Core-shell particles for use as a filler for feeder compositions

Abstract

The invention relates to core-shell particles for use as a filler for feeder compositions for producing feeders, comprising (a) a core which possesses one or more cavities and a wall surrounding these cavities, where the core (a) has an average diameter in the range from 0.15 to 0.45 mm, (b) a shell enclosing the core and consisting of or comprising (b1) particles comprising or consisting of a material from the group consisting of calcined kaolin or cordierite, where the particles (b1) have a d10 of at least 0.05 μm and a d90 of at most 45 μm, and also (b2) a binder which binds the particles (b1) to one another and to the core (a).

Dependencies are inferred from the claim text.