Compositions – Liquid crystal compositions – Containing pleochroic dye
Reexamination Certificate
2003-11-06
2008-08-26
Visconti, Geraldina (Department: 1795)
Compositions
Liquid crystal compositions
Containing pleochroic dye
C252S299200, C252S299300, C252S299400, C252S299500, C252S299600, C252S299700, C428S001100, C428S001200, C430S020000, C430S270100
Reexamination Certificate
active
07416683
ABSTRACT:
The invention relates to a liquid crystal mixed-composition comprising one or more cellulose derivatives and one or more liquid crystal compounds (preferably low-molecular liquid crystal compound) which can be oriented in a specific direction differing from that of the cellulose derivative, wherein the ratio by weight of the both is preferably in a range from 1:9 to 9:1, a retardation film produced using the composition, a circularly or elliptically polarizing film using the retardation film and an image display device provided with a circularly or elliptically polarizing film. The liquid crystal mixed-composition can be easily oriented in a specific direction on a rubbed substrate. If this orientation is fixed, a retardation film can be easily obtained which has such wavelength dispersion characteristics that the same level of retardation can be imparted to each wavelength in a wide visible region.
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J.Macromol.Sci.-Phys., B34(4), 357-367 (1995); S.H. Jiang et al.; Orientation of Polymer Chains in Oriented (E-CE)C/AA Liquid Crystalline Solutions.
Adv.Mater. 1997, 9, No. 2; Communications/Advanced Materials; Manfred Muller et al.; Solid Opalescent Films Originating from Urethanes of Cellulose.
Fujisawa Hideyoshi
Tanaka Kouichi
Nields & Lemack
Nippon Kayku Kabushiki Kaisha
Polatechno Co., Ltd.
Visconti Geraldina
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