Waterborne coating compositions having improved smoothness

A waterborne coating composition comprising a polymeric film-forming resin selected from the group consisting of water dispersible or emulsifiable acrylic polymers, polyesters, alkyds, and polyurethanes in aqueous medium in an amount in the range of about 35 to 75 percent by weight based on total weight of resin solids, pigment and from about 0.1 percent to about 10 percent by weight based on weight of total resin solids of at least one material having the following structure:

• ##STR6## where n is an integer from 1 to 3, R.sup.1 is hydrogen or lower alkyl having 1 to 5 carbon atoms, R.sup.2 is a divalent ethylene or methylethylene group or mixture thereof, and R.sup.3 is an non-hydroxyl substituted alkyl, aryl, or alkylaryl group having 1 to 20 carbon atoms selected from the group consisting of linear aliphatic, branched aliphatic, cycloaliphatic, and aromatic alkyl groups, wherein the material of (I) is the reaction product of the transcarbamoylation reaction of a nitrogen-containing material selected from the group consisting of urea, monoisocyanate, alkyl substituted urea, or carbamate functional material and hydroxyl-containing glycol ether in an equivalence ratio of about 2:1 to 1:2.