液晶与显示, 2009, 24 (3): 345, 网络出版: 2010-01-22  

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
作者单位
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
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。
Abstract
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 results 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.

张建立, 尚洪勇, 梁晓, 刘鑫勤. TFT-LCD中聚酰亚胺取向剂用关键中间体4-BDAF的制备[J]. 液晶与显示, 2009, 24(3): 345. ZHANG Jian-li, SHANG Hong-yong, LIANG Xiao, LIU Xin-qin. Preparation of Key Intermediate 4-BDAF Used for PI Alignment Agent of TFT-LCD[J]. Chinese Journal of Liquid Crystals and Displays, 2009, 24(3): 345.

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