Patent GB-459791-A (GB)
Title: Improvements in the manufacture and production of washing, wetting, cleansing, dispersing and like agents
Filed: 1935-07-11
Abstract: Wetting, cleansing, dispersing, &c. agents are prepared by condensing metanilic acid or its substitution products with halogen containing aliphatic or cycloaliphatic carboxylic acids containing at least six carbon atoms or their halides, anhydrides, esters or other derivatives.  Branched chain fatty acids obtained by oxidation of paraffin wax may be used in the process and also fatty acids obtained from naturally occuring substances such as coconut oil, olive oil, palm kernel oil, soyabean oil, castor oil, hydrogenated train oil, tallow, montan wax, bile acids, naphthenic acids and colophony. Derivatives of fatty acids mentioned are those containing hetero atoms such as sulphur and oxygen or carboxylic acid amide groups. More than one molecular proportion of halogen may be introduced into the fatty acids or the latter may be only partly halogenated. Halogen carriers may be used. The metanilic acid may be substituted in the nucleus by hydroxyl, carboxylic, ether, ester, nitro groups or halogen atoms, and one of the hydrogens attached to the nitrogen may be substituted by aliphatic, cycloaliphatic, aromatic, aliphatic-aromatic or heterocyclic residues.  The metanilic acids may be used in the form of salts which are soluble in organic solvents, such as salts formed with triethylamine, dimethylaniline, or pyridine.  The products which may be used for dispersing solvents, oils, fats and waxes may be employed in association with water glass, Glauber's salt, perborates, ortho, meta and pyro phosphates, soaps, sodium tetrahydronaphthalenesulphonate, fatty alcohol sulphuric ester salts, aliphatic sulphonates, glue, starch, tragacanth, clay, china clay, bentonite and products obtained by reacting ethyleneoxide with hydroxy, carboxylic, amino and mercapto compounds.  In an example, metanilic acid or N-ethylmetanilic acid is condensed with a chlorinated stearic acid, in the presence of sodium carbonate. According to the Provisional Specification, the halogenated fatty acids or derivatives are condensed with any aminosulphonic acid having a sulphonic group attached to an aromatic radicle. Sulphanilic acid, orthoamino benzenesulphonic acid, toluidine sulphonic acids, naphthylaminosulphonic acids, dimethylphenylenedi aminesulphonic acids and naphthylaminedi- and tri-sulphonic acids are mentioned.  In further examples, naphthionic acid and an amino sulphonic acid having the formula CH3NH.C2H4.O.C6H4SO3H are employed.  Specification 389,543 is referred to.ALSO:Dispersing-agents are prepared by condensing metanilic acid or its substitution products with halogen containing aliphatic or cycloaliphatic carboxylic acids containing at least six carbon atoms or their halides, anhydrides, esters or other derivatives. The dispersion of solvents, oils, fats and waxes is mentioned.  In an example, metanilic acid or N-ethylmetanilic acid is condensed with a chlorinated stearic acid.  The products may be used in the presence of perborates, water glass, ortho, meta and pyrophosphates, soaps, sodium tetrahydronaphthalenesulphonate, salts of fatty alcohol sulphuric esters and aliphatic sulphonic acids, glue, starch, tragacanth, china clay, beutonite and products obtained by reacting ethylene-oxide with hydroxy, carboxylic and mercapto compounds.  According to the Provisional Specification, the halogenated fatty acids are condensed with any aminosulphonic acid having a sulphonic group attached to an aromatic radicle. Sulphanilic acid, orthoaminobenzene-sulphonic acid, toluidine sulphonic acid, naphthylaminosulphonic acid, dimethylphenylene-diaminesulphonic acid and naphthylamine di- and tri-sulphonic acids are mentioned.  In further examples, naphthionic acid and an aminosulphonic acid having the formula CH3NH.C2H4O.C6H4SO3H are employed.