JPH11156203A - Photocatalytic hydrophilic composition - Google Patents
Photocatalytic hydrophilic compositionInfo
- Publication number
- JPH11156203A JPH11156203A JP9321393A JP32139397A JPH11156203A JP H11156203 A JPH11156203 A JP H11156203A JP 9321393 A JP9321393 A JP 9321393A JP 32139397 A JP32139397 A JP 32139397A JP H11156203 A JPH11156203 A JP H11156203A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalytic
- composition
- hydrophilicity
- polyvinyl alcohol
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 23
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 23
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 6
- 238000007127 saponification reaction Methods 0.000 claims abstract description 4
- 239000006185 dispersion Substances 0.000 claims abstract 3
- 239000000377 silicon dioxide Substances 0.000 claims abstract 2
- 239000000758 substrate Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000000243 solution Substances 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 18
- 238000000576 coating method Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011941 photocatalyst Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002772 conduction electron Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- -1 hydroxyalkyl acrylate Chemical compound 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000000914 phenoxymethylpenicillanyl group Chemical group CC1(S[C@H]2N([C@H]1C(=O)*)C([C@H]2NC(COC2=CC=CC=C2)=O)=O)C 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Surface Treatment Of Glass (AREA)
- Catalysts (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は合成樹脂やガラス等
の基材表面に塗布することで表面を親水性にする光触媒
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 applying hydrophilicity to a surface of a base material such as synthetic resin or glass by applying the composition to the surface.
【０００２】[0002]
【従来の技術】合成樹脂やガラス等の基材表面は表面エ
ネルギーが比較的小さく、疎水性を呈する。このため、
表面に結露や曇りが生じる。このため合成樹脂等の基材
表面にコロナ放電処理を行って親水性を付与する物理的
な手段の試みもなされているが、満足な親水性は得られ
ていない。2. Description of the Related Art The surface of a substrate such as a synthetic resin or glass has a relatively small surface energy and exhibits hydrophobicity. For this reason,
Condensation or fogging on the surface. For this reason, physical means for imparting hydrophilicity by performing corona discharge treatment on the surface of a base material such as a synthetic resin have been attempted, but satisfactory hydrophilicity has not been obtained.
【０００３】そこで、一般的には以下のような手段にて
親水性を発揮するようにしている。 (1)熱可塑性合成樹脂材料で成形品を製造するにあた
り、界面活性剤のような親水性物質を練り込んでおく方
法。しかしながら、この方法では、親水性物質が水によ
って流されてしまい、短期間のうちに防曇性がなくなっ
てしまう。 (2)ポリビニルアルコール等の水溶性親水性物質を製品
表面に塗布する方法（特公昭４６−１３２５２号公
報）。アクリル酸ヒドロキシアルキルエステルを主成分
とする親水性ポリマーと界面活性剤とからなる組成物を
製品表面に塗布する方法（特公昭５０−６４３７号公
報）。しかしながら、これらの方法では、親水性物質が
加水分解を受けやすく耐水性に劣るため、充分な防曇効
果を発揮し得ない。 (3)ヒドロキシ基を有する親水性アクリル酸エステル系
重合体を架橋剤にて水不溶化する方法（特公昭５６−３
４２１９号公報）。しかしながら、この方法では、防曇
性自体が低下してしまう。 (4)アルミナゾルに界面活性剤を加えた組成物を成形品
表面に塗布する（特公昭４９−３２６６８号公報）。し
かしながら、この組成物は保存安定性に欠けるという欠
点がある。[0003] Therefore, in general, hydrophilicity is exerted by the following means. (1) A method in which a hydrophilic substance such as a surfactant is kneaded in producing a molded article from a thermoplastic synthetic resin material. However, in this method, the hydrophilic substance is washed away by the water, and the antifogging property is lost in a short time. (2) A method of applying a water-soluble hydrophilic substance such as polyvinyl alcohol to the product surface (Japanese Patent Publication No. 46-13252). A method comprising applying a composition comprising a hydrophilic polymer mainly composed of hydroxyalkyl acrylate and a surfactant to the product surface (Japanese Patent Publication No. 50-6437). However, in these methods, the hydrophilic substance is easily hydrolyzed and has poor water resistance, so that a sufficient antifogging effect cannot be exhibited. (3) A method of insolubilizing a hydrophilic acrylic acid ester-based polymer having a hydroxy group with a cross-linking agent (Japanese Patent Publication No. Sho 56-3)
No. 4219). However, in this method, the antifogging property itself is reduced. (4) A composition obtained by adding a surfactant to an alumina sol is applied to the surface of a molded article (Japanese Patent Publication No. 49-32668). However, this composition has the disadvantage of lacking storage stability.
【０００４】[0004]
【発明が解決しようとする課題】上述したように、従来
の親水性を付与する手段には種々の不具合があり、更に
従来の手段には共通して以下の課題がある。即ち、第１
に、従来の水性液を塗布・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。第２に、数１０μｍ以上の厚みで水性
液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に親水性の度合いが水との
接触角に換算してせいぜい１０°程度までしかならず、
充分な親水性を発揮することができない。As described above, the conventional means for imparting hydrophilicity have various disadvantages, and the conventional means have the following problems in common. That is, the first
Even if a conventional aqueous liquid is applied and dried to impart hydrophilicity to the surface of the synthetic resin, it is difficult to maintain the hydrophilicity for a long time, and once the hydrophilicity is lost, the hydrophilicity is maintained unless applied again. Does not recover. Secondly, since hydrophilicity is not exhibited unless the aqueous liquid is applied with a thickness of several tens of μm or more, if the aqueous liquid is applied with the thickness, white turbidity due to irregular reflection of light or color formation due to interference of light occurs. Third, the degree of hydrophilicity is only up to about 10 ° in terms of the contact angle with water,
Sufficient hydrophilicity cannot be exhibited.
【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、基材の表面に親水
性を付与する組成物であって、光触媒性金属酸化物粒子
とポリビニルアルコールとを水に分散させて構成され
る。Means for Solving the Problems To solve the above-mentioned problems, a photocatalytic hydrophilic composition according to the present invention is a composition for imparting hydrophilicity to the surface of a substrate, and comprises a photocatalytic metal oxide particle. It is constituted by dispersing polyvinyl alcohol in water.
【０００６】尚、塗膜の強度を向上させるためリン酸を
添加することが可能である。リン酸の添加量はポリビニ
ルアルコールに対して重量比で、５〜５０％とすること
が好ましい。５％未満では塗膜の強度が不足し、５０％
を超えると塗膜に白い斑点が生じやすくなる。[0006] Phosphoric acid can be added to improve the strength of the coating film. The amount of phosphoric acid to be added is preferably 5 to 50% by weight based on polyvinyl alcohol. If it is less than 5%, the strength of the coating film is insufficient, and 50%
When it exceeds, white spots tend to be formed on the coating film.
【０００７】ポリビニルアルコール（ＰＶＡ）のケン化
度は５０〜９０モル％であることが好ましい。完全ケン
化型ＰＶＡとＴiＯ2（光触媒性金属酸化物粒子）とを混
合する場合にはＴiＯ2の比率が高い方が水との接触角が
小さくなり、部分ケン化型ＰＶＡとＴiＯ2とを混合する
場合にはＰＶＡの比率が高い方が水との接触角が小さく
なる傾向にあることが実験の結果判明した。そして、ケ
ン化度を上記の範囲にすることで、暗所や製造直後の水
との接触角が小さくなる。The degree of saponification of polyvinyl alcohol (PVA) is preferably from 50 to 90 mol%. When fully saponified PVA and TiO 2 (photocatalytic metal oxide particles) are mixed, the higher the ratio of TiO 2 , the smaller the contact angle with water, and the more partially saponified PVA and TiO 2 are mixed. Experiments have shown that when mixing, the higher the ratio of PVA, the smaller the contact angle with water tends to be. By setting the degree of saponification in the above range, the contact angle with water in a dark place or immediately after production becomes small.
【０００８】また、本発明に係る光触媒性親水性組成物
には、シリカ粒子やアルミナ粒子を添加することが可能
である、これらシリカ粒子やアルミナ粒子を添加するこ
とで、膜の強度が向上する。Further, it is possible to add silica particles or alumina particles to the photocatalytic hydrophilic composition according to the present invention. By adding these silica particles or alumina particles, the strength of the film is improved. .
【０００９】また、水性液中の光触媒性金属酸化物粒子
は０．０１重量％以上〜１０重量％以下とするのが好ま
しい。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
って塗膜の結合強度を低下せしめることになる。また、
塗膜中の光触媒性金属酸化物粒子の量としては、１×１
０-7〜１×１０-3ｇ／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。[0009] The content of the photocatalytic metal oxide particles in the aqueous liquid is preferably 0.01% by weight to 10% by weight. When the proportion of the photocatalytic metal oxide particles is less than the above range, the hydrophilic action by the photocatalyst becomes insufficient, and even if it is added above the above range, the effect is not improved by the addition, but rather the bonding strength of the coating film is reduced. Will be. Also,
The amount of the photocatalytic metal oxide particles in the coating film was 1 × 1
0 -7 to 1 × 10 -3 g / cm 2 , preferably 5 × 10 -7 to
5 × 10 −4 g / cm 2 , more preferably 1 × 10 −6 to 1
× 10 −4 g / cm 2 .
【００１０】尚、本発明による親水化現象は以下の機構
によってもたらされる。即ち、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なじ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。[0010] The hydrophilization phenomenon according to the present invention is brought about by the following mechanism. That is, when light having energy equal to or 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 to generate conduction electrons and holes. I do. 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, substances having similar surface free energies are likely to adhere to each other, so that the surface on which water molecules are physically adsorbed is easily adapted to water. That is,
Such a surface will be hydrophilized.
【００１１】このように、本発明による親水性は、ポリ
ビニルアルコールに由来するよりも、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、ポリビニルア
ルコール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。As described above, it is considered that the hydrophilicity according to the present invention is due to the hydrophilizing action of the photocatalyst, rather than being derived from polyvinyl alcohol. This means that in order to exhibit hydrophilicity by polyvinyl alcohol, it had to be applied with a thickness of several tens of μm or more, but in the case of the composition according to the present invention, hydrophilicity was exhibited even at 0.4 μm or less. I can also agree.
【００１２】ここで、塗膜の厚みを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。Here, by setting the thickness of the coating film to 0.4 μm or less, it is possible to prevent white turbidity due to irregular reflection of light, and to further reduce the thickness to 0.2 μm or less to prevent interference by light. Coloring of the surface phase can be prevented.
【００１３】[0013]
【発明の実施の形態】以下の（表１）に示す４種類のＰ
ＶＡ（日本合成化学工業社製）を用意した。尚、粘度は
４％水溶液のものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Four types of P shown in the following (Table 1)
VA (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was prepared. The viscosity is that of a 4% aqueous solution.
【００１４】[0014]
【表１】 [Table 1]
【００１５】上記の各ＰＶＡにチタニアゾル（昭和電工
製、ｐＨ４、固形分濃度１０重量％）を以下の（表２）
に示す割合で混合し、この混合液を水に分散させて光触
媒性親水性組成物液を調製した。ＰＶＡとＴiＯ2との比
率、水に分散させた場合の固形分比、液の安定性、ガラ
ス板にフローコーティング法にて塗布した場合の膜の外
観、製膜直後の水との接触角、耐消しゴム摺動回数（耐
摩耗性）を以下の（表２）に示す。Titania sol (manufactured by Showa Denko, pH 4, solid content concentration 10% by weight) was added to each of the PVAs described above (Table 2).
And the mixture was dispersed in water to prepare a photocatalytic hydrophilic composition liquid. The ratio of PVA to TiO 2 , the solid content ratio when dispersed in water, the stability of the liquid, the appearance of the film when applied to a glass plate by the flow coating method, the contact angle with water immediately after film formation, The number of erase rubber sliding times (wear resistance) is shown in the following (Table 2).
【００１６】[0016]
【表２】 [Table 2]
【００１７】上記の（表２）からも明らかなように、Ｐ
ＶＡとチタニアゾルを含む水性液はｐＨを調製するまで
もなく安定しており、固形分比が８％のものを除いて膜
の外観も良好で、また製膜直後の親水性については、完
全ケン化型ＰＶＡ（NL-05，NH-26）はＴiＯ2の比率が高
い方が接触角が低く、部分ケン化型ＰＶＡ（GL-03，GH-
23）はＰＶＡの比率が高い方が接触角が低かった。更
に、ＰＶＡの重合度については、重合度が低い方が親水
性に優れ、また重合度が高い方が膜強度に優れることが
判明した。As is clear from the above (Table 2), P
The aqueous liquid containing VA and titania sol is stable without adjusting the pH, the appearance of the film is good except for those having a solid content ratio of 8%, and the hydrophilicity immediately after film formation is completely As for the modified PVA (NL-05, NH-26), the higher the ratio of TiO 2 , the lower the contact angle, and the partially saponified PVA (GL-03, GH-26).
In 23), the higher the ratio of PVA, the lower the contact angle. Furthermore, as for the degree of polymerization of PVA, it was found that the lower the degree of polymerization, the better the hydrophilicity, and the higher the degree of polymerization, the better the film strength.
【００１８】次に、上記の各膜に対して、０．５ｍＷ／
ｃｍ2の強度のＢＬＢランプ（紫外線ランプ）を２４時
間照射した結果、何れの膜も水との接触角は５°以下に
なった。この後、水との接触角が製膜直後の状態になる
まで暗所に放置し、この後再び０．５ｍＷ／ｃｍ2の強
度のＢＬＢランプを照射すると、再び水との接触角が５
°以下に戻った。Next, for each of the above films, 0.5 mW /
As a result of irradiating a BLB lamp (ultraviolet lamp) having an intensity of cm 2 for 24 hours, the contact angle of any of the films with water became 5 ° or less. Thereafter, the film was left in a dark place until the contact angle with water became a state immediately after film formation. Thereafter, irradiation with a BLB lamp having an intensity of 0.5 mW / cm 2 again caused the contact angle with water to become 5 again.
° returned to below.
【００１９】これに対し、重合度１７００のポリビニル
アルコールの５％水溶液５０ｃｃに８５％リン酸０．５
ｃｃを加えた溶液をガラス板にフローコーティング法に
て塗布した場合の膜については、紫外線を照射しても水
との接触角に変化は生じなかった。On the other hand, 85% phosphoric acid 0.5
Regarding the film when the solution containing cc was applied to the glass plate by the flow coating method, the contact angle with water did not change even when the film was irradiated with ultraviolet rays.
【００２０】更に、（表２）に示した各試料にシリカ粒
子を添加した。その結果、暗所での親水性維持効果が大
幅に向上した。また、シリカ粒子の代りにアルミナ粒子
を添加した場合にも暗所での親水性維持効果が向上し
た。Further, silica particles were added to each sample shown in (Table 2). As a result, the effect of maintaining hydrophilicity in a dark place was greatly improved. Further, when alumina particles were added instead of silica particles, the effect of maintaining hydrophilicity in a dark place was improved.
【００２１】また、（表２）に示した各試料にリン酸を
ポリビニルアルコールに対して重量比で５〜５０％の範
囲で添加した結果、耐消しゴム摺動回数（耐摩耗性）に
おいて、向上がみられた。Further, as a result of adding phosphoric acid to each of the samples shown in Table 2 in a weight ratio of 5 to 50% with respect to polyvinyl alcohol, the number of times of sliding of the eraser rubber (abrasion resistance) was improved. Was seen.
【００２２】[0022]
【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ポリビニルアルコールを水に分
散させて光触媒性親水性組成物を構成したので、基材に
対する塗膜の固着性が向上し、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。そして、特
にシリカ粒子やアルミナ粒子を添加することで、暗所で
の親水性維持効果が向上し、また膜の強度も向上する。As described above, according to the present invention, since the photocatalytic hydrophilic composition is formed by dispersing the photocatalytic metal oxide particles and polyvinyl alcohol in water, the adhesion of the coating film to the substrate is improved. In addition, the photocatalytic hydrophilic coating once formed can maintain a highly hydrophilized surface for a long period of time and can reduce the thickness of the coating, so that 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. In particular, by adding silica particles or alumina particles, the effect of maintaining hydrophilicity in a dark place is improved, and the strength of the film is also improved.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０８Ｋ 3/00 Ｃ０８Ｋ 3/00 3/22 3/22 Ｃ０８Ｌ 29/04 Ｃ０８Ｌ 29/04 Ａ //(Ｃ０８Ｋ 3/00 3:22 3:32） (Ｃ０８Ｋ 3/00 3:22 3:32 3:36） (72)発明者 宮内 雅浩 福岡県北九州市小倉北区中島２丁目１番１ 号 東陶機器株式会社内 (72)発明者 石橋 弘孝 福岡県北九州市小倉北区中島２丁目１番１ 号 東陶機器株式会社内──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI C08K 3/00 C08K 3/00 3/22 3/22 C08L 29/04 C08L 29/04 A // (C08K 3/00 3: (22:32) (C08K 3/00 3:22 3:32 3:36) (72) Inventor Masahiro Miyauchi 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Totoki Kiki Co., Ltd. (72) Inventor Hirotaka Ishibashi 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka
Claims (4)
あって、この組成物は、光触媒性金属酸化物粒子と、ポ
リビニルアルコールとを含有する水性分散液からなるこ
とを特徴とする光触媒性親水性組成物。1. A composition for imparting hydrophilicity to the surface of a substrate, wherein the composition comprises an aqueous dispersion containing photocatalytic metal oxide particles and polyvinyl alcohol. Photocatalytic hydrophilic composition.
あって、この組成物は、光触媒性金属酸化物粒子と、ポ
リビニルアルコールと、リン酸とを含有する水性分散液
からなることを特徴とする光触媒性親水性組成物。2. A composition for imparting hydrophilicity to the surface of a substrate, wherein the composition comprises an aqueous dispersion containing photocatalytic metal oxide particles, polyvinyl alcohol, and phosphoric acid. A photocatalytic hydrophilic composition comprising:
性親水性組成物において、この組成物にはシリカ粒子ま
たはアルミナ粒子が添加されてい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 silica or alumina particles are added to the composition.
親水性組成物において、前記ポリビニルアルコールのケ
ン化度は５０〜９０モル％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 polyvinyl alcohol has a saponification degree of 50 to 90 mol%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9321393A JPH11156203A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic hydrophilic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9321393A JPH11156203A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic hydrophilic composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11156203A true JPH11156203A (en) | 1999-06-15 |
Family
ID=18132056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9321393A Pending JPH11156203A (en) | 1997-11-21 | 1997-11-21 | Photocatalytic hydrophilic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11156203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001080974A (en) * | 1999-09-08 | 2001-03-27 | Fuji Photo Film Co Ltd | Composite base plate material and method for producing the same |
| WO2005014720A1 (en) * | 2003-08-12 | 2005-02-17 | Taiyo Kogyo Corporation | Photocatalyst dispersion liquid and method for producing same |
-
1997
- 1997-11-21 JP JP9321393A patent/JPH11156203A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001080974A (en) * | 1999-09-08 | 2001-03-27 | Fuji Photo Film Co Ltd | Composite base plate material and method for producing the same |
| WO2005014720A1 (en) * | 2003-08-12 | 2005-02-17 | Taiyo Kogyo Corporation | Photocatalyst dispersion liquid and method for producing same |
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