JPS5832675A - Ink - Google Patents

Abstract

PURPOSE:An ink, consisting of a vehicle containing a resin soluble in a polar solvent other than water dissolved therein, a dye soluble in the vehicle and water to be colorless under acidic conditions, etc., and easily erasable with an erasing solution prepared by dissolving an acid in a mixed solvent of water with another polar solvent with certainty. CONSTITUTION:An ink consisting of a vehicle containing a resin, (e.g. ketonic resin or rosin-modified phenolic resin), soluble in a polar solvent, (e.g. methanol or ethylene glycol monomethyl ether), other than water in the solvent and a coloring component, e.g. a dye, (e.g. triphenylmethane dye), or acid-base indicator, (e.g. phthalein), soluble in the vehicle and water to be colorless under acidic conditions, and erasable with an erasing solution containing an acid, (e.g. citric acid), dissolved in a mixed solvent of water with another polar solvent into a colorless state. EFFECT:Capable of being written even on a nonabsorbing surface, and repeatedly written just after the erasing. No substance toxic to the human body is used therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention Ij1a is an ink that is paired with an ink erasing liquid consisting of certain components, and that is composed of components corresponding to the components of the ink erasing liquid, and the ink erasing liquid that forms the pair, The present invention relates to an ink whose handwriting can be easily and reliably erased. And, the features of the present invention are 1. Although the dye or acid-base indicator that is the coloring component of the ink is water-soluble, the color developing property is water-soluble, whereas the solvent of the ink erasing liquid contains water. That is, Although the ink is an anhydrous ink, the coloring components such as dyes are water-soluble. Conventionally, water-based inks used for fountain pens, water-based ballpoint pens, water-based marking pens, etc., are water-based solvents. It is made by completely dissolving water-soluble coloring components in it, and is used exclusively for writing on absorbent surfaces such as paper, but it has been difficult to write on non-absorbent surfaces such as silk film. The erasing of handwriting with the ink is done by a general-purpose or water-based ink eraser paired with the ink, but since the coloring component is water-soluble, general VC still uses water as the main solvent. Therefore, when actually erasing the handwriting, a water-based ink eraser is brought into contact with the handwriting, and at the same time the coloring component is dissolved in the water, the color is bleached by the decolorizing component, but after that, the handwriting is removed one by one with a cloth, etc. If you have to wipe it off, there is a risk of deterioration or damage to the erased area, and it can be troublesome. There are cases where it is difficult to write on the ink, and in such cases, it is necessary to add all the neutralizing ingredients to the ink ingredients in advance so that the above-mentioned repeated writing is possible.

On the other hand, oil-based ink used in oil-based ballpoint pens, oil-based marking pens, etc. can be written on both absorbent and non-absorbent surfaces, but the handwriting made with the oil-based ink is water resistant.
Because it is a special feature, coloring ingredients such as dyes are water-insoluble. Therefore, to erase handwriting, you need to use a single solvent or mixed solvent such as acetone, benzene, methyl ethyl ketone, etc. The coloring components had to be dissolved and dispersed using a mixed solvent containing some surfactant and then wiped off, making erasing incomplete and troublesome. There is also an ink eraser for oil-based ink in which a decolorizing component for the water-insoluble coloring component is added to the single solvent or a mixed solvent; Most of the substances that exist and can have a decolorizing effect are harmful to the human body.

For this reason, the ink eraser is not often used, and as described above, erasing handwriting with oil-based ink that can be written on both absorbent and non-absorbent surfaces is incomplete and troublesome.

The present invention has been developed in view of the above circumstances, and is an ink containing a water-soluble □ coloring component that can be written on not only absorption surfaces but also non-absorption surfaces. The purpose is to provide an ink that can be easily and reliably erased and that can be repeatedly written on immediately after erasing.

The ink of the present invention will be described in detail below. The ink of the present invention includes a color vehicle formed by dissolving a resin soluble in a polar solvent excluding water, and a color vehicle and a water-soluble resin. It consists of a coloring component such as a dye or an acid-base indicator that becomes colorless. That is, it is an ink in which a coloring component such as the dye, which is water-soluble and also soluble in a polar solvent other than water, and which becomes colorless when acidic, is dissolved in a polar solvent other than water. Therefore i#
The ink is an anhydrous ink that has a watery coloring component but does not contain water as a coloring agent, so unlike general water-based inks, it is possible to write on not only absorbing surfaces but also non-absorbing surfaces. A surfactant may be added to the ink in order to improve the solubility of coloring components and resins, improve the stability of the ink over time, and further improve the wettability on non-absorbing surfaces. The ink according to the present invention is compatible with an ink erasing liquid formed by dissolving an acid, which is a coloring component of the ink and a decoloring component for K, in a mixed solvent consisting of water and a polar solvent other than water. It is erased colorlessly by an ink erasing liquid. As mentioned above, the coloring components of the ink≠! Since it is soluble in water and also soluble in polar solvents other than water, the ink eraser II can be used in both water and polar solvents other than water. , II traces are solved, and it can be made into a dispersing friend's master assai.

Therefore, after erasing the ink handwriting according to the present invention, the ink erasing liquid evaporates immediately, and there is no need to wipe it off like with general water-based ink erasers, and repeated writing can be done immediately. The water, which forms part of the main solvent, also has the role of controlling the volatilization rate of the erasing liquid, and the wettability of the water makes it easier for the erasing liquid to come into contact with the handwriting on the non-absorbing surface. Furthermore, unlike oil-based ink erasers, the decolorizing component does not decolorize water-insoluble coloring components, but can be used as long as it can decolorize water-soluble coloring components, so it should not be used as a substance that is harmful to the human body, as mentioned above. That's enough.

In addition, I'ri and I'ri' erasing liquid 0:0 formation kidney - one bottle is 4 good, put it in a separate container -lI! It is also possible to form a pair by K.

Examples of the polar solvent of the ink according to the present invention include methanol,
Ethanol, n, 70-nonyl, isopropanol,
n-butanol, isobutanol, sec-butanol, tertiary-butanol alcohol, acetone, ME-,
Ketones such as methyl isobutyl ketone, ethylene ylicol monomethyl ether 1, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether,
7, x-f, v, n! ? There are volatile polar solvents such as methyl ether, diethylene glycol monoethyl ether, etc. Since water is removed, the drying speed of the gong mark is fast and the adhesion to the gong mark surface is also improved.As the resin to be dissolved in the polar solvent, rosin, ester gum, ketone resin, and phenol resin can be used. These resins can be used alone or in combination.The addition of this resin further improves the adhesion of handwriting, making it especially possible to write on non-absorbent surfaces.

Next, as dyes that are coloring components of the ink, use quinanthene dyes such as Acid Bio 6B, Brilliant Blue FCFII, triphenylmethane dyes, eosin, phloxine, acid red, erythrosine, rose bengal, and quinoline yellow. . Other acid-base indicators that are coloring components include phthalein-based, penzein-based, sulfonephthalein-based, azo-based, triphenylmethane-based, and nitro-based indicators; specifically, quinaldine'
y)'', *-dinitrophenol, -dinitrophenol, γ-dinitro 7-ethyl, p-nido, 7e, -
Ya, □−'=). 7e,'-2,e'+? .

[English, Kiha, Buya] (, / A = 2') "1., Ya, Acetic acid, o-Cresol phthalein, "'p-' l L
/solphthalein, phenolphthalein, thymolphthalein, bromophenol barfur, nitroamine, trinitrobenzoic acid, 1,3,5-trinitrobenzene and the like.

The polar solvent, which is one of the main solvents of the pair of ink erasing liquids, is the same as the polar solvent used in the color vehicle of the ink. Examples of acids include inorganic acids such as tie, sulfuric acid and nitric acid, and organic acids such as formic acid, acetic acid, benzoic acid, lactic acid, propionic acid, oxalic acid, succinic acid, sulfuric acid, tartaric acid and citric acid. ``From the standpoint of safety, it is desirable to use carposis acid such as citric acid. A mixed solvent consisting of water and the polar solvent other than water dissolves and disperses the coloring component of the handwriting, which is water-soluble and also compatible with polar solvents other than water, into a single color, and immediately evaporates. 'Emit'. From this K, immediately repeat eM 艷゛.

As mentioned above, the present invention provides a color vehicle formed by dissolving a phenolic resin or the like which is soluble in a polar solvent such as water hydroxide,
An ink consisting of an iron layer coloring agent and a coloring component such as a triphenylmethane-based or quinanthene-based dye or an acid-base indicator such as a phthalein-based dye that is soluble in water and becomes colorless in acidic conditions, and is made of water and other than water. The ink is paired with an ink erasing liquid made by dissolving an acid such as citric acid in a mixed solvent consisting of a polar solvent such as an alcohol, and is erased colorlessly by the ink erasing liquid. Therefore, although the coloring component of the ink according to the present invention is water-soluble and contains no water, the color vehicle does not contain water, so unlike general water-based inks, it is possible to chain not only the absorbing surface but also the non-absorbing surface. be. Furthermore, since the resin is dissolved in the color vehicle, the adhesion of the diary to the writing surface and non-absorbing surface is improved by %.

In addition, the pair of ink erasing liquids is also used, as mentioned above, in which the coloring components of the ink are water-soluble and also soluble in polar solvents such as alcohol, and water and polar solvents such as alcohol are used as the main solvent to erase handwriting. Unlike oil-based ink erasers, the coloring component can be dissolved and dispersed, and unlike oil-based ink erasers, the coloring component can be anything that can bleach water-soluble coloring components, so it is safe to use acids such as enoic acid. , there is no need to use harmful substances. In this way, although the ink according to the present invention has a water-soluble coloring component, it is an anhydrous ink that does not contain water as a coloring agent, so it is possible to write clearly on non-absorbing surfaces, and it also has the best ink erasability. Since it is paired with a liquid, handwriting can be erased easily and reliably, allowing immediate and repeated writing.

Example 1 (purple ink) Acid Red 6B 3m Brilliant Blue FCF 1% Ketone Resin
5 Thiethylene glycol monomethyl ether 8 - Methanol 11 hours Example 2 (red ink) Eosin 3% 70 Xin
1.3-quinoline yellow
α7-rosin modified phenolic resin
3-Ethylene glycol monomethyl ether 41-Ethylene glycol monoethyl ether 411 Example 3 (
Black ink) Acid Piolet, ) 6 B 1.4 Chi Brilliant Blue FCF 12% Two Kokushin 18 Years Quinoline Yellow
171 ketone resin 1
0% ethylene glycol monobutyl ether 8L 9% Example 4 (peach ink) 7 ■Kin, , 10 tyrosine modified phenol resin 9 resin 10'll ethylene glycol monomethyl ether 80% ink eraser! Example 1 Citric acid 5-n-tetrapanol 40% purified water
, 5ff, Ch The mechanism for erasing the pink ink stain in Example 4 is explained by dissolving and scattering one coloring component, fuxin, in a mixed bath of n-propyl alcohol and purified water, and one agent. It forms an inner salt with citric acid and becomes a leucomolecule, becomes colorless, and evaporates.

Patent applicant Hiroo Otsu, agent and patent attorney for Sanshi Dodan Co., Ltd.

Claims (1)

[Claims] An ink consisting of a color vehicle made by dissolving a resin soluble in a polar solvent other than a water tube, and a coloring component such as a dye or an acid-base indicator that becomes colorless when the vehicle is mixed with water and acidic. An ink that exhibits a t-% characteristic when erased colorlessly by an ink erasing liquid made by dissolving an acid in a mixed solvent of water and a polar solvent outside the water plate.