Patent GB-664204-A (GB)
Title: Colouration of textile materials
IPC: D06P1/642
Filed: 1949-06-24
Abstract: The fading of colorations on cellulose ester or ether textile material by combustion products of coal gas is inhibited by incorporating in the solution from which the fibres are spun a compound of the formula <FORM:0664204/IV (a)/1> wherein R represents hydrogen, alkyl (e.g. methyl, ethyl, propyl, butyl, isobutyl or amyl) or aryl (e.g. phenyl or tolyl), R1 and R2 represent aryl (e.g. phenyl, tolyl or ethyl-, chloro-, methoxy-, ethoxy- or acetylamino-phenyl) or aralkyl, and X represents an alkylene radical of at least 2 (but preferably not more than 4) carbon atoms (except compounds in which R represents alkyl or aryl, R1 and R2 each represent aryl-CH2- and X represents an alkylene radical of 2 carbon atoms).  A list of suitable imidazolidine and hexahydropyrimidine derivatives is given.  Specification 648,651, [Group IV (c)], is referred to.  The Specification as open to inspection under Sect. 91 comprises also the use of the compounds indicated above as excluded. This subject-matter does not appear in the Specification as accepted.ALSO:Compounds of the general formula <FORM:0664204/IV (b)/1> (wherein R represents hydrogen, alkyl or aryl, R1 and R2 represent aryl or aralkyl, and X represents an ethylene or propylene radical) are prepared by the action of the appropriate aldehyde on the appropriate di-substituted alkylenediamine, e.g. by refluxing in aqueous alcoholic solution. Reference is made to the preparation of 1 : 3-diphenylimidazoline and its 2-methyl and 2-ethyl derivatives from N : N1-diphenylethylenediamine and formaldehyde, acetaldehyde and propionaldehyde, respectively.  A list of additional products is given.  Specification 648,651 is referred to.ALSO:Cellulose ester or ether textile material (including mixtures thereof with other textile fibres, e.g. cotton, regenerated cellulose, wool, silk or nylon) has incorporated therein, for the purpose of inhibiting fading by combustion products of coal gas of dyes applied thereto, a compound of the formula <FORM:0664204/IV (c)/1> wherein R represents hydrogen, alkyl (e.g. methyl, ethyl, propyl, butyl, isobutyl or amyl) or aryl (e.g. phenyl or tolyl), R1 and R2 represent aryl (e.g. phenyl, tolyl, ethylphenyl, chlorophenyl, methoxyphenyl, ethoxyphenyl or acetylaminophenyl) or aralkyl, and X represents an alkylene radical of at least 2 (but preferably not more than 4) carbon atoms (except compounds in which R represents alkyl or aryl, R1 and R2 each represent aryl-CH2-and X represents an alkylene radical of 2 carbon atoms).  The incorporation of the inhibitors may be effected by adding them to the spinning solution or by applying them (e.g. by padding) to the preformed fibres before, during or after dyeing, e.g. from aqueous dispersion or from solution or dispersion in other liquids, e.g. alcoholic media such as aqueous diacetone alcohol.  In examples: (1) a cellulose acetate fabric is dyed with an aqueous dispersion of 1 : 4-di-(methylamino)-anthraquinone and 1 : 3-diphenylimidazolidine produced with the aid of Turkey Red oil and soap; (2) the inhibitor in (1) is replaced by its 2-methyl derivative and the dispersing agents by sodium lignosulphonate; (3) the inhibitor in (2) is replaced by the corresponding 2-ethyl compound; (4) a cellulose acetate fabric dyed with 1 : 4-di-(methylamino) anthraquinone is padded with an emulsion prepared by dissolving 1 : 3-diphenylimidazolidine in a mixture of toluene, dioxane, completely sulphonated glyceryl triricinoleate, a polyethylene glycol monolauryl ether and a polyethylene glycol dioleate.  A list of additional inhibitors of the imidazolidine and hexahydropyrimidine series is given.  Specification 648,651 is referred to.  The Specification as open to inspection under Sect. 91 comprises also the use of the compounds indicated above as excluded, e.g. 2-methyl-, 2-ethyl-, 2-propyl-, 2-butyl- and 2 - phenyl - 1 : 3 - dibenzylimidazolidine. This subject-matter does not appear in the Specification as accepted.