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以聚醚多元醇、聚酯多元醇和蓖麻油为混合多元醇,以改性MDI(4,4′-二苯基甲烷二异氰酸酯)及PAPI(多亚甲基多苯基多异氰酸酯)为混合异氰酸酯,合成了聚氨酯(PU)胶粘剂预聚体;然后以PA(羟基丙烯酸酯树脂)作为PU预聚体的改性剂,制得高固含量的PUA(聚丙烯酸酯改性聚氨酯)胶粘剂。结果表明:当m(改性MDI)∶m(PAPI)=1∶1、n(-NCO)∶n(-OH)=2.2∶1、w(PA)=8%(相对于PU质量而言)和w(丙烯酸羟乙酯)=3%(相对于PU质量而言)时,PUA胶粘剂的综合性能较好。
Using polyether polyols, polyester polyols and castor oil as mixed polyols, modified MDI (4,4’-diphenylmethane diisocyanate) and PAPI (poly-methylene polyphenyl polyisocyanate) (PU) prepolymer was synthesized. Then PA (hydroxy acrylate resin) was used as the modifier of PU prepolymer to prepare high solid PUA (polyacrylate modified polyurethane) adhesive. The results show that when m (modified MDI): m (PAPI) = 1: 1, n (-NCO): n (-OH) = 2.2: 1 and w (PA) = 8% ) And w (hydroxyethyl acrylate) = 3% (relative to PU mass), the overall performance of the PUA adhesive is better.