JP2002356631A - Aqueous erasable ink - Google Patents
Aqueous erasable inkInfo
- Publication number
- JP2002356631A JP2002356631A JP2001163562A JP2001163562A JP2002356631A JP 2002356631 A JP2002356631 A JP 2002356631A JP 2001163562 A JP2001163562 A JP 2001163562A JP 2001163562 A JP2001163562 A JP 2001163562A JP 2002356631 A JP2002356631 A JP 2002356631A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- weight
- water
- phthalein
- propylene glycol
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、マーキングペンや
ボールペンなどで筆記した筆跡が時間の経過と共に消色
する筆記具用の水性インキに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based ink for a writing instrument in which handwriting written with a marking pen, a ball-point pen or the like is erased with the passage of time.
【０００２】[0002]
【従来の技術】従来より、水素イオン濃度の状態によっ
て発色・消色を繰り返す酸塩基指示薬としてフタレイン
系指示薬が知られており、この性質を利用して、筆記し
た筆跡が時間の経過と共に消色する水性インキが知られ
ている。このような消色性インキとしては、特開昭５３
−１４５７３６号、特開昭５４−１３１４２８号、特開
昭５４−１５４６３１号、特開昭５７−１４５１６９
号、等が公知となっている。2. Description of the Related Art A phthalein-based indicator has been conventionally known as an acid-base indicator that repeats color development and decoloration depending on the state of hydrogen ion concentration. Water-based inks are known. Such a decolorizable ink is disclosed in
145736, JP-A-54-131428, JP-A-54-154631, and JP-A-57-145169.
No. are known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、フタレ
イン系指示薬は水や溶剤に難溶であるので、従来の発明
は、時間の経過と共にフタレイン系指示薬が析出したり
して、インキの安定性に問題があった。そこで、本発明
は経時的に安定度の高い消色性水性インキを提供するも
のである。However, since the phthalein-based indicator is hardly soluble in water or a solvent, the conventional invention has a problem in that the phthalein-based indicator precipitates with the passage of time and the stability of the ink becomes poor. was there. Accordingly, the present invention provides a decolorizable aqueous ink having high stability over time.
【０００４】[0004]
【課題を解決するための手段】水、保湿剤、フタレイン
系指示薬、プロピレングリコールモノアルキルエーテ
ル、ｐＨ調整剤を含有してなる消色性水性インキ。A decolorizable water-based ink containing water, a humectant, a phthalein-based indicator, propylene glycol monoalkyl ether, and a pH adjuster.
【０００５】以下、本発明を詳細に説明する。本発明の
消色性水性インキは、水、保湿剤、フタレイン系指示
薬、プロピレングリコールモノアルキルエーテル、ｐＨ
調整剤をを少なくとも必須構成要素とする。Hereinafter, the present invention will be described in detail. The decolorizable aqueous ink of the present invention comprises water, a humectant, a phthalein-based indicator, a propylene glycol monoalkyl ether,
A regulator is at least an essential component.
【０００６】水は、水道水でもよいが蒸留水が最も好ま
しい。また、水はインキ全量に対して１０〜８０重量％
程度、好ましくはインキ全量に対して３０〜５０重量％
程度が用いられる。The water may be tap water, but distilled water is most preferred. Water is 10 to 80% by weight based on the total weight of the ink.
Degree, preferably 30 to 50% by weight based on the total amount of the ink
Degree is used.
【０００７】保湿剤は、グリセリン、エチレングリコー
ル、ジエチレングリコール、プロピレングリコール、ジ
プロピレングリコール、ジエタノールアミン、トリエタ
ノールアミン、メチルセロソルブ、エチルセロソルブ等
が用いられる。また、保湿剤はインキ全量に対して１０
〜９０重量％程度、好ましくはインキ全量に対して３０
〜７０重量％程度が用いられる。As the humectant, glycerin, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, diethanolamine, triethanolamine, methyl cellosolve, ethyl cellosolve and the like are used. In addition, the humectant is used in an amount of 10
About 90% by weight, preferably 30 to the total amount of the ink.
About 70% by weight is used.
【０００８】フタレイン系指示薬は、α−ナフトールフ
タレイン、ｐ−クレゾールフタレイン、ｏ−クレゾール
フタレイン、ｍ−クレゾールフタレイン、フェノールフ
タレイン、チモールフタレイン、キシレノールフタレイ
ン、ジブロモフェノールテトラブロモフェニルスルホン
フタレイン、ニトロフェノールスルホンフタレイン等が
用いられる。これらのフタレイン系指示薬は、ｐＨが塩
基性側で発色し、酸性側で消色するものである。また、
フタレイン系指示薬はインキ全量に対して０．１〜２０
重量％程度、好ましくはインキ全量に対して０．５〜１
０重量％程度が用いられる。The phthalein-based indicators include α-naphtholphthalein, p-cresolphthalein, o-cresolphthalein, m-cresolphthalein, phenolphthalein, thymolphthalein, xylenolphthalein, dibromophenoltetrabromophenylsulfone Phthalein, nitrophenolsulfonephthalein and the like are used. These phthalein-based indicators develop color on a basic pH side and decolor on an acidic side. Also,
The phthalein-based indicator is 0.1 to 20 based on the total amount of the ink.
% By weight, preferably 0.5 to 1% based on the total amount of the ink.
About 0% by weight is used.
【０００９】プロピレングリコールモノアルキルエーテ
ルは、１，２−プロピレングリコールモノメチルエーテ
ル、１，２−プロピレングリコールモノエチルエーテ
ル、１，２−プロピレングリコールモノプロピレンエー
テル、１，３−プロピレングリコールモノメチルエーテ
ル、１，３−プロピレングリコールモノエチルエーテ
ル、１，３−プロピレングリコールモノプロピレンエー
テル等が用いられる。当該プロピレングリコールモノア
ルキルエーテルは、前記フタレイン系指示薬の溶解助剤
として機能し、前記水や保湿剤に対しての溶解性を飛躍
的に高めることができる。また、フタレイン系指示薬は
インキ全量に対して０．１〜２０重量％程度、好ましく
はインキ全量に対して０．５〜１０重量％程度が用いら
れる。Propylene glycol monoalkyl ether includes 1,2-propylene glycol monomethyl ether, 1,2-propylene glycol monoethyl ether, 1,2-propylene glycol monopropylene ether, 1,3-propylene glycol monomethyl ether, For example, 3-propylene glycol monoethyl ether, 1,3-propylene glycol monopropylene ether and the like are used. The propylene glycol monoalkyl ether functions as a dissolution aid for the phthalein-based indicator, and can dramatically improve the solubility in the water and the humectant. The phthalein-based indicator is used in an amount of about 0.1 to 20% by weight, preferably about 0.5 to 10% by weight, based on the total amount of the ink.
【００１０】ｐＨ調整剤は、炭酸ナトリウム、炭酸カリ
ウム、ジエタノールアミン、トリエタノールアミン、ア
ンモニア水等が用いられる。低級アルカノールアミンは
酸性ガスの吸収剤としても作用し、また、アンモニア水
はアンモニアガスを発生して酸性ガスを中和する作用も
ある。前記ｐＨ調整剤はインキ全量に対して０．１〜４
０重量％程度、好ましくはインキ全量に対して０．５〜
３０重量％程度が用いられる。As the pH adjuster, sodium carbonate, potassium carbonate, diethanolamine, triethanolamine, aqueous ammonia and the like are used. The lower alkanolamine also acts as an acid gas absorbent, and the ammonia water also has a function of generating ammonia gas and neutralizing the acid gas. The pH adjuster is 0.1 to 4 with respect to the total amount of the ink.
About 0% by weight, preferably 0.5 to
About 30% by weight is used.
【００１１】本発明には必要に応じて、１，２−ベンズ
イソチアゾリン−３−オン、１，２−ベンズイソチアゾ
リン−３−オンナトリウム塩、１，２−ベンズイソチア
ゾリン−３−オンアルキルアミン、２−メトキシカルボ
ニルアミノベンズイミダゾール−４‘−Ｎ−ドデシルベ
ンゾールスルフォン酸塩といった防腐剤防かび剤や、紫
外線吸収剤、染料や顔料といった補色剤等の添加剤を適
量配合していてもよい。In the present invention, 1,2-benzisothiazolin-3-one, 1,2-benzisothiazolin-3-one sodium salt, 1,2-benzisothiazolin-3-onealkylamine, An appropriate amount of additives such as preservatives and fungicides such as -methoxycarbonylaminobenzimidazole-4'-N-dodecylbenzoylsulfonate, and complementary colors such as ultraviolet absorbers and dyes and pigments may be added.
【００１２】上記の要素を混合すると本発明の水性イン
キが得られる。当該水性インキは、ｐＨ９〜１２程度が
好ましい。When the above-mentioned components are mixed, the water-based ink of the present invention is obtained. The pH of the aqueous ink is preferably about 9 to 12.
【００１３】次に、本発明の使用方法について説明す
る。本発明の消色性インキは、アルカリ性に保たれてい
るので、フタレイン指示薬が発色した状態になってい
る。これを吸収体式マーキングペンや生インキ直液式ボ
ールペンに詰め、上質紙やダンボールに筆記する。一定
期間放置しておくと、配合されたアルカリ性の成分が揮
発して失われたり、ｐＨが低下して中性に近づくことに
より色素の化学構造が変化してついには消色する。Next, a method of using the present invention will be described. Since the decolorizable ink of the present invention is kept alkaline, the phthalein indicator is in a colored state. This is filled into an absorbent marking pen or a fresh ink direct liquid ball-point pen and written on high-quality paper or cardboard. If left for a certain period of time, the compounded alkaline components are volatilized and lost, or the pH decreases to near neutrality, and the chemical structure of the dye is changed and eventually the color is erased.
【００１４】[0014]
【実施例】以下、本発明を実施例により説明するが、本
発明はこれらの実施例に限定されるものではない。 （実験例１） 水 ５５．０重量％ グリセリン ３０．０重量％ ｏ−クレゾールフタレイン ２．０重量％ １，２−プロピレングリコールモノメチルエーテル １０．０重量％ 炭酸ナトリウム ２．０重量％ １，２−ベンズイソチアゾリン−３−オン １．０重量％ 上記物質を撹拌して消色性インキ組成物を作成した。こ
のインキの色は鮮明でやや赤味の紫色を呈したが、これ
をマーキングペン用のポリエステル繊維からなるインキ
吸収体に含浸させ、マーキングペン本体に内蔵した。当
該マーキングペンは、６ヶ月間暗所に保管してあって
も、ｏ−クレゾールフタレインが析出することはなかっ
た。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. (Experimental Example 1) Water 55.0% by weight Glycerin 30.0% by weight o-Cresolphthalein 2.0% by weight 1,2-propylene glycol monomethyl ether 10.0% by weight Sodium carbonate 2.0% by weight 1,2 -Benzisothiazolin-3-one 1.0% by weight The above substance was stirred to prepare a decolorizable ink composition. The color of this ink was clear and slightly reddish purple, but this ink was impregnated with an ink absorber made of polyester fiber for a marking pen and built into the marking pen body. Even if the marking pen was stored in a dark place for 6 months, o-cresolphthalein did not precipitate.
【００１５】 （実験例２） 水 ５２．０重量％ グリセリン ３０．０重量％ ｏ−クレゾールフタレイン ２．０重量％ １，３−プロピレングリコールモノメチルエーテル １０．０重量％ トリエタノールアミン ５．０重量％ １，２−ベンズイソチアゾリン−３−オンナトリウム塩 １．０重量％ 上記物質を撹拌して消色性インキ組成物を作成した。こ
のインキの色は鮮明でやや赤味の紫色を呈したが、これ
をインキ調節体を有する直液式ボールペンに内蔵させ
た。当該ボールペンは、６ヶ月間暗所に保管してあって
も、ｏ−クレゾールフタレインが析出することはなかっ
た。Experimental Example 2 Water 52.0% by weight Glycerin 30.0% by weight o-Cresolphthalein 2.0% by weight 1,3-propylene glycol monomethyl ether 10.0% by weight Triethanolamine 5.0% by weight % 1,2-benzisothiazolin-3-one sodium salt 1.0% by weight The above substance was stirred to prepare a decolorizable ink composition. The color of this ink was clear and slightly reddish purple, and this was incorporated in a direct liquid ball-point pen having an ink regulator. Even when the ballpoint pen was stored in a dark place for 6 months, o-cresolphthalein did not precipitate.
【００１６】[0016]
【発明の効果】以上の通り本発明は、フタレイン系指示
薬の溶解性を高めることができ、これにより消色性イン
キの安定化を高めることができた。よって、紙や布、ダ
ンボールなどに筆記した場合でもその筆跡を一定時間実
用的な濃度で残すことができ、長期間保管しておいても
フタレイン系指示薬が析出することがない筆記具を得る
ことができる。As described above, according to the present invention, the solubility of the phthalein-based indicator can be increased, and the stabilization of the decolorizable ink can be enhanced. Therefore, even when writing on paper, cloth, cardboard, etc., the handwriting can be left at a practical concentration for a certain period of time, and it is possible to obtain a writing instrument in which the phthalein-based indicator does not precipitate even after long-term storage. it can.
Claims (1)
ピレングリコールモノアルキルエーテル、ｐＨ調整剤を
含有してなる消色性水性インキ。1. A decolorizable aqueous ink containing water, a humectant, a phthalein-based indicator, a propylene glycol monoalkyl ether, and a pH adjuster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001163562A JP4754719B2 (en) | 2001-05-31 | 2001-05-31 | Decolorizable water-based ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001163562A JP4754719B2 (en) | 2001-05-31 | 2001-05-31 | Decolorizable water-based ink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002356631A true JP2002356631A (en) | 2002-12-13 |
| JP4754719B2 JP4754719B2 (en) | 2011-08-24 |
Family
ID=19006508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001163562A Expired - Fee Related JP4754719B2 (en) | 2001-05-31 | 2001-05-31 | Decolorizable water-based ink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4754719B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007040934A (en) * | 2005-08-05 | 2007-02-15 | Riken Keiki Co Ltd | Agent for detecting organic-phosphorus-based nerve gas |
| JP2007154062A (en) * | 2005-12-06 | 2007-06-21 | Pilot Corporation | Ink composition for aqueous ball-point pen, capable of changing or erasing color |
| JP2008510842A (en) * | 2004-08-19 | 2008-04-10 | サンフォード エル．ピー． | Decryption system |
| JP2008253975A (en) * | 2007-03-09 | 2008-10-23 | Toto Ltd | Coating method, composite material produced by method, and coating material used for method |
| KR100933546B1 (en) * | 2007-10-10 | 2009-12-23 | 마이크롭틱스 주식회사 | Imaging lens |
| WO2013007135A1 (en) * | 2011-07-14 | 2013-01-17 | 宁波绿拓新材料有限公司 | Easily erasable hydrolytic fading ink and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53145736A (en) * | 1977-05-24 | 1978-12-19 | Pentel Kk | Erasable ink for writing instrument |
| JPS5462019A (en) * | 1977-10-24 | 1979-05-18 | Pentel Kk | Ink for writing board |
| JPS54131428A (en) * | 1978-04-03 | 1979-10-12 | Adger Kogyo Co Ltd | Ink |
| JPS63286481A (en) * | 1987-05-20 | 1988-11-24 | Dainichi Color & Chem Mfg Co Ltd | Ink composition for ink jetting |
| JPH05215743A (en) * | 1992-02-03 | 1993-08-24 | Neos Co Ltd | Method for forming coating layer including ph indicator |
| JPH06287497A (en) * | 1993-04-02 | 1994-10-11 | Pilot Ink Co Ltd | Color-dying marking pen ink |
-
2001
- 2001-05-31 JP JP2001163562A patent/JP4754719B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53145736A (en) * | 1977-05-24 | 1978-12-19 | Pentel Kk | Erasable ink for writing instrument |
| JPS5462019A (en) * | 1977-10-24 | 1979-05-18 | Pentel Kk | Ink for writing board |
| JPS54131428A (en) * | 1978-04-03 | 1979-10-12 | Adger Kogyo Co Ltd | Ink |
| JPS63286481A (en) * | 1987-05-20 | 1988-11-24 | Dainichi Color & Chem Mfg Co Ltd | Ink composition for ink jetting |
| JPH05215743A (en) * | 1992-02-03 | 1993-08-24 | Neos Co Ltd | Method for forming coating layer including ph indicator |
| JPH06287497A (en) * | 1993-04-02 | 1994-10-11 | Pilot Ink Co Ltd | Color-dying marking pen ink |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008510842A (en) * | 2004-08-19 | 2008-04-10 | サンフォード エル．ピー． | Decryption system |
| JP2007040934A (en) * | 2005-08-05 | 2007-02-15 | Riken Keiki Co Ltd | Agent for detecting organic-phosphorus-based nerve gas |
| JP2007154062A (en) * | 2005-12-06 | 2007-06-21 | Pilot Corporation | Ink composition for aqueous ball-point pen, capable of changing or erasing color |
| JP2008253975A (en) * | 2007-03-09 | 2008-10-23 | Toto Ltd | Coating method, composite material produced by method, and coating material used for method |
| JP2010094677A (en) * | 2007-03-09 | 2010-04-30 | Toto Ltd | Coating method, composite material produced by the method, and coating material used for the method |
| JP4518567B2 (en) * | 2007-03-09 | 2010-08-04 | Ｔｏｔｏ株式会社 | Coating liquid |
| KR100933546B1 (en) * | 2007-10-10 | 2009-12-23 | 마이크롭틱스 주식회사 | Imaging lens |
| WO2013007135A1 (en) * | 2011-07-14 | 2013-01-17 | 宁波绿拓新材料有限公司 | Easily erasable hydrolytic fading ink and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4754719B2 (en) | 2011-08-24 |
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