Reference

Metal complex dyes free from sulfonamide and amino groups

Metal complex dyes free from sulfonamide and amino groups. (BASF A.-G., Fed. Rep. Ger.). Jpn. Kokai Tokkyo Koho JP 59159855 A2 10 Sep 1984 Showa, 13 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09B045-16. APPLICATION: JP 83-33903 3 Mar 1983. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes having free-acid form I (A = benzene or naphthalene diazo component residue contg. a OH or carboxy group in o-position to the azo group; B, K = coupler residue; D = arom. diazo component residue; K and D contain a metal complexing group in o-position to the azo group) contg. 4-5 sulfo groups were prepd. and used for dyeing wool and leather. Thus, 2-amino-1-hydroxy-4-nitrobenzene-6-sulfonic acid [96-67-3] was diazotized, coupled with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid [90-20-0], diazotized, coupled with 2-naphthol [135-19-3], complexed with 1:1 Cr complex of 1,2,4-H2N(HO)C10H5SO3H ? 2-C10H7OH, and treated with NaOH to pH 7-7.5 to give II [94140-68-8], black on wool and leather.

Bisazo compounds and their use for dyeing fibers

Bisazo compounds and their use for dyeing fibers. Shirasaki, Toshitaka; Sotogoshi, Teruhito (Nippon Kayaku Co., Ltd. , Japan). Ger. Offen. DE 3403326 A1 9 Aug 1984, 24 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B033-048; C09B045-28; D06P001-39; D06P001-10. APPLICATION: DE 84-3403326 31 Jan 1984. PRIORITY: JP 83-13674 1 Feb 1983. 93031-65-3 which is the cas registry number is also used here. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 40 Azo compds. (I; R = OH, OMe; R1, R2 = H, Cl, Me, sulfo; 3 or 4 sulfo groups per mol.) or their Cu complexes were prepd. and used as fast blue or navy blue dyes for cellulose fibers and esp. for their blends with polyester fibers in single-bath, single-step dyeing under acidic conditions at high temp. Thus, [4,6,2-HO(HO3S)C10H5]2NH [87-03-6] was coupled with diazotized 2,6,4-H2N(O2N)(HO3S)C6H2OH [96-93-5] at <10° and pH 6.5-7.0 and then with diazotized 2,4,6-H2N(O2N)(HO3S)C6H2OH [96-67-3] at <10° and pH 8-9 to give I (R = OH; A, 3-NO2, R1 = 5-SO3H; B, 5-NO2, R2 = 3-SO3H) (II) [93031-66-4], a light- and washfast blue dye for cotton knit fabric. Copperization of II (CuSO4, NH4OH) gave the corresponding 2:1 Cu complex [93081-38-0], which produced a fast deep reddish blue dyeing on a polyester-cotton knit when applied with Kayalon Polyester Blue 2R-2F from an aq. bath at 130° and pH 5. Twelve other I and their Cu complexes were also prepd. .