A photoinitiator compound comprising a photoactive moiety Q and an amine functionality represented by formula wherein R 4 and R 5 are a photoactive moiety Q; R 6 is linear or branched C 1 -C 20 alkyl which optionally is substituted by one or more identical or different Y 2; or is linear or branched C 2 -C 20 alkyl which is interrupted by one or more identical or different Y 1 and which interrupted C 2 -C 20 alkyl optionally is substituted by one or more identical or different Y 2; or is a group E-R 9 or E 1 -R 13; Q is a photoactive moiety wherein the asterisk (*) denotes the bonding to the N atom; Z is a group wherein the double asterisk (**) denotes the bonding to the phenyl ring and the asterisk (*)denotes the bonding to the nitrogen atom; X isO; R 3 is hydrogen or CH 3; Y 1 is O or NR 16; Y 2 is N(R 10)(R 11); R 9 is hydrogen; R 10 and R 11 independently of each other are a photoactive moiety Q, hydrogen, or R 10 and R 11 are linear or branched C 2 -C 18 alkyl which is interrupted by one or more O and which interrupted C 2 -C 18 alkyl optionally is substituted by OR 12; R 12 is hydrogen; R 13 is N(R 10)(R 11); R 16 is a photoactive moiety Q, hydrogen, or linear or branched C 2 -C 18 alkyl which is interrupted by one or more O and which interrupted C 2 -C 18 alkyl optionally is substituted by OR 12 or NR 10 R 11; E is a group wherein the asterix (*) denotes the bond to the N-atom; G 2 in the occurring moiety/moieties are identical or different and are linear or branched C 2 -C 6 alkylene; a in the occurring moiety/moieties independently are an integer 1-50; M in the occurring moiety/moieties or are identical or different and are O or N(R 16); E 1 is a group wherein the asterix (*) denotes the bond to the N-atom; e is 1; G 3 in the occurring moiety/moieties are identical or different and are linear or branched C 2 -C 6 alkylene; the sum of b + c + d is an integer 1-12; and R 23 is linear or branched C 1 -C 6 alkyl. R 4 and R 5 are a photoactive moiety Q; R 6 is linear or branched C 1 -C 20 alkyl which optionally is substituted by one or more identical or different Y 2; or is linear or branched C 2 -C 20 alkyl which is interrupted by one or more identical or different Y 1 and which interrupted C 2 -C 20 alkyl optionally is substituted by one or more identical or different Y 2; or is a group E-R 9 or E 1 -R 13; Q is a photoactive moiety wherein the asterisk (*) denotes the bonding to the N atom; Z is a group wherein the double asterisk (**) denotes the bonding to the phenyl ring and the asterisk (*)denotes the bonding to the nitrogen atom; X isO; R 3 is hydrogen or CH 3; Y 1 is O or NR 16; Y 2 is N(R 10)(R 11); R 9 is hydrogen; R 10 and R 11 independently of each other are a photoactive moiety Q, hydrogen, or R 10 and R 11 are linear or branched C 2 -C 18 alkyl which is interrupted by one or more O and which interrupted C 2 -C 18 alkyl optionally is substituted by OR 12; R 12 is hydrogen; R 13 is N(R 10)(R 11); R 16 is a photoactive moiety Q, hydrogen, or linear or branched C 2 -C 18 alkyl which is interrupted by one or more O and which interrupted C 2 -C 18 alkyl optionally is substituted by OR 12 or NR 10 R 11; E is a group wherein the asterix (*) denotes the bond to the N-atom; G 2 in the occurring moiety/moieties are identical or different and are linear or branched C 2 -C 6 alkylene; a in the occurring moiety/moieties independently are an integer 1-50; M in the occurring moiety/moieties or are identical or different and are O or N(R 16); E 1 is a group wherein the asterix (*) denotes the bond to the N-atom; e is 1; G 3 in the occurring moiety/moieties are identical or different and are linear or branched C 2 -C 6 alkylene; the sum of b + c + d is an integer 1-12; and R 23 is linear or branched C 1 -C 6 alkyl.