Patent GB-827469-A (GB)
Title: Improvements in or relating to the production of modified aminoplastic resins
IPC: C08G12/44
Filed: 1956-04-19
Abstract: The aminoplastic resins derived from (i) an aminoplastic-forming nitrogen compound; (ii) paraformaldehyde; (iii) an aliphatic monocarboxylic acid having more than 10 carbon atoms and/or an "abietinic acid"; and (iv) an oxyethylamine (see Group IV (a)), which are water-insoluble but soluble in dilute acids, may be used to render textiles crease-resistant.  Component (i) may include melamine, ammeline, ammelide, urea, thiourea, cyanamide and dicyandiamide.  Component (iii) is preferably a saturated or unsaturated acid from natural oils and fats: "abietinic acid" is defined as acids occurring in natural resins, principally abietic. Component (iv) includes mono-, di- and tri-alkanolamines, e.g. ethanolamines, propanolamines and mixtures.  Hardening agents, including acids, acid salts and acid-forming compounds may be added; as well as solvents and emulsion components, including acetic acid, japan wax, benzene, toluene, paraffins, petrol, chlorobenzene, aliphatic monohydric alcohols of 1-4 carbon atoms (methanol, ethanol) and trichlorethylene.  In Example 12, a grey cotton gaberdine is treated on a foulard with an aqueous acetic acid solution of the reaction product of montan wax acids, stearic acid, dipropanolamine, urea and paraformaldehyde.  In Example 13 the solvent mixture is trichlorethylene and glacial acetic acid. Specification 827,468, [Group IV (a)], is referred to.ALSO:Aminoplasts are prepared by heating in the absence of water until the product is soluble in dilute acids but not soluble in water and without first isolating an intermediate product (i) an aminoplastic forming nitrogen compound, (ii) paraformaldehyde, (iii) an aliphatic monocarboxylic acid having more than 10 C atoms and/or an "abietinic acid," and (iv) an oxyalkylamine. The reaction may be carried out in various orders, the final temperature being normally 90-130 DEG  C.  An anhydrous organic diluent is preferably present, e.g. aliphatic monohydric alcohols of 1-4 C such as methanol or ethanol, or trichlorethylene.  (i) May include melamine, ammeline, ammelide, urea, thiourea, cyanamide, dicyandiamide.  (iii) Are preferably saturated and unsaturated fatty acids from natural oils and fats: "abietinic acid" is defined as acids occurring in natural resins, principally abietic. (iv) Includes mono-, di- and trialkanolamines, ethanolamines, propanolamines and mixtures. The resins may be hardened by acids, acid salts or acid-forming compounds.  Solvents and emulsion components include acetic acid, japan wax, benzene, toluene, paraffins, petrol, chlorobenzene, and the diluents specified above.  In examples: (1) stearic acid, melamine, paraform, triethanolamine and methyl alcohol are reacted; (2) melamine, paraform, triethanolamine and methyl alcohol are first reacted, and oleic acid added later; (3) melamine, paraform, tripropanolamine and ethyl alcohol first, stearic acid later; (4) stearic acid and triethanolamine first, urea and methyl alcohol later, paraform later still; (5) montan wax acids, stearic acid and dipropanolamine first, urea and paraform later; (6) stearic acid and tri-isopropanolamine first, dicyandiamide, paraform and methyl alcohol later; (7) palmitic acid, paraform, monopropanolamine and dipropanolamine first, melamine later; (8) stearic acid, paraform, diethanolamine and methyl alcohol first, melamine and paraform later; (9) lauric acid and triethanolamine first, melamine, paraform and methyl alcohol later; (10) stearic acid and triethanolamine first, thiourea, paraform and trichlorethylene later; (11) stearic acid, melamine and paraform first, triethanolamine and ethanol later.  Uses.-The resin of Example (5) is used in Examples (12) and (13) to render a cotton gabardine water repellent and crease resistant. The resins are also said to be useful for coating paper, wood or leather.  Specification 827,468 is referred to.