Surface-modified silicas

Details Surface-modified silicas Surface-modified silicas

2011-07-19

2011-07-19

Wu, David (Department: 1762)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S482000, C524S493000, C523S209000, C523S216000, C423S332000, C423S337000

Reexamination Certificate

active

07981211

ABSTRACT:
Surface-modified, fumed silica having the data: BET surface area, m2/g: 25-400; Average primary particle size, nm: 5-50; pH: 3-10; Carbon content, % by weight: 0.1-10; Potassium content (calculated as potassium oxide), % by weight: 0.000001-40; is prepared by subjecting a fumed silica to surface modification in the presence of potassium compounds. It can be used in LSR silicone rubber compositions as a filler.

REFERENCES:
patent: 2002/0168524 (2002-11-01), Kerner et al.
patent: 2005/0215668 (2005-09-01), Scholz et al.
patent: 2005/0215696 (2005-09-01), Scholz et al.
patent: 2009/0076194 (2009-03-01), Meyer et al.
patent: 102 42 798 (2004-04-01), None
patent: 1 236 773 (2002-09-01), None
patent: 2006 053632 (2006-05-01), None

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