HIGH SENSITIVITY PHOTOPOLYMERIZABLE COMPOSITIONS CONTAINING HYDROGEN DONATING MERCAPTANS

摘要

43847CAN1A The invention provides sensitivity increases in high light sensitivity free radical photopolymerization reactions. Compositions based on ethylenically unsaturated monomers or oligomers and photoinitiators selected from iodonium salts and halotriazines show higher speeds by the addition of hydrogen donating mercapto compounds. The compositions are valuable in negative-acting photopolymerizable compositions such as high speed printing plates.