Process for the preparation of molded parts of polyurethane or polyurethane-polyurea employing monocyclic amidines

摘要

The invention relates to a process for the preparation of polyurethane or polyurethane-polyurea molded parts by reacting organic polyisocyanates, polyols and chain extenders in the presence of monocyclic amidines having the formula as catalyst or catalyst mixtures of monocyclic amidines having the formula (I) and (a) tertiary amines, (b) metal salts having the formula Me XnYm (II), and/or (c) optionally-substituted aliphatic carboxylic acids. R1 and R2, Me, X, Y, n, and m are defined herein.