| 摘要 |
The invention provides a compound suitable for use as a catalyst for the formation of urethanes and ureas comprising the reaction product of (i) an alkoxide, condensed alkoxide or halo-alkoxide of titanium zirconium, hafnium or aluminium or a mixture thereof, and (ii) a complexing compound selected from the list comprising oximes, hydroxy-Schiff bases, 8-hydroxyquinoline derivatives, 10-hydroxybenzo-[h]-quinoline derivatives, hydrazones and substituted phenols. |
