Characterization and application of crosslinkers for polyurethane aqueous systems: Isopropylidene malonate‐blocked isocyanurate

摘要

AbstractAn adduct of hexamethylene isocyanurate and isopropylidene malonate was prepared and tested as a crosslinker in a one‐pack water‐borne polyurethane system. It was characterized by FTIR, NMR, and SEC; the blocking and curing courses were followed by FTIR and DSC. The crosslinker was a mixture of various oligomers having mainly amide‐type linkages. The cure analysis showed that cleavage of the malonate ring started at around 110°C and was followed by the formation of ester‐type products. After 30 min of heating at 130°C the insoluble part of crosslinked polyurethane films exceeded 80. © 1994 John Wiley