A kind of water-changing and non-diffusion ink and its preparation method and application

A technology that changes color and ink when it encounters water. It is applied in the field of ink, which can solve the problems of user injury, environmental pollution, discoloration, etc., and achieve the effect of reducing the amount of use.

Active Publication Date: 2021-03-02
东莞市卡勒贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] One of the traditional water-changing inks is a pure organic solvent-based microcapsule system, but the organic solvent of this pure organic solvent-based microcapsule system ink is easy to volatilize, which will cause poor construction environment, pollute the environment, and is not conducive to environmental protection , will also cause some harm to the user; another indicator that is sensitive to humidity will cause its own color to change when stored in a humid environment, resulting in the failure of the color change indicator, and its practical application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An ink that changes color when exposed to water and does not spread, comprising the following raw materials in parts by weight:

[0040] 40 parts of water-based film-forming resin

[0041] Strong acid and weak alkali metal salt 0.5 parts

[0042] Charged pH indicator 0.5 parts

[0043] Polymer adsorption resin 0.5 parts

[0044] 25 parts of solvent;

[0045] Wherein, the solvent is water or a mixture of water and an organic solvent.

[0046] The water-based film-forming resin is water-based acrylate.

[0047] The metal ion of the strong acid and weak alkali metal salt is aluminum ion, specifically the strong acid and weak alkali salt is aluminum chloride.

[0048] The charged pH indicator is methyl yellow.

[0049] The polymer adsorption resin is ethylene-vinyl acetate copolymer, and the mass percentage of vinyl acetate in the ethylene-vinyl acetate copolymer is 15%.

[0050] The solvent is compounded by water and an organic solvent at a volume ratio of 4:1, and ...

Embodiment 2

[0056] The difference between this embodiment and embodiment 1 is: a kind of ink that changes color when exposed to water and does not spread, including the following raw materials in parts by weight:

[0057] 60 parts of water-based film-forming resin

[0058] Strong acid and weak alkali metal salt 5 parts

[0059] Charged pH indicator 5 parts

[0060] Polymer adsorption resin 5 parts

[0061] 45 parts of solvent;

[0062] Wherein, the solvent is water or a mixture of water and an organic solvent.

[0063] The water-based film-forming resin is water-based polyurethane resin.

[0064] The metal ion of the strong acid and weak alkali metal salt is aluminum ion, specifically aluminum sulfate.

[0065] The charged pH indicator is bromophenol blue.

[0066] The polymer adsorption resin is polyvinyl alcohol.

[0067] The solvent is compounded from water and an organic solvent at a volume ratio of 6:1, and the organic solvent is ether.

Embodiment 3

[0069] The difference between this embodiment and Embodiment 1-2 is: an ink that changes color when exposed to water and does not spread, including the following raw materials in parts by weight:

[0070] 50 parts of water-based film-forming resin

[0071] Strong acid and weak alkali metal salt 3 parts

[0072] Charged pH indicator 2.5 parts

[0073] 4 parts of polymer adsorption resin

[0074] 35 parts of solvent;

[0075] Wherein, the solvent is water or a mixture of water and an organic solvent.

[0076] The water-based film-forming resin is water-based epoxy resin.

[0077] The metal ion of the strong acid and weak alkali metal salt is aluminum ion, specifically aluminum chloride and aluminum sulfate compounded according to the molar ratio of 1:1.

[0078] The charged pH indicator is compounded by bromophenol blue and bromothymol blue according to the mass ratio of 1:1.

[0079] The polymer adsorption resin is compounded by ethylene-vinyl acetate copolymer and polyvi...

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PUM

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Abstract

The invention relates to the technical field of printing ink and in particular to printing ink capable of discoloring when encountering water and being indiffusible as well as a preparation method andapplication of the printing ink. The printing ink capable of discoloring when encountering the water is prepared from the following raw materials including waterborne film-forming resin, strong-acidand weak-alkali metal salt, a pH indicator with charges, high molecular adsorption resin and a solvent; and the solvent is water or mixed liquid of the water and an organic solvent. In the raw materials of the printing ink, the pH indicator with the charges are chelated with the metal salt to form macromolecules with the charges, and then the macromolecules with the charges are adsorbed by the high molecular adsorption resin, so that although the water exists in the solvent, the pH indicator cannot lose efficacy. After printing, and the printing ink is subjected to temperature drying, a chelate of the pH indicator with the charges and the metal salt is combined with the waterborne film-forming resin, and the pH indicator is adsorbed to the surface of the high molecular resin; and after thehigh molecular adsorption resin absorbs moisture, a microstate acid-alkali value of a printing ink layer is shown to be a pH value of functional groups of the waterborne film-forming resin, and the pH indicator displays a color according to the pH value.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to an ink that changes color when exposed to water and does not diffuse, as well as its preparation method and application. Background technique [0002] One of the traditional water-changing inks is a pure organic solvent-based microcapsule system, but the organic solvent of this pure organic solvent-based microcapsule system ink is easy to volatilize, which will cause poor construction environment, pollute the environment, and is not conducive to environmental protection , will also cause certain harm to the user; another indicator that is sensitive to humidity will cause its own color to change when stored in a humid environment, resulting in the failure of the color change indicator, and its practical application is limited. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, one of the purposes of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/033C09D11/107C09D11/102C09D11/50
CPCC09D11/033C09D11/102C09D11/107C09D11/50
Inventor 齐新杰陈健
Owner 东莞市卡勒贸易有限公司
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