Optically active polyester, photoreactive chiral agent, liquid crystal composition, liquid crystal color filter, optical film, recording medium, method of changing the helical structure of a liquid crystal, and method of fixing the helical structure of a liquid crystal
AssigneeFuji Photo Film Co., Ltd.
InventorsMasatoshi Yumoto, Mitsuyoshi Ichihashi, Kouya Kawabata
Life of this patent
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Abstract
The present invention discloses an optically active polyester comprising at least constituent units represented by the general formula (I) and the general formula (II): 1 wherein Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group, 2 wherein A represents a bivalent substituent.
Claims19
An optically active polyester comprising:
- a constituent unit represented by the general formula (I):
- 120
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- 121
- in which A represents a bivalent substituent.
A photoreactive chiral agent comprising an optical active polyester which includes:
- a constituent unit represented by the following general formula (I):
- 122
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- in which A represents a bivalent substituent.
- 123
A liquid crystal composition comprising a liquid crystal compound and at least one optically active polyester which includes:
- a constituent unit represented by the following general formula (I):
- in which Ar1 and Ar2 each independently represents a bivalent aromatic
- 124
- group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- 125
- in which A represents a bivalent substituent.
A method for changing helical structure of a liquid crystal, the method comprising the steps of:
- preparing a liquid crystal composition including a liquid crystal compound and at least one optically active polyester which includes
- a constituent unit represented by the following general formula (I):
- 126
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group, and
- a constituent unit represented by the following general formula (II):
- 127
- in which A represents a bivalent substituent;
- and
- irradiating the liquid crystal composition with light for changing the structure of the optically active polyester.
A method for fixing helical structure of a liquid crystal, the method comprising the steps of:
- preparing a liquid crystal composition including a liquid crystal compound, a photopolymerization initiator and at least one optically active polyester which includes
- a constituent unit represented by the following general formula (I):
- 128
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group, and
- a constituent unit represented by the following general formula (II):
- 129
- in which A represents a bivalent substituent;
- irradiating the liquid crystal composition with light in a photosensitivity wavelength range of the optically active polyester;
- and
- then, irradiating the liquid crystal composition with light in a photosensitivity wavelength range of the photopolymerization initiator for carrying out photopolymerization.
A liquid crystal color filter comprising a liquid crystal compound and at least one optically active polyester which includes:
- a constituent unit represented by the following general formula (I):
- 130
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- 131
- in which A represents a bivalent substituent.
An optical film comprising a liquid crystal compound and at least one optically active polyester which includes:
- a constituent unit represented by the following general formula (I):
- 132
- in which Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- 133
- in which A represents a bivalent substituent.
A recording medium comprising a liquid crystal compound and at least one optically active polyester which includes:
- a constituent unit represented by the following general formula (I):
- in which Ar1 and Ar2 each independently represents a bivalent aromatic
- 134
- group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group;
- and
- a constituent unit represented by the following general formula (II):
- 135
- in which A represents a bivalent substituent.
Dependencies are inferred from the claim text.