Stabilized sodium percarbonate composition
AssigneeTokai Denka Kogyo Kabushiki Kaisha
InventorsKanji Sato, Tomomasa Kondo
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Abstract
A stabilized sodium percarbonate is obtained by incorporating therein (A) at least one compound selected from the group consisting of mono- and dicarboxylic acids having not less than four carbon atoms and salts thereof; and (B) at least one compound selected from the group consisting of sulfates, nitrates and silicates of alkali metals and alkaline earth metals.
Claims29
Stable sodium percarbonate crystals or granules consisting essentially of sodium percarbonate and the following components (A) and (B) uniformly incorporated therein:
- (A) at least one compound selected from the group consisting of mono- and dicarboxylic acids having not less than four carbon atoms and salts thereof;
- and
- (B) at least one compound selected from the group consisting of sulfates, nitrates and silicates of alkali metals and alkaline earth metals, said component (A) and said component (B) each being present in an amount which is effective, in combination with the other component, to provide a stabilization effect to the sodium percarbonate.
A method of stabilizing sodium percarbonate prior to being incorporated in a detergent composition to prevent the sodium percarbonate from decomposing and losing stability upon contact with a zeolite or moisture present in the detergent composition, said method comprising:
- uniformly incorporating a composition consisting essentially of components (A) and (B) in crystals or granules of sodium percarbonate to provide a stable sodium percarbonate composition, said component (A) being at least one compound selected from the group consisting of mono and dicarboxylic acids having not less than four carbon atoms and salts thereof, and said component (B) being at least one compound selected from the group consisting of sulfates, nitrates and silicates of alkali metals and alkaline earth metals, said component (A) and said component (B) each being present in an amount which is effective, in combination with the other component, to provide a stabilizing effect to the sodium percarbonate.
Dependencies are inferred from the claim text.