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US 4,228,282 AGranted
Lubricating oil additive
AssigneeChevron Research Company
InventorBruce W. Hotten
Life of this patent
Estimating the term…
Abstract
A new class of compositions, tetrahydropyrimidyl-substituted compounds, useful as ashless bases and rust inhibitors, is prepared by reacting a C.sub.3 -to C.sub.5a amine containing a 1,3-diaminopropane group with ethylenediamine tetraacetic acid or nitrilotriacetic acid at a temperature of 150.degree. to 250.degree. C. for 10 to 100 hours.
Claims4
A compound of the formula ##STR3## wherein R, R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen or radicals composed primarily of carbon and hydrogen and containing from 1 to about 50 carbon atoms.
Dependencies are inferred from the claim text.