Patent GB-665401-A (GB)
Title: Improved colourations on textile materials
IPC: D06P1/642
Filed: 1949-07-01
Abstract: Colourless, water - insoluble, nitrogenous organic gas fading inhibitors are incorporated in coloured textile material having a basis of a cellulose ester or ether by applying them (e.g. by padding) in the form of an aqueous emulsion of a solution thereof in a water-insoluble organic liquid (e.g. toluene, xylene, benzene, di-isopropyl ether, dibutyl ether, dihexyl ether, b  : b 1-dichlorodiethyl ether or glycol dioleate).  The emulsion is advantageously formed with the aid of a mixture of dispersing agents of which one is a water-soluble anionic surface-active agent (e.g. a highly sulphonated fatty acid ester) and another is a water-insoluble but oil-soluble non-ionic surface-active agent (e.g. a condensation product of a long-chain fatty acid with a polyethylene glycol). Dioxane, ethyl alcohol, diacetone alcohol or acetone may be added to increase the solvent power of the mixture for the inhibitor, and the emulsion may be further stabilized by means of a water-miscible long-chain alkyl ether of a polyethylene glycol.  In examples: (1) N : N1-diphenylethylenediamine is dissolved in a mixture of toluene and dioxane containing completely sulphonated glyceryl triricinoleate, a polyethylene glycol monolauryl ether and a polyethylene glycol dioleate, the solution is stirred into water and the resulting emulsion is padded on a cellulose acetate fabric dyed with 1 : 4-di-(methylamino) anthraquinone; (2) the inhibitor in (1) is replaced by N : N1-diphenylacetamidine.  Other inhibitors specified are N - methyl - and N - ethyl - N : N1-diphenylacetamidine, benzylethylaniline, N-phenylmorpholine, diphenylguanidine, N : N1-diphenylbenzamidine, benzimidazole, 2 - methylbenzimidazole and 1 : 3-diphenylimidazoline.  The application of 1 : 3-diphenylimidazoline in the form of an emulsion prepared as in example (1) above and the application of N : N1-dibenzylethylenediamine by the process of the invention are disclaimed.  Specifications 664,204, [Group IV (a)], and 665,402 are referred to.  The Specification as open to inspection under Sect. 91 comprises also the subject-matter indicated above as disclaimed, and contains an example of the application of 1 : 3-diphenylimidazoline by the disclaimed process to a fabric dyed with 1 : 4-diethanolamino-5 : 8-dihydroxyanthraquinone.  This subject-matter does not appear in the Specification as accepted.ALSO:Aqueous emulsions of solutions in water-insoluble organic solvents of colourless, water-insoluble nitrogenous organic compounds capable of inhibiting gas fading of colourations on cellulose ester or ether textile materials are prepared by dissolving the inhibitor in the solvent, (e.g. toluene, xylene, benzene, di-isopropyl ether, dibutyl ether, dihexyl ether, b -b 1-dichlorodiethyl ether or glycol dioleate) containing a mixture of dispersing agents of which at least one is a water-soluble anionic surface active agent (e.g. a highly sulphonated fatty acid ester) and another is a water-insoluble but oil-soluble non-ionic surface active agent (e.g. a condensation product of a long-chain fatty acid with a polyethylene glycol) and dispersing the resulting solution in water.  Dioxane, ethyl alcohol, diacetone alcohol or acetone may be added to increase the solvent power of the mixture for the inhibitor, and the emulsion may be further stabilized by means of a water-miscible long-chain alkyl ether of a polyethylene glycol.  In examples, N:N1-diphenylethylenediamine or N:N1-diphenylacetamidine is dissolved in a mixture of toluene and dioxane containing completely sulphonated glyceryl triricinoleate, a polyethylene glycol monolauryl ether and a polyethylene glycol dioleate, and the solution is stirred into water. Other inhibitors specified are 1:3-diphenylimidazoline p  (except in conjunction with the solvents and dispersing agents specified in the examples above), N-methyl- and N-ethyl-N:N1-diphenylacetamidine, benzylethylaniline, N-phenylmorpholine, diphenylguanidine, N:N1-diphenylbenzamidine, benzimidazole and 2-methylbenzimidazole. Specifications 664,204, [Group IV(a)], and 665,402, [Group IV(c)], are referred to.  The Specification as open to inspection under Sect. 91 comprises also the subject-matter indicated above as excluded, and a reference to N:N1-dibenzylethylenediamine as an inhibitor. This subject-matter does not appear in the Specification as accepted.