阻燃剂聚二甲基硅酸对苯二酯的合成及应用研究

Synthesis and Application of Flame Retardant Polydimethyl Silicon Acid Terephthalic Diester

摘要:

以二甲基二氯硅烷和对苯二酚为原料，合成聚合型有机硅阻燃剂聚二甲基硅酸对苯二酯。探讨了反应时间、反应温度对产率的影响，最佳工艺条件为：二甲基二氯硅烷和对苯二酚摩尔比为1:1，在40℃下，将二甲基二氯硅烷滴入到对苯二酚中，70℃反应7h，纯化处理，得到聚二甲基硅酸对苯二酯，产率为96.7%。通过FTIR、1H-NMR、TG-DTA、极限氧指数等技术表征产物的结构及性能。应用实验表明，该有机硅阻燃聚合物用于PBT、PP有较好的成炭阻燃效果，并与APP复配有很好的协同效应。

Abstract:

A kind of polymeric silicone flame retardant charring agent, polydimethyl silicon acid terephthalic diester was synthesized from dichlorodimethylsilane and hydroquinone. The effects of reaction time and reaction temperature on the yield were investigated. The optimum reaction conditions were: n(dichlorodimethylsilane):n(hydroquinone)=1:1, dropping dichlorodimethylsilane to hydroquinone at the temperature of 40℃, keeping the reaction at 70℃ for 7h. The target products would be received after purification, its yield was 96.7%. The structure and flame retardance of the product were characterized by means of FTIR、1H-NMR、TG-DTA and limiting oxygen index technique. The results showed that the product had a good charring flame retardant effect when applied to PBT or PP. And its complex formulation with APP had good synergistic effects.