Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1973-05-18
1976-06-08
Higel, Floyd D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260144, 260155, 260156, 260165, 260192, 260196, 260205, 260206, 260207, 2602071, 2602075, 260208, C09B 4300, D06P 118, D06P 326, D06P 354
Patent
active
039622096
ABSTRACT:
Azo dyestuffs having the formula ##EQU1## in which A is an aromatic carbocyclic radical containing the CN substituent in the o-position to the azo group and K is the radical of a coupling component as well as the process for their production are disclosed. The process involves cyano exchange between a metal cyanide, e.g. CuCN and the corresponding dyestuff containing Cl or Br instead of CN, in an organic solvent particularly polar aprotic organic solvents, e.g. dimethyl sulfoxide. The dyestuffs are suitable for dyeing a variety of fiber materials such as cotton, wool, silk as well as snythetic materials such as polyamide and polyethylene terphthalate to give dyeings which are characterized by great clearness and good general fastness properties.
REFERENCES:
patent: 1725596 (1929-08-01), Pongratz
patent: 2128684 (1939-08-01), Vollmann et al.
patent: 2195076 (1940-03-01), Braun et al.
patent: 3259646 (1966-07-01), Harris et al.
Bacon et al., J. Chem. Soc. (London), vol. of 1964, pp. 1097 to 1107.
Gotteschlich Alois
Leverenz Klaus
Bayer Aktiengesellschaft
Higel Floyd D.
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