abstract |
ABSTRACT Compounds having the formula I and II in which R1 is -CH2X, -CHX2, or -CX3; R2 is H or R1; X is Cl, or Br or I; and Y is S, O, or carbonyl. are disclosed as well as their use as ultraviolet photopolymerization initiators in combination with unsaturated monomers, e.g., acrylates. |