Patent ID: 6863982

Claim:
A curable film-forming composition comprising (i) 5 to 95 percent by weight based on the total weight of resin solids in the film-forming composition of a crosslinking agent; (ii) 5 to 95 percent by weight based on the total weight of resin solids in the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) 0.01 to 15 percent by weight based on the total weight of resin solids in the film-forming composition of at least one additive selected from the group consisting of: (a) a reaction product of phosphorous acid and at least one diepoxide wherein the molar ratio of phosphorous acid to diepoxide ranges from 1.06:1.05 to 1.2:1.05; (b) a reaction product of phosphorous acid, at least one diepoxide, and at least one anhydride; (c) a reaction product of phosphorous acid, at least one diepoxide, and at least one anhydride, chain extended with at least one diol; (d) a reaction product of phosphorous acid, at least one monoepoxide, and at least one anhydride, chain extended with at least one diepoxide; and (e) mixtures thereof.