Precoupled mono-succinimide lubricating oil dispersants and viton seal additives
First Claim
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1. A lubricating oil composition comprising a major portion of a lubricating oil and a minor dispersant amount of a reaction product prepared by a process which comprises:
- (a) reacting a polyethyleneamine with a phenolic compound in the presence of excess formaldehyde to form a Mannich phenol coupled polyethyleneamine;
(b) reacting said Mannich phenol coupled polyethyleneamine with an alkenyl succinic acid anhydride to form a Mannich phenol coupled mono-alkenyl succinimide;
(c) acylating said coupled mono-alkenyl succinide with glycolic acid to form a glycolated Mannich phenol coupled mono-alkenyl succinimide; and
(d) recovering said glycolated Mannich phenol coupled mono-alkenyl succinimide.
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Abstract
A lubricating oil composition having improved dispersancy and viton seal compatibility. The dispersant being prepared by coupling two polyethyleneamines with an aldehyde and a phenol, followed by conversion to a succinimide. The resulting coupled succinimide is then acylated with glycolic acid to form a glycolated Mannich phenol coupled mono-alkenyl succinimide.
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Citations
14 Claims
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1. A lubricating oil composition comprising a major portion of a lubricating oil and a minor dispersant amount of a reaction product prepared by a process which comprises:
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(a) reacting a polyethyleneamine with a phenolic compound in the presence of excess formaldehyde to form a Mannich phenol coupled polyethyleneamine; (b) reacting said Mannich phenol coupled polyethyleneamine with an alkenyl succinic acid anhydride to form a Mannich phenol coupled mono-alkenyl succinimide; (c) acylating said coupled mono-alkenyl succinide with glycolic acid to form a glycolated Mannich phenol coupled mono-alkenyl succinimide; and (d) recovering said glycolated Mannich phenol coupled mono-alkenyl succinimide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A lubricating oil composition comprising a major portion of a lubricating oil and minor dispersant amount of a reaction product prepared by a process which comprises:
(a) reacting a polyethyleneamine with a phenolic compound in the presence of excess formaldehyde to form a Mannich phenol coupled polyethyleneamine ##STR7## wherein x is an integer of from 1 to 6;
(b) reacting said Mannich phenol coupled polyethyleneamine with enough alkenyl succinic acid anhydride (ASAA) to ensure complete imidization and give the Mannich coupled alkenyl succinimide ##STR8## wherein R is polyisobutenyl (c) acylating said mono-alkenyl succinimide with glycolic acid to form a glycolated Mannich phenol coupled mono-alkenyl succinimide ##STR9## and (d) recovering said glycolated Mannich phenol coupled mono-alkenyl succinimide.
Specification