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UV offset printing water-based varnish composition and preparation method thereof

An offset printing, water-based technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of coating embossing resistance and temperature resistance, low VOC emissions, environmental pollution, etc., and achieve no embossing Adhesion risk, low VOC, good adhesion effect

Active Publication Date: 2020-10-09
SHANGHAI WEIKAI CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

UV offset printing mainly includes two steps of coating varnish and printing offset printing ink through UV curing. Currently, offset varnish is divided into two systems: 1. Solvent-based coatings. This type of coating has the characteristics of good ink adhesion, but due to the solvent contained Corrosion and dissolution of the transfer coating on the base material will cause bottoming and pollution to the environment; 2. Water-based varnish, the solvent is mainly water and ethanol, and the VOC emission is low, which is one of the mainstreams of current development
Common water-based varnishes are generally soft due to the pursuit of adhesion with the ink, so the embossing and temperature resistance of the coating is not ideal, and it will appear blooming and whitening when it is rolled and stored

Method used

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  • UV offset printing water-based varnish composition and preparation method thereof
  • UV offset printing water-based varnish composition and preparation method thereof
  • UV offset printing water-based varnish composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Table 1

[0028] UV reactive monomer 1 polyurethane emulsion 20 Acrylic Emulsion 44 Ethanol: water = 3:1 34 slip agent 0.1 wax emulsion 1 D 0.2 Defoamer 0.2

[0029] The formula of the UV offset printing aqueous varnish composition of the present embodiment is as shown in table 1, and preparation method comprises the steps:

[0030] After mixing the acrylate emulsion, polyurethane emulsion and UV reactive monomer, add the solvent;

[0031] After mixing evenly, add slip agent, wax emulsion, wetting agent and defoamer, stir at 1100-1300 rpm, pass through a 250-mesh filter screen, and obtain a water-based varnish composition for UV offset printing.

Embodiment 2

[0033] Table 2

[0034]

[0035]

[0036] The formula of the water-based varnish composition for UV offset printing of this embodiment is shown in Table 2, and the preparation method is the same as that of Example 1.

Embodiment 3

[0038] table 3

[0039] UV reactive monomer 3 polyurethane emulsion 28.5 Acrylic Emulsion 34 Ethanol: water = 2:1 32.5 slip agent 0.1 wax emulsion 2 D 0.1 Defoamer 0.1

[0040] The formula of the water-based varnish composition for UV offset printing of this embodiment is shown in Table 3, and the preparation method is the same as that of Example 1.

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Abstract

The invention a waterborne varnish composition for UV offset printing and a preparation method thereof. The varnish comprises the following components: a UV reaction monomer, a polyurethane emulsion,an acrylic ester emulsion, a solvent, a slipping agent, a wax emulsion, a wetting agent, and an antifoaming agent. The preparation method of the waterborne varnish composition for UV offset printing comprises the following steps: the acrylic ester emulsion, the polyurethane emulsion and the UV reaction monomer are mixed, and the solvent is added; after uniform mixing, the slipping agent, the wax emulsion, the wetting agent and the antifoaming agent are added, stirring is carried out at a rotating speed of 1100-1300 rpm, filtering is carried out, and the waterborne varnish composition for UV offset printing is obtained. The composition has the following beneficial effects: 1. the environment-friendly type aqueous paint has few volatile organic compounds; 2. the coating and the UV ink are tightly combined with good adhesion; 3. the coating has high hardness, and does not have embossing adhesion risks during high temperature storage; 4. the coating has good film forming toughness, and coating does not fracture, when the coating is extruded or stretched, after the printing ink is coated.

Description

technical field [0001] The invention relates to a water-based varnish composition for UV offset printing and a preparation method thereof, belonging to the technical field of UV curing coatings. Background technique [0002] UV offset printing has the advantages of smooth printing surface, good texture, bright colors and high saturation after printing. In addition, inks for UV offset printing have the characteristics of fast drying, good wear resistance, no solvent and no emission, so they are widely used in tobacco packaging, wine, etc. Pharmaceutical and pharmaceutical packaging as well as food packaging. UV offset printing mainly includes two steps of coating varnish and printing offset printing ink through UV curing. At present, offset varnish is divided into two major systems: 1. Solvent-based coatings. This type of coating has the characteristics of good ink adhesion, but due to the solvent contained Corrosion and dissolution of the transfer coating on the base materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D175/04C09D7/65
CPCC09D133/04C08L75/04
Inventor 董海普刘冲戴胜杰
Owner SHANGHAI WEIKAI CHEM
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