Abstract: A coating composition includes: (a) a polymeric resin including hydroxyl functional groups; (b) a polyisocyanate crosslinker; (c) a thiol including at least 2 active hydrogen groups, where the active hydrogen groups include a thiol group or a combination of a thiol and a hydroxyl group; and (d) a tin-based catalyst. The ratio of the number of moles of thiol to the number of moles of tin in the coating composition is less than or equal to 100:1 and the amount of (d) the tin-based catalyst is less than or equal to 0.25% by weight relative to the total resin solids, and/or the ratio of the number of moles of thiol to the number of moles of tin ranges from 3:1 to 50:1 and the amount of (d) the tin-based catalyst is less than or equal to 0.4% by weight relative to the total resin solids.

Abstract: A coating composition includes: (a) a polymeric resin including hydroxyl functional groups; (b) a polyisocyanate crosslinker; (c) a thiol including at least 2 active hydrogen groups, where the active hydrogen groups include a thiol group or a combination of a thiol and a hydroxyl group; and (d) a tin-based catalyst. The ratio of the number of moles of thiol to the number of moles of tin in the coating composition is less than or equal to 100:1 and the amount of (d) the tin-based catalyst is less than or equal to 0.25% by weight relative to the total resin solids, and/or the ratio of the number of moles of thiol to the number of moles of tin ranges from 3:1 to 50:1 and the amount of (d) the tin-based catalyst is less than or equal to 0.4% by weight relative to the total resin solids.

Abstract: Disclosed are thermally curable film-forming compositions comprising a binder, a flow control system comprising a sag control agent, and less than 5.0 wt.-% of melamine-based components, based on the total weight of resin solids in the film-forming composition, as well as methods for forming a cured coating on a substrate and substrates comprising the cured coating layer.

Abstract: A two-component waterborne coating system includes: a first component including an acid-functional polymer having an acid value of at least 100, based on total resin solids, dispersed in an aqueous medium; and a second component separate from the first component. The second component includes an epoxy-functional compound. A method of preparing a two-component waterborne coating system and two-component waterborne coating system kit are also described herein.