US4775223A
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Lactic acid derivative, liquid crystal composition containing same and liquid crystal device
Assignee: Canon Inc
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Filing: 1985-09-17
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Granted: 1988-10-04
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Expires: 2005-09-17
Abstract
Abstract An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R is a saturated or unsaturated hydrocarbon group of a linear, branched or cyclic structure having 4 to 20 carbon atoms; Ra is --CO--Rb or --CH 2 --Rc wherein Rb is a releasable chemically active group, and Rc is a releasable chemically active group; and C with * represents an asymmetric carbon atom.
Inventors
- 👤 Kazuo Yoshinaga
- 👤 Kazuharu Katagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:24
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C291/00; C07C291/02; C07C291/08; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C59/00; C07C59/125; C07C59/40; C07C59/58; C07C59/64; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/20; C09K19/2007; C09K19/2021; C09K19/24; C09K19/26; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463; Y; Y10; Y10S; Y10S534/00; Y10S534/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
52 words
An optically active lactic acid derivative represented by the formula ##STR87## wherein R 1 is an alkyl or alkoxy group having 1 to 20 carbon atoms, R A is an alkyl group having 1 to 20 carbon atoms, n is 0 or 1, and C with * is an asymmetric carbon atom.
Claim 2
Dependent Claim
52 words
An optically active lactic acid derivative represented by the formula ##STR87## wherein R 1 is an alkyl or alkoxy group having 1 to 20 carbon atoms, R A is an alkyl group having 1 to 20 carbon atoms, n is 0 or 1, and C with * is an asymmetric carbon atom.
Claim 3
Dependent Claim
27 words
A lactic acid derivative according to claim 1, which is a compound represented by the following formula (1): ##STR88## wherein R A is a linear alkyl group.
Claim 4
Dependent Claim
26 words
A lactic acid derivative according to claim 1, which is a compound represented by the following formula (2): ##STR89## wherein R A is a linear-alkyl group.
Claim 5
Dependent Claim
11 words
A lact,ic acid derivative according to claim 2, which is 4'-hexyl-4-α-butoxypropanoyloxyazobenzene.
Claim 6
Dependent Claim
11 words
A lactic acid derivative according to claim 2, which is 4'-heptyl-4-α-bytoxypropanoyloxyazobenzene.
Claim 7
Dependent Claim
11 words
A lactic acid derivative according to claim 2, which is 4'-octyl-4-α-butoxypropanoyloxyazobenzene.
Claim 8
Dependent Claim
11 words
A lactic acid derivative according to claim 2, which is 4'-hexyl-4-α-bytoxypropanoyloxyazobenzene.
Claim 9
Dependent Claim
11 words
A lactic acid derivative according to claim 2, which is 4'-octyl-4-α-heptyloxypropanoyloxyazobenzene.
Claim 10
Dependent Claim
11 words
A lactic acid derivative according to claim 2, which is 4'-hexyloxy-4-α-heptyloxypropanoyloxyazobenzene.
Claim 11
Dependent Claim
11 words
A lactic acid derivative according to claim 3, which is 4'-hexyloxy-4-α-butoxypropanoyloxyazoxybenzene.
Claim 12
Dependent Claim
11 words
A lactic acid derivative according to claim 3, which is 4'-octyl-4-α-heptyloxypropanoyloxyazoxybezene.
Claim 13
Dependent Claim
11 words
A lactic acid derivative according to claim 3, which is 4'-hexyloxy-4-α-heptyloxypropanoyloxyazoxybenzene.
Claim 14
Dependent Claim
43 words
A liquid crystal composition comprising 0.01 to 100 parts by weight of a lactic acid derivative according to claim 1, and 100 parts by weight of another liquid crystal component selected from the group consisting of ferroelectric liquid crystals and cholesteric liquid crystals.
Claim 15
Dependent Claim
22 words
A liquid crystal composition according to claim 13, wherein said another liquid crystal component is a Schiff base-type ferroelectric liquid crystal compound.
Claim 16
Dependent Claim
21 words
A liquid crystal composition according to claim 13, wherein said another liquid crystal component is an ester-type ferroelectric liquid crystal compound.
Claim 17
Dependent Claim
21 words
A liquid crystal composition according to claim 13, wherein said another liquid crystal component is an azoxy-type ferroelectric liquid crystal compound.
Claim 18
Dependent Claim
21 words
A liquid crystal composition according to claim 13, wherein said another liquid crystal component is a biphenyl-type ferroelectric liquid crystal compound.
Claim 19
Dependent Claim
22 words
A liquid crystal composition according to claim 13, wherein said another liquid crystal component is a liquid crystal material showing cholesteric phase.
Claim 20
Dependent Claim
24 words
A liquid crystal composition according to claim 13 wherein said another liquid crystal component is a liquid crystal material showing a chiral smectic phase.
Claim 21
Dependent Claim
18 words
A liquid crystal composition according to claim 19, wherein said chiral smectic phase is chiral smectic C phase.
Claim 22
Dependent Claim
82 words
A liquid crystal device comprising a pair of base plates and a liquid crystal material having a smectic phase and a higher temperature phase; said liquid crystal material comprising a mesomorphic, optically active lactic acid derivative represented by the formula ##STR90## wherein R 1 is an alkyl or alkoxy group having 1 to 20 carbon atoms, R A is an alkyl group having 1 to 20 carbon atoms, n is 0 or 1, and C with * is an asymmetric carbon atom.
Claim 23
Dependent Claim
82 words
A liquid crystal device comprising a pair of base plates and a liquid crystal material having a smectic phase and a higher temperature phase; said liquid crystal material comprising a mesomorphic, optically active lactic acid derivative represented by the formula ##STR90## wherein R 1 is an alkyl or alkoxy group having 1 to 20 carbon atoms, R A is an alkyl group having 1 to 20 carbon atoms, n is 0 or 1, and C with * is an asymmetric carbon atom.
Claim 24
Dependent Claim
30 words
A liquid crystal device according to claim 21, wherein said mesomorphic compound is a compound represented by the following formula (1): ##STR91## wherein R A is a linear alkyl group.
Claim 25
Dependent Claim
30 words
A liquid crystal device according to claim 21, wherein said mesomorphic compound is a compound represented by the following formula (2): ##STR92## wherein R A is a linear alkyl group.
Claim 26
Dependent Claim
48 words
A liquid crystal device according to claim 21, wherein at least one of said pair of base plates has a surface having an effect of orienting the direction of the molecular axes of liquid crystal molecules constituting the liquid crystal material contacting the surface preferentially in one direction.
Claim 27
Dependent Claim
17 words
A liquid crystal device according to claim 24, where said orientation effect has been imparted by rubbing.
Claim 28
Dependent Claim
23 words
A liquid crystal device according to claim 24, wherein said orientation effect has been provided with a film formed by oblique vapor deposition.
Claim 29
Dependent Claim
21 words
A liquid crystal device according to claim 21, wherein said higher temperature phase is isotropic phase, cholesteric phase or nematic phase.
Claim 30
Dependent Claim
37 words
A liquid crystal device according to claim 21, wherein said liquid crystal material causes successive phase transition of isotrophic phase, cholesteric phase, smectic A phase and a chiral smectic phase in the order named upon temperature decreases.
Claim 31
Dependent Claim
33 words
A liquid crystal device according to claim 21, wherein said liquid crystal material causes successive phase transition of isotropic phase, cholesteric phase and chiral smectic phase in the order named upon temperature decrease.
Claim 32
Dependent Claim
35 words
A liquid crystal device according to claim 21 wherein said liquid crystal material causes successive phase transition of isotropic phase, smectic A phase and a chiral smectic phase in the order named upon temperature decrease.
Claim 33
Dependent Claim
104 words
A liquid crystal device according to claim 21 which comprises a plurality of picture elements arranged in a plurality of rows, each picture element comprising a pair of oppositely spaced electrodes, said liquid crystal material being disposed between the pair of electrodes, wherein said device is adapted for a line-by-line driving scheme wherein a writing signal is applied to said plurality of picture elements row by row in a writing cycle, and the thus written states of a particular row of picture elements are retained until a fresh writing signal is applied to the particular row of picture elements in a subsequent writing cycle.
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