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US 4,368,338 AGranted
Degreaser solvent stabilization
AssigneeThe Dow Chemical Company
InventorsNobuyuki Ishibe, Jimmie K. Harden nee Ashley
Life of this patent
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Abstract
A stabilized chlorinated solvent composition useful in removing grease from metals wherein the solvent is perchloroethylene or trichloroethylene, and the stabilizer is N-methyl pyrrole in combination with ethyl acetate, acetonitrile or pyrazine.
Claims6
A stabilized chlorinated solvent composition consisting essentially of perchloroethylene or trichloroethylene and a stabilizer combination of from about 0.01 to about 0.5% N-methyl pyrrole together with from about 0.1 to about 1% of ethyl acetate, acetonitrile or pyrazine, based on the total weight of solvent and stabilizer combination.
Dependencies are inferred from the claim text.