Patent ID: 6045972
Filing Date: 2000-04-04
Classification: G03F

Abstract:
A method for coating a substrate comprising the step of applying to a substrate surface a photopolymerisable water-borne aqueous-alkaline developable coating composition comprisinga) 20 to 80% by weight of a film-forming, acid group-containing acrylated derivative of an epoxy resin which is sufficiently neutralized with ammonia or an amine or an inorganic base to promote the formation of the corresponding ammonium or amine or inorganic base carboxylates by a neutralization reaction, at least 10% by weight of said component a) consisting of an acrylate which consists of a reaction product of i) a polymolecular bisphenol advanced epoxy resin with ii) an ethylenically unsaturated monocarboxylic acid, which reaction product is subsequently reacted with a cyclic anhydride of an organic polycarboxylic acid,b) 0.1 to 15% by weight of a photoinitiator,c) at least about 20% by weight of water to make up 100% by weight of the composition, or in addition to at least about 20% by weight of water, up to 15% by weight of an organic solvent, andd) 1 to 25% by weight of optional components, as well ase) one or more additional optional (meth)acrylate monomer or (meth)acrylate oligomer or a vinyl compound that can be crosslinked with light.