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Reversible temperature-sensitive color-changing neutral ink

A temperature-sensitive discoloration, neutral ink technology, used in inks, household appliances, applications, etc., can solve the problems of material defects, wrong handwriting difficult to erase, leaving traces, etc., to achieve easy modification and elimination. Effect

Inactive Publication Date: 2019-04-30
金文华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] China is a big market for neutral inks. The neutral inks on the market now use traditional pigments. If there is a writing error that needs to be corrected, it is difficult to erase the wrong writing, and more or less there will be traces , leaving flaws in the recorded material
At the same time, in the process of modifying or removing handwriting, paper powder and paper dust will be generated, which will pollute the surrounding environment.
[0003] In order to achieve writing and solve the trouble of modification during the writing process, a kind of erasable ink called "magic liquid" appeared on the market. Its principle is to use the color of certain dyes to change due to changes in pH Color elimination and display, for example, some dyes can only develop color under acidic conditions, but are colorless under alkaline conditions, so we use this dye to make acid ink, and use alkaline medicines to make " "Magic liquid" is easy to fade. This method solves the difficulty of handwriting modification, but it has a fatal shortcoming. Since "magic liquid" is an alkaline drug, there will be residues in the modified place, and the result is Although the color is eliminated, it cannot be rewritten due to the residue of the "magic liquid", so it can only be eliminated, but not rewritten, which limits its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 4wt% 3,3-bis(4-dimethylaminophenyl)-6-dimethylaminophthalide; 12wt% color developer bisphenol A, and 84wt% organic solvent as a phase change agent. Heat to mix well. Add it to the system containing amino resin and emulsifier styrene maleic anhydride to disperse at a high speed to obtain uniform spherical fine particles, heat and keep warm to obtain reversible discoloration microcapsules. Cool into colored pigment microcapsules.

[0027] Add 10, 15 or 20 parts by mass of water-soluble organic humectant (glycerol; ethylene glycol; propylene glycol) to 30, 40 or 50 parts by mass of reversible color microcapsule pigment paste; 0.1, 0.6 or 1.0 The preservative iodopropynyl butyl carbamate (IPBC) of mass parts; 0.1,0.6 or 1.0 mass parts rust inhibitor (benzotriazole); Add viscosity regulator (xanthan gum; Acrylic emulsion; Formaldehyde cellulose sodium salt).

Embodiment 2

[0029] 5wt% 3-dibutylamino-6-methyl-7-anilinofluorane; 12wt% chromogenic agent bisphenol P, and 84wt% organic solvent as a phase change agent. Heat to mix well. Add it to the system containing amino resin and emulsifier styrene maleic anhydride to disperse at a high speed to obtain uniform spherical fine particles, heat and keep warm to obtain reversible discoloration microcapsules. Cool into colored pigment microcapsules.

[0030]Add 10, 15 or 20 parts by mass of water-soluble organic humectant (glycerol; ethylene glycol; propylene glycol) to 30, 40 or 50 parts by mass of reversible color microcapsule pigment paste; 0.1, 0.6 or 1.0 The preservative iodopropynyl butyl carbamate (IPBC) of mass parts; 0.1,0.6 or 1.0 mass parts rust inhibitor (benzotriazole); Add viscosity regulator (xanthan gum; Acrylic emulsion; Formaldehyde cellulose sodium salt).

[0031] If the leuco dyes in Examples 1 and 2 are replaced with leuco dyes capable of developing other colors, the color of the...

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PUM

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Abstract

The invention discloses a reversible temperature-sensitive color-changing neutral ink, which comprises, by mass, 30-50 parts of a reversible temperature-sensitive color-changing microcapsule pigment paste, 10-20 parts of a water-soluble organic humectant, 0.1-1.0 part of iodopropynyl butyl carbamate (IPBC) as a preservative, and 0.1-1.0 part of benzotriazole as an anti-rust agent. According to thepresent invention, the reversible temperature-sensitive color-changing neutral ink has the pH value of 7-9, is safely and reliably used, and can achieve color developing and color eliminating effectat a certain phase transition temperature so as to achieve the purpose of writing modification.

Description

technical field [0001] The invention relates to a neutral ink, in particular to a reversible temperature-sensitive color-changing neutral ink. Background technique [0002] China is a big market for neutral inks. The neutral inks on the market now use traditional pigments. If there is a writing error that needs to be corrected, it is difficult to erase the wrong writing, and more or less there will be traces , leaving flaws in the recorded material. At the same time, in the process of modifying or removing handwriting, paper powder and paper dust will be generated, which will pollute the surrounding environment. [0003] In order to achieve writing and solve the trouble of modification during the writing process, a kind of erasable ink called "magic liquid" appeared on the market. Its principle is to use the color of some dyes to change due to changes in pH Color elimination and display, for example, some dyes can only develop color under acidic conditions, but are colorle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/18
CPCC09D11/18
Inventor 金文华
Owner 金文华
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