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:
Jul. 21, 1998
Filed:
May. 25, 1995
Jacob I Emert, Brooklyn, NY (US);
Joseph V Cusumano, Watchung, NJ (US);
David C Dankworth, Whitehouse Station, NJ (US);
William D Diana, Belle Mead, NJ (US);
William B Eckstrom, Fanwood, NJ (US);
Keith R Gorda, Little York, NJ (US);
Antonio Gutierrez, Mercerville, NJ (US);
Jon E Stanat, Westfield, NJ (US);
Warren A Thaler, Flemington, NJ (US);
Stephen Zushma, Clinton, NJ (US);
Exxon Chemical Patents Inc., Linden, NJ (US);
Abstract
A process for preparing polymeric amides is disclosed. The process comprises sequentially reacting a hydrocarbon polymer functionalized (e.g., via the Koch reaction) to contain acid, ester, thioacid and/or thioester groups with a heavy polyamine to form a partially derivatized product in which at least about 85% of the functional groups are converted to heavy (thio)amide groups, and then reacting the partially derivatized product with an excess of light amine to complete the derivatization by converting substantially all of the remaining functional groups to light (thio)amide groups. Products of the foregoing process are also disclosed, which products are useful as additives in fuels and in lubricants.