Patent GB-445345-A (GB)
Title: Improvements in or relating to the colouration of materials made of or containing synthetic resins
IPC: D06P1/00
Filed: 1934-09-28
Abstract: Textile material impregnated with a synthetic resin is coloured by applying thereto or forming therein an unsulphonated substantially water-insoluble dyestuff and textile material or film made of or containing a synthetic resin, other than a polymerization product of an unsaturated compound, is coloured by applying thereto an aqueous dispersion of an unsulphonated substantially water-insoluble dyestuff or by applying thereto an aqueous dispersion of an unsulphonated dye component, e.g. an azo dye component or an oxidizable amine, and thereafter converting such component on the material into an unsulphonated substantially water-insoluble dyestuff.  Specified synthetic resins are those of the phenol-aldehyde, diphenylolpropane - formaldehyde, diphenylolpropane-furfural and diphenylolcycloparaffinaldehyde types, the condensation products of urea or thiourea with aldehydes, with or without phenols, those of the aromatic sulphonamidealdehyde and polyhydric alcohol-polybasic acid types, condensation products of phenols, cresols, xylenols, &c. with chloracetone, furfural, allyl compounds, sulphur chlorides, acetaldehyde, crotonaldehyde, ketobutanol, chloral, acetone or other aliphatic or cycloaliphatic ketones, those of the hydroxybenzophenone-aldehyde type, polymerization products of vinyl or acrylic compounds and condensation products of vinyl compounds with aldehydes.  The phenol-aldehyde resins may be present in the A. B or C stages.  Specified unsulphonated substantially water-insoluble dyestuffs are those of the azo, unreduced indophenol, polyarylmethane, oxazine, azine, thiazine and thiazole types, unreduced basic derivatives of the anthraquinone series, unreduced vat dyes of the indigoid series, nitrodiarylamines, nitroaminodiaryl compounds, products of the action of ammonia on naphthazarines and N-(nitroaryl)-ar-tetrahydro-a - or b  - naphthylamines.  The dispersing agents may be those described in Specification 219,349, 224,925, 242,393, 242,711, 269,960, 273,819, 273,820, 322,737, 323,788, [all in Class 15 (ii)], or 365,170 and may be used in conjunction with auxiliary solvents, e.g. aliphatic, aromatic, hydroaromatic or terpene hydrocarbons, halogenated hydrocarbons, alcohols, phenols or esters, a large number of such solvents being specified.  Solvents which exert a swelling action on the synthetic resins are advantageously used in some cases.  The following examples are specified: (1) A cotton fabric, mercerized with caustic soda, washed, impregnated with a solution made by boiling together for 5 minutes solutions of formaldehyde and phenol and a little potassium carbonate, squeezed and dried for 1--3 minutes at 170 DEG  C., is dyed by treatment for 1--1\ba1/2\be hours in a bath at 90--100 DEG C. containing 1 : 4-di-(methylamino) anthraquinone dispersed by pasting with xylene, heating to 70 DEG  C., pouring into turkey red oil, heating with stirring and pouring into water.  (2) A viscose fabric, impregnated with an aqueous solution containing urea, formaldehyde and boric acid, squeezed and dried for 20--30 minutes at 130 DEG  C., is dyed by treatment for 1--1\ba1/2\be hours in a bath at 80--90 DEG  C. containing 2 : 4-dinitrodiphenylamine dispersed as in (1).  (3) A cotton fabric, impregnated with a phenol-formaldehyde resin as in (1), is dyed by treatment for 1 hour in a solution at 60--70 DEG  C. of 1-amino-4-hydroxyanthraquinone in carbon tetrachloride.  According to the Provisional Specification the invention may be applied to the dyeing of pre-mordanted material with mordant dyes, material dyed by the process of the invention may be subjected to discharge printing, and the fastness of colourations may be increased and/or discolouration of the synthetic resin may be minimized by treating the materials, before, during or after dyeing, with anti-oxidants, e.g. hydroquinone, or with bases as described in p  Specifications 243,841, [Class 15 (ii)], 340,541, 340,572, 355,726, 361,362, 361,381, 373,628, 378,473, and 406,686.