Patent GB-358574-A (GB)
Title: Improvements in the treatment of textile materials made of or containing organic derivatives of cellulose
IPC: D06M13/152
Filed: 1930-07-10
Abstract: The lustre of yarns, ribbons, fabrics, &c., comprising organic derivatives of cellulose is reduced by treating such materials at raised temperatures with aqueous solutions of phenols of low concentration, e.g. of the order of N/10 or below and preferably between N/40 or N/30 and N/10.  Suitable phenols are ordinary phenol, cresols, xylenols and resorcinol.  The solution may be applied at raised temperatures up to the boiling-point and preferably between 75-90 DEG  C.; and is applied in any suitable way, e.g. by immersion, padding, spraying, brushing, &c.  If desired, the solution may be thickened, and patterned effects may be obtained by local application.  Dyeing may be effected with delustring, e.g. dispersed, insoluble dyestuffs may be applied to the material before, after or during the delustring; thus treatment may be with a 0,7 per cent solution of phenol containing as colouring agent 1-amino-4 - hydroxy - anthraquinone, 1 - methyl - amino - 4 - hydroxy-anthraquinone, 2-nitro-4-chloro-diphenylamine, 1-amino-4-methylamino-anthraquinone, or 1 : 4-dimethyl-amino-anthraquinone.  After treatment, the phenol is removed by rinsing, last traces being removed by a scouring agent, e.g. a dispersion of xylene in Turkey red oil.  Examples, (1) cellulose acetate fabric, previously scoured, is suspended by the selvedge in folded form in a bath containing 3 1/2 grams of phenol per litre and slowly worked for 15-20 minutes at 78-80 DEG  C., lifted, washed and dyed or otherwise treated; a partially delustred effect is obtained: (2) cellulose acetate knitted fabric, previously scoured and dyed, e.g. by dispersed insoluble p  dyestuffs, is treated in rope form on the winch for one hour at 80 DEG  C. with a 50 : 1 bath containing an aqueous solution of phenol of 10 grams per litre, to obtain a fully delustred fabric: (3) cellulose acetate woven fabric after scouring, is simultaneously dyed and partly delustred by treatment on the jigger in a bath set with 1/2 gram per litre soap, 1/2 per cent of 1 : 4-dimethyl-amino-anthraquinone on weight of fabric, and 5 grams per litre phenol; treatment is for 1-1 1/2 hours at 80-90 DEG  C., the goods being well washed off, hydroextracted and dried or otherwise treated.  Any desired treating agent, e.g. soaps, sulphonated oils or other wetting, dispersing or cleansing agents, may be applied before, during or after the treatment with the phenol.  For example, a solution of Turkey red oil in xylene may be applied to improve the "feel" and also to reduce any tendency to slipping or laddering; a soft finish may be obtained by the addition of soap, e.g. 1/2 -3 per cent of soap per litre, in addition to the phenol.  When employing soaps or other mildly alkaline agents in treating cellulose esters the alkalinity of the solution and the time of treatment should be so controlled as to avoid deleterious action; preferably the pH concentrations of the bath should be between 9,5-7,5.  The invention is applicable to filaments, threads, fibres, ribbons, straws, fabrics, films, &c., composed of organic derivatives of cellulose including esters such as cellulose acetate, formate, propionate and butyrate and ethers such as methyl, ethyl, and benzyl cellulose. Specification 266,777, [Class 2 (ii), Cellulose &c.], is referred to.