US 5,833,880 AGranted

Polymerizable liquid-crystalline compounds

AssigneeBASF SE

InventorsKarl Siemensmeyer, Karl-Heinz Etzbach, Paul Delavier, Frank Meyer

Life of this patent

Estimating the term…

Loading patent…

Abstract

Mixtures of liquid-crystalline compounds comprising at least two different substances of the formula I ##STR1## where Z.sup.1 and Z.sup.2, independently of one another, are polymerizable groups, Y.sup.1 and Y.sup.2, independently of one another, are each a direct bond, --O--, --COO--, --OCO-- or --S--, A.sup.1 and A.sup.2, independently of one another, are spacers, and R.sup.1, R.sup.2 and R.sup.3 are conventional substituents, and novel compounds of the above formula where at least two of Z.sup.1, Z.sup.2, Y.sup.1, Y.sup.2, A.sup.1 and A.sup.2 are not identical, are described. The novel mixtures and compounds are suitable, inter alia, as base material for color-effect materials and piezomaterials, preferably in chirally doped form.

Claims16

Dependent claims

A liquid-crystalline mixture comprising at least two different liquid-crystalline compounds of formula I:

##STR190## where Z.sup.1 and Z.sup.2, independently of one another, are polymerizable groups,
Y.sup.1 and Y.sup.2, independently of one another, are each a direct bond, --O--, --COO--, --OCO--, or --S--,
A.sup.1 and A.sup.2, independently of one another, are spacers, and
R.sup.1, R.sup.2 and R.sup.3, independently of one another are hydrogen, C.sub.1 - to C.sub.20 -alkyl, C.sub.1 - to C.sub.20 -alkoxy, C.sub.1 - to C.sub.20 -alkoxycarbonyl, C.sub.1 - to C.sub.20 -monalkylaminocarbonyl, formyl, C.sub.1 - to C.sub.20 -alkylcarbonyl, fluorine, chlorine, bromine, cyano, C.sub.1 - to C.sub.20 -alkylcarbonyloxy, C.sub.1 - to C.sub.20 -alkylcarbonylamino, hydroxyl or nitro;
wherein in at least one of said liquid crystalline compounds A.sup.1 and A.sup.2 are different from one another.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/682,587Filed 23 Aug 1996
Priority: DE 44 08 171.511 Mar 1994
Granted: 10 Nov 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

C09K 19/46
Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40: containing esters
C07C 69/92
Of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic…
C08F 246/00
Copolymers in which the nature of only the monomers in minority is
C09K 19/2007
Linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers: the chain containing -COO- or -OCO- groups