Patent GB-351457-A (GB)
Title: Improvements in or relating to the colouration of materials made of or containing cellulose esters or ethers
IPC: D06P5/15
Filed: 1930-03-20
Abstract: Cellulose esters or ethers, dyeing; printing.-Coloured resist or discharge effects are obtained on materials made of or containing cellulose esters or ethers, including, for example, mixed materials containing cotton, wool, silk, or regenerated cellulose fibres in addition to the cellulose esters or ethers, by the local application, before or after the application of a dischargeable colouring matter, of a preparation containing a stannous compound and an unreduced anthraquinone colouring matter having affinity for cellulose esters or ethers.  Specified stannous compounds are the chloride, chloroacetates, acetate, and thiocyanate (cf. Specification 342,333). The anthraquinone colouring matters may be, for example, mono-, di-, or poly-aminoanthraquinones, substituted or not in the nucleus or in an amino group, e.g. aminomethyl-, acidylamino-, alkylamino-, or oxyalkylamino-anthraquinones, or may be hydroxy- or mercapto-anthraquinones, and monosulphonated derivatives of such colouring matters are especially applicable to mixed materials containing animal fibres in addition to the cellulose esters or ethers.  A table is given showing the shades obtainable on cellulose acetate materials with the following anthraquinone colouring matters, viz. the 1-acetylamino-, 1 - propionylamino-, 1-chloro - 4 - oxy-, 1-amino-2-methyl-, 1-acetylamino-4-oxy-, 1-methylamino-, 1-ethanolamino-, 1-amino-4-oxy-, 1 : 4-diamino-2-methoxy-, 1 : 4-diamino-, 1-methylamino-4-oxy-, 1-methylamino - 4 - amino-, 1 : 4 - di - (monomethylamino)-, 1 : 4-diethanolamino-, 1 : 4-diethanolamino-5 : 8 - dioxy-, 1 : 5 - di - (monomethylamino)-4 : 8-dioxy-, and 1 : 5-diethanolamino-4 : 8-dioxyanthraquinones.  Agents assisting the discharge or assisting the fixation of the anthraquinone colouring matter may be incorporated in the stannous compound preparations, e.g. swelling agents such as hydroquinone, alcohols, organic acids or phenols.  Compounds having an acid reaction may be incorporated in the preparations or the fabrics may be pretreated therewith as described in Specification 334,518, [Class 2 (iii), Dyes &c.]. The following examples are specified.  (1) An orange, yellow and blue pattern on a blueish-red ground is obtained on a fabric of cellulose acetate yarns by dyeing with 2 : 4-dinitrobenzene-azodiethylaniline, printing or stencilling with (a) a mixture containing gum arabic, 1-amino-2-methylanthraquinone, methylated spirit, potassium thio cyanate, citric acid, stannous chloride, and water, (b) a similar mixture containing as dyestuff 1-acetylaminoanthraquinone, and (c) a similar mixture containing as dyestuff 1 : 4-di-(monomethylamino) anthraquinone, drying, ageing or steaming, washing or soaping, and finishing.  (2) A scarlet and green pattern on a violet-blue ground is obtained on a similar fabric by dyeing with dinitro-o-anisidine --> o -oxyethyl-a -naphthylamine, printing or stencilling with (a) a mixture containing gum arabic, 1-ethanolaminoanthraquinone, methylated spirit, citric acid, stannous chloride, and (b) a mixture containing gum arabic, 1 : 5-di-(monomethylamino) - 4 : 8 - dioxyanthraquinone, 1 - propionylaminoanthraquinone, methylated spirit, citric acid, stannous chloride, sodium acetate, and water, and further treatment as in (1). (3) A blue pattern on an orange and red shot ground is obtained on a mixed fabric of cellulose acetate and natural silk by dyeing the cellulose acetate with benzeneazo-1-naphthalene-4-azo-phenol and the silk with Chlorazol fast red K, printing with a mixture containing gum arabic, Alizarin direct blue A, methylated spirit, potassium thiocyanate, citric acid, stannous chloride, and water, and further treatment as in (1).  1 : 4-Diethanolamino-5 : 8-dioxyanthraquinone is obtained from 1 : 4 : 5 : 8-tetraoxyanthraquinone and ethanolamine by the process of Specification 316,989, [Class 2 (iii), Dyes &c.]. 1 : 5-Diethanolamino-4 : 8-dioxyanthraquinone is obtained by the action of ethanolamine on dichloro-or dinitro-anthrarufin.