作　　者： ; ; ; ;

机构地区： 华南理工大学化学与化工学院

出　　处： 《腐蚀科学与防护技术》 2005年第3期205-208,共4页

摘　　要： 以甲苯二异氰酸酯(TDI)、聚醚多元醇(N2 10 )、1,4 -丁二醇(BDO)、二羟甲基丙酸(DMPA)和环氧树脂等为主要原料制备了水性聚氨酯树脂。研究了体系R值(NCO/OH)、BDO含量、DMPA含量、环氧树脂(HY)含量、中和度等对分散液和涂膜性能的影响.结果表明:随着R值提高、BDO含量的增大,乳液涂膜硬度和拉伸强度增大,断裂伸长率下降,耐化学品性提高,适宜的R值为1.3～1.7;DMPA含量增加,分散液的稳定性、涂膜的硬度拉伸强度等性能得到提高,但涂膜的亲水性增加,耐水性降低;环氧树脂的加入显著地提高了涂膜的耐水性、耐化学品性、硬度和拉伸强度,其适宜的用量为8%～9% .还通过傅立叶红外光谱研究研分析了涂膜氢键化行为。 Water-borne polyurethane was prepared using isocyanate TDI, polyether(N210), 1,4-butanedio(BDO), diaminoethane(DMPA) and epoxy resin as main raw materials. The effects of R-value (NCO/OH), BDO content, epoxy resin level, neutralization degree on dispersion and coating performance were investigated. The results show that the tensile strength, water-resistance, chemical resistance and hardness of coating increase with the R-value, BDO content, and the modifying level of epoxy resin.The optimal R and epoxy level are in the ranges of 1.3～1.7 and 8～9% respectively.Increasing DMPA content would raise the dispersion stability, tensile strength and hardness of coatings, but decrease the film water resistance. Furthermore the reason of good properties was discussed by analyzing the hydrogen bong of coatings with FTIR.

关 键 词： 防腐涂料 环氧树脂 水性聚氨酯树脂 涂膜性能

领　　域： [化学工程]