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Ink and its preparation method

A technology of ink and hydrophilic solvent, applied in the field of ink, can solve problems such as difficult to wipe off, hand-dyed clothes, unstable chemical properties, etc., and achieve the effect of overcoming the difficulty of erasing

Inactive Publication Date: 2017-01-18
LKT IND SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some erasable inks on the market, because their pigments or color developers are water-insoluble substances, need to use organic erasing aids when erasing, and this erasable ink is written on the writing board. If it is not wiped for a long time, it will stick to the board, it is difficult to wipe it off, or it is hand-dyed, and it is not easy to clean when it is stained on the desk or clothes when writing; and, because a variety of organic solvents, such as acetone, need to be added in the production process , toluene and other toxic substances, harmful to health
[0004] Other erasing inks on the market use the instability of the pigment or color developer itself to achieve the purpose of fading or eliminating, but due to its extremely unstable chemical properties, the writing retention time is short, and the color will fade soon after writing.

Method used

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  • Ink and its preparation method

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preparation example Construction

[0036] The present invention also provides the preparation method of above-mentioned easily erasable ink, and the preparation method of ink among the present invention mainly comprises the following steps:

[0037] A. Add the thickener to water or a hydrophilic solvent, heat and boil to completely dissolve the thickener, then cool to room temperature, then add an alkali reagent, and stir to dissolve;

[0038] B. Add the chromogen to water or a hydrophilic solvent, stir to fully infiltrate;

[0039] C. Introduce the solution in A into B, and a colored solution will appear, stir to fully react and develop color, until completely reacted and dissolved;

[0040] D. Adjust the pH value to 10-10.5 to obtain the easy-erasable ink of the present invention.

[0041] In other embodiments, in order to enhance the color stability, uniformity and fragrance, you can also add color retention agent, surfactant, and food flavor successively after step C, stir evenly, and then adjust the pH va...

Embodiment 1

[0044] The present embodiment provides a kind of preparation method of red ink:

[0045] A. Add 5g of thickener and 3g of fluorescent yellow dye to 400ml of distilled water, heat and boil to completely dissolve the thickener and fluorescent yellow dye, cool to about room temperature, then add 6g of sodium hydroxide, and stir to dissolve;

[0046] B. Add 12g of red color developer to 30ml of absolute ethanol, stir to make it fully infiltrated;

[0047] C. Introduce the solution in A into B, that is, a red solution will appear, stir to fully react and develop color, until complete reaction and dissolution;

[0048] D. Add 30g of color retaining agent, 1g of surfactant, and 1g of food flavor in sequence in C, and stir evenly;

[0049] E. Adjust the pH value to 10-10.5 to obtain the finished product.

Embodiment 2

[0051] The present embodiment provides a kind of preparation method of blue ink:

[0052] A. Add 7g of thickener to 400ml of distilled water, heat to boil to completely dissolve the thickener, cool to room temperature, then add 10g of sodium hydroxide, stir to dissolve;

[0053] B. Add 15g of blue color developer to 30ml of absolute ethanol, stir to make it fully infiltrated;

[0054] C. Introduce the solution in A into B, that is, a blue solution will appear, stir to fully react and develop color, until the complete reaction dissolves;

[0055] D. Add 30g of color retaining agent, 1g of surfactant, and 1g of food flavor in sequence in C, and stir evenly;

[0056] E. Adjust the pH value to 10-10.5 to obtain the finished product.

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Abstract

The invention relates to ink. The ink mainly comprises a color developing agent and a solvent, wherein the color developing agent is a water-soluble R-hydroxyl-phenyl-isobenzofuranone derivative or an R-hydroxyl-phenylene-isobenzofuranone derivative; the solvent is water or a hydrophilic solvent. According to the ink, the color developing agent for displaying colors is a water-soluble material, so that the ink has the advantages that during ink preparation, the ink can be formed by using the water or the hydrophilic solvent and the ink is environment-friendly and does not affect the health of people; during erasing, the ink can be easily erased by using water available in any place or ordinary erasing objects such as cleaning rags and erasers. In the meantime, the invention provides a preparation method of the easily-erased ink.

Description

technical field [0001] The invention relates to an ink, in particular to an easily erasable color ink and a preparation method thereof. Background technique [0002] Ink is a common item in our daily life. According to different uses, it has developed into multiple categories. For example, it is used in teaching, training, conferences, offices and other information exchange places, as well as erasable ink for children's writing and graffiti. Ink water is generally required to be erased after writing. [0003] At present, some erasable inks on the market, because their pigments or color developers are water-insoluble substances, need to use organic erasing aids when erasing, and this erasable ink is written on the writing board. If it is not wiped for a long time, it will stick to the board, it is difficult to clean it, or it is hand-dyed, and it is not easy to clean when it is stained on the desk or clothes when writing; and, because a variety of organic solvents, such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/17
Inventor 邹学敏李笃信
Owner LKT IND SHENZHEN