Dustless board writing liquid and liniment for the same

A technology for writing liquid and dust board, which is applied in chemical paint/ink remover, ink, household utensils, etc. It can solve the problems of easy deposition of long-term pigments, high cost, and cumbersome production process, so as to achieve smooth writing and low cost , The effect of simple production process

Inactive Publication Date: 2007-02-07
SHANGHAI WUZHIFENG INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The writing liquid has the advantages of using water as a solvent, being dust-free, and convenient for writing, but its production process is cumbersome, the cost is high, and the pigment is easy to deposit after long-term storage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The specific formula of blue dust-free board writing liquid:

[0034] 2,6-dichloroindophenol sodium 50g

[0035] Sodium bicarbonate 2.5g

[0036] Sodium Lauryl Sulfate 1.5g

[0037] AEO 1g

[0038] Polyvinyl alcohol 3g

[0039] Ethylene glycol 28ml

[0040] Benzoic acid 0.5g

[0041] Ethanol 15ml

[0042] Distilled water 900ml

[0043] Preparation: Weigh each component according to the above ratio, first add polyvinyl alcohol into 100ml of distilled water, heat to completely dissolve the polyvinyl alcohol, add the dissolved concentrated solution of polyvinyl alcohol into 800ml of distilled water and stir evenly, and successively dissolve the remaining Add the ingredients and stir well to make the solution evenly mixed. Use a watering can to spray about 15ml of ethanol to the surface of the solution to eliminate foam, and obtain the blue writing solution.

Embodiment 2

[0045] The specific formula of red writing liquid:

[0046] Acid Fuchsin 54g

[0047] Basic Fuchsin 4.9g

[0048] Ascorbic acid 1.4g

[0049] Sodium Ascorbate 2.7g

[0050] AEO 2g

[0051] Polyacrylic acid 1.5g

[0052] Glycerin 21ml

[0053] Benzoic acid 0.6g

[0054] Distilled water 910ml

[0055] Preparation: Weigh each component according to the above ratio, first add polyacrylic acid to 50ml of distilled water, heat to completely dissolve the polyacrylic acid, add the dissolved polyacrylic acid concentrated solution to 860ml of distilled water and stir evenly, and successively dissolve the remaining Add the components, stir well to make the solution mix evenly, and then get the red writing solution.

Embodiment 3

[0057] The specific formula of purple writing liquid:

[0058] Methyl Violet 50g

[0059] Sodium bicarbonate 1.8g

[0060] AES 1g

[0061] Polyvinyl alcohol 4g

[0062] Dimethyl sulfoxide 22ml

[0063] Benzoic acid 0.8g

[0064] Isopropanol 18ml

[0065] Distilled water 900ml

[0066] Preparation: Weigh each component according to the above ratio, first add polyvinyl alcohol into 50ml of distilled water, heat to completely dissolve the polyvinyl alcohol, add the dissolved concentrated solution of polyvinyl alcohol into 850ml of distilled water and stir evenly, and successively dissolve the remaining The components are added, fully stirred to make the solution mix evenly, and the purple writing solution is obtained.

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PUM

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Abstract

The invention discloses a dustfree board writing liquid and erasing agent, wherein the writing liquid comprises the following parts: colorant, pH adjusting agent, surface activating agent, filming agent, antifreezing agent, antiseptic agent, defoamer and distilled water.

Description

technical field [0001] The invention relates to a writing ink, in particular to a dust-free board writing liquid and a wiper suitable for writing on a light-colored dust-free board. Background technique [0002] "Blackboard chalk" is a representative of traditional teaching methods, and it is also the most widely used and oldest teaching method. However, chalk is written by friction, which is laborious to write, has friction sound, and is easy to break when writing. Especially in the process of writing and erasing, a large amount of dust will be generated, which seriously pollutes the teaching environment and endangers the health of teachers and students. There have also been "dust-free chalk", "dust-free chalk", "magnetic chalk" etc. for this reason, but their production technology and raw materials and writing methods do not completely overcome the disadvantages of chalk dust. [0003] In order to fundamentally solve the problem of pen dust, there are many kinds of dust-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16C09D9/04
Inventor 董文娟李建晴李俊双少敏董川
Owner SHANGHAI WUZHIFENG INFORMATION TECH
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