Patent GB-436942-A (GB)
Title: Improvements in dyeing with vat dyestuffs
IPC: D06P1/66
Filed: 1934-03-15
Abstract: Vat dyes, dyeing with; regenerated celluloses, dyeing.--Dyeing in an alkaline hydrosulphite vat is effected with an addition to the vat of a non-aromatic compound, of basic reaction and stable to alkali, containing trivalent or pentavalent nitrogen and at least one open-chain aliphatic radicle with at least 6 carbon atoms directly attached to one another, the use of the products of Specification 380,851 containing at least 6 ethenoxy groups being excluded.  The said compound may be added to the vat in the form of a salt. Alternatively, material dyed in the vat in the usual manner may be treated in an alkaline reducing bath containing the said compound or a salt thereof and, if desired, dyestuff.  In all cases a dispersing agent or protective colloid may also be present.  Specified basic compounds or salts thereof are amines of high molecular weight obtainable as described in Specification 369,614, e.g. laurylamine or dimethyloleylamine; amines containing hydroxyethyl groups or radicles of di- or tri-ethylene glycols, e.g. dodecylmonoethanolamine, cetyl-, octodecyl- or octodecenyl-diethanolamine, the reaction product of ethylene oxide (2 mols.) with dodecylmonoethanolamine (1 mol.); aliphatic polyamines of high molecular weight, e.g. dodecylethylenediamine, or octodecyltriethylenetetramine; condensation products of high molecular weight with amines, e.g. of the fatty acid of coconut p  oil with triethylenetetramine; reaction products of halogenated higher paraffins with ammonia or amines and salts or derivatives of such products, e.g. the condensation product of sodium chlorethanesulphonate with the reaction product of trichlorinated paraffin wax and triethylenetetramine; dodecyltriethylenetetramine hydrobromide, dodecyltrimethylammonium bromide, N-hydroxyethyl dodecylmorpholinium bromide, octyltrimethylammonium hydroxide, lauryltripropylammonium hydroxide, oleyltrimethylammonium hydroxide and the chlorides, bromides, iodides, sulphates and acetates of such bases.  Specified dispersing agents or protective colloids are high molecular sulphonic acids or sulphuric esters, reaction products of alkylene oxides with organic compounds containing reactive hydrogen, condensation products of fatty acid chlorides with albumen degradation products, sulphite cellulose waste liquor and glue.  The following examples are specified: (1) Bleached mercerized cotton satin is dyed in an alkaline hydrosulphite vat containing Indanthrene brilliant violet RR with an addition of dodecyltriethylenetetramine hydrobromide or of a mixture of octodecyldiethanolamine and the sulphonated ethylanilide of oleic acid.  (2) Cotton water yarn or fabric is dyed in an alkaline hydrosulphite vat containing Indanthrene brilliant green GG with an addition of the reaction product from ethylene oxide (2 mols.) and dodecylethanolamine (1 mol.); alternatively, the fabric may be slop-padded with a mixture of the unvatted dyestuff and the said product and then dyed in an alkaline hydrosulphite vat.  (3) Viscose artificial silk fabric is dyed in an alkaline hydrosulphite vat containing Indanthrene brilliant violet RR with an addition of a mixture of dodecyltrimethylammonium bromide or hydroxide and sulphonated castor oil.  (4) Viscose artificial silk yarn is dyed in an alkaline hydrosulphite vat containing Indanthrene brilliant violet RR with an addition of (a) a mixture of dodecyltrimethylammonium bromide and the reaction product from ethylene oxide (20 mols.) and oleyl alcohol (1 mol.), or (b) the reaction product from ethylene chlorhydrin or ethylene oxide (1 mol.) and the coconut oil fatty acid amide of triethylenetriamine, or (c) the condensation product from coconut oil fatty acid and hydroxyethyltriethylenetetramine.  (5) Mercerized cotton fabric or a cotton-artificial silk mixed fabric is dyed in an alkaline hydrosulphite vat containing the dyestuff of example 1 of Specification 311,047, [Class 2 (iii)], with an addition of the salt from dodecyltrimethylammonium bromide and laurylmethyltaurine or of the condensation product of sodium chlorethanesulphonate with the reaction product of trichlorinated paraffin wax and triethylenetetramine.  (6) Wool yarn is dyed by treatment for \ba3/4\be hour in an ammoniacal hydrosulphite vat at 55 DEG  C. containing Helindon brown CR, Helindon red BB and Indigo with an addition of the reaction product from ethylene oxide (2 mols.) and octodecylamine (1 mol.).  (7) A linen fabric is dyed in an alkaline hydrosulphite vat containing Indanthrene brilliant green GG with an addition of a mixture of dodecylpyridinium bromide and sulphonated castor oil.  Specification 362,061 also is referred to. Dodecyltrimethylammonium bromide is obtained by reation of trimethylamine with dodecyl bromide. N-Hydroxyethyldodecylmorpholinium bromide is obtained by the action of dodecyl bromide on N-b -oxyethylmorpholine.  Octyl- or oleyl-trimethylammonium hydroxide is obtained by the action of alkali on the reaction product from trimethylamine and octyl or oleyl iodide.  Lauryltripropylammonium hydroxide is similarly obtained from tripropylamine and lauryl iodide.