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US4943386A
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Liquid crystalline compounds having substituents
Assignee: DIC Corp
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Filing: 1988-10-04
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Granted: 1990-07-24
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Expires: 2008-10-04
Abstract
Abstract A liquid crystalline compound represented by formula <IMAGE> (I) wherein R denotes an alkyl or alkoxy group having 1 to 20 carbon atoms, m and n are each 0 or 1, provided m and n are not 1 at the same time. <IMAGE> <IMAGE> X and Y each denote a hydrogen atom, a halogen atom or a nitro group, provided X and Y are not hydrogen atoms at the same time, and Q* denotes an optically active group having an asymmetric carbon atom and a linear or cyclic alkyl or alkenyl group which may be substituted by a halogen atom, or the like.
Inventors
- 👤 Sadao Takehara
- 👤 Toru Fujisawa
- 👤 Yoshi Arai
- 👤 Jitsuo Kurokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:25
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
88 words
A liquid crystalline compound of the formula ##STR80## wherein R denotes an alkyl or alkoxy group having 6 to 18 carbon atoms; m is 0 or 1; n is 2 when m is 0, or n is 1 when m is 1; and Q* denotes an optically active alkyl group having an asymmetric carbon atom selected from the group consisting of ##STR81## in which l is an integer of 1-3, R' denotes an alkyl group having 2 to 8 carbon atoms, and C* denotes an assymetrical carbon atom.
Claim 2
Dependent Claim
88 words
A liquid crystalline compound of the formula ##STR80## wherein R denotes an alkyl or alkoxy group having 6 to 18 carbon atoms; m is 0 or 1; n is 2 when m is 0, or n is 1 when m is 1; and Q* denotes an optically active alkyl group having an asymmetric carbon atom selected from the group consisting of ##STR81## in which l is an integer of 1-3, R' denotes an alkyl group having 2 to 8 carbon atoms, and C* denotes an assymetrical carbon atom.
Claim 3
Dependent Claim
22 words
The liquid crystalline compound of claim 1 wherein in the formula, R is an alkoxy group having 6 to 18 carbon atoms.
Claim 4
Dependent Claim
22 words
The liquid crystalline compound of claim 1 wherein in the formula, Q* is an optically active 2-methylbutyl, 3-methylpentyl, 1-methylpropyl or 1-methylheptyl group.
Claim 5
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of said formula as set forth in claim 1 and at least one other liquid crystalline compound.
Claim 6
Dependent Claim
13 words
The liquid crystalline composition of claim 4 having a chiral smectic C phase.
Claim 7
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of said formula as set forth in claim 2 and at least one other liquid crystalline compound.
Claim 8
Dependent Claim
13 words
The liquid crystalline composition of claim 6 having a chiral smectic C phase.
Claim 9
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of said formula as set forth in claim 3 and at least one other liquid crystalline compound.
Claim 10
Dependent Claim
13 words
The liquid crystalline composition of claim 8 having a chiral smectic C phase.
Claim 11
Dependent Claim
19 words
The liquid crystalline composition of claim 4 wherein said at least one other liquid crystalline compound comprises ((S)-2-methylbutyl p-decyloxycarbonylbenzylideneaminocinnamate.
Claim 12
Dependent Claim
21 words
A liquid crystalline composition comprising a mixture of at least two compounds of said formula as set forth in claim 1.
Claim 13
Dependent Claim
13 words
The liquid crystalline composition of claim 1 having a chiral smectic C phase.
Claim 14
Dependent Claim
29 words
The liquid crystalline composition of claim 12 wherein in at least one of the compounds of said formula, R is an alkoxy group having 6 to 18 carbon atoms.
Claim 15
Dependent Claim
29 words
The liquid crystalline composition of claim 12 wherein in at least one of the compounds of said formula, Q* is an optically active 2-methylbutyl, 3-methylpentyl, 1-methylpropyl or 1-methylheptyl group.
Claim 16
Dependent Claim
43 words
In a liquid crystal display cell having a thin film of a liquid crystalline composition sandwiched between two transparent electrodes, the improvement wherein the liquid crystalline composition comprises at least one liquid crystalline compound of said formula as set forth in claim 1.
Claim 17
Dependent Claim
15 words
The liquid crystalline compound of claim 1 wherein m is 0 and n is 2.
Claim 18
Dependent Claim
17 words
The liquid crystalline compound of claim 16 wherein R is an alkoxy group having 6-18 carbon atoms.
Claim 19
Dependent Claim
15 words
The liquid crystalline compound of claim 1 wherein m is 1 and n is 1.
Claim 20
Dependent Claim
17 words
The liquid crystalline compound of claim 18 wherein R is an alkoxy group having 6-18 carbon atoms.
References Cited (Backward Citations)
US31715A
Cited
US4216109A
Cited
USRE31715E
Cited
US4542230A
Cited
US4613209A
Cited
US4576732A
Cited
US4622165A
Cited
US4737313A
Cited
US4769176A
Cited
US4728458A
Cited
US4780242A
Cited
US4753752A
Cited
EP0256303A2
Cited
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