The
wire drawing lubricant composition of the present invention, then, consists essentially of acid compounds, 1. e., free acids or soapsthereof,characterized by containing the radicals of saturated aliphatic carboxylic, hydroxy carboxylic, keto carboxylic, or hydroxy keto-carboxylic, acids derived from a petroleum hydrocarbon mixture by liquid-phase, controlled, partial oxidation of such petroleum hydrocarbon mixture in accordance with the oxidation procedures disclosed in my U. S. Patent No. 1,863,004. These soaps, or the free acids, may be employed in solution, or in the form of aqueous emulsions, or in dry form.
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| wire drawing lubricant |
If, on the other hand, the fatty acid be of relatively low molecular weight, or if it contains in its constitution more than the normal content of oxygen, or oxygen plus halogen, or halogen, the attraction of that fatty acid compound for metal surfaces is greatly enhanced. Against the use of fatty acid compounds containing halogen, however, stands the possible disadvantage that decomposition of the compound with release of halogen acid may in some instances cause some corrosion of the wire carrying the compound in case the metal of the wire is susceptible to ready corrosion by small amounts of halogen acid.
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