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Abstract

In a process for the production of a strongly adherent coating on an inorganic or organic substrate, wherein a), a low-temperature plasma treatment, a corona discharge treatment or a flame treatment is carried out on the inorganic or organic substrate, b) one or more photoinitiators or mixtures of photoinitiators with monomers or/and oligomers, containing at least one ethylenically unsaturated group, or solutions, suspensions or emulsions of the afore-mentioned substances, are applied to the inorganic or organic substrate, and optionally, c) using suitable methods those afore-mentioned substances are dried and/or are irradiated with electromagnetic waves, it proves advantageous to use compounds of formula (I), (II), (III) and/or (IV), IN-L-RG (I), >IN-L-RG.sub.1-L.sub.1-H (II), IN-L-RG.sub.1-L.sub.1-IN.sub.1 (III), IN-L-RG.sub.1-L.sub.1-RG.sub.2-L.sub.2-IN.sub.1 (IV), wherein IN and IN.sub.1 are each independently of the others a monacylphosphine, monoacylphosphine oxide or monoacylphosphine sulfide photoinitiator group; L.sub.1 L.sub.1 and L.sub.2 are a single bond or a spacer group; RG is a monovalent radical having at least one ethylenically unsaturated C.dbd.C bond; and RG.sub.1 and RG.sub.2 are each independently of the other a divalent radical having at least one ethylenically unsaturated C.dbd.C bond.

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