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Low-yellowing UV varnish

A low-yellow, formula-based technology, applied in the field of UV varnish, to achieve good economic and social benefits

Inactive Publication Date: 2009-08-19
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

However, the yellowing tendency of UV varnishes is an important disadvantage compared to conventional paints

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix and dissolve all raw materials evenly according to the following component formula:

[0027] HDDA 20

[0028] DPHA 15

[0029] Tetrafunctional aliphatic PUA 30

[0030] Trifunctional Aliphatic PUA 30

[0031] Epoxy Acrylate 20

[0032] Irgacure184 4

[0033] EFKA3777 or EFKA3034 0.2

[0034] OB 0.1

[0035] Butyl acetate 25

[0036] Isopropanol 25

[0037] Then spray it on the plastic substrate, using 1KW high-pressure mercury lamp with 80W.cm -1 The illuminance of ultraviolet light is irradiated and cured, and then the color difference of the substrate before and after spraying is compared with a color difference meter. The obtained results are: ΔL=-0.687; Δa=-0.113; Δb=0.108; ΔE=0.705. Then its coating film was tested for hardness and adhesion, and the results showed that the pencil hardness was 1H and there was no mark, and none of the hundred grids peeled off separately.

Embodiment 2

[0039] Mix and dissolve all raw materials evenly according to the following component formula:

[0040] HDDA 20

[0041] DPHA 20

[0042] Tetrafunctional aliphatic PUA 30

[0043] Trifunctional Aliphatic PUA 25

[0044] Epoxy Acrylate 20

[0045] Irgacure184 4

[0046] EFKA3777 or EFKA3034 0.2

[0047] OB 0.1

[0048] Butyl acetate 25

[0049] Isopropanol 25

[0050] Then spray it on the plastic substrate, using 1KW high-pressure mercury lamp with 80W.cm -1 The illuminance of ultraviolet light is irradiated and cured, and then the color difference of the substrate before and after spraying is compared with a color difference meter. The obtained results are: ΔL=-0.669; Δa=-0.107; Δb=0.103; ΔE=0.685. Then its coating film was tested for hardness and adhesion, and the results showed that the pencil hardness was 1H and there was no mark, and none of the hundred grids peeled off separately.

Embodiment 3

[0052] Mix and dissolve all raw materials evenly according to the following component formula:

[0053] HDDA 20

[0054] DPHA 20

[0055] Tetrafunctional aliphatic PUA 30

[0056] Trifunctional Aliphatic PUA 20

[0057] Epoxy Acrylate 20

[0058] Irgacure184 4

[0059] EFKA3777 or EFKA3034 0.2

[0060] OB 0.1

[0061] Butyl acetate 25

[0062] Isopropanol 25

[0063] Then spray it on the plastic substrate, using 1KW high-pressure mercury lamp with 80W.cm -1 The illuminance of ultraviolet light is irradiated and cured, and then the color difference of the substrate before and after spraying is compared with a color difference meter. The obtained results are: ΔL=-0.695; Δa=-0.133; Δb=0.115; ΔE=0.717. Then its coating film was tested for hardness and adhesion, and the results showed that the pencil hardness was 1H and there was no mark, and none of the hundred grids peeled off separately.

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PUM

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Abstract

The invention provides a low-yellowing UV varnish, which mainly includes: monomers, photosensitive resins, photoinitiators, auxiliary agents, fluorescent whitening agents and solvents, and the content of each component is calculated as: monomer 35~55; photosensitive resin 55~90; photoinitiator 4~7; auxiliary agent 0.1~0.3; fluorescent whitening agent 0.05~0.5; solvent 50~80. The UV varnish is mainly used for coating plastic substrates, solves the yellowing problem existing in general UV varnishes, and has good economic and social benefits.

Description

technical field [0001] The invention relates to a UV coating, in particular to a UV varnish. 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 assistant. 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. This curing method gives UV coatings many advantages: fast curing and glazing speed, energy saving, room temperature curing, superior performance and environmental protection, the film has high brightness, the film surface is firm and heat-resistant after drying, and can make the surface of the substrate bright , smooth and good refraction effect. Therefore, in view ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/06
Inventor 邓燕马迎娜袁春来
Owner MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY