Novel tris-azo dyes and liquid crystal compositions made therewi

Details Novel tris-azo dyes and liquid crystal compositions made therewi Novel tris-azo dyes and liquid crystal compositions made therewi

1980-06-30

1982-09-21

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, 260169, 260173, G02F 113, C09K 334, C09B 3116, C09B 3536, C09B 3322

Patent

active

043506038

ABSTRACT:
Novel tris-azo dye compositions and a liquid crystal composition containing the tris-azo dye compositions are disclosed. The tris-azo dye composition having terminal aromatic groups has the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are various aromatic compounds including aromatic amines, substituted aromatic amines, hydroxy-substituted aromatic compounds and substituted hydroxy-containing aromatic compounds. When the tris-azo dichroic dyes are used as a guest dye in a host liquid crystal material, they form a novel liquid crystal composition for use in liquid crystal displays. Examples of R.sub.1 and R.sub.2 include organic radicals of aminoquinoline, tetrahydroquinoline, N-ethyl-1-naphthylamine and 1,8-diaminonaphthalene.

REFERENCES:
patent: 4116861 (1978-09-01), Aftergut et al.
patent: 4122027 (1978-10-01), Cole, Jr. et al.
patent: 4128496 (1978-12-01), Cole, Jr. et al.
patent: 4128497 (1978-12-01), Cole, Jr. et al.
patent: 4137193 (1979-01-01), Osmam
patent: 4141627 (1979-02-01), Bloom et al.
patent: 4145114 (1979-03-01), Coates et al.
patent: 4153343 (1979-05-01), Bloom et al.
Cox, R. J.; Mol. Cryst. Liq. Cryst., vol. 55, pp. 1-32 (1979).
Bloom, A., et al.; Mol. Cryst. Liq. Cryst. (Lett.), vol. 41, pp. 1-4 (1977).
Bloom, A., et al.; Mol. Cryst. Liq. Cryst., vol. 40, pp. 213-221 (1977).
White, D. L., et al., J. Appl. Phys., vol. 45, No. 11, pp. 4718-4723 (1974).

Affiliated with

Also associated with

Rating

Novel tris-azo dyes and liquid crystal compositions made therewi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Novel tris-azo dyes and liquid crystal compositions made therewi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Novel tris-azo dyes and liquid crystal compositions made therewi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2075429