Patent GB-1047323-A (GB)
IPC: C11B9/00
Abstract: 1,047,323. Treating textiles; paper; dyeing processes. TOOTAL BROADHURST LEE CO. Ltd. April 18, 1963. [Jan. 19, 1962; July 4, 1962; Nov. 30, 1962], Nos. 2136/62; 25571/62 and 45305/62. Headings D1B, D1P and D2B. [Also in Division C6] The tendency of polymeric materials containing at least one reactive-OH, > NH or -SH group in each molecule of the material, e.g. wood, paper, wool, cellulosic films and cotton, cellulose acetate and viscose rayon textile materials treated with a sulphonium salt which forms a cation of the formula in which R 1  and R 2  are hydrogen or alkyl groups containing 1-3 carbon atoms and may be the same or different, and R 3  and R 4  are -(CR 1  = CHR 2 ) or alkyl, substituted alkyl where the substituent is not an -SH or >NH group and is substantially stable to alkali or aralkyl, radicals and may be the same or different in the presence of an alkaline catalyst, to pick up iron compounds and anionic dyestuffs and to smell when wet is reduced by further treating them with an alkali and/or a ring-forming compound which is soluble in the treating solution and which is a sulphite, bisulphite, hydrosulphite or a salt of a substance of the formula ABC in which A is -OH, >NH or SH, B is an alkylene group preferably having not more than two carbon atoms and C is the residue of an acid, e.g.-PO 4 H 2 ,-COOH and SO 3 H. Suitable alkalis are caustic soda, caustic potash and sodium carbonate or bicarbonate and suitable ring-forming compounds are sodium, potassium, calcium, lead or barium sulphite, sodium bisulphite, salts of thioglycollic acid, α- or #-mercapto propionic acid, thiomalic acid or #-mercapto ethyl sulphonic acid, formaldehyde-bisulphite addition products and ethylene sulphite. The alkali and/or ring-forming compound may be applied as an aqueous solution at a temperature of from ambient temperature to the boiling point. The polymeric material may be treated by washing or neutralization after treatment with the sulphonium salt to remove the catalyst before treating with the alkali and/or ring-forming compound. An agent which forms a stable water-soluble compound or complex with iron atoms, e.g. the tetrasodium salt of ethylene diamine tetraacetic acid may be present during the treatment with the alkaline catalyst and/or during the subsequent treatment with the alkali and/or ring-forming compound. After treatment with the alkali and/or ring-forming compound the polymeric material may be treated with a detergent and a treatment with an oxidizing agent, e.g. a perborate, a peroxide or sodium hypochlorite, may follow the treatment with the catalyst and/or treatment with the alkali and/or ring-forming compound. Simultaneously with the treatment with the alkali and/or ring-forming compound or prior thereto the polymeric material may be treated with a dyestuff of textile assistant having an -SH, -OH or >NH group, e.g. softening and waterproofing agents such as lauryl mercaptan and stearyl alcohol and long chain amines and dyestuffs having the formula Specified sulphonium salts are the disodium salt of tris-(#-sulphatoethyl sulphonium inner salt and the disodium salt of ethyl bis-(# sulphate ethyl) sulphonium sulphate which may be applied simultaneously with a resin, e.g. cyclic propylene urea/ formaldehyde and glycol urein/formaldehyde resin precondensates.