Exxonmobil Chemical Patents Inc.

Arkady K Golenishchev

Alexander Z Voskoboynikov

Dmitry Vadimovich Uborsky

Ilya S Borisov

John Robert Hagadorn

Georgy Pavlovich Goryunov

Jo Ann M Canich

Vyatcheslav V Izmer

Dmitry S Kononovich

Oleg Vladimirovich Samsonov

Pavel Sergeevich Kulyabin

Michail I Sharikov

Oleg V Samsonov

This invention relates to novel bridged a hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 positions with a Cto Calkyl, where the 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and/or carbon atoms that make up the cyclic ring.

Substituted metallocene catalysts

Disclosed are new classes of pyridyldiamide catalyst components useful in olefin polymerization, an example of which includes: wherein M is a hafnium or zirconium; Rand Rare selected from phenyl and substituted phenyl, wherein the substitutions are selected from Cto Chydrocarbyls, preferably Cto Chydrocarbyls, and can reside in any of the ortho, meta, para positions on the phenyl ring; Rand Rare selected independently from hydrogen and Cto Chydrocarbyls, preferably hydrogen; Ris a hydrocarbyl bridging group; R, R, and Rare independently selected from hydrogen, hydrocarbyls, and substituted hydrocarbyls; and R, R, R, and Rare independently selected from hydrogen, hydrocarbyls, and substituted hydrocarbyls; wherein Rand Rform an aromatic ring or Ris hydrogen and Ris selected from methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, and tert-butyl, preferably methyl.

Pyridyldiamide metal catalysts and processes to produce polyolefins

Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization.

Pyridyldiamido transition metal complexes, production and use thereof

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Moscow, Russia

Arkady K Golenishchev