紫外光固化水性聚氨酯丙烯酸酯黏合剂的印花性能

为研究UV光固化对涂料印花性能的影响，以异佛尔酮二异氰酸酯（IPDI）和聚乙二醇（PEG400）为主要原料合成聚氨酯，用季戊四醇三丙烯酸酯（PETA）作为封端剂，合成聚氨酯丙烯酸酯(PUA)，运用红外光谱仪对合成产物结构进行表征。将聚氨酯丙烯酸酯，单体和光引发剂混合，应用到涂料印花中，通过紫外光照射对织物进行固色。探究各组分含量及紫外光照时间对印花织物牢度、K/S值、手感和印花图案清晰度的影响。研究表明，采用25% PUA，6%单体，5%光引发剂，光固化60 s，印花织物水洗牢度可达5级，干摩擦牢度可达4-5级，湿摩擦牢度可达3级，印花图案清晰度优良。

Printing performance of UV curable waterborne polyurethane acrylate adhesive

In order to study the effect of UV curing on the printing performance, polyurethane was synthesized from isophoronediisocyanate and polyethylene glycol as the main raw material, then the pentaerythritol triacrylate was employed as blocking agent to synthesis polyurethane acrylate（PUA）. The structure of PUA was analyzed by FTIR. The PUA, monomer and photoinitiator were mixed and then applied in fixation of pigment printing via UV irradiation. The effects of component content and UV irradiation time on the printing fabric fastness, K/S value, hand feeling and the printed pattern definition were studied. It indicated that under the condition of 25% PUA, 6% monomer, 5% photoinitiator, UV irradiation 60 s, the washing fastness, dry and wet rubbing fastness of printed fabric can reach 5 grade, 4-5 grade and 3 grade, respectively. The printing patterns also show excellent definition.