Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2004-02-05
2009-06-09
Wu, David (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S161000, C526S351000
Reexamination Certificate
active
07544749
ABSTRACT:
A catalyst system obtained by reacting at least one chiral transition metal compound and at least one cocatalyst, where the chiral transition metal compound is a transition metal compound of formula (Ia) or one of its enantiomers of the formula (Ia*),whereM is an element of Group 4,Z are each halogen, hydrogen, C1-C10-alkyl, C6-C14-aryl, alkylaryl or arylalkyl having from 1 to 4 carbon atoms in the alkyl part and from 6 to 10 carbon atoms in the aryl part,n1 and n2 are each 0 or 1,R1and R2are each a C1-C40radical, or R1and R2together with the atoms connecting them form a cyclic or polycyclic ring system,R5and R6are each hydrogen or a C1-C40radical,R10, R11are each hydrogen, t-butyl or phenyl,R12are each t-butyl or phenyl, andR13are each hydrogen or a C1-C40radical.
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Elder Michael J.
Ewen John A.
Jones Robert L.
Seidel Naka
Basell Polyolefine GmbH
Lee Rip A.
Reid William R.
Wu David
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