PROCESS FOR SELECTIVELY POLYMERIZING ETHYLENE AND CATALYST THEREFOR
申请人:Klosin Jerzy
公开号:US20110282018A1
公开(公告)日:2011-11-17
The present invention generally relates to a process that selectively polymerizes ethylene in the presence of an alpha-olefin, and to a metal-ligand complex (precatalyst) and catalyst useful in such processes, and to related compositions. The present invention also generally relates to ligands and intermediates useful for preparing the metal-ligand complex and to processes of their preparation.
A polymer includes repeat units having the structure
wherein R
1
, R
2
, Ar
1
, Ar
2
, and Ar
3
are defined herein. The polymer can be prepared by Suzuki polycondensation. The acetal and/or ketal functionality in the polymer backbone make the backbone-cleavable in acid. The polymer is useful in applications including lithographic photoresists.
FIVE-COORDINATE BIS-PHENYLPHENOXY CATALYSTS FOR THE PREPARATION OF ETHYLENE-BASED POLYMERS
申请人:Dow Global Technologies LLC
公开号:EP3227304B1
公开(公告)日:2020-01-29
Catalyst Compositions and Use Thereof
申请人:ExxonMobil Chemical Patents Inc.
公开号:US20180134817A1
公开(公告)日:2018-05-17
This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bonded to the metal by dative bonds and a silyl or germyl bridge, catalyst systems comprising such, and polymerization processes using such.