Ferroelectric liquid crystal composition

Details Ferroelectric liquid crystal composition Ferroelectric liquid crystal composition

1992-07-01

1993-08-31

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229965, 25229901, C09K 1934, C09K 1952, C09K 1912

Patent

active

052406385

ABSTRACT:
A ferroelectric liquid crystal composition comprising smectic liquid crystal composition(s) and optically active compounds and having a spontaneous polarization value of 20 nC cm.sup.-2 or less and nevertheless having high rate response properties, and a light-switching element are provided, which composition comprises the following components (A), (B), (C) and (D), in 76-95, 2-10, 1-6 and 2-8 wt.%, respectively, based on the total quantity of the 4 components:
(A): at least one compound of the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, being 1-18C alkyl, or the formula ##STR2## wherein R.sup.3 and R.sup.4 are the same or different, being 1-18C alkyl or alkoxy and having smectic C phase:
(B): an optically active compound of the formula ##STR3## wherein R.sup.5 is 1-18C alkyl or alkoxy, X is ##STR4## Y is halogen or H and * is asymmetric C atom; (C): at least one optically active compound of the formulas ##STR5## wherein R.sup.6 and R.sup.8 are 1-18C alkyl or alkoxy, R.sup.7 and R.sup.9 are 2-18C alkyl or alkoxy and * is an asymmetric C atom; and
(D): at least on optically active compound formula ##STR6## wherein R.sup.10 is 1-18 C alkyl or alkoxy, Z is H or halogen and * is an asymmetric C atom.

REFERENCES:
patent: 4780242 (1988-10-01), Miyazawa et al.
patent: 4834907 (1989-05-01), Inoue et al.
patent: 4882083 (1989-11-01), Terashima et al.
patent: 4882086 (1989-11-01), Terashima et al.
patent: 4892393 (1990-01-01), Terashima et al.
patent: 5021190 (1991-06-01), Kikuchi et al.
patent: 5047171 (1991-09-01), Ohno et al.
patent: 5059340 (1991-10-01), Miyazawa et al.
patent: 5064568 (1991-11-01), Terashima et al.
patent: 5116529 (1992-05-01), Terashima et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2295733