| 摘要 |
Compounds of formula I <CHEM> wherein R1, R2, and R3 independently of one another are hydrogen; C1-C20alkyl which is unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-C8alkyl)O-(CO)-, (C1-C4alkyl)-(CO)O- or/and di(C1-C4alkyl)amino; or R1, R2, and R3 independently of one another are C3-C6alkenyl; phenyl which is unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-C8alkyl)O(CO)-, (C1-C4alkyl)-(CO)O- or/- and di(C1-C4alkyl)amino; or R1 and R2 together are C2-C9alkylene, o-xylylene, 2-butenylene, C3-C9oxaalkylene or C3-C9azaalkylene; R4, R5, R6, and R7 independently of one another are sec-C3-C20alkyl, tert-C4-C20alkyl or phenyl wherein these radicals are unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-C8alkyl)O(CO)-, (C1-C4alkyl)-(CO)O- or/and di(C1-C4alkyl)amino; or R4 and R5, and/or R6 and R7 together are C2-C9alkylene, o-xylylene, 2-butenylene, C3-C9oxaalkylene or C3-C9azaalkylene, or R4 and R6, and/or R5 and R7 together are branched C2-C9alkylene, o-xylylene, 2-butenylene, C3-C9oxaalkylene or C3-C9azaalkylene; are suitable as photoinitiators for the photopolymerization of unsaturated compounds. |
