| abstract |
The invention relates to polymerizable liquid-crystalline compounds characterized by the general formula (I) wherein A 1 and A 2 are the same or different and each represents a crosslinkable group; the radicals X are the same or different and are each for a single bond, -O-, -S-, -C = N-, -O-CO-, -CO-O-, -O-CO-O-, -CO- NR-, -NR-CO-, -NR-, -O-CO-NR, -NR-CO-O-, -CH 2 -O- or -NR-CO-NR, where R is H or C 1 -C 4 alkyl; and M represents a mesogenic group, processes for their preparation and their use for the production of cholesteric phases. |