| abstract |
An aqueous, polymeric flooring agent, which is predominantly metal-free, containing (a) a polyurethane component, in which a polyol mixture was used, in which dehydrogenated castor oil was present as a component with a hydroxyl index of 90 to 130 mg KOH per gr. and (b) an emulsion polymer as a membrane component, which has the effect that a coating can be removed or removed using an acid or base, on the basis of (i) a first percentage in polymerizable units, which either contain an acid group or an amine group, with the action, that the polymer emulsion particles swell if they are treated with the polishing agent (including ammonia) containing amine groups or with an oxide and (ii) a second percentage in polymerizable units containing a functional group that enables covalent cross-linking of the polymer between cells, either by direct reaction between these crosslinked groups or by a covalent crosslinking agent which can react with these crosslinked groups and is present in the composition, where such covalent crosslinking between the polymer cells occurs either before or during deposition the film on the substrate. |