Patent GB-464921-A (GB)
Title: Improvements in or relating to the treatment of direct dyestuffs
Filed: 1935-10-28
Abstract: Lakes; substantive dyes, dyeing with; regenerated cellulose, dyeing; printing.--The fastness of direct dyestuffs, especially to water, acid boiling, perspiration, acid cross-dyeing, acid milling, wet ironing and washing, is improved by treating them in substance or on a fibre or other substratum with (a) water-soluble condensation products obtainable from glycerol dihalogenhydrins or epihalogenhydrins and two or more molecular proportions of bases of the general formula <FORM:0464921/IV/1> wherein R1 and R2 represent hydrogen, alkyl, oxyalkyl, cycloalkyl, aralkyl, aryl or oxyaryl, or (b) the acylated, alkylated, arylated or aralkylated derivatives of such condensation products.  The invention is applicable inter alia in printing and in colouring paper pulp.  In examples: (1) cotton yarn, dyed with Chlorantine light blue 3GLL, is immersed for \ba1/2\be hour in an aqueous bath at 20 DEG  C. containing a condensation product obtained by heating glycerol a  : g  - dichlorhydrin with aqueous ammonia under pressure at 110--117 DEG  C. and thereafter dried; (2) cotton, dyed with Chlorantine light green BLL, is immersed for \ba1/2\be hour in an aqueous bath at 30 DEG  C. containing a condensation product obtained by heating glycerol-a  : g -dichlorhydrin with an alcoholic solution of ammonia under pressure at 105 DEG  C.; (3) cotton yarn, dyed with Chlorantine light red 5B, is immersed for \ba1/2\be hour in an aqueous bath at 20--25 DEG  C. containing a condensation product obtained by heating glycerol-a  : g -dichlorhydrin with aqueous ammonia under pressure at 115--135 DEG C.; (4) cotton yarn, dyed with Chloramine pure blue A, is immersed for \ba1/2\be hour in an aqueous bath at 20--30 DEG  C. containing a product obtained by methylating the condensation product in (2) with methyl chloride at 110--115 DEG  C. in presence of alcoholic caustic soda; the yarn so treated may be used as warp without tinting of the hot sizing bath; (5) cotton, dyed with Direct green B, is immersed for \ba1/2\be--\ba3/4\be hour in a bath at room temperature containing a condensation product from glycerol-a  : g -dichlorhydrin (1 mol.) and sulphanilic acid or 1 : 4-naphthylamine sulphonic acid (2 mols.); (6) cotton, dyed with Chloramine pure blue A, is immersed for \ba1/2\be--\ba3/4\be hour in a similar bath containing a condensation product from glycerol-a  : g -dichlorhydrin (1 mol.) and methylamine or dimethylamine (2 mols.); (7) white cotton yarn is immersed for 1 hour in an aqueous bath at 30 DEG  C. containing the dioxypropyl derivative obtainable by treating the condensation product in (3) with glycerol monochlorhydrin under pressure and in presence of caustic soda, washed and dyed with Chloramine pure blue A; the dyeing is fast to water and to acid cross-dyeing; (8) a viscose-cotton fabric is treated as in (7) and dyed with Chloramine pure blue FF to obtain a fast uniform dyeing on both fibres; (9) cotton yarn, dyed with Chloramine pure blue A, is treated for \ba1/2\be--\ba3/4\be hour at room temperature with an aqueous solution containing a condensation product from epichlorhydrin and ammonia; the fastness to cross-dyeing with acid dyestuffs is improved; (10) cotton, dyed with Chloramine pure blue A, is treated for \ba1/2\be--\ba3/4\be hour at room temperature with an aqueous solution containing the condensation product from glycerol-a  : g -dichlorhydrin (1 mol.) and ammonia (2 mols.), in presence of caustic soda (1 mol.) and is further treated with the chlorides (1 mol.) of coconut fatty acids to impart a soft feel; (11) cotton, dyed with Chloramine pure blue A, is treated for \ba1/2\be--\ba3/4\be hour at room temperature with an aqueous solution of a quaternary ammonium compound obtainable by (a) treating with ethyl chloride under pressure, and in presence of caustic soda, the condensation product used in (3), or (b) the corresponding methylated product, or (c) the corresponding methylated product, acylated, e.g. with p-toluenesulphonic acid chloride; (12) cotton or regenerated cellulose material is printed with an aqueous paste containing Chloramine red B, Tetracarnit (Registered Trade Mark), glycerol, British gum, disodium phosphate and the condensation product used in (1) and the printed material is steamed; the print is fast to washing; (13) cotton, printed with Chloramine pure blue A and steamed is treated for \ba1/2\be--\ba3/4\be hour at room temperature in an aqueous solution of the condensation product used in (1) and is washed to remove the thickening; (14) a solution of the condensation product used in (1) is added to an aqueous solution at 60--70 DEG  C. of Visco black and the precipitate is filtered, washed and dried for use as a pigment; if the precipitation is effected in presence of a suitable substratum a lake is obtained; (15) a condensation product as used in (1) is added to a cold aqueous solution of Chloramine pure blue FF to obtain a fine dyestuff suspension which is applicable for dyeing paper, the dyeing being fast to water; the corresponding condensation products from glycerol-a  : g -dichlorhydrin (1 mol.) and monoethanolamine, hexahydroaniline or benzylamine (2 or more mols.) may be used similarly; (16) leather, dyed with Dermacarbon B by the brush process is treated for \ba1/2\be--\ba3/4\be hour with an aqueous solution of the condensation product used in (1) and dried. Specifications 277,371, [Class 2 (iii)], and 372,325 are referred to. p   The Specification as open to inspection under Sect. 91 comprises also the use of glycerol halogenhydrins in general and of condensation products in which R1 and R2 in the above formula form a heterocyclic residue and includes additional examples as follows: (1) cotton yarn, dyed with Chlorantine light red 7BL is immersed for \ba3/4\be hour in a bath at 40 DEG  C. containing a -aminopropanediol; (2) a cotton-cellulose acetate mixed fabric, in which the cotton is dyed with Solar red 2BL, is treated with a product prepared by condensing glycerol-dichlorhydrin with ammonia and further condensing with glycerol-monochlorhydrin; (3) cotton dyed with Chloramine pure blue A is treated with a condensation product from glycerol-dichlorhydrin and hexamethylenetetramine or pyridine. This subject-matter does not appear in the Specification as accepted.