Oxetane or polyhydroxy compounds are introduced into the cationic UV curing system, and the hydroxyl group acts as a chain transfer agent to accelerate polymerization.
There are inherent shortcomings in free radical photopolymerization and cationic photopolymerization initiation technologies, such as high volatility, large oxygen inhibition, high shrinkage or slow curing speed, serious influence of moisture, etc. Hybrid systems are a method that can improve these shortcomings.
Cationic UV system diluents can be a mixture of free radical diluents containing double bonds and cationic diluents. However, there are also some monomers such as vinyl compounds that are electron-rich. Under the action of strong acid, vinyl compounds can undergo cationic polymerization, which can be used for free radical curing and can also be used in cationic curing systems. Polymer has strong dilution effect