Pyridinium Metathesis Catalysts For Cycloolefin¹Polymerization

摘要

This invention pertains to the use of pyridinium isopoly and heteropoly molybdates and tungstates as catalysts in a metathesis catalyst system in polymerization of norbornene-type monomers by ring opening polymerization. Polymerization can be by reaction injection molding in absence of a solvent whereby a thermoset polymer is produced or by solution polymerization in presence of a suitable solvent whereby a thermosetting or a thermoplastic polymer is produced. The monomers are selected from polycycloolefins containing at least one norbornene group and mixtures thereof.