Chromium compounds, catalysts and ethylene polymers.

摘要

Polychromium compounds such as octakis( mu -trimethylsilylmethyl) tetrachromium (II) as well as a process to make these new compounds are disclosed. The compounds are useful in the production of, e.g., dual valene chromium catalysts useful in the production of linear low density polyethylene. Olefin polymerization catalysts are described which are based on solid inorganic oxides (such as silica) and such polychromium compounds. Linear low density ethylene homopolymers with specific short chain branching as well as polymerization processes to make these polymers using the specific catalyst described are also disclosed.