Patent GB-543575-A (GB)
Title: Improvements relating to dyeing
IPC: D06P1/667
Filed: 1940-06-07
Abstract: 543,575. Dyeing cellulosic materials ; artificial filaments. SOC. OF CHEMICAL INDUSTRY IN BASLE. June 7, 1940, Nos. 9965 and 9966. Convention dates, June 9, 1939 and May 8, 1940. [Classes 2 (ii), 2(iii) and 15 (ii)] The fastness to light of dyeings on cellulosic materials, such as cotton, regenerated cellulose or paper, with water-soluble dyestuffs containing at least one sulphonic or carboxylic acid group is improved by incorporating in the materials during or after dyeing, in a proportion not exceeding 5 per cent. based on the weight of the materials, a water-soluble organic derivative of an acid of phosphorus which is (a) a watersoluble aliphatic ester of an acid of phosphorus, containing not more than 7 carbon atoms in any single aliphatic ester residue, (b) a watersoluble ester of an acid of phosphorus with a phenol of the benzene series, free from residues of aliphatic polyhydroxyl compounds and from residues derived from polymers produced from gaseous olefines,(c) a water-soluble N-substituted amide or ester-amide of an acid of phosphorus, or (d) a phosphinic or phosphinous acid, or a salt of such a derivative, e.g. an alkali or alkaline earth metal, manganese, chromium, copper or an amine salt. Specified compounds are the monomethyl, monophenyl, diphenyl, mono-o- or p-tolyl, mono-m-xylenyl, mono-4-chloro-3- methyl phenyl, and 4-phenylphenyl esters of phosphoric acid, the monoethyl ester of phosphorous acid, the monoanilide, dianilide and monoamide-monoanilide of phosphoric acid and phenylphosphinic and phenylphosphinous acids. In examples, (1) cotton fabric, dyed with Direct sky blue, green shade, or with Rosanthrene fast bordeaux 2BL, is treated for 1 hour with an aqueous solution at room temperature of the disodium salt of phosphoric acid monophenyl, ester or of the product of saponification of phosphoric acid phenyl ester dichloride with sodium hydroxide, and the treated material is wrung out and dried at 55‹C. ; (2) cotton .fabric, dyed with Chlorantine fast red 7B or Chlorantine red 8BN, is similarly treated with the product of saponification of phosphoric acid o-tolyl. ester dichloride with sodium hydroxide ; (3) cotton fabric, dyed with Direct green B, is similarly treated with the product of similar saponification of phosphoric acid ptolyl ester dichloride; (4) cotton fabric, dyed as in (1), is similarly treated with the product of similar saponification of the phosphoric acid chlorocresyl ester dichloride obtainable by heating 6-chloro-3-hydroxytoluene with phosphorus oxychloride for 3 hours at 130‹-150‹C. ; (5) cotton fabric, dyed with Direct violet N, is similarly treated with the product of similar saponification of the phosphoric acid mxylenyl ester dichloride obtainable by heating 4-hydroxy-1:3-dimethylbenzene with phosphorus oxychloride for 3 hours at 140‹-165‹C. ; (6) cotton fabric, dyed with Direct pink 3BN, is similarly treated with the product of similar saponification of the phosphoric acid 4-diphenyl ester dichloride obtainable by heating 4-hydroxydiphenyl with phosphorus oxychloride for 9 hours under reflux ; (7) cotton fabric, dyed with Rosanthrene orange R, diazotized on the fibre and developed with #-naphthol, or dyed with Chlorantine fast orange G, is similarly treated with the product of similar saponification of phosphoric acid anilide dichloride ; (8) and (9) cotton fabric, dyed with Direct pink 3BN and with Direct green B respectively, is similarly treated with the sodium salt of phenylphosphinic acid ; (10) cotton fabric, dyed with Chlorantine red 8BN, is similarly treated with the product of saponification of resorcinol diphosphoric acid ester tetrachloride with sodium hydroxide ; (11) and (12) cotton fabric, dyed with Carbide black E and with Direct pink 3BN, is similarly treated with the products of similar saponification of phosphoric acid o- and p-chlorocarbonylphenyl ester dichlorides, respectively ; (13) cotton fabric, dyed with Direct sky blue, green shade, is similarly treated with the product of similar saponification of the product of reaction of phosphoric acid p-chlorocarbonylphenyl ester dichloride with aqueous ammonia; (14) cotton fabric, dyed with Direct pink 3BN, is similarly treated with the sodium salt of the ester obtainable by treating with aqueous sodium carbonate the product of reaction of n-hexyl alcohol with phosphorus oxychloride in boiling benzene. The Specification as open to inspection under Sect. 91 comprises also (a) the similar use of tertiary esters of phosphoric acid, (b) the similar use of metal complex salts of organic derivatives of acids of phosphorus, and (c) the use of the phosphorus derivatives for treating the materials before dyeing or for colouring artificial masses or solutions containing cellulose, e.g. viscose solutions from which threads or films are to be produced. This subject-matter does not appear in the Specification as accepted.