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使用聚醚多元醇、自制交联剂、液化MDI等组份制备出一种配比为1∶1的快速固化道床用双组份聚氨酯喷涂树脂。研究结果表明使用聚醚1000作为主材,并加入适量的增塑剂DBP可以得到粘度适当的预聚体,当交联剂用量达到10质量份时,树脂固化后的物理性能比较理想,黏接强度达到0.39MPa,伸长率达到117%,剪切强度达到1.15MPa;使用辛酸亚锡与异辛酸铅一起作为催化剂使用,则可以得到良好的固化速度;该树脂已经在既有线上进行了喷涂试验,试验效果良好。
Using polyether polyol, self-made crosslinking agent, liquefied MDI and other components to prepare a 1: 1 ratio fast curing two-component polyurethane resin for road bed. The results show that the use of polyether 1000 as the main material, and adding the right amount of plasticizer DBP can get a suitable viscosity prepolymer, when the amount of crosslinking agent to 10 parts by mass, the physical properties of cured resin ideal, bonding The strength reaches 0.39 MPa, the elongation reaches 117% and the shear strength reaches 1.15 MPa. The use of stannous octoate together with lead isooctanoate gives a good cure rate; this resin has been sprayed on existing lines Test, the test effect is good.