Patent GB-517011-A (GB)
Title: Improvements relating to finishing processes for textile materials
IPC: D06M13/322
Filed: 1938-07-14
Abstract: 517,011. Anti-crease treatments; stiffening treatments ; resinous condensation products. TOOTAL BROADHURST LEE CO., Ltd., BATTYE, A. E., CANDLIN, E. J., TANKARD, J., CORTEEN, H., and WOOD, F. C. July 14, 1938, No. 15388/39. Divided out of 506,721. [Classes 2(iii) and 15(ii)] [Also in Group VIII] Textile materials are.treated with a waterrepellency reagent which can be made by the reaction between a tertiary nitrogen base, formaldehyde and a fatty alcohol, amine, .amide or urethane containing an alkyl group of at least ten carbon atoms and also with a water-soluble condensate formed from formaldehyde and a urea-like substance. The condensation between formaldehyde and the urealike substance must have reached such a stage that it 'is in the form of a non-crystallisable .colloidal solution and a 60 per cent. aqueous solution of the product has a viscosity at 20‹C. of at least 10 centipoises. Textile materials treated thus become water-repellent and, in addition, crease-resistant or stiffened according to the amount of formaldehyde-urea condensation product employed. The two reagents are preferably employed .in the same bath but if not, a baking operation should be avoided between the two treatments. The waterrepellency agents may have the formulae where A is an anion of an acid, T is a tertiary amine, B is an aliphatic chain of 10 or more carbon atoms, and C and D are radicles one of which consists of or contains an aliphatic hydrocarbon radicle of 10 or more carbon atoms. C or D may be the radicle of the acid of a fat or fatty oil. The anion of an acid in the general formula may be chloride, bromide, or nitrate, or the anion of an acid salt of a poly basic acid with an organic nitrogen base. Within the general formula there may be used compounds of the type R-O-CH2-NR<1>R<11>R<111> Hal, or of the type R-CO-NR<1>-CH2N(Tert)Hal, or RO-CO-NR<1>-CH2N(Tert)Hal, or of the type RO-CH2-Pyr-X-Pyr where Pyr is pyridine or a C-alkyl pyridine and X is SO 3 or S2O5, or of the type R-Y-CH2-N(Tert)-X where R is an aliphatic chain of at least 10 carbon atoms, Y is oxygen or NH or NR<1>, and X is an anion such as chloride, bromide, methyl sulphate, or acid oxalate. The compounds may be of the type R-CO-NH-CH2-Pyr-A where Pyr is pyridine, C-alkyl pyridine or quinoline and A is an acid radicle. There may be used cetyl oxymethyl- or octadecyl oxymethyl-pyridinium chloride, cetoxy- or stearoxy-methyl pyridinium pyridine sulphite or pyrosulphite, or stearoxy carbamido methyl pyridinium chloride, or N. carbomethoxy heptadecyl aminomethyl pyridinium chloride. The treatment is applicable to pile fabrics. In an example, urea and thiourea are dissolved in formalin and the solution is refluxed in the presence of ammonia for a few minutes, further refluxing being effected after adding boric acid. A paste of " Velan P.F." (Registered Trade Mark) in methylated spirit, and then sodium acetate are added. A cotton fabric is dipped in the diluted solution, theexcess solution is removed, and the fabric is dried and heated. The fabric is rendered crease-resistant and waterrepellent. In another example, cotton fabric is impregnated with a mixture of a condensation product from formaldehyde, hexamethylenetetramine, and urea, with stearoxycarbamidomethyl pyridinium chloride. After drying and heating, the fabric is rendered crease-resistant and water-repellent. Specifications 291,473, [Class 15(ii)], 291,474, [Class 2(iii)], 437,441, 449,243, 466,817, 471,130, 472,389, 475,119, 477,991, and 484,901' are referred to.