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US 5,766,679 AGranted
Chiral nematic polyesters
AssigneeBASF SE
InventorsKarl Siemensmeyer, Frank Meyer, Karl-Heinz Etzbach, Hans R. Kricheldorf, Nicolas Probst
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Abstract
Chiral nematic polyesters comprise as alcohol component chiral diol structural units and as acid component dicarboxylic acid residues comprising mesogenic groups. The polyesters are particularly suitable for surface coating.
Claims8
A chiral nematic polyester comprising as alcohol component chiral diol structural units of the formula ##STR9## where the L radicals are independently of one another C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, COOR, OCOR, CONHR or NHCOR, and R is C.sub.1 -C.sub.4 -alkyl or hydrogen,
- and as acid component dicarboxylic acid residues comprising mesogenic groups.
Dependencies are inferred from the claim text.