PROCESSO DI POLIMERIZZAZIONE DI MONOMERI SOLFONICI

• Main Authors: APOSTOLO MARCO, ARCELLA VINCENZO
• Format: Patent
• Language: Italian
• Published: 27.08.2003
• Edition: 4
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOSITIONS BASED THEREON; CONDUCTORS; ELECTRICITY; INSULATORS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; THEIR PREPARATION OR CHEMICAL WORKING-UP

A polymerization process in microemulsion of: (I) one or more fluorinated monomers containing at least one ethylene unsaturation; (II) one or more fluorinated monomers containing sulphonyl groups -SO2F; said process comprising: a) preparation of an aqueous microemulsion, having a pH in the range 4-7, of perfluoropolyethers (PFPEs); b) feeding of the microemulsion to the polymerization reactor, in an amount higher than 18 ml per litre of reaction medium; c) introduction of the monomer (II) in liquid form into the reactor, reactor pressurization with the gaseous monomers (I); d) addition of the initiator, and feeding of the monomers (I) during the polymerization so as to maintain constant the reactor pressure.