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Characterization and application of crosslinkers for polyurethane aqueous systems: Isopropylidene malonate‐blocked isocyanurate
Author(s) -
Mirčeva A.,
Žigon M.,
Malavašič T.
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070541309
Subject(s) - malonate , polyurethane , polymer chemistry , aqueous solution , fourier transform infrared spectroscopy , amide , adduct , curing (chemistry) , chemistry , materials science , organic chemistry , chemical engineering , engineering
An 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 & Sons, Inc.