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Microencapsulated environment-friendly water-based ink for printing and preparation method

A water-based ink and microcapsule technology, applied in the field of printing, can solve problems such as poor coating tinting strength, and achieve the effects of uniform and stable color, good effect and simple preparation steps.

Inactive Publication Date: 2018-05-29
上海喜颜化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the poor coloring power of the coating of the hydrophilic group in the water-based ink, which directly affects the defects of the printed product, the present invention proposes a microcapsule-type environmentally friendly water-based ink for printing and a preparation method, which is made of nanocrystalline cellulose The microcapsules make it well dispersed in the ink, and through the good mechanical properties of nanocrystalline cellulose, it makes it better in terms of pigment retention and printing retention, and improves the ink's bonding performance

Method used

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  • Microencapsulated environment-friendly water-based ink for printing and preparation method

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Experimental program
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Embodiment 1

[0033] (1) Take nanocrystalline cellulose and polyether modified silicone binder with a mass ratio of 5:1, wherein the nanocrystalline cellulose has a length of 400nm and a diameter of 20nm. In the ether-modified siloxane, ultrasonically disperse and mix evenly, the ultrasonic power is controlled at 10kW, the stirring frequency is 1400 rpm, and the temperature is controlled at 50°C to obtain nanocrystalline cellulose with polyether-modified siloxane attached to the surface;

[0034] (2) Use urea with a mass ratio of 1:1 and 37% formaldehyde aqueous solution, adjust the pH value to 11, and react at about 95°C for 1 hour to obtain a linear urea-formaldehyde resin oligomerization solution;

[0035](3) adding the nanocrystalline cellulose with polyether-modified siloxane attached to the surface to the linear urea-formaldehyde oligomer solution at a mass ratio of 25:1, and ultrasonically dispersing to obtain water-soluble ink capsules;

[0036] (4) Heat 23 parts of the ink capsule,...

Embodiment 2

[0039] (1) Take nanocrystalline cellulose and polyether modified silicone binder with a mass ratio of 8:1, wherein the nanocrystalline cellulose has a length of 400nm, a diameter of 4nm, and an aspect ratio of 100:1. Add crystalline cellulose as a capsule core to polyether-modified siloxane, ultrasonically disperse and mix evenly, control the ultrasonic power at 7kW, stir at 1020 rpm, and control the temperature at 45°C to obtain surface-attached polyether-modified siloxane alkane nanocrystalline cellulose;

[0040] (2) Use urea with a mass ratio of 1:1.5 and 37% formaldehyde aqueous solution, adjust the pH value to 9, and react at about 92°C for 1 hour to obtain a linear urea-formaldehyde resin oligomerization solution;

[0041] (3) adding the nanocrystalline cellulose with polyether-modified siloxane attached to the surface to the linear urea-formaldehyde oligomer solution at a mass ratio of 15:1, and ultrasonically dispersing to obtain water-soluble ink capsules;

[0042] ...

Embodiment 3

[0044] (1) Take nanocrystalline cellulose and polyether modified silicone binder with a mass ratio of 9:1, wherein the nanocrystalline cellulose has a length of 400nm, a diameter of 10nm, and an aspect ratio of 40:1. Crystalline cellulose is added to polyether-modified siloxane as a capsule core, ultrasonically dispersed and mixed evenly, the ultrasonic power is controlled at 5kW, the stirring frequency is 1200 rpm, and the temperature is controlled at 45°C to obtain surface-attached polyether-modified siloxane. alkane nanocrystalline cellulose;

[0045] (2) Use urea with a mass ratio of 1:2 and 37% formaldehyde aqueous solution, adjust the pH value to 10, and react at about 90°C for 1.5 hours to obtain a linear urea-formaldehyde resin oligomerization solution;

[0046] (3) adding the nanocrystalline cellulose with polyether-modified siloxane attached to the surface to the linear urea-formaldehyde oligomer solution at a mass ratio of 20:1, and ultrasonically dispersing to obta...

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Abstract

The invention discloses microencapsulated environment-friendly water-based ink for printing and a preparation method. The preparation method comprises the following steps: taking nano-crystalline cellulose as a core material, and taking urea and formaldehyde as wall materials; then connecting the core material with the wall materials through polyether modified siloxane to form a printing microcapsule; then uniformly mixing the printing microcapsule with acrylic hydroxyl emulsion, a solvent-free polyurethane thickener, isopropanol, a dispersing agent, polyethylene wax and the like, thus obtaining the microencapsulated ink. The ink capsule prepared by synthesizing nanocrystalline cellulose capsule core, urea resin capsule wall and a polyether modified siloxane adhesive, disclosed by the invention, has good dispersion in the ink; the defect that a coating prepared by an existing method has poor coloring strength so as to directly influence use experience of a printing product is overcome;the microencapsulated environment-friendly water-based ink for printing has the advantages of better retention of pigment, better printing retention and capability of improving the adhesion of the printing ink; the obtained printing ink has the advantages of good film-forming effects, stable and uniform color and durability.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a microcapsule-type environment-friendly water-based ink for printing and a preparation method thereof. Background technique [0002] Water-based ink is referred to as ink for short, and flexographic water-based ink is also called liquid ink, which is a uniform paste-like substance composed of binders, pigments, additives and other substances. Water-based has the advantages of good color expression, good adhesion, oil resistance, etc., and has wide applicability to various substrate materials. Since water is used as a dissolution carrier, water-based ink is safe, non-toxic, non-flammable, non-explosive, and has almost no volatile organic gases, which are environmentally friendly and safe. [0003] Compared with solvent-based inks, water-based inks have the following advantages: 1. Solvent-based inks will emit a large amount of low-concentration VOCs. Since water-based inks use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/14C09D11/107C09D11/103C09D11/03B01J13/08B01J13/02
Inventor 陈庆司文彬
Owner 上海喜颜化工科技有限公司
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