Patent ID: 7799722
Filing Date: 2010-09-21
Classification: C08F,Y10S

Abstract:
1. A catalytic solution obtained by a process comprising the following steps: (a) contacting a solution of methylalumoxane (MAO) in an aromatic first solvent with a solution in a second solvent comprising at least one alumoxane different from methylalumoxane or at least one organo-aluminium compound of formula H (b) adding to the solution formed in step a, an alifatic third solvent having a boiling point higher than the aromatic first solvent and second solvent provided the second solvent is an aromatic solvent or the second solvent has a boiling point lower than the aromatic first solvent; (c) solubilizing a metallocene compound in the solution obtained in step a or in step b; and (d) substantially removing aromatic solvents, thereby forming a final solution having a molar concentration of the metallocene compound and a content of aromatic solvents; wherein the content of the aromatic solvents in the final solution obtained in step d) is lower than 2% by weight, the molar concentration of the metallocene compound in the final solution obtained in step d) ranges from 1·10