A new curing agent for self-curable system of aqueous-based PU dispersion

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Title:	A new curing agent for self-curable system of aqueous-based PU dispersion
Authors:	Wang, Shih-Chieh;Chen, Po-Cheng;Yeh, Jen-taut;Chen, Kan-nan
Contributors:	淡江大學化學學系
Keywords:	Azetidine;Self-curing;Ring-opening;Aqueous-based PU
Date:	2007-04
Issue Date:	2009-11-04 16:59:12 (UTC+8)
Publisher:	Elsevier
Abstract:	Anionic aqueous-based polyurethane (PU) dispersion consists of carboxyl group that served as an internal emulsifier stabilizing aqueous PU dispersion and also a reactive site toward curing agent. A model reaction of a mono-azetidine-containing compound and trimethylacetic acid (TMAA) demonstrated that an amino ester bond formation between azetidine and carboxylic acid. A di-azetidine containing compound (HDDA–AZT) was prepared and served as a curing agent, which was synthesized by a Michael addition reaction of azetidine (AZT) to hexanediol diacrylate (HDDA). Anionic aqueous PU dispersion was treated with HDDA–AZT as a latent curing agent and becoming a self-curable aqueous PU system. A cross-linked PU resin was obtained from this self-curing PU system on drying at ambient temperature. The performance properties of these self-cured PU resins proved that cross-linking behaviors with this new curing agent, HDDA–AZT.
Relation:	Reactive and Functional Polymers 67(4), pp.299-311
DOI:	10.1016/j.reactfunctpolym.2007.01.002
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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