Polymerizable Type II photoinitiators and curable compositions

摘要

A polymerizable Type II photoinitiator according to Formula (I):
wherein:
A represents a Norrish Type II initiating group;
L represents a divalent linking group positioning the Norrish Type II initiating group A and the CR2R3-group in a 1-5 to a 1-8 position wherein position 1 is defined as the first atom in the aromatic or alicyclic ring of A to which L is covalently bonded and the position 5 to 8 is defined as the carbon atom of the CR2R3-group to which L is covalently bonded, with the proviso that L does not contain an amine. Radiation curable compositions and inks including the multifunctional Type II photoinitiator are also disclosed.