Dichroic azo dyestuff and the polarizing film making from the same

Abstract

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:

Description

Claims

1. An azo dyestuff compound of the following formula (I), of which the free acid is represented by the following formula:

2. The azo dyestuff compound of claim 1, wherein said n is 1 or 2.

3. The azo dyestuff compound of claim 1, wherein R1 is —OH, and R3 is —NH2.

4. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (1) compound:

5. The azo dyestuff compound of claim 1, wherein the formula (I) compound is following formula (2) compound:

6. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (3) compound:

7. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (4) compound:

8. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (5) compound:

9. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (6) compound:

10. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (7) compound:

11. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (8) compound:

12. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (9) compound:

13. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (10) compound:

14. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (11) compound:

15. The azo dyestuff compound of claim 1, wherein the formula (I) compound is the following formula (12) compound:

16. A dye type polarizing film, said film is made from a polarizing film base material containing dichroic dyestuff, said dichroic dyestuff comprising the azo dyestuff compound of the following formula (I), of which the free acid is represented by the following formula:

17. The dye type polarizing film of claim 16, wherein said polarizing film base material is polyvinyl alcohol.

18. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (1):

19. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (2):

20. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (3):

21. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (4):

22. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (5):

23. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (6):

24. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (7):

25. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (8):

26. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (9):

27. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (10):

28. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (11):

29. The dye type polarizing film of claim 16, wherein said azo dyestuff compound of formula (I) is the azo dyestuff compound of the following formula (12):