JPH0790213A - Ink - Google Patents

Abstract

PURPOSE:To obtain an ink capable of instantly decoloring color of ink by adhesion of water, readily and cleanly carrying out eliminating and correcting operation of letter, etc., reproducing eliminated letter, etc. CONSTITUTION:This ink is obtained by blending an electron donative coloring compound selected from Crystal Violet lactone, Malachite Green lactone, 1,3- dimethyl-6-diethylaminofluoran, 6-diethylaminobenzo[alpha]-fluoran, 3- cyclohexylmethylamino-6-methyl-7-anilinofluoran, benzoyl Leucomethylene Blue, methoxybenzoyl Leucomethylene Blue, 2-(phenyliminoethanediylidene)-3,3- trimethyl-indoline, 1,3,3-trimethyl-indolino-7'-chloro-beta-naphthospiropyran, di beta- naphthospiropyran, N-acetyl Auramine, N-phenyl Auramine and Rhodamine with an electron attractive developing compound selected from zinc salicylate and bisphenol A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a handwritten and printed picture.
The present invention relates to an ink capable of instantly erasing characters and the like by adhering water, erasing and correcting characters and the like easily and cleanly, and also capable of reproducing erased characters and the like.

[0002]

2. Description of the Related Art Conventionally, fountain pens, ballpoint pens, water-based / oil-based felt pens, etc. have been widely known as writing instruments using ink. For erasing and correcting writing traces of pictures, letters, etc. written by these. For example, in the case of a fountain pen, it has been necessary to use an ink erasing liquid or the like that utilizes a bleaching action. In the case of a felt pen, etc., when writing on a non-permeable surface such as glass or plastic, it can be erased by wiping with a paper or cloth containing a solvent that dissolves ink, When writing on a permeable surface such as a cloth, the ink penetrates into the surface, making it difficult to erase even with the use of a solvent. Therefore, in such a case or when using a ballpoint pen, etc., the writing mark is hidden from above. For example, it is necessary to use white correction fluid or white correction tape.

[0003]

As described above, in the ink used for the conventional writing instruments and the ink used for printing, a dedicated member containing a solvent or the like must be used for erasing and correcting the ink. However, in recent years, the advent of inks that can be easily erased, corrected, etc. has been strongly desired.

Therefore, in view of such a situation, the inventor of the present invention has conducted extensive research on various dyes, pigments and the like. As a result, among the electron-donating color-forming compounds known as dyes, some compounds react with a specific color-developing compound that is zinc salicylate or bisphenol A to develop color from colorless to colored, while adhering to water. It has been discovered that the loss of the effect of the color-developing compound returns the colored state to a colorless state, and this colorless / colored change can be repeated. Then, by using the colored ink agent in which the specific color-forming compound and the color-developing compound are mixed, it has been found that a new ink capable of satisfying the conventional requirements appears.

That is, the present invention is based on the use of a colored ink agent which is a combination of a specific color-developing compound and a color-developing compound, and is capable of conveniently and cleanly erasing and correcting writing marks and the like. It is an object of the present invention to provide an ink which can solve the above problems.

[0006]

In order to achieve the above object, the ink of the present invention comprises crystal violet lactone; malachite green lactone; 1.3 dimethyl-6.
-Diethylaminofluorane; 6-diethylamino-benzo [α] -fluorane; 3-cyclohexylmethylamino-6-methyl-7-anilinofluorane; benzoylleucomethylene blue; ethylleucomethylene blue; methoxybenzoylleucomethylene blue; 2-
(Phenyliminoethanedilidene) -3.3-trimethyl-indoline; 1.3.3-trimethyl-indolino-7'-chloro-β-naphthospiropyran;di-β-naphthospiropyran;N-acetylauramine; N -Phenyl auramine; Rhodamine B lactam; one or more electron-donating color compounds selected from the group A, and an electron-accepting color developing compound selected from the group B consisting of zinc salicylate and bisphenol A. It contains mixed colored ink agents.

[0007]

The electron-donating color-forming compound selected from the group A is brought into molecular contact with an electron-accepting color-developing compound consisting of zinc salicylate and bisphenol A,
It develops from a colorless color to a color peculiar to each coloring compound. Therefore, a color ink can be formed by mixing these. The ink loses the effect of the color developing compound due to the adhesion of water and can change from a colored state to a colorless state. That is, the ink is erased only by the adhesion of water, and the handwriting and the like can be erased. Also, since the effect of the color developing compound is lost by water, the decolored state is maintained on the paper surface even after drying,
Therefore, it becomes possible to newly write on the decolored portion with the ink, and the correction and correction work of characters and the like can be conveniently performed.

Further, since this ink causes the ink agent itself to be erased by water, it is possible to erase and correct the handwriting even when writing on the permeable surface, depending on the material of the writing object. You can write and modify without writing. Also clothes,
It is possible to easily erase and clean letters on walls, furniture, etc., adhesion due to erroneous operation, and stains. Note that the handwriting in the decolored state can be recolored, for example, by applying the above-mentioned color developing compound, and thus the decolorization can be used to record and keep important secrets in a colorless state on the paper. It can also be used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, the ink 1 is used as a writing instrument 3 by being contained in a container body 2.

The container body 2 has a pen-shaped cylindrical body 6 whose rear end is sealed by a bottom lid 5, a pen tip fitting 7 fitted to the front end thereof, and a cap which covers the pen tip fitting 7. Piece 9
And with.

A cotton-like impregnated body 10 impregnated with the liquid ink 1 is housed in the body 6 while being covered with a middle cylinder 11.

The nib 7 is composed of a nib core 10 for taking out the ink 1 and a nib holding piece 11 for holding the nib, and the nib holding piece 11 has an opening at the front end of the body portion 6. A partition wall 11A, a flange 11B extending rearward from the periphery of the partition wall and fitted to the body portion 6, and the partition wall 11A.
The holding member 11C is formed integrally with the holding member 11C, which has a cone shape extending from the front side to hold the core 10 with its tip protruding. The core material 10 is, for example, a felt material in which filaments are bundled, and its rear end penetrates the partition wall 11A and communicates with the impregnated body 10, sucks out the ink 1 due to a capillary phenomenon or the like and ink from the pen tip portion 10A at the front end. 1 can be taken out and written.

The ink 1 is a low-viscosity liquid obtained by mixing a colored ink agent comprising an electron-donating color developing compound and an electron-accepting color developing compound in an anhydrous solvent such as ethanol or alcohol. Eggplant

The electron donative color-forming compound is
Crystal violet lactone; malachite green lactone; 1.3 dimethyl-6-diethylaminofluorane; 6-diethylamino-benzo [α] -fluorane; 3-cyclohexylmethylamino-6-methyl-7
-Anilinofluorane; benzoylleucomethylene blue; ethylleucomethylene blue; methoxybenzoylleucomethylene blue; 2- (phenyliminoethanedilidene) -3.3-trimethyl-indoline; 1.3.
3-trimethyl-indolino-7'-chloro-β-naphthospiropyran;di-β-naphthospiropyran; N-acetyl auramine; N-phenyl auramine; rhodamine B lactam;
As the colored ink agent 3, one or more kinds selected from the group A are used.

As the electron-accepting color developing compound, a compound selected from zinc salicylate and bisphenol A group B is used.

The mixture of the electron-donating color-developing compound of group A and the electron-accepting color-developing compound of group B develops a color unique to each color-developing compound by mutual molecular contact. Also, when water is attached to this mixture, it functions as if the water loses the color-developing compound, instantly changing the color development to colorless and maintaining a colorless (decolored) state even after drying the water. To be done. Therefore, the ink 1 can be newly written on the decolorized mark. Further, since the color erasing is performed by a function such that the color developing compound in the ink 1 is lost, by applying a new dry color developing liquid containing the color developing compound after drying, the handwriting before the color erasing is performed. Is reproduced in color.

As described above, since the ink 1 can be erased by adhering water, saliva, etc., it is extremely easy to erase and correct the handwriting, and at the same time, it can be written on clothes, walls, etc.
Adhesive stains caused by erroneous operation can be easily cleaned and handled conveniently. In addition, since the liquid completely dissolves in the solvent, the wicking by the core material 10 is smooth, and the writing can be performed without unevenness and blurring.

Further, the ink 1 can erase these colors even when written on the permeable surface, and thus can be used for various materials such as paper, cloth, wood, leather and plastic.

Since this ink 1 is liquid, it can be used as an ink for writing instruments such as felt pens, fountain pens, ballpoint pens, etc., and can be used in a wide variety of fields such as printing inks and dye inks for clothing. .

(Specific example) 3-cyclohexylmethylamino-6-methyl-7-anilinefluorane 5 parts by weight,
6-diethylamino-benzo [α] -fluorane 2.5
Parts by weight, crystal violet lactone 2.5 parts by weight, and bisphenol A 5 parts by weight are mixed in 60 parts by weight of dimethyl phthalate and 25 parts by weight of ethanol, and stirred for about 20 minutes by a stirrer to give a black color. I got the ink. Also, when water adheres to the characters written with this ink, the color is quickly erased, and (writing)-(erasing with water)-(drying)-
It was confirmed that the (writing) cycle could be repeated.

An anhydrous developer was obtained by stirring 3 parts by weight of zinc salicylate in 68 parts by weight of dimethyl phthalate and 29 parts by weight of ethanol for about 20 minutes. When this was applied to the writing marks of the ink that was decolorized with water, it immediately returned to black, and the writing marks (erasing with water)
It was confirmed that the cycle of- (drying)-(color reappearance due to the developer) can be repeated. When forming as a printing ink, a styrene resin or an acrylic resin may be added as a binder as required.

[0022]

Since the ink of the present invention is constructed as described above, it can be erased by the adhesion of water, the correction work of characters and the like can be easily and cleanly performed, and the erased characters and the like can be regenerated. It is also possible to broaden the range of use.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

Claims (1)

[Claims] 1. Crystal violet lactone; malachite green lactone; 1.3 dimethyl-6-diethylaminofluorane; 6-diethylamino-benzo [α]
-Fluoran; 3-cyclohexylmethylamino-6-
Methyl-7-anilinofluorane; benzoyl leuco methylene blue; ethyl leucomethylene blue; methoxybenzoyl leuco methylene blue; 2- (phenyliminoethanedilidene) -3.3-trimethyl-indoline; 1.3.3-trimethyl-indolino- One or more electron-donating colors selected from the group A consisting of 7'-chloro-β-naphthospiropyran;di-β-naphthospiropyran; N-acetyl auramine; N-phenyl auramine; rhodamine B lactam; An ink comprising a colored ink agent in which a compound and an electron-accepting color developing compound selected from the group B consisting of zinc salicylate and bisphenol A are mixed.