Method of dyeing leather with metal complex dyes comprised of metalizable azo compounds
AssigneeOrient Chemical Industries, Ltd.
InventorsTakashi Ono, Tatsuya Yagyu, Katsumi Fukuda, Minako Terasaki
Life of this patent
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Abstract
Use of metal complex dyes comprised of metalizable azo compounds to dye metal-tanned leather which makes possible good permeability and excellent color fastness to rubbing and color fastness to light.
Claims8
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye comprising a metalizable polyazo compound represented by Formula:
- ##STR18## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- X is hydroxyl, alkoxy having a carbon number of 1 or 2 or carboxyl;
- and R.sup.1 is hydrogen or amino.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye comprising a metalizable polyazo compound represented by Formula:
- ##STR19## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- Y is hydroxyl, alkoxy having a carbon number of 1 or 2, carboxyl or methyl;
- R.sup.2 is hydrogen or hydroxyl;
- and A is phenyl group or naphthyl group selected from the group consisting of the following (1) through (4):
- ##STR20## wherein R.sup.3 is hydroxyl or carboxyl;
- R.sup.4 is hydroxyl, carboxyl or amino;
- each of R.sup.5 and R.sup.6 independently is hydroxyl or carboxyl;
- each of R.sup.7 and R.sup.8 independently is hydrogen, hydroxyl or amino;
- Sf is the same as defined above;
- and n is 0, 1 or 2.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye comprising a metalizable polyazo compound represented by Formula:
- ##STR21## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- X is hydroxyl, alkoxy having a carbon number of 1 or 2 or carboxyl;
- R.sup.1 is hydrogen or amino;
- and B is phenyl group or naphthyl group selected from the group consisting of the following (1) through (4):
- ##STR22## wherein each of R.sup.3 and R.sup.4 independently is hydroxyl, carboxyl or amino;
- each of R.sup.5 and R.sup.6 independently is hydroxyl or carboxyl;
- each of R.sup.7 and R.sup.8 independently is hydrogen, hydroxyl or amino;
- Sf is the same as defined above;
- and n is 0, 1 or 2.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye comprising a metalizable disazo compound represented by Formula:
- ##STR23## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- X is hydroxyl, alkoxy having a carbon number of 1 or 2 or carboxyl;
- R.sup.9 is hydrogen, methyl, alkoxy having a carbon number of 1 or 2 or Sf, wherein Sf is a sulfo group in the form of the free acid or a salt thereof;
- and D is a coupling component residue having a metalizable hydroxyl at the position adjacent to the carbon atom connected to the azo group and selected from the group consisting of dihydroxyphenyl, methyl-hydroxyphenyl and phenyl-hydroxyphenyl.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye represented by Formula;
- ##STR24## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- R.sup.1 is hydrogen or amino;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye represented by Formula:
- ##STR25## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- Y is hydroxyl, alkoxy having a carbon number of 1 or 2, carboxyl or methyl;
- R.sup.2 is hydrogen or hydroxyl;
- R.sup.4 is hydroxyl, carboxyl or amino;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium;
- a metal complex dye represented by Formula:
- ##STR26## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- Y is hydroxyl, alkoxy having a carbon number of 1 or 2, carboxyl or methyl;
- R.sup.2 is hydrogen or hydroxyl;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium;
- a metal complex dye represented by Formula:
- ##STR27## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- Y is hydroxyl, alkoxy having a carbon number of 1 or 2, carboxyl or methyl;
- R.sup.2 is hydrogen or hydroxyl;
- R.sup.7 is hydrogen, hydroxyl or amino;
- n is 0, 1 or 2;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye represented by Formula:
- ##STR28## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- R.sup.1 is hydrogen or amino;
- R.sup.4 is hydroxyl, carboxyl or amino;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium;
- a metal complex dye represented by Formula:
- ##STR29## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- X is hydroxy, alkoxy having a carbon number of 1 or 2 or carboxyl;
- R.sup.1 is hydrogen or amino;
- R.sup.4 is hydroxyl, carboxyl or amino;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium;
- a metal complex dye represented by Formula:
- ##STR30## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- X is hydroxyl, alkoxy having a carbon number of 1 or 2 or carboxyl;
- R.sup.1 is hydrogen or amino;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium;
- a metal complex dye represented by Formula:
- ##STR31## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- Sf is a sulfo group in the form of the free acid or a salt thereof;
- m is 0, 1 or 2;
- R.sup.1 is hydrogen or amino;
- R.sup.8 is hydrogen, hydroxyl or amino;
- n is 0, 1 or 2;
- Z is --O-- or --COO--;
- and Me is copper, nickel, cobalt, iron or chromium.
A metal-tanned leather dyeing method comprising dyeing metal-tanned leather using a metal complex dye represented by Formula:
- ##STR32## wherein Ps is a phosphono group in the form of the free acid or a salt thereof;
- R.sup.9 is hydrogen, methyl, alkoxy having a carbon number of 1 or 2 or Sf, wherein Sf is a sulfo group in the form of the free acid or a salt thereof;
- Z is --O-- or --COO--;
- Me is copper, nickel, cobalt, iron or chromium;
- and D is hydroxy-1,2phenylene, methyl-1,2-phenylene or phenyl-1,2-phenylene.
Dependencies are inferred from the claim text.