New Copolymerizable Photoinitiators for Radiation Curing of Acrylic PSA

Abstract

This article presents a new class of copolymerizable photoinitiators containing vinyloxycarbonyl groups, known such as organic carbonate or carbamate. Novel copolymerizable photoinitiators have been prepared through the reaction between vinyl chloroformate and hydroxyl groups containing photoreactive derivatives such as benzophenone-, acetophenone-, benzoine-and anthrachinone-derivatives. The main emphasis is given to the influence of this new class of unsaturated photoinitiators on UV-crosslinking process of acrylic pressure-sensitive adhesives (PSA). Moreover, the paper describes the influence of various parameters such as UV-initiated crosslinking time and concentration of unsaturated photoinitiators on relevant PSA properties like tack, peel adhesion and shear strength (cohesion).

Synthesis and Characterization of a Trifunctional Photoinitiator Based on Two Commercial Photoinitiators with α-Hydroxyl Ketone Structure

“…UV curing technology has been developed quickly due to its high efficiency, environmental friendliness, energy savings, and good economics [ 1 , 2 , 3 ]. UV-cured materials have been used in coatings [ 4 , 5 ], adhesives [ 6 ], inks [ 7 ], electricity [ 8 ], biomaterials [ 9 ], 3D printing [ 10 ], and so on. Usually, UV systems consist of photoinitiators, oligomers, reactive diluents, and other additives.…”