US4622165A
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Liquid crystal mixture of a liquid crystal compound having a smectic C phase and an optically active compound
Assignee: Alps Alpine Co Ltd
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Filing: 1984-07-27
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Granted: 1986-11-11
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Expires: 2004-07-27
Abstract
Abstract A liquid crystal composition which comprises a liquid crystal compound having a smectic C phase and an optically active substance, both of said liquid crystal compound and optically active substance being compounds having an ester type bond in the molecular structure, and which has a lowered transition temperature region for the smectic C phase, is chemically stable and stable for use in field effect type liquid crystal display elements etc.
Inventors
- 👤 Mitsuru Kano
- 👤 Yoshinori Kato
- 👤 Yoshimi Kamijo
- 👤 Masahiro Hatano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/58; C09K19/586; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A liquid crystal composition exhibiting a chiral smectic C phase which comprises a mixture of a liquid crystal compound having a non-chiral smectic C phase and an optically active compound, both of said liquid crystal compound and optically active compound having an ester linkage in the central core of its molecular structure.
Claim 2
Dependent Claim
52 words
A liquid crystal composition exhibiting a chiral smectic C phase which comprises a mixture of a liquid crystal compound having a non-chiral smectic C phase and an optically active compound, both of said liquid crystal compound and optically active compound having an ester linkage in the central core of its molecular structure.
Claim 3
Dependent Claim
72 words
The liquid crystal composition according to claim 1 wherein said liquid crystal compound is a compound of the following general structural formula: ##STR23## wherein R 1 and R 2 each represent --C x H 2x+1 or --OC x H 2x+1 wherein x is an integer of 4-15, z and m are each an integer of 1, 2 or 3, and X 1 and X 2 each represent hydrogen, halogen, cyano or nitro.
Claim 4
Dependent Claim
32 words
The liquid crystal composition according to claim 2 wherein said liquid crystal compound is a compound of the following structural formula: ##STR24## wherein m and z are each an integer of 4-15.
Claim 5
Dependent Claim
32 words
The liquid crystal composition according to claim 3 wherein said liquid crystal compound is at least one organic compound selected from the group consisting of p'-n'-octyloxyphenyl p-n-octyloxybenzoate, p'-n'-hexyloxyphenyl p-n-decyloxybenzoate and p'-n'-hexylphenyl p-n-nonanoxybenzoate.
Claim 6
Dependent Claim
96 words
The liquid crystal composition according to claim 1 wherein said optically active substance is a compound of the following general structural formula: ##STR25## wherein R 3 and R 4 each represent --R*, --OR*, --C x H 2x+1 or --OC x H 2x+1 wherein R* represents alkyl containing an asymmetric carbon atom, x is an integer of 1-15, and at least one of R 3 and R 4 is --R* or --OR*, n and s are each an integer of 1, 2 or 3, and X 3 and X 4 each represent hydrogen, halogen, cyano or nitro.
Claim 7
Dependent Claim
36 words
The liquid crystal composition according to claim 5 wherein said optically active substance is a compound of the following structural formula: ##STR26## wherein m is an integer of 1-15, and C is an asymmetric carbon atom.
Claim 8
Dependent Claim
36 words
The liquid crystal composition according to claim 5 wherein said optically active substance is a compound of the following structural formula: ##STR27## wherein m is an integer of 1-15, and C is an asymmetric carbon atom.
Claim 9
Dependent Claim
36 words
The liquid crystal composition according to claim 5 wherein said optically active substance is a compound of the following structural formula: ##STR28## wherein m is an integer of 1-15, and C is an asymmetric carbon atom.
Claim 10
Dependent Claim
16 words
The liquid crystal composition according to claim 6 wherein said optically active substance is p'-act-amyloxyphenyl p-n-hexyloxybenzoate.
Claim 11
Dependent Claim
16 words
The liquid crystal composition according to claim 7 wherein said optically active substance is p-n-hexyloxyphenyl 4-act-amyl-biphenylcarboxylate.
Claim 12
Dependent Claim
16 words
The liquid crystal composition according to claim 8 wherein said optically active substance is p-act-amylphenyl 4-n-octyloxybiphenylcarboxylate.
Claim 13
Dependent Claim
67 words
The liquid crystal composition according to claim 1 wherein said liquid crystal compound is a compound of the following structural formula A and said optically active substance is a compound of the following structural formula B: Structural Formula A ##STR29## Structural Formula B ##STR30## wherein m and z are each an integer of 4-15 m' is an integer of 1-15, and C is an asymmetric carbon atoms.
Claim 14
Dependent Claim
24 words
The liquid crystal composition according to claim 12 wherein said liquid crystal compound is p'-n'-octyloxyphenyl p-n-octyloxybenzoate and said optically active substance is p'-act-amyloxyphenyl p-hexyloxybenzoate.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |