KR20010068200A - Method of making ink for blue blackboard - Google Patents

Abstract

PURPOSE: Provided is a preparation method of non-absorbent and easily erasable ink for the blackboard green marker which is used on the light green blackboard like a conventional white chalk blackboard. CONSTITUTION: The ink is produced by the steps of: adding 2.5-3.0wt.% of polyvinylbutyral resin containing less than 5% of acetate to 15-16wt.% of ethylene glycol monobutyl ether and dissolving completely at 80-90deg.C and cooling; adding 5-6 wt.% ethylene glycol and 14-15 wt.% aliphatic alkylester to above mixture and plasticizing the resin; adding 28-29wt.% titanium oxide, 2-3wt.% of dyes selected from red, blue and green dye, 1.0-1.5wt.% of alcoholic dispersant, 0.5-0.7wt.% of non-silicone antifoaming agent and 1-2wt.% of anti-settling agent and dispersing completely and mixing this mixture with 28-34wt.% of ethyl alcohol to make colored ink.

Description

Manufacturing method of ink for green marker blackboard {METHOD OF MAKING INK FOR BLUE BLACKBOARD}

The present invention relates to a method for producing ink for green marker blackboards, and more particularly, to a method for preparing ink having good adsorptive and erasable properties, which can be used for a blackboard prepared by coating a special green paint such as a plain chalk board on a steel sheet. will be.

The chalk that has been used up to now has an effect on occupational diseases such as instructor's respiratory disorder and classroom environment due to dust generated when writing or erasing. The marker pen developed by supplementing this with black or colored marker pens on the whiteboard writing board on the white background makes the subject's eyes easily feel tired and the learning effect is inferior due to reflection by the light of the light. In use, it has a disadvantage that the eraseability is reduced by scratching the whiteboard.

Therefore, the present invention provides ink that can be filled in a marker pen that can be used on a pale green-based blackboard that visually stabilizes the steel sheet as a base to solve the problems on the human body and surrounding environment due to the use of chalk and the shortcomings of the existing whiteboard. Its purpose is to provide a method for producing the same.

The present invention according to the first aspect for achieving the above object is a high ratio of polyvinyl butyral resin of 5% or less acetate soluble in an alcohol solvent for film formation is maintained at 80 ~ 90 ℃ by indirect heat After dissolving in ethylene glycol monobutyl ether as a point solvent, ethylene glycol and fatty acid alkyl ester are added and mixed, and then, titanium oxide, colored pigment, dispersant, antifoaming agent, fluorescent brightener, anti-settling agent, etc. are added thereto. After thoroughly mixing, and then mixing it with a low-boiling solvent ethyl alcohol to propose a method for producing a green marker blackboard ink consisting of a process for producing white and colored (red, blue, yellow) ink.

Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, it should be noted that in the following description, only parts necessary for understanding the water-soluble detergent of the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

According to a preferred embodiment of the present invention, immediately after writing and after a long time, the erase, the oil spreading around the writing, bleeding phenomenon, etc., ethylene glycol for the plasticization of the resin, preferably 2,2,4-trialkyl- Mixing ratio of 1,3-alkanediol monoisoalkyl ester with fatty acid alkyl ester for improving the lubrication of the writing surface and releasability after film formation, ethylene glycol monobutyl for controlling the drying rate, distillation and vapor pressure in the marker pen Since it affects the mixing ratio of ether and ethyl alcohol, it can be prevented by appropriately adjusting the mixing ratio. In addition, in the case of a white ink, an organic fluorescent brightener rather than an inorganic material having a high specific gravity is used to increase hiding power, thereby preventing layer separation.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment.

{Example 1}

15-16% by weight of a high boiling point solvent, ethylene glycol monobutyl ether, was added to a mixer equipped with a double jacket for condensation, a condense, and a high speed stirrer capable of controlling speeds up to 5,000 rpm, and maintained at a temperature of 80 to 90 ° C. 2.5 to 3.0% by weight of polyvinyl butyral resin was added to dissolve completely and cooled. Thereafter, 5 to 6% by weight of 2,2,4-trialkyl-1,3-alkanediol monoisoalkyl ester and 11 to 12% by weight of fatty acid alkyl ester were added to plasticize the resin, and then again 30 to 31% by weight of titanium oxide, 0.5 to 1.0% by weight of unsaturated modified carboxylic acid dispersant, 0.5 to 0.7% by weight of non-silicone antifoaming agent, 1 to 2% by weight of inorganic antisettling agent, 0.1% by weight of organic fluorescent brightener, 30 to 40 The particles of titanium oxide were dispersed at high speed for a minute. Next, 28 to 34% by weight of ethyl alcohol, which is a low boiling point solvent, was added to the completely dispersed liquid mixture, and the mixture was mixed at low speed to prepare a white ink.

Meanwhile, the white ink prepared by the above method is filled in a marker pen and written on the vertical light green chalkboard in the same way as the general chalk board, and then the hiding power, spillage, lubricity, initial erase property, erasing property and font surrounding after a long time The physical properties such as oil spreading and dripping phenomenon of was evaluated, which is shown in detail in Table 1 below.

{Example 2}

15-16% by weight of a high boiling point solvent, ethylene glycol monobutyl ether, was added to a mixer equipped with a double jacket, condensation capable of supplying indirect heat, and a high-speed stirrer capable of controlling speed up to 5,000 rpm, and maintained at a temperature of 80-90 ° C. The polyvinyl butyral resin was added 2.5 to 3.0% by weight while completely dissolved and then cooled. Thereafter, 5 to 6% by weight of 2,2,4-trialkyl-1,3-alkanediol monoisoalkyl ester and 14 to 15% by weight of fatty acid alkyl ester are added to plasticize the resin, and then again 30 to 40 minutes by adding 28 to 29% by weight of titanium oxide, 2 to 3% by weight of red pigment, 1.0 to 1.5% by weight of alcohol-based dispersant, 0.5 to 0.7% by weight of non-silicone antifoaming agent, and 1 to 2% by weight of inorganic anti-settling agent Titanium oxide and red pigment particles were dispersed at high speed. Next, 24 to 31% by weight of ethyl alcohol, which is a low boiling point solvent, was added to the completely dispersed liquid mixture, and the mixture was mixed at low speed to prepare a red ink.

On the other hand, the red ink prepared by the above method was filled in the marker pen was carried out in the same manner as in Example 1, the results are shown in Table 1 in detail.

{Example 3}

The manufacturing method is the same as that of Example 2 except having used 2-3 weight% of blue pigments.

The blue ink prepared in Example 3 was filled in a marker pen, and the same procedure as in Example 1 was performed. Evaluation of physical properties of the blue ink is shown in Table 1.

{Example 4}

The manufacturing method is the same as that of Example 2 except having used 2-3 weight% of yellow pigments.

The yellow ink prepared in Example 4 was filled in a marker pen, and the same procedure as in Example 1 was performed. Evaluation of physical properties of the yellow ink is shown in Table 1.

{Table 1} Property Evaluation

Section Item Example 1 Example 2 Example 3 Example 4 Spent oil lubrication oil oil spread and run down Excellent Excellent Excellence Excellent Excellent Excellence Excellent Excellent Excellence Excellent Excellent Excellence

As described above, when the ink prepared according to the method of the present invention is filled in a marker pen and used on a green board, the color is clear like chalk, thereby relieving the visual fatigue of the subjects and improving concentration. It has the advantage of increasing the effect, protecting the instructor's health, and erasing the board easily without scratching.

Claims (3)

In the manufacturing method of the ink for a green marker blackboard, 15 to 16% by weight of ethylene glycol monobutyl ether at 80 to 90 ° C was added 2.5 to 3.0% by weight of polyvinyl butyral resin having an acetate content of 5% or less, completely dissolved, and then cooled. After plasticizing the resin by adding 11% by weight to 11% by weight of fatty acid alkyl ester, it is further added with 30 to 31% by weight of titanium oxide, 0.5 to 1.0% by weight of unsaturated modified carboxylic acid dispersant, and 0.5 to 0.7 of non-silicone antifoaming agent. By weight, by adding 1 to 2% by weight of inorganic anti-settling agent, 0.1% by weight of organic fluorescent brightener completely dispersed, and then mixed with 28 to 34% by weight of ethyl alcohol to produce a white ink Method for preparing ink In the manufacturing method of the ink for a green marker blackboard, 15 to 16% by weight of ethylene glycol monobutyl ether at 80 to 90 ° C was added 2.5 to 3.0% by weight of polyvinyl butyral resin having an acetate content of 5% or less, completely dissolved, and then cooled. After plasticizing the resin by adding 14% by weight to 14% by weight of fatty acid alkyl ester, it was again colored 28-29% by weight of titanium oxide, selected from the group consisting of {red pigment, blue pigment, yellow pigment}. 2 to 3% by weight of pigment, 1.0 to 1.5% by weight of alcohol-based dispersant, 0.5 to 0.7% by weight of non-silicone antifoaming agent, and 1 to 2% by weight of inorganic anti-settling agent are added and completely dispersed, and then mixed with 24 to 31% by weight of ethyl alcohol. A method of producing ink for a green marker blackboard, characterized in that to produce colored ink. The method of claim 1 or 2, wherein the ethylene glycol is a 2,2,4-trialkyl-1,3-alkanediol monoisoalkyl ester.