Fully tuneable ethylene–propylene elastomers using a supported permethylindenyl-phenoxy (PHENI*) catalyst

Abstract

Using a highly active supported permethylindenyl-phenoxy (PHENI*) titanium catalyst, high molecular weight ethylene–propylene (EPM) and and ethylene–propylene–diene (EPDM) elastomers are prepared with tuneable compositions using slurry-phase catalysis.

Towards designer polyolefins: highly tuneable olefin copolymerisation using a single permethylindenyl post-metallocene catalyst

“…Recently, we reported solid-supported group four permethylindenyl-phenoxy (PHENI*) catalysts, which display outstanding performance for ethylene and propylene polymerisation, producing ultrahigh molecular weight homopolymers, 52,53 and tuneable copolymers. 54 In the latter case, ethylene–propylene copolymers were produced with polymer composition almost exactly corresponding to the feed ratio of gaseous monomers.…”

Trends in Structure and Ethylene Polymerization Reactivity of Transition-Metal Permethylindenyl-phenoxy (PHENI*) Complexes

“…Following the synthesis of permethylindenyl-based metallocenes, − Williams et al reported the synthesis of permethylindenyl CGC analogues of the type Me 2 SB­( R N,I*)­TiCl 2 ({(η 5 -C 9 Me 6 )­Me 2 Si­( R N)}­TiCl 2 , where I* = η 5 -C 9 Me 6 ). , Ethylene polymerization activities up to three times that of the Cp* (η 5 -C 5 Me 5 ) derivatives were reported, with more electron-donating amido fragments shown to result in increased catalytic activities . More recently, we have reported the permethylindenyl-phenoxy (PHENI*) ligand, offering exceptional performance in olefinic polymerizations producing ultrahigh-molecular-weight homopolymers and highly tunable copolymers. − …”