| 摘要 |
1. Information carrier based on liquid crystals, characterized in that the liquid cristals occur in the form of homopolymers or copolymers P which are synthesised wholly or predominantly from monomers of formula l see diagramm : EP0188785,P4,F1 wherein R represents hydrogne, methyl or ethyl X represents a group -O-, NR1 or S, wherein R1 represents hydrogen or methyl Y represents a (linear) spacing chain with at least 2 chain members, Z represents the mesogenic group of formula see diagramm : EP0188785,P4,F2 wherein A represents a bridge consisting of a group see diagramm : EP0188785,P4,F3 and R2 represents the wing group Q or see diagramm : EP0188785,P4,F4 or see diagramm : EP0188785,P4,F5 wherein Q and Q' represent hydrogen -(CH2 )n H, -O-(CH2 )n H, -COO(CH2 )n H, -CN or halogen, m represents zero or one and n represents a number from 1 to 8, with proviso that 1) the polymers P show at least one transition from nematic or smetic to isotropic, 2) the polymers P have been obtained from a homogeneous solution. |
