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Thermochromic paint and carbonless copy paper containing same

A carbonless copy paper, thermochromic technology, applied in paper coatings, textiles, papermaking, coatings, etc., can solve problems such as the limitation of application scope, and achieve the effect of good anti-counterfeiting effect, low cost and difficult to imitate

Active Publication Date: 2014-02-26
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because such products remove the security thread by cutting, and have anti-counterfeiting settings visible to the naked eye, its application range is limited

Method used

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  • Thermochromic paint and carbonless copy paper containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 50 parts of China clay pigment; 50 parts of ground calcium carbonate; 20 parts of starch, 2 parts of rheological water-retaining agent polyamide; 1 part of styrene-butadiene latex; 1 part of water-resistant agent PAPU; 1 part of lubricant sulfated castor oil; Agent sodium hexametaphosphate 1 part; Surfactant sulfosuccinate 3 parts. Mix the above ingredients, add water and control the solid content to 23% to obtain a mixed paint, and finally add thermochromic microcapsules accounting for 1‰ of the mixed paint mass. Get thermochromic paint (SS paint).

[0045] The coating has a solid content of 23% and a viscosity of 18.4 cps.

Embodiment 2

[0047] 50 parts of China clay pigment; 50 parts of ground calcium carbonate (particle size 1-10 μm); 20 parts of corn starch; 2 parts of rheological water-retaining agent polyamide; 1 part of styrene-butadiene latex; 1 part of castor oil; 1 part of dispersant sodium hexametaphosphate; 3 parts of surfactant sulfosuccinate sodium salt sulfosuccinate. Mix the above ingredients into water and control the solid content to 23% to obtain a mixed paint, and finally add thermochromic microcapsules accounting for 3‰ of the mixed paint to obtain a thermochromic paint (SS paint).

[0048] The coating has a solid content of 23% and a viscosity of 18.5 cps.

Embodiment 3

[0050] 50 parts of China clay pigment; 50 parts of ground calcium carbonate (particle size 1-10 μm); 20 parts of corn starch; 2 parts of rheological water-retaining agent polyamide; 1 part of styrene-butadiene latex; 1 part of castor oil; 1 part of dispersant sodium hexametaphosphate; 3 parts of surfactant sulfosuccinate sodium salt sulfosuccinate. Mix the above ingredients, add water and control the solid content to 23%, to obtain a mixed coating, and finally add thermochromic microcapsules accounting for 4‰ of the mixed slurry mass. Get thermochromic paint (SS paint).

[0051] The coating has a solid content of 23% and a viscosity of 18.5 cps.

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Abstract

The invention discloses a thermochromic paint. The thermochromic paint comprises one or more of starch, a microcapsule, a rheological water retention agent, a latex, a water repellent agent, a lubricating agent, a dispersing agent, an interfacial agent and a thermochromic capsule, wherein the solid content of the paint is 20-30 percent; the thermochromic capsule accounts for 0.0997-0.2997% of the total weight of the paint. According to the paint, the limitation of the prior art is broken through; the paint is colored when carbonless paper with the reversible thermochromic capsule is added at the constant temperature so as not to influence the printing and normal coloring functions of paper; when a product has a temperature of more than 40 DEG C or is contacted with an object at the temperature of 40 DEG C or more, the surface paint of the paper can be gradually faded from coloring until the paint becomes colorless and can be automatically recovered into the original color at the room temperature.

Description

technical field [0001] The invention belongs to the field of pulp mixture, in particular to a starch-containing wet-end chemical for papermaking. Background technique [0002] With the continuous development of the national economy, some famous and high-quality products are counterfeited by criminals with fake and inferior products, which damages the interests of merchants and consumers. Therefore, some signs with anti-counterfeiting functions are urgently needed to protect the brands of these products. The previous temperature-changing anti-counterfeiting paper is difficult to return to the original color after being heated and temperature-changed, but some customers need it to return to the original color due to the purpose of confidentiality. In this case, the previous anti-counterfeiting technology cannot meet the needs of these customers. The research on reversible thermochromic paper is limited to ordinary paper. For example, Dong Cuihua reviewed the preparation, mecha...

Claims

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Application Information

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IPC IPC(8): D21H19/54D21H23/34D21H23/48
Inventor 刘正陈汉彬李娟周晶荣洋阳顾新
Owner GOLD EAST PAPER JIANGSU
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