JP3613639B2 - Antifouling treatment method for liquid crystal display screen - Google Patents
Antifouling treatment method for liquid crystal display screen Download PDFInfo
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- JP3613639B2 JP3613639B2 JP01464695A JP1464695A JP3613639B2 JP 3613639 B2 JP3613639 B2 JP 3613639B2 JP 01464695 A JP01464695 A JP 01464695A JP 1464695 A JP1464695 A JP 1464695A JP 3613639 B2 JP3613639 B2 JP 3613639B2
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- liquid crystal
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Description
【０００１】
【産業上の利用分野】
本発明は、液晶表示画面の防汚処理方法及び防汚処理された液晶表示画面に関する。
【０００２】
【従来の技術】
従来より、液晶表示画面は、パーソナルコンピューター、ワードプロセッサー、テレビ、キャッシュコーナーのタッチパネルなど、多方面で使用されている。この液晶表示画面は、一般にガラス基盤そのものや、ガラス基盤上に樹脂フィルムを接着し、さらにＳｉＯ２を蒸着させたものであり、表面に水酸基を多く含んだ構造となっている。そのため、指紋や空気中の塵等が付着すると、画像上に陰影が現れる不具合がある。
【０００３】
この様な問題を解決するために、フッ素化炭化水素基及びクロロシリル基を有する化合物を液晶表示画面と反応させ、ポリシロキサン構造を有する防汚被膜を液晶表示画面表面に形成し、防汚性を付与することが提案されている（特開平６−１１００４９号公報）。
【０００４】
しかしながら、クロロシリル基を有するポリシロキサン化合物を反応させると、反応に伴い塩化水素が発生するため、公害の原因となったり、液晶基盤そのものに悪影響を与える可能性がある。また、クロロシリル基は非水系溶媒中では安定性が低い問題がある。
【０００５】
本発明は、塩化水素などの有害なガスが発生せず、非水系溶媒中で安定な処理剤を用いた液晶表示画面の処理方法及び防汚処理された液晶表示画面を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明者は、上記課題に鑑み検討を重ねた結果、特定構造のフッ化シラザン化合物を用いて液晶表示画面を処理することで、安全且つ容易に液晶表示画面の表面に防汚被膜を形成できることを見出した。
【０００７】
本発明は、液晶表示画面を下記一般式（Ｉ）
【０００８】
【化３】
〔式中、ＲｆはＣｍＦ２ｍ＋１−（ＣＨ２）ｐ−｛ｍは、５〜１５の整数を示し、ｐは２又は３を示す。｝を示し、Ｒは炭素原子数１〜１０のフッ素原子を含まない置換又は非置換の１価の炭化水素基を示し、ａは０、１または２である。〕
で表される基を含む分子量５０００以下のシラザン化合物で処理することを特徴とする液晶表示画面の防汚処理方法を提供するものである。
【００１０】
また、本発明は、下記の一般式（ＩＩ）
【００１１】
【化４】
〔式中、ＲｆおよびＲは前記に同じ。ｘは０〜２０の整数を示す。〕
で表される表面構造を有する液晶表示画面を提供するものである。
【００１３】
本発明で用いる一般式（Ｉ）のシラザン化合物は、公知の化合物である。
【００１４】
一般式（Ｉ）及び（ＩＩ）において、Ｒｆは、ＣｍＦ２ｍ＋１−（ＣＨ２）ｐ−で表される。
【００１５】
Ｒｆにおいて、ｍは５〜１５の整数、好ましくは６〜１２の整数を表す。ｐは２又は３である。好ましいＲｆとしては、Ｃ８Ｆ１７ＣＨ２ＣＨ２−、Ｃ６Ｈ１３ＣＨ２ＣＨ２−、Ｃ３Ｆ７Ｃ（ＣＦ３）（ＣＦ３）ＣＨ２ＣＨ２ＣＨ２−が例示できる。ｘは０〜２０の整数であれば、いずれであってもよく、特に限定されない。
Ｒは、炭素数１〜１０の炭化水素基を示し、該炭化水素基としてはメチル基、エチル基、プロピル基などのアルキル基、ビニル基、アリル基などのアルケニル基、１−シクロペンテニル基、１−シクロヘキセニル基などのシクロアルケニル基等の脂肪族又は脂環式の飽和又は不飽和の炭化水素基；フェニル基、トリル基、キシリル基等の芳香族炭化水素基；及びシアノエチル基、メトキシエチル基などの置換炭化水素基が挙げられる。
【００１６】
一般式（Ｉ）で表されるシラザン化合物の分子量は、５０００以下であるのが好ましい。該分子量が５０００以下であれば、立体障害等による反応性の低下もなく、液晶表示画面表面のＯＨ基を十分にシリル化できるため好ましい。
【００１７】
一般式（Ｉ）の化合物で処理される液晶表示画面は、表面にＳｉ−ＯＨ構造を有する限り特に限定されず、公知の液晶表示画面が広く用いられ、例えばガラス基盤そのものや、ガラス基盤上に樹脂フィルムを接着し、さらにＳｉＯ２を蒸着させたものなどが挙げられる。
【００１８】
本発明の液晶表示画面の保護被膜は、単分子膜であるのが好ましい。また、屈折率は保護被膜の形成の前後でほとんど変化しないのが好ましい。
【００１９】
一般式（Ｉ）の化合物を用いて液晶表示画面に防汚性保護膜を形成する方法を以下に例示する。
【００２０】
（１） 一般式（Ｉ）の化合物を非水系溶媒に溶解し、液晶表示画面を浸漬し、引き上げることによって化学結合させた保護膜を形成する方法；
（２） 一般式（Ｉ）の化合物を非水系溶媒に溶解し、液晶表示画面に塗布又はスプレーすることによって化学結合させた保護膜を形成する方法；および
（３） 液晶表示画面に一般式（Ｉ）の化合物を蒸着させることにより、化学結合させた保護膜を形成させる方法。
【００２１】
上記（１）及び（２）の方法における非水系溶媒としては、１，１−ジクロロ−１−フルオロエタン（１４１ｂ）、１，１，２，２−テトラクロロジフルオロエタン（１１２）、１，１，１−トリフルオロジクロロエタン（１２３）等の代替フロン類、トリフルオロエタノール、ヘキサフルオロイソプロパノール等のフッ素化アルコール類、ヘキサフルオロベンゼン、トリフルオロメチルベンゼン，１，３−ビス（トリフルオロメチル）ベンゼン、１，４−ビス（トリフルオロメチル）ベンゼン等のフッ素化芳香族化合物等を使用するのが好ましい。
【００２２】
溶液の濃度としては、０．０００１重量％〜１重量％程度が好ましく、特に０．０００５重量％〜０．１重量％程度が好ましい。濃度が上記の範囲内にあれば、所望の効果が得られ且つ保護膜が単分子膜になるため好ましい。
【００２３】
上記（２）及び（３）の方法を用いると、液晶表示画面の片面だけに保護膜を形成させることができるため好ましい。
【００２４】
【発明の効果】
本発明の方法によれば、塩化水素などの有害なガスが発生せず、安全且つ簡便に液晶表示画面に防汚性の保護膜を形成することができる。
【００２５】
また、本発明の液晶表示画面は、一般式（ＩＩ）のシロキサン構造を有しているため、防汚効果、屈折率、耐久性等に優れている。
【００２６】
【実施例】
以下、本発明を実施例を用いて説明する。
【００２７】
実施例１
フッ素化シラザン（一般式（Ｉ）においてＲｆ−＝C8 F 17CH2CH2−、Ｒ＝CH3、平均分子量３０００）を、１，３−ビス（トリフルオロメチル）ベンゼンに０．１重量％の濃度で溶解して使用液とし、液晶表示画面用ガラスを該溶液に１分間浸漬し、ゆっくり引き上げ、保護膜を形成した。
【００２８】
保護膜を形成させた液晶表示画面用ガラスの水及びオレイン酸の接触角を測定したところ、それぞれ１１０゜および７４゜であった。
【００２９】
また、このガラスに指紋を付着させ、ティッシュペーパーで軽く拭き取ったところ、完全に除去できた。
【００３０】
実施例２
液晶表示画面用ガラスの代わりにアクリル樹脂フィルムの表面にＳｉＯ２を蒸着させたフィルムを用いる以外は、実施例１の方法に従って、水及びオレイン酸の接触角を測定したところ、それぞれ１０７゜および６１゜であった。
【００３１】
また、このガラスに指紋を付着させ、ティッシュペーパーで軽く拭き取ったところ、完全に除去できた。
【００３２】
比較例１
保護膜を形成させていない液晶表示画面用ガラスの水及びオレイン酸の接触角を測定したところ、それぞれ６０゜及び２０゜であった。
【００３３】
また、未処理のガラスに指紋を付着させ、ティッシュペーパーで強く拭き取ってもなかなか除去できなかった。[0001]
[Industrial application fields]
The present invention relates to an antifouling treatment method for a liquid crystal display screen and an antifouling treated liquid crystal display screen.
[0002]
[Prior art]
Conventionally, liquid crystal display screens have been used in various fields such as personal computers, word processors, televisions, and cash corner touch panels. This liquid crystal display screen is generally a glass substrate itself, or a resin film adhered on the glass substrate, and SiO 2 is evaporated, and has a structure containing many hydroxyl groups on the surface. Therefore, when fingerprints or dust in the air adheres, there is a problem that a shadow appears on the image.
[0003]
In order to solve such problems, a compound having a fluorinated hydrocarbon group and a chlorosilyl group is reacted with a liquid crystal display screen to form an antifouling film having a polysiloxane structure on the surface of the liquid crystal display screen. It has been proposed to provide this (Japanese Patent Laid-Open No. 6-110049).
[0004]
However, when a polysiloxane compound having a chlorosilyl group is reacted, hydrogen chloride is generated with the reaction, which may cause pollution or adversely affect the liquid crystal substrate itself. Further, the chlorosilyl group has a problem of low stability in a non-aqueous solvent.
[0005]
An object of the present invention is to provide a liquid crystal display screen processing method using a processing agent that is stable in a non-aqueous solvent and does not generate harmful gases such as hydrogen chloride, and an antifouling liquid crystal display screen. To do.
[0006]
[Means for Solving the Problems]
As a result of repeated investigations in view of the above problems, the present inventor can form an antifouling coating on the surface of a liquid crystal display screen safely and easily by treating the liquid crystal display screen with a silazane fluoride compound having a specific structure. I found.
[0007]
The present invention provides a liquid crystal display screen having the following general formula (I)
[0008]
[Chemical 3]
Wherein, Rf is C m F 2m + 1 - ( CH 2) p - {m represents an integer of 5 to 15, p represents 2 or 3. R represents a substituted or unsubstituted monovalent hydrocarbon group not containing a fluorine atom having 1 to 10 carbon atoms, and a is 0, 1 or 2. ]
And a silazane compound having a molecular weight of 5000 or less containing a group represented by formula (1).
[0010]
The present invention also provides the following general formula (II)
[0011]
[Formula 4]
[Wherein, Rf and R are the same as defined above. x shows the integer of 0-20. ]
The liquid crystal display screen which has the surface structure represented by this is provided.
[0013]
Silazane compounds of general formula (I) used in the present invention are compounds of the publicly known.
[0014]
In the general formula (I) and (II), Rf is, C m F 2m + 1 - (CH 2) p - represented by.
[0015]
In Rf, m represents an integer of 5 to 15, preferably an integer of 6 to 12. p is 2 or 3. Preferred Rf, C 8 F 17 CH 2 CH 2 -, C 6 H 13 CH 2 CH 2 -, C 3 F 7 C (CF 3) (CF 3) CH 2 CH 2 CH 2 - can be exemplified. If x is an integer of 0-20, any may be sufficient and it will not specifically limit.
R represents a hydrocarbon group having 1 to 10 carbon atoms, and examples of the hydrocarbon group include an alkyl group such as a methyl group, an ethyl group, and a propyl group, an alkenyl group such as a vinyl group and an allyl group, a 1-cyclopentenyl group, Aliphatic or alicyclic saturated or unsaturated hydrocarbon groups such as cycloalkenyl groups such as 1-cyclohexenyl group; aromatic hydrocarbon groups such as phenyl group, tolyl group, xylyl group; and cyanoethyl group, methoxyethyl And substituted hydrocarbon groups such as groups.
[0016]
The molecular weight of the silazane compound represented by the general formula (I) is preferably 5000 or less. If the molecular weight is 5000 or less, the reactivity due to steric hindrance or the like is not lowered, and the OH group on the surface of the liquid crystal display screen can be sufficiently silylated.
[0017]
The liquid crystal display screen treated with the compound of general formula (I) is not particularly limited as long as it has a Si—OH structure on the surface, and known liquid crystal display screens are widely used, for example, on the glass substrate itself or on the glass substrate. Examples include those obtained by bonding a resin film and further depositing SiO 2 .
[0018]
The protective film of the liquid crystal display screen of the present invention is preferably a monomolecular film. Moreover, it is preferable that a refractive index hardly changes before and after formation of a protective film.
[0019]
A method for forming an antifouling protective film on a liquid crystal display screen using the compound of the general formula (I) is exemplified below.
[0020]
(1) A method of forming a chemically bonded protective film by dissolving the compound of general formula (I) in a non-aqueous solvent, immersing and lifting the liquid crystal display screen;
(2) A method of forming a protective film chemically bonded by dissolving a compound of general formula (I) in a non-aqueous solvent and applying or spraying on a liquid crystal display screen; and (3) General formula ( A method of forming a chemically bonded protective film by depositing the compound of I).
[0021]
As the non-aqueous solvent in the methods (1) and (2), 1,1-dichloro-1-fluoroethane (141b), 1,1,2,2-tetrachlorodifluoroethane (112), 1,1, Alternative fluorocarbons such as 1-trifluorodichloroethane (123), fluorinated alcohols such as trifluoroethanol and hexafluoroisopropanol, hexafluorobenzene, trifluoromethylbenzene, 1,3-bis (trifluoromethyl) benzene, 1 It is preferable to use a fluorinated aromatic compound such as 1,4-bis (trifluoromethyl) benzene.
[0022]
The concentration of the solution is preferably about 0.0001% to 1% by weight, and more preferably about 0.0005% to 0.1% by weight. A concentration within the above range is preferable because a desired effect can be obtained and the protective film becomes a monomolecular film.
[0023]
It is preferable to use the methods (2) and (3) because a protective film can be formed only on one side of the liquid crystal display screen.
[0024]
【The invention's effect】
According to the method of the present invention, no harmful gas such as hydrogen chloride is generated, and an antifouling protective film can be formed on a liquid crystal display screen safely and easily.
[0025]
Moreover, since the liquid crystal display screen of the present invention has a siloxane structure of the general formula (II), it is excellent in antifouling effect, refractive index, durability and the like.
[0026]
【Example】
Hereinafter, the present invention will be described using examples.
[0027]
Example 1
0.1 weight of fluorinated silazane (Rf—═C 8 F 17 CH 2 CH 2 —, R═CH 3 , average molecular weight 3000 in general formula (I)) in 1,3-bis (trifluoromethyl) benzene % Was used as a working solution, and the glass for a liquid crystal display screen was immersed in the solution for 1 minute and slowly pulled up to form a protective film.
[0028]
When the contact angles of water and oleic acid on the glass for a liquid crystal display screen on which the protective film was formed were measured, they were 110 ° and 74 °, respectively.
[0029]
In addition, fingerprints were attached to the glass and lightly wiped off with tissue paper, it was completely removed.
[0030]
Example 2
The contact angles of water and oleic acid were measured according to the method of Example 1 except that a film obtained by vapor-depositing SiO 2 on the surface of an acrylic resin film was used in place of the liquid crystal display screen glass.゜.
[0031]
In addition, fingerprints were attached to the glass and lightly wiped off with tissue paper, it was completely removed.
[0032]
Comparative Example 1
When the contact angles of water and oleic acid of the glass for a liquid crystal display screen on which no protective film was formed were measured, they were 60 ° and 20 °, respectively.
[0033]
Moreover, even if fingerprints were attached to untreated glass and wiped off with tissue paper, it was difficult to remove.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01464695A JP3613639B2 (en) | 1995-01-31 | 1995-01-31 | Antifouling treatment method for liquid crystal display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01464695A JP3613639B2 (en) | 1995-01-31 | 1995-01-31 | Antifouling treatment method for liquid crystal display screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08201746A JPH08201746A (en) | 1996-08-09 |
| JP3613639B2 true JP3613639B2 (en) | 2005-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01464695A Expired - Fee Related JP3613639B2 (en) | 1995-01-31 | 1995-01-31 | Antifouling treatment method for liquid crystal display screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3613639B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2011152404A1 (en) | 2010-06-01 | 2013-08-01 | リケンテクノス株式会社 | Paint and adhesive composition, adhesion method and laminate |
-
1995
- 1995-01-31 JP JP01464695A patent/JP3613639B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JPH08201746A (en) | 1996-08-09 |
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