Abstract: A multi-part water-borne coating composition is provided. The multi-part composition includes water, a first part, and a second part. The first part comprises (a1) a core-shell latex copolymer having pendant hydroxyl and pendant carbonyl groups. The second part comprises (b1) at least one polyisocyanate compound having pendant —NCO groups. The multi-part composition also includes at least one polyhydrazide compound having at least two hydrazide groups of the formula —C(?O)—NH—N(Rh)(Ri), wherein Rh and Ri are independently H or C1-C12 alkyl. The molar ratio of hydroxyl groups to —NCO groups in the composition is from 5:1 to 1:5. The molar ratio of hydrazide groups to carbonyl groups in the composition is from 5:1 to 1:5.

Abstract: A water-borne coating composition is provided. The water-borne coating composition includes water, a binder, and a crosslinker. The binder comprises (a1) a core-shell latex copolymer having pendant carbonyl groups. The crosslinker comprises (b1) at least one polyhydrazide compound having at least two hydrazide groups of the formula —C(?O)—NH—N(Rh)(Ri), wherein Rh and Ri are independently H or C1-C12 alkyl. The molar ratio of hydrazide groups to carbonyl groups in the composition is from 5:1 to 1:5.