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US 12,662,387 B2Granted
Precipitated silicic acids, process for their preparation and use thereof
AssigneeEvonik Operations GmbH
InventorsAndré Wehmeier, Dominik Maschke, Agnieszka Ochenduszko
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Abstract
Precipitated silicas having, a N-cetyl-N,N,N-trimethylammonium bromide (CTAB) surface area ≤115 m2/g, a dioctyl adipate (DOA) absorption ≥130 ml/(100 g), a RoTap for >300 μm of ≥86%, and a pore volume distribution of V (d5−d50)/V (d5−d100)<0.66. A method of producing the precipitated silicas.
Claims9
Precipitated silicas, having:
- a N-cetyl-N,N,N-trimethylammonium bromide (CTAB) surface area ≤115 m2/g,
- a dioctyl adipate (DOA) absorption ≥130 ml/(100 g),
- a RoTap for >300 μm of ≥86%,
- a silanol group density ≥5.4 OH/nm2, and
- a pore volume distribution of V (d5−d50)/V (d5−d100)<0.66.
2 more elements
Dependencies are inferred from the claim text.