Poly(2,6-piperazinedione) alignment layer for liquid crystal dis

Details Poly(2,6-piperazinedione) alignment layer for liquid crystal dis Poly(2,6-piperazinedione) alignment layer for liquid crystal dis

1993-12-02

1996-05-28

Kelly, Cynthia Harris

Compositions

Liquid crystal compositions

Containing nonchiral aligning agents

428 1, 4284735, 359 75, 528353, 2522996, 25229901, C09K 1956, C09K 1900, G02F 113, C08G 6926

Patent

active

055208452

ABSTRACT:
A poly(2,6-piperazinedione) liquid crystal alignment film providing high voltage holding ratio and high tilt angle when used in active matrix and super twisted nematic liquid crystal displays.

REFERENCES:
patent: 4536564 (1985-08-01), Woo
patent: 5129727 (1992-07-01), Hanyu et al.
patent: 5135678 (1992-08-01), Murata et al.
patent: 5152918 (1992-10-01), Murata et al.
Chemical Abstracts, vol. 74, No. 14, 5 Apr. 1971, Columbus, Ohio, abstract No. 64677m, Y. Iwakura `Poly[(2,5-dioxo-1,4-piperazinediyl)arylenes`.
Chemical Abstracts, JP, A 45 020 306 (Asahi Chemicals) 10 Jul. 1990.
Imai, S. and Urayama, K. "Synthesis and Properties of Poly-2,6-Piperazinediones." Kobunshi Kagaku, vol. 29, No. 329 (1972), pp. 610-614.
Imai, Y. "Poly-2,6-piperazinedione." Die Makromolekulare Chemie, vol. 138 (1970), pp. 293-297.

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