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US 5,182,038 AGranted
Mannich base phenol coupled mono and/or bis-succinimide lubricating oil additives
AssigneeTexaco Inc.
InventorsShailaja M. Shirodkar, George P. Speranza
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Abstract
A lubricating oil composition having improved dispersancy and a low nitrogen content. The dispersant additive contained in the oil composition being prepared by first forming mono- and/or bis-alkenyl succinimides, with, respectively, an amidoamine, and a phenol and an aldehyde. Then, the succinimides are combined to provide the desired dispersant additive product.
Claims5
A lubricating oil composition comprising a major portion of a lubricating oil and a minor amount of a dispersant additive prepared by the process comprising:
- (a) reacting an amidoamine wi-th an alkenyl succinic acid anhydride to form a mono-and/or bis-alkenyl amidoamine-based succinimide;
- (b) reacting said -mono-and/or bis-alkenyl amidoamine-based succinimide with a (C.sub.1 -C.sub.18) alkyl phenol and an excess of formaldehyde to form a Mannich (C.sub.1 -C.sub.18) alkyl phenol coupled mono-and/or bis-alkenyl amidoam:ine-based succinimide;
- (c) combining said Mannich (C.sub.1 -C.sub.18) alkyl phenol coupled mono-and/or bis-alkenyl amidoamine-based succinimide with a Mannich phenol coupled mono-and/or bis-alkenyl polyalkyleneamine-based succinim,ide in a weight ratio of about 25:75 to about 75:25 to provide the dispersant additive product;
- and
- (d) recovering said dispersant additive product.
2 more elements
Dependencies are inferred from the claim text.