Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-01-30
2007-01-30
Lu, Caixia (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S131000, C526S161000, C526S165000, C526S348000, C526S943000, C502S155000
Reexamination Certificate
active
10667711
ABSTRACT:
The present invention relates to compounds in which a transition metal is complexed by at least two ligand systems and at least two of the systems are reversibly joined to one another by at least one bridge comprising a donor and an acceptor, wherein at least one fluorenyl ligand is present and at least one substituent on the acceptor group is an alkyl or aryl radical. The invention further relates to the use of these compounds having a donor-acceptor interaction as polymerization catalysts for preparing high molecular weight elastomers.
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Ostoja Starzewski Karl-Heinz Aleksander
Steinhauser Norbert
Bayer Aktiengesellschaft
Lu Caixia
Seng Jennifer R.
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