Patent ID: 6291034
Filing Date: 2001-09-18
Classification: C07C,C07D,C09K

Abstract:
A liquid crystalline material comprising a mixture of compounds at least one of which is a liquid crystalline compound of Formula I:R.sub.1 --A--(X).sub.m --B--R.sub.2 Formula Iwhere A is selected from naphthyl, fluorinated naphthyl and brominated naphthyl,B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, and pyrimidine,R.sub.1 and R.sub.2 each contain 1-15 carbon atoms and are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen,X is selected from COO and C.dbd.C, m is 0 or 1, provided that where A is naphthyl, m is 0 then B is selected from methylated phenyl, brominated phenyl and pyrimidine;provided that when B is pyrimidine, m is 0 and R.sub.2 is CN or alkyl then R.sub.1 is other than alkyl or alkoxy;provided that A and B are not simultaneously naphthyl and pyrimidine respectively;provided that when m is 1 and X is CO.sub.2 then at least one of R.sub.1 or R.sub.2 is thioalkyl; andprovided that when B is methylated phenyl then R.sub.2 is not hydrogen.