Polysilicate microgels and silica-based materials

Details Polysilicate microgels and silica-based materials Polysilicate microgels and silica-based materials

C - Chemistry, Metallurgy

08

L

C08L 83/02 (2006.01) C08J 3/02 (2006.01) C08K 3/10 (2006.01) C08K 3/22 (2006.01)

Patent

CA 2481870

Aqueous silicate or polysilicate solutions are useful for preparing polysilicate microgels as drainage and retention aids in paper manufacture. The solutions contain an ion A which is calcium or magnesium, wherein the molar ratio of SiO2:A is less than 2000:1 and higher than 1:1, or have a molar ratio of SiO2:Na2O within the range of from 4.5:1 to 20:1 containing an ion B which is carbonate or phosphate, wherein the molar ratio of SiO2:B is less than 2000:1 and higher than 1:1.

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