Polymeric (meth)acrylate photoinitiators

A compound of formula (I)

• wherein
• G is the residue of optionally ethoxylated and/or propoxylated monomeric, oligomeric or polymeric polyols G-(OH) m+q+p;
• m is from 1 to 7
• q is from 1 to 7;
• p is from 0 to 6;
• m+q+p is from 3 to 8;
• R1 is CH2═CH—C(═O) or CH2═C(CH3)—C(═O);
• R2 is selected from
• wherein
• X is selected from O, S, C(R4)(R5) and NR7;
• Y is selected from O, S, C(R4)(R5) and NR6;
• R4 and R5 each independently, are selected from H, C1-C12 alkyl, OH and C1-C10 alkoxy;
• R6 is selected from H, C1-C8 alky;
• R7 is H, C1-C8 alkyl or unsubstituted phenyl;
• and the wavy line shows the bonds linking to the keto groups of formula (I).