Polyalkenamers of wide molecular-weight distribution
AssigneeBayer Aktiengesellschaft
InventorsManfred Beck, Rainer Fritz, Dieter Theisen
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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.degree.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.
Claims8
A process for the ring-opening polymerisation of a cyclic olefin comprising:
- i. polymerising the cyclic olefin in the presence of a catalyst comprising:
- a. a metal halide of Groups VB or 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 co-catalyst at temperatures of from -70 to +60.degree.C, and
- ii. adding from 0.01 to 10% by weight, based on the monomer used, of a Defo hardness increasing compound containing a C=C-double bond in conjugation with a CO-double bond, either during or after polymerisation.
Dependencies are inferred from the claim text.