polyurethane non-silicone surfactant: enhancing waterborne pu dispersion stability introduction waterborne polyurethane (pu) dispersions have gained significant traction as environmentally friendly alternatives to solvent-based pu coatings, adhesives, and elastomers. the inherent versatility of pu chemistry allows for the creation of materials with a wide range of properties, including flexibility, durability, and chemical resistance. however, the stability...