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采用聚醚多元醇、TDI、MOCA等制备了遇水膨胀聚氨酯后浇止水带,研究了聚醚配比、预聚体异氰酸根含量、填料加入量、以及止水带反复遇水膨胀等对止水带性能的影响;阐述了遇水膨胀聚氨酯后浇止水带的施工方法。实验结果表明实验最佳的配比为:聚醚TEP5∶聚醚TED28=80∶20;异氰酸根含量4.5%;轻质碳酸钙用量为15%;产品经地铁实际使用3年未出现漏水现象,效果良好。
Polyether polyols, TDI and MOCA were used to prepare water-swelling polyurethane water-repellent polyurethane tape. The effects of polyether ratio, prepolymer isocyanate content, filler loading and repeated water-swelling of water-stop tape were studied On the performance of the water stop; expounded the water-swelling polyurethane water stop after the construction method. The experimental results show that the best ratio of the experiment is: polyether TEP5: polyether TED28 = 80:20; isocyanate content 4.5%; light calcium carbonate dosage 15%; product did not leak after 3 years , Good effect.