为提高无机超薄膨胀型钢结构防火涂料的防火性能,参照熔体发泡法制备泡沫陶瓷的原理,将Bi系低熔点玻璃粉作为高温熔体添加到防火涂料中,达到高温条件下为涂料膨胀提供熔体,提高涂料的膨胀倍数,优化涂料的膨胀结构,提高涂料防火性能的目的。对添加低熔点玻璃粉防火涂料的阻燃效果、涂层结构、涂层质量热损失以及耐火时间进行分析测试。结果表明,掺加6%～8%的低熔点玻璃粉Bi₂O₃-B₂O₃-ZnO(325-390-435℃)可有效地改善防火涂层的膨胀结构和隔热性能,涂层的膨胀倍数达到10倍左右,耐火时间达到120min。热重分析表明,添加玻璃粉的防火涂料具有较高的稳定性,高温条件下残余率达77.34%。

In order to improve the fire performance of inorganic ultrathin expanded fire retardant coating,with reference the principle of foaming ceramic was prepared by melt foaming method.The glass powder with low melting point was added to the fireproof coating as high temperature melt,and the melt was provided for the expansion of coating at high temperature.Improved the expansion ratio of paint,optimized the expansion structure of paint and improved the fire resistance of coating.The flame retardant effect,coating structure,coating quality heat loss and fire resistance time were tested.The results of fire test showed that the addition of 6%～8% low melting point glass Bi₂O₃-B₂O₃-ZnO(325-390-435℃) can effectively improve the expansion structure and thermal insulation performance of coating.The expansion ratio of coating was about 10 times,the fire resistance time can reach more than 2h.The thermogravimetric analysis showed that the coating was able to guarantee 77.34% of residue at high temperatures to ensure the stability at high temperatures.