阻燃剂硼酸锌的合成

Synthesis of Flame Retardant Zing Borate

硼酸锌是一种性能优良的无机添加型阻燃剂。组成为 2ZnO·3B2 O3·3.5H2 O的低水合硼酸锌应用得最为广泛。采用硼砂法合成了低水合硼酸锌 ,用正交法确定的最佳工艺条件是 :反应温度为 338K ,硫酸锌和硼砂的配料比为 1 .0 5∶1 ,液固比为 3.5∶1 ,反应时间为6h .

Zinc botate is a kind of inorganic retardant with superior property. Especially Zinc Borate with composition of 2ZnO·3B 2O 3·3.5H 2O is widely used. The paper studied and obtained the technical conditions of preparation by orthogonal experimental design. The technical conditions were: temperature of 338 K, mixture mole ratio of ZnSO 4·7H 2O to Na 2B 4O 7·10H 2O of 1.05∶1, liquid solid ratio at 3.5∶1, reaction time of 6 hours. Zinc botate synthesized under this condition is finer and more evenly distributed than other conditions.