WATER-DISPERSIBLE UNSATURATED POLYURETHANE

摘要

A water-dispersible unsaturated polyurethane comprising pendant unsaturated alkyl groups, pendant sulphonic acid salt groups and pendant alkoxy polyoxyalkylene groups is described. The sulphonic acid salt groups and alkoxy polyoxyalkylene groups are present in amounts at least sufficient to render the unsaturated polyurethane water dispersible. The unsaturated polyurethane is especially suited for dispersing alkyds in water. Also disclosed is a composite latex comprising an aqueous alkyd dispersion and monoethylenically unsaturated monomers and a pigment dispersion comprising a pigment or pigment paste and the unsaturated polyurethane.