BENZOPHENONE DERIVATIVES

摘要

Compounds of the general formula in which X represents -SO3H or an alkali metal salt thereof, or NR<5>R<6>R<7><+>A<-> in which R<5> represents an alkyl or benzyl group, each of R<6> and R<7> independently represents an alkyl group, and A<-> represents one equivalent of an anion; and each of R<1>, R<2>, R<3> and R<4> independently represents a hydrogen or halogen atom, a hydroxy group, a C(1-6) alkyl, alkoxy or alkylthio group, or a group of formula -O.CH2.CH(OH)CH2X, in which X has the meaning given above; are useful as photoinitiators.