として、水を媒体と
し、これにシリカ、ポリビニルアルコール及び湿潤剤を
添加したものが提案されている。[0003] Japanese Patent Application Laid-Open No. Sho 60-238379 proposes an antifouling composition having excellent abrasion resistance in which water is used as a medium and silica, polyvinyl alcohol and a wetting agent are added thereto. I have.
【０００４】[0004]
【発明が解決しようとする課題】上述した特開昭６０−
２３８３７９号公報に防汚剤については、明細書中に特
に記載はないが、防汚剤は親水性を発揮して汚れの付着
を少なくする効果を発揮するものと思われる。しかしな
がら、第１に、親水性の度合いが水との接触角にそれほ
ど小さくならず充分な親水性を発揮することができな
い。第２に、数１０μｍ以上の厚みで防汚剤を塗布しな
いと親水性を発揮しないため、その厚みで塗布すると、
光の乱反射による白濁が生じたり、光の干渉による発色
が生じる。第３に、従来の防汚剤を塗布・乾燥せしめ、
合成樹脂表面に親水性が付与されても、長期間親水性を
維持するのは困難で、一旦親水性を失うと、再度塗布し
ない限り、親水性は回復しない。SUMMARY OF THE INVENTION The above-mentioned Japanese Unexamined Patent Publication No.
Although the antifouling agent is not particularly described in the specification in JP-A-238379, it is considered that the antifouling agent exhibits an effect of exhibiting hydrophilicity and reducing adhesion of dirt. However, first, the degree of hydrophilicity is not so small as to the contact angle with water, and sufficient hydrophilicity cannot be exhibited. Secondly, hydrophilicity is not exhibited unless the antifouling agent is applied at a thickness of several tens of μm or more.
White turbidity occurs due to irregular reflection of light, and coloring occurs due to interference of light. Third, apply and dry a conventional antifouling agent,
Even if hydrophilicity is imparted to the surface of the synthetic resin, it is difficult to maintain the hydrophilicity for a long period of time. Once the hydrophilicity is lost, the hydrophilicity is not restored unless it is applied again.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決すべく本
発明に係る光触媒性親水性組成物は、光触媒性金属酸化
物粒子と、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。Means for Solving the Problems To solve the above problems, a photocatalytic hydrophilic composition according to the present invention is obtained by dispersing photocatalytic metal oxide particles, silica, polyvinyl alcohol and a wetting agent in water. It is composed.
【０００６】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。The silica is added in the form of an alkali-stabilized silica sol, and a nonionic surfactant or an anionic surfactant is used as the wetting agent.
【０００７】また、光触媒性金属酸化物粒子の割合は
０．０１〜１０重量％、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％にするのが
好ましい。The ratio of the photocatalytic metal oxide particles is 0.01 to 10% by weight, and the ratio of the silica is 10 to 30% by weight.
It is preferable that the ratio of the polyvinyl alcohol is 1.0 to 6% by weight, and the ratio of the wetting agent is 0.25 to 2.5% by weight.
【０００８】光触媒性金属酸化物粒子の割合が上記範囲
よりも少ないと、光触媒による親水性作用が不十分とな
り、上記範囲以上に添加しても添加による効果向上はな
く、却って被膜の結合強度を低下せしめることになる。
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。If the proportion of the photocatalytic metal oxide particles is less than the above range, the hydrophilic effect of the photocatalyst becomes insufficient. Even if the content exceeds the above range, the effect is not improved by the addition. It will be lowered.
When the proportion of polyvinyl alcohol is less than the above range, the antifouling property and abrasion resistance become insufficient. 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】光触媒性金属酸化物粒子としては、例え
ば、アナターゼ型酸化チタン、ルチル型酸化チタン、ブ
ルカイト型酸化チタン、酸化亜鉛、酸化錫、酸化第二
鉄、三酸化二ビスマス、三酸化タングステン、チタン酸
ストロンチウム等が挙げられる。湿潤剤としては、陽イ
オン界面活性剤、非イオン界面活性剤及び両性界面活性
剤のいずれも使用できる。The photocatalytic metal oxide particles include, for example, anatase type titanium oxide, rutile type titanium oxide, brookite type titanium oxide, zinc oxide, tin oxide, ferric oxide, bismuth trioxide, tungsten trioxide, titanium trioxide. And strontium acid. As the wetting agent, any of a cationic surfactant, a nonionic surfactant and an amphoteric surfactant can be used.
【００１０】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水性液を合成樹脂表面に塗布
してもある程度の親水性は発揮されるが、光触媒性金属
酸化物粒子に光が照射されると、以下の機構により水と
の接触角で３０°以下、好条件下では実質的に１０°以
下になるまで親水化される。[0010] Although a certain degree of hydrophilicity is exhibited by applying an aqueous liquid obtained by dispersing silica, polyvinyl alcohol, and a wetting agent to water on the surface of the synthetic resin, light is applied to the photocatalytic metal oxide particles. When irradiated, it is hydrophilized by the following mechanism until the contact angle with water is 30 ° or less, and under favorable conditions it is substantially 10 ° or less.
【００１１】親水化現象は、光触媒の価電子帯上端と伝
導帯下端とのエネルギーギャップ以上のエネルギーを有
する光が光触媒に照射されると、光触媒の価電子帯中の
電子が励起されて伝導電子と正孔とが生成する。そし
て、その結果、表面に極性（おそらくは電子吸引性）が
付与される。それにより、表面に雰囲気との平衡以上の
量の水が化学吸着する。すると、その表面の水素結合に
基づく表面自由エネルギーが増加し、その表面自由エネ
ルギーの増加に応じた量の水分子がさらに物理吸着し、
表面に固定される。ところで、表面自由エネルギーが近
い物質同士は互いに接着しやすいことから、水分子が物
理吸着した表面は水に馴染みやすいものとなる。即ち、
そのような表面は親水化されることになる。The phenomenon of hydrophilization is that when light having an energy greater than the energy gap between the upper end of the valence band and the lower end of the conduction band of the photocatalyst is irradiated on the photocatalyst, the electrons in the valence band of the photocatalyst are excited and the conduction electrons are excited. And holes are generated. As a result, the surface is given a polarity (probably an electron-withdrawing property). As a result, an amount of water equal to or more than the equilibrium with the atmosphere is chemically adsorbed on the surface. Then, the surface free energy based on hydrogen bonding of the surface increases, and the amount of water molecules according to the increase in the surface free energy further physically adsorbs,
Fixed to the surface. By the way, since substances having similar surface free energies are likely to adhere to each other, the surface on which the water molecules are physically adsorbed is easily adapted to water. That is,
Such a surface will be hydrophilized.
【００１２】このように、本発明による親水性は、シリ
カと、ポリビニルアルコールと、湿潤剤を含む水性液に
由来するよりも、光触媒の親水化作用によるものと考え
られる。このことは、シリカと、ポリビニルアルコール
と、湿潤剤を含む水性液によって親水性を発揮するには
数１０μｍ以上の厚みで塗布しなければならなかった
が、本発明による組成物の場合には０．４μｍ以下でも
親水性を発揮することからも首肯できる。ここで、０．
４μｍ以下の厚みにすることで、光の乱反射による白濁
を防止することができ、更に０．２μｍ以下の厚みにす
ることで、光の干渉による表面相の発色を防止すること
ができる。尚、表面層中の光触媒性金属酸化物粒子の量
は、１×１０-7〜１×１０-3ｇ／ｃｍ2、好ましくは５
×１０-7〜５×１０-4ｇ／ｃｍ2、更に好ましくは１×
１０-6〜１×１０-4ｇ／ｃｍ2である。As described above, it is considered that the hydrophilicity according to the present invention is due to the hydrophilicity of the photocatalyst, rather than to the aqueous solution containing silica, polyvinyl alcohol and the wetting agent. This means that in order to exhibit hydrophilicity with an aqueous liquid containing silica, polyvinyl alcohol, and a wetting agent, the coating had to be applied with a thickness of several tens of μm or more. It can be confirmed from the fact that hydrophilicity is exhibited even when the thickness is .4 μm or less. Here, 0.
When the thickness is 4 μm or less, white turbidity due to irregular reflection of light can be prevented, and when the thickness is 0.2 μm or less, coloring of a surface phase due to light interference can be prevented. The amount of the photocatalytic metal oxide particles in the surface layer is 1 × 10 −7 to 1 × 10 −3 g / cm 2 , preferably 5 × 10 −3 g / cm 2 .
× 10 −7 to 5 × 10 −4 g / cm 2 , more preferably 1 ×
It is 10 -6 to 1 × 10 -4 g / cm 2 .
【００１３】[0013]
（実施例１）アナターゼ型チタニアを１．０重量％、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光触媒性親水性組
成物を調製し、この組成物を合成樹脂製品の表面に塗布
した。その結果、合成樹脂製品の表面の親水性は水との
接触角に換算して５°以下になった。また、暗所に当該
製品を１ヵ月放置したところ、水との接触角は約２０°
になった。そこで、紫外線を照射したところ１時間後に
水との接触角は再び５°以下になった。Example 1 1.0% by weight of anatase-type titania, 2% by weight of ammonium-stabilized silica sol (particle size: 5 nm), 0.1% by weight of a nonionic wetting agent (nonionic surfactant), and the balance water A photocatalytic hydrophilic composition comprising an aqueous liquid was prepared, and the composition was applied to the surface of a synthetic resin product. As a result, the hydrophilicity of the surface of the synthetic resin product became 5 ° or less in terms of the contact angle with water. When the product was left in a dark place for one month, the contact angle with water was about 20 °.
Became. Then, when irradiated with ultraviolet rays, the contact angle with water fell to 5 ° or less again after one hour.
【００１４】（比較例１）上記実施例１の組成からアナ
ターゼ型チタニアを除いた水性液を調製し、これを合成
樹脂製品の表面に塗布した。その結果、合成樹脂製品の
表面の親水性は水との接触角に換算して３０°になっ
た。また、当該製品を１ヵ月放置したところ、水との接
触角は約５０°になった。これに紫外線を照射しても水
との接触角に変化はなかった。(Comparative Example 1) An aqueous liquid was prepared by removing the anatase type titania from the composition of Example 1 described above, and applied to the surface of a synthetic resin product. As a result, the hydrophilicity of the surface of the synthetic resin product was 30 ° in terms of the contact angle with water. When the product was left for one month, the contact angle with water became about 50 °. Irradiation with ultraviolet light did not change the contact angle with water.
【００１５】（実施例２）ルチル型チタニアを１．０重
量％、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光触媒
性親水性組成物を調製し、この組成物を合成樹脂製品の
表面に塗布した。その結果、合成樹脂製品の表面の親水
性は水との接触角に換算して５°以下になった。また、
暗所に当該製品を１ヵ月放置したところ、水との接触角
は約２０°になった。そこで、紫外線を照射したところ
１時間後に水との接触角は再び５°以下になった。Example 2 1.0% by weight of rutile-type titania, 2.5% by weight of ammonium-stabilized silica sol (particle size: 5 nm), nonionic wetting agent (nonionic surfactant)
Was prepared in the form of an aqueous liquid containing 0.1% by weight of water and the balance water, and this composition was applied to the surface of a synthetic resin product. As a result, the hydrophilicity of the surface of the synthetic resin product became 5 ° or less in terms of the contact angle with water. Also,
When the product was left in a dark place for one month, the contact angle with water became about 20 °. Then, when irradiated with ultraviolet rays, the contact angle with water fell to 5 ° or less again after one hour.
【００１６】（比較例２）上記実施例２の組成からルチ
ル型チタニアを除いた水性液を調製し、これを合成樹脂
製品の表面に塗布した。その結果、合成樹脂製品の表面
の親水性は水との接触角に換算して３０°になった。ま
た、当該製品を１ヵ月放置したところ、水との接触角は
約５０°になった。これに紫外線を照射しても水との接
触角に変化はなかった。Comparative Example 2 An aqueous liquid was prepared by removing rutile-type titania from the composition of Example 2 above, and applied to the surface of a synthetic resin product. As a result, the hydrophilicity of the surface of the synthetic resin product was 30 ° in terms of the contact angle with water. When the product was left for one month, the contact angle with water became about 50 °. Irradiation with ultraviolet light did not change the contact angle with water.
【００１７】（実施例３）ブルカイト型チタニアを１０
重量％、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光触媒性親水性組
成物を調製し、この組成物を合成樹脂製品の表面に塗布
した。その結果、合成樹脂製品の表面の親水性は水との
接触角に換算して５°以下になった。また、暗所に当該
製品を１ヵ月放置したところ、水との接触角は約２０°
になった。そこで、紫外線を照射したところ１時間後に
水との接触角は再び５°以下になった。(Example 3) A brookite-type titania was added to 10
Wt%, ammonium stabilized silica sol (particle size 5nm)
, 2.5% by weight, 0.075% by weight of an anionic surfactant, and a balance of water to prepare a photocatalytic hydrophilic composition comprising an aqueous liquid, and this composition was applied to the surface of a synthetic resin product. . As a result, the hydrophilicity of the surface of the synthetic resin product became 5 ° or less in terms of the contact angle with water. When the product was left in a dark place for one month, the contact angle with water was about 20 °.
Became. Then, when irradiated with ultraviolet rays, the contact angle with water fell to 5 ° or less again after one hour.
【００１８】（比較例３）上記実施例３の組成からブル
カイト型チタニアを除いた水性液を調製し、これを合成
樹脂製品の表面に塗布した。その結果、合成樹脂製品の
表面の親水性は水との接触角に換算して３０°になっ
た。また、当該製品を１ヵ月放置したところ、水との接
触角は約５０°になった。これに紫外線を照射しても水
との接触角に変化はなかった。Comparative Example 3 An aqueous liquid was prepared by removing the brookite-type titania from the composition of Example 3 above, and applied to the surface of a synthetic resin product. As a result, the hydrophilicity of the surface of the synthetic resin product was 30 ° in terms of the contact angle with water. When the product was left for one month, the contact angle with water became about 50 °. Irradiation with ultraviolet light did not change the contact angle with water.
【００１９】[0019]
【発明の効果】以上に説明した如く本発明によれば、光
触媒性金属酸化物粒子と、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光触媒性親水性組成
物を構成したので、塗布の際には、合成樹脂製品等の被
塗装物表面に弾かれることなく、均一に且つ薄い光触媒
性親水性被膜を形成することができ、また、一旦形成さ
れた光触媒性親水性被膜は高度に親水化した表面を長期
に亘って維持でき、しかも被膜の厚みを薄くできるの
で、白濁や発色などの問題も生じない。更に、水性組成
物であるので、溶剤臭がなく、取り扱い性にも優れる。As described above, according to the present invention, a photocatalytic hydrophilic composition is formed by dispersing photocatalytic metal oxide particles, silica, polyvinyl alcohol, and a wetting agent in water. In application, a uniform and thin photocatalytic hydrophilic film can be formed without being repelled by the surface of an object to be coated such as a synthetic resin product. Since the highly hydrophilic surface can be maintained for a long period of time and the thickness of the coating can be reduced, there is no problem such as cloudiness or coloring. Furthermore, since it is an aqueous composition, it has no solvent odor and is excellent in handleability.
Claims (4)
ポリビニルアルコールと、湿潤剤とを水に分散させてな
る光触媒性親水性組成物。1. A photocatalytic metal oxide particle, silica,
A photocatalytic hydrophilic composition obtained by dispersing polyvinyl alcohol and a wetting agent in water.
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.
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.
親水性組成物において、前記光触媒性金属酸化物粒子の
割合は０．０１〜１０重量％、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性親水性組成物。4. The photocatalytic hydrophilic composition according to claim 1, wherein the proportion of the photocatalytic metal oxide particles is 0.01 to 10% by weight, and the proportion of the silica is 10%.
~ 30% by weight, the ratio of polyvinyl alcohol is 1.0 ~
6% by weight and a proportion of the wetting agent of 0.25 to 2.5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9298370A JPH11128751A (en) | 1997-10-30 | 1997-10-30 | Photocatalytic hydrophilic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9298370A JPH11128751A (en) | 1997-10-30 | 1997-10-30 | Photocatalytic hydrophilic composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11128751A true JPH11128751A (en) | 1999-05-18 |
Family
ID=17858819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9298370A Pending JPH11128751A (en) | 1997-10-30 | 1997-10-30 | Photocatalytic hydrophilic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11128751A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002088298A (en) * | 2000-09-13 | 2002-03-27 | Toto Ltd | Hydrophilic coating material |
| CN103771721A (en) * | 2012-10-18 | 2014-05-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of ultra-hydrophilic transparent SiO2/TiO2 antifog film |
| JP2018501105A (en) * | 2014-11-04 | 2018-01-18 | キム、ヒョク ジュンKIM, Hyeok Jung | One-pack photocatalyst coating composition and method for producing the same |
-
1997
- 1997-10-30 JP JP9298370A patent/JPH11128751A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002088298A (en) * | 2000-09-13 | 2002-03-27 | Toto Ltd | Hydrophilic coating material |
| CN103771721A (en) * | 2012-10-18 | 2014-05-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of ultra-hydrophilic transparent SiO2/TiO2 antifog film |
| CN103771721B (en) * | 2012-10-18 | 2015-10-28 | 上海纳米技术及应用国家工程研究中心有限公司 | The preparation method of ultra-hydrophilic transparent earth silicon/titanic oxide anti-fog thin film |
| JP2018501105A (en) * | 2014-11-04 | 2018-01-18 | キム、ヒョク ジュンKIM, Hyeok Jung | One-pack photocatalyst coating composition and method for producing the same |
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