| 摘要 |
The invention describes thermocurable mixtures which have a long shelf life at room temperature and contain surface-modified polyisocyanates and compounds containing at least two hydrogen atoms which are reactive toward isocyanate groups. In the mixture, the polyisocyanates are in the form of discrete particles in the compound containing reactive hydrogen atoms, the polyisocyanate particles being deactivated on their surface, to the extent of from 0.1 to 20 equivalent percent of the isocyanate groups present, by means of a reaction product prepared from one mole of preferably one aliphatic, cycloaliphatic and/or aromatic diamine having 2 to 32 carbon atoms and 1.5 to 2.5 mol of an organic monocarboxylic acid or an anhydride thereof having at least 6 carbon atoms or an aryl sulphonic acid. The mixtures are used, in particular, for the production of urethane- and/or urea-containing films. |
