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A kind of water-based ink and preparation method thereof

A technology of water-based ink and water-based wax, which is applied in the direction of ink, household utensils, applications, etc., can solve the problems of printing quality degradation, easy delamination of ink, and affecting ink quality

Active Publication Date: 2015-08-05
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of water-based ink also needs to be pre-dispersed by a sand mill. A certain amount of resin often needs to be added to the ingredients before pre-dispersion, which is conducive to the dispersion of the color paste. However, the resin is prone to demulsification after multi-stage grinding. Phenomenon, resulting in the final formed ink is prone to delamination, which seriously affects the quality of the ink
Some people also consider not adding resin in the grinding stage, so that the ink paste prepared in this way is unevenly dispersed, resulting in a decrease in printing quality
[0006] Traditional ink preparation often uses a single resin, and the same resin is used in the grinding pre-dispersion stage and the high-speed emulsification stage. Such inks often only show the advantages of one aspect, but it is often difficult for a single resin ink to meet multiple processes and functions. needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Put isopropanol, surfactant and water into the reaction kettle, stir evenly, heat, and pass nitrogen after the temperature rises to 70°C; then put butyl acrylate, isooctyl acrylate, styrene, methyl acrylate and / or methyl methacrylate, acrylic acid and / or methacrylic acid and an appropriate amount of initiator, slowly drop into the three-necked bottle, control the reaction temperature not higher than 100 ° C, control the dropwise addition of the mixture within 3 hours, keep the temperature after the dropwise addition Stop heating after 1-2 hours, and after the temperature is cooled below 50°C, slowly pour the mixture of NaOH aqueous solution and ammonia water into the reaction kettle, stir for 0.5 hours, and measure the pH value to be 8, and discharge after cooling to obtain the product.

[0033] Formula 1: 8 parts of butyl acrylate, 8 parts of isooctyl acrylate, 20 parts of styrene, 10 parts of methyl methacrylate, 2 parts of acrylic acid, 1 part of surfactant, 0.3 p...

Embodiment 2

[0036] Accurately weigh 22 kilograms of embodiment 1 formula 1 made grinding resin, 12 kilograms of iron oxide yellow, and 5 kilograms of light calcium carbonate are put into container, then add 5 kilograms of water: ethanol is the mixed solution of 1:1, in Stir at a high speed for 1 hour at a speed of 1000 rpm to form an ink solid mixture;

[0037] Add the previous ink solid mixture into a sand mill for grinding, repeat the grinding twice to form ink color paste, and put it into an emulsifier;

[0038] Add 0.2 kg of Tween-80, 0.3 kg of polyether-modified polydimethylsiloxane and 0.5 kg of sodium lauryl sulfate to the ink color paste, and stir well;

[0039] Mix 4 kilograms of acrylic acid-modified waterborne polyurethanes and the resin that the embodiment 1 formula 2 of 36 kilograms makes, forms emulsified resin;

[0040] Put 40 kg of emulsified resin, 10 kg of polyethylene water-based wax emulsion and 5 kg of water: ethanol as a 1:1 mixed solution into an emulsifier with in...

Embodiment 3

[0043] Accurately weigh 30 kilograms of embodiment 1 formula 1 made grinding resin, 12 kilograms of iron oxide red, 8 kilograms of light calcium carbonate and put into container, then add 8 kilograms of water: ethanol is the mixed solution of 1:1, in Stir at a high speed of 900 rpm for 40 minutes to form a solid ink mixture;

[0044] Add the previous ink solid mixture into a sand mill for grinding, repeat the grinding twice to form ink color paste, and put it into an emulsifier;

[0045] Add 0.5 kg of Tween-80, 0.75 kg of polyether-modified polydimethylsiloxane and 0.75 kg of sodium lauryl sulfate to the ink color paste, and stir well;

[0046] Mix the resin that 2 kilograms of acrylic acid-modified water-based polyurethanes and 18 kilograms of embodiment 1 formula 2 make, form emulsified resin;

[0047] Put 20 kilograms of emulsifying resin, 14 kilograms of polyethylene water-based wax emulsion and 6 kilograms of water: ethanol as a 1:1 mixed solution into an emulsifier with...

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PUM

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Abstract

The invention discloses waterborne ink and a preparation method thereof. The waterborne ink comprises milled resin, emulsion resin, a dispersant, a leveling agent, an antifoaming agent, a colorant, filler, a mixed alcohol-water solution and waterborne wax. The preparation method comprises the steps of wetting milled resin, colorant and filler with a part of the mixed alcohol-water solution, and milling into ink color paste; then adding the antifoaming agent, the leveling agent and the dispersant, and stirring uniformly; then adding the emulsion resin, waterborne wax and the remainder of the mixed alcohol-water solution into the ink color paste, stirring at high speed, emulsifying and filtering to obtain the waterborne ink. The preparation method is simple and low in cost, the obtained waterborne ink has the advantages of long storage time and no demulsification, layering and bonding phenomenon, and the wear resistance of the articles printed by the waterborne ink is improved and the application security of the ink is increased.

Description

technical field [0001] The invention relates to a water-based ink and a preparation method thereof, belonging to the field of inks. Background technique [0002] The composition of water-based inks, especially printing inks, mainly includes: binders (polymerizable prepolymers), pigments, water and other additives. It is characterized by the use of water-based resin as the link material, which is mainly divided into two types: water-diluted and water-dispersed. There are many types of resins that can be used in the former, such as maleic acid resin, shellac, maleic acid resin modified shellac, urethane, water-soluble acrylic resin and water-based amino resin. The water-dispersed type of vehicle is obtained by polymerizing emulsified monomers in water. It is a two-phase system, in which the oil phase is dispersed in the water phase in the form of particles. Although it cannot be dissolved by water, it can be diluted by water, so it is also It can be considered as an oil-in-w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/106C09D11/102
Inventor 任建新刘姜瑾王謇韩星罗嘉练文柳银董红
Owner CHINA TOBACCO HUNAN INDAL CORP