Composition for preparing water-based anti-corrosion ink, water-based anti-corrosion ink, preparation method and application thereof and demetallization method

A composition and water-based technology, which can be used in inks, applications, household appliances, etc., can solve problems such as corrosion of the protected aluminum layer, and achieve the effects of corrosion prevention, safe use, and high printing precision

Active Publication Date: 2021-05-28
ZHONGCHAO SPECIAL SECURITY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of ink, it is usually used to add white pigments and fillers, but the added white pigments and fillers are not conducive to the formation of a dense paint film for thin coatings, because the surface of the pigments and fillers has hydrophilic groups, and there is a gap between the pigments and fillers and the resin binder. The non-dense combination of acid and alkali provides penetration channels for corrosive ions such as acids and bases, further causing corrosion of the protected aluminum layer

Method used

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  • Composition for preparing water-based anti-corrosion ink, water-based anti-corrosion ink, preparation method and application thereof and demetallization method
  • Composition for preparing water-based anti-corrosion ink, water-based anti-corrosion ink, preparation method and application thereof and demetallization method
  • Composition for preparing water-based anti-corrosion ink, water-based anti-corrosion ink, preparation method and application thereof and demetallization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] According to a preferred embodiment of the present invention, the sum of the hydroxyl value and the acid value of the water-based resin is less than 50 mg KOH / g, and the weight average molecular weight is not less than 5000. Under this preferred embodiment, the prepared water-based anti-corrosion ink is more conducive to protecting the metal layer and has better corrosion resistance.

[0030] According to the present invention, preferably, the water-based resin is at least one selected from water-based polyurethane, water-based self-crosslinking polyacrylate, water-based epoxy emulsion and water-based polyester.

[0031] According to the present invention, preferably, the aqueous crosslinking agent is at least one selected from isocyanate compounds, oxazoline compounds, carbodiimide compounds and aqueous titanate chelates.

[0032] In the present invention, the water-based cross-linking agent can be selected in a wide range, preferably, the deblocking temperature of the...

Embodiment 1

[0061] Adopt the method provided by the invention to prepare water-based anticorrosion ink, concrete steps comprise:

[0062] (1) At room temperature, under stirring conditions, introduce the water-based dispersant into the solvent to obtain a uniform solution, introduce the filler and continue to stir for 0.5h, and after uniform grinding, the first solution is obtained;

[0063] (2) Under the condition of stirring, the water-based resin and the water-based crosslinking agent are introduced in sequence, and after continuous stirring for 0.5 h, the water-based anti-corrosion ink is obtained.

[0064] The types and dosages of compositions for preparing water-based anticorrosion inks are listed in Table 1.1.

[0065] Table 1.1

[0066]

[0067] Note: It has been determined that the sum of the hydroxyl value and acid value of the waterborne polyurethane is 15 mg KOH / g.

Embodiment 2

[0069] According to the method of Example 1, the difference is that the type and amount of the water-based anti-corrosion ink composition are different, and the specific type and amount of the composition are listed in Table 1.2.

[0070] Table 1.2

[0071]

[0072] Note: It has been determined that the sum of the hydroxyl value and acid value of the aqueous self-crosslinking polyacrylate is 35 mgKOH / g.

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Abstract

The invention relates to the field of water-based anti-corrosion ink, and discloses a composition for preparing water-based anti-corrosion ink, the composition comprises the following components in percentage by weight: 32 to 88 percent of water-based resin, 0.01 to 12 percent of water-based cross-linking agent, 0.01 to 20 percent of filler, 0 to 5 percent of water-based dispersing agent and 0.01 to 68 percent of solvent, wherein the sum of the hydroxyl value and the acid value of the water-based resin is less than 100 mg KOH/g, and the weight-average molecular weight is not less than 1000. The water-based anti-corrosion ink prepared from the composition is suitable for demetalization protection of a metallized anti-counterfeiting device, realizes chemical corrosion resistance protection of the metal layer, and has the advantages of high fineness of printed images and texts, strong anti-sticking property, strong acid and alkali resistance, good covering degree and strong adhesive force.

Description

technical field [0001] The invention relates to water-based anti-corrosion ink, in particular to a composition for preparing water-based anti-corrosion ink, a water-based anti-corrosion ink, a preparation method and application thereof, and a demetallization method for metal-plated anti-counterfeiting devices. Background technique [0002] Banknotes, securities and certificates have strong attribution attributes, are widely circulated in daily life, and are extremely authoritative. They are unique and special commodities. They can be combined with anti-counterfeiting materials, such as security thread, anti-counterfeiting wide strip, and anti-counterfeiting label to better maintain their authority and uniqueness. Most anti-counterfeiting materials require high-quality aluminum-coated reflective layers to improve the visual effects of optical anti-counterfeiting information such as holograms, dynamics, optical changes, and lenses, and to hide and shield machine-readable anti-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/102C09D11/03C09D11/107C09D11/104
CPCC09D11/102C09D11/03C09D11/107C09D11/104
Inventor 沈为之张义恒胡春华李妍
Owner ZHONGCHAO SPECIAL SECURITY TECH
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