Sensitized photoinitiator system for addition polymerization

摘要

A visible light sensitive free radical polymerization photoinitiator composition comprising (a) an initiator selected from diaryl iodonium salts, halogenated triazines, and triaryl sulfonium salts having a reduction potential in the range 0.0 to -1.5 eV, and (b) at least one merocyanine sensitizer containing a constrained alkylamino group. These initiator compositions give high speed polymerization reactions with ethylenically unsaturated monomers and oligomers.