Metal working lubricant
AssigneeMobil Oil Corporation
InventorHarry J. Andress, Jr.
Life of this patent
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Abstract
A cutting oil composition comprises a major amount of mineral lubricating oil and minor amounts of (A) a sulfurized oil and (B) the reaction product of a polyalkenylsuccinic anhydride with a polyethyleneglycol or a polypropyleneglycol or such reaction product further reacted with sulfur or with phosphorus pentasulfide.
Claims4
A cutting oil composition consisting essentially of a mineral oil and minor amounts, sufficient to provide improved extreme pressure properties thereto, of a component (A) a sulfurized oil and a component (B) the reaction product of a polyalkylenesuccinic anhydride having a molecular weight between about 500 and about 2000 with a polyethyleneglycol or a polypropyleneglycol, having a molecular weight between about 200 and about 1000, in a mole ratio of anhydride to glycol between about 0.5 and about 2, at a temperature between about 150.degree. and about 300.degree. C. for between about 1 hour and about 10 hours to form an intermediate product;
- and further reacting with said intermediate about 0.01-0.05 part by weight sulfur or about 0.05-0.15 part by weight phosphorus pentasulfide per part by weight intermediate, at a temperature between about 150.degree. and about 250.degree. C. for between about 5 hours and about 10 hours.
Dependencies are inferred from the claim text.