| 摘要 |
The invention relates to a composition comprising polymerisable material and an anionic photocatalyst. The photocatalyst is a photolabile compound able to liberate a strong base having a pKa >/= 12. The catalyst can be illustrated by the structural formula Z-A wherein Z is a photolabile group and A is a strong base, for example, a nitrogen containing compound such as, for example, a secondary amine, a guanidine or amidine and Z is covalently bound to A. |
