Reference

Azobenzene disperse dyes

Azobenzene disperse dyes. Schleusener, Eckart (Sandoz-Patent-G.m.b.H., Fed. Rep. Ger.). Ger. Offen. DE 3234769 A1 21 Apr 1983, 10 pp. (German).In this article, certain chemicals are used. Some of their cas registry numbers are 88314-30-1 and 88314-28-7 (Germany). CODEN: GWXXBX. CLASS: IC: C09B029-085; C09B067-48; D06P001-18. APPLICATION: DE 82-3234769 20 Sep 1982. PRIORITY: DE 81-3139092 1 Oct 1981; DE 81-3146835 26 Nov 1981. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Red dyes (I) are prepd., where R = H, Cl, Br, or iodine; R1 = H, Cl, or Br; R2 = C2-5 alkanoyl, C2-5 carbalkoxy, C1-4-alkoxyethoxycarbonyl, C1-2-alkoxyethoxyethoxycarbonyl, or C1-2 alkylsulfonyl; and R3 = cyanoethyl, cyanopropyl, or CH2CH:CHCl. Thus, diazotization of 2,4-Cl(O2N)C6H3NH2 [121-87-9], coupling with 3-AcNHC6H4N(CH2CH2CN)CH2CH:CHCl [75447-00-6], adjustment of the reaction mixt. to pH 3 (NaOH), and heating at 80-85° for 45 min by passing steam into the mixt. gave I (R = Cl, R1 = H, R2 = Ac, R3 = CH2CH2CN) (II) [86705-36-4] in the b cryst. form. The b form, which is highly stable under conventional dyeing conditions, can also be obtained by recrystn. of crude II from EtOH or Me2CO. It dyes polyester yarn in level, pure red shades and leaves no deposits on the dyeing app. Eleven other I were also prepd. .

Azo disperse dyes

Azo disperse dyes. Becker, Ernst; Bergmann, Udo; Dix, Johannes Peter; Grund, Norbert; Hansen, Guenter (BASF A.-G. , Fed. Rep.Chemicals with cas numbers 90352-73-1 and 90352-74-2 also play role. Ger.). Ger. Offen. DE 3231190 A1 23 Feb 1984, 11 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B029-085; D06P001-18; D06P003-54. APPLICATION: DE 82-3231190 21 Aug 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Dyes of general structure I are prepd., where R is the radical of an aniline diazo component, R1 = alkanoyl or alkylsulfonyl, and R2 is alkyl substituted by an O-contg. radical. I exhibit high fastness to heat and light on polyester fibers. Thus, diazotization of 2,4-Cl(O2N)C6H3NH2 [121-87-9] and coupling with 2,5-Cl(AcNH)C6H3NHCH2CH2CO2CH2CH2OEt [90352-76-4] gave I [R = 2,4-Cl(O2N)C6H3, R1 = Ac, R2 = CH2CH2OEt] [90352-75-3], a yellowish red dye. .