Premium
Self‐curing behaviors of single pack aqueous‐based polyurethane system
Author(s) -
Chen GuanNan,
Chen KanNan
Publication year - 1997
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/(sici)1097-4628(19970321)63:12<1609::aid-app12>3.0.co;2-v
Subject(s) - polyurethane , aqueous solution , curing (chemistry) , formic acid , materials science , chemical engineering , polymer chemistry , thermal analysis , composite material , nuclear chemistry , chemistry , thermal , organic chemistry , physics , meteorology , engineering
A di‐ or triaziridinyl compound served as the latent curing agent for the prepared carboxylic groups containing aqueous‐based polyurethane (PU) dispersions. It was formulated as a single pack self‐curable aqueous‐based PU system. This system was stable under an alkaline environment and its curing reaction could be initiated by a pH control. A model reaction between a monoaziridinyl compound and formic acid was demonstrated and identified by infrared spectrophotometry. The stabilities of this convenient one‐package PU system with a different dosage of di‐ or triaziridinyl latent curing agent were monitored by a particle sizer and fluorescence spectroscopy. The PU films were cast and self‐cured from these single pack PU dispersions at ambient temperature. The physical and mechanical properties as well as thermal behaviors of each self‐cured PU were evaluated. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 1609–1623, 1997