Patent ID: 7223813

Claim:
An aqueous coating composition comprising an ambient temperature self-crosslinkable water-dispersible vinyl oligomer(s) having a measured weight average molecular weight in the range of from 1,000 to 80,000 Daltons and dispersed vinyl polymer(s) and 0 to 25% of co-solvent by weight of the composition where the ratio of said self-crosslinkable vinyl oligomer(s) to the dispersed vinyl polymer(s) is in the range of from 90:10 to 10:90 and said dispersed vinyl polymer(s) has a measured weight average molecular weight ≧90,000 Daltons and wherein said composition when drying at ambient temperature crosslinks to form a coating that has the following properties: i) an open time of at least 20 minutes at 23+/−2° C.; ii) a wet edge time of at least 10 minutes at 23+/−2° C.; iii) a tack-free time of ≦20 hours at 23+/−2° C.; and iv) an equilibrium viscosity of ≦3,000 Pa.s, at any solids content when drying in the range of from 20 to 55% by weight of the composition, using any shear rate in the range of from 9±0.5 to 90±5 s −1 and at 23±2° C.; and wherein said self-crosslinkable water-dispersible vinyl oligomer(s) is ≦60% by weight soluble in water throughout a pH range of from 2 to 10.