以聚己内酯二元醇（CAPA）为软缎,甲苯二异氰酸酯（TDI）为硬段,二羟甲基丙酸（DMPA）为亲水单体,采用自乳化法制备了水性聚氨酯乳液,并用此聚氨酯乳液与羧基丁苯胶（XSBRL）以及外加交联剂氮丙啶（aziridine）进行复配制得水性聚氨酯/羧基丁苯胶复合乳液。实验研究了此复合乳液对纸张的表面施胶性能,并优化了合成工艺条件。研究表明,当n能,并且氮丙啶的加入能进一步提高纸张的表面强度和耐折度。
A series of anionic waterborne polyurethane emulsion were successfully prepared by the reaction of polycaprolactone diols（CAPA）,toluene diisocyanate（TDI）,dimethylolpropionic acid（DMPA）.A kind of waterborne polyurethane/carboxylated styrene-butadiene rubberletex compound latex was synthesized by polyurethane,carboxylated styrene-butadiene rubberletex and aziridine as crosslinker.The factors affecting its synthetic condition were discussed,and the synthetic process was optimized.The results show that the compound emulsion owns excellent sizing property when n（TDI）∶n（CAPA）=1.4,m（DMPA）=6%,m（PU）/m（XSBRL）=2/1,m（aziridine）=2%.The papers＇ sizing value can reach 30s,folding endurance reach 86 times and surface strength reach 2.5m/s with 0.5% compound emulsion addition.And the polymer was characterized with TG and DLLS.
参考文献
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| [2] | Yan-yan Wei;Ying-wu Luo;Bao-fang Li .Polyurethane acrylate microgel synthesized by emulsion polymerization using unsaturated self-emulsified polymer[J].Colloid and polymer science,2006(10):1171-1178. |
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