IL41423A - Modified nematic phases - Google Patents
Modified nematic phasesInfo
- Publication number
- IL41423A IL41423A IL41423A IL4142373A IL41423A IL 41423 A IL41423 A IL 41423A IL 41423 A IL41423 A IL 41423A IL 4142373 A IL4142373 A IL 4142373A IL 41423 A IL41423 A IL 41423A
- Authority
- IL
- Israel
- Prior art keywords
- modified
- phase
- nematic
- azoxybenzene
- methoxy
- Prior art date
Links
- 238000000034 method Methods 0.000 claims 10
- 150000001735 carboxylic acids Chemical class 0.000 claims 7
- 239000000374 eutectic mixture Substances 0.000 claims 6
- 150000003839 salts Chemical class 0.000 claims 6
- 125000004432 carbon atom Chemical group C* 0.000 claims 5
- 239000005711 Benzoic acid Substances 0.000 claims 3
- 125000000217 alkyl group Chemical group 0.000 claims 3
- 239000002253 acid Substances 0.000 claims 2
- 125000003545 alkoxy group Chemical group 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 125000005843 halogen group Chemical group 0.000 claims 2
- 230000004048 modification Effects 0.000 claims 2
- 238000012986 modification Methods 0.000 claims 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims 2
- 150000004714 phosphonium salts Chemical class 0.000 claims 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims 2
- 241000283986 Lepus Species 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 125000001309 chloro group Chemical group Cl* 0.000 claims 1
- 125000001424 substituent group Chemical group 0.000 claims 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
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/56—Aligning agents
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal Substances (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Claims (22)
1. A What we claim is : -1. A modified nematic phase comprising a known nematic phase containing 0.001 to 2% by weight of at least one carboxylic acid of the general formula:- H00C-(HC=CH) and/or at least one salt thereof, in which Y is -R^ or -A-^^-R2, A is -CH = CH-, -XC = CH-.,. -HC = CX-, -C Ξ C-, -N = N-, -N = N-, -N = N-, -0 - CO-, -CO - 0-, -CH = N-, o o -N an alkyl or alkoxy radical containing 6 to 8 carbon atoms or an acyloxy radical containing 4 to 18 carbon atoms, Rg is an alkyl, alkoxy or acyloxy radical containing up to 18 carbon atoms, X is a halogen atom and n is 0 or , with the proviso that ^ = g when n is 1.
2. A modified phase according to claim 1, wherein the 1 acid and/or salt is present in an amount of 0.01 to 0.25% by weight. \
3. A modified phase according to claim 1 or 2, wherein the halogen atom X is a chlorine atom.
4. » A modified phase according to any of the preceding claims, wherein the radical A of the carboxylic acid is . also present in at least one of the molecules forming the nematic phase.
5. A modif ed phase according to any of the preceding claims, wherein the salt used is a quaternary ammonium-and/or phosphonium salt.
6. A modified phase according to any of the preceding A claims, wherein the' hematic phase comprises at least one isomeric pair and/or at least one eutectic mixture of compounds of,' the; general formula :- in which A has the same meaning as in claim 1 and and 'Rg, which may he the same or different, are alkyl, alkoxy or acyloxy radicals containing up to 18 carbon atoms.
7. A modified phase according to claim 6, wherein the substituents and Rg contain up to 8 carbon atoms.
8. ; A modified phase according to any of the preceding,;, claims, wherein the nematic phase comprises a eutectic mixture of -(n-butyl)- ' -methoxy-azoxybenzene and -et-hyl- -methoxy-azoxybenzene.
9. A modified phase according to any of the preceding claims, wherein the nematic phase comprises a eutectic mixture of j2, -di~(n-butyl)-p_'-azoxybenzene and the isomer pair _-(n-butyl)- ' -methoxy-azoxybenzene .
10. A modified phase according to any of the preceding claims, wherein the carboxylic acid is ,-(£-methoxy-phenylazoxy)-benzoic acid and/or _-(_-ethoxy-phenylazoxy)-benzoic acid.
11. Modified nematic phases according to claim 1 , substantially as hereinbefore described and exemplified.
12... A process for the modification of a nematic phase,, wherein a known nematic phase is mixed with 0.001 to 2% by weight of at least one carboxylic acid of the general formula given in claim 1 and/or with at least one salt thereof.
13. A process according to claim 12, wherein there is used 0.01 to 0.25% by weight of at least one ' carboxylic acid of the general formula given in claim 1 and/or at least one salt thereof.
14. 12+. A process according to claim 12 or 13,. wherein the radical A of the carboxylic acid is also present in at least one of the molecules forming the nematic phase.
15. process according to any of claims 12 to 1 , wherein the salt used is a quaternary ammonium and/or phosphonium salt.
16. A process.t.aceording .to any of claims 12 to 15, wherein the nematic- hase to be modified comprises at least one isomeric 'pair and/or at least one eutectic mixture of compounds of the general formula given in claim 6.
17. A process according to any of claims 12 to 16, wherein the nematic phase to be modified comprises a eutectic mixture . of - (n-butyl)-i|.' -methoxy-azoxybenzene and i^-ethyl-V -methoxy-azoxybenzene .
18. A process according to any of claims 12 to 17, wherein the; nematic phase comprises a eutectic mixture . of £,p_' -di-(n-butyl)-£T-azoxybenzene and the isomer pair £- (n-butyl)-£' -methoxy-azoxybenzene .
19.- A process according to any of claims 12 to. 18, wherein the carboxylic acid used is p_-(_-methoxy-phenylazoxy) -benzo c · acid · and/o £- (_-etho.xy-phenylazox )-benzoic acid.
20. A process according to claim 2 for the modification of nematic phases , substantially as hereinbefore described and exemplified.
21. Modified nematic phases, whenever prepared by the process according to any of claims 12 to 20.
22. Indicator devices, whenever comprising a modified nematic phase according to any of claims 1 to 11 and 21. P. O. Box 33116 , Tel-Avi Attorneys for Applicant
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2209127A DE2209127A1 (en) | 1972-02-26 | 1972-02-26 | MODIFIED NEMATIC PHASES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL41423A0 IL41423A0 (en) | 1973-03-30 |
| IL41423A true IL41423A (en) | 1976-01-30 |
Family
ID=5837180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL41423A IL41423A (en) | 1972-02-26 | 1973-01-30 | Modified nematic phases |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS4899085A (en) |
| AT (1) | AT326191B (en) |
| BE (1) | BE795849A (en) |
| CH (1) | CH585256A5 (en) |
| DD (1) | DD106762A5 (en) |
| DE (1) | DE2209127A1 (en) |
| FR (1) | FR2173301B1 (en) |
| GB (1) | GB1376115A (en) |
| IL (1) | IL41423A (en) |
| IT (1) | IT979477B (en) |
| NL (1) | NL7301300A (en) |
| SU (1) | SU469264A3 (en) |
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| EP4574923A1 (en) | 2023-12-19 | 2025-06-25 | Merck Patent GmbH | Liquid-crystalline medium |
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| EP4582510A1 (en) | 2024-01-05 | 2025-07-09 | Merck Patent GmbH | Liquid-crystal medium |
| US20250277152A1 (en) | 2024-02-29 | 2025-09-04 | Merck Patent Gmbh | Liquid-crystal medium |
| WO2025190996A1 (en) | 2024-03-15 | 2025-09-18 | Merck Patent Gmbh | Liquid-crystalline medium |
| WO2025219502A1 (en) | 2024-04-19 | 2025-10-23 | Merck Patent Gmbh | Liquid-crystalline medium |
| EP4656703A1 (en) | 2024-05-28 | 2025-12-03 | Merck Patent GmbH | Liquid-crystal medium comprising polymerizable compounds |
-
0
- BE BE795849D patent/BE795849A/en unknown
-
1972
- 1972-02-26 DE DE2209127A patent/DE2209127A1/en active Pending
-
1973
- 1973-01-26 GB GB399573A patent/GB1376115A/en not_active Expired
- 1973-01-30 IL IL41423A patent/IL41423A/en unknown
- 1973-01-30 NL NL7301300A patent/NL7301300A/xx unknown
- 1973-02-21 CH CH245573A patent/CH585256A5/xx not_active IP Right Cessation
- 1973-02-23 AT AT164173A patent/AT326191B/en not_active IP Right Cessation
- 1973-02-23 SU SU1888507A patent/SU469264A3/en active
- 1973-02-26 DD DD169051A patent/DD106762A5/xx unknown
- 1973-02-26 IT IT20854/73A patent/IT979477B/en active
- 1973-02-26 FR FR7306674A patent/FR2173301B1/fr not_active Expired
- 1973-02-26 JP JP48022292A patent/JPS4899085A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SU469264A3 (en) | 1975-04-30 |
| CH585256A5 (en) | 1977-02-28 |
| GB1376115A (en) | 1974-12-04 |
| IT979477B (en) | 1974-09-30 |
| FR2173301A1 (en) | 1973-10-05 |
| FR2173301B1 (en) | 1976-06-11 |
| AT326191B (en) | 1975-11-25 |
| BE795849A (en) | 1973-08-23 |
| DE2209127A1 (en) | 1973-09-06 |
| NL7301300A (en) | 1973-08-28 |
| ATA164173A (en) | 1975-02-15 |
| IL41423A0 (en) | 1973-03-30 |
| DD106762A5 (en) | 1974-06-20 |
| JPS4899085A (en) | 1973-12-15 |
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