Patent ID: 9156935
Filing Date: 2015-10-13
Classification: B01J,C08G,Y02P

Abstract:
1. A process for preparing a polyisocyanate-based polymer, comprising forming a reaction mixture containing at least one polyisocyanate, at least one isocyanate-reactive compound having at least two isocyanate-reactive groups and at least one zinc catalyst, and then curing the reaction mixture to form a polymer, wherein the zinc catalyst contains at least one zinc atom associated with a polydentate organic ligand that contains at least two complexing sites, of which at least one is nitrogen-containing, wherein the ligand is a β-amino alcohol or enol having either of structures II or IV wherein R 5 is a group that is bonded to the indicated nitrogen atom through a carbon, oxygen, nitrogen or silicon atom and each R 1 , R 2 and R 3 is independently hydrogen or a group that is bonded to the indicated carbon atom through a carbon, oxygen, nitrogen or silicon atom, provided that any two or more of R 1 , R 2 and R 3 may together form a divalent or trivalent group that is bonded to the indicated carbon atoms through carbon, oxygen, nitrogen and/or silicon atoms, R 4 is independently hydrogen or a group that is bonded to the indicated nitrogen atom through a carbon, oxygen, nitrogen or silicon atom, further provided that an R 4 group and an R 5 group may together form a divalent group that is bonded to the indicated nitrogen atom through carbon, oxygen, nitrogen and/or silicon atoms, and further provided that an R 3 and an R 5 group may together form a divalent group that is bonded to the indicated carbon atom and the indicated nitrogen atom though carbon, oxygen, nitrogen and/or silicon atoms.