1.Components UV curing coatings are mainly composed of four parts, namely, oligomers, monomers, photoinitiators, additives, etc. The curing reaction course is relatively simple, under the action of light radiation, the initiator is gradually decomposed, generating a certain amount of free radicals, the free radicals are able to trigger the monomers/oligomers joint crosslinking. According to relevant research, if the photoinitiator initiation efficiency is low, it will increase the cost of UV curing coating formulations and reduce the rate of light curing, therefore, combined with the initiator problem, the relevant researchers have put forward a variety of curing technologies, commonly found in light and dark curing technology and hybrid curing technology.
2. Application areas UV curing coatings in the oligomer can form a good curing film crosslinking mesh structure skeleton, the physical properties of the product and the chemical properties have a greater impact, multifunctional monomers can play a certain role in the dilution of the formula, not only to improve the processability of coatings, but also to accelerate the polymerisation rate of light solid system.
For example, in the process of coating wood paint, the relevant staff can be painted in accordance with the following process: first of all, MDF blanks are fully processed to ensure that all the dust on the surface is removed; secondly, spray quantitative UV curing coatings, and the use of infrared light for melt processing, to enhance the speed of ultraviolet light curing; finally, the MDF is fully inspected.
The application of UV curing coatings to plastic products can effectively improve the stability of plastic products, preventing plastic products from deformation or outgassing. In recent years, along with the wider and wider application of alloy products, the use of UV curing coatings has increased year by year. If the traditional powder coating decoration is applied, it will have a greater impact on the metallurgical properties of the alloys at 115℃.
In the shock absorbers, motors and other prefabricated products, due to its surface to install electronic components and plastic and other heat-sensitive parts, if the use of traditional coatings, will seriously affect the safety of these heat-sensitive parts, through the reasonable application of UV curing coatings, can effectively enhance the corrosion resistance of alloys and prefabricated assemblies.
