Abstract: The invention relates to the synthesis of a carboxyl-functional, unsaturated polyurethane containing a perfluoropolyether block, which can be used as an easy clean additive in preparation of a waterborne, UV curable coating composition. The polyurethane can be prepared by a method comprising the following steps: a) subjecting a hydroxy-terminated perfluoropolyether A to a reaction with a molar excess of polyisocyanate B to obtain an isocyanate-functional urethane C, b) adding a carboxyl-functional polyol D to the reaction mixture, c) adding OH— functional (meth)acrylate monomer E to the reaction mixture, wherein steps (b) and (c) can be performed in any order, and d) neutralizing the reaction product with a neutralizer F. The resulting coating has easy clean and anti-stain properties.

Abstract: The invention relates to an aqueous dispersion containing a mixture of linear fluorinated and non-fluorinated polyurethane acrylates, obtainable by: a) reacting polyisocyanate A?, multi-unsaturated OH-functional compound B?, acid-functional polyol C? under urethane formation reaction conditions in the presence of intermediate X, wherein intermediate X is an OH-functional (per)fluoropolyether (PFPE) derivative, and b) adding neutralizer D to the reaction product of step a) and dispersing it in water. The dispersion can be used in preparation of a coating with easy-clean, anti-stain and anti-scratch properties, which can advantageously be used for coating substrates in consumer electronics or automotive applications.