Heterogeneous Initiation in Photochemical Processes

By M. Koehler, J. Ohngemach, E. Poetsch, E Merck - RadTech Europe Conference 1989

Covalent photoinitiator fixation on silica transfers the photoactivity to the solid surface. The dispersion of the initiator modified material in a monomer solution forms a heterogeneous photopolymerizable system. A microcoating of the particles becomes possible if aggregation of the system is avoided. Porous (Si 60) and spheric (Monospher 500) silica are the solid supports for the heterogeneous photoinitiation process.