Bisdiazonium salts of 4,4'-diamino-3,3'-dialkoxybiphenyls and a

Details Bisdiazonium salts of 4,4'-diamino-3,3'-dialkoxybiphenyls and a Bisdiazonium salts of 4,4'-diamino-3,3'-dialkoxybiphenyls and a

1986-03-27

1991-01-22

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Diazo or diazonium

534558, 534562, 534565, C07c24520, D06P 368

Patent

active

049872214

ABSTRACT:
Bisdiazonium salts of the formula (1) ##STR1## in which R denotes a linear or branched alkyl or alkoxyalkyl radical having 3-5 carbon atoms and X.sup.- represents the radical of a strong acid or of a zinc chloride double salt, and a process for their preparation by diazotizing a 4,4'-diamino-3,3'-dialkoxybiphenyl of the formula (2) ##STR2## in which R has the meaning mentioned, in an aqueous, strong, non-oxidizing inorganic or organic acid at temperatures from about -10.degree. C. to about +40.degree. C. by means of an alkali metal nitrite, and precipitating the resulting bisdiazonium salts by adding an alkali metal chloride, bisulfate, monosulfonate of 1,5-naphthalenedisulfonic acid or tetrafluoroborate or zinc chloride.
These salts are useful in dyeing and printing textile fiber materials by the methods of the ice color technique, using suitable coupling components; they are also useful for preparing photographic tracings by the methods of reprography.

REFERENCES:
patent: 1760780 (1930-05-01), Schmidt et al.
patent: 1962111 (1934-06-01), Bamberger
patent: 2707181 (1955-04-01), Stanley et al.
patent: 2710859 (1955-06-01), Kehrer et al.
Venkataraman, The Chemistry of Synthetic Dyes, vol. I, Academic Press, N.Y., 1952, pp. 668-672.
Kirk-Othmer, Encyclopedia of Chemical Technology, 2nd Ed., vol. 17, 1968, pp. 358-364.

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