Patent ID: 7910764
Filing Date: 2011-03-22
Classification: C07F,C08F

Abstract:
1. A polymethylaluminoxane composition generated by thermal decomposition of an alkylaluminum compound having an aluminum-oxygen-carbon bond, the alkylaluminum compound being generated by a reaction between trimethylaluminum and benzoic acid, with toluene as a solvent, wherein: (i) a mole fraction of methyl groups originating from trimethylaluminum, relative to the total moles of methyl groups existing in the generated polymethylaluminoxane composition, is not more than 26 mol %; (ii) the generated polymethylaluminoxane composition has a viscosity of not more than 2.1×10 (iii) an aluminum concentration of the generated polymethylaluminoxane composition is in a range of from 9.1 wt % to 9.4 wt %, and (iv) the generated polymethylaluminoxane composition does not generate gels when stored at 25° C. for 90 days.