Temperature-activated polysilicic acids
AssigneeJ. M. Huber Corporation
InventorSakari Saastamoinen
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Abstract
A temperature-activated polysilicic acid is prepared by heating an acidified aqueous alkali metal silicate. The temperature-activated polysilicic acid is used in the production of paper for improvement of retention and water removal.
Claims26
A process for producing a temperature-activated polysilicic acid comprising the steps of heating an acidified aqueous alkali metal silicate at a temperature of about 30.degree. to 250.degree. C. at a pH of about 0 to 5 to produce said temperature-activated polysilicic acid.
A process for producing a temperature-activated polysilicic acid comprising the steps of heating an acidified aqueous alkali metal silicate at a temperature of at least about 30.degree. C. at a pH of about 0 to 5 to produce said temperature-activated polysilicic acid.
Dependencies are inferred from the claim text.