US2002037936A1PendingUtilityA1

Hydrophobic silica

37
Priority: Dec 22, 1999Filed: Dec 20, 2000Published: Mar 28, 2002
Est. expiryDec 22, 2019(expired)· nominal 20-yr term from priority
Inventors:Gunther MichaelVolker KasackRudiger Nowak
C01P 2006/90C01P 2004/50C01P 2006/20Y10T428/2995C09C 1/3684C09C 1/3036C01P 2006/80C01P 2006/11C09C 1/3081C09C 1/309C01P 2004/61C01B 33/18C01P 2006/10C01P 2006/22
37
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Claims

Abstract

Hydrophobic, pyrogenically produced silica having a tamped density of 55 to 200 g/l is produced by hydrophobizing pyrogenically produced silica and then compacting it. The silica may be used for the production of dispersions.

Claims

exact text as granted — not AI-modified
1 . A hydrophobic, pyrogenically produced silica, having a tamped density of 55 to 200 g/l.  
     
     
         2 . The hydrophobic, pyrogenically produced silica according to  claim 1  having a tamped density of 60 to 200 g/l.  
     
     
         3 . The hydrophobic, pyrogenically produced silica according to  claim 1  which is hydrophobicized by reaction with a halogen-free silane.  
     
     
         4 . The hydrophobic, pyrogenically produced silica according to  claim 4  wherein said silica has a chloride content of less than or equal to 100 ppm.  
     
     
         5 . A process for the production of the hydrophobic, pyrogenically produced silica as claimed in  claim 1 , comprising hydrophobizing pyrogenically produced silica and then compacting said silica.  
     
     
         6 . The process according to  claim 5  wherein said compacting is by roller compactor.  
     
     
         7 . The process according to  claim 5  wherein said compacting is by belt filter press.  
     
     
         8 . A hydrophobic, pyrogenically produced silica having been produced by the process of  claim 5 .  
     
     
         9 . Use of the hydrophobic, pyrogenically produced silica as claimed in  claim 1  for the production of dispersions.  
     
     
         10 . A dispersion of a hydrophobic, pyrogenically produced silica produced by the process of claim  5 .

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