以异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二醇(PCDL)、2,2-二羟甲基丙酸(DMPA)、季戊四醇三丙烯酸酯(PETA)、异甘露醇(IMT)、1,4-丁二醇(BDO)和自制含氟二元醇(FDOH)为主要原料合成了异甘露醇改性水性含氟聚氨酯(WFPU-IMT)。采用红外光谱(ATR-FTIR)和核磁氢谱(1H-NMR)对其结构进行表征。探究了异甘露醇对涂膜的接触角、耐水性、透光率、热稳定性、力学性能等的影响,结果表明:水性含氟聚氨酯体系中引入异甘露醇,明显地改善了涂膜的耐水性和透光率,所制备涂膜的热稳定性和力学性能良好。当IMT含量为1.90%时,涂层厚度为3mm时,其在550nm处的透光率高达95%。
A fluorinated UV curable waterborne polyurethane was modified by isomannite(IMT) via copolymerization of isophorone diisocyanate(IPDI),polycarbonate glycol(PCDL),2,2-dimethylolpropionic acid(DMPA),pentaerythritol triacrylate(PETA),isomannite(IMT),1,4-butanediol and fluorinated diol as the main material.The structure of the cured coating was characterized by ATR-FTIR spectroscopy and 1H-NMR.The influence of different content of IMT on the contact angle,water resistance,optical transmittance,thermal resistance and mechanical property of the cured coating was also investigated.The results indicated that with the addition of IMT increased,the water resistance and transparency were obviously improved.Fluorinated UV curable waterborne polyurethane modified by isomannite(WFPU-IMT) displayed excellent thermal stability and tensile strength.When the content of IMT was 1.90%,the coating thickness was 3mm,the cured film showed transmittance at 550nm was as high as 95%.
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