Polyester polyurethane dispersion. In the formulation of stoving industrial coatings, stoving automotive primer surfaces and two-pack polyurethane primers and top coats for plastics. Properties / Applications: Bayhydrol® U 241 is a polyester polyurethane dispersion neutralized with dimethyl ethanol amine which is resistant to hydrolysis. The product can be diluted with water for application and shows no dilution anomalies. Bayhydrol® U 241 can be combined with partially methylated melamine resins to formulate water-dilutable stoving coatings and primers which cure at approx. 120 °C. The ratio of Bayhydrol® U 241 to the amino resin (calculated on the solvent-free resin) is usually 75 : 25 to 70 : 30. Because of the huge amount of commercial available amino resins, compatibility should always be tested. Information provided by Covestro |