首先利用聚醚多元醇、二苯基甲烷二异氰酸酯（ MDI ）等为原料制备端异氰酸酯聚氨酯预聚体（ NCO PU），然后加入邻苯二甲酸丁苄酯（BBP）、炭黑、CaO等原料制备湿固化聚氨酯密封胶（MSPUS）。研究不同异氰酸根与羟基的物质的量比（ R）对NCO PU红外谱图的影响，以及研究BBP用量和R值变化对MSPUS性能的影响。结果表明：红外谱图显示通过使用聚醚多元醇、MDI 等为原料成功制得了 NCO PU；当 R＝2?22、m （ BBP ）／m（ NCO PU）＝0?7时，MSPUS的性能最佳，拉伸强度达到7?27 MPa，断裂伸长率达到334％，剪切强度达到3?74 MPa，耐水性能良好，达到了汽车、建筑等行业的使用要求。
A series of moisture curing polyurethane adhesives(MSPUS) were synthesized by two steps. First, polyurethane prepolymer ( NCO?PU ) was prepared by polyether polyol and diphenyl methane diisocyanate( MDI) as raw materials. Then the MSPUS was prepared by butyl benzyl phthalate ( BBP ) , carbon black and calcium oxide,etc.The influence of different ratios of isocyanato and hydroxyl group(R) on Fourier transform infrared spectrometry ( FT?IR) of the NCO?PU was investigated in detail,and the influence of different R values and BBP content on the MSPUS properties was also studied.Results of FT?IR showed that MSPUS was fabricated by polyether polyol and MDI. In addition,when the R value was 2?22,and the m(BBP)/m(NCO?PU) was 0?7,MSPUS had excellent mechanical properties with tensile strength of 7?27 MPa, elongation at break of 334% and shear strength of 3?74 MPa, and good water resistance fully meeting the requirements of the automotive,construction and other industries.