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    题名: A cross self-curing system for an aqueous-based PU hybrid
    作者: Lai, Jian-zei;Chen, Pao-jan;Yeh, Jen-taut;Chen, Kan-nan
    贡献者: 淡江大學化學學系
    关键词: self-curing;PU hybrid;aziridine
    日期: 2005-07-15
    上传时间: 2009-11-04 16:56:41 (UTC+8)
    出版者: John Wiley & Sons
    摘要: Isocyanate (NCO)-terminated polyurethane (PU) prepolymer comprises carboxylic acid, which is obtained from a conventional PU preparation procedure. Aziridine-terminated PU oligomer is prepared by an addition reaction of aziridine to NCO-terminated PU prepolymer after it is neutralized with triethylamine. This PU oligomer is then dispersed with water and becomes a single-component self-curable aqueous-based PU dispersion (PU-AZ). PU carboxyl groups are not only the ionic centers stabilizing the aqueous polymer dispersion, but also serve as PU curing sites toward the curing reaction with its aziridine terminal groups on drying. This self-curable PU-AZ dispersion is miscible and compatible with other carboxyl groups containing aqueous-based PU dispersion in any ratio, which results in a cross self-cured PU hybrid formation on drying. This cross self-cured PU hybridization process allows property modification and the curing of PU simultaneously without the addition of any external curing agent.
    關聯: Journal of Applied Polymer Science 97(2), pp.550-558
    DOI: 10.1002/app.21774
    显示于类别:[化學學系暨研究所] 期刊論文

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