| abstract |
Represented by formula (I) or (II), in the expression, R 1, R 2, R 3, R 1 a, R 2 a and R 3 a are each independently, C 1 -C 4 - alkyl , C 1 -C 4 -alkoxy or halogen, X is O, NR 5 or S, or when R 4 is Cl, F or Br, X is a direct bond and Y is O or S, n is 1 or 2, and R 4 is, for example, hydrogen, (CO) R 6 , (CO) OR 6 , (CO) NR 5 R 6 , when n is 1, (SO 2 ) —R 6 , C 1 -C 28 -alkyl, R 4 is, for example, C 1 -C 18 -alkylene when n is 2, and R 5 is, for example, hydrogen or C 1 -C 12 - alkyl, R 6 is for example C 1 -C 12 - alkyl, R 7, R 8 and R 9 independently of one another, for example Alkyl, R 10 is, for example, C 2 ~C 18 - - C 1 ~C 4 alkylene, X 1 is O or S, m is 1, 2 or 3, Q is, m + bisacylphosphine oxides or bisacylphosphine sulfides represents one or two inorganic cation or an organic cation having a charge of a suitable photoinitiator obtainable by the process of the appended claims. |