Room temperature catalyst suitable for use in polyurethane compositions comprising the reaction product of a titanium, zirconium, hafnium or aluminium orthoester and a beta-diketone or beta-ketoester and a complexing agent such as a mercapto compound

摘要

his catalyst, which is suitable for use in polyurethane compositions, comprises the reaction product of: (a)the reaction product of a titanium, zirconium, hafnium or aluminium orthoester and a 'beta'-diketone or 'beta'-ketoester and ( (b)a complexing agent selected from a mercapto compound, an oxazolidine or a tetrahydro-oxazine. The catalyst is particularly useful for preparing coating compositions which have a long pot life and can be cured at room temperature.