| abstract |
Compounds of formula (I) in which r is a number 1 or 2; s is a number from 1 to 1000; R is radical of formula (II); or R is, for example, unsubstituted o r substituted naphthyl, anthracyl, phenanthryl or a heterocyclic radical; R1, R2, R3, R4 and R5 independently of one another are, for example hydrogen; unsubstituted or substituted phenyl or C1-C12alkyl; A, if s is 1, is a surfa ce- active radical of formula (III); or A, if s is 1, is a surface-active radica l A0; or A, if s is a number greater than 1, is a radical of the formula (III) in which n corresponds to the number s, or A, if s is 2, is a radical A1; A0 is, for example, in each case unsubstituted or substituted C6-C30alkyl, C6- C30alkenyl, C6-C30alkynyl or C6-C30aralkyl; A1 is, for example, in each case unsubstituted or substituted C6-C30alkylene, C6-C30alkenylene, C6- C30alkynylene or C6-C30aralkylene; n is, for example, a number from 1 to 100 0; m is a number from 0 to 100; p is a number 0-10000; x is a number from 1 to 10; Y, if r is 1, is a divalent group and Y, if r is 2, is a trivalent group , and Y, if A has the definition A0, is a single bond; G1, G2, R13, R14, R15, R16, R17, R18, R19, R20, R21 and R22 are, for exmple, C1-C18alkyl; are particularly suitable as photoinitiators which accumulate at the surface in a process for curingcoatings. |