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A coating capable of repeated writing, an object capable of repeated writing and a preparing method of the object

A technology for coatings and objects, applied in the field of rewritable coatings, objects and their preparation, can solve the problems of multiple synthesis steps, complex preparation process, and limited magnification and application, and achieve simple operation, high printing accuracy, and long-lasting writing long effect

Active Publication Date: 2016-05-04
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is relatively complicated, and the synthesis steps are many, which limits its further scale-up application.

Method used

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  • A coating capable of repeated writing, an object capable of repeated writing and a preparing method of the object
  • A coating capable of repeated writing, an object capable of repeated writing and a preparing method of the object
  • A coating capable of repeated writing, an object capable of repeated writing and a preparing method of the object

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] rewritable coating

[0039] A rewritable coating comprising a photochromic material, a hydrogel, and a humectant, said coating exhibiting a color change in the ultraviolet wavelength range but not in the visible light range;

[0040] Wherein, the photochromic material is spiropyran, the hydrogel is polyethylene glycol hydrogel, and the moisturizing agent is sodium nitrate; the weight content of the photochromic material accounts for 0.5% of the total weight of the rewritable coating, and the hydrogel The weight content of the glue accounts for 99.49% of the total weight of the rewritable coating, and the weight content of the moisturizing agent accounts for 0.01% of the total weight of the rewritable coating;

[0041] The thickness of the rewritable coating is 6 μm.

[0042] rewritable object

[0043] A rewritable object, which includes a substrate, the rewritable coating of this embodiment disposed on the substrate and a protective layer disposed on the rewritabl...

Embodiment 2

[0055] rewritable coating

[0056] A rewritable coating comprising a photochromic material, a hydrogel, and a humectant, said coating exhibiting a color change in the ultraviolet wavelength range but not in the visible light range;

[0057] Among them, the photochromic material is naphthopyran, the hydrogel is polyacrylic acid hydrogel, and the moisturizing agent is sodium alginate; the weight content of the photochromic material accounts for 0.1% of the total weight of the rewritable coating, and the hydrogel The weight content of the glue accounts for 99.88% of the total weight of the rewritable coating, and the weight content of the moisturizing agent accounts for 0.02% of the total weight of the rewritable coating;

[0058] The thickness of the rewritable coating is 5 μm.

[0059] rewritable object

[0060] A rewritable object, which includes a substrate, the rewritable coating of this embodiment disposed on the substrate and a protective layer disposed on the rewrit...

Embodiment 3

[0072] rewritable coating

[0073] A rewritable coating comprising a photochromic material, a hydrogel, and a humectant, said coating exhibiting a color change in the ultraviolet wavelength range but not in the visible light range;

[0074] Wherein, the photochromic material is naphthoquinone, the hydrogel is polyacrylamide hydrogel, and the moisturizing agent is sodium alginate; the weight content of the photochromic material accounts for 10% of the total weight of the rewritable coating, and the hydrogel The weight content of the moisturizing agent accounts for 89.97% of the total weight of the rewritable coating, and the weight content of the moisturizing agent accounts for 0.03% of the total weight of the rewritable coating;

[0075] The thickness of the rewritable coating is 7 μm.

[0076] rewritable object

[0077] A rewritable object, which includes a substrate, the rewritable coating of this embodiment disposed on the substrate and a protective layer disposed on ...

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Abstract

A coating capable of repeated writing is disclosed. The coating comprises a photochromic material and / or an acidichromism material. The color of the coating changes in a preset wavelength range and does not change in a visible light range, and / or the color of the coating changes in an acid pH range and does not change in an alkaline pH range. An object capable of repeated writing and a preparing method thereof are also disclosed. The coating is advantaged by a simple preparation process, a low cost, high printing precision and long handwriting duration time.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a rewritable coating, an object and a preparation method thereof. Background technique [0002] Papermaking is one of the four great inventions in ancient China. As an information carrier, paper has greatly promoted the spread and development of culture. However, the paper currently on the market is often disposable, which not only wastes resources but also pollutes the environment. Therefore, both at home and abroad are developing rewritable coatings that can be reused many times and have less pollution in the preparation process to replace traditional paper. In 2014, Zhang Xiaoan's research group at Jilin University invented a "water-jet inkless printing" technology. The core of this technology is to load the water-induced color dye oxazolidine coating on the paper. Disappear in order to achieve reuse. This technology can print font size 5 on paper, but the colors that can be printed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C09D133/02C09D133/26C09D129/04C09D7/12
CPCC08K5/1545C08K5/353C09D7/63C09D129/04C09D133/02C09D133/26C09D171/02C08L5/04C08K5/357C08K5/23C08K5/08
Inventor 杜学敏崔欢庆吴天准王娟唐天洪
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI