PROCESSO PARA A PREPARACAO DE ACETAIS E CETAIS POLIVINILICOSC

A process for the production of polyvinyl acetals or ketals (I) comprises reacting polyvinyl alcohol (PVAL) with an aldehyde or ketone (II) in presence of a catalyst (III) containing acid groups which are chemically bonded to a 2-dimensional support which is insoluble in the reaction medium.

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT W. FUSS DR, MARTIN BAUMGARTNER DR, MATTHIAS GUTWEILER
Format:	Patent
Sprache:	por
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for the production of polyvinyl acetals or ketals (I) comprises reacting polyvinyl alcohol (PVAL) with an aldehyde or ketone (II) in presence of a catalyst (III) containing acid groups which are chemically bonded to a 2-dimensional support which is insoluble in the reaction medium.