CURABLE FILM-FORMING COMPOSITIONS DEMONSTRATING ADHESION TO DIVERSE SUBSTRATES AND FAST SANDABILITY

The present invention is directed to curable film-forming compositions and coating kits, each comprising: (a) a polyepoxide functional polymer; (b) a polythiol functional compound, wherein the polythiol functional compound comprises at least two or at least three thiol functional groups and wherein if the polythiol functional compound contains hydroxyl functional groups, the ratio of thiol functional groups to hydroxyl functional groups within the polythiol functional compound is not 1:1; (c) a reactive compound different from the polythiol functional compound (b), containing multiple pendant and/or terminal functional groups selected from carboxylic acid, anhydride, amine and phenol that are reactive with epoxide functional groups; and (d) a pigment. The curable film-forming composition demonstrates a pigment to binder ratio greater than or equal to 2 and less than 3, adhesion to diverse substrates, and fast sandability. The present invention is further directed to coated articles and methods of forming them.