Liquid crystal composition

Details Liquid crystal composition Liquid crystal composition

1988-08-12

1992-05-19

Maples, John S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 2522996, 25229961, 25229963, 25229964, 25229966, 25229967, 25229968, C09K 1912, C09K 1920, C09K 1934, C09K 1930

Patent

active

051146142

ABSTRACT:
A nematic liquid crystal composition having a notable increase of the twistability (i.e. the reciprocal of the intrinsic helical pitch) with temperature rise is provided, which composition comprises (i) optically active substance(s) which are the same in the helical twist sense to one another and make positive the temperature dependency of the twistability of the cholesteric phase induced when singly added to nematic compound(s), and (ii) nematic liquid crystal(s), which optically active substance(s) are a specificed compound (I) containing a plurality of benzene, cyclohexane, dioxane, pyrimidine or/and pyridine ring and also having an optically active terminal group ##STR1## (R.sup.1 : alkyl); and further a nematic composition having a nearly constant twistability with temperature rise is provided, which composition comprises the above compound (I), optically active substance(s) which have the same helical twist sense as that of (I) and make negative the temperature dependency of the twistability of the induced cholesteric phase when singly added to nematic compound(s) and nematic liquid crystal(s), which latter optically active substance(s) are a specified compound (II) containing a plurality of benzene, cyclohexane dioxane, pyrimidine or/and pyridine group and having an optically active terminal group ##STR2## (W: a specified group, S: 0-4, and R.sup.5 : alkyl).

REFERENCES:
patent: 3792915 (1974-02-01), Soo Oh et al.
patent: 3923685 (1975-12-01), Soo Oh et al.
patent: 4143947 (1979-03-01), Aftergut et al.
patent: 4264148 (1981-04-01), Gobl-Wunsch et al.
patent: 4668427 (1987-05-01), Saito et al.
patent: 4689176 (1987-08-01), Inoue et al.
patent: 4761246 (1988-08-01), Inukai et al.
patent: 4765924 (1988-08-01), Inoue et al.
patent: 4801756 (1989-01-01), Kano et al.
patent: 4818430 (1989-04-01), Saito et al.
patent: 4824597 (1989-04-01), Kano et al.
patent: 4826621 (1989-05-01), Terashima et al.
patent: 4834907 (1989-05-01), Inoue et al.
patent: 4835274 (1989-05-01), Kano et al.
patent: 4865763 (1989-09-01), Inoue et al.
patent: 4866199 (1989-09-01), Shibata et al.
patent: 4880936 (1989-11-01), Sasaki et al.
patent: 4886622 (1989-12-01), Miyazawa et al.
patent: 4911861 (1990-03-01), Higuchi et al.
patent: 4925592 (1990-05-01), Kano et al.
patent: 4946989 (1990-08-01), Kawamura et al.
patent: 4959173 (1990-09-01), Shibata et al.
patent: 4961874 (1990-10-01), Takeuchi et al.
patent: 4980082 (1990-12-01), Ohba et al.
patent: 4980083 (1990-12-01), Shibata et al.
patent: 4988458 (1991-01-01), Heppke et al.
patent: 4997942 (1991-03-01), Osawa et al.
Flussige Kristalle in Tabellen, Demus, D. Ed., VEB Deutscher Verlag fur Grundstoffindustrie, Leipzig, pp. 65-68, 1974.
Gray, G. W. et al., Mol. Cryst. Liq. Cryst., 48(1-2), 37, 1978.
Schaeffer et al., 1985 SID International Symposium Digest of Technical Papers, pp. 120-123.
Nakagawa et al., SID International Symposium Digest of Technical Papers, pp. 78-80.
Baur et al., 15 Freiburger Arbeitstagung Flussigkristalle (Mar. 1985).

Affiliated with

Also associated with

Rating

Liquid crystal composition does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal composition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2415974