Patent GB-191312790-A (GB)
Title: Process for Dyeing or Printing with Naphthazarin Derivatives.
Inventor: IMRAY OLIVER
IPC: C09B57/00
Filed: 1913-06-02
Granted: 1914-01-15
Abstract: 12,790. Imray, O., [Soc. of Chemical Industry in Basle]. June 2. Vat dyeing; printing.-Vegetable fibres are dyed or printed by the methods usually employed for vat dyes by means of the dyes of the naphthazarin series specified below; grey, brown, brownish-black, greenish-black, bluish-black to deep black shades are obtained; the fastness of these may be improved by aftertreatment with metallic salts. The naphthazarin derivatives used are: -the derivatives obtained by condensing naphthazarin or its nitro, amino, or halogen substitution products with primary, secondary, or tertiary amines; the transformation products obtained by heating naphthazarin, its nitro, amino, or halogen substitution products, or arylamino derivatives, in a solvent or diluent, with or without addition of alkali, alkali sulphide, alkaline earth sulphide, or other salt; the condensation products obtained from naphthazarin, or its nitro, amino, or halogen substitution products, or leuco compounds, or the naphthazarin intermediate products, or the products referred to above, and compounds containing the grouping -CH2.CO- or -CH=C(OH)-, such as indoxyl, oxythionaphthenes, phenols, naphthols, anthranol, or anthrol; the products from naphthazarin and one or two molecules of oxythionaphthene or one molecule of alpha-naphthol, alpha-anthrol, anthranol, 1:2-dioxyanthranol, or indoxyl, are specified; condensation products obtained from primary, secondary, or tertiary amines such as aniline, p-phenylenediamine, pyridine, quinoline, mono- or di-ethylamine, and any of the compounds specified above, for example the products obtained by boiling naphthazarin in water, or aqueous ammonia, caustic soda, sodium carbonate or sulphide. Examples are given of dyeing in a hydrosulphite vat with the following bodies:-the condensation product obtained from naphthazarin and aniline, described in Specification 21,297/97, [Class 2, Acids and salts, Organic, &c.]; the products obtained . by boiling alcohol containing naphthazarin and aromatic amines, such as aniline, p- or ophenylenediamine, benzidine, homologues of aniline, ethylaniline, dimethylaniline, alpha- or #-naphthylamine, diphenylamine, mono- and dip-aminodiphenylamine, alpha- or #-aminoanthraquinone, sulphanilic acid, 1:6- or 2:6-naphthylamine sulphonic acid, anthranilic acid, or p-aminosalicylic acid; the products obtained by prolonged boiling of naphthazarin in water, or in water, alcohol, &c., in presence of alkali, alkali sulphide, alkaline-earth sulphide, sodium acetate or phosphate, &c. ; the condensation products from naphthazarin and oxythionaphthene, indoxyl, alpha-naphthol, anthranol, or anthrol; the products obtained bv boiling naphthazarin in water or sodium sulphide solution, and subsequently condensing with aniline or p-phenylenediamine. The dyeings may be aftertreated with potassium chromate or copper sulphate. Examples are also given in which a printing-paste containing the dye obtained by boiling naphthazarin in alcoholic solution wilh p-phenylenediamine, caustic soda, hydrosulphite, glycerine, and alkaline thickening, is printed on fabric prepared with glucose or otherwise, or a paste containing this dye, alkaline thickening, and glycerine, is printed on material prepared with glucose; the prints are steamed and then treated with potassium chromate or copper sulphate solution.