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以异氟尔酮二异氰酸酯(IPDI)、聚己内酯二醇(PCL1000)、三羟甲基丙烷(TMP)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、全氟烷基丙烯酸酯(FM)和2,2-二羟基甲基丁酸(DMBA)为反应单体,甲基丙烯酸缩水甘油酯(GMA)、己二酰肼(ADH)和双丙酮丙烯酰胺(DAAM)为交联剂,过硫酸钾(KPS)为引发剂,采用原位乳液聚合法,合成多重交联水性含氟聚氨酯-丙烯酸酯复合乳液(FPUA)。通过红外光谱分析、热失重分析、接触角测定等对FPUA进行表征。结果表明,有机氟链段成功地接枝到聚合物上,乳液在常温成膜时发生交联;引入有机氟和交联改性都使得聚氨酯-丙烯酸酯(PUA)热稳定性提高;当含氟量达到8%,交联剂使用量达到0.25%,达到优异的防水效果,水接触角达到119.19°。
(IPDI), PCL1000, TMP, MMA, BA, perfluoroalkyl (FM) and 2,2-dihydroxymethylbutyric acid (DMBA) were the reactive monomers, glycidyl methacrylate (GMA), adipic dihydrazide (ADH) and diacetone acrylamide The cross-linking agent and potassium persulfate (KPS) were used as initiator to synthesize multi-crosslinked waterborne fluorinated polyurethane-acrylate composite emulsion (FPUA) by in-situ emulsion polymerization. The FPUA was characterized by infrared spectroscopy, thermogravimetric analysis and contact angle measurement. The results showed that the organofluorine segments were grafted onto the polymer successfully and the emulsion crosslinked at room temperature. The introduction of organofluorine and crosslinking modification resulted in the improvement of the thermal stability of polyurethane-acrylate (PUA) Fluoride content reached 8%, crosslinking agent usage reached 0.25%, to achieve excellent waterproof effect, the water contact angle reached 119.19 °.