建筑EPS板上PVA基阻燃涂料制备及性能分析

Preparation and Performance Analysis of PVa-based Flame Retardant Coatings on Building EPS Boards

为了提高建筑防火性能,在建筑EPS板上设计了一种PVA基阻燃涂料,并开展性能实验测试分析。研究结果表明:氮气环境中主要形成了二氧化碳与水蒸气两种产物,到800℃时残留质量分数比例为18.5%。EPS达到了较小LOI值,并不具备良好的阻燃性,会在燃烧过程中形成熔融以及大量黑烟;对EPS/PKC2A3测试LOI值为36.2%,经UL-94垂直燃烧测试判断为V0级别,由此可以推断PKA涂料能够对EPS阻燃性能起到良好改善效果。相对于EPS/PKA残炭微观形貌,经过CCT处理的EPS/PKC2A3形成了连续致密的表面结构,抑制了内部成分、热量等的传递过程。该研究对建筑化工材料阻燃性能的提高具有很好的实际应用效果,易于推广开来。

In order to improve the fire protection performance of buildings,a PVa-based flame retardant coating was designed on the EPS board of buildings,and its performance was tested and analyzed.The results show that carbon dioxide and water vapor are mainly formed in the nitrogen environment,and the residual ratio is 18.5% at 800 ℃.EPS reaches a small LOI value,does not have good flame retardancy,will form melting and a lot of black smoke in the combustion process.The LOI value of EPS/PKC2A3 test was 36.2%,and the UL-94vertical combustion test judged it to be V0.It can be inferred that PKA coating can improve the flame retardancy of EPS.Compared with the microstructure of EPS/PKA residue,CCT-treated EPS/PKC2A3 formed a continuous and dense surface structure,which inhibited the internal composition and heat transfer process.The research has a good practical effect on the improvement of flame retardancy of building chemical materials and is easy to be popularized.