An aqueous composition with a sediment content <5%, comprising a polyurethane dispersion wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt % of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of (a) <5 wt % of 1-methyl-2-pyrrolidinone by weight of the polyurethane, (b) at least one diluent and (c) water.