Patent GB-614214-A (GB)
Title: Manufacture of new condensation products and their application to textile materials
IPC: D06M15/423
Filed: 1946-07-09
Abstract: A process for the manufacture of water-soluble condensation products useful for the production of glazes and/or shrink- and creaseproof effects on textile materials comprises heating under neutral or alkaline conditions an aqueous solution of formaldehyde with one or more polyureas containing at least three groups of the general formula -NRCONH2, wherein R is hydrogen or a short-chain alkyl group, said groups being separated from one another by hydrocarbon chains containing at least two carbon atoms.  The reaction may be carried out in aqueous medium at pH 8-9 at a temperature not higher than 70 DEG  C., and the solution concentrated by evaporation under reduced pressure.  The polyureas may be obtained by converting the amine groups of polyamines to ureido groups by heating with nitro-urea, as described in Specification 614,215, [Group IV (b)].  Suitable polyamines are diethylene triamine, triethylene tetramine, tetra-(aminomethyl) methane, 1 : 2 : 3-triaminopropane and bis-hexamethylene triamine.  The products according to the invention may be applied to textile materials from solution by spraying, spreading, or dipping and usually a catalyst such as ammonium dihydrogen phosphate is added.  The treated material is dried and given a baking treatment preceded, accompanied or followed by calendering. In example (1) formaldehyde is heated at 35-40 DEG  C. and pH 8-9 with N : N-bis-(b -ureidoethyl)-urea and the solution evaporated at normal temperature under vacuum.  The procedure of example (1) is followed in examples (2)-(4), using in place of the N : N-bis-(b -ureidoethyl) - urea, (2) N : N1 - dicarbamyl-N : N1-bis-(b -ureidoethyl)-ethylene diamine; (3) 1 : 2 : 3-triureido propane; (4) tetra-(ureido-methyl) methane.  In examples (5), (6), (8), (9) cotton tape is impregnated with solutions of the products of examples (1), (2), (3), (4) respectively, each containing ammonium dihydrogen phosphate, then dried at 65-70 DEG  C. and imparted to cotton fabric by impregnation with a solution of the product of example (1) containing ammonium dihydrogen phosphate followed by drying in air, friction calendering at 120 DEG  C. and baking at 150 DEG  C.ALSO:A process for the manufacture of water-soluble condensation products useful for the production of glazes and/or shrink- and crease-proof effects on textile materials comprises heating under neutral or alkaline conditions an aqueous solution of formaldehyde with one or more polyureas containing at least three groups of the general formula NRCONH2, wherein R is hydrogen or a short chain alkyl group, said groups being separated from one another by hydrocarbon chains containing at least two carbon atoms.  The reaction may be carried out in aqueous medium at pH 8-9 at a temperature not higher than 70 DEG  C., and the solution concentrated by evaporation under reduced pressure.  The polyureas may be obtained by converting the amine groups of polyamines to ureido groups by heating with nitro-urea as described in Specification 614,215, [Group IV (b)].  Suitable polyamines are diethylene triamine, triethylene tetramine, tetra-(aminomethyl) methane, 1 : 2 : 3-triaminopropane and bis-hexamethylene triamine.  The products according to the invention may be applied to textile materials from solution by spraying, spreading or dipping and usually a catalyst such as ammonium dihydrogen phosphate is added.  The treated material is dried and given a baking treatment preceded, accompanied or followed by calendering.  In example (1) formaldehyde is heated at 35-40 DEG  C. and pH 8-9 with N : N-bis-(b -ureidoethyl)-urea and the solution evaporated at normal temperature under vacuum.  The procedure of example (1) is followed in examples (2)-(4), using in place of the N : N-bis-(b -ureidoethyl)-urea; (2) N : N1-dicarbamyl-N : N1-bis-(b -ureidoethyl)-ethylene diamine; (3) 1 : 2 : 3-triureido propane; (4) tetra-(ureidomethyl) methane.  In examples (5), (6), (8), (9), cotton tape is impregnated with solutions of the products of examples (1), (2), (3), (4) respectively, each containing ammonium dihydrogen phosphate, then dried at 65-70 DEG  C. and baked at 135 DEG  C. and tested by laundering. In example (7), a gloss is imparted to cotton fabric by impregnation with a solution of the product of example (1) containing ammonium dihydrogen phosphate followed by drying in air, friction calendering at 120 DEG  C. and baking at 150 DEG  C.