A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10 transition metal, M, and at least one anionic heterocyclobutenyl ligand that is bonded to M. Molecular modeling results indicate that single-site catalysts based on anionic heterocyclobutenyl ligands will have advantages compared with the performance of catalysts based on cyclopentadienyl and substituted cyclopentadienyl ligands.

Um catalizador da polimerização do olefin do único-local e um método de fazê-lo são divulgados. O catalizador compreende um activador e um complexo organometallic. O complexo compreende um metal da transição do grupo 3 a 10, M, e ao menos um ligand anionic do heterocyclobutenyl que é ligado a M. Molecular que modela resultados indica que os catalizadores do único-local baseados em ligands anionic do heterocyclobutenyl terão as vantagens comparadas com o desempenho dos catalizadores baseados no cyclopentadienyl e em ligands substituídos do cyclopentadienyl.

 
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< Catalysts for the oxidative dehydrogenation of hydrocarbons

< Process for making olefins

> Polyolefin compositions having variable density and methods for their production and use

> Method for catalytic polymerization of alpha-olefin monomers using an ultra-high activity non-metallocene pre-catalyst

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