Patent GB-438523-A (GB)
Title: Improvements in or relating to new vat dyestuff compositions
IPC: D06P1/22
Filed: 1934-05-14
Abstract: Vat dyestuff compositions, e.g. printing pastes, contain as assistant an epihydrinamine of the formula E.NHR, or E2NH, or ENH.R<1>.NHE, where E stands for the group <FORM:0438523/IV/1> , R<1> is alkylene and R is hydrogen, alkyl (including hydroxyalkyl), aralkyl, or an aryl radicle containing one or more solubilizing groups such as SO3H or COOH, or a salt of such an epihydrinamine, which assistants are obtainable by reacting epichlorhydrin with ammonia (or sodamide) or a water-soluble primary amine (including alkylene diamines), if necessary liberating the base from the hydrochloride, and if desired converting the base into a salt by reaction with an inorganic acid, e.g. hydrochloric, sulphuric or phosphoric, or an organic acid, e.g. a sulphonic acid of the benzene, naphthalene or anthracene series. In examples of the manufacture of the assistants: (1) and (4) ammonia gas is passed into an alcoholic solution of epichlorhydrin, and the product treated with alcoholic caustic soda producing diepihydrinamine; (2) as in (1) except that methyl alcohol is employed as solvent; (3) and (5) an alcoholic solution of ammonia is employed in the process of (1) and (4); in (3) the neutralization step is effected with sodium alcoholate; (6) sodamide is added gradually to a heated solution of epichlorhydrin in alcohol; (7) the product of (3) is converted into a salt by means of hydrochloric acid; (8) as in (1) but omitting the treatment with caustic soda, whereby the hydrochloride is obtained directly; (9) aqueous ammonia is added to an aqueous emulsion of epichlorhydrin and the product is worked up without filtration, yielding the product of (8) with some ammonium chloride in solution; (10) the hydrochloric acid in (7) is replaced by phosphoric acid, and (11) by anthraquinone-b -sulphonic acid; (16) methylamine is passed into an alcoholic solution of epichlorhydrin and the product is treated with alcoholic caustic soda to yield epihydrinmethylamine; by omitting the neutralization step or by treating the base with hydrochloric acid, the hydrochloride is obtained; (17) aqueous methylamine is added to an aqueous emulsion of epichlorhydrin, yielding epihydrinmethylamine hydrochloride; (18) monoethanolamine is added to an alcoholic solution of epichlorhydrin and the product is treated with alcoholic caustic soda; the hydrochloride may be produced by working as in (17); (19) aqueous ethylene diamine is added to an alcoholic solution of epichlorhydrin and the product is treated with alcoholic caustic soda, producing diepihydrimethylenediamine; the hydrochloride may be obtained by treating the base with hydrochloric acid or by working as in (17); (20) an aqueous solution of glucamine is added to an aqueous emulsion of epichlorhydrin; (21) an aqueous solution of the sodium salt of anthranilic acid is added to an aqueous emulsion of epichlorhydrin and the product is treated with caustic soda solution.  Other alkalies specified for use in the neutralization step are caustic potash and sodamide, and other suitable solvents are propyl and butyl alcohols.  In examples of the preparation of dyestuff mixtures according to the invention: (12) Anthrene Blue RS is mixed with the product of (1) to (4); the resulting paste may be added to potash-formopon paste and printed on cotton; (13) a halogenated indanthrone is mixed with any of the products of (1) to (11); (14) as in (13) except that the dyestuff is 3 : 3<1>-dibromoindanthrone; (15) printing pastes comprise the mixtures of (12) to (14) together with British gum, corn starch, water, potassium carbonate, powdered hydrosulphite D and glycerine; (22) to (25) as in (12) to (15) except that the assistant is one of the products of (16) to (21).