Non-sludging, high temperature resistant food compatible lubricant for food processing machinery
AssigneeExxon Research & Engineering Co.
InventorsKevin David Butler, Christopher Jeffrey Still Kent
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Abstract
A lubricating oil suitable for machinery which may come into incidental contact with food is described, which contains a food grade base oil and a combination of food grade additives including a thickener, an antioxidant, a rust inhibitor, an anti-wear additive, an antifoamant, optionally a metal passivator, and 0.2 wt % or less coupling agent. The lubricating oil exhibits good resistance to wear, oxidation and rust, and reduced sludging at equipment surface temperatures of about 200.degree. F. and higher.
Claims3
A method for reducing sludge formation in food grade lubricating oils used in food processing equipment operating at metal surface temperatures of about 200.degree. F. and higher comprising adding to such a food grade lubricant comprising a major amount of a food grade lubricating oil a minor amount of a coupling agent selected from polyglycerol fatty acid esters, wherein said coupling agent is added to the food grade lubricant in an amount of less than 0.2 wt %.
Dependencies are inferred from the claim text.