Solvent borne coating composition having improved sag resistance and process for producing coatings therefrom

A process for producing a coating on a substrate, the process comprising the steps of:

• (a) mixing a crosslinkable component of a solvent borne brushable coating composition having improved sag resistance with a crosslinking component of said composition to form a potmix, wherein said crosslinkable component comprises a polymer having two or more crosslinkable groups and wherein said crosslinking component comprises a crosslinking agent having crosslinking groups;
• and wherein said composition further comprises a sag control agent prepared by polymerizing a mixture comprising an amine monomer, an isocyanate monomer and a drying oil chosen from one comprising linseed oil, tung oil, poppy seed oil, perilla oil, walnut oil or a combination thereof, wherein said mixture comprises from about 0.5 to about 3 weight percent of said amine monomer and from about 0.5 to about 3 weight percent of said isocyanate monomer, wherein said weight percentages are based on the total weight of said mixture;
• (b) brushing a layer of said pot mix over said substrate, wherein said potmix has a sag resistance in the range of from about 5 to about 20 mils (127 to 508 micrometers) under ASTM test D4400-99;
• and
• (c) curing said layer under ambient conditions to form a coating on said substrate.