Patent GB-488054-A (GB)
Title: Improvements in the production of mordant dyeings on cotton bottomed with oil
IPC: D06P3/64
Filed: 1937-06-18
Abstract: In the bottoming of cotton with oil, e.g. olive, castor, or peanut oil, in mordant dyeing, the emulsion of the oil is prepared with the use of a neutral emulsifying agent, such as (a) the products of reaction of ethylene oxide or polyglycol ethers with various organic compounds of high molecular weight (cf. Specifications 380,431 and 380,851), (b) esters or ethers, containing at least 8 carbon atoms, of polyhydric alcohols, e.g. sorbitol (cf. Specification 375,842), (c) water-soluble salts of aliphatic sulphonic acids such as those obtained by condensing fatty acids containing at least 8 carbon atoms or their derivatives with amino- or hydroxy-alkylsulphonic acids, (d) water-soluble salts of acid sulphuric esters of alcohols containing at least 8 carbon atoms, (e) water-soluble salts of alkylnaphthalene sulphonic acids, (f) water-soluble salts of sulphonated mineral oils, (g) salts of condensation products of fatty acids containing at least 8 carbon atoms, or their derivatives, with hydroxyalkylamines or aminocarboxylic acids. Thus castor oil may be emulsified in water with the reaction product from ethylene oxide (20 mols.) and oleyl alcohol (1 mol.) or from ethylene oxide (40 mols.) and castor oil (1 mol.). Protective colloids such as glue, polyvinyl alcohols or ethers, polyacrylic acid salts, cellulose ethers or vegetable mucilages may advantageously be added.ALSO:Mordant dyes, dyeing with.-In the production of mordant dyeings on cotton bottomed with oil, e.g. olive, castor or peanut oil, the emulsion of the oil is prepared with the use of a neutral emulsifying agent, such as (a) the products of reaction of ethylene oxide or polyglycol ethers with various organic compounds of high molecular weight (cf. Specifications 380,431 and 380,851), (b) esters or ethers, containing at least 8 carbon atoms, of polyhydric alcohols, e.g. sorbitol (cf. Specification 375,842), (c) water-soluble salts of aliphatic sulphonic acids such as those obtained by condensing fatty acids containing at least 8 carbon atoms or their derivatives with amino- or hydroxyalkylsulphonic acids, (d) water-soluble salts of acid sulphuric esters of alcohols containing at least 8 carbon atoms, (e) water-soluble salts of alkylnaphthalenesulphonic acids, (f) water-soluble salts of sulphonated mineral oils, (g) salts of condensation products of fatty acids containing at least 8 carbon atoms, or their derivatives, with hydroxyalkylamines or aminocarboxylic acids.  Thus, the cotton may be treated at room temperature with castor oil emulsified in water with the reaction product from ethylene oxide (20 mols.) and oleyl alcohol (1 mol.), dried, impregnated with a solution of an aluminium or iron salt and dyed with a mordant dyestuff.  Protective colloids such as glue, polyvinyl alcohols or ethers, polyacrylic acid salts, cellulose ethers or vegetable mucilages may, advantageously, be added to the emulsions.  In an example, cotton yarn is impregnated with castor oil emulsified in water with the condensation product from ethylene oxide (40 mols.) and castor oil (1 mol.), dried at 60 DEG  C., further impregnated with a similar but less concentrated emulsion, again dried, mordanted with basic aluminium sulphate, entered into an aqueous dyebath at room temperature containing Alizarin VI extra, whereupon the temperature is raised in 1/2 hour to 80 DEG  C. and so maintained for 2 hours, treated with an aqueous solution of soda and soap for 4 hours under 1 atmosphere pressure, rinsed and dried.