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Aromatic poly(fluorocarbinol)s: Soluble, hydrophobic binders for inkjet formulations
Progress in Organic Coatings ( IF 6.6 ) Pub Date : 2021-06-10 , DOI: 10.1016/j.porgcoat.2021.106378
Jessica Godleman , Flavien Leroux , Stuart Reynolds , Julian Philpott , Philippa B. Cranwell , Josephine L. Harries , Wayne Hayes , Howard M. Colquhoun

Aromatic poly(fluorocarbinol)s with molecular weights (Mn) in the range 11,000–115,000 g mol−1 have been synthesised and their potential as polymeric binders in ink formulations for deposition by continuous inkjet (CIJ) printers investigated. A small scale, proof of concept study, using a drop-on-demand inkjet printer, suggested that the three lowest molecular weight polymers (Mn = 11,500–25,200 g mol−1) could behave as very good binders in this type of application. Two of these poly(fluorocarbinol)s (Mn = 11,500 and 25,200 g mol−1) were analysed as MEK solutions, pre-deposition, using shear-flow rheology. The lower-MW material exhibited Newtonian fluid characteristics whereas the higher-MW polymer behaved as a non-Newtonian fluid. For CIJ printing, both polymers were formulated in MEK using Orasol Orange®, an ionic cobalt dye-complex, to visualise the prints and provide a charge for deflection of ink droplets. The resulting solutions were deposited successfully on a variety of different packaging substrates using a CIJ printhead, resulting in high-resolution printed code. Magnified views of the jetstream during printing showed well-defined droplet formation without any evident satellite drops. These polymeric binders showed limited adhesion to low density poly(ethylene) (LDPE) and polypropylene (PP) surfaces, but moderately good adhesion to steel and excellent adhesion to poly(ethylene terephthalate) (PET), nylon-6,6 and glass. Contact angle measurements on drawn-down films of these poly(fluorocarbinol)s showed that, despite their ready solubility in high-polarity solvents such as alcohols and ketones, poly(fluorocarbinol)s afford coatings with relatively hydrophobic surfaces (water contact angles ca. 90°). Such polymers thus appear to be excellent candidates for binders in inkjet formulations, with materials having Mn in the range 10,000 to 25,000 g mol−1 displaying properties that are very well suited to use in continuous inkjet deposition for coding and marking on an industrial scale.



中文翻译:

芳香族聚(氟甲醇):用于喷墨配方的可溶性疏水性粘合剂

已经合成了分子量 ( M n ) 范围为 11,000–115,000 g mol -1 的芳香族聚(氟代甲醇),并研究了它们作为用于连续喷墨 (CIJ) 打印机沉积的油墨配方中的聚合物粘合剂的潜力。使用按需喷墨打印机进行的小规模概念验证研究表明,三种最低分子量的聚合物 ( M n  = 11,500–25,200 g mol -1 ) 在此类应用中可以作为非常好的粘合剂. 这些聚(氟 甲醇)中的两种(M n = 11,500 和 25,200 g mol -1) 被分析为 MEK 溶液,预沉积,使用剪切流流变学。低 MW 材料表现出牛顿流体特性,而高 MW 聚合物表现为非牛顿流体。对于 CIJ 印刷,两种聚合物均使用 Orasol Orange®(一种离子钴染料复合物)在 MEK 中配制,以显示印刷品并为墨滴偏转提供电荷。使用 CIJ 打印头将所得溶液成功沉积在各种不同的包装基材上,从而产生高分辨率的打印代码。打印过程中喷射流的放大视图显示出清晰的液滴形成,没有任何明显的卫星液滴。这些聚合物粘合剂对低密度聚(乙烯)(LDPE)和聚丙烯(PP)表面的附着力有限,但对钢具有中等良好的附着力,对聚对苯二甲酸乙二醇酯 (PET)、尼龙 6,6 和玻璃具有出色的附着力。对这些聚(氟代甲醇)的拉伸薄膜的接触角测量表明,尽管它们在高极性溶剂(如醇和酮)中很容易溶解,但聚(氟代甲醇)提供具有相对疏水表面的涂层(水接触角约90°)。因此,此类聚合物似乎是喷墨配方中粘合剂的极好候选物,材料具有M n范围为 10,000 至 25,000 g mol -1 ,显示出非常适合用于工业规模编码和标记的连续喷墨沉积的特性。

更新日期:2021-06-10
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