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Reversible thermochromic microcapsule pigment preparation method

A thermochromic and microcapsule technology, applied in the directions of microcapsule preparation, microsphere preparation, color-changing fluorescent materials, etc., can solve the problems of high discoloration temperature and low discoloration sensitivity of thermochromic materials, and achieve the effect of improving the coating rate

Inactive Publication Date: 2015-12-23
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing reversible thermochromic microcapsule pigments, which solves the problems of low discoloration sensitivity and high discoloration temperature of thermochromic materials prepared by existing preparation methods

Method used

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  • Reversible thermochromic microcapsule pigment preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034]Weigh by mass percentage: 0.1% crystal violet lactone, 0.5% bisphenol A, 3.61% cetyl alcohol; 4% melamine, 4.2% formaldehyde solution with a mass concentration of 37%, 0.48% sodium dodecylbenzenesulfonate %, sodium lauryl sulfate at 0.11%, distilled water at 87%, the total content of the above components is 100%; heat the weighed cetyl alcohol until it is completely melted, then add the weighed bisphenol A and continue heating Until it melts, add crystal violet lactone and keep stirring, control the temperature at 60°C until it becomes a transparent liquid, and after natural cooling, a dark blue solid is obtained, which is compound A; mix 80% of the total amount of distilled water weighed, Sodium dodecylbenzenesulfonate and sodium dodecyl sulfate are mixed, and the glass rod is constantly stirred to make it fully emulsified. The emulsification stirring rate is 200r / min; then poured into a three-neck round bottom flask for water bath reaction, the water bath reaction time ...

Embodiment 2

[0036] Weigh by mass percentage: 0.08% crystal violet lactone, 0.4% bisphenol A, 3% cetyl alcohol; 2% melamine, 4.03% formaldehyde solution with a mass concentration of 37%, 0.4% sodium dodecylbenzenesulfonate %, sodium lauryl sulfate at 0.09%, distilled water at 90%, the total content of the above components is 100%; heat the weighed cetyl alcohol until it is completely melted, then add the weighed bisphenol A and continue heating Until it melts, add crystal violet lactone and keep stirring, control the temperature at 63°C until it becomes a transparent liquid, and after natural cooling, a dark blue solid is obtained, which is compound A; mix 80% of the total amount of distilled water weighed, Sodium dodecylbenzenesulfonate and sodium dodecyl sulfate are mixed, and the glass rod is constantly stirred to make it fully emulsified. The emulsification stirring rate is 220r / min; then poured into a three-neck round bottom flask for water bath reaction, the water bath reaction time i...

Embodiment 3

[0038] Weighing by mass percentage: 0.09% crystal violet lactone, 0.45% bisphenol A, 3% cetyl alcohol; 2.76% melamine, 5% formaldehyde solution with a mass concentration of 37%, 0.6 sodium dodecylbenzenesulfonate %, sodium lauryl sulfate at 0.1%, distilled water at 88%, the total content of the above components is 100%; heat the weighed cetyl alcohol until it is completely melted, then add the weighed bisphenol A and continue heating Until it melts, add crystal violet lactone and keep stirring, control the temperature at 67°C until it becomes a transparent liquid, and after natural cooling, a dark blue solid is obtained, which is compound A; mix 80% of the total amount of distilled water weighed, Sodium dodecylbenzenesulfonate and sodium dodecyl sulfate are mixed, and the glass rod is constantly stirred to make it fully emulsified. The emulsification stirring rate is 240r / min; The reaction temperature was 68°C to obtain emulsion A; then the obtained compound A was heated and m...

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Abstract

The present invention discloses a reversible thermochromic microcapsule pigment preparation method, which comprises: weighing 0.08-0.1% by mass of crystal violet lactone, 0.4-0.5% by mass of bisphenol A, 3-6% by mass of hexadecanol, 2-4% by mass of melamine, 4.03-5% by mass of a formaldehyde solution, 0.4-0.6% by mass of sodium dodecyl benzene sulfonate, 0.09-0.11% by mass of sodium dodecyl sulfate ammonium, and 87-90% by mass of distilled water, preparing a complex A, preparing an O / W type emulsion and a melamine-formaldehyde pre-polymerization liquid, and carrying out a condensation polymerization reaction to prepare the pigment. According to the present invention, advantages of high color change sensitivity, low color change temperature and good color change stability are provided when the prepared monomer thermochromic material is adopted as the pigment, and the prepared reversible thermochromic microcapsule pigment can be widely used in the fields of anti-counterfeiting inks, temperature showing materials, and the like.

Description

technical field [0001] The invention belongs to the technical field of printing ink material preparation, and relates to a preparation method of a reversible thermochromic microcapsule pigment. Background technique [0002] Thermochromic ink is a branch of anti-counterfeiting ink, and its biggest advantage is that it does not require auxiliary equipment to display color changes and temperature changes. The core of thermochromic ink is that its components contain pigments with thermochromic properties, so the ink is prepared on the basis of thermochromic materials. From the perspective of thermodynamics, thermochromic materials can be divided into two types: reversible discoloration and irreversible discoloration; from the perspective of discoloration temperature, they can be divided into low temperature type, medium temperature type and high temperature type; from the perspective of discoloration times, they can be divided into single color type and multicolor type. From th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09B67/20C09K9/02
Inventor 曹从军李萍王静
Owner XIAN UNIV OF TECH
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