The organosilicon intermediate containing hydrophilic tertiary amines was synthesized from N-Methylmonoethanolamine (MEA) and (3-glycidyloxypropyl) trimethoxy silane (GPTMS), followed by neutralization with acetic acid (Ac). Meanwhile, a polyurethane (PU) prepolymer was prepared by sequentially polymerizing hexamethylene diisocyanate trimer (HT-100) with polyethylene glycol (PEG-600) and methoxy polyethylene glycol (MPEG), and then chain extended by the intermediate. Ultimately, methyl ethyl ketone oxime (MEKO) was selected to block the remaining NCO group, forming a branched polyisocyanate crosslinker. Subsequently, a linear polyisocyanate crosslinker was prepared in the same system by polymerizing hexamethylene diisocyanate (HDI) with the intermediate. Consequently, an organosilicon-modified waterborne blocked polyisocyanate crosslinker with a semi-interpenetrating network structure was obtained and further processed through hydrolysis to obtain the corresponding crosslinker containing silanol groups. The structure and thermal properties of the crosslinkers were analyzed using H NMR, FT-IR, TG, and DTG. Furthermore, the comprehensive mechanical properties of the cured films were investigated. The results indicate that the crosslinker system containing silanol groups exhibits superior performance. When the films' maximum adhesion and the wiping resistance were optimized at 1.97 MPa and 72 times, respectively, the impact resistance still maintained above 85 cm.

中文翻译：

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新型半互穿网络结构有机硅改性水性封端多异氰酸酯交联剂的合成与研究

以N-甲基单乙醇胺(MEA)和(3-缩水甘油氧基丙基)三甲氧基硅烷(GPTMS)为原料合成含有亲水性叔胺的有机硅中间体，然后用乙酸(Ac)中和。同时，通过将六亚甲基二异氰酸酯三聚体（HT-100）与聚乙二醇（PEG-600）和甲氧基聚乙二醇（MPEG）依次聚合制备聚氨酯（PU）预聚物，然后通过中间体进行扩链。最终，选择甲基乙基酮肟（MEKO）来封闭剩余的NCO基团，形成支化多异氰酸酯交联剂。随后，通过六亚甲基二异氰酸酯（HDI）与中间体的聚合，在同一体系中制备了线性多异氰酸酯交联剂。由此得到具有半互穿网络结构的有机硅改性水性封端多异氰酸酯交联剂，并进一步水解得到相应的含硅烷醇基交联剂。使用 H NMR、FT-IR、TG 和 DTG 分析了交联剂的结构和热性能。此外，还研究了固化膜的综合机械性能。结果表明，含有硅烷醇基团的交联剂体系表现出优异的性能。当薄膜的最大附着力和耐擦拭性分别优化为1.97 MPa和72次时，耐冲击性仍保持在85 cm以上。