A process for the production of coatings with scratch-resistant durable surfaces
that comprise as photoinitiator (B) in a photocurable formulation at least one
surface-active photoinitiator, concentrated at the surface of the formulation,
of formula (Ia) or (Ib), wherein Ra is a radical of formula (IIa), Rb
is a radical of formula (IIb)), or Ra and Rb are naphthyl,
anthracyl, phenanthryl or a heterocyclic radical each of which is unsubstituted
or substituted; R1, R2, R3, R4, R5,
R6, R7, R8, R9 and R10 are,
for example, each independently of the others hydrogen; A-Y; C1-C12alkyl,
halogen or phenyl; R11 and R12 are, for example, C1-C12
alkyl; X is —OR20 or —N(R21)(R22);
R20 is, for example, hydrogen or C1-C4alkyl; R21 and R22 are, for example,
hydrogen or C1-C12 alkyl; X1 is, for example,
—O—; Y is, for example, a single bond or —O—; Y1 is,
for example, a single bond; and A is, for example, C6-C30alkyl.