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U.S. Department of Energy
Office of Scientific and Technical Information

Railway diesel crankcase lubricant

Patent ·
OSTI ID:6353387

A railway diesel crankcase lubricant composition is described comprising a diesel lubricating oil and from about 0.25 to 2.0 weight percent of minor amount of oxidation and corrosion inhibiting agent. The reaction product is of a polyoxyisopropylene diamine, diabasic acid anhydride and polyalkylene polyamine wherein: (i) reacting a dibasic acid anhydride with a polyoxyisopropylenediamine where x is a numeral of about 2 to about 50, forming a maleamic acid; (ii) reacting the maleamic acid with a polyalkylene polyamine, forming a condensate product and; (iii) recovering the condensate product.

Assignee:
Texaco Inc., White Plains, NY
Patent Number(s):
US 4676917
OSTI ID:
6353387
Country of Publication:
United States
Language:
English