Patent GB-749683-A (GB)
Title: Improvements in the treatment of textile materials and in compositions therefor
Inventor: OLPIN HENRY CHARLES
IPC: D06P5/13
Filed: 1952-12-10
Abstract: Textile materials are fugitively tinted by applying to them a composition comprising a direct cotton dye and a water-soluble synthetic addition or condensation polymer containing recurrent nitrogen atoms directly attached to -CO- groups.  The polymer may be an addition polymer of a compound containing the group <FORM:0749683/IV(a)/1> except that any compound which is a polymer of a N-vinyl lactam and in which its nitrogen atoms directly attached to CO groups consist entirely of nitrogen atoms derived from N-vinyl lactams, is excluded.  The composition may be used for fugitively tinting fibres of cellulose acetate or other cellulose ester or ether, regenerated cellulose, cotton, wool, silk, polyamides, polyurethanes, polyesters, e.g. the polyester from glycol and terephthalic acid, acrylonitrile polymers, e.g. polyacrylonitrile and copolymers of acrylonitrile with vinyl chloride or vinylidene chloride, copolymers of vinyl chloride and vinyl acetate or vinylidene chloride.  The water-soluble polymer may have a molecular weight of 3000 to 4000, but preferably over 6000. Preferably, a polymer is used which is non-crystallizable.  It may be a polymer from a N-vinyl carboxylic acid amide or a copolymer of such a compound with a vinyl compound of pronounced hydrophilic character, e.g. with acrylamide, acrylic acid, or methacrylic acid.  The carboxylic amide may be an open chain carboxylic amide, e.g. N-vinyl-N-tert.-butyl acetamide, N-vinyl-N-methyl acetamide, or N-vinyl-N-isobutyl acetamide.  The polymer may be one of a vinyl derivative of a heterocyclic compound containing only carbon and nitrogen in the ring, e.g. a polymer of N-vinyl phthalimide, N-vinyl succinimide; N-vinyl-N1-alkyl (or aralkyl or aryl) hydantoins or lactimides, e.g. 1 - vinyl - 4 - methyl - 2.5 - diketo - piperazine; or a copolymer of any of these monomers with acrylamide or methacrylamide.  The monomers for such polymers may be produced by reacting acetylene with the appropriate secondary acid amide.  An addition polymer of an amide, particularly a tertiary amide, of acrylic or methacrylic acid may be used, and if desired, the nitrogen atom of the amide may form part of a ring structure as in the pyrrolidide, piperidide, or morpholide of acrylic or methacrylic acid.  There may be used a water-soluble polyamide or polyester amide containing lactam or lactimide rings in which preferably all the nitrogen atoms are tertiary, e.g. the polymer may be a condensation product from C.C.C - tri - (beta - carboxyethyl) - monomethylamine and diethylene glycol or other polyglycol or from the same acid and di-(betamethylamino)-diethyl ether, or from 2.5-diketopiperazine-1.4-diacetic acid and diethylene glycol. The polymer may be a water-soluble polyurethane obtained by condensing a di-chloroformic ester of a polyglycol with a diamine, e.g. the product from the di-chloroformic ester of a polyethylene glycol containing an average of 2 to 4 ether atoms per molecule with hexamethylene diamine or N : N1-dimethyl-hexamethylene diamine.  The addition polymers may be made by using per compounds e.g. persulphates, as catalysts and the polymerization may be carried out in aqueous solution or emulsion.  If desired the tinting composition may be prepared as a dry powder which may readily be dissolved in water to form a tinting liquid.  The proportion of polymer necessary to prevent fixation of the cotton dyestuff may be 0.5 to 3.0 parts by weight of polymer to each part of commercial dyestuff or 2.5-15 parts of polymer per part of actual dyestuff.  The cotton dye and the polymer may be applied to the textile fibres as an aqueous solution, which may if desired contain a mineral oil or other lubricant or sizing agent.  The solution may be sprayed on the fibres or the fibres may be immersed.  Cellulose acetate fibres may be treated continuously with their production by dry spinning.  Continuous filaments or staple fibres may be treated. In an example, Chlorazol Fast Pink BKS (1 part) and polyacrylamide (1.5 parts) are dissolved in 5000 parts of water.  Cellulose acetate is immersed in the solution and then squeezed and dried. The tint may be removed by a mild soap scour.  Specifications 610,304 and 737,886 are referred to.ALSO:Textile materials are fugitively tinted by applying to them a composition comprising a direct cotton dye and a watersoluble synthetic addition or condensation polymer containing recurrent nitrogen atoms directly attached to -CO-groups.  The polymer may be an addition polymer of a compound containing the group CH2=CH-N<CO-, except that any compound which is a polymer of a N-vinyl lactam and in which its nitrogen groups directly attached to CO groups consist entirely of N atoms derived from N-vinyl lactams, is excluded.  The composition may be used for fugitively tinting fibres of cotton, wool, silk, cellulose derivatives, regenerated cellulose, polyamides, polyesters, polyurethanes, or polyvinyl compounds.  The water-soluble polymer may have a molecular weight of 3,000-6,000 or higher.  It may be a polymer from a N-vinyl carboxylic acid amine or a copolymer of such a compound with a vinyl compound of pronounced hydrophilic character e.g. with acrylamide, acrylic acid, or methacrylic acid. The carboxylic amide may be an open chain amide e.g. N-vinyl-N-tert-butyl acetamide N-vinyl-N-isobutyl acetamide, or N-vinyl-N-methyl acetamide.  The polymer may be one of a vinyl derivative of a heterocyclic compound containing only carbon and nitrogen in the ring, e.g. a polymer of N-vinyl phthalimide, N-vinyl succinimide, N-vinyl-N1-alkyl (or aralkyl or aryl) hydantoins or lactimides e.g. 1-vinyl-4-methyl-2, 5-diketo-piperazine; or a copolymer of any of these monomers with acrylamide or methacrylamide. An addition polymer of an amide e.g. a tertiary amide, of acrylic or methacrylic acid may be used and the N atom of the amide may form part of a ring as in the pyrrolidide, piperidide, or morpholide of acrylic or methacrylic acid.  There may be used a water-soluble polyamide or polyesteramide containing lactam or lactimide rings in which preferably all the N atoms are tertiary e.g. the polymer may be a condensation product from C.C.C.-tri-(beta-carboxy)-monomethylamine and diethylene glycol or other polyglycol, or from the same acid and di-(beta-methylamino)-di-ethyl ether, or from 2, 5-diketo-piperazine-1.  4 diacetic acid and diethylene glycol The polymer may be a water-soluble polymethane obtained by condensing a dichloroformic ester of a polyglycol with a diamine.  If desired, the tinting composition may be prepared as a dry powder which may readily be dissolved in water to form a tinting liquid when required.  The proportion of polymer necessary to prevent fixation of the cotton dyestuff may be 0.5 to 3.0 parts by weight of polymer to each part of commercial dye or 2.5-15 parts of polymer per part of actual dye. The cotton dye and polymer mixture may be applied to the textile materials as an aqueous solution which may if desired contain a mineral oil or other lubricant or sizing agent.  The solution may be sprayed on to the fibres or the fibres may be immersed in the liquid. The tint may subsequently be removed from the fibres by a mild soap scour. Specifications 610,304 [Group IV(a)] and 737,886 are referred to.