| 摘要 |
A colored synthetic polyurethane leather is prepared by reacting a polyisocyanate with a polyol or a polyurethane substrate and a 2 : 1 complex metal dye which contains an isocyanate-reactive group selected from the group consisting of amino, alkylamino, and hydroxyl and which has the formula WHEREIN A and A' are the same or different and each represent phenylene which can have non-dissociated substituents; B and B' are the same or different and each represent coupling components which can contain nondissociated substituents within each component and are disposed in the dye molecule so that the bridging groups D and D' are in an ortho position relative to the bridging azo groups; Z and Z' are the same or different and each represent -O-, or -COO- which are disposed in an ortho position relative to the azo bridging groups; D and D' are the same or different and each represent -O-, M represents chromium or cobalt; [N]<+>represents aliphatic ammonium or acyclic ammonium, [Q]<+>represents hydrogen, sodium, ammonium, aliphatic ammonium or acyclic ammonium, N'<+>represents aliphatic ammonium or acyclic ammonium, and n represents an integer from 1-6.
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