Dyeing method null of production method of metal complex dye and its dye and metal complex dye and metal leather for metal leather dyeing

摘要

NEW MATERIAL:Metallic complex dye of azo dye to be metallized shown by formula I (Ps is phosphone in the form of free acid or sa Sf is sulfone in the form of free acid or salt) m is 0-2; R1 is H or amino; X is OH, 1-2C alkoxy or carboxyl). EXAMPLE:A compound shown by formula II. USE:Dyeing leather. PREPARATION:Diazonium salt of o-, m- or o-aminobenzenephosphonic acid is reacted with a naphthol to form a substance shown by formula III or a sulfonic acid derivative thereof to give a monoazo compound shown by formula IV. Then this compound is coupled with tetrazonium salt of benzidine derivative shown by formula V to dive a tetrakis azo dyestuff shown by formula I. Then this dyestuff is reacted with a metal imparting agent in an acidic or basic atmosphere in water and/or an organic solvent.