METHOD FOR PRODUCING ONE-COMPONENT SEALING AND COATING COMPOUNDS WITH A POLYURETHANE BASE

摘要

The invention relates to a method for producing one-component sealing and coating compounds with a polyurethane base The inventive method provides a simpler means of production as well as guaranteeing improved storage stability of the compounds produced, and comprises the following steps: agitating a mixture of polyol components and one diisocyanate component to obtain an isocyanate prepolymer with a residual content of monomeric diisocyanate of 2 wt per ct; dispersing pigments and inorganic fillers in the mixture and adding a solvent whilst agitating, the residual content of monomeric diisocyanate reacting with the moisture provided by the fillers so as to obtain an H 2 O content of <0.01 wt per ct in the reaction mixture; adding an H 2 O-reactive latent hardener and optionally, at least one catalyst, and airtight packing of the resulting sealing and coating compound.