| 摘要 |
FIELD: chemistry.SUBSTANCE: present invention relates to methods of producing polymers from polyisocyanates and isocyanate-reactive substances. The invention can particularly be used to produce moulded polyurethane elastomers. Described method of producing a polyisocyanate-based polymer, which includes preparing a reaction mixture containing at least one polyisocyanate, at least one polyol and at least one zinc catalyst, followed by curing the reaction mixture to form a polymer, where the zinc catalyst contains at least one zinc atom bonded to a polydentate organic ligand containing at least two complexing centres, at least one of which is nitrogen-containing, where the ligand compound is a) ?-amino-alcohol or enol; b) ?-imino-alcohol or enol; c) ?-enamino alcohol; d) ?-aminoketo-compound, or ?-enaminoketo-compound, or an ester compound; e) ?-diketiminate compound; f) ?-diamine compound.EFFECT: zinc catalysts provide the required properties of organomercury catalysts, including a long period of open storage with subsequent fast curing, good physical properties and a good appearance of the surface of the elastomer product.19 cl, 1 tbl, 17 ex |
