Patent GB-492157-A (GB)
Title: Printing cellulosic materials
IPC: D06P5/12
Filed: 1937-03-10
Abstract: Printing.-White or coloured resist pattern effects on a coloured ground are produced upon cellulosic textile materials, e.g. of cotton or viscose artificial silk or cotton-wool, viscose-wool or viscose natural silk mixtures, by applying thereto a printing paste containing an isocyanate R-N=C=O wherein R is an aliphatic hydrocarbon radicle containing not less than 12 carbon atoms, heating the printed material, e.g. by steaming, preferably after drying, and dyeing to produce a ground shade.  Specified isocyanates are those in which the radicles R are dodecyl to octodecyl, eikosyl or octodecenyl and those obtained from the mixed amides derived from the mixed acids obtained from coconut oil or stearin, (cf. Specification 485,761). The resist may be coloured by incorporating an ice-colour preparation capable of development by acid and may contain gelatine, glue size or other proteins as additional resist agent.  The ground colours may be produced by vat, azoic or mordant dyes.  In examples: (1) cotton fabric is printed with an aqueous paste containing heptadecyl isocyanate, sodium cetyl sulphate and starch-tragacanth thickening, dried, steamed, padded with an aqueous liquor containing Soledon jade green XS or Soledon orange R, sodium nitrite and tragacanth thickening, dried, passed through dilute sulphuric acid, washed, soaped and dried to obtain a white pattern on a green or orange ground; (2) cotton fabric, printed and steamed as in (1), is padded with an aqueous liquor containing Caledon jade green or Caledon blue 3G, sodium formaldehyde sulphoxylate, potassium carbonate and tragacanth thickening, dried, steamed, oxidized, soaped and dried to obtain a white pattern on a green or blue ground; (3) cotton fabric, printed and steamed as in (1) is padded with an aqueous liquor containing the sodium salt of 1-sulphohydroxydimethylfuchsondicarboxylic acid, chromium acetate and tragacanth thickening, steamed, washed, soaped and dried to obtain a white pattern on a blue ground; (4) cotton fabric, printed and steamed as in (1), is padded with an aqueous liquor containing a mixture of a diazoimino compound of 4-chloro-2-aminotoluene with the 21-toluidide of 2 : 3-hydroxynaphthoic acid or of a diazoimino compound of 4-benzoylamino-2 : 5-diethoxyaniline with the anilide of 2 : p  3-hydroxynaphthoic acid, caustic soda and tragacanth thickening, dried, steamed in presence of acetic and formic acid vapours, washed, soaped and dried to obtain a white pattern on a red or blue ground; (5) cotton fabric, printed and steamed as in (1), is padded with an aqueous liquor containing Caledon jade green X200, caustic soda and sodium hydrosulphite, exposed to the air, washed, chromed, soaped and dried to obtain a white pattern on a green ground; (6) cotton fabric is printed with an aqueous paste containing a mixture of a diazoimino compound of 4-chloro-2-aminotoluene with the 21-phenetidide or the 21-toluidide of 2 : 3-hydroxynaphthoic acid, methylated spirit, caustic soda, heptadecyl isocyanate, sodium cetyl sulphate and starchtragacanth thickening, dried, steamed in presence of acetic and formic acid vapours, padded with an aqueous liquor containing Soledon jade green XS or the sulphuric ester of leuco16 : 17-diethylene ether of dihydroxybenzanthrone, (cf. Specification 193,431, [Class 2 (iii)]), sodium nitrite and tragacanth thickening, dried, passed through dilute sulphuric acid, washed, soaped and dried to obtain a scarlet pattern on a green ground or a red pattern on a blue ground respectively; (7) cotton fabric, printed and steamed as in (6) is padded and further treated as in (4) (second alternative) to obtain a red pattern on a blue ground; (8) cotton fabric, printed and steamed as in (6) is padded and further treated as in (3) to obtain a scarlet or red pattern on a blue ground; (9) cotton fabric, printed and steamed as in (6), is padded with an aqueous liquor containing Fast printing green S, ferrous sulphate and tragacanth thickening, dried, passed through boiling sodium carbonate solution, washed, soaped and dried to obtain a scarlet or red pattern on a green ground; (10) cotton fabric, printed and steamed as in (6), is padded and further treated as in (5) to obtain a scarlet or red pattern on a green ground. Specifications 317,019, [Class 15 (ii)], and 476,639 also are referred to.