| abstract |
Compositions useful for activating catalysts for the polymerization of olefin, and methods for their preparation, are provided; The compositions may be derived from at least: a) an intermediate composition derived from at least one organoaluminum compound, a carrier, and an oxygen source; and b) R22AlY, wherein each R2 independently comprises a hydrocarbyl group having 1 to 20 carbons, and Y comprises a halide radical, a pseudo halide radical, an alkoxide radical, an arylaxide radical, an alkyl substituted amide radical, a radical aryl substituted amide, a siloxy radical, a boronoxy radical, a boronoxy diaryl radical, or a halogenated diaryl boronoxy radical. |