New self-curable, aqueous-based polyurethane system by an isophorone diisocyanate/uretedione aziridinyl derivative process

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Title:	New self-curable, aqueous-based polyurethane system by an isophorone diisocyanate/uretedione aziridinyl derivative process
Authors:	Lai, Jian-zei;Ling, Hao-jan;Yeh, Jen-taut;Chen, Kan-nan
Contributors:	淡江大學化學學系
Keywords:	polyurethanes;uretedione;aziridine
Date:	2004-11-05
Issue Date:	2009-11-04 16:56:04 (UTC+8)
Publisher:	John Wiley & Sons
Abstract:	Uretedione aziridinyl derivative (UAD) was prepared through the dimerization of isophorone diisocyanate and the addition reaction of aziridine to its isocyanate (NCO) end groups. An NCO-terminated polyurethane (PU) prepolymer was prepared from the addition of isophorone diisocyanate, poly(propylene glycol)s, and dimethylolpropanic acid. A mixture of UAD with the PU prepolymer and its NCO terminal groups were hydrolyzed to form primary amino groups during a water dispersion process. Meanwhile, the uretedione group of UAD reacted with these primary amino groups in the aqueous phase. Then, these aziridine end groups of UAD became part of an aqueous-based PU and served as latent internal curing agents. The self-curable, aqueous-based PU system obtained with this new UAD process is a convenient alternative for improving the performance of aqueous-based PUs.
Relation:	Journal of Applied Polymer Science 94(3), pp.845-859
DOI:	10.1002/app.20691
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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