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Rapid curing coating applicable to UV-LED (Ultraviolet-Light-Emitting Diode) light source and preparation method thereof

A UV-LED, fast curing technology, applied in coating and other directions, can solve the problems of short use time of high-pressure mercury lamps, low energy efficiency of high-pressure mercury lamps, deformation of substrates, etc., to achieve broad market application prospects, good chemical resistance The effect of high stability and high mechanical strength

Active Publication Date: 2012-07-04
东莞隽思印刷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although photocuring has so many advantages, since the current photocuring coatings use high-pressure mercury lamps or metal halide lamps, these traditional UV lamps also have many shortcomings and deficiencies.
The energy efficiency of the high-pressure mercury lamp is low. Due to the short curing time, the input power of the ultraviolet bulb is large, and the output power of the ultraviolet light is small, so a large amount of heat energy is lost.
Generally, in the power of ultraviolet light bulbs, only 20% of the power is converted into ultraviolet rays, visible light accounts for 10%, and infrared rays and heat energy account for 70%. The temperature of the tube wall of a general mercury lamp can reach about 600°C; The printing of printing materials with poor heat resistance and the thermal influence of the printing machine will often cause deformation and damage to the substrate; the high-pressure mercury lamp has a short service time, generally 2000-3000 hours at most, and the amount of ultraviolet rays will increase when it is close to the later stage. Reduced by 15-20%, so the reflector needs to be cleaned regularly, and the equipment needs to be replaced and maintained frequently, which increases the cost of use; the ozone generated by the high-pressure mercury lamp will corrode the surrounding equipment, and the ozone will also have a negative impact on the human respiratory system , and the high-pressure mercury lamp contains mercury, which will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 A coating that can be used for UV-LED light source curing, its components and their weight percentages are: mercapto-modified polyurethane acrylic resin 43%, dipropylene glycol diacrylate 22%, polyurethane acrylic resin 30% , 2,4,6-trimethylbenzyl diphenylphosphine oxide 4.5%, polyether modified polysiloxane 0.15%, acrylate leveling agent 0.35%.

[0023] A kind of preparation method that can be used for the coating of UV-LED light source curing: this preparation method that can be used for the coating of UV-LED light source curing is characterized in that following steps are arranged successively: avoid sunlight or ultraviolet light irradiation, air relative humidity is less than Under the condition of 70%, slowly add 43% mercapto-modified polyurethane acrylic resin, 10% polyurethane acrylic resin, 42% dipropylene glycol diacrylate, 4.5% 2,4,6-trimethylbenzene First base diphenyl phosphine oxide, 0.15% polyether modified polysiloxane, 0.35% acrylate leveling a...

Embodiment 2

[0024] Embodiment 2 A coating that can be used for UV-LED light source curing, its components and their weight percentages are respectively: 30% of mercapto-modified polyurethane acrylic resin, 20% of dipropylene glycol diacrylate, and 25% of polyurethane acrylic resin , Titanium dioxide 20%, 2,4,6-trimethylbenzyl diphenylphosphine oxide 4.5%, polyether modified polysiloxane 0.15%, acrylate leveling agent 0.35%.

[0025] The preparation method of this coating that can be used for UV-LED light source curing is characterized in that it has the following steps in sequence: under the condition of avoiding sunlight or ultraviolet light irradiation and the relative air humidity is less than 70%, slowly modify 30% of the mercapto groups sequentially. Polyurethane acrylic resin, 20% dipropylene glycol diacrylate, 25% polyurethane acrylic resin, 20% titanium dioxide, 4.5% 2,4,6-trimethylbenzyl diphenylphosphine oxide, 0.15 % polyether modified polysiloxane, 0.35% acrylate leveling agen...

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PUM

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Abstract

The invention discloses a rapid curing coating applicable to a UV-LED (Ultraviolet-Light-Emitting Diode) light source. The coating comprises the following components in percentage by weight: 4-10 percent of a photoinitiator, 20-60 percent of a special oligopolymer, 10-50 percent of an active diluent, 6-12 percent of a promoter, 0.1-2 percent of an aid and 0-30 percent of a pigment. The rapid curing coating applicable to the UV-LED light source can be prepared by slowly stirring and mixing the components uniformly in sequence under the condition that sunlight or ultraviolet light irradiation is avoided and the relative air humidity is less than 70 percent, and keeping the temperature of a mixture below 50 DEG C in a stirring process. The rapid curing coating can be cured rapidly under low UV light intensity and energy, and has the characteristics of high luster, high adhesion and high wear resistance; the production efficiency of UV-LED photo-curing is increased to a great degree; and a highly-environmentally-friendly and highly-energy-saving UV-LED photo-curing technology is applied widely.

Description

technical field [0001] The invention relates to a coating that can be used for fast curing of UV-LED light sources, in particular to a photocurable coating that can be used for printing. Background technique [0002] At present, the UV light curing process used in the printing industry mainly uses high-pressure mercury lamps and metal halide lamps as light sources and then mixes curable coatings. Its disadvantages are large power consumption and high heat generation, which will cause damage to printing presses and substrates, and ozone will be generated during use. Emphasizing environmental protection is a common trend of social development. In the United States, Germany, Japan, Italy and many other countries, legislation has been passed to restrict the use of traditional coatings with high VOC (volatile organic compound) emissions, and gradually replace traditional coatings with environmentally friendly new materials such as UV coatings. product. On the other hand, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D7/12
Inventor 袁伟雄
Owner 东莞隽思印刷有限公司
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