Aqueous compositions comprising a blend of emulsion copolymers

An aqueous composition comprising:

• a. a plurality of polymer particles (A) comprising one or more copolymer, pA, having weight average molecular weight greater than 100,000 and a glass transition temperature, Tg, of 20° C. or higher, as measured by differential scanning calorimetry, DSC;
• b. a plurality of polymer particles (B) comprising one or more copolymer, pB, having weight average molecular weight greater than 5,000 and a glass transition temperature, Tg, as measured by differential scanning calorimetry, DSC, at least 15° C. lower than the Tg of pA;
• and
• c. one or more additive to improve film formation chosen from:
• a coalescent having a normal boiling point no greater than 300° C. present in an amount of at least 4%, based on the total weight of solids of the copolymers pA and pB, a naturally derived plasticizer present in an amount of at least 0.5%, based on the total weight of solids of the copolymers pA and pB, and mixtures thereof;
• wherein the weight ratio of the copolymer solids of pA to the copolymer solids of pB is from 65/35 to 90/10, and
• further wherein said composition, when dried under ambient conditions, forms a film upon evaporation of water.