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Li Ja Patents |
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Inventor: Ja; Li
Address: Chicago, IL
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5502017 |
Metallocene catalyst containing bulky organic group |
March 26, 1996 |
| An ionic metallocene catalyst for olefin polymerization which comprises: (1) a cyclopentadienyl-type ligand, a Group IVB transition metal, and alkyl, aryl, or hydride substituents, as a cation, and (2) a weakly coordinating anion comprising boron substituted with halogenated, such as |
| 5447895 |
Sterically shielded diboron-containing metallocene olefin polymerization catalysts |
September 5, 1995 |
| A non-coordinating anion, preferably containing a sterically shielded diboron hydride, if combined with a cyclopenta-dienyl-substituted metallocene cation component, such as a zirconocene metallocene, is a useful olefin polymerization catalyst component. The anion preferably has the |
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