Process for preparing metallocene procatalysts

Details Process for preparing metallocene procatalysts Process for preparing metallocene procatalysts

1996-12-20

1999-05-04

Wu, David W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556 13, 556 14, 556 19, 556 53, 502155, 526127, 526160, 526351, 526943, C07F 702, C07F 1700

Patent

active

059004975

ABSTRACT:
A process for producing metallocene procatalysts useful in a catalyst system for the polymerization of olefins, particularly to make stereospecific polymers, and more particularly polymerization to make isotactic polypropylene in which the product of a reaction between a suitable ligand and an alkali-alkyl is reacted with a transition metal salt in the presence of an accelerant that has at least one lone pair of electrons in its outer valence shell. When the metallocene procatalyst produced is used in a catalyst system for the production of isotactic polymers, specifically isotactic polypropylene, the metallocene procatalyst can be used without isolating and separating the racemic modification from the meso form.

REFERENCES:
patent: 4456695 (1984-06-01), Nimura et al.
patent: 4613581 (1986-09-01), Maruyama et al.
patent: 4892852 (1990-01-01), Sampson et al.
patent: 4931417 (1990-06-01), Miya et al.
patent: 4946816 (1990-08-01), Cohen et al.
patent: 4985576 (1991-01-01), Rohrmann et al.
patent: 5103030 (1992-04-01), Rohrmann et al.
patent: 5117020 (1992-05-01), Razavi
patent: 5145819 (1992-09-01), Winter et al.
patent: 5241025 (1993-08-01), Hlatky et al.
patent: 5317036 (1994-05-01), Brady, III et al.
patent: 5329033 (1994-07-01), Spaleck et al.
patent: 5331054 (1994-07-01), Fujita et al.
patent: 5349032 (1994-09-01), Miyake et al.
patent: 5455366 (1995-10-01), Rohrmann et al.
patent: 5470927 (1995-11-01), Turner et al.
patent: 5554776 (1996-09-01), Langhauser et al.

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