| 摘要 |
Asymmetric 1:2 chromium complexes which contain a single sulpho group in salt form and which correspond to the formula <IMAGE> wherein the variables X1, X2, Y, A, A2, B and M have the meaning given in Patent Claim 1, are prepared by addition reaction of the 1:1 chromium complex of one azo compound with the other metal-free azo compound, or vice versa. These chromium complexes are used for dyeing and printing natural and synthetic polyamides or polyurethanes, for dyeing leather or metals such as anodized aluminium, and for the bulk spin-dyeing of polyamides or of acetate rayon; chromium complexes soluble in organic solvents are moreover used in printing lacquers (varnishes) and ball point-pen inks. |
