Fumed silanized silica

• US 8,552,107 B2
• Filed: 02/28/2012
• Issued: 10/08/2013
• Est. Priority Date: 12/23/2005
• Status: Active Grant

• Current Assignee: Evonik Operations GmbH (Rag-Stiftung)
• Original Assignee: Evonik Degussa GmbH
• Inventors: Scholz, Mario, Meyer, Jrgen
• Primary Examiner(s): Peng, Kuo-Liang
• Application Number:
  US13/406,727
• Publication Number:
  US 20120220694A1
• Time in Patent Office: 588 Days
• Field of Search: 524/588
• US Class Current: 524/588
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01B 33/183 by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
• CPC Class Codes: C01P 2004/52 highly monodisperse size distribution
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2006/11 Powder tap density
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/22 Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C09C 1/3081 Treatment with organo-silicon compounds

Abstract

Fumed silanized silica with the following physico-chemical data: Grindometer value less than 20 .mu.m Tamped density 25 to 85 g/l is prepared by grinding fumed silica which has been silanized. It can be used in silicone rubber.

Claims

1. Fumed silanized silica having the following physiochemical data:

2. A process for preparing the fumed silanized silica according to claim 1, comprising silanizing by means of dimethyldichlorosilane a fumed silica having the following physiochemical data:

3. Silicon rubber containing as a filler the fumed silanized silica according to claim 1.