申请人:Cheng Ming-Chin
公开号:US20070190269A1
公开(公告)日:2007-08-16
The present invention relates to a azo dyestuff compound of the following formula (I), of which the free acid is represented by the following formula:
wherein R
1
, R
2
, R
3
, R
4
, and n are defined as in the specification. The azo dyestuff compound of formula (I) of the present invention is used for preparing polarizing film. The present invention also relates to a polarizing film comprising the azo dyestuff compound of formula (I), which has excellent degree of polarization.
本发明涉及一种偶氮染料化合物,其化学式为(I),其自由酸的化学式表示为:其中,R1、R2、R3、R4和n如规范中所定义。本发明的化合物(I)偶氮染料用于制备偏光膜。本发明还涉及一种包含化合物(I)偶氮染料的偏光膜,具有优异的偏振度。