High temperature nonflammable hydraulic fluid
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsLois J. Gschwender, Carl E. Snyder, Jr.
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Abstract
A high temperature, nonflammable working fluid consisting essentially of about 0.1 to 5.0 w/o of a rust-/corrosion-inhibitor and about 0.01 to 1.0 w/o of a lubricity additive, balance a chlorotrifluoroethylene oligomer base oil, wherein the lubricity additive is a sulfonamide having the formula C.sub.8 F.sub.17 SO.sub.2 N(C.sub.2 H.sub.5)CH.sub.2 CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.n H, wherein n has a value of 0 to 15, and wherein the rust inhibitor comprises a blend of zinc dinonylnaphthalene sulfonate and a zinc salt of a high molecular weight succinate ester in a weight ratio of about 99:1 to 20:80.
Claims2
A high temperature, nonflammable working fluid consisting essentially of about 0.1 to 5.0 w/o of a zinc-based rust inhibitor and about 0.01 to 1.0 w/o of a sulfonamide, balance a chlorotrifluoroethylene oligomer base oil;
- wherein said sulfonamide has the formula C.sub.8 F.sub.17 SO.sub.2 N(C.sub.2 H.sub.5)CH.sub.2 CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.n H, wherein n has a value of 0 to 15;
- and wherein said rust inhibitor comprises a blend of zinc dinonylnaphthalene sulfonate and a zinc salt of a high molecular weight succinate ester in a weight ratio of about 99:1 to 20:80.
Dependencies are inferred from the claim text.