Synthesis of core–shell acrylic–polyure thane hybrid latex as binder of aqueous pigment inks for digital inkjet printing |
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作者姓名: | Jingfang Zhang Xuefeng Li Xinhao Shi Mei Hu Xingping Zhou Xiaqin Wang |
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摘 要: | Acrylic–polyurethane (PUA) hybrid aqueous emulsion with core–shell structure was prepared via semibatch emulsion copolymerization of the acrylate monomers (AC) in the presence of a commercial polyurethane dispersion as seeds. The core–shell structure of the emulsion was observed by TEM. The particle size and distribution of the emulsion was found to vary d rastically with the core–shell ratio. The thermal response properties of emulsion film swere measured by DSC, and the results indicated the good compatibility between PA and PU moieties in PUA hybrids. The chemical structures of emulsion films were studied by FTIR, and the surface p roperties were tested by contact angle measurement. The results supported the idea that the surface of the cast films was rich in polyurethane component. The water resistance o f the cast films became better by increasing the AC fraction. The
rheological properties of the latex and its utilization as a binder for aqueous pigment inks of digital inkjet printing were thoroughly investigated , indicating that the prepared hybrid emulsion could be used safely for aqueous pigment inks of digital ink jet printing.
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关 键 词: | Core–shell structure PUA hybrid emulsion Latex ink binder Rheological properties |
收稿时间: | 15 October 2011 |
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