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EP0097033A2
Expired / Lapsed
EP
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Liquid crystal compounds
Assignee: UK Secretary of State for Defence
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Filing: 1983-06-09
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Granted: —
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Expires: 2003-06-09
Abstract
Abstract A novel liquid crystal compound has a formula: where: is a trans-2,5-disubstituted-1,3-dioxan ring or a 2,5- disubstituted-1,3-pyrimidine ring is a 1,4-disubstituted benzene ring optionally containing one or more F, Cl or CH 3 groups as lateral substituents; R 1 is an alkyl group; and X is a terminal group selected from H, CN, Cl, F and R 2 where R 2 is selected from alkyl R 3 , alkoxy OR 3 , alkylcarbonyloxy OCOR 3 and alkoxycarbonyloxy OCOOR 3 .
Inventors
- 👤 Beatrice Mary Andrews
- 👤 Neil Carr
- 👤 George William Gray
- 👤 Christine Hogg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 08:14
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D313/00; C07D313/02; C07D313/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3469; C09K2019/3422
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
A liquid crystal compound having a formula: where: is a heterocyclic ring selected from a trans-2,5- disubstituted-1,3-dioxan ring and a 2,5-disubstituted-1,3--pyrimidine ring; is a 1,4-disubstituted benzene ring optionally containing one or more F, Cl or CH 3 groups as lateral substituents; R 1 is an alkyl group; and X is a terminal group selected from H, CN, F and R 2 where R 2 is selected from alkyl, alkoxy, alkylcarbonyloxy and alkoxycarbonyloxy.
Claim 2
Dependent Claim
72 words
A liquid crystal compound having a formula: where: is a heterocyclic ring selected from a trans-2,5- disubstituted-1,3-dioxan ring and a 2,5-disubstituted-1,3--pyrimidine ring; is a 1,4-disubstituted benzene ring optionally containing one or more F, Cl or CH 3 groups as lateral substituents; R 1 is an alkyl group; and X is a terminal group selected from H, CN, F and R 2 where R 2 is selected from alkyl, alkoxy, alkylcarbonyloxy and alkoxycarbonyloxy.
Claim 3
Dependent Claim
9 words
A compound as claimed in claim 1 and wherein
Claim 4
Dependent Claim
22 words
A compound as claimed in claim 2 and wherein R 1 is an n-alkyl group containing from 1 to 9 carbon atoms.
Claim 5
Dependent Claim
32 words
A compound as claimed in claim 3 and wherein X is selected from H, CN n-alkyl containing from 1 to 5 carbon atoms and n-alkoxy containing from 1 to 9 carbon atoms.
Claim 6
Dependent Claim
9 words
A compound as claimed in claim 1 and wherein
Claim 7
Dependent Claim
22 words
A compound as claimed in claim 5 and wherein R 1 is an n-alkyl group containing from 1 to 9 carbon atoms.
Claim 8
Dependent Claim
32 words
A compound as claimed in claim 5 and wherein X is selected from H, CN n-alkyl containing from 1 to 9 carbon atoms and n-alkoxy containing from 1 to 9 carbon atoms.
Claim 9
Dependent Claim
80 words
A liquid crystal device including two dielectric substrates at least one of which is optically transparent, a layer of liquid crystal material sandwiched between the substrates and electrodes on the inner surfaces of the substrates to enable an electric field to be applied across the layer of liquid crystal material to provide an electro-optic effect therein, characterised in that the liquid crystal material is a material which includes at least one compound of Formula I as specified in claim 1.
References Cited (Backward Citations)
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