Liquid-crystal material

Abstract

Abstract Liq. crystalline material contg. dyestuff for use in guest-host displays contains a mixt. of at least 2 cpds., forming a nematic phase with positive dielectric anisotropy, of formula R1-(A1)m-Z1-A2-Z2-(A3)n-R2 (I) (where R1-2 = 1-10C alkyl or alkoxy opt. with 1 or 2 O atoms in the chain, F, Cl, Br, CN, CF3, or NO2; A1-3 = (substd.) 1,4- phenylene, 1,4-cyclohexylene, 1,3-dioxan-2,5-diyl, piperidin-1,4-diyl, 1,4-bicyclo-(2,2,2) -octylene or pyrimidin-2,5-diyl; Z1-2 = a direct bond, -O-C(O)-, -C(O)-O-, -CH2O, -OCH2- or -CH2CH2-; m = 1 or 2; n = 0 or 1). The mixt. contains 10-60(20-40) wt.% cpds(s). contg. CN gps. and 0-1(0-0.5)wt.% cpd(s). contg. ester gps.

Inventors

• 👤 Uwe Dr. Claussen

Bibliographic Details