Meister Lackierer Practice Questions - Meisterprüfung Lackierer (Austria) Exam

The 1K physically dried film will dissolve or swell because its polymer chains are held only by secondary intermolecular forces, whereas the 2K crosslinked network remains resistant due to covalent bonds The 1K film remains completely insoluble because solvent evaporation creates irreversible crystalline structures, whereas the 2K film easily hydrolyzes in organic solvents Both coatings possess identical solvent resistance because curing temperature is the sole factor that determines polymer insolubility The 2K clearcoat will dissolve rapidly because isocyanate bonds are unstable in the presence of ketones, while 1K films are impervious to all organic thinners