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Irreversible thermally induced decoloring printing ink and preparation method thereof

An irreversible thermal and decolorization technology, applied in the direction of ink, chemical instruments and methods, color-changing fluorescent materials, etc., can solve the problems of limited application range and inconvenient use, and achieve the effect of recycling and controllable elimination of printed characters

Inactive Publication Date: 2012-07-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uncertainty of the fading time of the automatic fading ink, the fading of the water fading ink depends on the humidity of the environment, so there are many inconveniences in use, which limits its application range

Method used

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  • Irreversible thermally induced decoloring printing ink and preparation method thereof
  • Irreversible thermally induced decoloring printing ink and preparation method thereof
  • Irreversible thermally induced decoloring printing ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] At 35°C, take 100g of acetone, add color developer: 1-30g of hydroquinone, stir and dissolve, add solubilizer: 1-30g of naphthalene, stir and dissolve, add leuco dye: amino malachite green lactone 1-30g , Stir and dissolve to form a transparent solution and form a leuco ink. Fill the ballpoint pen with ink. When writing on paper, the handwriting will turn green with the evaporation of acetone. The color retention time at room temperature, decolorization temperature and time required for decolorization of handwriting are shown in the table below:

[0034]

Embodiment 2

[0036] At 20°C, take 100g of ethanol, add developer: 1-30g of phenol, stir to dissolve, add solubilizer: naphthalene 1-30g, stir to dissolve, add leuco dye: crystal violet lactone 1-30g, stir to dissolve Form a transparent solution and form a leuco ink. Fill the ballpoint pen with ink. When writing on paper, the handwriting will turn blue with the evaporation of ethanol. The color retention time at room temperature, decolorization temperature and time required for decolorization of handwriting are shown in the table below:

[0037]

Embodiment 3

[0039] At 25°C, take 100g of mixed solution of ethanol and acetone in different proportions, add color developer: 1-30g of naphthol, stir and dissolve, add solubilizer: p-dichlorobenzene 1-30g, stir and dissolve, add leuco dye: 3,3-bis(1-octyl-2-indol-3-yl)phthalide 1~30g, stir and dissolve to form a transparent solution and form leuco ink, fill the ballpoint pen with ink, and write on paper , the handwriting turns rose red with the evaporation of ethanol and acetone. The color retention time at room temperature, decolorization temperature and time required for decolorization of handwriting are shown in the table below:

[0040]

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Abstract

The invention relates to printing ink and a preparation thereof and aims to provide irreversible thermally induced decoloring printing ink and a preparation method thereof. The method comprises the following steps: adding a color-developing agent, a solubilizing agent, leuco dye, a lubricating agent, a tackifier, a filling agent and a crosslinking agent sequentially in an organic solvent according to the mass ratio of the specified components; adding the next component after stirring and dissolving the previous component; and finally stirring and dissolving to obtain the irreversible thermally induced decoloring printing ink. The printing ink can develop color at a low temperature, decolor after being heated and still maintain colorless after being cooled, so the function of decoloration control can be realized through temperature control, decoloration can be controlled in the aspects of ground pattern design of various embroideries and design and marks of various clothing, shoes and hats, shoe making and the like, and the manual elimination procedure of eliminating various marks is omitted in the production process of the products. The irreversible thermally induced decoloring printing ink is used for printing so as to eliminate printing writing controllably and realize recycling of paper.

Description

technical field [0001] The invention relates to an irreversible thermal decolorization ink and a preparation method. In particular, it relates to an irreversible heat-induced decolorization ink prepared by leuco dyes as chromogen, chromogen, organic solvent, tackifier, filler, lubricant, solubilizer, and crosslinking agent and a preparation method thereof. Background technique [0002] Temperature-changing (heat-sensitive) ink is a novel color-changing ink, which can change color rapidly with the change of ambient temperature, so that the colored object has a dynamically changing color effect. Temperature-changing inks can be divided into reversible temperature-changing inks and irreversible temperature-changing inks. There are three types of reversible temperature-changing inks: color development, color elimination, and color change. Color-developing reversible temperature-changing inks are colorless in appearance, and show color after being heated, and the color disappea...

Claims

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Application Information

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IPC IPC(8): C09D11/02C09D11/16C09K9/02C09D11/50
Inventor 李睿李洲鹏刘宾虹
Owner ZHEJIANG UNIV
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