Patent GB-509703-A (GB)
Title: Improvements in or relating to the treatment of textile materials
IPC: D06Q1/00
Filed: 1938-01-19
Abstract: 509,703. Etherifying and esterifying textiles; dyeing; craping; delustring. ELLIS, G. H. Jan. 19, 1938, Nos. 1788 and 1789. [Classes 2 (ii) and 15 (ii)] Textile fabrics capable of exhibiting coloured and other effects are obtained by locally treating the fabric with a preparation containing a quaternery ammonium halide in which the nitrogen has attached thereto a long chain alkyloxymethyl group, said preparation not containing thickening agents which react with the quaternary ammonium compound, and thereafter heating the fabric. The locally treated fabric is then caused to exhibit coloured and other effects by subjecting the material to aqueous treatments which have a modifying effect on the material. The treated parts of the fabrics react differently towards aqueous liquids than do the untreated parts. For example, the treated fabric may be subjected to the action of an aqueous dyebath, or the dyed treated fabric may be subjected to the action of a discharging agent. Again, the locally treated fabric may be treated with a mordanting or weighting agent, and the fabric then dyed with a mordant dyestuff. Further, by locally treating a fabric made of crepe-twisted yarns, and thereafter scouring, a differential crepe pattern is obtained. Yet again, differential lustre effects can be obtained by locally treating cellulose acetate fabrics according to the invention, and thereafter subjecting the fabrics to a hot aqueous delustring treatment. The quaternary ammonium compound can be a long chain (of 8 or more carbon atoms) alkoxymethyl pyridinium halide or the corresponding quinolinium or analogous compound, a number of which are specified. They may be applied as viscous liquids or pastes by printing or the like, and the fabric is then heated, e.g., by hot air, steam, or by passing over hot surfaces. In examples, (1) and (2) a cream containing octadecyl-oxymethyl pyridinium chloride, water and china clay is printed or stencilled on to a superficially saponified cellulose acetate fabric, which is then dried, heated and dyed with a direct cotton colour. In other examples, (3) a viscose or superficially saponified cellulose acetate fabric, dyed with a direct cotton colour, is printed with the paste of Example 1, and then with a thickened solution of sodium formaldehyde sulphoxylate, (4) a saponified cellulose acetate fabric, dyed with a direct cotton dye, is printed with the paste of Example 1, dried, heated, and dyed, (5) a cellulose acetate fabric is printed with the paste of Example 1, dried, heated, and dyed, and (6) a fabric containing highly twisted viscose or saponified cellulose acetate yarns is printed as in 1, dried, heated, and scoured to develop the crepe in the untreated portions. According to the Provisional Specifications, in place of the quaternary ammonium compounds, the following reagents may be used, long chain alkyl halides, higher fatty acid anhydrides or halides, and long chain-alkyl esters of chlorocarbonic acid. According to the second Provisional Specification, the application of the treating reagent may be effected from a medium which contains also a white or coloured pigmenting material.