Patent GB-533220-A (GB)
Abstract: 533,220. Textile assistants ; proofing textiles. SOC. OF CHEMICAL INDUSTRY IN BASLE. Aug. 2, 1939, Nos. 22397 and 22398. Convention dates, Aug. 12, 1938, July 20, 1939. [Classes 2 (iii) and 15 (ii)] [Also in Groups III and VIII] Formaldehyde is condensed with one molecular proportion each of two different aliphatic carboxylic amides, at least one of which contains more than seven carbon atoms and each contains at least one hydrogen attached to the amide nitrogen. The parent amides may contain water solubilizing groups or a hydroxy group or halogen which may subsequently be converted into such groups. Sulphonic, sulphuric ester, thiosulphuric ester, quaternary ammonium, polyglycerol and polyglycol groups are stated to be water solubilizing groups. Amino and imino groups in salt form also cause the products to be water soluble. The products, which are water soluble are wetting, washing, emulsifying, equalizing, foaming and softening agents. The products which are not water soluble are intermediates for dyestuffs and in some cases may be used as waxes. The products may be used in association with salts, e.g. sodium acetate, solvents, soaps, colloids and loading, softening and wetting agents in the textile, leather and paper industries. The amides may be derived from acids such as acetic, acrylic, capric, myristic, palmitic, oleic, cerotic, chlorpropionic and glycollic acid. Urethanes, urea and substitution products thereof may be used as starting materials. It is advantageous to form the methylol compound of one of the amides as a first step, using if necessary solvents such as acetone, acetic acid, benzene or pyridine and acid or basic catalysts such as trimethylamine, potash, barium hydroxide, sulphuric acid or zinc chloride. As examples of amides which contain water solubilizing groups are mentioned: methylolsulphoacetamide, methylolcarboxylic acid amides containing a quaternary ammonium group, such as products obtained from trimethylamine, pyridine, methylpiperidine or hexamethylenetetramine and N-methylol derivatives of halogencarboxylic acid amides. Halogen atoms which are present in the products may be converted into water solubilizing groups by treating with ammonia, amines or sodium thiosulphate or sulphite or with thioureas. When hydroxy groups are present they may be converted into sulphuric ester groups by sulphonation or etherified with glycidol or ethyleneoxide. In examples: (1) lauric acid and stearic acid methylol amides are condensed with chloracetic acid amide and quaterary ammonium salts formed by treating with pyridine; (2) stearic acid methylolamide is reacted with the addition product of chloracetamide and trimethylamine; (3) stearic acid amide is condensed with sodium methylol acetamide sulphonate and with dimethylolurea ; (4) stearic acid methylolamide is condensed with urea. The Specification as open to inspection under Sect. 91 comprises also the condensation of any carboxylic acid amide with formaldehyde and mentions the use of amides of benzoic, naphthoic, hexahydrobenzoic, resin and naphthenic acids. Diketopiperazine and phthalimide are mentioned as examples of cyclic amides which may be used. The products may be converted into insoluble compounds by means of heat or saponifying agents. When this is effected in the presence of textiles, the properties of the latter are modified. Thus their resistance to creasing, their water repelling properties, their insulating properties to heat and elec. tricity are increased. Diminution of lustre, displacement of fibres, prevention of felting and shrinking and improvement in the fastness of dyeings may also be effected. By applying the agents locally, calender, matt and damask effects may be produced. This subject-matter does not appear in the Specification as accepted.