Patent GB-786805-A (GB)
Title: Improvements in compositions for coloring textiles
IPC: D06P1/44
Filed: 1955-07-21
Abstract: An aqueous composition for colouring natural or synthetic textile fibres comprises a pigment intimately mixed with a binder comprising (1) a low molecular weight reaction product of formaldehyde with a urea, a triazine or a biguanide and (2) a water-insoluble linear copolymer of monoethylenically unsaturated molecules comprising 0.5 to 7.5 per cent of a monomer containing at least one -COOX group, X being hydrogen, ammonium or an alkali metal, the ratio between the weights of the linear polymer and the reaction product being from 16 : 1 to 1 : 6 (see Group IV (a)). Preferably (1) is N,N1-dimethoxymethylurea, dimethylol - N,N1 - ethyleneurea or dimethoxymethylmonomethylolmelamine and (2) is a copolymer of acrylic acid with n-butyl acrylate, of itaconic acid with ethyl acrylate, of methacrylic acid with n-butyl acrylate, of maleic acid with butyl acrylate or of ethyl acrylate, methyl methacrylate and methacrylic acid.  Any water-insoluble pigment may be used including azo-pigments and lakes, phthalocyanine pigments, vat dyestuffs, carbon black, iron oxide, chrome yellow, titanium dioxide, lithopone and powdered or flaked aluminium, bronze, brass, chromium and gold.  The composition may also contain a thickening agent such as gum tragacanth, a cellulose ether, sodium alginate, polyvinyl alcohol or a partially saponified polyvinyl acetate, and a mild alkali such as sodium acetate, sodium carbonate, chalk, morpholine or ammonia.  There may also be added a small amount of an acidic catalyst for the cross-linking reaction, such as pyridine hydrochloride, ammonium chloride or benzyldimethylamine oxalate.  The composition may be applied to textiles by conventional methods, and cured by drying and heating.ALSO:An aqueous composition for colouring textiles comprises a pigment intimately mixed with a binder comprising (1) a low molecular weight reaction product of formaldehyde with a urea, a triazine or a biguanide and (2) a water-insoluble linear copolymer of monoethylenically unsaturated molecules comprising 0.5 to 7.5 per cent of a monomer containing at least one -COOX group, X being hydrogen, ammonium or an alkali metal, the ratio between the weights of the linear polymer and the reaction product being from 16 : 1 to 1 : 6.  The low molecular weight reaction product may be prepared by reacting formaldehyde with urea, thiourea, biuret, N,N-ethyleneurea, N,N1-ethyleneurea, N,N1-dimethyl urea, N,N1-diethylurea, N,N1-dimethoxymethylurea, N,N-dimethoxymethylurea, N,N1 - diethoxyethylurea, tetramethoxymethylurea, tetraethoxyethyl urea, N,N-dimethylmelamine, or may be an alcohol-modified condensate such as dimethoxymethylmonomethylolmelamine.  The monomer containing the -COOX group may be acrylic, methacrylic, maleic, fumaric or itaconic acid, N - (5 - carboxypentyl) methacrylamide, N - (6-carboxyhexyl) acrylamide, N - (2 - carboxyethyl) acrylamide, n-butyl acid maleate, n-hexyl acid maleate, t-butyl acid maleate, butoxyethyl acid maleate, butoxyethyl acid fumarate, isoamyl acid fumarate, isoamyl acid maleate, ethyl acid maleate, methyl acid fumarate, 2-ethylhexyl acid maleate, or an ammonium or alkali metal salt thereof.  Other monomers from which the copolymers may be prepared comprise methyl, ethyl, propyl, isopropyl, butyl, isobutyl, amyl, phenyl, benzyl and phenylethyl acrylates, methacrylates, ethacrylates, propacrylates, chloroacrylates and bromoacrylates, styrene, a dimethylstyrene, dichlorostyrene, cyanostyrene or methoxystyrene, 4 - chloro - 1 - vinyl - naphthalene, vinyl and vinylidene chlorides and bromides, methyl and ethyl vinyl ketones, methyl isopropenyl ketone, dimethyl, diethyl, dipropyl, dibutyl, diphenyl, dibenzyl, ditolyl and di-(phenylethyl) itaconates, vinyl, allyl and methallyl acetates, propionates and valerates, vinyl thiophene, acrylonitrile, methacrylonitrile, and up to 1 per cent of vinyl pyrrole, vinyl pyridine and N-dimethyl, -diethyl, -dipropyl, -dibutyl, -diamyl, -dihexyl and -dioctyl acrylamides.  Any water-insoluble pigment may be used including azo-pigments and lakes, phthalocyanine pigments, vat dyestuffs, carbon black, iron oxide, chrome yellow, titanium dioxide, lithopone and powdered or flaked aluminium, bronze, brass, chromium and gold.  The composition may also contain a thickening agent such as gum tragacanth, a cellulose ether, sodium alginate, polyvinyl alcohol and a partially saponified polyvinyl acetate, and a mild alkali such as sodium acetate, sodium carbonate, chalk, morpholine and ammonia.  There may be added a small amount of an acidic catalyst for the cross-linking reaction such as pyridine hydrochloride, ammonium chloride and benzyldimethylamine oxalate. The composition may be applied to textiles by conventional methods, and cured by drying and heating.