| http://www.w3.org/ns/prov#value | - Typical alkyl aluminum compounds that are suitable for use in this invention are the aluminoxanes, such as methylaluminoxane (hereinafter referred to as ???MAO???) or alkyl aluminum compounds having the formula RxAlX3???x, where R is a hydrocarbyl group, X is a halide (e.g., Cl or Br), and 0<x???3.
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