JPS564678A - Composition for liquid crystal color display element - Google Patents
Composition for liquid crystal color display elementInfo
- Publication number
- JPS564678A JPS564678A JP8011079A JP8011079A JPS564678A JP S564678 A JPS564678 A JP S564678A JP 8011079 A JP8011079 A JP 8011079A JP 8011079 A JP8011079 A JP 8011079A JP S564678 A JPS564678 A JP S564678A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- compd
- formula
- compsn
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
PURPOSE: To provide titled compsn. which is colored red by the application of electric voltage, consisting of a specified anthraquinone compd. and a nematic liquid crystal.
CONSTITUTION: 1.5-Diamino-4,8-dihydroxy-anthraquinonedisulfonic acid is reacted with a compd. of formula I [wherein R1 is 1W15C alkyl or a group of formula -R2- 0-R3 (wherein R2 is 1W3C straight or branched chain alkylene; R3 is 1W15C straight or branched chain alkyl] in the presence of boric acid and in sulfuric acid. The resulting product is reacted with a reducing agent to remove the sulfonic group. The amino group are replaced with hydroxyl group to obtain an anthraquinone compd. of formula II. 0.1W3% of the anthraquinone compd. is blended with a nematic liquid crystal to obtain the desired compsn. for liquid crustal color display element. The compsn. exhibits large contrast ratio by the application of voltage-no voltage, excels in durability, is stable, and does not lower the performance of a device even when the device is used for many hours.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8011079A JPS564678A (en) | 1979-06-27 | 1979-06-27 | Composition for liquid crystal color display element |
US06/128,713 US4304683A (en) | 1979-03-16 | 1980-03-10 | Composition for liquid crystal color display element |
GB8008600A GB2051113B (en) | 1979-03-16 | 1980-03-13 | Composition for liquid crystal colour display element |
CH203080A CH643289A5 (en) | 1979-03-16 | 1980-03-14 | MIXTURE FOR COLOR-DISPLAYING NEMATIC LIQUID CRYSTAL DISPLAY ELEMENTS. |
DE19803009940 DE3009940A1 (en) | 1979-03-16 | 1980-03-14 | COMPOSITION FOR A LIQUID CRYSTAL COLOR DISPLAY ELEMENT |
FR8005872A FR2451392B1 (en) | 1979-03-16 | 1980-03-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8011079A JPS564678A (en) | 1979-06-27 | 1979-06-27 | Composition for liquid crystal color display element |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS564678A true JPS564678A (en) | 1981-01-19 |
JPS623194B2 JPS623194B2 (en) | 1987-01-23 |
Family
ID=13709038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8011079A Granted JPS564678A (en) | 1979-03-16 | 1979-06-27 | Composition for liquid crystal color display element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS564678A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
-
1979
- 1979-06-27 JP JP8011079A patent/JPS564678A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
Also Published As
Publication number | Publication date |
---|---|
JPS623194B2 (en) | 1987-01-23 |
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