| abstract |
PCT No. PCT/EP95/03045 Sec. 371 Date Apr. 21, 1997 Sec. 102(e) Date Apr. 21, 1997 PCT Filed Jul. 31, 1995 PCT Pub. No. WO96/05159 PCT Pub. Date Feb. 22, 1996A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I in which R, Y, A1, A2, Z1, Z2, L1 and m are as defined herein. |