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2,4-Difluorobenzene derivatives

Assignee: JNC Corp

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Filing: 1983-05-12

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Granted: 1985-10-22

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Expires: 2003-05-12

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Abstract

Abstract Novel compounds having a small dielectric anisotropy value (Δε), a low viscosity and a small γ value (ratio of saturation voltage to threshold voltage) indicating sharpness, and liquid crystal compositions containing the same are provided, which compounds are 2,4-difluorobenzene derivatives of trans-4-alkylcyclohexanes expressed by the general formula ##STR1## wherein n is 1 or 2, m is 0 or 1 and R represents an alkyl group of 1-10 carbon atoms.

Inventors

👤 Shigeru Sugimori
👤 Tetsuhiko Kojima

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-25 08:35

CPC Classifications

C; C07; C07C; C07C17/00; C07C17/35; C07C17/354; C07C25/00; C07C25/18; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C09K19/3066; C09K19/3068

Claims Analysis

Total Claims: 13

Claim 1

Independent Claim 50 words

2,4-Difluorobenzene derivatives of trans-4-alkylcyclohexanes expressed by the general formula ##STR5## wherein m represents 0 or 1; and further wherein if m represents 1, then n represents 1 or 2 and if m represents 0, then n represents 2 and R represents an alkyl group of 1 to 10 carbon atoms.

Claim 2

Dependent Claim 50 words

Claim 3

Dependent Claim 29 words

Compounds according to claim 1, expressed by the general formula ##STR6## wherein n represents 1 or 2 and R represents an alkyl group of 1 to 10 carbon atoms.

Claim 4

Dependent Claim 23 words

Compounds according to claim 1, expressed by the general formula ##STR7## wherein R represents an alkyl group of 1 to 10 carbon atoms.

Claim 5

Dependent Claim 20 words

A liquid crystal material comprising a mixture of compounds at least one of which is compound according to claim 1.

Claim 6

Dependent Claim 11 words

Compounds according to claim 1, expressed by the general formula ##STR8##

Claim 7

Dependent Claim 11 words

Compounds according to claim 1, expressed by the general formula ##STR9##

Claim 8

Dependent Claim 41 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; 15% by weight of trans-4-pentyl-(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-pentylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 9

Dependent Claim 41 words

Claim 10

Dependent Claim 42 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-hexylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 11

Dependent Claim 42 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-hexylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 12

Dependent Claim 52 words

A liquid crystal composition comprising 80% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl-(4"-cyanobiphenyl)cyclohexane; and 5% by weight of 2,4-difluoro-(trans-4-(trans-4-propylcyclohexyl)cyclohexyl)benzene; 10% by weight of 2,4-difluoro-(trans-4-(trans-4-butylcyclohexyl)cyclohexyl)benzene; and 5% by weight of 2,4-difluoro-(trans 4-(trans-4-heptylcyclohexyl)cyclohexyl)benzene.

Claim 13

Dependent Claim 52 words

References Cited (Backward Citations)

JPS5375181A Cited

US4302352A Cited

EP0019665A1 Cited

US4368135A Cited

GB2063250A Cited

GB2063287A Cited

US4340498A Cited

US4399298A Cited

JPS56149486A Cited

US4405488A Cited

US4400293A Cited

US4415470A Cited

JPS57154158A Cited

JPS57165326A Cited

JPS5813542A Cited

JPS5823634A Cited

EP0074608A2 Cited

US4490305A Cited

JPS58118543A Cited

EP0084194A1 Cited

JPS58126839A Cited

DE3209178A1 Cited

US4502974A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-10-21	1989-04-22	1989-10-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-10-21	1993-04-22	1993-10-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-10-21	1997-04-22	1997-10-22	$7700.00	Window Closed / Lapsed

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