Granted Patent
B2
US 7,282,236 · App. 10/623,051 · Granted Oct 16, 2007
Hydrophobic silica
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Abstract
Methods of making hydrophobic, pyrogenically produced silica having a tamped density, of 55 to 200 g/l. Said silica is produced by hydrophobizing pyrogenically produced silica by reaction with a halogen free silane and then compacting it with means consisting of a roller compactor or a belt filter press. The silica may be used for the production of dispersions.
Claims (1)
1. A process for the production of the finely divided, readily dispersible hydrophobic, pyrogenically produced silica in the form of aggregates having a tamped density of 55 to 200 g/l comprising hydrophobizing pyrogenically produced silica by reaction with a halogen-free silane and then compacting said silica with means consisting of a roller compactor or a belt filter press.
Assignments (4)
CHANGE OF NAME
Recorded Mar 29, 2020
From: EVONIK DEGUSSA GMBH
To: EVONIK OPERATIONS GMBH
Reel/Frame 052254/0052 →
CHANGE OF NAME
Recorded Feb 23, 2010
From: DEGUSSA GMBH
To: EVONIK DEGUSSA GMBH
Reel/Frame 024006/0127 →
CHANGE ADDRESS
Recorded Feb 22, 2010
From: EVONIK DEGUSSA GMBH
To: EVONIK DEGUSSA GMBH
Reel/Frame 023985/0296 →