Premium
Introduction of covalently bonded phosphorus into aqueous‐based polyurethane system via postcuring reaction
Author(s) -
Wang TaZen,
Chen KanNan
Publication year - 1999
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(19991205)74:10<2499::aid-app19>3.0.co;2-4
Subject(s) - isophorone diisocyanate , polyurethane , aqueous solution , polypropylene glycol , polymer chemistry , curing (chemistry) , materials science , covalent bond , isocyanate , chemistry , organic chemistry , polyethylene glycol
Abstract Anionic aqueous‐based polyurethane (PU) dispersions were derived from a water dispersion process of carboxylic groups containing PU prepolymers together with a neutralization and a chain extension. These PU prepolymers were prepared from a conventional polyaddition of isophorone diisocyanate, polypropylene glycol‐1000, and dimethylolpropanic acid. A covalently bonded phosphorus was introduced into PU by a phosporus‐containing curing agent. A series of phosphorus and multi‐aziridinyl groups containing curing agents were synthesized for this purpose. Each of them served in a dual‐function capacity as a postcuring agent for the anionic aqueous‐based PU system. The resulting postcured PU exhibited improvements in its mechanical, physical, and thermal properties; furthermore, postcured PU synergistic flame inhibition was also observed due to the presence of nitrogen and phosphorus content in the process. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2499–2509, 1999