GB948694A - Simultaneously dyeing and resin finishing textiles - Google Patents

Abstract

Reaction products of polymers containing reactive groups with dyes also containing reactive groups are applied to textile materials and cross-linked with or without a cross-linking agent, by way of the remaining reactive groups of the polymer. The dyestuffs may contain a large number of specified reactive groups including acid amide, ureido, carboxylic acid, and suplhonic acid and their ester groups, aldehyde, epoxy, N-methylol and N-methylol ether groups. The polymers may be homo- or copolymers made up of monomers bearing suitable reactive groups as well as inert monomers or the reactive groups may be introduced after polymerization. The specified reactive groups are: amino, hydroxyl, aldehyde, carboxylic acid and ester groups, lactone, carbonamide carbonimide, carbamido, melamine, dicyandiamide, carbamate, epoxy, N-methylol, N-methylol ether, chlorhydrin, isocyanate, active methylene, acid chloride and anyhdride groups, reactive halogen atom, C=C bonds capable of addition and not taking part in the polymerization thiourea the thioisocyanate groups. The polymers may be prepared by solution, emulsion, bulk or precipitation polymerization. In the examples the following copolymers are reacted with monoazo dyes containing N-methylol groups and are prepared from: (3) butyl acrylate and N-methylolacrylamide in aqueous emulsion (7) acrylamide, butyl acrylate, vinyl propionate, acrylonitrile and vinyl acetate in toluene-butanol (1:1) solution, (8) acrylamide N-methylolmethacrylamide and ethyl acrylate by precipitation from butanol, (9) to (13) as in (3), (14) isobutyl acrylate, acrylonitrile, vinyl chloride and N-methylolmethacrylamide in aqueous dispersion (15) butyl acrylate, acrylonitrile and N-methylolmethacrylamide from aqueous dispersion, (16) butyl acrylate, styrene and N-methylolmethacrylamide from aqueous dispersion, (17) butyl acrylate, vinyl chloride, methyl acrylate and acrylamide from aqueous disperson and (18) as in (15). The following cross-linking agents are employed: the tetrabutyl ether of tetramethylolglyoxaldiureine, butanediol-1, 4-bis-(N-methylolurethane) and a urea-formaldehyde precondensate partly etherified with methanol. Specifications 744,877, 799,781, 842,802, 850,977, 900,764 and 946,471 are referred to.ALSO:Dyeing and/or printing textiles and simultaneously resin finishing them in a process wherein a polymer containing reactive groups is reacted by way of part of said reactive groups with a dye also containing reactive groups, the macromolecular coloured compound thus obtained is applied to the textiles and cross-linked by way of the remaining reactive groups, or the polymer containing reactive groups, the reactive dye and, if necessary, a cross linking agent are applied to the textiles and the reactions are effected in a simple operation on the fibre. The textiles may be of cotton, spun rayon, cellulose acetate and triacetate, synthetic polyamides, acrylonitrile polymers and copolymers and especially polypropylene. The polymers may be homopolymers or copolymers and may be prepared from a large number of specified monomers by aqueous or organic solution polymerization, aqueous emulsion, bulk or precipitation polymerization. Alternatively polymers may be employed in which the reactive groups are introduced after polymerization. The dyestuffs may contain any of a large number of specified reactive groups including N-methylol acid amide, acid imide, ureido, carboxylic acid sulphonic acid ester aldehyde, N-methylol and N-methylol ether groups. The polymers, dyestuff and, if required cross-linking agents may be applied all together, separately or in any desired combination. A dyeing step at 60-110 DEG C. is advantageous before the final curing at temperatures up to 200 DEG C. The polymer solutions or dispersions may further contain other textile finishing resins, including urea-and melamine-formaldehyde condensates as well as many natural, synthetic and semi-synthetic known substances. The composition may be applied by padding or printing. The polymers of the present process may also be used for bonding non-woven fabrics, as a resin over a naphthol bottoming or under amiline black and, when a suitable discharging agent (e.g. sodium hydroxymethane sulphonate) is included for discharging direct dyes. Examples of dyeing and finishing are given. Specifications 744,877, 799,781, 842,802, 850,977, 900,764 and 946,471 are referred to.