EP0152697A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heterocyclically substituted ethanes and their use in liquid crystal materials and devices
Assignee: UK Secretary of State for Defence
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Filing: 1984-12-31
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Granted: —
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Expires: 2004-12-31
Abstract
Abstract A heterocyclically substituted ethane having a formula: wherein A represents a heterocyclic ring selected from a trans 2,5 disubstituted 1,3 dioxan ring and a 2,5 disubstituted 1,3-pyrimidine ring; R, represents an alkyl group having from 1 to 15 carbon atoms and R 2 represents a group selected from hydrogen, alkyl having from 1 to 15 carbon atoms and alkoxy having from 1 to 15 carbon atoms provided that where A is a trans 2,5 disubstituted 1,3 dioxan ring R 2 is alkyl; and Cy represents a trans-1,4 disubstituted cyclohexane ring.
Inventors
- 👤 George William Gray
- 👤 Nicholas, (Nee Andrews) B. M.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:03
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C309/00; C07C31/00; C07C31/13; C07C31/133; C07C31/135; C07C31/1355; C07C47/00; C07C47/02; C07C47/105; C07C47/11; C07C53/00; C07C53/132; C07C53/134; C07D239/28; C07D239/32; C07D239/34; C07D319/00; C07D319/04; C07D319/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K19/3441; C09K19/345; C09K19/3458; C09K2019/3422
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A heterocyclically substituted ethane having a formula: wherein A represents a heterocyclic ring selected from a trans 2,5 disubstituted 1,3 dioxan ring and a 2,5 disubstituted 1,3- pyrimidine ring; R 1 represents an alkyl group having from 1 to 15 carbon atoms and R 2 represents a group selected from hydrogen, alkyl having from 1 to 15 carbon atoms and alkoxy having from 1 to 15 carbon atoms provided that where A is a trans 2,5 disubstituted 1,3 dioxan ring R 2 is alkyl; and Cy represents a trans-1,4 disubstituted cyclohexane ring.
Claim 2
Dependent Claim
92 words
A heterocyclically substituted ethane having a formula: wherein A represents a heterocyclic ring selected from a trans 2,5 disubstituted 1,3 dioxan ring and a 2,5 disubstituted 1,3- pyrimidine ring; R 1 represents an alkyl group having from 1 to 15 carbon atoms and R 2 represents a group selected from hydrogen, alkyl having from 1 to 15 carbon atoms and alkoxy having from 1 to 15 carbon atoms provided that where A is a trans 2,5 disubstituted 1,3 dioxan ring R 2 is alkyl; and Cy represents a trans-1,4 disubstituted cyclohexane ring.
Claim 3
Dependent Claim
36 words
An ethane as claimed in claim 1 and wherein R 1 and R 2 each independently represents n-alkyl and has from 1 to 10 carbon atoms and A is a trans 2,5 disubstituted 1,3 dioxan ring.
Claim 4
Dependent Claim
41 words
An ethane as claimed in claim 1 and wherein R 1 represents n-alkyl having from 1 to 10 carbon atoms, A represents 2,5- disubstituted 1,3 pyrimidine ring and R 2 represents n-alkoxy or n-alkyl having from 1 to 10 carbon atoms.
Claim 5
Dependent Claim
26 words
A liquid crystal material which is a composition comprising a mixture of compounds at least one of which is an ethane as claimed in claim 1.
Claim 6
Dependent Claim
73 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 includes at least one ethane as claimed in claim 1.
References Cited (Backward Citations)
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