Fast response liquid-crystal mixts. cotng. three homologous p-p'-di: substd.-benzoic-acid-phenyl-esters of formula (III) are prepd. from p-substd. benzoic acid of formula (I) directly or in soln. with p-substd. phenols of formula (II) in the presence of an acid or base catalyst. The substituents are: R1=6-10C alkyl or alkyl-oxy gps. and R2=4-8C alkyl or alkyl-oxy gps.(0/0)
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