Twisted nematic film, a method for the preparation thereof, and

Details Twisted nematic film, a method for the preparation thereof, and Twisted nematic film, a method for the preparation thereof, and

1993-04-01

1995-01-17

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 76, 528 78, 528 79, 528 85, 427 58, 428 1, 430 20, 430270, C08G 1832

Patent

active

053826485

ABSTRACT:
The invention relates to a twisted nematic film comprising a non-crosslinked liquid-crystalline polymer having a Tg above 75.degree. C. and a rotational viscosity (.gamma.) of less than 5000 Pascal.seconds (Pa.s) between Tg and Tni. Such twisted nematic films are used in displays. The invention further relates to methods for the preparation of these twisted nematic films, to the use of said twisted nematic films for optical data storage and in writable compact disks and to a display device comprising such a twisted film.

REFERENCES:
Kirk Othmer's Encyclopedia of Technology 3rd edition (New York): Wiley & Sons) vol. 7, pp. 726-732.
W. H. de Jeu, Physical Properties of Liquid Crystalline Materials (New York): Gordon and Breach Science Publishers Ltd., 1990)., Chapter 7, pp. 108-110.
G. Vertogen and W. H. de Jeu, Thermotropic Liquid Crystals, Fundamentals (Berlin Heidelberg: Springer-Verlag, 1988), pp. 147-153.
R. P. Raynes, "Macroscopic Properties of Nematic Liquid Crystals" (1989).

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