Aluminoxane catalyst activators derived from dialkylaluminum cation precursor agents, processes for making same, and use thereof in catalysts and polymerization of olefins
View Patent ↗Compositions useful for activating catalysts for olefin polymerization, and methods for making same, are provided. Such compositions can be derived from at least: an organoaluminum compound, a carrier, an oxygen source, and, optionally, a Lewis base.
1. A composition having one of the following structures:
wherein is a bulk aluminoxane (AO) structure, each R B , R P , and R 2 is independently a hydrocarbyl group having up to about 20 carbon atoms, and each Y is a pseudo halide radical, an alkoxide radical, an aryloxide radical, an alkyl substituted amide radical, an aryl substituted amide radical, a siloxy radical, a boronoxy radical, a diaryl boronoxy radical, or a halogenated diaryl boronoxy radical;
and a carrier, wherein said carrier is attached to said bulk aluminoxane structure.
2. The composition of claim 1 , wherein each R B , R P , and R 2 is methyl or iso-butyl.
3. The composition of claim 2 , wherein Y is alkoxide radical or aryloxide radical.
4. The composition of claim 3 , wherein Y is methoxide radical, ethoxide radical, isobutoxide radical, tert-butoxide radical, phenoxide radical, 2,6-di-tert-butyl-4-methyl-phenoxide radical, or pentafluorophenoxide radical.
5. The composition of claim 1 , wherein the composition has the structure of Formula I or Formula II.
6. The composition of claim 5 , wherein each R B , R P , and R 2 is methyl or iso-butyl and Y is a methoxide radical, tert-butoxide radical, phenoxide radical or pentafluorophenoxide radical.
7. A composition comprising the composition of claim 1 , and a transition metal component.
8. The composition of claim 1 , wherein said carrier is silica.
9. The composition of claim 1 , wherein the mole ratio of Y to the aluminum in the bulk aluminoxane structure is about 1:30 to about 8:25.
10. The composition of claim 1 , wherein each Y is independently an alkoxide radical, an aryloxide radical, an alkyl substituted amide radical, an aryl substituted amide radical, a siloxy radical, a boronoxy radical or a diaryl boronoxy radical.