US4882084A
Expired / Lapsed
US
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Optically active substituted biphenyl compounds
Assignee: JNC Corp
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Filing: 1987-10-28
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Granted: 1989-11-21
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Expires: 2007-10-28
Abstract
Abstract The optically active compounds of the formula: ##STR1## wherein R 1 is an alkyl or an alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, and A is a biphenyl group or a biphenyl group having a halogen atom or a cyano group are provided. The optically active compounds are useful for liquid crystal elements, especially for components of ferroelectric liquid crystal mixtures inducing high value of spontaneous polarization.
Inventors
- 👤 Kouji Ohno
- 👤 Shinichi Saito
- 👤 Kazutoshi Miyazawa
- 👤 Makoto Ushioda
- 👤 Hiromichi Inoue
- 👤 Naoyuki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:13
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/002; C12P13/004; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/52; C09K19/58; C09K19/586; C12P41/00; C12P41/003; C12P41/004; C12P7/00; C12P7/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
An optically active compound of the formula: ##STR13## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, A is ##STR14## and X is a halogen atom or a cyano group.
Claim 2
Dependent Claim
48 words
An optically active compound of the formula: ##STR13## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, A is ##STR14## and X is a halogen atom or a cyano group.
Claim 3
Dependent Claim
29 words
An optically active compound as claimed in claim 1, wherein R 1 is an octyloxy group, R 2 is a pentyl group and A is a biphenyl-4, 4'-diyl group.
Claim 4
Dependent Claim
25 words
An optically active compound as claimed in claim 1, wherein R 1 and R 2 is a pentyl group and A is a biphenyl-44'-diyl group.
Claim 5
Dependent Claim
65 words
A ferroelectric liquid crystal mixture comprising at least one smectic liquid crystal compound and at least one optically active compound of the general formula: ##STR15## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, a is ##STR16## and X is a halogen atom or a cyano group.
Claim 6
Dependent Claim
65 words
A ferroelectric liquid crystal mixture comprising at least one smectic liquid crystal compound and at least one optically active compound of the general formula: ##STR15## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, a is ##STR16## and X is a halogen atom or a cyano group.
Claim 7
Dependent Claim
71 words
A light switching element which comprises a ferroelectric liquid crystal mixture comprising at least one smectic liquid crystal compound and at least one optically active compound of the general formula: ##STR17## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, A is ##STR18## and X is a halogen atom or a cyano group.
Claim 8
Dependent Claim
71 words
A light switching element which comprises a ferroelectric liquid crystal mixture comprising at least one smectic liquid crystal compound and at least one optically active compound of the general formula: ##STR17## wherein R 1 is an alkyl or alkyloxy group having a carbon number of 1-18, R 2 is an alkyl group having a carbon number of 1-18, A is ##STR18## and X is a halogen atom or a cyano group.
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