Process for the preparation of a copolymer of maleic anhydride and an alkyl vinyl ether, copolymers of maleic anhydride and an alkyl vinyl ether and an apparatus

Rolf A.T.M. van Benthem (Inventor), J.P. Friederichs (Inventor), D.J.J.S. Moreau (Inventor)

Research output: PatentPatent publication

Abstract

Process for the preparation of a copolymer of maleic anhydride and an alkyl vinyl ether, comprising the steps of supplying maleic anhydride and the alkyl vinyl ether and an initiator, together forming a feed flow, through an inlet to a reactor wherein maleic anhydride and the alkyl vinyl ether react to a copolymer of maleic anhydride an alkyl vinyl ether thereby forming a reaction mixture with the maleic anhydride, the alkyl vinyl ether and the initiator characterized in that the process is a continuous process and the reactor is a loop reactor wherein the reaction mixture is internally circulated, whereby this reaction mixture arrives at
the inlet before the maleic anhydride and alkyl vinyl ether have completely reacted while a remainder of initiator is still present. The invention further relates to copolymer of maleic anhydride and alkyl vinyl ether, including hydrolyzed or alcoholized copolymers, characterized in that a molecular weight distribution, expressed as Mw/Mn, is less than 2. The invention also relates to an apparatus
for conducting the process of the invention.
Original languageEnglish
Patent numberWO/03/064482
Priority date28/01/02
Filing date22/01/03
Publication statusPublished - 7 Aug 2003

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