Uv-active binding agent

1. Process for the preparation of poly (meth) acrylates curable with actinic radiation and / or dual cure including the following steps a) preparation of a poly (meth) acrylate having hydroxyl functional side chains by polymerizing aa) at least one (meth) acrylate of general formula (I), as component (Omitted) wherein R1 is H, CH3 or CH2OH, and R 2 is an alkyl or cycloalkyl group, optionally substituted with functional groups such as acryl groups, ether, amino, epoxy, halogen or sulfonic acid; and ab) at least one (meth) hydroxyalkyl acrylate of general formula (II) as component B (See formula) where R1 is H, CH3 or CH2OH, and R3 is - (CH2) n-, -CH2 - CH (CH3) -CH2- or -CH2CH (CH3) - or -CH (CH3) CH2- or (Omitted) where n is at least 2; and c) optionally further comonomers copolymerizable with the (meth) acrylates of general formulas (I) and (II), as component C; and d) optionally auxiliary monomers case, as component D; b) esterification or transesterification of poly (meth) acrylate having hydroxy functional side chains with a (meth) acrylate or (meth) acrylic acid, in the presence of an enzyme catalyzing esterification or transesterification.