Water soluble metal working fluids
AssigneeMonsanto Company
InventorsDennis J. Kalota, Skippy H. Ramsey, Larry A. Spickard
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Abstract
There are disclosed novel water-soluble metal working fluids comprising polyaspartic acid and salts thereof useful as a lubricant in process to cut, bend, grind and shape both ferrous and non-ferrous metal. The polyaspartic acid and salts thereof are particularly advantageous in that the fluids can be easily disposed of after use without special treatment because polyaspartic acid and salts thereof are readily biodegradable.
Claims23
A metal working composition comprising an aqueous solution of a polyaspartic polymer selected from the group consisting of the acid, salt and amide thereof wherein the concentration of said polymer is in the range of from about 0.5% to about 70% and a corrosion inhibitor in amount effective to prevent substantial corrosion at a pH of the solution where the polyaspartic polymer does not function as corrosion inhibitor.
A metal working composition comprising an aqueous solution of sodium polyaspartate having a pH in the range of from about 8.5 to about 10, a minor amount of sodium phosphate and a corrosion inhibitor in amount effective to prevent substantial corrosion at a pH of the solution where the polyaspartate does not function as corrosion inhibitor.
Dependencies are inferred from the claim text.