POLYALDIMINES OF OLIGOMERIC AMINOBENZOIC ACID DERIVATIVES, AND THEIR USE FOR PREPARATION OF MOISTURE-CURABLE, STORAGE-STABLE, ONE-PART POLYREAS

摘要

The present invention relates to new polyaldimines that are stable either per se or in a mixture with aromatic polyisocyanates. However, when exposed to moisture the polyaldimines readily generate polyamines upon hydrolysis. Moisture curable one part polyurea compositions, which may be used for preparing polyurea elastomers, adhesives, or coatings, were prepared from the new polyaldimines and organic polyisocyanates. These compositions have good storage stability and are rapidly tempered by water or atmospheric moisture. Cured compositions give polyurea resins having good physicochemical properties. The present invention also relates to a process for the preparation of polyaldimines by reaction of olygomeric aminobenzoic acid esters or amides and aldehydes.