The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4′-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl, heteroarylalkyl, (cycloalkyl)alkyl, fluoroalkyl or siloxane side groups....http://www.google.de/patents/US7022809?utm_source=gb-gplus-sharePatent US7022809 - Polyimides for anchoring liquid crystals, display devices including same and method for the preparation of said devices
