Patent GB-630172-A (GB)
Title: Improvements in producing figured effects on textile fabrics
IPC: D06M13/322
Filed: 1947-06-07
Abstract: Compounds of the type <FORM:0630172/IV (b)/1> where R and R1 represent aliphatic radicals containing at least 10 carbon atoms, N(Tert) represents the nitrogen atom of a tertiary organic base, and Hal represents halogen, are stated to be formed by heating formaldehyde, a nitrile containing a chain of at least 10 carbon atoms, and an acid chloride containing at least 10 carbon atoms, and then heating the reaction product with a tertiary amine until a water-soluble product is obtained (see U.S.A. Specification 2,285,948).ALSO:Figured effects of relatively opaque patterns on relatively transparent backgrounds are produced on cellulosic fabrics by applying to selected areas a non-resinous nitrogen-containing organic compound having at least one long aliphatic chain capable of rendering a cellulosic fabric water-repellent on heating, heating the fabric to develop such water-repellence, and treating the fabric successively with sulphuric acid of parchmentizing strength, then with caustic soda of mercerising strength, and then again with sulphuric acid of parchmentizing strength.  The nitrogen compound is preferably a quaternary nitrogen compound made by reacting (a) a tertiary nitrogen base; (b) an aliphatic alcohol, amine, amide, nitrile, carboxylic acid chloride or carbonate having at least one alkyl group of at least 10 carbon atoms or at least two alkyl groups containing at least 7 carbon atoms, and (c) formaldehyde.  An aliphatic isocyanate or diisocyanate in which the aliphatic chain contains at least 6 carbon atoms may also be employed (see Specification 461,179). Preferred compounds include those of the general formula R-CO-NH-CH2-N(Tert)-Hal, where R is an alkyl radicle having at least 10 carbon atoms, N(Tert) represents the nitrogen atom of a tertiary organic base, and Hal represents a halogen, such as stearamidomethyl pyridinium chloride (see Specification 475,170). Another type of compound comprises sulphur derivatives of the formula R-O-CH2-S-C(=NH)-NH2HCl (see Specification 526,738).  Compounds of the type <FORM:0630172/IV (c)/1> (see Specification 517,474), <FORM:0630172/IV (c)/2> (see Specifications 536,619 and 538,608), and the hydroxyketones described in U.S.A. Specification 2,285,948 (see Group IV (b)) may also be employed.  The nitrogen containing compound may be applied in conjunction with a thickening agent such as cellulose ether, with dyestuffs such as vat dyestuffs or dyestuff derivatives or dyestuff components to produce colour effects, or with dyestuff discharging agents for dyestuffs with which the fabric is dyed.  In an example, bleached cotton fabric is printed by stencil, screen, block, engraved, roller or other means with a printing paste comprising stearamidomethyl pyridinium chloride, methylated spirit and 2-ethyl-hexyl-alcohol, and gum tragacanth thickening.  To this is added Alcian Blue 8GS in acetic acid, and sodium acetate.  After printing, the fabric is dried for 5 minutes at 140 DEG  C., and then passed through a bath of 126 DEG  Tw. sulphuric acid for a few seconds, washed, neutralized and dried.  It is then passed through a normal mercerising process using 56 DEG  Tw. caustic soda, neutralized, rinsed and dried.  It is finally passed through sulphuric acid a second time, washed, neutralized, rinsed and dried. A soft fabric with an opaque greenish-blue pattern on a transparent slightly stiffened white ground is produced. Specifications 100,483, [Class 42 (i)], and 432,389 also are referred to.