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Title:
消泡剤組成物用の疎水性の沈降ケイ酸
Document Type and Number:
Japanese Patent JP4778244
Kind Code:
B2
Abstract:
Hydrophobically precipitated silica with a BET surface area of less than 110 m 2>/g, a cetyl trimethyl ammonium chloride (CTAB) surface area of less than 150 m 2>/g, a BET/CTAB ratio of less than 3, a carbon content of more than 3.1% and a pH of more than 9, is new. Independent claims are also included for: (1) producing hydrophobic precipitated silica by precipitating silica, filtering the precipitate, diluting the filter cake with water, adding a base, drying the suspension, heat-treating the product at a temperature above 150[deg]C and grinding the product, where a hydrophobizing agent is added to the silica or to a dispersion or filter cake comprising the silica; (2) hydrophobic precipitated silica produced as above.

Inventors:
Christian pants
René Aradesse
Helga Opraden
Mario rebbs
Anya Lucas
Laurent Bergmann
Karl Meier
Application Number:
JP2005028110A
Publication Date:
September 21, 2011
Filing Date:
February 03, 2005
Export Citation:
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Assignee:
Evonik Degussa GmbH
International Classes:
C01B33/18; B01D19/04; B01J32/00; C01B33/193; C08K3/34; C08L83/04; C09C1/30
Domestic Patent References:
JP2003137532A
JP3045511A
JP7172815A
JP11157826A
JP2000072434A
JP2000514031A
JP2003183017A
JP2003253120A
JP2005220014A
JP2005534610A
JP2007524555A
Foreign References:
WO2003014020A1
US3714068
EP1018354A1
Attorney, Agent or Firm:
Toshio Yano
Takuya Kuno
Einzel Felix-Reinhard



 
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