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US4892675A
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Optically active polymer and liquid crystal composition containing same
Assignee: Canon Inc
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Filing: 1988-06-07
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Granted: 1990-01-09
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Expires: 2008-06-07
Abstract
Abstract An optically active polymer comprises recurring units of the following formula: ##STR1## wherein l is an integer of 5-1000, n is an integer of 1-3, m is an integer of 2-20, and * denotes the location of an asymmetric center. The optically active polymer has a good mutual solubility with a low-molecular weight mesomorphic compound and is easily mixed with the latter to provide a uniform liquid crystal composition which shows ferroelectricity and better film formability and stability than the low-molecular weight mesamorphic compound alone.
Inventors
- 👤 Hiroyuki Nohira
- 👤 Kazutaka Arai
- 👤 Kazuo Yoshinaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:09
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C09; C09K; C09K19/00; C09K19/04; C09K19/38
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
41 words
An optically active polymer comprising recurring units of the following formula (I): ##STR7## wherein l is an integer of 5-1000, n is an integer of 1-3, m is an integer of 2-20, and * denotes the location of an asymmetric center.
Claim 2
Dependent Claim
41 words
An optically active polymer comprising recurring units of the following formula (I): ##STR7## wherein l is an integer of 5-1000, n is an integer of 1-3, m is an integer of 2-20, and * denotes the location of an asymmetric center.
Claim 3
Dependent Claim
20 words
A polymer according to claim 1, wherein n is an integer of 1-2 and m is an integer of 2-10.
Claim 4
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 1 and m is 4 in the formula (I).
Claim 5
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 1 and m is 6 in the formula (I).
Claim 6
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 1 and m is 8 in the formula (I).
Claim 7
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 1 and m is 10 in the formula (I).
Claim 8
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 1 and m is 7 in the formula (I).
Claim 9
Dependent Claim
18 words
A polymer according to claim 1, wherein n is 2 and m is 10 in the formula (I).
Claim 10
Dependent Claim
18 words
A liquid crystal composition, comprising: said optically active polymer of claim 1 and a non polymeric mesomorphic compound.
Claim 11
Dependent Claim
10 words
A composition according to claim 9, which shows ferroelectric properties.
Claim 12
Dependent Claim
16 words
A composition according to claim 9, wherein said non polymeric mesomorphic compound shows a smectic phase.
Claim 13
Dependent Claim
16 words
A composition according to claim 11, wherein said non polymeric mesomorphic compound shows chiral smectic phase.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |