Catalyst precursor and olefin polymerization processes

Details Catalyst precursor and olefin polymerization processes Catalyst precursor and olefin polymerization processes

Filed on

2005-08-09

Date issued

2005-08-09

Examiner

Harlan, Robert D. (Department: 1713)

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Polymers from only ethylenic monomers or processes of...

Other Related Categories

C526S132000, C526S161000, C526S155000, C526S167000

Type

Reexamination Certificate

Status

active

Patent number

06927263

Description

ABSTRACT:
Catalyst precursor compounds having both (i) a polydentate ligand which comprises a cyclic moiety as well as a heteroatom and (ii) a protected hydride/hydrocarbyl ligand bonded to a metal atom, as well as olefin polymerization catalyst systems based thereupon, polymerization processes using such catalyst systems and polymers produced thereby.

REFERENCES:
patent: 6187712 (2001-02-01), Peterson
patent: 6399725 (2002-06-01), Eilerts
patent: WO 99/01460 (1999-01-01), None
Cloke et al., “Zirconium Complexes incorporating the New Tridentate Diamide Ligand[(Me3Si)N{CH2CH2N(SiMe3)}2]2−(L);the Crystal Structures of[Zr(BH4)2L]and[ZrCI{CH(SiMe3)2)}L]” J. Chem Soc. Dalton Trans 1995 25-30 (Jul.).

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