Patent ID: 8053039
Filing Date: 2011-11-08
Classification: C09B,C09K

Abstract:
1. A polymerizable dichroic azo dye of the general formula I: wherein: A is a dichroic residue represented by formulae IIIa or IIIb: wherein Ar q G  which are unsubstituted, mono- or poly-substituted by fluorine, chlorine, hydroxy, —NR  wherein the broken line (i) symbolizes the possible linkages to the azo-binding group and wherein M represents 1,4-phenylene, 1,4-naphthylene which are unsubstituted, mono- or poly-substituted by fluorine, chlorine, hydroxy, —NR T represents a group of substructure IV  wherein V is selected from a group consisting of a single covalent bond, —CH with the proviso that if G 1 , G 2 and M are optionally substituted 1,4-phenylene, at least one of Ar 1 , Ar 2 , Ar 3 or Ar 4 is optionally substituted 1,4-naphthylene; B represents a group of substructure II  wherein the broken line (ii) symbolizes the linkage to said dichroic residue and wherein: with the proviso that the compound of formula I comprises at least one polymerizable group PG within the above given meaning.