Ultraviolet-infrared double curing varnish coating and preparation method thereof

A dual-curing varnish, dual-curing technology, used in coatings, devices for coating liquids on surfaces, pre-treatment surfaces, etc., can solve the limitations of UV curing technology application and promotion, yellowing of protruding parts, large residual stress, etc. To improve long-term weather resistance and insufficient curing, reduce the content of residual photoinitiator and unreacted double bonds, and improve the conversion rate of double bonds
CN102321399BActive Publication Date: 2013-10-23广东四方威凯新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
广东四方威凯新材料有限公司
Publication Date
2013-10-23

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Abstract

The invention discloses an ultraviolet-infrared double curing varnish coating and a preparation method thereof. The varnish coating is prepared from UR-1 double curing varnish, a curing agent and a diluent in a mass ratio of (3-8):1:1. The curing process comprises an infrared preheating stage, an ultraviolet curing stage and an infrared curing stage, wherein at the first infrared preheating flash drying stage, a far infrared heating system with wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 70 and 80 DEG C for 2 to 3 minutes; at the second ultraviolet curing stage, ultraviolet rays with illuminance of 800 to 1,200mj / cm<2> irradiate the surface of the coating for 3 to 10 minutes; and at the third infrared curing stage, the far infrared heating system with the wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 120 and 130 DEG C for 5 to 10 minutes, so that the coating is cured to form a film. The problems that the surface of an irregular substrate is locally illuminated insufficiently and the coating has insufficient yellowing resistance and weather resistance are solved.
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Description

technical field

[0001] The invention relates to a curing coating, in particular to an ultraviolet-infrared dual curing varnish coating and a preparation method thereof. Background technique

[0002] The traditional UV curing coating is an environmentally friendly coating. Its advantages are: short curing time, low curing temperature, harmless curing (CO 2 Less), the amount of excluded solvent (VOC) is small, the appearance of the coating film is smooth, the sharpness of image is high, the hardness is high, and the equipment cost is low. Because of its high efficiency, low energy consumption, and beautiful appearance, it was once favored by automobile, motorcycle, and electric vehicle manufacturers. However, in the production process, the traditional UV-curable coatings also have many shortcomings, such as: not suitable for complex shapes, the shadow parts that cannot be irradiated by UV will cause insufficient curing, and the protruding parts may cause excessive UV irradia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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