Heteropolymetallate metathesis catalysts for cycloolefin polymer

Details Heteropolymetallate metathesis catalysts for cycloolefin polymer Heteropolymetallate metathesis catalysts for cycloolefin polymer

1989-02-21

1990-05-08

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526114, 526129, 526132, 526137, 526144, 526161, 526166, 526281, 526282, 526283, 2643286, C08F 478, C08F 3204

Patent

active

049239368

ABSTRACT:
This invention pertains to the use of organoammonium, organophosphonium, organoarsonium heteropolymolybdates and heteropolytungstates, and mixtures thereof, as catalysts in a metathesis catalyst system in polymerization of cycloolefin 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 cycloolefin monomers are selected from monocycloolefins except cyclohexane, polycycloolefins containing at least one norbornene group, and mixtures thereof.

REFERENCES:
patent: 3098862 (1963-07-01), Kobetz
patent: 4380617 (1983-04-01), Minchak et al.

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