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UV lacquer

A varnish and acrylate technology, applied in the field of UV varnish, can solve the problems of uniform high hardness and low yellowing, low hardness and large yellowing of UV varnish, achieve low comprehensive performance, solve yellowing and strong adhesion. Effect

Inactive Publication Date: 2008-05-07
MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, UV varnishes for plastic substrates on the market have some obvious defects, such as low hardness, yellowing caused by ultraviolet light irradiation, etc.
Resins with high variable density often cause large yellowing, which makes it difficult for UV varnishes to unify high hardness and low yellowing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take the following reagents according to the formula:

[0039] Difunctional acrylate monomer 25;

[0040] Hexafunctional acrylate monomer 15;

[0041] Low yellowing aliphatic polyurethane acrylic resin 55;

[0042] Glyoxylate mixture photoinitiator 4.5;

[0043] BYK333 0.15;

[0044] Toluene 10;

[0045] Butyl acetate 7;

[0046] Isopropanol 3.

[0047] Mix and dissolve the above-mentioned reagents uniformly according to the conventional method to prepare the UV varnish described in the present invention, then wipe the plastic plate with alcohol and spray it, and place the sprayed plastic plate for a few minutes to make the varnish level naturally, and put Bake in an oven at a temperature of 60°C for 2 to 3 minutes, and finally use a UV oven for UV curing.

[0048] Then the color difference test was carried out, and the color difference of the plastic plate before and after spraying was compared by a color difference meter. The obtained results were: ΔL=-0.30; Δa...

Embodiment 2

[0050] Take the following reagents according to the formula:

[0051] Difunctional acrylate monomer 20;

[0052] Hexafunctional acrylate monomer 10;

[0053] Low yellowing aliphatic polyurethane acrylic resin 55;

[0054] Glyoxylate Mixture Photoinitiator 4.0;

[0055] BYK333 0.15;

[0056] Toluene 10;

[0057] Butyl acetate 7;

[0058] Isopropanol 3.

[0059] Mix and dissolve the above-mentioned reagents uniformly according to the conventional method to prepare the UV varnish described in the present invention, then wipe the plastic plate with alcohol and spray it, and place the sprayed plastic plate for a few minutes to make the varnish level naturally, and put Bake in an oven at a temperature of 60°C for 2 to 3 minutes, and finally use a UV oven for UV curing.

[0060] Then, the color difference test was carried out, and the color difference of the plastic plate before and after spraying was compared by a color difference meter. The obtained results were: ΔL=-0.25; Δ...

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PUM

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Abstract

The invention discloses a low yellowing UV varnish for the coating of black plastic substrates, comprising a plurality of components in weight percentage: bi-functional acrylate monomer 20 to 30 percent, hexa-functional acrylate monomer 10 to 20 percent, low yellowing aliphatic polyurethane acrylate 45 to 65 percent, glyoxylate mixture photoinitiators 2.5 to 5, promoter 0.1 to 0.4 percent, and solvent 20 to 50 percent; wherein, the promoter is BYK333 and the solvent is also formed by toluene, butyl and isopropanol. By matching low yellowing resins with reactive diluents, and adopting glyoxylate mixture photoinitiators, the invention has the advantages of low yellowing and excellent comprehensive performance.

Description

technical field [0001] The invention relates to a coating, in particular to a UV varnish for coating plastic substrates. Background technique [0002] UV coating is a coating that is hardened by chemical action caused by ultraviolet radiation. Its main components are composed of photosensitive resin, reactive diluent, photoinitiator and additives. The coating uses high-energy ultraviolet light as a curing energy source. The photoinitiator absorbs ultraviolet light energy to form free radicals, triggers photosensitive resin and reactive diluent molecules, and then undergoes chain polymerization reaction, so that the coating film is cured. [0003] UV coatings have the advantages of fast curing speed, energy saving, room temperature curing, superior performance, and environmental protection. The coating speed is fast, the film layer has high brightness, and the film surface is firm and heat-resistant after drying, which can make the surface of the substrate very bright and smo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D4/00C09D5/00
Inventor 邓燕
Owner MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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