Lubricating oil dispersant 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 the process which comprises:
- (a) reacting a polyamine with an alkenyl succinic acid anhydride to form a bis-alkenyl succinimide;
(b) acylating said bis-alkenyl-succinimide with glycolic acid to form a partially glycolated bis-alkenyl succinimide;
(c) adding an excess of an aldehyde to said partially glycolated bis-alkenyl succinimide to form an iminium salt of the glycolated bis-alkenyl succinimide;
(d) adding a phenol to said iminium salt, thereby forming a Mannich phenol coupled glycamide bis-alkenyl succinimide; and
(e) recovering said Mannich phenol coupled glycamide bis-alkenyl succinimide.
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Abstract
A lubricating oil composition having improved dispersancy and viton seal compatibility. the dispersant being prepared by coupling partly glycolated succinimides with an aldehyde and a phenol.
119 Citations
17 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 the process which comprises:
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(a) reacting a polyamine with an alkenyl succinic acid anhydride to form a bis-alkenyl succinimide; (b) acylating said bis-alkenyl-succinimide with glycolic acid to form a partially glycolated bis-alkenyl succinimide; (c) adding an excess of an aldehyde to said partially glycolated bis-alkenyl succinimide to form an iminium salt of the glycolated bis-alkenyl succinimide; (d) adding a phenol to said iminium salt, thereby forming a Mannich phenol coupled glycamide bis-alkenyl succinimide; and (e) recovering said Mannich phenol coupled glycamide bis-alkenyl succinimide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A lubricating oil composition comprising a major portion of a lubricating oil and minor dispersant amount of a reaction product prepared by the process which comprises:
(a) reacting an alkenyl succinic acid anhydride with a polyamine ##STR7## where R'"'"' is H or a hydrocarbon selected from the group consisting of alkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl group;
R" is a hydrocarbon selected from the same group as R'"'"' except that R" contains one less H;
a is an integer of about 3 to about 8 and n is 0 or 1, to form a bis-alkenyl succinimide ##STR8## where R is polyisobutylene and x is an integer of 1 to 6;
(b) acylating said bis-alkenyl-succinimide with a carboxylic acid to form a partially glycolated bis-alkenyl succinimide ##STR9## (c) adding an excess of formaldehyde to said partially glycolated bis-alkenyl succinimide to form an iminium salt of the glycolated bis-alkenyl succinimide ##STR10## (d) adding a phenol to said iminium salt, thereby forming a Mannich base phenol coupled glycamide bis-alkenyl succinimide ##STR11## and (e) recovering said acylated Mannich phenol coupled glycamide bis-alkenyl succinimide.
Specification