Core-shell particles for use as a filler for feeder compositions
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United States of America Patent
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Dec 15, 2020
Grant Date -
Jul 4, 2019
app pub date -
Jun 27, 2017
filing date -
Jun 30, 2016
priority date (Note) -
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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).
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