Patent GB-665447-A (GB)
Title: Improvements in or relating to metal coating
IPC: C23C2/08
Filed: 1948-02-23
Abstract: A mineral oil composition for use in metal coating processes comprises a blend of mineral oil, a hydrogenated fatty oil, an amine and an oleophilic oxygen-containing organic polar compound, the composion having an acid number of between 3 and 15. Hydrogenated fatty oils used are hydrogenated animal, vegetable and marine oils, and hydrogenated residuum and distillate fractions of these oils. The preferred amines are the high-boiling compounds and may be aliphatic, aromatic, cyclic or heterocyclic.  The oleophilic oxygen-containing compound is one of the following groups of compounds: Silicones, oxidized hydrocarbons, condensation reaction products of long chain olefins, such as octadecylene, with maleic anhydride with or without a base and/or an alcohol, reaction products of long chain olefins with maleic anhydride and an organic acid such as oleic acid, reaction products of abietic acid with maleic anhydride and octadecyl alcohol, metal salts of reaction products of alkyl phenols with aliphatic aldehydes, high molecular weight unsaturated ketones, organic acids having a ring structure, organic phosphates, esters of organic acids having a ring structure and partial esters of polyhydric alcohols and poly-oxy-alkylene ethers thereof, ethers, amides and organic salts.  Many examples of all three additions are given.  A typical example of a suitable composition is a mixture of hydrogenated fish oil distillates in mineral oil having an acid number of 15 and containing 0.5 per cent by weight of phenyl-a-naphthylamine and 0.1 per cent of dimethyl silicone.  High molecular fatty acids such as oleic and stearic acids, and non-hydrogenated animal and vegetable oils such as coconut, castor and peanut oils may also be added to the composition.ALSO:Metals are coated by a process which includes cleaning and pickling the metal, passing it through a molten flux bath and then through a molten bath consisting of molten tin, lead, or a mixture of lead and tin, and finally passing the metal through an oil composition, maintained at an elevated temperature, comprising a blend of mineral oil and a hydrogented fatty oil, the blend having an acid number of between 3 and 15 and containing also an amine and an oleophilic oxygen-containing organic polar compound. Hydrogenated fatty oils used are hydrogenated animal, vegetable and marine oils, and hydrogenated residuum and distillate fractions of these oils. The preferred amines are the high-boiling compounds and may be aliphatic, aromatic, cyclic or heterocyclic.  The oleophitic oxygen-containing compound is selected from one of the following groups of compounds: silicones, oxidized hydrocarbons, condensation reaction products of long chain olefins, such as octadecylene, with maleic anhydride with or without a base and/or an alcohol, reaction products of long chain olefins with maleic anhydride and an organic acid such as oleic acid, reaction products of abietic acid with maleic anhydride and octadecyl alcohol, metal salts of reaction products of alkyl phenols with aliphatic aldehydes, high molecular weight unsaturated ketones, organic acids having a ring structure, phosphates, esters of organic acids having a ring structure and partial esters of polyhydric alcohols and poly-oxy-alky-lene ethers thereof, ethers, amides and organic salts.  Many examples of all three additions are given.  A typical example of a suitable composition is a mixture of hydrogenated fish oil distillates in mineral oil having an acid number of 15 and containing 0.5 per cent by weight of phenyl-d-naphthylamine and 0.1 per cent of dimethyl silicone.  High molecular fatty acids such as oleic and stearic acids and non-hydrogenated animal and vegetable oils such as coconut, castor and peanut oils may also be added to the compositions.