At present, domestic light-curing coating inks are mainly free radical systems. Light-curing ink coatings only account for 1-3% of global ink coatings. Free radical light-curing ink coatings have not achieved the expected results in some applications. There are still some bottlenecks that need to be broken through, and some defects need to be improved, such as excessive shrinkage and poor weather resistance And higher halogen content. Cationic systems can make up for these shortcomings of free radical systems.
Materials and cation-curable resins (clear coatings, inks, adhesives, three-dimensional lithographic printing) Light-curing technology is a light-processing process that solidifies liquid resins at high speed by irradiating ultraviolet light at a certain wavelength, which saves energy It does not contain solvents, has a protective effect on the ecological environment, and does not emit toxic gases and carbon dioxide to the atmosphere, so it is known as "green technology".
A certain proportion of cycloaliphatic epoxy resin needs to be added to light-curing coatings and inks.
Fast curing speed, low shrinkage, no wrinkle on the surface, strong adhesion, corrosion resistance, not only retain the original epoxy performance, but also greatly accelerate its curing speed, so that it will cure within minutes or even seconds, Greatly improved labor productivity.
The use of light curing technology to obtain hardened paint films and inks has the following advantages: energy saving, environmental protection, high quality and efficiency.