Patent GB-568037-A (GB)
Title: Method of dyeing vinyl polymers and copolymers
IPC: C09B39/00
Filed: 1942-12-31
Abstract: Vinyl polymer or copolymer materials, e.g. fibres or sheets of polymerized vinyl chloride, of the copolymers of vinyl chloride and vinyl acetate, or of the copolymers of vinyl halides with acrylonitrile or dimethylstyrene, are dyed by subjecting them to the action of a dyebath, e.g. an aqueous dyebath, containing an azo dye of the general formula <FORM:0568037/IV/1> wherein Ar represents a residue of the benzene or naphthalene series, which may be substituted by non-water-solubilizing atoms or groups, e.g. chlorine or bromine atoms, or alkyl, alkoxy, nitro, amino or acylamino groups, B represents a residue of the benzene or naphthalene series, which may be substituted by non-water-solubilizing atoms or groups such as halogen atoms or alkyl, alkoxy or acylamino groups, X represents H, alkyl, aralkyl, alkoxyalkyl or polyalkoxyalkyl, y represents 2, 3 or 4, Z represents zero or a whole number and R represents alkyl. Advantageously, the dyebath contains a substance, e.g. an ester, an amine, a phenol or an open-chain aliphatic ether, capable of swelling the material without dissolving it, is incorporated in the dyebath. Specified diazo components Ar-NH2 are aniline, toluidines, xylidines, anisidines, phenetidines, chloroanilines and naphthylamines, 4-nitroaniline and its 2-chloro, 2 : 6-dichloro, 2-methyl and 2-methoxy derivatives, 2-methyl-5 - nitroaniline, 4 - acetylaminoaniline and 6-chloro- or 6-bromo-2 : 4-dinitroaniline. Specified coupling components are g -(b 1-ethoxy)ethoxypropyl - aniline, d  - (b 1 - ethoxy)ethoxybutyl - aniline, N - b  - (b 1 - methoxy or ethoxy) ethoxyethyl - 3 - methyl - aniline, N - b  - (b 1-methoxy) - ethoxyethyl-3-chloro-aniline, N-ethyl-N-b -(b 1-methoxy)ethoxyethyl - 1 - aminonaphthalene, N-methyl- or ethyl-b -(b 1-methoxy or ethoxy)-ethoxyethyl - aniline, N - methyl - N - b  - (b 1 - butoxy)ethoxyethyl - aniline, N - benzyl - N - b  - (b 1 - methoxy)ethoxyethyl - aniline, N - di - (b 1 - methoxy - b  - ethoxyethyl) - aniline, N - b  - (b 1 - methoxy)ethoxyethyl - N - b - (b 1 - butoxy)ethoxyethyl - aniline, N - b  - methoxyethyl - N - b - (b 1-methoxy or ethoxy) ethoxyethyl-aniline, N-ethyl-N-b -(b 11-methoxy or ethoxy-b 1-ethoxy)-ethoxyethyl - aniline, N - ethyl - N - b  - (b 111 - methoxy or ethoxy - b 11 - ethoxy - b 1 - ethoxy) - ethoxyethy - aniline, N - ethyl - N - b  - methoxy - ethyl - aniline and N - ethyl - N - b  - ethoxyethyl - 2 - methoxy - 5 - acetylamino-aniline.  In examples, fibres of vinyl chloride-vinyl acetate copolymer are dyed: (1) with 2-chloro-4-nitroaniline --> N-ethyl - N - b  - (b 1-methoxy)ethoxyethyl-aniline, by immersion in an aqueous solution containing the dyestuff pasted with dibutyl phthalate, bentonite and sodium lauryl sulphate, the solution being maintained for 15 minutes at 45 DEG  C., then raised during 15 minutes to 65 DEG  C. and so maintained for 1 hour, the fibre being then washed and dried; (2) with 2-methyl-5-nitroaniline --> N - ethyl - N - b  - (b 1-methoxy) - ethoxyethyl - aniline similarly; (3) with 6 - chloro - 2 : 4-dinitroaniline --> N - ethyl - N - b  - (b 1-methoxy)ethoxyethyl-aniline similarly; (4) as in (1) with the dyestuff of (1) pasted with dibutyl phthalate and ammonium caseinate and added with sodium lauryl sulphate to the dyebath; (5) as in (1) with the dyestuff of (1) added in admixture with dibutyl phthalate and ethylene glycol monoethyl ether to the dyebath containing sodium lauryl sulphate; (6) as in (5) with the dyestuff, 4-nitroaniline --> N - ethyl - N - b  - methoxyethyl-aniline; (7) as in (6) with the dyestuff, 2-chloro-4-nitroaniline --> N - ethyl - N - b  - methoxyethyl - aniline; (8) as in (6) with the dyestuff, 3-nitroaniline --> N - ethyl - N - b  - methoxyethyl-aniline, added in admixture with triphenyl phosphate and ethylene glycol monoethyl ether to the dyebath containing sodium lauryl sulphate; (9) as in (5) with the dyestuff, 4-nitroaniline --> N-ethyl - N - b  - (b 111 - methoxy - b 11 - ethoxy - b 1 - ethoxy)ethoxyethyl-aniline; (10) by pretreatment with a solution of dibutyl phthalate in ethyl alcohol, followed by dyeing as in (1) in an aqueous dyebath containing sodium lauryl sulphate and a solution of the dyestuff of (8) in ethylene glycol monoethyl ether.