US 6,136,225 A · Polymerizable liquid-crystalline compounds

Abstract

Polymerizable liquid-crystalline compounds of the formula I Z.sup.1 --Y.sup.1 --A.sup.1 --Y.sup.3 --M--Y.sup.4 --A.sup.2 --Y.sup.2 --Z.sup.2 I where Z.sup.1 and Z.sup.2 are radicals containing reactive groups via which polymerization can be effected, Y.sup.1 -Y.sup.4 are a single chemical bond, oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, where at least one of the groups Y.sup.3 and Y.sup.4 is --O--CO--O--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, A.sup.1 and A.sup.2 are spacers having 2 to 30 carbon atoms in which the carbon chain may be interrupted by ether oxygen, thioether sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups, M is a mesogenic group, R is C.sub.1 -C.sub.4 -alkyl, and compositions comprising them are distinguished by favorable liquid-crystalline phase-temperature ranges and can be used in optical display devices and in cholesteric liquid-crystalline colorants.

Claims19

Dependent claims

A polymerizable liquid-crystalline compound of the formula I

Z.sup.1 --Y.sup.1 --A.sup.1 --Y.sup.3 --M--Y.sup.4 --A.sup.2 --Y.sup.2 --Z.sup.2 I
where
Z.sup.1 and Z.sup.2 are radicals containing reactive groups via which polymerization can be effected,
Y.sup.1 -Y.sup.4 are a single chemical bond, oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, where at least one of the groups Y.sup.3 and Y.sup.4 is --O--CO--O--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--,
A.sup.1 and A.sup.2 are spacers having 2 to 30 carbon atoms in which the carbon chain may be interrupted by ether oxygen, thioether sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups,
M is a mesogenic group,
R is C.sub.1 -C.sub.4 -alkyl.

4 more elements

A liquid-crystalline compound of the formula II

Z.sup.3 --Y.sup.6 --A.sup.3 --Y.sup.7 --M--Y.sup.8 --P.sup.1(II),
where
Z.sup.3 is a radical containing reactive groups via which polymerization can be effected,
Y.sup.6 is oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--,
Y.sup.7 and Y.sup.8 are each a single chemical bond, oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, where at least one of the groups Y.sup.7 and Y.sup.8 is --O--CO--O--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--,
A.sup.3 is a spacer having 2 to 30 carbon atoms in which the carbon chain may be interrupted by ether oxygen, thioether, sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups,
P.sup.1 is a radical selected from the group consisting of hydrogen, C.sub.1 -C.sub.30 -alkyl, C.sub.1 -C.sub.30 -acyl, C.sub.3 -C.sub.8 -cycloalkyl unsubstituted or substituted by one to three C.sub.1 -C.sub.6 -alkyl and where the carbon chain of the alkyl, acyl and cycloalkyl radicals may be interrupted by ether oxygen, thioether sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups,
M is a mesogenic group, and
R is a C.sub.1 -C.sub.4 alkyl group.

6 more elements

Dependencies are inferred from the claim text.

Polymerizable liquid-crystalline compounds

Life of this patent

Polymerizable liquid-crystalline compounds

Life of this patent

Abstract

Claims19