Process for the production of polyurethanes using morpholine compounds as catalysts

Abstract

Abstract The invention relates to a process for the preparation of foamed or unfoamed polyurethanes by the reaction of compounds with molecular weights of 400 to 10,000 having at least two isocyanate-reactive hydrogen atoms with polyisocyanates in the presence of catalysts containing tertiary amino groups and optionally in the presence of chain-lengthening agents of molecular weight 32 to 400, foam stabilizers, water and/or organic blowing agents and optionally other auxiliary agents and additives, characterized in that the catalysts are morpholine derivatives of the general formula ##STR1## wherein X is an integer from 3 to 6 and R 1 and R 2 are identical or different and (a) represent a C 1 -C 6 -alkyl or C 6 -C 10 -cycloalkyl group or (b) form a heterocyclic ring containing 4-7 C-atoms, which heterocyclic ring may contain hetero groups in addition to the N-atom and wherein the additional hetero groups may be substituted by a C 1 -C 3 alkyl, or (c) together denote a group of the formula ##STR2## in which n and m are identical or different numbers from 2 to 4, preferably 2, or (d) represent ##STR3##

Inventors

• 👤 Peter Haas
• 👤 Hans-Albrecht Freitag

Bibliographic Details