摘要:
A process for preparing a liquid formulation of salts of sulfonated azo dyes, comprising a) preparing vesuvin from m-phenylenediamine; b) without interveningly isolating the vesuvin coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I H2N—Ar—SO3H (I), where Ar is phenylene (which may be monosubstituted by sulfo) or naphthalene (which may be mono- or disubstituted by sulfo and/or monosubstituted by hydroxyl) onto vesuvin and c) isolating the dyes in their acid form and subsequently dissolving them in aqueous bases.
摘要:
A water-based ink for ink-jet recording includes dyes and water. The dyes include a blue dye having a hue angle of 220° to 280°; a yellow dye having a hue angle of 70° to 120°; and a copper phthalocyanine dye. A mass ratio (C/B) of a content (C) of the copper phthalocyanine dye to a content (B) of the blue dye in an entire amount of the water-based ink is equal to or more than 0.5, and a total content of the dyes in the entire amount of the water-based ink is equal to or more than 6% by mass.
摘要:
Symmetrical hexakisazo compounds of the formula ##STR1## and mixtures of such compounds, WHEREINEach X is hydrogen or --SO.sub.3 M,each R.sub.1 is --OH or --NH.sub.2,each R.sub.2 is --OH or --NH.sub.2,each Y is hydrogen, methyl, or --SO.sub.3 M, andEach M, independently, is hydrogen or a non-chromophoric cation,Their production, dye compositions containing them, and their use in the dyeing of cellulosic substrates such as cotton and paper.
摘要:
A water-based ink for ink-jet recording includes dyes and water. The dyes include a blue dye having a hue angle of 220° to 280°; a yellow dye having a hue angle of 70° to 120°; and a copper phthalocyanine dye. A mass ratio (C/B) of a content (C) of the copper phthalocyanine dye to a content (B) of the blue dye in an entire amount of the water-based ink is equal to or more than 0.5, and a total content of the dyes in the entire amount of the water-based ink is equal to or more than 6% by mass.
摘要:
Water-soluble polyazo direct dyes for paper and other cellulosics having the formula ##SPC1##Wherein:R is selected from unsubstituted phenyl, unsubstituted naphthyl, phenyl substituted with up to 3 substituents and naphthyl substituted with up to 3 substituents, said substituents selected from the group methyl, ethyl, methoxy, ethoxy, sulfonic acid, benzothiazolyl, and chlorotrimethylammonium acetyl, andX, y and Z are substituted so as to give derivatives of at least one of 1-amino-8-naphthol-4,6-disulfonic acid, 1-amino-8-naphthol-3,6-disulfonic acid, and 1-amino-8-naphthol-4-sulfonic acid.