Abstract: Disclosed is an azo compound represented by the formula (1) below, a salt thereof, or a copper complex salt compound thereof. (In the formula, R1 and R2 independently represent a hydrogen atom, a sulfonic acid group, a lower alkyl group or a lower alkoxyl group; R3-R6 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxyl group; R7 represents a lower alkyl group or a lower alkoxyl group; and n represents 0 or 1.

Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.

Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.

Abstract: The present invention relates to an azo compound represented by the following formula (1): wherein A denotes a phenyl group having 1 to 3 substituents such as sulfonic acid group, amino group, lower alkyl groups and lower alkoxyl groups, or a naphthyl group, B denotes hydrogen atom, sulfonic acid group, a lower alkyl group, a lower alkoxyl group or the like, each of R1 to R4 independently denotes hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxyl group or the like, D denotes —NHCO—, —N?N— or —NH—, E denotes hydrogen atom, a lower alkyl group or a phenyl group having 1 to 3 substituents such as hydroxyl group and amino group, n denotes 0 or 1, and m denotes 0 or 1, or a salt thereof, or a copper complex compound of either of them, which is used for a polarizing plate having excellent polarization performance and durability and furthermore little color leakage in visible light range.

Abstract: A metal chelated azo dyestuff containing at least one hydrophilic group and having formula (1): wherein M is a metal; A, B and C are each independently a substituted or unsubstituted aromatic ring; D is an aromatic ring optionally substituted by a group other than an azo group; m is 0 or 1; n is an integer from 0 to 3; p is an integer from 0 to 2; q is an integer from 1 to 3; with the proviso that in the event of a plurality of B's, they are the same or different; R1 and R2 are each independently hydrogen or a substituent group; M is tridentate or of higher coordination; and optionally a metal ion coordinated to A and B, B and B in the event of plural B's separated by azo or B and C, in the form of the structure: —O—M—O—.

Abstract: The present invention provides a polarizing film having high heat resistance and a high degree of polarization and excellent optical properties by dyeing a polymer film with a novel azo compound represented by the following formula (1) or (2): ##STR1##

Abstract: The invention provides a 1:2 metal complex in which at least one of the complexants is a polyazo compound of formula ##STR1## wherein --A.sub.1 --(CO).sub.p --OH signifies the radical of a diazo component of formula H.sub.2 N--A--(CO).sub.p --OH, in which the substituent --(CO).sub.p --OH is in ortho-position to the diazotizable amino group --NH.sub.2, --A-- is the ortho-bivalent radical and p signifies 0 or 1, or a modified derivative thereof,--X-- signifies an aromatic bivalent radical,--B.sub.1 signifies the radical of a coupling component HB, or a modified derivative thereof,m signifies 0 or 1,n signifies 0, 1 or 2and M signifies hydrogen or a cation, with the proviso that m+n=1 or 2,or a mixture of such complexes and to the use thereof as dyestuffs, in particular for the dyeing of a substrate dyeable with anionic dyes, especially of leather or pelts.

Abstract: A metal chelate compound of a dis-azo compound represented by the following formula (I) with a metal: ##STR1## (wherein A is a residue forming a heterocyclic ring together with the carbon atom and the nitrogen atom to which it is bonded, X is a residue forming an aromatic group together with the two carbon atoms to which it is bonded, and D is an aromatic residue which may have a substituent, or a heterocyclic amine residue which may have a substituent, and Y is a group having active hydrogen) and an optical recording medium having a recording layer provided on a substrate so that information can be written in and/or read out by a laser, wherein the recording layer contains a metal chelate compound of the dis-azo compound represented by the above formula (I), with a metal.

Abstract: High molecular weight organic material is effectively colored by the incorporation therein of a copper or nickel complex of the ligand compound of formula I ##STR1## wherein A is an isocyclic or heterocyclic aromatic moiety, R is H, halogen, lower alkyl or alkoxy, R.sub.1 is H, lower alkyl, phenyl or substituted phenyl, and B is H, lower alkyl, ureido or substituted ureido, guanidino, anilino, benzamido or a heterocyclic aromatic moiety.

Abstract: 1:1 and 1:2 metal complexes comprising the unit of the formula ##STR1## wherein A and B, independently, are radicals of diazo or coupling components, with the proviso that when one of A and B is a radical of a diazo component, the other is a radical of a coupling component,T is --SO.sub.2 N(R.sub.1)-- or --N(R.sub.1)SO.sub.2 --, wherein R.sub.1 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkyl substituted by phenyl or carboxy or C.sub.2-4 alkyl substituted in the .beta.--, .gamma.-- or .delta.--position by phenoxy, C.sub.1-4 alkyl, chloro or hydroxy, with the proviso that T is --N(R.sub.1)SO.sub.2 -- when A is the radical of a diazo component and T is --SO.sub.2 N(R.sub.

Abstract: The novel compounds of the general formula I ##STR1## where A is a radical of a coupling or diazo component which, if necessary after conversion, is capable of complex formation, Ar is an unsubstituted or substituted aromatic or heterocyclic radical, D is a radical of a diazo component and Me is a Co.sup.2+, Cu.sup.2+, Zn.sup.2+, Mn.sup.2+ or Ni.sup.2+ ion, and the ring B can be further substituted, are very useful for dyeing cellulose fibers, polyesters and blends of cellulose fibers and polyesters.The present dyes are lightfast and fast to washing and to solvents.

Abstract: Cationic disazo compounds of the formula ##STR1## wherein K independently of one another are each a coupling component,R independently of one another are each an unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl group,R.sub.1 independently of one another are each hydrogen, unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, unsubstituted or substituted C.sub.1 -C.sub.4 -alkoxy, or halogen, andAn is an anionare useful as dyes, in particular as paper dyes, whereby dyeings fast to water are obtained. The dyeings obtained have very good fastness to light and to wet processing.Disazo compounds of the formula ##STR2## wherein K and R, are as defined above are useful as disperse dyes and as intermediates in the preparation of the above cationic disazo compounds.