C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
134/51
C01B 33/148 (2006.01) C01B 33/145 (2006.01)
Patent
CA 1314457
ABSTRACT OF THE DISCLOSURE A stable silica sol has an SiO2 concentration of 40 % or less. The sol contains amorphous colloidal silica particles each having a particle size D1 of from 40 to 500 my, as measured by the dynamic light-scattering method, the particles being dispersed in a liquid medium. Each particle has a shape elongated in only one plane and has a uniform thickness of from to 40 mµ along the elongation. The degree of particle elongation is from 5 to 30 in terms of size ratio D1/D2, where the particle size, D2 mµ, is calculated from the formula D2 = 2720/S where S is a specific surface area (m2/g) of the particles to be measured by the nitrogen gas-adsorbing method (BET). Also disclosed is a colloidal silica sol having silica particles and a method for preparing the sol, each particle having a thickness of from 5 to 20 mµ and having a diameter of from 40 to 300 my. Further disclosed is a silica sol having silica particles and a method for preparing the sol, each particles having a thickness of from 5 to 40 mµ and a diameter of from 40 to 500 mµ and a ratio Dl/D2 of from 5 to 30.
593983
Ando Mikio
Kagamimiya Tsutomu
Kawashima Makoto
Tanimoto Kenji
Watanabe Yoshitane
Gowling Lafleur Henderson Llp
Nissan Chemical Industries Ltd.
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