| abstract |
The present invention provides novel compounds which are particularly useful for the alignment, in particular the optical alignment of secondary materials, especially liquid crystals, for security or optical or electrooptical applications such as liquid crystal devices or optical or electrooptical films. SOLUTION: Formula (I): [Wherein, Ar 1 and Ar 2 are, independently of one another, a ring system of 4 to 40 atoms, each ring system contains one or more unsaturations, X is hydrogen and Y is When R 1 is CN, R 1 , R 2 or R 3 independently of one another are hydrogen, halogen or —CF 3 , provided that R 1 , R 2 or R 3 are not simultaneously hydrogen] The compound concerned. 【Selection chart】 None |