| 摘要 |
The present invention discloses compounds of formula I, wherein R1 is alkyl from 1 to 4 carbon atoms, R2 is hydrogen alkyl from 1 to 4 carbon atoms, or alkoxy from 1 to 4 carbon atoms, and R3, R4, R5, R6 and R7, independently from each other are hydrogen, halogen, alkyl from 1 to 20 carbon atoms, cyclopentyl, cyclohexyl, alkenyl from 2 to 12 carbon atoms, alkyl from 2 to 18 carbon atoms, which is interrupted by one or more oxygen atoms, or they are alkyl from 1 to 4 carbon atoms and/or alkoxy from 1 to 4 carbon atoms, on the condition that at least one of R3, R4, R5, R6 and R7 radicals are other that hydrogen and in such a way that, if R1 and R2 are methyl, R3 and R6 are not methyl, and mixtures of such compounds with alpha-hydroxyketones, benzophenones and alpha-aminoketones, are adequate as photoinitiators. |
