Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-05-09
2006-05-09
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S170000, C526S943000, C526S941000, C502S103000, C556S053000
Reexamination Certificate
active
07041756
ABSTRACT:
Provided is a catalyst component for producing a polyolefin, which catalyst component comprises a metallocene catalyst having a structure according to formula (I): (THI)2R″MQp, wherein each THI is a tetrahydroindenyl derivative which may be substituted or unsubstituted, provided that at least one of the tetrahydroindenyl derivatives is substituted at the 2-position or the 4-position; R″ is a structural bridge to impart stereorigidity between the two THI groups; M is a metal from Group IIIB, IVB, VB or VIB; Q is a hydrocarbyl group having from 1–20 carbon atoms, or a halogen; and p is the valence of M minus 2.
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Jackson William D.
Lee Rip A
Total Petrochemicals Reseach Feluy
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