| abstract |
The present invention relates to microparticulate materials which have nanoparticulate cores made of inorganic material and on the surface of which there are oligomeric or polymeric structures which contain non-acidic, nucleophilic groups, the cores via an interaction of the non-acidic, nucleophilic groups with at least one further constituent, which contains electrophilic groups, are agglomerated. The present invention furthermore relates to catalysts which are built up from these materials, and to production processes for these materials or catalysts and the use of the catalysts for olefin polymerization or a polymerization process using the catalysts. |