Calcium silicate and process for producing same

Details Calcium silicate and process for producing same Calcium silicate and process for producing same

C - Chemistry, Metallurgy

01

B

25/132, 23/190

C01B 33/24 (2006.01) C04B 28/18 (2006.01) C04B 28/20 (2006.01) C04B 35/22 (2006.01)

Patent

CA 1134120

Abstract of the disclosure Globular secondary particles of wollastonite group calcium silicate crystals represented by the formula ?CaO?mSiO2?nH2O wherein 1 ? ? ? 6, 1 ? m ? 6 and 0 ? n ? 1, characterized in that the particles comprise hollow globular secondary particles of the wollastonite group calcium silicate crystals, the globular secondary particles having an average spontaneous sedimentation height of at least 800 ml, an outside diameter of 5 to 110 µm, an average apparent density of 0.04 to 0.09 g/cm3 and an average shell density defined by the equation Y = 0.0033X + B wherein Y is the average shell density, X is the average diameter of the particles, B is a constant, 15 µm ? X ? 40 µm and 0 ? B ? 0.115.

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