TFT-LCD中聚酰亚胺取向剂用关键中间体4-BDAF的制备  

Preparation of Key Intermediate 4-BDAF Used for PI Alignment Agent of TFT-LCD

作　　者：张建立[1,2] 尚洪勇[1,2] 梁晓[2] 刘鑫勤[1] 

机构地区：[1]石家庄永生华清液晶有限公司,河北石家庄050091 [2]清华大学化学系,北京100084

出　　处：《液晶与显示》2009年第3期345-349,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家“863”计划资助项目(No.2007AA02Z226)

摘　　要：4-BDAF是制备聚酰亚胺取向剂材料的关键中间体之一。自主设计了易于国产化的、全新的4-BDAF工艺合成路线。采用六氟丙酮、苯酚为起始原料,选择甲基磺酸为催化脱水剂,经过三步反应,通过优化原料配比、反应时间、反应温度等实验参数来选择最佳工艺条件。结果表明,在六氟丙酮、苯酚、催化剂的摩尔配比为1∶2∶2,反应温度控制在155℃,反应时间为11 h时的条件为最优工艺条件,4-BDAF的总收率达到57%。产品再经过精密提纯,在品质方面达到了国外公司产品的同等水平,价格具有明显优势,且易实现工业化量产。Polyimide （PI） was widely used as alignment agent of TET-LCD because of its excellent advantages, while 4-BDAF was a key intermediate of alignment layer used for PI preparation. A new synthesis method of 4-BDAF was studied and the reaction conditions were optimized in this research. The resuits showed that optimal reaction conditions were： the molar ratio of hexafluroacetone, phenol and catalyst was controlled to be 1：2：2; methanesulfonic acid was chosen as the catalytic dehydrant; the reaction temperature was 155 ℃ ; and the reaction time was 11 h, respectively. The yield of 4-BDAF was 57%. The quality of the purified products could be equal to that from companies overseas. However, the price was competitive. And the technology could be industrialized easily.

关 键 词：取向剂 聚酰亚胺 4-BDAF 原料配比 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业] TN141.9[电子电信—物理电子学]