Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-05-08
2007-05-08
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...
C526S165000, C526S172000, C502S103000, C502S152000, C502S155000, C556S022000, C556S053000
Reexamination Certificate
active
11078588
ABSTRACT:
This invention relates to a metallocene compounds represented by formula:whereinM is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom;E is an indenyl ligand that is substituted with a PR2group in the two position of the indenyl ligand, where each R is, independently a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl substituent, and additionally, E may be substituted with 0, 1, 2, 3, 4, 5 or 6 Rnwhere each Rnis, independently, a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituent, and optionally, two or more adjacent Rnsubstituents may join together to form a substituted or unsubstituted, saturated, partially unsaturated, or aromatic cyclic or polycyclic substituent;A is a substituted or unsubstituted cyclopentadienyl ligand, a substituted or unsubstituted heterocyclopentadienyl ligand, a substituted or unsubstituted indenyl ligand, a substituted or unsubstituted heteroindenyl ligand, a substituted or unsubstituted fluorenyl ligand, a substituted or unsubstituted heterofluorenyl ligand, or other mono-anionic ligand, or A may, independently, be defined as E or as X;each X is, independently, an univalent anionic ligand, or both X are joined and bound to the metal atom to form a metallocycle ring, or both X join to form a chelating ligand, a diene ligand, or an alkylidene ligand.
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Canich Jo Ann M.
Izmer Vyatcheslav V.
Kazyulkin Denis N.
Ryabov Alexey N.
Voskoboynikov Alexander Z.
ExxonMobil Chemical Patents Inc.
Lu Caixia
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