Supported polymerisation catalysts

Details Supported polymerisation catalysts Supported polymerisation catalysts

2007-12-18

2007-12-18

Koslow, C. Melissa (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S103000, C502S117000, C502S118000, C502S104000, C502S150000, C526S172000, C526S161000, C526S134000

Reexamination Certificate

active

10523828

ABSTRACT:
A method for the preparation of a supported transition metal catalyst system which includes the steps of: (i) mixing together in a suitable solvent (a) an aluminoxane and (b) an ionic activator containing a cation and an anion, wherein the anion has at least one substituent containing a moiety having an active hydrogen, (ii) addition of the mixture from step (i) to a support material, and (iii) addition of a transition metal compound in a suitable solvent. The use of tetraisobutylaluminoxane as the aluminoxane results in a more stable activity profile and improved polymer properties in particular melt strength.

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