1. Photoinitiator in UV-Curable Systems (Major Application)
This is one of its primary and most significant uses. 4-Methylbenzophenone acts as a photoinitiator in UV-curable coatings, inks (especially for packaging, labels, and food packaging, though usage depends on specific regulations), and adhesives. When exposed to ultraviolet (UV) light, it generates free radicals that initiate the polymerization (curing) process, leading to rapid hardening and improved performance of the material. It is often used in combination with other photoinitiators or synergists to optimize curing speed and efficiency.