EP0117631A1
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EP
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Disubstituted ethanes and their use in liquid crystal materials and devices
Assignee: Merck Patent GmbH
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Filing: 1984-01-26
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Granted: —
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Expires: 2004-01-26
Abstract
Abstract A fluorinated compound having a formula: wherein: R, is hydrogen or alkyl having up to 12 carbon atoms; R 2 is selected from hydrogen, alkyl having up to 12 carbon atoms, alkoxy having up to 12 carbon atoms, wherein R 3 is hydrogen or alkyl having up to 12 carbon atoms, and wherein R 4 is hydrogen, alkyl having up to 12 carbon atoms or alkoxy having up to 12 carbon atoms; represents a cyclohexane ring which is in the trans configuration if 1,4-disubstituted; represents a benzene ring; each of X, Y and Zindependently represents hydrogen or fluorine in one or more of the lateral benzene ring positions, provided that at least one of X, Y and Z is present representing fluorine; n = 0 or 1 provided that when is and R, is alkyl; with the proviso that in Formula l when n is 1 and where R is n-alkyl and R 2 is n-alkyl or n-alkoxy the total number of carbon number of carbon plus oxygen atoms in the two groups R 1 and R 2 is less than 10.
Inventors
- 👤 Peter Hugh Balkwill
- 👤 David Ian Bishop
- 👤 Andrew David Pearson
- 👤 Ian Charles Sage
- 👤 George William Gray
- 👤 David Lacey
- 👤 Kenneth Johnson Toyne
- 👤 Damien Gerard Mcdonnell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 00:46
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C07; C07C; C07C17/00; C07C17/35; C07C17/26; C07C17/263; C07C17/2632; C07C17/354; C07C25/00; C07C25/18; C07C35/00; C07C35/48; C07C35/50; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/80; C07C49/813; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C09K19/3028; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
188 words
A fluorinated compound having a formula: wherein: is either R 1 is hydrogen or alkyl having up to 12 carbon atoms; R 2 is selected from hydrogen, alkyl having up to 12 carbon atoms, alkoxy having up to 12 carbon atoms, wherein R 3 is hydrogen or alkyl having up to 12 carbon atoms, and wherein R 4 is hydrogen, alkyl having up to 12 carbon atoms or alkoxy having up to 12 carbon atoms; represents a cyclohexane ring which is in the trans configuration if 1, 4-disubstituted; represents a benzene ring; each of X, Y and Z.independently represents hydrogen or fluorine in one or more of the lateral benzene ring positions, provided that at least one of X, Y and Z is present representing fluorine; n = 0 or 1 provided that when n = 0 and R 1 is alkyl; with the proviso that in Formula I when n is 1 and is where R 1 is n-alkyl and R 2 is n-alkyl or n-alkoxy the total number of carbon plus oxygen atoms in the two groups R 1 and R 2 is less than 10.
Claim 2
Dependent Claim
188 words
A fluorinated compound having a formula: wherein: is either R 1 is hydrogen or alkyl having up to 12 carbon atoms; R 2 is selected from hydrogen, alkyl having up to 12 carbon atoms, alkoxy having up to 12 carbon atoms, wherein R 3 is hydrogen or alkyl having up to 12 carbon atoms, and wherein R 4 is hydrogen, alkyl having up to 12 carbon atoms or alkoxy having up to 12 carbon atoms; represents a cyclohexane ring which is in the trans configuration if 1, 4-disubstituted; represents a benzene ring; each of X, Y and Z.independently represents hydrogen or fluorine in one or more of the lateral benzene ring positions, provided that at least one of X, Y and Z is present representing fluorine; n = 0 or 1 provided that when n = 0 and R 1 is alkyl; with the proviso that in Formula I when n is 1 and is where R 1 is n-alkyl and R 2 is n-alkyl or n-alkoxy the total number of carbon plus oxygen atoms in the two groups R 1 and R 2 is less than 10.
Claim 3
Dependent Claim
60 words
A fluorinated compound as claimed in claim 1 and wherein the compound is a biphenyl of formula: wherein R A is n-alkyl, R is n-alkyl or n-alkoxy and the total number of carbon plus oxygen atoms in R A and R B is less than 10, X and Y being selected from H and F at least one being F.
Claim 4
Dependent Claim
30 words
A fluorinated compound as claimed in claim 2 and wherein the total number of carbon plus oxygen atoms in R 1 and R 2 is between 4 and 8 inclusive.
Claim 5
Dependent Claim
43 words
A fluorinated compound as claimed in claim 1 and wherein the compound is a chiral biphenyl of formula: wherein R A is n-alkyl, R B is chiral alkyl and X and Y are selected from H and F at least one being F.
Claim 6
Dependent Claim
40 words
A fluorinated compound as claimed in claim 1 and wherein the compound has a formula: wherein R 2 is alkyl and each of X, Y and Z is each independently selected from H and F, at least one being F.
Claim 7
Dependent Claim
48 words
A fluorinated compound as claimed in claim 1 and wherein the compound is a terphenyl of formula: wherein R 1 is n-alkyl, R 2 is n-alkyl or n-alkoxy and each of X, Y, Z and W is independently selected from F and H, at least one being F.
Claim 8
Dependent Claim
64 words
A fluorinated compound as claimed in claim 1 and wherein the compund is a biphenyl derivative having a formula: wherein: R l represents an alkyl group; represents a trans 1,4-disubstituted cyclohexane ring; represents biphenyl carrying at least one fluorine substituent in a position lateral of the biphenyl axis; Q represents or hydrogen or wherein R 2 is alkyl; and n is 0 or 1.
Claim 9
Dependent Claim
15 words
A biphenyl derivative as claimed in claim 7 and wherein the group is selected from
Claim 10
Dependent Claim
20 words
A biphenyl derivative as claimed in claim 7 and wherein R 1 and R 2 both independently represent n-alkyl groups.
Claim 11
Dependent Claim
18 words
A liquid crystal composition comprising a mixture of different compounds of Formula I as claimed in claim 1.
Claim 12
Dependent Claim
15 words
A liquid crystal composition comprising a mixture of different compounds as claimed in claim 3.
Claim 13
Dependent Claim
39 words
A composition as claimed in claim 11 and wherein the different compounds in the compositon each have R 2 = n-alkyl and have different total numbers of carbon atoms in the two groups R 1 and R 2 .
Claim 14
Dependent Claim
74 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 compound as claimed in claim 1. -
References Cited (Backward Citations)
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