PROCESS FOR PRODUCING WATER-DILUTABLE VARNISH BINDERS AND THEIR USE

摘要

(57) The invention relates to a process for producing water-dilutable varnish binders and their use in manufacturing water-di-lutable fillers for automobile paintwork. The binders contain a reaction product, which is dilutable with water after the neutralisation of the carboxyl groups, of a polyurethane resin having carboxyl groups and at least one terminally blocked isocyanate group (polycarboxyl component) with a polyester having a hydroxyl group (polyhydroxyl component) and a cross-linking component. Further improvements in the shelf-life of the varnishes can be attained by specially selecting the binder components and special processing steps for the combination thereof.