The invention provides aqueous resin emulsion containing a resin obtained
by reaction of a composition containing at least: at least one
polyhydric alcohol having at least two hydroxyl groups, at least one
polyetherpolyol having a molecular weight of 400 to 8000 g/mol, at least
one monobasic carboxylic acid, and at least one polybasic carboxylic acid
having at least two carboxyl groups or its anhydride,to form a resin and
the resin emulsion is modified by providing basic groups. The invention
further relates to a process for preparing a resin, to a resin as
obtained by the process and to a coating film obtained from the resin
emulsion.