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Water-based ink, and preparation method and safe product thereof

A water-based ink and security product technology, applied in the printing field, can solve the problems of slow drying, poor adhesion of polymer substrates, and restrictions on the application of water-based inks, and achieve good printing suitability, improve color saturation and anti-counterfeiting level Effect

Active Publication Date: 2013-10-02
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based inks also have some inherent defects, mainly in: poor adhesion to polymer substrates, slow drying, etc. These defects also restrict the application of water-based inks in micro-pattern printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the formula in Table 1, the blue pigment preparation (produced by Basf company, trade name: Microlith4G-WA) modified by acrylic acid resin, the acrylic acid-acrylic acid ester copolymer and pure water of 3.5% by weight are mixed at 1000-1500 After mixing and stirring at a speed of rpm for 30 minutes, pretreatment with diethanolamine, and then grinding to make a color paste with a particle size of ≤250nm, wherein the pH of the color paste is controlled within the range of 8-8.5;

[0033] Add styrene-acrylic emulsion, self-crosslinking acrylic emulsion, remaining acrylic acid-acrylate copolymer, non-silicon polymer defoamer, and silicone substrate wetting agent to the above-mentioned color paste according to the formula in Table 1, and stir for 50 minutes , made into premixed ink;

[0034] Add associative polyurethane to the premixed ink prepared above, and stir for 40 minutes to make a finished water-based ink with a particle size of ≤300nm. After testing, t...

Embodiment 2

[0043] According to the formula in Table 2, the magenta pigment (produced by Clariant Company, trade name: Ink Jet Magenta E5B02), 2.8% polyacrylic acid by weight and pure water were mixed and stirred for 30 minutes at a speed of 1000-1500 rpm Finally, grind to make a color paste with a particle size of ≤250nm;

[0044] Add styrene-acrylic emulsion, self-crosslinking acrylic emulsion, remaining polyacrylic acid, polyether-modified polydimethylsiloxane, and sulfonate substrate wetting agent to the above-mentioned color paste according to the formula in Table 2, and stir 50 minutes to make pre-mixed ink;

[0045] Add associative polyurethane to the premixed ink prepared above, and stir for 40 minutes to make a finished water-based ink with a particle size of ≤300nm. After testing, the viscosity of the water-based ink at 25°C is 180mPa·s.

[0046] The formula of table 2 magenta water-based ink

[0047] components

Embodiment 3

[0049] According to the formula in Table 3, the brown pigment preparation (produced by Basf Company, trade name: Microlith Brown-WA) modified by acrylic resin, 1.4% by weight of maleic acid-acrylic acid copolymer and pure water were mixed at 1000- After mixing and stirring for 30 minutes at a speed of 1500 rpm, pretreatment with aminomethylpropanol, and then grinding to make a color paste with a particle size of ≤250nm, wherein the pH of the color paste is controlled within the range of 8-8.5 ;

[0050] Add styrene-acrylic emulsion, self-crosslinking acrylic emulsion, remaining maleic acid-acrylic acid copolymer, polydimethylsiloxane, and silicone substrate wetting agent to the above-mentioned color paste according to the formula in Table 3, and stir 50 minutes to make pre-mixed ink;

[0051] Add associative polyurethane to the premixed ink prepared above, and stir for 40 minutes to make a finished water-based ink with a particle size of ≤300nm. After testing, the viscosity o...

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Abstract

The invention provides a water-based ink, and a preparation method and a safe product thereof. The particle size of the water-based ink is less than or equal to 300nm. The water-based ink comprises the following components in percentage by weight: 15-25% of colorant, 60-80% of pure water, 3-15% of water-based resin emulsion, 1-5% of polymer dispersant, 0.1-0.5% of defoaming agent, 0.1-3% of substrate wetting agent and 0.1-1% of associated polyurethane thickener. The invention also provides a preparation method and a safe product of the water-based ink. The water-based ink is prepared by selecting and matching the water-based resin system, colorant and related adjuvants. The ink can have favorable adhesive force and dryness in micrpattern printing, especially can satisfy the requirements for micrpattern array printing in microlens array optical anti-counterfeiting elements, and achieves the effect of enhancing the color saturation and anti-counterfeiting level of the printed pattern printing products.

Description

technical field [0001] The invention relates to a water-based ink, a preparation method thereof and a safety product, belonging to the technical field of printing. Background technique [0002] Micro-lens array optical anti-counterfeiting element (also known as micro-optical security system) is an advanced anti-counterfeiting technology that has emerged in recent years. Because this technology can produce obvious visual dynamic effects, and is easy to be identified and extremely difficult to imitate, it is regarded as Important public anti-counterfeiting features of banknotes and special tickets. The micro-lens array optical anti-counterfeiting element is composed of micro-lens array and micro-pattern array. The micro-lens array can enlarge the micro-pattern array and produce dynamic effects. Wherein, the micro-pattern molding layer is made of polymer material, and the concave micro-pattern is formed by embossing patterns on the micro-pattern array molding layer by using a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10
Inventor 周树荣高瑞吕建英曹瑜李新宇魏智韬
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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