保险粉法合成紫外线吸收剂UV-326  

Synthesis of Ultraviolet Absorbent UV-326 by Rongalite Method

作　　者：温辉梁[1] 周小英[2] 章金兵[2] 

机构地区：[1]南昌大学食品科学教育部重点实验室,江西南昌330047 [2]南昌大学化学系,江西南昌330047

出　　处：《塑料工业》2005年第6期13-15,共3页China Plastics Industry

摘　　要：以保险粉作还原剂,通过重氮化、偶合、还原反应合成了紫外线吸收剂UV326。研究了还原反应的投料比、温度以及氢氧化钠溶液浓度等因素对反应收率和产品质量的影响。结果表明较理想的反应条件是偶合物、保险粉与氢氧化钠的物质的量比为1∶3.5∶10.5,氢氧化钠溶液溶度为18%,在81℃下反应0.5h,总产率达86%以上,产品纯度为99.9%。以该工艺合成的紫外线吸收剂具有优良的紫外吸收能力,且在500nm可见光处的透光率为99.7%。Ultraviolet absorbent UV-326 was synthesized by means of diazotization,coupling and reduction, with rongalite as reduction agent.The effects of components molar ratio,temperature and the concentration of NaOH solution on the reaction yield and product quality were studied.The results showed the reasonable molar ratio for the coupling compound,rongalite and NaOH was 1∶3.5∶10.5,the concentration of NaOH solution was 18%,reacted at 81 ℃ for 0.5 h,in which the reaction yield was higher than 86%,with purity of 99.9%(by HPLC).The UV-Visible absorption capacity of this product was superior and had high transmittance at wavelengths of 440nm.

关 键 词：紫外线吸收剂 还原剂 保险粉 氢氧化钠 透光率 

分 类 号：TQ320.4[化学工程—合成树脂塑料工业]