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A kind of reversible thermochromic printing ink and its preparation method and application

A printing ink and thermochromic technology, which is applied in the field of inkjet printing, can solve the problems of color-changing inks that have not yet been found, and achieve the effects of stable printing performance, prevention of uneven dispersion, and uniform dispersion of the system

Active Publication Date: 2021-04-16
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, although there is no lack of research on color-changing inks in the prior art, no relevant reports have been found on the use of color-changing inks for the production of camouflage coatings

Method used

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  • A kind of reversible thermochromic printing ink and its preparation method and application
  • A kind of reversible thermochromic printing ink and its preparation method and application
  • A kind of reversible thermochromic printing ink and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the thermochromic printing ink provided in this embodiment comprises the following steps:

[0041] (1) thermochromic material [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 preparation of

[0042] CuCl 2 2H 2 O 17g and (C 2 h 5 ) 2 Dissolve 21.2g of NH·HCl in 140g of deionized water, stir and mix evenly, react in a constant temperature water bath at 70°C for 2 hours, take it out and cool to room temperature, after the solid precipitates, filter it with absolute ethanol, collect the solid, and weigh it with absolute ethanol Crystallize twice, put the crystals into a vacuum drying oven, and dry them at 60°C for 3 hours to obtain 38 g of bright green needle-like crystals, namely [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 .

[0043] After testing, [(C 2 h 5 ) 2 NH 2 ] 2 CuCl4 The purity is 99.99%, the grain size is 18-31μm, and the relative humidity is 15%.

[0044] (2) Preparation of printing ink

[0045] Slowly add 25.5 g of acrylic resin emulsion (its...

Embodiment 2

[0051] The preparation method of the thermochromic printing ink provided in this embodiment comprises the following steps:

[0052] (1) thermochromic material [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 preparation of

[0053] CuCl 2 2H 2 O 17g and (C 2 h 5 ) 2 Dissolve 19.7g of NH·HCl in 120g of deionized water, stir and mix evenly, react in a constant temperature water bath at 60°C for 2 hours, take it out and cool to room temperature, after the solid precipitates, filter it with absolute ethanol, collect the solid, and weigh it with absolute ethanol Crystallize twice, put the crystals in a vacuum drying oven, and dry them at 60°C for 3 hours to obtain 34.1 g of bright green needle-like crystals, namely [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 .

[0054] After testing, [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 The purity is 99.9%, the grain size is 10-39μm, and the relative humidity is 12%.

[0055] (2) Preparation of printing ink

[0056] Slowly add 25 g of water-based acrylic resin so...

Embodiment 3

[0059] The preparation method of the thermochromic printing ink provided in this embodiment comprises the following steps:

[0060] (1) thermochromic material [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 preparation of

[0061] CuCl 2 2H 2 O 17g and (C 2 h 5 ) 2 Dissolve 16.4g of NH·HCl in 120g of deionized water, stir and mix evenly, react in a constant temperature water bath at 65°C for 2h, take it out and cool to room temperature, after the solid precipitates, filter it with absolute ethanol, collect the solid, and weigh it with absolute ethanol Crystallize twice, put the crystals in a vacuum drying oven, and dry them at 60°C for 3 hours to obtain 29 g of bright green needle-like crystals, namely [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 .

[0062] After testing, [(C 2 h 5 ) 2 NH 2 ] 2 CuCl 4 The purity is 99.99%, the grain size is 16-42μm, and the relative humidity is 20%.

[0063] (2) Preparation of printing ink

[0064] Slowly add 17.5 g of polyvinyl alcohol to 22.5 g of d...

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Abstract

The invention provides a reversible thermochromic printing ink and its preparation method and application. The printing ink is composed of a thermochromic material, a linking material, an antibacterial agent and deionized water. By selecting [(C 2 H 5 ) 2 NH 2 ] 2 CuCl 4 As a thermochromic material, it is equipped with water-based acrylic resin and / or polyvinyl alcohol as a linking material and deionized water as a solvent. The synergistic effect between the above three makes the coating printed by the ink of the present invention to be at room temperature. It is green at lower temperatures, yellow at higher temperatures (52°C and above), and returns to green when the temperature drops below 52°C; and since the raw materials for preparing the ink of the present invention are all dissolved in water at the molecular level except for the linking material, The linking material exists in the form of emulsion, so the ink of the present invention will not cause nozzle clogging, and the printing performance is stable. It can be seen that the ink of the present invention can be used for printing camouflage coatings.

Description

technical field [0001] The invention belongs to the technical field of inkjet printing, and in particular relates to a water-based reversible thermochromic inkjet printing ink which can be used to prepare self-adaptive camouflage coatings, a preparation method and application thereof. Background technique [0002] Inkjet printing technology is a non-contact digital printing technology that inputs the required pattern into the computer in digital form, directly sprays ink onto the substrate after image processing, and prints various patterns. This technology gets rid of the dilemma of high energy consumption, high emission, high pollution and low added value of the traditional printing process, and has obvious advantages such as simple production process, breaking the restrictions of traditional color registration and printing, low energy consumption and low pollution. [0003] One of the keys to inkjet printing technology is the printing ink. Inkjet printing inks are mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/50C09D11/30C09D11/38
CPCC09D11/30C09D11/38C09D11/50
Inventor 程海峰王楠楠谢东津张朝阳刘东青李赟
Owner NAT UNIV OF DEFENSE TECH
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