Patent ID: 6518445
Filing Date: 2003-02-11
Classification: C07F,C08F,Y10S

Abstract:
A methylaluminoxane composition wherein (A) the composition is a solid at 25Â° C.; (B) the composition has a total aluminum content in the range of about 39 to about 47 wt % based on the total weight of the composition in the solid state; (C) the composition is either free of aluminum in the form of trimethylaluminum or if trimethylaluminum is present in the composition, not more than about 30 mole % of the total aluminum present in the composition is in the form of trimethylaluminum; (D) the composition in the solid state contains no more than about 2000 ppm (wt/wt) of aromatic hydrocarbon; (E) the cryoscopic number average molecular weight of the composition as determined in benzene is at least about 1000 atomic mass units; and (F) the composition has sufficient solubility in n-heptane at 25Â° C. to provide a solution containing at least 4 wt % of dissolved aluminum.