Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application
AssigneeNovacarb
InventorsMichel Gubelmann, Michel Seguin
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Abstract
The use of silica for controlling the thermal degradation of bicarbonate of an alkaline, alkaline-earth metal or bicarbonate of ammonia with an average particle size less than or equal to 100 μm is disclosed. The resulting bicarbonate and silica mixtures may be used in cosmetics and detergents, and more particularly in formulae for toothpaste.
Claims19
A method for controlling the thermal degradation of alkali metal bicarbonate, alkaline earth metal bicarbonate or ammonium bicarbonate, wherein the mean size of bicarbonate particles is in the range of 20-100 μm, said method comprising mixing an effective amount of silica having a mean particle size in the range of 8-30 μm with said bicarbonate to control the thermal degradation of said bicarbonate.
A mixture of silica and alkali metal bicarbonate, alkaline earth metal bicarbonate or ammonium bicarbonate, comprising 0.1 to 15% by weight, with respect to the weight of the bicarbonate, of silica having a mean particle size in the range of 8-30 μm and said bicarbonate exhibits a mean particle size in the range of 20-100 μm.
Dependencies are inferred from the claim text.