Photopolymerizable mixture and photopolymerizable copying material containing same

Abstract From the Canadian patent

A photopolymerizable mixture is described which contains a polymeric binder, a polymerizable compound and an acridine compound of the general formula I, (see fig. I), as photoinitiator in which, R1 denotes an optionally substituted alkyl or acyl group, R2, R3 are identical or different and denote and R4 hydrogen or halogen atoms or optionally substituted alkyl or acyl groups, R5, R6 are identical or different and denote and R7 hydrogen or halogen atoms or optionally substituted alkyl, aryl or acyl groups or groups of the formula II, (see fig. II) The photoinitiators yield a mixture having high photosensitivity and have a lower tendency to diffusion than the known 9-phenylacridine.