木质素废旧聚氨酯制备轻型阻燃保温材料试验

按配比加入酚醛树脂、阻燃剂、发泡剂、乳化剂、碱木质素、液化废旧聚氨酯,制成木质素废旧聚氨酯.试验结果表明:随着固化剂的增加,固化时间缩短,表观密度增加,抗压强度增强,泡沫质量较好;加入次磷酸铝和二乙基次磷酸铝能明显改善酚醛树脂的阻燃性,加入5 g次磷酸铝和二乙基次磷酸铝时效果最好.这种轻型阻燃保温材料具有酚醛树脂泡沫的优点,同时由于添加了木质素提高了阻燃性.采用废旧聚氨酯作为添加成分,可以大大减少生产成本,保护环境,提高了资源的利用率.

Light Flame Retardant Insulation Foam Materials Preparation Modified with Lignin and Old Polyurethane

According to the ratio of phenolic resin,flame retardant agent,foaming agent,emulsifier,alkali lignin, lignin liquefaction of waste polyurethane, the waste polyurethane was prepared. The results show that:with the increase of curing agent, the shortening of curing time, the increase of apparent density, the enhancement of compressive strength, foam quality is better;adding flame retardant aluminum hypophosphite and diethyl aluminum hypophosphite can significantly improve the retardancy of phenolic resin;the effect are the best adding 5g aluminum phosphate and two ethyl aluminum hypophosphite. The light flame retardant insulation material has advantages of phenolic resin foam, improves the flame retardancy due to the addition of lignin, and using polyurethane as additive can greatly reduce the cost of production, protect environment, improve the utilization rate of resources.