The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1995
Filed:
Jun. 22, 1994
Cyril A Migdal, Croton-on-Hudson, NY (US);
Willy P Broeckx, Rumst, BE;
John F Lucas, Campbell Hall, NY (US);
Texaco Inc., White Plains, NY (US);
S.A. Texaco Belgium N.V., , BE;
Abstract
A lubricating oil composition comprising a major portion of a lubricating oil and a minor amount of an additive. The additive is prepared by reacting a polyamine with an alkenyl succinic acid anhydride having a number average molecular weight of about 500 to about 10,000 at a temperature of 60.degree. C.-120.degree. C. to form mono-alkenyl succinimide, bis-alkenyl succinimide or a mixture of mono- and bis-alkenyl succinimide. 2-pyrrolidone-5-carboxylic acid is then added to form an acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide. The acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide is acylated with an acylating compound selected from the group consisting of glycolic acid, oxalic acid, lactic acid, 2-hydroxymethyl-propionic acid and 2,2-bis(hydroxymethyl) propionic acid at a temperature of about 150.degree. C. to about 185.degree. C., to form a mixed acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide and the mixed acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide is recovered.