TAMPERPROOF SECURITY DOCUMENT AND PROCESS FOR PREPARING TAMPERPROOF SECURITY DOCUMENTS

摘要

A process for preparing a tamperproof security document comprising in order the steps of: a) providing a security document comprising security paper having at least one image on at least one outermost surface of the security paper; b) applying by printing, coating or other application process an aqueous primer composition on at least one of the outermost surfaces of the security paper over the at least one image thereby forming a primer coating on at least the at least one image; c) drying said primer coating; d) optionally curing said primer composition; e) applying by printing, coating or other application process a crosslinkable composition over said primer coating; and f) curing said printed or coated crosslinkable composition, wherein the primer composition comprises at least one ionic fluorinated surfactant and at least one polymerizable substance selected from the group consisting of polyester acrylates, polyester methacrylates, polyurethane- and urea-based monomers.