Patent ID: 6649661
Filing Date: 2003-11-18
Classification: B41M,B82Y,C01F,C01P,C09D,D21H,Y10T

Abstract:
A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having an average pore radius of 20 to 200 Ã¥ and a half breadth of pore radius distribution of 20 to 150 Ã¥, wherein when the alumina hydrate is dispersed in water at a solids concentration of 15% by weight to form a dispersion, the dispersion has a viscosity not higher than 75 cP as measured at 20Â° C. and a shear rate of 7.9 secâˆ’1.