US4551264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhalogenoaromatic compounds for liquid crystal compositions
Assignee: Merck Patent GmbH
•
Filing: 1983-03-14
•
Granted: 1985-11-05
•
Expires: 2003-03-14
Abstract
Abstract New polyhalogenoaromatic compounds of Formula I ##STR1## wherein Y and Z are each independently alkyl, alkoxy or alkanoyl each of 1 to 12 C atoms, --COOR 1 , --O--CO--R 1 , CN, NO 2 , NH 2 or OH; Q is one or two identical or different radicals selected from Ph, Cy, 1,4-bicyclo[2,2,2]octylene or 1,3-dioxane-2,5-diyl; X 1 to X 4 are each independently H, F, Cl or Br; R 1 is alkyl of 1 to 4 C atoms, Ph--R 2 or Cy--R 2 ; R 2 is alkyl or alkoxy each of 1-12 C atoms or CN; Ph is 1,4-phenylene; and Cy is 1,4-cyclohexylene, can be used as components of liquid-crystal dielectrics.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Michael Romer
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/07; C07C205/11; C07C205/12; C07C17/00; C07C17/35; C07C25/00; C07C25/18; C07C255/00; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07C45/00; C07C45/004; C07D; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/30; C09K19/3001; C09K19/3003; C09K19/32; C09K19/321; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
147 words
A liquid-crystal dielectric useful in electrooptical display elements comprising at least two liquid-crystalline components, wherein at least one component is a polyhalogenoaromatic compound of the formula ##STR4## wherein Y and Z are each independently alkyl, alkoxy or alkanoyl each of 1 to 12 C atoms, --COOR 1 , --O--CO--R 1 , CN, or NO 2 ; Q is one or two identical or different groups selected from Ph, Cy, or 1,4-bicyclo-[2,2,2]octylene; X 1 to X 4 are each independently H, F, Cl or Br; R 1 is alkyl of 1 to 4 C atoms, Ph--R 2 or Cy--R 2 ; R 2 is alkyl or alkoxy each of 1-12 C atoms, or CN; Ph is 1,4-phenylene; and Cy is 1,4-cyclohexylene; with the proviso that not more than one of X 1 and X 2 and not more than one of X 3 and X 4 is hydrogen.
Claim 2
Dependent Claim
147 words
A liquid-crystal dielectric useful in electrooptical display elements comprising at least two liquid-crystalline components, wherein at least one component is a polyhalogenoaromatic compound of the formula ##STR4## wherein Y and Z are each independently alkyl, alkoxy or alkanoyl each of 1 to 12 C atoms, --COOR 1 , --O--CO--R 1 , CN, or NO 2 ; Q is one or two identical or different groups selected from Ph, Cy, or 1,4-bicyclo-[2,2,2]octylene; X 1 to X 4 are each independently H, F, Cl or Br; R 1 is alkyl of 1 to 4 C atoms, Ph--R 2 or Cy--R 2 ; R 2 is alkyl or alkoxy each of 1-12 C atoms, or CN; Ph is 1,4-phenylene; and Cy is 1,4-cyclohexylene; with the proviso that not more than one of X 1 and X 2 and not more than one of X 3 and X 4 is hydrogen.
Claim 3
Dependent Claim
30 words
A liquid crystal dielectric of claim 1, wherein said at least one component is of the formula Y--Cy--W--Z wherein W is 2-X 2 -3-X 1 -5-X 4 -6-X 3 -1,4-phenylene.
Claim 4
Dependent Claim
38 words
A liquid crystal dielectric of claim 1, wherein said at least one component is of the formula Y--Ph--W--Z Y--Bi--W--Z Y--Ph--Ph--W--Z Y--Ph--Cy--W--Z Y--Cy--Ph--W--Z Y--Cy--Cy--W--Z wherein W is 2-X 2 -3-X 1 -5-X 4 -6-X 3 -1,4-phenylene, Bi is 1,4-bicyclo[2,2,2]octylene.
Claim 5
Dependent Claim
39 words
A liquid crystal dielectric of claim 1, wherein said at least one component is of the formula Y--Cy--W--Z Y--Ph--Bi--W--Z Y--Cy--Bi--W--Z Y--Bi--Ph--W--Z Y--Bi--Cy--W--Z Y--Bi--Bi--W--Z wherein W is 2-X 2 -3-X 1 -5-X 4 -6-X 3 -1,4-phenylene, and Bi is 1,4-bicyclo[2,2,2]octylene.
Claim 6
Dependent Claim
23 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, the alkyl portion of all groups is straight chained.
Claim 7
Dependent Claim
26 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, the substituents on all cyclohexylene groups are trans relative to each other.
Claim 8
Dependent Claim
25 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, the alkyl portion of all groups is of 1-6 C atoms.
Claim 9
Dependent Claim
25 words
A liquid crystalline dielectric of claim 1, wherein said at least one component contains only one branched alkyl portion which contains only one chain branching.
Claim 10
Dependent Claim
17 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, Y is alkyl.
Claim 11
Dependent Claim
21 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, Z is CN or NO 2 .
Claim 12
Dependent Claim
24 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, the X 1 -X 4 -substituted benzene ring is 2,6-dihalogeno-1,4-phenylene.
Claim 13
Dependent Claim
24 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, at least one of X 1 -X 4 is F.
Claim 14
Dependent Claim
27 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component the X 1 -X 4 -substituted benzene ring is 2,6-difluoro-1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene or 2,6-chloro-1,4-phenylene.
Claim 15
Dependent Claim
28 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, R 1 is linear alkyl of 1-4 C-atoms, Ph--R 2 or Cy--R 2 .
Claim 16
Dependent Claim
18 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, R 2 is alkyl.
Claim 17
Dependent Claim
10 words
A dielectric of claim 1 comprising 2-15 liquid crystalline components.
Claim 18
Dependent Claim
16 words
A dielectric of claim 1 wherein the amount of said polyhalogenoaromatic compound is 0.1-30 wt. %.
Claim 19
Dependent Claim
23 words
In an electrooptical display element comprising a liquid-crystal cell having a liquid-crystal dielectric, the improvement wherein the dielectric is that of claim 1.
Claim 20
Dependent Claim
24 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, at least one of X 1 -X 4 is Cl.
Claim 21
Dependent Claim
24 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, at least one of X 1 -X 4 is Br.
Claim 22
Dependent Claim
24 words
A liquid crystalline dielectric of claim 1, wherein in said at least one component, at least one of X 1 -X 4 is H.
References Cited (Backward Citations)
DE2356085A1
Cited
US3974087A
Cited
US4151302A
Cited
US4216109A
Cited
US4256656A
Cited
GB2039937A
Cited
EP0019665A1
Cited
US4368135A
Cited
DE2933563A1
Cited
DE2939782A1
Cited
GB2063287A
Cited
GB2063250A
Cited
US4400061A
Cited
US4405488A
Cited
US4400293A
Cited
US4415470A
Cited
JPS57179134A
Cited
US4419264A
Cited
JPS5813542A
Cited
JPS5818326A
Cited
JPS5823634A
Cited
US4490305A
Cited
EP0084194A1
Cited
US4478740A
Cited
US4479885A
Cited
JPS58148839A
Cited
JPS58150542A
Cited
DE3208089A1
Cited
US4505838A
Cited
JPS58188840A
Cited
JPS58188839A
Cited
DE3317921A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |