A new tri‐functional azetidine compound for self‐curing aqueous‐based PU system |
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| Authors: | Shih‐Chieh Wang Po‐Chen Chen Jing‐Zhong Hwang Chi‐Yuan Huang Jen‐Taut Yeh Kan‐Nan Chen |
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| Affiliation: | 1. Department of Chemistry, Nano‐tech Research Center, Tamkang University, Tamsui, Taiwan 251;2. Department of Materials Engineering, Tatung University, Taipei, Taiwan 104;3. Graduate Institute of Polymer Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 106;4. Faculty of Chemistry and Material Science, Hubei University, Wuhan, China |
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| Abstract: | A mono‐azetidine compound had been demonstrating a ring opening reaction with carboxylic acid (e.g., trimethylacetic acid, TMAA) and that resulted in an amino ester bond formation at ambient temperature. A triazetidine compound (trimethylolpropane tris(1‐azetidinyl)propionate, TMPTA‐AZT) was obtained via Michael addition of azetidine (AZT) to trimethylolpropane triacrylate (TMPTA). The carboxylic groups of anionic aqueous‐based polyurethanes (PU) served as internal emulsifier, which stabilized PU dispersion and also served as PU curing sites. The triazetidine compound (TMPTA‐AZT) was introduced into anionic aqueous‐based PU dispersion as a new latent curing agent and that mixture became a single‐component self‐curable aqueous PU system. A crosslinked PU film was obtained from this PU system on drying at ambient temperature. The final polymer performance properties demonstrated the crosslinking behaviors of this new curing agent, TMPTA‐AZT, with carboxylic ion‐containing aqueous‐based PU resins. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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| Keywords: | self‐curing azetidine ring‐opening aqueous‐based PU Michael addition |
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