Patent ID: 6569355
Filing Date: 2003-05-27
Classification: A61K,A61Q,C07D,C07H,C09K

Abstract:
A method for producing a liquid crystalline composition which comprises doping a nematic or cholesteric base material for the generation of layers which reflect in color in the UV or IR region or for the preparation of pigments having a liquid-crystalline, cholesteric order with a compound of the formula I in which the substituents have the following meanings:R1 is Z1â€”Y1â€”(A1)mâ€”Y2â€”M1â€”Y3â€”(A2)nâ€”Y4â€”; R2 is Z2â€”Y5â€”(A3)oâ€”Y6â€”M2â€”Y7â€”(A4)pâ€”Y11â€”; R3 and R4 are hydrogen; A1 to A4 are spacers having a chain length of from 1 to 6 carbon atoms; Y1 to Y7 are chemical bonds, â€”Oâ€”, â€”Sâ€”, â€”C(&boxH;O)â€”, â€”C(&boxH;O)â€”Oâ€”, â€”Oâ€”C(&boxH;O)â€”; Y11 is a chemical bond, â€”C(&boxH;O)â€” or â€”Oâ€”C(&boxH;O)â€”; M1 and M2 are mesogenic radicals selected from the group consisting of: Z1 and Z2 are hydrogen, C4-C10-alkyl, polymerizable groups or radicals carrying polymerizable groups; m is 0 or 1; n is 0; o is 0 or 1; and p is 0, where at least one of the radicals Y3 and Y4 or Y7 and Y11 is a chemical bond.