JPS564678A - Composition for liquid crystal color display element - Google Patents

Composition for liquid crystal color display element

Info

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
Application number
JP8011079A
Other languages
Japanese (ja)
Other versions
JPS623194B2 (en
Inventor
Isao Nishizawa
Ryoichi Morinaka
Ryoichi Tsukahara
Tsuneo Hidaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP8011079A priority Critical patent/JPS564678A/en
Priority to US06/128,713 priority patent/US4304683A/en
Priority to GB8008600A priority patent/GB2051113B/en
Priority to CH203080A priority patent/CH643289A5/en
Priority to DE19803009940 priority patent/DE3009940A1/en
Priority to FR8005872A priority patent/FR2451392B1/fr
Publication of JPS564678A publication Critical patent/JPS564678A/en
Publication of JPS623194B2 publication Critical patent/JPS623194B2/ja
Granted legal-status Critical Current

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
JP8011079A 1979-03-16 1979-06-27 Composition for liquid crystal color display element Granted JPS564678A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56161488A (en) * 1980-04-18 1981-12-11 Bayer Ag Liquid crystal substance containing anthraquinone dye

Cited By (1)

* Cited by examiner, † Cited by third party
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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