US4798680A
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US
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Optically active compound, process for producing same and liquid crystal composition containing same
Assignee: YAMAKAWA YAKUHIN KOGYO A CORP OF JAPAN KK
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Filing: 1986-10-16
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Granted: 1989-01-17
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Expires: 2006-10-16
Abstract
Abstract An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): <IMAGE> (Ia) wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): <IMAGE> (Ib) wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substituent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
Inventors
- 👤 Hiroyuki Nohira
- 👤 Masanao Kamei
- 👤 Shinichi Nakamura
- 👤 Kazuo Yoshinaga
- 👤 Mariko Kai
- 👤 Kazuharu Katagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:39
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
27 words
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom.
Claim 2
Dependent Claim
27 words
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom.
Claim 3
Dependent Claim
11 words
A compound according to claim 1, wherein said R is hexyl.
Claim 4
Dependent Claim
11 words
A compound according to claim 1, wherein said R is pentyl.
Claim 5
Dependent Claim
11 words
A compound according to claim 1, wherein said R is butyl.
Claim 6
Dependent Claim
11 words
A compound according to claim 1, wherein said R is nonyl.
Claim 7
Dependent Claim
11 words
A compound according to claim 1, wherein said R is heptyl.
Claim 8
Dependent Claim
11 words
A compound according to claim 1, wherein said R is octyl.
Claim 9
Dependent Claim
11 words
A compound according to claim 1, wherein said R is decyl.
Claim 10
Dependent Claim
35 words
A liquid crystal composition containing at least one species of 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR16## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom.
Claim 11
Dependent Claim
35 words
A liquid crystal composition containing at least one species of 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR16## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom.
Claim 12
Dependent Claim
20 words
A liquid crystal composition according to claim 9, which has a temperature range wherein it assumes a chiral smectic phase.
Claim 13
Dependent Claim
18 words
A liquid crystal composition according to claim 10, wherein said chiral smectic phase is chiral smectic C phase.
Claim 14
Dependent Claim
23 words
A liquid crystal composition according to claim 9, which comprises a liquid crystal showing a smectic phase in addition to said 2-fluoro-1-alkanol compound.
Claim 15
Dependent Claim
16 words
A liquid crystal composition according to claim 12, wherein said smectic phase is chiral smectic phase.
Claim 16
Dependent Claim
20 words
A liquid crystal composition according to claim 9, which comprises a nematic liquid crystal in addition to said 2-fluoro-1-alkanol compound.
Claim 17
Dependent Claim
21 words
A liquid crystal composition according to claim 9, which comprises a chiral nematic liquid crystal in addition to said 2-fluoro-1-alkanol compound.
Claim 18
Dependent Claim
21 words
A liquid crystal composition according to claim 12, wherein said liquid crystal showing a smectic phase is a ferroelectric liquid crystal.
Claim 19
Dependent Claim
22 words
A liquid crystal composition according to claim 16, which contains said 2-fluoro-1-alkanol compound in a proportion of 0.1 to 80 wt. %.
Claim 20
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a biphenyl-4-carboxylate unit.
Claim 21
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has an azoxybenzene unit.
Claim 22
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a 2-phenylpyrimidine unit.
Claim 23
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said ferroelectric liquid crystal has a phenylbenzoate unit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |