PROCESS FOR MAKING A SOLUTION OF COPOLYMERS OF MALEIC ANHYDRIDE AND ALKYL VINYL ETHER IN ISOPROPYL ACETATE OF HIGH SPECIFIC VISCOSITY AND AT A HIGH SOLIDS LEVEL

PROCESS FOR MAKING A SOLUTION OF COPOLYMERS OF MALEIC ANHYDRIDE AND ALKYL VINYL ETHER IN ISOPROPYL ACETATE OF HIGH SPECIFIC VISCOSITY AND AT A HIGH SOLIDS LEVEL

A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6 preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and...

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Bibliographische Detailangaben
Hauptverfasser: KWAK, YOON, TAE, CARLIN, ALAN, J, KOPOLOW, STEPHEN, L
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6 preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and a solids content of about 20-45% preferably 30-40, in isopropyl acetate (IPAc), solvent includes the steps of (a) precharging part of MVE in IPAc into a reactor heated to about 50-90°C, and then (b) feeding (i) a solution of MA in IPAc, (ii) the rest of MVE, at a mole ratio of MA:MVE of 1:>=1.5 to 1: