Propargyl-terminated nematic or cholesteric polymers

摘要

Propargyl-terminated nematic or cholesteric polyesters, polycarbonates or mixtures thereof (I) are new, except for diesters of formula P-A<1>-A-A<2>-P (Ia), in which A = 1,4-phenylene (Phe), 4,4'-biphenylene, 2,6-naphthylene or -Phe-CR=CR-Phe- (with R = H or CH3) (all optionally substituted with halogen, nitro, alkyl, alkoxy, fluoroalkyl, fluoroalkoxy or phenyl); A<1>, A<2> = -Phe-COO- or -Phe-OCO-; and P = HC?=CCH2O-. Also claimed are (i) crosslinked polyesters or polycarbonates or nematic or cholesteric mixtures thereof obtained by heating (I); (ii) pigments and coating materials containing (I) or crosslinked (I); (iii) compounds of formula (II) or their amides or acid halides, in which A<1>-A<4> = H, alkyl, alkoxyalkyl, optionally alkyl- substituted cycloalkyl, halogen or nitro, preferably H; X = S, O or NR<2>; R<2> = H, 1-4C alkyl or phenyl; and R<3> = H, 1-4C alkyl, aryl or aryl-(1-4C alkyl).