Reference

Reactive disazo yellows

Reactive disazo yellows. Miskiewicz, Maria; Granosik, Jerzy; Kopec, Krzysztof; Drabik-Drabicki, Andrzej; Gmaj, Jan (Zaklady Przemyslu Barwnikow "Organika-Boruta", Pol.). Pol. PL 117433 B1 31 Aug 1981, 4 pp. (Polish). (Poland). CODEN: POXXA7. CLASS: IC: C09B062-00. APPLICATION: PL 78-210647 31 Oct 1978. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes I (R = 1-phenyl-5-pyrazolone deriv. residue; M = NH4, Na, K, or NH4-Na mixt.) are prepd. by condensing 2 mol monoazo dichlorotriazine deriv. of 1-phenyl-5-pyrazolone with 1 mol di-Na 4,4'-diamino-2,2'-stilbenedisulfonate (II) [7336-20-1] in the presence of an ammonium base at pH 5-6.5 or in an acid medium, adjusting the pH to 7.5-8.5 with concd. ammonia water, and drying the obtained dye, without isolation, in a spray dryer. In an alternative procedure the condensation is conducted in a neutral or acidic medium which is neutralized with NaOH, KOH, Na2CO3, K2CO3, or Na3PO4, and then treated with concd. ammonia water. Thus, 23.5 parts 4-acetamido-2-aminobenzenesulfonic acid [88-64-2] was diazotized and coupled in a neutral medium with 32.3 parts 1-(2,5-dichloro-4-sulfophenyl)-3-methyl-5-pyrazolone [84-57-1]. The product was deacetylated by heating in aq. H2SO4, the obtained monoazo dye [58201-52-8] was condensed with 18.4 parts cyanuric chloride [108-77-0] at pH 6.8-7.0 (Na2CO3), the resulting dichlorotriazine dye [25489-31-0] was condensed with II (prepd. from 15.4 parts of the acid), the pH of the reaction mixt.In this article, certain chemicals are used. One of their cas registry numbers is 7336-20-1 was adjusted to 7.5-8 with 20% ammonia water and, after addn. of a mixt. of spindle oil and nonionic emulsifier, the mixt. was spray dried to give a dye [93376-17-1] dyeing cellulose fibers a greenish yellow shade. .

Acid azo dyes

Acid azo dyes. Przybylski, Chrystian; Gmaj, Jan (Osrodek Badawczo-Rozwojowy Przemyslu Barwnikow "Organika", Pol.). Pol. PL 124170 B2 30 Apr 1984, 8 pp. (Polish). (Poland). CODEN: POXXA7. CLASS: IC: C09B031-00. APPLICATION: PL 81-229179 12 Jan 1981. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes I (R = arom. amine residue; R1 = acyl, MeOCO, EtOCO, PhOCO; R2 = coupling agent residue having active CH2 group or benzene deriv. contg. 31 amino group or 31 OH group optionally etherified or esterified; M = H, alkali metal, alk. earth metal, NH4) are prepd. by coupling diazotized RNH2 with II, diazotizing the obtained monoazo compd., and coupling it with R2H. Thus, 9.3 parts aniline [62-53-3] was diazotized and coupled with 24.2 parts 4-acetamido-2-aminobenzenesulfonic acid [88-64-2]. The obtained monoazo compd. was diazotized and coupled with 9.4 parts phenol [108-95-2] giving a dye [94099-35-1] dyeing polyamide and protein fibers and leather in yellow shades.