GB2003864A - Esters useful in liquid crystals - Google Patents
Esters useful in liquid crystalsInfo
- Publication number
- GB2003864A GB2003864A GB7833580A GB7833580A GB2003864A GB 2003864 A GB2003864 A GB 2003864A GB 7833580 A GB7833580 A GB 7833580A GB 7833580 A GB7833580 A GB 7833580A GB 2003864 A GB2003864 A GB 2003864A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid crystals
- khz
- carbon atoms
- display
- group containing
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title abstract 2
- 150000002148 esters Chemical class 0.000 title 1
- 125000000217 alkyl group Chemical group 0.000 abstract 2
- 125000004432 carbon atom Chemical group C* 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- ZEYHEAKUIGZSGI-UHFFFAOYSA-N 4-methoxybenzoic acid Chemical compound COC1=CC=C(C(O)=O)C=C1 ZEYHEAKUIGZSGI-UHFFFAOYSA-N 0.000 abstract 1
- ZNPSUQQXTRRSBM-UHFFFAOYSA-N 4-n-Pentylphenol Chemical compound CCCCCC1=CC=C(O)C=C1 ZNPSUQQXTRRSBM-UHFFFAOYSA-N 0.000 abstract 1
- 239000004990 Smectic liquid crystal Substances 0.000 abstract 1
- 125000003545 alkoxy group Chemical group 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000000374 eutectic mixture Substances 0.000 abstract 1
- 230000005669 field effect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/363—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/58—Preparation of carboxylic acid halides
- C07C51/60—Preparation of carboxylic acid halides by conversion of carboxylic acids or their anhydrides or esters, lactones, salts into halides with the same carboxylic acid part
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Liquid Crystal Substances (AREA)
Abstract
Liquid crystals having at least one mesomorphic phase of the nematic type and, in some cases, a phase of the smectic type, correspond to the general formula: <IMAGE> in which R1 is an alkyl or alkoxy group containing 1 to 10 carbon atoms, R2 is an alkyl group containing 1 to 10 carbon atoms and X and Y form one of the following couples: (H, Br), H, CN), (Br, Cl), (CN, Cl), (Br, CN). A eutectic mixture of a selected three of the above compounds has a dielectric anisotropy DA which is +0.7 at 1 kHz, zero at 3.7 kHz and -1.1 at 1MHz. The DA of a mixture of a fourth or fifth of the above compounds with p-pentylphenol p-methoxy- benzoate (DA=+0.1) is negative and increasingly so with frequency. Application is to display by the dynamic diffusion of light or by memory-type field effect and to thermooptical display.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7725179A FR2400545A1 (en) | 1977-08-17 | 1977-08-17 | Liq. crystals of di:ester type - for use in electro=optical display panels |
| FR7802339A FR2415655A2 (en) | 1978-01-27 | 1978-01-27 | Liq. crystals of di:ester type - for use in electro=optical display panels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2003864A true GB2003864A (en) | 1979-03-21 |
| GB2003864B GB2003864B (en) | 1982-02-17 |
Family
ID=26220170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7833580A Expired GB2003864B (en) | 1977-08-17 | 1978-08-16 | Liquid crystals |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2836086A1 (en) |
| GB (1) | GB2003864B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5686018A (en) * | 1994-04-14 | 1997-11-11 | Chisso Corporation | Nematic liquid crystal composition |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4235736A (en) * | 1977-02-11 | 1980-11-25 | Thomson-Csf | Diphenylic esters exhibiting mesomorphic phases |
| FR2419966A1 (en) * | 1978-03-17 | 1979-10-12 | Thomson Csf | DIESTER TYPE LIQUID CRYSTAL WITH A SMECTIC PHASE, AT LOW DIELECTRIC ISOTROPY FREQUENCY, AND DISPLAY DEVICE USING THIS CRYSTAL |
| GB2046731B (en) | 1979-01-26 | 1983-04-20 | Suwa Seikosha Kk | (2'-cyano-4'-alkyl-)phenyl 3-chloro-4alkoxybenzoates theirpreparation and use in liquid crystal compositions |
| FR2461697A1 (en) * | 1979-07-20 | 1981-02-06 | Suwa Seikosha Kk | 2-CHLORO-4-ALCOHYLPHENYL 3-CYANO-4-ALCOXYBENZOATE AND USE THEREOF IN A LIQUID CRYSTAL COMPOSITION |
| US4290905A (en) * | 1979-12-26 | 1981-09-22 | Kabushiki Kaisha Suwa Seikosha | Ester compound |
| US4406814A (en) * | 1981-04-10 | 1983-09-27 | Eaton Corporation | Liquid crystalline materials and optical displays utilizing same |
-
1978
- 1978-08-16 GB GB7833580A patent/GB2003864B/en not_active Expired
- 1978-08-17 DE DE19782836086 patent/DE2836086A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5686018A (en) * | 1994-04-14 | 1997-11-11 | Chisso Corporation | Nematic liquid crystal composition |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2836086A1 (en) | 1979-03-01 |
| GB2003864B (en) | 1982-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |