Novel acylphosphine oxides

摘要

PCT No. PCT/EP95/03392 Sec. 371 Date Mar. 5, 1997 Sec. 102(e) Date Mar. 5, 1997 PCT Filed Aug. 29, 1995 PCT Pub. No. WO96/07662 PCT Pub. Date Mar. 14, 1996Compounds of formula (I), in which X is oxygen or sulfur, R1, R2 and R3 independently of one another are a group (a), C2-C8alkenyl, phenyl which is unsubstituted or is substituted from one to four times with C1-C12alkyl, C1-C12alkoxy, C1-C6alkylthio and/or halogen, or are naphthyl which is unsubstituted or is substituted from one to four times with C1-C12alkyl, C1-C12alkoxy, C1-C6alkylthio and/or halogen, or are biphenyl which is unsubstituted or is substituted from one to four times with C1-C12alkyl, C1-C12alkoxy, C1-C6-alkylthio and/or halogen, or R1, R2 and R3 independently of one another are an O-, S- or N-containing 5- or 6-membered heterocyclic ring, R1 is in addition a group of formula (II), or R1 and R2 are linked to form a ring containing 4 to 10 carbon atoms which is unsubstituted or substituted by 1 to 6 C1-C4alkyl groups, R4, R5 and R6 independently of one another are hydrogen or C1-C18alkyl, or R5 and R6, together with the carbon atom to which they are attached, form a cyclopropyl, cyclopentyl or cyclohexyl ring, and R7, R8, R9 and R10 independently of one another are hydrogen, C1-C4alkyl, C1-C4alkoxy or halogen, are suitable as photoinitiators for the photopolymerization of ethylenically unsatured systems. (I) (II) (a)