Patent ID: 8653180

Claim:
An aqueous composition comprising a coalescent and a stable aqueous dispersion of a soft polyurethane and a hard polymer; wherein the hard polymer has a T g of at least 30° C. and the soft polyurethane has a T g in the range of 0 to −100° C.; wherein the soft polyurethane comprises at least 40% by weight of: a) units of a polyether polyol having a weight average molecular weight of from 1000 to 3000 Daltons and/or b) units of a polyester polyol, a polycaprolactam polyol, or a polycarbonate polyol, or a combination thereof having a weight average molecular weight of from 1500 to 3000 Daltons; wherein the solids weight percent of the hard polymer is from 65% to 85%; and the solids weight percent of the soft polyurethane is from 35 to 15%, each based on the solid weight of the hard polymer and the soft polyurethane wherein the coalescent has a boiling point in the range of 150° C. to 300° C. and is present in the composition at 4 to 25 weight percent based on the weight of the hard and soft polymers.