JPS55155082A - Liquid crystal color display composition - Google Patents
Liquid crystal color display compositionInfo
- Publication number
- JPS55155082A JPS55155082A JP6223379A JP6223379A JPS55155082A JP S55155082 A JPS55155082 A JP S55155082A JP 6223379 A JP6223379 A JP 6223379A JP 6223379 A JP6223379 A JP 6223379A JP S55155082 A JPS55155082 A JP S55155082A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- cyano
- dye
- alkyl
- anthraquinone
- 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.)
- Pending
Links
Abstract
PURPOSE: Titled composition suited for use in electronic calculator, comprising a nematic luquid crystal and a specific, anthraquinone type, dichromatic dye which has excellent durability and which, in a small amount, exhibits satisfactory coloring power.
CONSTITUTION: Titled composition is prepared by mixing (a) an anthraquinone type dichromatic dye such as a dye having formula III, expressed by structural formula II, (wherein R1 is a 1W3C alkyl or a group R2-O-R3; R2 is a 1W3C alkylene and R3 is a 1W3C alkyl), and prepared by reacting, in sulfuric acid and in the presence of boric acid, 1,5-diamino-4-8-dihydroxy-anthraquinone-disulfonic acid with a compound represented by formula I, (wherein R1 is the same as above), desulfonating the resulting compound and purifying the desulfonated product, with (b) a nematic liquid crystal such as one consisting mainly of 4-cyano-4'-n-pentylbiphenyl or 4-cyano-4'-n-propoxybiphenyl.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6223379A JPS55155082A (en) | 1979-05-22 | 1979-05-22 | Liquid crystal color display composition |
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 |
---|---|---|---|
JP6223379A JPS55155082A (en) | 1979-05-22 | 1979-05-22 | Liquid crystal color display composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55155082A true JPS55155082A (en) | 1980-12-03 |
Family
ID=13194229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6223379A Pending JPS55155082A (en) | 1979-03-16 | 1979-05-22 | Liquid crystal color display composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55155082A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
JPS58187454A (en) * | 1982-04-27 | 1983-11-01 | Nippon Kayaku Co Ltd | Anthraquinone compound |
-
1979
- 1979-05-22 JP JP6223379A patent/JPS55155082A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
JPS58187454A (en) * | 1982-04-27 | 1983-11-01 | Nippon Kayaku Co Ltd | Anthraquinone compound |
JPH026798B2 (en) * | 1982-04-27 | 1990-02-13 | Nippon Kayaku Kk |
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