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1. (WO2001034663) IMPROVED PROCESS FOR MAKING POLYALKYLENE/MALEIC AHYDRIDE COPOLYMER

Pub. No.:    WO/2001/034663    International Application No.:    PCT/US2000/030382
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Sat Nov 04 00:59:59 CET 2000
IPC: C08F 8/46
Applicants: CHEVRON ORONITE COMPANY LLC
Inventors: HARRISON, James, J.
RUHE, William, R., Jr.
Title: IMPROVED PROCESS FOR MAKING POLYALKYLENE/MALEIC AHYDRIDE COPOLYMER
Abstract:
A process is provided for preparing a mixture of (1) a copolymer of a polyalkene and an unsaturated acidic reagent and (2) a polyakenyl derivative of an unsaturated acidic reagent, said process comprising (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator; and (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid. The product of the process can be used to make polysuccinimides that are useful in lubricating oil compositions.