Waterborne Parquet Coatings Based on Crosslinked Polyurethane Dispersions
The characteristic feature of polyurethanes is their chain structure of hard and soft segments. The hard segments have a large number of urethane groups that crosslink physically through the formation of hydrogen bridges. While the hard segments can form crystalline structures, the soft segments are comparatively mobile. From the combination of these attributes in the same molecule, the tough but flexible property profile of polyurethane coatings is achieved.
Despite the advantages of waterborne polyurethane coatings based on polyurethane dispersions (PUDs) for parquet floor coating application, there are some shortcomings about current commercially available systems.