| 摘要 |
<p>Aqueous, polymeric floor coating agent that is substantially free from metal salts, containing a) a polyurethane component in the production of which a polyol mixture has been used in which partially dehydrated castor oil with a hydroxyl number of 90 to 130 mg KOH per g of substance is present as a constituent, and b) an emulsion polymer as film-forming component, the effect of which is that a resulting coating can be removed or stripped off by using an acid or alkali, based on i) a first portion of polymerized units that contain either an acid group or an amino group, having the effect that the particles of the emulsion polymer swell when treated with an amine group-containing polish remover (including ammonia) or with an acidic polish remover, and ii) a second portion of polymerized units that contain a functional group that permits an inter-molecular, covalent crosslinking of the polymer, either by direct reaction between these crosslinking groups or by means of a covalently crosslinking agent that can react with these crosslinking groups and is present in the composition, wherein such an inter-molecular covalent crosslinking of the polymer taking place either before or during the deposition of the film on the substrate.</p> |
