| abstract |
The invention relates to a process for the production of cell-containing or compact polyurethane-polyurea moldings with improved mold release properties by reacting a) organic polyisocyanates, b) higher molecular weight compounds with at least two reactive hydrogen atoms, c) aromatic diamines and optionally, d) further chain extenders and / or crosslinkers in the presence of an e) internal mold release agent consisting of A) a mixture of i) 5 to 80 parts by weight of at least one organic amine and / or cyclic lactam, ii) 20 to 95 parts by weight of at least one metal salt of stearin - and / or isostearic acid and iii) O to 5 parts by weight of a metal salt of an organic mono- and / or dicarboxylic acid and B) O, 1 to 2OO wt .-%, based on the total weight of the mixture (A), at least one organic mono- and / or dicarboxylic acid or their anhydrides f) catalysts and optionally, g) blowing agents, h) auxiliaries and / or additives Etching materials as one shot systems according to the reaction injection molding technique in closed molds as well as the internal mold release agents and their use for the polyisocyanate polyaddition process. |