Carbonate treated dispersants
AssigneeChevron Research Company
InventorRobert H. Wollenberg
Life of this patent
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Abstract
Disclosed are additives which are useful as dispersants in marine crankcase oils and hydraulic oils, lubricating oils. In particular, disclosed are nitrogen-containing lubricating oil dispersants having at least one primary or secondary amino group which have been modified by treatment with a cyclic carbonate.
Claims20
A product prepared by the process which comprises reacting at a temperature sufficient to cause reaction a Mannich base dispersant having at least one primary or secondary amine group with a cyclic carbonate and wherein the molar charge of cyclic carbonate to the basic nitrogens of the Mannich base dispersant is from about 0.2:1 to about 10:1.
A process for the preparation of modified Mannich base dispersant which comprises contacting at a temperature sufficient to cause reaction a Mannich base dispersant having at least one primary or secondary amine group with a cyclic carbonate and wherein the molar charge of cyclic carbonate to the basic nitrogens of the Mannich base dispersant is from about 0.2:1 to about 10:1.
Dependencies are inferred from the claim text.