PRODUCTION OF AN ETHANOL SOLUTION OF ETHYL OR BUTYL HALF-ESTER OF A COPOLYMER

PRODUCTION OF AN ETHANOL SOLUTION OF ETHYL OR BUTYL HALF-ESTER OF A COPOLYMER

2129333 9319126 PCTABS00025 A process for the production of an ethanol solution of an ethyl or butyl alkyl half-ester copolymer of maleic anhydride and an alkyl vinyl ether which comprises: (a) copolymerizing the monomers in acetone as solvent by simultaneously feeding molten maleic anhydride, a mol...

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Hauptverfasser: TAZI, MOHAMMED, ZAMORA, JOHN N, CARLIN, ALAN J
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Sprache:eng ; fre
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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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creator TAZI, MOHAMMED
ZAMORA, JOHN N
CARLIN, ALAN J
description 2129333 9319126 PCTABS00025 A process for the production of an ethanol solution of an ethyl or butyl alkyl half-ester copolymer of maleic anhydride and an alkyl vinyl ether which comprises: (a) copolymerizing the monomers in acetone as solvent by simultaneously feeding molten maleic anhydride, a molar excess of methyl vinyl ether, and a solution of a free radical initiator in acetone, into a reactor precharged with acetone, at about 68-85 ·C, preferably 70-80 ·C; (b) esterifying the acetone solution of said copolymer with ethanol or butanol; and (c) solvent exchanging ethanol for acetone by continuously injecting vapors of ethanol at about 85-95·C into said copolymer solution while simultaneously distilling out acetone therefrom at atmospheric pressure.
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subjects 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
title PRODUCTION OF AN ETHANOL SOLUTION OF ETHYL OR BUTYL HALF-ESTER OF A COPOLYMER
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