Patent ID: 7008998

Claim:
A method of making an aqueous dispersion, comprising providing a polymer (a) comprising at least one water dispersible group per molecule and one or more functional groups (f) reactive with crosslinking agent (b), providing at least one crosslinking agent (b) comprising one or more blocked functional groups (f b ) that are reactive with polymer (a) after unblocking, wherein crosslinking agent (b) has a T g of from 40 to 70° C./105 to 158° F. and is a solid at 23.9° C./75° F. when at 100% by weight solids, mixing crosslinking agent (b) into polymer (a) at a temperature that is at or above the melting temperatures of both polymer (a) and compound (b) but which is below the temperature at which blocked functional groups (f b ) unblock, so as to provide a melt-mixture (ii), and adding a sufficient amount of water to the melt-mixture (iii) so as to provide an aqueous dispersion.