低い増粘効果を有する熱分解的に製造された二酸化ケイ素

Title:

低い増粘効果を有する熱分解的に製造された二酸化ケイ素

Document Type and Number:

Japanese Patent JP2010527879

Kind Code:

A

Abstract:

A pyrogenically prepared silicon dioxide powder (C1) in the form of aggregated primary particles has statistical thickness surface area (STSA) of 10-500 m 2>/g; thickening action, based on the STSA surface area of 4-8 mPasx g/m 2>; and micropore volume of 0.03-0.07 cm 3>/g. Independent claims are included for following: (1) preparing the pyrogenic silicon dioxide powder (C1) involving, mixing at least one hydrolyzable silicon compounds, oxygen-containing gas and/or primary combustion gas; igniting the mixture in a burner, burnt via pipe into a reaction chamber; passing secondary combustion gas into the reaction chamber and separating powder formed from gaseous substances, where the hydrogen ratio gamma(primary) of the raw material mixture is less than 1 and oxygen ratio lambda(primary) of the raw material mixture is greater than 1, gamma(primary) is defined as the combustion gas fed to the mixing chamber divided by the combustion gas required stoichiometrically and lambda(primary) is the oxygen supplied to the mixing chamber divided by the oxygen required stoichiometrically; and (2) a dispersion containing the pyrogenically prepared silicon dioxide powder (C1).

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Inventors:

Andreas fin
Florian Felix Kunizel
Volker ham
Matias lohonia

Application Number:

JP2010508763A

Publication Date:

August 19, 2010

Filing Date:

April 09, 2008

Export Citation:

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Assignee:

Evonik Degussa GmbH

International Classes:

C01B33/18; C01B33/141; C09D7/61; C09D11/00; C09D17/00; C09D201/00

Domestic Patent References:

JPH10212118A	1998-08-11
JP2006523172A	2006-10-12
JP2006509713A	2006-03-23
JPH10212118A	1998-08-11
JP2006523172A	2006-10-12
JP2006509713A	2006-03-23

Foreign References:

WO2006123433A1	2006-11-23
WO2006123433A1	2006-11-23

Attorney, Agent or Firm:

Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Takahashi
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard

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