Patent GB-849532-A (GB)
Title: Process for the dyeing of fibres of polyacrylonitrile
IPC: D06P3/70
Filed: 1957-07-25
Abstract: <FORM:0849532/IV(b)/1> is prepared by reacting N : N.N1:N1-tetramethylethylenediamine with lauryl bromide. <FORM:0849532/IV(b)/2> is prepared by reacting N-tetramethyl-b -hydroxy propylene diamine with lauryl bromide. <FORM:0849532/IV(b)/3> is prepared either by reacting N : N-dimethyl laurylamine with epichlorohydrin in the presence of hydrochloric acid or by quaternating N : N-dimethyllaurylamine with epichlorohydrin to obtain <FORM:0849532/IV(b)/4> which is further condensed with N : N-dimethyl-laurylamine hydrochloride. <FORM:0849532/IV(b)/5> is prepared by reacting N : N-dimethyl laurylamine in the presence of hydrochloric acid with butadiene dioxide. <FORM:0849532/IV(b)/6> is prepared by reacting pentamethyl diethylene triamine with lauryl bromide. <FORM:0849532/IV(b)/7> is prepared by reacting N : N-dimethyl-g -amino propyl-stearoylamide in the presence of hydrochloric acid with butadiene dioxide. <FORM:0849532/IV(b)/8> is prepared by reacting N : N-dimethyl lauryl-amine in the presence of hydrochloric acid with the diepoxy compound of formula: <FORM:0849532/IV(b)/9> is prepared by reacting N : N-dimethyl lauryl-amine with 1 : 4-butane-diol-diglycidyl ether in the presence of hydrochloric acid <FORM:0849532/IV(b)/100> where R is the coconut oil fatty acid radical is prepared by reacting N : N dimethyl-g -aminopropyl coconut oil fatty acid amide with 1 : 4-butane-diol-diglycidyl ether in the presence of hydrochloric acid <FORM:0849532/IV(b)/111> is prepared by reacting N : N-dimethyl-stearyl-amine with 1 : 4-butane-diol-diglycidyl ether in the presence of hydrochloric acid <FORM:0849532/IV(b)/122> is prepared by reacting N : N dimethyl-g -aminopropyl-stearoylamide with 1 : 4-butane-diol-diglycidyl ether in the presence of hydrochloric acid.  Specification 772,003 is referred to.ALSO:Polyacrylonitrile fibres and such fibres as contain acrylonitrile as a substantial component of a copolymer are dyed with basic dyestuffs, which are free from sulphonic acid groups, in the presence of a quaternary ammonium salt containing at least two quaternary nitrogen atoms and at least one but preferably two aliphatic hydrocarbon radicals containing 12-18 carbon atoms (see Group IV(b)).  Suitable diquaternary ammonium salts for use in the process, are those of the general formula:  <FORM:0849532/IV (c)/1> in which R and R1 are aliphatic hydrocarbon radicals containing 12-18 carbon atoms, R2, R3, R5 and R6 are alkyl, cycloalkyl, or aralkyl radicals, which may be substituted, Z is an alkylene radical, which may be substituted or interrupted by hetero atoms, such as oxygen or basic nitrogen atoms or functional groups, Z1 and Z2 are alkylene radicals containing 2 or 3 carbon atoms, n is 1 or 2 and X is an anion.  Preferably R2, R3, R5 and R6 are alkyl radicals with one or two carbon atoms, X is a halogen atom and Z is an alkylene radical containing 2-4 carbon atoms. Specified copolymers of acrylonitrile are those with acrylamide or acrylic esters.  Specified dyestuffs are those of the (1) triarylmethane series containing amine groups and having amino, alkylamino, aralkylamino, or arylamino groups in the para-positions to the central carbon atom, (2) oxazine series in which two carbon atoms of the oxazine ring are also members of a 6-membered aromatic ring and at least one amino group is present in the para-position with reference to the nitrogen atom of the oxazine ring and (3) polymethine series, e.g. <FORM:0849532/IV (c)/2> where X is an anion and R1 is an aromatic or heterocyclic residue containing a basic group.  Examples are given. Specification 772,003 is referred to.