Reference

Fiber-reactive dyes

Fiber-reactive dyes. Seiler, Herbert; Hegar, Gert (Ciba-Geigy A.-G., Switz.). Ger. Offen. DE 2650555 18 May 1977, 67 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B062-04. PRIORITY: CH 75-14348 6 Nov 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Four fiber-reactive dyes (I, R = Me, Cl; R1 = azo, disazo, formazan chromophore) were prepd. and used to dye cellulosic fibers yellow to blue shades. Thus, 3,4-Me(H2N)C6H3SO3H [98-33-9] was neutralized with aq. NaOH, 2,4,6-trifluoro-1,3,5-triazine [675-14-9] added, the product soln. added to R2H Na salt [63353-54-8] soln., and the reaction mixt. salted to give I (R = Me, R1 = R2) [63353-55-9], fast greenish yellow on cotton. The other I were similarly prepd.

A disazo dye derived from J-acid urea

A disazo dye derived from J-acid urea. Armitage, John Leslie; Backhouse, Brain Stuart; Komander, Alfons Anzelm (Imperial Chemical Industries Ltd., Engl.). Brit. GB 1477161 22 Jun 1977, 3 pp. (English). (United Kingdom). CODEN: BRXXAA. CLASS: IC: C09B033-04. APPLICATION: GB 74-624 7 Jan 1974. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 43 Water-sol. azo dye I [65213-62-9], which dyed paper a yellowish-scarlet color, was prepd. by coupling one mol of diazotised 2-naphthylamine-6-sulfonic acid [93-00-5] and one mol diazotised 4-amino-3-methylbenzenesulfonic acid [98-33-9] with one mol 6,6'-ureylenebis(1-naphthol-3-sulfonic acid) [134-47-4] in the presence of triethanolamine [102-71-6].