Sulphofree basic azo compounds in metal complex form, in metal-free form and method for preparing the same.

摘要

Sulpho-free azo compound in metal-free 1:1 complex or 1:2 complex form having at least an average of 1.3 water solubilising basic groups of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="40" wi="86" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>in which Ra is an aromatic or acetoacyl group including a metallisable group, x is a metallisable group. R<Sub>t</Sub> is an azo component, d is 0 or 1, n is 1 or 2. X is a direct bond or bridging group, and R is the group
<Chemistry id="chema02" num="0002"><Image id="ia02" he="19" wi="53" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>when n is 2 with the provisos as given in the specification.

The compounds are useful as dyes for leather and paper.