Phenolic resin-polyisocyanate binder systems containing a drying oil and use thereof

A binder composition comprising in admixture a resin component, a hardener component, a curing component and a drying oil;

• said resin component including a non-aqueous phenolic resin which comprises a condensation product of a phenol having the general formula:
• ##STR7## wherein A, B and C are hydrogen, hydrocarbon radicals, or halogen, with an aldehyde having the general formula R'CHO wherein R' is a hydrogen or a hydrocarbon radical of 1 to 8 carbon atoms;
• said hardener component comprising liquid polyisocyanate containing at least two isocyanate groups, and said drying oil is selected from the group of ester of ethylenically unsaturated fatty acid, heat bodied modification thereof, air-blown modification thereof, oxygen-blown modification thereof, or mixtures thereof.