Abstract: A flame retardant，pentaerythritol diphosphonate of melamine salt was synthesized，by using trisphosphoratethe，pentaerythritol and melamine as raw materials. The influence of reaction temperature，feed ratio of raw materials，reaction time and organic solvent on the flame retardant productivity was studied. The results showed that during the synthesis process of intermediate product，the recommended reaction condition was molar ratioe（phosphorous oxychloride）:（pentaerythritol）=（8～9）:1，reacting at 97℃ for 20h，and the highest productivity was 77.38%; during the synthesis process of flame retardant，the recommended reacting condition was molar ratio（intermediate product）：（melamine）=1:（2～3），reacting at 70℃ and under the condition of basicity for 10h，and the highest productivity was 86.3%. The final product was identified with IR，DSC and TG as pentaerythritol diphosphonate of melamine salt. The flame retardant trial showed that this salt had good flame retardant performance with PVA nonwoven fabric.

摘要： 以三氯氧磷、季戊四醇和三聚氰胺等为原料，合成了磷-氮类阻燃剂双氯螺磷三聚氰胺盐，探讨了反应温度、物料配比、时间和溶剂等对阻燃剂产率的影响。结果表明，中间体合成较优工艺为：三氯氧磷与季戊四醇的摩尔比为（8～9）∶1，在97 ℃下反应20 h，中间体最高产率为77.38%；阻燃剂合成较优工艺为：中间体与三聚氰胺的摩尔比为1∶（2～3），在70 ℃下及缚酸剂存在条件下反应10 h，阻燃剂最高产率为86.3%。通过红外光谱、DSC和TG测试，表明最终产物是双氯螺磷三聚氰胺盐。阻燃试验表明，合成的阻燃剂双氯螺磷三聚氰胺盐对PVA非织造布具有较好的阻燃配伍性能。