Process for the preparation of chemically homogeneous cycloolefi

Details Process for the preparation of chemically homogeneous cycloolefi Process for the preparation of chemically homogeneous cycloolefi

1993-08-09

1994-06-28

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526127, 526132, 526281, 502155, C08F 462

Patent

active

053248015

ABSTRACT:
Chemically homogeneous cycloolefin copolymers of polycyclic olefins, such as, for example, norbornene or tetracyclododecene, with cycloolefins and/or acyclic olefins are obtained without ring opening and in a high space-time yield if a catalyst system is used which comprises an aluminoxane and a stereorigid metallocene compound of an element from groups IVb to VIb, of the formula ##STR1## the part of the metallocene molecule formed by M.sup.1 and the substituents R.sup.16 -R.sup.17 having C.sub.1 -symmetry or being in the meso-form.

REFERENCES:
patent: 4178424 (1979-12-01), Tenney et al.
patent: 4948856 (1990-08-01), Minchak et al.
patent: 5003019 (1991-03-01), Ishimaru et al.
patent: 5087677 (1992-02-01), Brekner et al.
Patent Abstract of Japan vo. 11, No. 60 (C-405)(2507) Feb. 24, 1987, corresponding to UP-A-61 221 206.
European Search Report 92103538.2 Jun. 23, 1992.

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