| abstract |
The present invention provides aqueous compositions for use in flooring wood joinery, especially for outdoor use, comprising (a) one or more dihydrazide compounds in a total amount of 0.5 to 4% by weight, based on total weight. solids of the composition and (b) one or more multiphase aqueous emulsion copolymers containing, as (i) a first phase, an emulsion copolymer having a glass transition temperature (tg) by differential scanning calorimetry (dsc) of -50 to 30 ° C, and containing, in copolymerized form, one or more monoethylenically unsaturated phosphoric acid monomers and one or more keto group-containing amide monomers, and, as (ii) a second phase, an emulsion copolymer having a dsc tg is at least 50 ° C to 125 ° C, wherein the weight ratio of (i) from the first phase to (ii) the second phase, based on copolymer solids, ranging from 50:50 to 90:10. |