Process for the preparation of cycloolefin polymers

Details Process for the preparation of cycloolefin polymers Process for the preparation of cycloolefin polymers

1990-07-05

1992-02-11

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526127, 526132, 526281, C08F 462

Patent

active

050876775

ABSTRACT:
Polymers of polycyclic olefins of the formulae I to IV having a viscosity number greater than 20 cm.sup.3 /g and a glass transition temperature above 100.degree. C. are obtained without ring opening at a high polymerization rate and at polymerization temperatures advantageous from the technical point of view by means of a catalyst which is composed of a stereo-rigid, chiral metallocene compound of groups IVb to VIb of the Periodic Table of the Elements and an aluminoxane. ##STR1##

REFERENCES:
patent: 3557072 (1971-01-01), Vergne et al.
patent: 4178424 (1979-12-01), Tenney et al.
patent: 4948856 (1990-08-01), Minchak et al.

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