Abstract: ［Objective］In order to enhance the sound insulation performance of waterborne coatings.［Methods］ A wide-temperature-domain sound-insulating composite was prepared via aphysical blending modification method，using waterborne polyurethane（WPU）as the matrix，hindered phenolic filler as the damping matrix element，and inorganic flake filler as the sound insulation matrixelement. The dispersion of the fillers was analyzed by scanning electron microscopy，and the prepared composites were analyzed by infrared spectroscopy，dynamic mechanical analysis and acoustic impedance test for damping and sound insulation properties.［Results］ The dispersion of fillers inWPU was successfully improved by high-temperature stirring after ball milling，and the effective damping temperature range（tan δ>0. 3）of the ternary aqueous acoustic damping composites preparedby adding 60% hindered phenol AO-60 and 30% lamellar black mica to WPU was widened to -7 ℃ compared with that of the pure WPU at 30 ℃，and the noise reduction effect reached 30 dB.［Conclusion］The dual-filler system provided a new technological path for the development of multi-functional and eco-friendly soundproof coatings，which was expected to achieve wider application in the fields of architectural and industrial coatings.

Key words: WPU, hindered phenol, black mica, damping, noise reduction

摘要： 【目的】提升水性涂料的隔声性能。【方法】选择水性聚氨酯（ WPU）为基体、受阻酚填料为阻尼基元、无机片状填料为隔音基元，采用物理共混改性方法制备了一种宽温域阻尼隔音复合材料。通过扫描电子显微镜对填料的分散性进行分析，并通过红外光谱、动态力学分析和声阻抗测试对制备的复合材料阻尼性能和隔音性能进行分析。【结果】通过球磨后高温搅拌方式成功提高了填料在 WPU中的分散性，当 WPU中添加 60%受阻酚 AO-60和 30%片状黑云母制备的三元水性隔音阻尼复合材料有效阻尼温域（ tanδ>0. 3）下限较纯 WPU的 30 ℃拓宽至 .7 ℃，降噪效果达到了 30 dB。【结论】双填料体系为开发多功能环保隔声涂料提供了新的技术路径，有望在建筑涂料和工业涂料领域取得更广泛的应用。

关键词: 水性聚氨酯, 受阻酚, 黑云母, 阻尼, 降噪

CLC Number: 

• TQ637