Cleaner by design

A study was carried out to test five polyurethane topcoat formulations to see how easily the substances used to create graffiti could be removed from them. The formulations were first applied to a test area by roller to a dry film thickness of 75 micrometers. Binders and hardeners that have proved themselves, among other applications, in anti-graffiti coatings for railway stock and other large vehicles, were then used in waterborne formulations. Waterborne two-component polyurethane systems are also used to seal floor coatings. In the past, first-generation products still showed weaknesses in their mechanical and chemical resistance. Extensive tests and practical experience from the last few years have shown that these demands can be satisfied with waterborne two-component polyurethane systems.