| abstract |
PCT No. PCT/EP93/00989 Sec. 371 Date Jun. 25, 1993 Sec. 102(e) Date Jun. 25, 1993 PCT Filed Apr. 23, 1993 PCT Pub. No. WO93/22397 PCT Pub. Date Nov. 11, 1993An electrooptical system is disclosed in which a PDLC film is positioned between 2 electrode layers. The PDLC film contains a liquid crystal mixture forming microdroplets in an optically isotropic, transparent polymer matrix. The liquid crystal mixture comprises one or more compounds of formula I <IMAGE> I wherein R, A1, A2, Z1, Z2, X1, X2, Q, Y and n as herein defined, and one or more reactive liquid crystalline compounds. The PDLC film exhibits improved switching times, especially at low temperatures. |