Study on Preparation of Constrained Layer of Sprayable Constrained Damping Coating
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摘要: 为制备出可喷涂的环氧约束层涂料,通过多种配方设计,探讨了环氧树脂种类、固化剂种类、活性稀释剂种类及用量、阻燃剂种类及用量等因素对约束层弯曲模量、黏度、阻燃性的影响。结果表明,选用海因环氧树脂HY070复配环氧树脂128、酚醛胺固化剂T31复配腰果酚改性酚醛胺1102、以苄基缩水甘油醚692为活性稀释剂、以Al (OH)3为阻燃剂制备的约束层综合性能最优。替换现有刮涂型约束层,结合相同阻尼层,进行复合损耗因子测试,整体温域复合损耗因子均升高。Abstract: A variety of formulas are designed to prepare sprayable epoxy constrained layer coatings. The effects of epoxy resin and curing agent types and the types and dosages of reactive diluents and flame retardants on the bending modulus, viscosity and fire resistance of the constraining layers are investigated. The results show that with the formula of hydantoin epoxy resin HY070 compounding 128 epoxy resin, the phenalkamine curing agent T31 compounding cardanol modified phenalkamine 1102, benzyl glycidyl ether 692 as the active diluents and aluminum hydroxide as the flame retardant, the constrained layer has the best overall performance. The composite loss factor is tested by combining the obtained constrained layer and the existing damping layer, and the result shows that the composite loss factor of the overall temperature domain rises.
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Key words:
- epoxy resin /
- curing agent /
- reactive diluents /
- flame retardant
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