Dispersion of high surface area silica

Details Dispersion of high surface area silica Dispersion of high surface area silica

2011-04-05

2011-04-05

Green, Anthony J (Department: 1731)

Compositions: coating or plastic

Materials or ingredients

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

C106S286700, C106S287100, C106S287340, C423S322000

Reexamination Certificate

active

07918933

ABSTRACT:
Dispersion comprising water and mixed potassium silicon oxide powder, where—the mixed oxide powder is in the form of aggregates of primary particles, has a BET surface area of 100 to 400 m2/g, has an average aggregate diameter in the dispersion of less than 100 nm, and possesses a potassium fraction of 0.05% to 1.5% by weight, calculated as K2O and based on the mixed oxide powder, and—the dispersion has a fraction of mixed oxide powder in the dispersion of 25% to 40% by weight, the sum of water and mixed oxide powder is at least 98% by weight and the pH is 9 to 11.5.

REFERENCES:
patent: 6676719 (2004-01-01), Lortz et al.
patent: 2002/0134027 (2002-09-01), Lortz et al.
patent: 2006/0104881 (2006-05-01), Lortz et al.
patent: 1 216 958 (2005-07-01), None
patent: 2005 154222 (2005-06-01), None
patent: 2004 089816 (2005-10-01), None

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