Patent ID: 8349407

Claim:
A process for forming a sag-free coating layer on a substrate, said process consisting of the steps of: A) applying a coating composition over said substrate forming a sag-free wet coating layer having a wet coating thickness in a range of from 10 to 36 mils, wherein said coating composition comprises a binder consisting essentially of: i) a crosslinkable component consisting essentially of at least one acrylic polymer having one or more crosslinkable functional groups; ii) a polytrimethylene ether diol having a Mn (number average molecular weight) in a range of from 500 to 10,000; iii) a sag control agent consisting essentially of a reaction product of an amine and an isocyanate in the presence of said at least one acrylic polymer; and iv) a crosslinking component consisting essentially of at least one crosslinking agent having one or more crosslinking functional groups; and B) curing said sag-free wet coating layer to form said sag-free coating layer, wherein said sag free coating layer having a dry sag free coating layer thickness in a range of from 6 mils to 20 mils.