UV-CURING PROTECTIVE COAT FOR THERMOPLASTIC SUBSTRATES

摘要

The present invention relates to a multi-coat product comprising a first coat (S1) and a second coat (S2), Sl being obtainable from A) one or more aliphatic polymer precursors selected from at least one of the groups consisting of the components A.1 and A.2, A.1) being aliphatic oligomers containing urethane bonds or ester bonds and having at least two acrylate functions per molecule, or mixtures of such oligomers, and A.2) being aliphatic reactive diluents having at least two acrylate groups per molecule, or mixtures of such reactive diluents; B) one or more finely divided inorganic compounds; C) at least one organic UV absorber selected from the group consisting of triazine derivatives and biphenyltriazine derivatives, preferably at least one UV absorber from the biphenyltriazine derivatives; D) if desired, one or more free-radical scavengers of the HALS class; E) if desired, one or more flow control agents; F) if desired, one or more solvents; and G) at least one specific photoinitiator selected from the group consisting of acylphosphine oxide derivatives and a-aminoalkylphenone derivatives, and the second coat being a thermoplastic polymer. The invention further relates to the composition of the UV-curable first coat, to a process for producing these multi-coat products, and to products which comprise the stated multi-coat products.