The present invention provides trisazo dyes of formula (V), wherein A, M and R.sub.1, R.sub.2, R.sub.3, R.sub.4 are as defined in the specification, processes for their preparation, recording liquids and liquid dye preparations containing them and their use in inks as well as processes for applying them and printed articles comprising them.

##STR00001##

The present invention provides trisazo dyes of formula (V), wherein A, M and R.sub.1, R.sub.2, R.sub.3, R.sub.4 are as defined in the specification, processes for their preparation, recording liquids and liquid dye preparations containing them and their use in inks as well as processes for applying them and printed articles comprising them.

##STR00001##

Dichroic azo-azomethine dyes of formula (A) or (B), wherein Ar.sup.1 to Ar.sup.10 are specific (hetero)aromatic moieties and L is a linking group, as defined in the present claims, a dichroic dye mixture comprising said azo-azomethine dyes and a process for preparing the dyes are provided. The dyes are well suited for combination with liquid crystal material for use, inter alia, in a light absorption anisotropic element, for example, in a switchable optical device or an optically anisotropic film.

##STR00001##

Dichroic azo-azomethine dyes of formula (A) or (B), wherein Ar.sup.1 to Ar.sup.10 are specific (hetero)aromatic moieties and L is a linking group, as defined in the present claims, a dichroic dye mixture comprising said azo-azomethine dyes and a process for preparing the dyes are provided. The dyes are well suited for combination with liquid crystal material for use, inter alia, in a light absorption anisotropic element, for example, in a switchable optical device or an optically anisotropic film.

##STR00001##

An object of the invention is to provide a dichroic substance capable of forming a light absorption anisotropic film having excellent light fastness, a composition, a light absorption anisotropic film formed of the composition, a laminate, and an image display device. A composition according to the embodiment of the invention is a composition containing a dichroic substance having an azo group, and the dichroic substance exhibits a highest occupied molecular orbital energy level of 5.60 eV or less and a CLogP value of 7.0 or greater.

An object of the invention is to provide a dichroic substance capable of forming a light absorption anisotropic film having excellent light fastness, a composition, a light absorption anisotropic film formed of the composition, a laminate, and an image display device. A composition according to the embodiment of the invention is a composition containing a dichroic substance having an azo group, and the dichroic substance exhibits a highest occupied molecular orbital energy level of 5.60 eV or less and a CLogP value of 7.0 or greater.

The present invention provides trisazo dyes of formula (V), wherein A, M and R.sub.1, R.sub.2, R.sub.3, R.sub.4 are as defined in the specification, processes for their preparation, recording liquids and liquid dye preparations containing them and their use in inks as well as processes for applying them and printed articles comprising them. ##STR00001##

The present invention provides trisazo dyes of formula (V), wherein A, M and R.sub.1, R.sub.2, R.sub.3, R.sub.4 are as defined in the specification, processes for their preparation, recording liquids and liquid dye preparations containing them and their use in inks as well as processes for applying them and printed articles comprising them. ##STR00001##

Azo-azomethine dyes, a dichroic dye mixture including azo-azomethine dyes, a liquid crystal composition with the azo-azomethine dyes, and methods for producing the dyes and dye compositions. The dyes can be used in liquid crystal systems, transmissive displays, and smart windows. ##STR00001##

Azo-azomethine dyes, a dichroic dye mixture including azo-azomethine dyes, a liquid crystal composition with the azo-azomethine dyes, and methods for producing the dyes and dye compositions. The dyes can be used in liquid crystal systems, transmissive displays, and smart windows. ##STR00001##