KR910002679B1 - Process for the preparation of an ink-stick - Google Patents

Abstract

A crude liquid of india ink is prepared by (1) dissolving rosin or rosin ester in phenol or cresol, (2) mixing the solution with 12- 30 wt.% NaOH or KOH solution, (3) diluting the mixture with water, (4) grinding carbonblack mixed with the diluted solution, (5) agitatingly mixing the ground carbonblack with a cohesive aqueous solution, (6) diluting the mixture with water, followed by settling, and (7) removing the precipitate from the liquid. The cohesive aqueous solution is prepared by dissolving casein or polyvinyl alcohol in water and adding 10% conc. ammonia solution.

Description

Manufacturing method of ink ink stock solution

1 is a photograph of particle enlargement (magnification: 200,000 times) by a transmission electron microscope of a float ink prepared by the present invention.

2 is a photograph of particle enlargement (magnification: 200,000 times) by a transmission electron microscope of a conventional Rotling float ink (Rotring, manufactured by Rotling, Federal Republic of Germany).

Figure 3 is a photograph of the ink ink prepared by the present invention, a conventional ink (Pilot ink) and water-based magic ink in order to draw gold on paper and then drop water to measure the bleeding of the ink.

4 is a photograph of the magic ink and the ink of the ink (manufactured by 墨 精, 日本, 墨 運 黨 式 會 社) and the rotling ink (manufactured by the Federal Republic of Germany, Rotling) produced in accordance with the present invention, in order Picture.

The present invention relates to a method for producing an ink ink stock solution. In more detail, the rosin solution is slowly added to the alkaline aqueous solution, and then uniformly mixed. Then, the carbon black is mixed and polished sufficiently, and then mixed with the adhesive aqueous solution. It relates to a method for producing a stock solution.

Conventionally, ink and the like have been manufactured using food or carbon, but these ink can only be used in traditional brushes, and when diluted, the pen tip is clogged or spread on paper and cannot be used in writing instruments. For drawing purposes, the only ink for the float pens sold by the lotling companies in the Federal Republic of Germany. Of course, commercially available inks used in water-based ink, water-based magic, water-ball pens, etc. have been imported from foreign countries, but the letters used in such ink spread when contacted with moisture, and cannot be used in materials such as vinyl paper.

In order to eliminate the above drawbacks, the present inventors have diligently researched and examined, and after dissolving rosin in an organic substance, adding an alkali aqueous solution, diluting the carbon powder, polishing the carbon powder, adding a sticky aqueous solution, and removing the precipitate, ink ink When the raw material is prepared, it is found that the above defects can be eliminated, and complete the present invention; It became.

Hereinafter, the present invention will be described in detail.

Rosin or rosin ester is added to an organic solvent such as phenol and cresol, and heated to dissolve. An aqueous alkali solution is slowly added thereto, stirred, and mixed uniformly, followed by dilution with water. Carbon black is added to this dilution liquid and polished sufficiently. The grinding time may vary depending on the type of grinding machine, but about 8-12 hours is suitable when grinding at 50-80 revolutions per minute. The carbon black polishing liquid was mixed with a viscous aqueous solution such as casein and polyvinyl alcohol, and diluted again with 2.5-3 weight times of water, stirred, and left to stand for 5-10 days. Manufacture.

In the above, the alkaline aqueous solution is an aqueous solution of sodium hydroxide or potassium hydroxide, calcium hydroxide and the like, and sodium hydroxide and potassium hydroxide are preferable. The concentration of the alkaline aqueous solution is 12-30% by weight, but preferably 18-23% by weight. Rosin means commercially available rosin and rosin ester, and the concentration in an organic solvent is 40-50 weight%. Herein, the organic solvent means phenol, cresol, or the like. The primary mixing ratio of water to the rosin solution is preferably 1: 0.7-0.9. This solution is diluted again with about 1.5-2.5 times of water to obtain a carbon black polishing solution.

In the above, the adhesive aqueous solution means that the casein or polyvinyl alcohol is mixed with 6-8 weight times of water, and then produced by adding 0.01-0.03 weight times of ammonia water (10%) after 3-5 hours.

1 is a photograph of particle magnification (magnification: 200,000 times) by a transmission electron microscope of a float ink prepared according to the present invention, and FIG. 2 is a transmission electron microscope of a conventional lotling float ink (manufactured by Lotring, Germany). Particle enlargement (magnification: 200,000 times) is a photograph, and in FIG. 3, a is a line drawn on paper of the ink prepared according to the present invention, b is a line drawn as a lotling ink, and c is an aqueous magic ink. It is a photograph photographing smearing property of ink by drawing a line and dripping water on it, and a in FIG. 4 draws the magic ink manufactured by this invention on a plastic sheet, and b is a line made by lotring company ink. C is uijeongjeong (manufactured by Muk Undang Co., Ltd.), and d is a magic ink made by Pailot Co., Ltd. and photographed the sharpness.

Hereinafter, the present invention will be described in detail with Examples and Test Examples. "%" And "r" in the examples refer to weight percent, weight ratio, unless otherwise specified.

Example 1

(a) 6Kg of rosin and 7Kg of phenol are mixed, dissolved at about 80 ° C, and slowly added 5200cc of 16.1% sodium hydroxide aqueous solution, followed by stirring sufficiently. The mixture is mixed with 4200 cc of water.

(b) 9600 cc of the solution obtained in (a) was mixed and sufficiently stirred, and then mixed with carbon black (trade name: Robin) and 10 Kg, followed by polishing for 10 hours.

(c) 2 kg of casein was dissolved in 14000 cc of water, and after 4 hours, 300 cc of ammonia water (10%) was added to prepare a viscous aqueous solution.

(d) 13,000cc of the viscous aqueous solution prepared in (c) was mixed with the carbon black polishing liquid prepared in (b), stirred well, and then water was added thereto to make 70,000cc, and allowed to stand for 7 days. Used as an ink stock solution.

Experimental Example 1 (ink for aqueous ballpoint pen)

40 cc of the ink ink stock solution prepared in Example 1 was mixed with 20 cc of rosin solution and 10 cc of water in Example (a), and stirred to prepare an ink for an aqueous ballpoint pen. As a result of using it, there was no bleeding as shown in FIG.

[Test Example 2] (Ink for aqueous ballpoint pen)

400 cc of the ink ink stock solution prepared in Example 1, 20 cc of the rosin solution prepared in Example 1 (a), 10 cc of water, and 2.5 cc of ethylene glycol were mixed and sufficiently stirred. As a result of using the empty magic pen, there was no bleeding, and as shown in FIG. 4, the glass or plastic paper was slipped and the magic ink did not volatilize even after 30 days of use.

[Test Example 3] (drawing pen ink)

40 cc of the ink ink stock solution prepared in Example 1 was prepared by mixing 10 cc of water and 7.5 cc of ethylene glycol. As a result of putting in the drawing pen (0.1 mm lot ring pen) thus prepared, the lot ring ink was easily clogged, but the ink of the present invention was not clogged and there was no bleeding.

Comparative test analysis of the float ink of the present invention prepared by the method as described above and the existing rotting ink (Rotring ink) as a result of the enlarged particle by the transmission electron microscope of Figs. 1 and 2, (magnification: 200,000 times) As shown in Fig. 3, the particles were finer than the conventional lotring float ink (manufactured by the lotling company of the Federal Republic of Germany) so that there was no clogging of the drawing pen by ink. In addition, when the ink was requested by the National Institute of Industrial Testing, the following results were obtained in Table 1.

TABLE 1

(Test results of National Institute of Industrial Testing, KS 5435-83 and KSK 0700-82 samples)

As described above, the ink ink stock solution according to the present invention can be widely used in magic ink, ball pen ink, drawing ink, and the like.The ink has fine writing particles (see FIG. 1) and has excellent writing performance, water resistance, Not only is it excellent in chemical resistance, it is also an excellent product without whitening.

Claims (4)

The rosin compound is dissolved in a solvent such as phenol or cresol, mixed with an aqueous alkali solution, mixed with water, and then polished with carbon black solution, mixed with viscous aqueous solution, stirred, diluted with water, and left to stand to remove precipitates. Method for producing a ink ink stock solution characterized in that. The method of claim 1 wherein the rosin compound is a rosin, a rosin ester. The method of claim 1 wherein the alkaline aqueous solution is a 12-30% by weight aqueous solution of sodium or potassium hydroxide. The method according to claim 1, wherein the aqueous adhesive solution is prepared by dissolving casein or polyvinyl alcohol in 6-8 weight times of water and then adding 0.01-0.03 weight times of ammonia water (10%).

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