| abstract |
A process for the ring-opening polymerisation of cyclic olefins on catalysts of A. A HALIDE OF A METAL OF Groups VB and VIB of the Periodic System, B. AN ORGANOMETALLIC COMPOUND OF A METAL OF Groups IIA, IIIA and IVa of the Periodic System, and C. OPTIONALLY A COCATALYST, OPTIONALLY IN AN INERT ORGANIC SOLVENT AT TEMPERATURES OF FROM -70 TO +60 DEG C, wherein from 0.1 to 10% by weight, based on monomer, of a compound containing a C=C-double bond in conjugation with a CO-double bond is added during or after polymerisation in the presence of the active catalyst. |