| abstract |
Polycyclic aromatic compounds having at least two conjugated aromatic rings at least one of which has a substituent comprising a cyclic carbonate group can be used as sensitisers for cationic photoinitiators, especially iodonium compounds, and may also function as monomers in cationically initiated radiation curable compositions, especially coating compositions, such as printing inks and varnishes. The preferred compounds include compounds of the following formulae: |