Patent EP0295106A2 successfully refreshed from Google Patents.
EP0295106A2
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Optically active polymer and liquid crystal composition containig same
Assignee: Canon Inc
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Filing: 1988-06-09
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Granted: —
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Expires: 2008-06-09
Abstract
Abstract An optically active polymer comprises recurring units of the following formula: 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 mesomorphic compound alone.
Inventors
- 👤 Hiroyuki Nohira
- 👤 Kazutaka Arai
- 👤 Kazuo Yoshinaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 18:05
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: 24
Claim 1
Independent Claim
46 words
An optically active polymer comprising recurring units of the following formula (I): 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
46 words
An optically active polymer comprising recurring units of the following formula (I): 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
24 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
21 words
A liquid crystal composition comprising: said optically active polymer of any of claims 1 to 8 and a liquid crystal material.
Claim 11
Dependent Claim
18 words
A composition according to Claim 9, wherein the liquid crystal material is a low molecular weight mesomorphic compound.
Claim 12
Dependent Claim
11 words
A composition according to Claim 9 or 10, which shows ferroelectricity.
Claim 13
Dependent Claim
18 words
A composition according to claim 10 or 11, wherein said low-molecular weight mesomorphic compound shows a smectic phase.
Claim 14
Dependent Claim
17 words
A composition according to Claim 12, wherein said low-molecular weight mesomorphic compound shows a chiral smectic phase.
Claim 15
Dependent Claim
31 words
A composition according to any of claims 9 to 13, comprising 10 to 85 wt% of the polymer of Claim 1 and 90 to 15 wt% of the liquid crystal material.
Claim 16
Dependent Claim
29 words
A composition according to Claim 14 comprising a lesser amount by weight of the polymer of Claim 1 and a greater amount by weight of the liquid crystal material.
Claim 17
Dependent Claim
24 words
A composition according to Claim 15, comprising the polymer of Claim 1 and the liquid crystal material in about equal amounts by weight .
Claim 18
Dependent Claim
29 words
A composition according to Claim 16, comprising a greater amount by weight of the polymer of Claim 1 and a lesser amount by weight of the liquid crystal material.
Claim 19
Dependent Claim
23 words
A liquid crystal composition comprising a low molecular weight mesomorphic compound and an optically active polymer having asymmetric centres in its polymer chain.
Claim 20
Dependent Claim
23 words
A liquid crystal composition comprising a low molecular weight mesomorphic compound and an optically active polymer having asymmetric centres in its polymer chain.
Claim 21
Dependent Claim
19 words
A composition as claimed in Claim 18, wherein the polymer chain comprises recurring units each having two asymmetric centres.
Claim 22
Dependent Claim
75 words
A method for making an optically active polymer having recurring units of the formula (I) defined in Claim 1, which comprises esterifying a diol of the formula (III): HO - (CH₂) m - OH - (III) wherein m is an interger from 2 - 20 with an acid halide of formula (II). wherein x represents a halogen atom, m represents an interger from 1 to 3 and * represents the location of an asymmetric center.
Claim 23
Dependent Claim
28 words
A method according to Claim 20, wherein the esterification is carried out at a molar ratio of acid halide II to diol III of about 0.7 to 1.3.
Claim 24
Dependent Claim
38 words
A liquid crystal device containing a polymer as claimed in any of claims 1 to 8 or made by the method of claim 20 or 21 or a composition as claimed in any of claims 9 to 19.
References Cited (Backward Citations)
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