Patent ID: 7994273
Filing Date: 2011-08-09
Classification: C07J,C08G,C09K,G02F

Abstract:
1. A polymer from the class of polyamic acids, polyamic acid esters or polyimides obtained by the reaction of a diamine compound of general formula I with one or more tetracarboxylic acid anhydride of general formula IV: wherein A1 and A2 each independently represent a mesogen group represented by general formula II: wherein C D represents a hydrogen atom, a halogen atom, a cyano group, or a straight-chain or branched alkyl residue which is unsubstituted, mono-substituted by cyano or fluorine, chlorine, or poly-substituted by fluorine, chlorine, having 1 to 24 carbon atoms, wherein one or more non-adjacent —CH S n n B represents a group selected from —O—, —CO—, —CO—O—, —O—CO—, —NR wherein T represents a tetravalent organic radical.