Process for stabilizing particulate alkali metal percarbonate
AssigneeSolvay Interox Limited
InventorsGraham Robert Horne, Alun Pryce James
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Abstract
The invention relates to a process for stabilizing particulate alkali metal percarbonate by coating by coating it with an aqueous solution, preferably concentrated, of a complex formed from a boric acid or borate and an organic diol, polyol or hydroxycarboxylic acid, to the resulting coated product, and to compositions including the product. The coating can additionally contain an alkali metal neutral salt such as sodium chloride or sodium sulphate.
Claims42
A process for stabilizing a particulate alkali metal percarbonate by coating it with an effective amount of boric acid or borate containing coating material, wherein the coating material comprises a complex of boric acid or a borate with an organic diol, a polyol, a hydroxycarboxylic acid, or a water soluble salt of a hydroxycarboxylic acid.
Particulate alkali metal percarbonate having improved stability by coating with an effective amount of a boric acid or borate containing coating material, wherein the coating material comprises a complex of boric acid or a borate with an organic diol, a polyol, a hydroxycarboxylic acid, or a water soluble salt of a hydroxycarboxylic acid.
A washing or bleaching composition containing at least one washing agent and a coated particulate alkali metal percarbonate having improved stability by being coated with an effective amount of a boric acid or borate containing coating material, wherein the coating material comprises a complex of boric acid or a borate with an organic diol, a polyol, a hydroxycarboxylic acid, or a water soluble salt of a hydroxycarboxylic acid.
Dependencies are inferred from the claim text.