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US 5,744,057 AGranted
Polymerizable, chiral compounds, and use thereof
AssigneeBASF Aktiengesellshaft
InventorsFrank Meyer, Karl Siemensmeyer, Karl-Heinz Etzbach, Peter Schuhmacher
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Abstract
A polymerizable, chiral compound of the formula (I): (Z--Y.sup.1 -A-O--CO--O-M-Y.sup.2).sub.n X (I) where: A, M, Y.sup.1 and Y.sup.2, X, n and Z are as defined herein; and which compound is suitable for use in electro-optical displays or as chiral dopes for nematic or cholesteric liquid crystals for the production of layers which reflect in colors.
Claims17
A polymerizable, chiral compound of the formula
- (Z--Y.sup.1 -A-O--CO--O-M-Y.sup.2).sub.n X I
- where
- A is a spacer,
- M is a mesogenic group,
- Y.sup.1 and Y.sup.2 are chemical bonds or --O--, --S--, --CO--O--, --O--CO--, --O--CO--O--, --CO--N(R)-- or --N(R)--CO--,
- X is an n-valent chiral radical,
- R is hydrogen or C.sub.1 -C.sub.4 -alkyl,
- n is from 2 to 6,
- Z
- a1) at least one of these radicals is a reactive group which can participate in a polyaddition reaction,
- a.sub.2) at least two of these radicals are substituents carrying a reactive group which can participate in a polycondensation reaction,
- b) is hydrogen or an unreactive radical so long as condition (a.sub.1) or (a.sub.2) is satisfied,
- where Z, Y.sup.1, A, M and Y.sup.2, since they occur n times in I, can be identical or different.
10 more elements
Dependencies are inferred from the claim text.