Binder composition, coating composition containing this binder, production and use thereof

Abstract

A binder composition, a coating composition containing this binder, a process for its production and use to produce single or multi-layer lacquer coatings, particularly in the automotive sector, are described. The binder composition contains A) 25 to 75 wt. % of the reaction product of one or more carboxy-functionalised poly(meth)acrylic copolymers and/or one or more carboxy-functionalised polyesters, each with an acid value of 15 to 200 mg KOH/g, with one or more lactones, B) 25 to 75 wt. % of one or more epoxy-functionalised crosslinking agents with at least two epoxy functional groups per molecule, with a number average molecular weight (Mn) of 200 to 10000 g/mol, C) 0 to 60 wt. % of one or more polyols with at least two hydroxyl functional groups per molecule, D.sub.1) 0 to 20 wt. % of one or more melamine resins, D.sub.2) 0 to 40 wt. % of one or more capped polyisocyanates, wherein the sum of the weight percentages of components A), B), C), D.sub.1) and D.sub.2) is 100 wt. %, together with E) 0 to 10 wt. % of one or more catalysts to catalyse the reaction of the carboxyl and epoxy groups, related to the sum of the weights of components A) to D.sub.2).

Dependencies are inferred from the claim text.