Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yutaka Mori0
Hanako Kato0
Katsuya Funayama0
Date of Patent
September 5, 2006
Patent Application Number
10255140
Date Filed
September 25, 2002
Patent Primary Examiner
Patent abstract
Silica with a large pore volume, a large specific surface area, a narrow pore distribution, low contents of unwanted metal impurities, and excellent physical properties such as high heat-resistance and water-resistance is provided. The silica has a mode pore diameter (Dmax) of 20 nm or less, and a solid-state Si nuclear magnetic resonance (hereinafter called solid-state Si NMR) spectrum of the silica includes a chemical shift (δ ppm) of Q4 peak meeting the following inequality (I).−0.0705×(Dmax)−110.36>δ (I)
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