Diiscyanate acid 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 polyethylene amine 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 a diisocyanate to partially or fully glycolated bis-succinimide thereby forming a diurea or respective urethane coupled glycamide bis-alkenyl succinimide; and
(d) recovering said diurea or urethane coupled glycamide bis-alkenyl succinimide.
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Abstract
A lubricating oil composition having improved dispersancy. The dispersant being prepared by coupling partially glycolated succinimides with an organic diisocyanate.
34 Citations
13 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 polyethylene amine 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 a diisocyanate to partially or fully glycolated bis-succinimide thereby forming a diurea or respective urethane coupled glycamide bis-alkenyl succinimide; and (d) recovering said diurea or urethane coupled glycamide bis-alkenyl succinimide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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 polyethylene amine ##STR6## where R1 is H or a hydrocabon selected from the group consisting of alkyl, alalkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl group;
R2 is a hydrocarbon selected from the same group as R1 except that R2 contains one less H;
a is an integer of about 1 to about 6 and is 0 or 1, to form a bis-alkenyl succinimide ##STR7## where R is polyisobutylene and x is an integer of 1 to 6;
(b) acylcating said bis-alkenyl-succinimide with glycolic acid to form a partially glycolated bis-alkenyl succinimide ##STR8## (c) adding a diisocyanate to said partially or fully glycolated bis-alkenyl succinimide thereby forming a diurea coupled glycamide bis-alkenyl succinimide ##STR9## and (d) recovering said acylated diurea coupled glycamide bis-alkenyl succinimide.
Specification